Cooperative Patent Classification


CPC Definition - Subclass C08G

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Last Updated Version: 2018.01
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
Definition statement

This place covers:

Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. condensation polymers, where the polymers are:

Polymers from aldehydes or ketones, the polymers including polyacetals and phenol-formaldehyde-type resins such as novolaks or resoles,

Polymers from isocyanates or isothiocyanates, the polymers including polyurethanes and polyureas,

Epoxy resins,

Polymers obtained by reactions forming a carbon-to-carbon link in the main chain, e.g. Polyphenylenes and polyxylylenes,

Polymers obtained by reactions forming a linkage containing oxygen in the main chain, e.g. Polyesters, polycarbonates, polyethers and copolymers of carbon monoxide with aliphatic unsaturated compounds,

Polymers obtained by reactions forming a linkage containing nitrogen in the main chain, e.g. Polyamides, polyamines, polyhydrazides, polytriazoles, polyimides, polybenzimidazoles and nitroso rubbers,

Polymers obtained by reactions forming a linkage containing sulphur in the main chain, e.g. Polysulphides, polythioethers, polysulphones, polysulphoxides, polythiocarbonates and polythiazoles,

Polymers obtained by reactions forming a linkage containing silicon in the main chain, e.g. Polysiloxanes, silicones or polysilicates,

Other polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. Polymers obtained by reactions forming a linkage containing other elements in the main chain, e.g. P, b, al, sn, block copolymers obtained by inter-reacting polymers in the absence of monomers, dendrimers and hyperbranched polymers.

Processes for preparing the macromolecular compounds provided for in this subclass.

Relationships with other classification places

Composition of polymers with organic or inorganic additives should not be classified here.

Relationship with other subclasses of class C08 and C09

Subclasses C08B - C08L are generally function-oriented subclasses in relation to the polymers per se, while C09D - C09K are application-oriented subclasses in relation to the said polymers (see below for the special relationship with C09D and C09J).

Polysaccharides per se and their derivatives are classified in C08B.

Treatment and chemical modification of rubbers, including conjugated diene rubbers, are classified in C08C – however synthesis of rubbers and treatment or chemical modification of non-rubbers are classified in subclasses C08F or C08G.

Macromolecular compounds per se obtained by reactions only involving carbon-to-carbon unsaturated bonds (usually known as addition polymers) are in C08F. Compositions based on monomers of such polymers are also in C08F.

Macromolecular compounds per se obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds (usually known as condensation polymers) are classified in C08G. Compositions based on monomers of such polymers are also classified in C08G.

Derivatives of natural macromolecular polymers per se, e.g. derived from proteins or vulcanised oils, are classified in C08H.

Working-up, general processes of compounding and after-treatment are covered by subclass C08J. These include making solutions, dispersions etc., plasticising, compounding with additives, e.g. colouring or masterbatching, crosslinking, manufacture of articles or shaped materials, chemical treatment or coating of such articles, making porous, cellular or foamed materials, and recovery or working up of waste materials.

Use or choice of inorganic or non-macromolecular organic materials as compounding agents are classified in C08K; Compositions classified in C08K according to note 3 of C08K, are not classified in C08L. However, if a composition contains two polymers and an additive following C08K, classification is made in C08L. Only if the polymer itself is part of the invention (and not trivial), should the document be classified in C08G as well.

Coating compositions and other polymer compositions for similar uses, e.g. paints, inks, woodstains and printing pastes, are classified in C09D.

C09G covers the application of the compositions of C08L when used as polishes.

Adhesives and adhesive processes are classified in C09J.

Materials used in applications not otherwise provided for, are classified in C09K. These include sealing or anti-slip materials, heat-transfer, heat-exchange or heat-storage materials, drilling compositions, luminescent or tenebrescent materials, etching, surface-brightening or pickling materials, antioxidant materials, soil-conditioning or soil-stabilising materials, liquid crystal or fireproofing materials.

Multiple classification

Application of macromolecular compositions as biocides, pest-repellants, pest-attractants, or plant growth activity regulators is further classified in subclass A01P.

Therapeutic activity of macromolecular compounds is further classified in subclass A61P (as secondary classification).

The use of cosmetics or similar toilet preparations is further classified in subclass A61Q.Processes using enzymes or microorganisms in order to (i) liberate, separate or purify a pre-existing compound or composition, or to (ii) treat textiles or clean solid surfaces of materials, are further classified in subclass C12S.

Relationship between C08F, C08G, C08L, C09D and C09J

Polymers as such, or their preparations are classified in C08F or C08G.

Polymer compositions are classified in C08L.

Coating compositions are classified in C09D and adhesive compositions are classified in C09J.

C09D and C09J are seen as "related fields" of C08L - this structure has implications on search and classification.

For classification:

if the claims only pertain to a "coating composition...", only the C09D class is given.

if the claims pertain to a composition as such and to coating (e.g. "composition for use as coating..."), both the C09D class and the corresponding C08L class are given.

For searching: both classes are to be searched, regardless of the wording of the claims, since in many documents of C08L, a passage relating to the use of the composition for coating can be found.

These rules apply in analogy for the adhesive compositions of C09J.

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Application of macromolecular compositions as pesticides or herbicides

Application of macromolecular compositions as pharmaceutical compositions or cosmetics

Application for golf balls

Application for hollow fibres membranes

Application for tyres

Application of macromolecular compositions as explosive compositions

Application of macromolecular compositions in coating compositions

Application of macromolecular compositions in adhesive compositions

Application of macromolecular compositions in lubricants

Application for fibres

Application for non-woven fabrics

Application for the treatment of fibres with polymers

D06M5/00

Application for tubes

Application for optical articles, optical parts, e.g. contact lenses

Application for optical elements e.g. polarizer

Application for cables or wires

Application for printed circuits, in particular photosensitive compositions

Informative references

Attention is drawn to the following places, which may be of interest for search:

Layered products

Liquid crystal compositions

Electrolytic processes, e.g. electrophoresis

C25

Special rules of classification

In this subclass, group C08G 18/00 takes precedence over all other groups. A further classification is given if the polymers are obtained by reactions forming specific linkages for which an appropriate group is provided.

Within each main group of this subclass, in the absence of an indication to the contrary, classification is made in the last appropriate place.

In groups C08G 61/00-C08G 79/00, in the absence of an indication to the contrary, macromolecular compounds obtained by reactions forming two different linkages in the main chain are classified only according to the linkage present in excess.

In group C08G 18/00, for the purpose of groups C08G 18/28-C08G 18/69, the addition of water for the preparation of cellular materials is not taken into consideration.

When classifying in group C08G 18/00, it is desirable to add the Indexing Code of C08G 2101/00 relating to manufacture of cellular products.

This subclass also covers compositions based on monomers which form macromolecular compounds classifiable in this subclass. In this subclass:

if the monomers are defined, classification is made in groups C08G 2/00-C08G 79/00, C08G 83/00 according to the polymer to be formed;

if the monomers are defined in a way that a composition cannot be classified within one main group of this subclass, the composition is classified in group C08G 85/00;

if the compounding ingredients are of interest per se, classification is also made in subclass C08K.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Addition polymers

Polymers in which unsaturated monomer molecules join together to form a polymer in which the molecular formula of the repeat unit is identical (except for the double bond) with that of the monomer.

Block polymers

Polymers formed by polymerization of monomers on to a macromolecule having groups capable of inducing the formation of new polymer chains bound at one or both ends of the starting macromolecule, or by polymerization using successively different catalyst types or successively different monomer systems without deactivating the intermediate polymer.

Condensation polymers

Polymers in which water or some other simple molecule is eliminated from 2 or more monomer molecules as they combine to form the polymer or crosslinks between polymer chains.

Copolymers

Usually denotes polymers of 2 chemically distinct monomers, and sometimes denotes terpolymers containing more than 2 types of monomer unit.

Graft polymers

Macromolecular compounds obtained by polymerizing monomers on to preformed polymers or on to inorganic materials. Such preformed polymers could be rubbers, polysaccharides, condensation polymers, homopolymers or copolymers of the addition polymer type.

Synonyms and Keywords

In patent documents, the following abbreviations are often used:

CPET

Crystallised polyethylene terephthalate

DABCO

1,4-diazabicyclo-2,2,2-octane or triethylene diamine (amine catalyst for PU foams)

DBP

Dibutyl phthalate

DOP

Dioctyl phthalate

HDI

Hexamethylene diisocyanate

IPDI

Isophorone diisocyanate

MDI

Diphenylmethane-4,4'-diisocyanate

PBT

Polybutylene terephthalate

PEEK

Polyetheretherketone

PEG

Polyethylene glycol

PEI

Polyetherimide

PEK

Polyetherketone

PEO

Polyethylene oxide

PES

Polyethersulphone

PET

Polyethylene terephthalate

PPE

Polyphenylene ether

PPS

Polyphenylene sulphide

PPSU

Polyphenylene sulphone

PUR

Polyurethane

TETA

Triethylene tetramine

TDI

Toluene diisocyanate

Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
Definition statement

This place covers:

  • Addition polymers from aldehydes or ketones, i.e. polyacetals and copolyacetals
  • Catalysts used for such polymerisation
  • Post-polymerisation treatments of such resins.
  • Polymerization of aldehydes or ketones initiated by wave energy or particle radiation
  • Chemical modification of such resins by after-treatment
References
Limiting references

This place does not cover:

Addition polymers of heterocyclic oxygen compounds containing in the ring at least –O-C-O-

Condensation polymers of aldehydes or ketones only

Catalysts in general

Polymerisation of acetaldehyde or cyclic oligomers thereof
Definition statement

This place covers:

Polymerisation of acetaldehyde or cyclic oligomers thereof e.g. polymerisation of trioxane

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Condensation polymers of aldehydes or ketones with polyalcohols; Addition polymers of heterocyclic oxygen compounds containing in the ring at least once the grouping —O—C—O— (of cyclic oligomers of aldehydes C08G 2/00)
Definition statement

This place covers:

  • Condensation polymers of aldehydes or ketones with polyalcohols, e.g. the condensation product of formaldehyde and poly(alkylene oxides)
  • Addition polymers of heterocyclic oxygen compounds containing in the ring at least once the grouping -O-C-O- , e.g. addition polymers of dioxolane, i.e. -
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    -
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    .
References
Limiting references

This place does not cover:

Cyclic oligomers of aldehydes

Condensation polymers of aldehydes or ketones only
Definition statement

This place covers:

  • condensation polymers of aldehydes only
  • condensation polymers of ketones only
  • condensation polymers of aldehydes with ketones only
of aldehydes with ketones
Definition statement

This place covers:

Condensation polymers of aldehydes with ketones only, see for example WO2007141119 or US2005080222

Condensation polymers of aldehydes or ketones with phenols only
Definition statement

This place covers:

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Novolac resin

Phenol-formaldehyde resin where the molar ratio of formaldehyde to phenol of less than one, prepared in the presence of an acid catalyst

Resol resin

Phenol-formaldehyde resin where the formaldehyde to phenol ratio is greater than one, prepared in the presence of a base

Condensation polymers of aldehydes or ketones with aromatic hydrocarbons or halogenated aromatic hydrocarbons only
Definition statement

This place covers:

For example,

Naphthalene-formaldehyde polymer (C08G 10/02).

Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen (aminophenols C08G 8/16)
Definition statement

This place covers:

For example

References
Limiting references

This place does not cover:

Condensation polymers of aldehyde or ketone with aminophenol

Reaction of polyamides with aldehydes

Special rules of classification

Within this main group, in the absence of an indication to the contrary, classification is made in the last appropriate place. This means that urea-melamine-formaldehyde resins are classified in C08G 12/38.

Synonyms and Keywords

In patent documents, the following abbreviations are often used:

MF

Melamine-formaldehyde

UF

Urea-formaldehyde

Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G 8/00 - C08G 12/00
Definition statement

This place covers:

for example

  • Melamine-phenol-formaldehyde resins (C08G 14/10)
  • Urea-phenol-formaldehyde resins (C08G 14/08), see EP2197928.
Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G 4/00 - C08G 14/00 (with polynitriles C08G 69/38)
Definition statement

This place covers:

For example, condensation of aldehydes or ketones with natural products, oils, bitumens or residues.

References
Limiting references

This place does not cover:

Condensation polymers of aldehydes or ketones with polynitriles

Polymeric products of isocyanates or isothiocyanates (preparatory processes of porous or cellular materials, in which the monomers or catalysts are not specific C08J)
Definition statement

This place covers:

  • Polyurethanes, polyureas and isocyanurates, i.e. polymeric products of isocyanates or isothiocyanates and compounds that are reactive towards isocyanates or isothiocyanates and some processes specific for these polymers.
References
Limiting references

This place does not cover:

Polymeric products containing ureide or urethane prepared without using isocyanate or isothiocyanate

Preparation of isocyanates or isothiocyanates

Preparatory processes of porous or cellular materials, in which the monomers or catalysts are not specific

Informative references

Attention is drawn to the following places, which may be of interest for search:

Preparations for medical, dental or toilet purposes

Processes for applying liquid materials to surfaces

Shaping or joining plastics

Mould release agents

Layered products comprising polyurethanes

Working up of polyurethanes to porous or cellular articles

Use of inorganic or non-macromolecular organic substances as compounding ingredients

Coating compositions characterized by their physical nature or their effects produced

Adhesives processes

Materials for sealing

Special rules of classification

In this group the Indexing Codes C08G are added, in particular C08G 2101/00 - C08G 2410/00.

Synonyms and Keywords

CPP

Copolymer polyol

DABCO

1,4-Diazabicyclo(2.2.2)octane

DMPA

Dimethylol propionic acid

EDA

Ethylene diamine

EO

Ethylen oxide

HDI

Hexane diisocyanate

H12MDI

Dicyclohexylmethane diisocyanate

IEM

Isocyanato ethyl methacrylate

IPDI

Isophorone diisocyanate

JEFFAMINE

Amine capped polyether

MDI

4,4-Methylenebis(phenyl)isocyanate

PEG

Polyethyleneglycol

PIR

Polyisocyanurate

PMDI

Polymethylene poly(phenylisocyanate)

PO

Propylene oxide

PPG

Polypropylene glycol

PTMO

Polytetramethylene oxide

TDI

Toluene diisocyanate

TMP

Trimethylol propane

TMXDI

Trimethylol propane

TPU

Tetramethylxylylene diisocyanate

XDI

Xylylene diisocyanate

of isocyanates or isothiocyanates only
Definition statement

This place covers:

  • Polymerisation of isocyanates or isothiocyanates in the absence of compounds that are reactive towards isocyanate or isothiocyanate.
References
Limiting references

This place does not cover:

Oligomerisation in the presence of compounds that are reactive towards isocyanate

Use of oligomerised isocyanates

Oligomerised isocyanates per se

C07C or C07D

Processes
Definition statement

This place covers:

Process features such as catalysts which are specific for polymeric products of isocyanates or isothiocyanates and are not covered elsewhere

References
Limiting references

This place does not cover:

Working-up of polymeric products of isocyanates or isothiocyanates to foams

comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture (use of preformed oligomers C08G 18/79)
Definition statement

This place covers:

Oligomerisation of isocyanates in the presence of compounds that are reactive towards isocyanate

References
Limiting references

This place does not cover:

Polymerisation of isocyanates in the absence of compounds that are reactive towards isocyanate

Use of oligomerized isocyanates

Special rules of classification

Additional information: oligomerisation to isocyanurate groups are classified in C08G 2105/02.

Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step ({C08G 18/0838 takes precedence}; masked polyisocyanates C08G 18/80)
Definition statement

This place covers:

Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen having a high molecular weight (more than 10 repeating monomer units or a molecular weight higher than 500) in a first reaction step

References
Limiting references

This place does not cover:

Isocyanates or isothiocyanates reacted with low molecular weight active hydrogen compounds

Masked polyisocyanates

Special rules of classification

In this subgroup combination sets can be used: see Note after C08G 18/10 title.

C08G 18/0838 takes precedence over this subgroup.

Low-molecular-weight compounds {(C08G 18/2805 takes precedence)}
Definition statement

This place covers:

Compounds containing active hydrogen and having a molecular weight of less than 500 or have less than 10 repeating monomer units.

Special rules of classification

C08G 18/0838 takes precedence over this subgroup.

Polyhydroxy compounds; Polyamines; Hydroxyamines
Definition statement

This place covers:

Compounds having more than one group containing active hydrogen.

High-molecular-weight compounds {(C08G 18/2805 takes precedence)}
Definition statement

This place covers:

Compounds having more than one group containing active hydrogen and having a molecular weight of more than 500 or having more than 10 repeating monomer units.

Special rules of classification

C08G 18/0838 takes precedence over this subgroup.

Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers
Definition statement

This place covers:

What is known in industry as, "polymer polyols": polymers containing active hydrogen (polyol) with particles prepared from polymerised carbon to carbon unsaturated monomers grafted onto the active hydrogen polymer or forming a block copolymer with the active hydrogen polymer.

The polymerised carbon to carbon unsaturated monomer particles are dispersed in the active hydrogen containing polymer (polyol) which is reactive towards isocyanate. The polymerised carbon to carbon unsaturated monomer particles themselves are therefore not reactive towards isocyanate.

References
Limiting references

This place does not cover:

Macromolecular compounds obtained by polymerising monomers on to polymers of C08G

Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen {(C08G 18/2805 takes precedence)}
Definition statement

This place covers:

Mixtures of low molecular weight compounds having active hydrogen with high molecular weight compounds (more than 10 repeating monomer units or a molecular weight higher than 500) having active hydrogen where either the low molecular weight (less than 10 repeating monomer units or a molecular weight lower than 500) compound is essential for the invention or where the high molecular weight (more than 10 repeating monomer units or a molecular weight heigher than 500) compound is not a compound of groups C08G 18/42 , C08G 18/48 or C08G 18/52

Special rules of classification

C08G 18/0838 takes precedence over this subgroup.

Compounds of groups C08G 18/42, C08G 18/48, or C08G 18/52
Definition statement

This place covers:

Mixtures of low molecular weight compounds having active hydrogen with high molecular weight compounds having active hydrogen from the groups C08G 18/42 , C08G 18/48 or C08G 18/52

Unsaturated compounds having active hydrogen
Definition statement

This place covers:

Compounds that have Carbon to Carbon unsaturation and groups that are reactive towards isocyanate/isothiocyanate

Special rules of classification

In this subgroup, combination sets can be used following the note after the group title.

characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
Definition statement

This place covers:

Use of oligomerised isocyanates.

References
Limiting references

This place does not cover:

Oligomerisation of isocyanates in the absence of compounds that are reactive towards isocyanate

Oligomerisation in the presence of compounds that are reactive towards isocyanate

Oligomerised isocyanates per se

C07C or C07D

Masked polyisocyanates
Definition statement

This place covers:

Blocked polyisocyanates or polyisocyanates prereacted with low molecular weight compounds having active hydrogen.

References
Limiting references

This place does not cover:

Prepolymers, i.e. polyisocyanates prereacted with high molecular weight compounds having active hydrogen

Chemically modified polymers
Definition statement

This place covers:

Chemical modification of polyurethanes other than through reaction with isocyanate or isothiocyanate

References
Limiting references

This place does not cover:

Compositions of unspecified macromolecular compounds having specific groups

Polycondensates containing more than one epoxy group per molecule (low-molecular-weight polyepoxy compounds C07); Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
Definition statement

This place covers:

Epoxy resins, i.e. all polycondensates having more than one epoxy groups per molecule (diepoxides and polyepoxides).

Epoxy resins characterized by special parameters.

Relationships with other classification places

The use or choice of inorganic or non-macromolecular organic materials as compounding agents are classified in subclass C08K.

Compositions of macromolecular compounds, either with other macromolecular compounds or with other ingredients, including compositions of polysaccharides, rubbers or natural macromolecular compounds, are classified in subclass C08L.

Coating compositions and other polymer compositions for similar uses, e.g. paints, inks, woodstains and printing pastes, are classified in subclass C09D.

Adhesives and adhesive processes are classified in subclass C09J.

Materials for applications not otherwise provided for, or applications of materials not otherwise provided for, are classified in subclass C09K. These include sealing or anti-slip materials, heat-transfer, heat-exchange or heat-storage materials, drilling compositions, luminescent or tenebrescent materials, etching, surface-brightening or pickling materials, antioxidant materials, soil-conditioning or soil-stabilising materials, liquid crystal or fireproofing materials.

Subclasses C08B-C08L are generally function-oriented subclasses in relation to the polymers they cover, while C09D-C09K are application-oriented subclasses in relation to the said polymers.

References
Limiting references

This place does not cover:

Low-molecular-weight polyepoxy compounds

C07

Monoepoxide compounds, e.g. oxiranes or preparation of oxiranes

Informative references

Attention is drawn to the following places, which may be of interest for search:

Polymers containing ether groups, e.g. oxetanes

Polymers containing S- link, e.g. thiiranes

Compositions of homo- or copolymers of acrylic or methacrylic esters having pendent glycidyl groups

Special rules of classification

No Indexing Codes are used in this group.

Last place rule:

When an epoxy composition comprises a special hardener, or mixtures of special hardeners, catalysts or characteristic epoxy resins, classification is given in C08L 63/00, but also the corresponding classes in subgroups of C08G 59/00, since C08G 59/00 is much more detailed.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Epoxy resins

All polycondensates having more than one epoxy groups per molecule

Synonyms and Keywords

Bisphenol A

4,4'-(Propane-2,2-diyl)diphenol

Bisphenol F

2-[(2-Hydroxyphenyl)methyl]phenol

Bisphenol S

4-(4-Hydroxyphenyl)sulfonylphenol

DGEBA

Diglycidyl ether of bisphenol A

Epoxide

Oxirane

Glycidyl-

2,3-Epoxypropyl-

Hardener

Crosslinker

Polycondensates containing more than one epoxy group per molecule
Definition statement

This place covers:

The preparation of epoxy resins, in a general way.

References
Limiting references

This place does not cover:

Chemical after-treatment of diepoxides or polyepoxides

Polymers obtained by pre-reaction of diepoxides or polyepoxides with curing agents

{characterised by the preparation process or apparatus used}
Definition statement

This place covers:

Polycondensates containing more than one epoxy group per molecule, characterised by the preparation or apparatus used.

References
Limiting references

This place does not cover:

Chemical after-treatment of diepoxides or polyepoxides

Polymers obtained by pre-reaction of diepoxides or polyepoxides with curing agents

{characterised by the purification methods used}
Definition statement

This place covers:

Polycondensates containing more than one epoxy group per molecule, characterized by the purification methods.

References
Limiting references

This place does not cover:

Chemical after-treatment of diepoxides or polyepoxides

Polymers obtained by pre-reaction of diepoxides or polyepoxides with curing agents

{obtained by epoxydation of unsaturated precursor, e.g. polymer or monomer}
Definition statement

This place covers:

Preparation of polycondensates containing more than one epoxy group per molecule, where an unsaturated precursor is epoxydized, e.g. by an oxidative step.

References
Limiting references

This place does not cover:

Chemical after-treatment of diepoxides or polyepoxides

Polymers obtained by pre-reaction of diepoxides or polyepoxides with curing agents

Polycondensates modified by chemical after-treatment
Definition statement

This place covers:

The modification of epoxy resins, by further reaction with organic or inorganic compounds.

References
Limiting references

This place does not cover:

Epoxy resins obtained by unsaturated monomeric or polymeric precusors

Polymers obtained by pre-reaction of diepoxides or polyepoxides with curing agents

Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups {; e.g. general methods of curing}
Definition statement

This place covers:

Polymers obtained by polycondensation of epoxy resins with curing agents or catalysts

Advancement polymers having end epoxy groups.

References
Limiting references

This place does not cover:

Macromolecules obtained by epoxydation of unsaturated precursor, e.g. polymer or monomer

Chemical after-treatment of diepoxides or polyepoxides

Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule (C08G 2/00 - C08G 16/00 take precedence)
Definition statement

This place covers:

  • Polymers obtained by reactions forming a carbon-to-carbon link in the main chain otherwise than by addition polymerisation reactions only involving carbon-to-carbon unsaturated bonds (wherein in the latter case the reactive carbon-carbon group stays intact without cleavage of fragments). The polymers included in this main group are typically prepared by means of polycondensation reactions.
  • Polyphenylenes
  • Polyxylylenes
  • Polyfluorenes
  • Polynorbornenes prepared by ring-opening metathesis reactions
  • Poly(ether ketone ketones) prepared from diacid chloride compounds and aryl comonomers by means of Friedel-Crafts reactions (classified in C08G 61/127)
  • Polymers prepared by polycondensation reactions involving the reactions between aryl compounds and co-monomers containing methylol groups or protected methylol groups or chloromethyl moieties.
Relationships with other classification places

Relationship with other subclasses and main groups of classes C08 and C09:

Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds under polyaddition reactions wherein the reactive carbon-carbon group stays intact without cleavage of fragments are classified in subclass C08F.

Corresponding main groups for the polymers according to main group C08G 61/00 can be found in the main groups C08L 65/00 (compositions based on such polymers), C09D 165/00 (coating compositions based on said polymers), and C09J 165/00 (adhesive compositions based on such polymers).

Relationship with main groups of the same subclass C08G:

Polymers prepared by condensation reactions of aldehydes or ketones with phenols only are classified in groups C08G 8/00 - C08G 8/38, since C08G 2/00 - C08G 16/00 takes precedence. For the same reasons, condensation polymers of aldehydes or ketones only are classified in C08G 6/00 - C08G 6/02. Polymers which may otherwise be formed by carbon-carbon bond formation, but which are prepared by condensation reactions other than those involving the formation of carbon-carbon bonds in the main chain, are classified in the appropriate groups, e.g. C08G 73/0611 for polypyrroles formed from amines and polyketones. Polyketones are classified in C08G 67/02.

References
Limiting references

This place does not cover:

Production of polymers using enzymes

Informative references

Attention is drawn to the following places, which may be of interest for search:

Condensation polymers of aldehydes with phenols only

Condensation polymers of aldehydes with aromatic hydrocarbons or halogenated aromatic hydrocarbons only

Poly(ether ketones) obtained by reactions forming an ether link in the main chain of the macromolecule

Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecules obtained by reactions forming a linkage containing nitrogen, including polypyrroles

Complementary pieces of information concerning C08G 61/00

Catalysts in general

Polyacetylenes prepared by polyaddition

Compositions, coating compositions and adhesive compositions based on polymers according to main group C08G 61/00 are classified in main groups

Conductors characterised by the conductive material: Intrinsically conductive polymers

Solid state devices using oligomeric or polymeric organic materials as the active part, or using a combination of organic materials including organic oligomers or polymers with other materials as the active part

Special rules of classification

In the subclass C08G, main group C08G 18/00 takes precedence over all other groups. A further classification is given if the polymers are obtained by reactions forming specific linkages for which an appropriate group is provided.

Within each main group of this subclass, in the absence of an indication to the contrary, classification is made in the last appropriate place.

In main groups C08G 61/00-C08G 79/00, in the absence of an indication to the contrary, macromolecular compounds obtained by reactions forming two different linkages in the main chain are classified only according to the linkage present in excess.

In the subgroup C08G 61/12, the following peculiarities apply:

For polymers comprising different heterocyclic constituents in the polymer main chain, a classification will be put for each. For example, a polymer consisting of thiophene, pyrrole, and triphenylamine in polymerised form will be classified in C08G 61/12 for the triphenylamine, C08G 61/124 and C08G 61/126.

Polymers according to C08G 61/00 which have been obtained from five-membered heterocyclic monomers comprising more than one heteroatom in the heterocycle will be classified in C08G 61/123.

When the macromolecular compounds are formed from condensed heterocyclic monomers, e.g. 2,1,3-benzothiadiazole, which comprise a five- or six-membered heterocycle, such a compound would still be considered derived from five- or six-membered heterocyclic compounds.

For example, a polymer derived from a 2,1,3-benzothiadiazole starting compound would be classified in C08G 61/123. Complementary structural aspects, such as codification of condensed heterocycles, are classified in C08G 2261/30 -C08G 2261/376.

When assigning the main group C08G 61/00 or subgroups thereof to a document, classification in the main group C08G 2261/00 and/or subgroups thereof is obligatory.

In the absence of an indication to the contrary, classification is made in the last appropriate place within C08G 2261/00 and subgroups. Classification in this main group is obligatory when classes in C08G 61/00 and subgroups thereof are assigned to a document.

3,4-Ethylenedioxythiophene in polymerised form is classified in C08G 2261/1424 plus C08G 2261/3223 and not in C08G 2261/344 (the aspect of cyclised ether side-chain is prominent).

C08G 2261/46 is only used as an additional symbol for classifying Diels-Alder crosslinking reactions of polymers prepared by reactions falling within the scope of C08G 61/00 - C08G 61/128 (since polymerisations effected by Diels-Alder cycloadditions are polyaddition reactions per se covered by subclass C08F of the classification scheme).

In C08G 2261/30, the following peculiarities apply: For polymers comprising different heterocyclic constituents in the polymer main chain, a classification will be entered for each. E.g. a polymer consisting of thiophene, pyrrole, and triphenylamine in polymerised form will be classified in C08G 2261/3162 (triphenylamine), C08G 2261/3221 (pyrrole), and C08G 2261/3223 (thiophene).

When the macromolecular compounds are formed from condensed heteroaromatic monomers which comprise various aromatic heterocycles, each heterocycle will be classified (of course as condensed ring system). For example, thieno[3,4-b]pyrazine in polymerised form will be classified in C08G 2261/3243 (a condensed thiophene unit) and in C08G 2261/3241 (standing for the condensed pyrazine ring).

In condensed aromatic ring systems comprising aromatic and heteroaromatic condensed rings only the heteroaromatic rings will be specified in C08G 2261/00 - C08G 2261/964. For example, benzo[c]thiophene in polymerised form will be classified in C08G 2261/3243.

When partially aromatic (or heteroaromatic) structural elements are incorporated into the polymeric main chain, which can be broken down into smaller main chain constituents, the latter should also be classified (unless specific pertinent subgroups such as C08G 2261/3424 or C08G 2261/3442 exist):

E.g. a 2,5-diethinylthiophene monomeric unit should be classified in C08G 2261/344, C08G 2261/3223, and in C08G 2261/3328 (since the polymer could have been prepared from thienyl and ethinyl monomers instead).

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Addition polymer

Polymer which is formed by an addition reaction, where monomers bond together via rearrangement of bonds without the loss of any atom or molecule. This is in contrast to a condensation polymer which is formed by a condensation reaction where a molecule, such as water, is cleaved off during the formation.

Condensation polymer

Polymer in which water or some other simple molecule is eliminated from 2 or more monomer molecules as they combine to form the polymer.

Synonyms and Keywords

In patent documents, the following abbreviations are often used:

ADMET

Acyclic diene metathesis

ROMP

Ring-opening metathesis polymerisation

Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule (polyester-amides C08G 69/44; polyester-imides C08G 73/16)
Definition statement

This place covers:

Polymeric products containing ester bonds in the backbone.

References
Limiting references

This place does not cover:

Polyester-urethanes

Polycarbonates

Polyester-amides

Polyester-imides

Block- and graft copolymers containing polyester and polysiloxane sequences

Block or graft copolymers containing ester bonds and sequences of polymers of C08C and C08F

Polymers based on ethylenically unsaturated monomers containing ester bonds in the side chain

Graft polymers obtained by polymerizing unsaturated monomers on polyesters

Polyhydroxycarboxylic acids obtained by fermentation or enzyme-using processes

Informative references

Attention is drawn to the following places, which may be of interest for search:

Dendrimers, hyperbranched polymers, polyrotaxanes, polycatenanes or supramolecular polymers

Preparation of medical dental or toilet purposes

Chemical aspects of and materials for bandages, dressings, absorbent pads or surgical articles

Layered products comprising polyesters

Polyhydroxy compounds

Polycarboxylic or hydrocarboxylic acids

Use of inorganic or non-macromolecular organic substances a compounding ingredients

Degradable polymer compositions

Coating compositions characterized by their physical nature or their effects produced

Polyester fibres

Binders for toners

Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
Definition statement

This place covers:

Polyester not provided for in groups C08G 63/06 - C08G 63/6988.

derived from hydroxycarboxylic acids
Definition statement

This place covers:

Polyesters containing sequences obtained by polycondensation of one or more ω-hydroxycarboxylic acid derivatives, e.g. hydroxyalkanoates

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Polyhydroxycarboxylic acids containing oxygen in the form of ether groups

Polyhydroxycarboxylic acids containing atoms other than carbon, hydrogen and oxygen

Lactones or lactides
Definition statement

This place covers:

Polyesters containing sequences obtained by ring-opening of one or more cyclic esters, e.g. polylactic acid or ε-caprolactone.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Processes for the preparation of polylactones and polylactides characterized by the catalyst used

derived from polycarboxylic acids and polyhydroxy compounds
Definition statement

This place covers:

Polyesters derived from polycarboxylic acids and polyhydroxy compounds which have been prepared in the presence of 10 wt% or more of ester forming compounds having more than two reactive groups.

References
Limiting references

This place does not cover:

Polyesters having been prepared in the presence of less than 10 wt% of compounds having more than two reactive groups

Polyesters containing oxygen in the form of ether groups

Polyesters containing atoms other than carbon, hydrogen and oxygen

Polyesters modified by chemical after-treatment

Dicarboxylic acids and dihydroxy compounds
Definition statement

This place covers:

Polyesters containing sequences obtained by polycondensation of one or more dicarboxylic acids and one or more dihydroxy compounds.

References
Limiting references

This place does not cover:

Polyesters containing oxygen in the form of ether groups

Polyesters containing atoms other than carbon, hydrogen and oxygen

Polyesters modified by chemical after-treatment

Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups
Definition statement

This place covers:

Polyesters derived from dicarboxylic acids and dihydroxy compounds which have been prepared in the presence of less than 10 wt% of compounds having one reactive group or more than two reactive groups.

References
Limiting references

This place does not cover:

Polyesters derived from dicarboxylic acids and dihydroxy compounds which have been prepared in the presence of 10 wt% or more of compounds having more than two reactive groups

by unsaturated monocarboxylic acids or unsaturated monohydric alcohols or reactive derivatives thereof
Definition statement

This place covers:

Polyesters chemically modified by esterification with unsaturated monoacids or monoalcohols.

References
Limiting references

This place does not cover:

Polymeric reaction products of polyesters which are chemically modified by esterification with unsaturated acids or alcohols with ethylenically unsaturated compounds

Informative references

Attention is drawn to the following places, which may be of interest for search:

Polyesters derived from polycarboxylic acids and polyhydroxy compounds modified by chemical after-treatment

Polyesters containing both carboxylic ester groups and carbonate groups
Definition statement

This place covers:

Polymers containing carboxylic ester groups and carbonate groups, even if the carbonate groups are in excess.

Polyesters containing oxygen in the form of ether groups (C08G 63/42, C08G 63/58 take precedence)
Definition statement

This place covers:

Polyesters containing ether groups of any kind, e.g. sugar moieties, polyalkylene oxide sequences.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule

Special rules of classification

C08G 63/42 and C08G 63/58 take precedence over C08G 63/66.

Polyesters containing atoms other than carbon, hydrogen and oxygen (C08G 63/64 takes precedence)
Definition statement

This place covers:

Polyesters containing heteroatoms at any place in the side- or main chain

{characterised by the apparatus used}
Definition statement

This place covers:

Preparation processes in which the process or a step thereof is characterized by the apparatus or a feature thereof

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Apparatuses for preparing polymers

Extrusion molding

{for the preparation of polylactones or polylactides}
Definition statement

This place covers:

Processes in which the preparation of polylactones or polylactides is characterized by the catalyst used.

References
Limiting references

This place does not cover:

Polylactones or polylactides

Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule (polycarbonate-amides C08G 69/44; polycarbonate-imides C08G 73/16)
Definition statement

This place covers:

Polymeric products containing carbonate bonds in the backbone.

References
Limiting references

This place does not cover:

Polycarbonate-urethanes

Polyesters

Polycarbonates containing ester groups in the backbone

Polycarbonate-amides

Polycarbonate-imides

Informative references

Attention is drawn to the following places, which may be of interest for search:

Dendrimers, hyperbranched polymers, polyrotaxanes, polycatenanes or supramolecular polymers

Layered products comprising polycarbonates

Carbonates

Use of inorganic or non-macromolecular organic substances a compounding ingredients

Polycarbonate fibres

Polycarbonate lenses

Polycarbonate binders for toners

Polycarbonate record carriers

Block or graft polymers
Definition statement

This place covers:

Block- and graft copolymers containing polycarbonate sequences and sequences of polymers of C08G.

References
Limiting references

This place does not cover:

Polycarbonates containing blocks of ester groups in the backbone

Block or graft copolymers containing carbonate bonds and sequences of polymers of C08C and C08F

Graft polymers obtained by polymerizing unsaturated monomers on unsaturated polycarbonates

Informative references

Attention is drawn to the following places, which may be of interest for search:

Block- or graft polymers containing polycarbonate and polysiloxane sequences

from cyclic ethers and other compounds
Definition statement

This place covers:

Preparation of polyether by ring opening reaction of cyclic ether in the presence of "other compound" e.g. active H containing compound which acts as an initiator for polymerisation. e.g. R-OH + n ethylene oxide → R-(O-CH2-CH2)n

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Preparation of ethers by reaction of an oxirane with hydroxy group

Special rules of classification

(1) If the "other compound" contains two different active H containing groups, the compound should be classified in both relevant groups e.g. aminoethanol should be classified in C08G 65/2609 and C08G 65/2624.

(2) If the "other compound" is sugar or polysaccharide containing OH groups, classification should be made in C08G 65/2606.

(3) Aniline is classified in C08G 65/2627 which reads " Aromatic or arylaliphatic amine group" .

(4) Pyridine or piperazine are classified in C08G 65/263 which reads "Heterocyclic amine" .

{characterised by the catalyst used}
Definition statement

This place covers:

Compounds characterised by the catalyst used in the ring opening reaction between a cyclic ether and an "other compound".

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Catalysts per se

Cyanide catalysts

Special rules of classification

(1) Classification is made according to the metal in the catalyst if any.

(2) Boron is considered a metal.

(3) Magnesium is to be considered an alkaline earth metal.

(4) If a catalyst is classified in C08G 65/269 (mixed catalyst systems), then separate components should be classified as well; for example,

(5) If a catalyst should be classified in C08G 65/2693 – then if possible both components should be classified, e.g. aluminium supported on clay based catalyst is classified in C08G 65/2693, C08G 65/2654 and C08G 65/2657.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

DMC

Double Metal Cyanide

Post-polymerisation treatment, e.g. recovery, purification, drying
Definition statement

This place covers:

Post-polymerisation treatment of cyclic ethers made exclusively by ring opening reactions of cyclic ethers, e.g. recovery, purification, drying or removal of catalyst residues even if done by chemical means for example acidification.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Separation or purification of ethers

from phenols (I) and other compounds (II), e.g. OH-Ar-OH + X-Ar-X, where X is halogen atom, i.e. leaving group
Definition statement

This place covers:

Polyethers made from phenols and other compounds e.g. OH-Ar-OH + X-Ar-X where X is a halogen leaving groups. It encompasses aromatic (Ar) polyethers or polyetherketones.

References
Limiting references

This place does not cover:

Polyetherketones made by Friedel -Krafts acylation

Polyphenylene ether/oxide

Polyketones from carbon monoxide

Polyetherimides

Polythioether-ethers

C08G75/15

Polyethersulphones

Informative references

Attention is drawn to the following places, which may be of interest for search:

Polyethersuphones

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

PEK

Polyetherketones

PEEK

Polyetheretherketones

PES

Polyethersulphones

PEI

Polyetherimides

PAEK

Polyaryletherketones

PAES

Polyarylethersulphones

Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing oxygen or oxygen and carbon, not provided for in groups C08G 2/00 - C08G 65/00
Definition statement

This place covers:

  • Copolymers of carbon monoxide and aliphatic unsaturated compounds
  • Polyanhydrides
Copolymers of carbon monoxide and aliphatic unsaturated compounds
Definition statement

This place covers:

Polyketones made by reaction of from carbon monoxide with aliphatic unsaturated compounds

References
Limiting references

This place does not cover:

Polyetherketones made by Friedel-Krafts acylation

Polyaryletherketones

Polyanhydrides
Definition statement

This place covers:

Polymers containing the following repeat unit:

media10.jpg
media10.jpg
.

Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule (products obtained from isocyanates or isothiocyanates C08G 18/00; polyamide-imides C08G 73/14)
Definition statement

This place covers:

Polyamides derived from

amino-carboxylic acids, e.g. alpha-amino-carboxylic acids

lactams, e.g. beta-lactams

from polyamines and polycarboxylic acids

Pyrrolidones or piperidones

Polyester-amides

Preparations of above polymers

Post-polymerisation treatment or polymers modified by chemical after-treatment

References
Limiting references

This place does not cover:

Products obtained from isocyanates or isothiocyanates

Polysuccinimides

Polyamide-imides

Artificial filaments or fibres

Treatment of textiles

Synonyms and Keywords

In patent documents, the following words/expressions are often used as synonyms:

  • "Polycaprolactam" and "Nylon 6"
  • "Aramid" and "aromatic polyamide"
Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G 12/00 - C08G 71/00 {(polycarbodiimides prepared from isocyanates C08G 18/025, C08G 18/797)}
Definition statement

This place covers:

Polyamines, e.g. polyethyleneimines

Polyhydrazides, polytriazoles, polyamino-triazoles or polyoxadiazoles

Polyimides, polyester-imides or polyamide-imides

Unsaturated polyimide precursors

Polybenzimidazoles

Polybenzoxazoles

References
Limiting references

This place does not cover:

Polycarbodiimides prepared from isocyanates

Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule, derived from five-membered heterocyclic compounds, containing one nitrogen atom in the ring

Polythiazoles

Special rules of classification

The IPC group C08G73/04 is not used, group C08G 73/0206 or subgroups are used instead.

Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
Definition statement

This place covers:

Polymers where there is a Si atom in the main chain; they are referred to with the MDTQ nomenclature.

Relationships with other classification places

Compositions of polymers containing Si in the main chain and other polymers are classified in C08L 83/00.

Coating of polymers containing Si in the main chain are classified in C09D 183/00 and adhesives of polymers containing Si in the main chain are classified in C09J 183/00.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Application for medical or pharmaceutical purposes

Application in cosmetics

Application in layered products

Application to construction materials

Preparation of aqueous siloxane emulsions

Manufacturing of foams

Compounding ingredients

Compositions of polymers of other C08L groups

Application of siloxanes as pressure sensitive adhesives, i.e. PSA

Release coating composition on which the PSA is applied

Treating fibres and yarns

Application in optical articles, optical parts, e.g. contact lenses

Application in semiconductors e.g. as dielectric layer or encapsulation

Special rules of classification

When classifying within this group, a distinction has to be made structurally between polysilicates and siloxanes which contain Si-R groups, such as polymers, which contain only D-units, or resins which contain at least one branching unit such as T or Q.

Polysilicates are in C08G 77/02, all kind of other polymers or resins are in C08G 77/04 or its sub-groups.

It is obligatory to add the following additional indexing codes (CAA) where applicable:

  • C08G 77/70 for every document which uses the MDTQ nomenclature in the claims or the examples
  • C08G 77/80 for polysiloxanes having aromatic substituents such as phenyl side groups.
Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Condensation cure

The cure is established via condensation reactions such as Si-OR + HO-Si → Si-O-Si or Si-OH + HO-Si → Si-O-Si, e.g. HOMDxMOH + (RO)3SiR → elastomer which is performed with the help of a variety of condensation catalysts, e.g. tin compounds, acids or bases.

Curing systems

The three most important ways to harden or cure siloxanes are hydrosilation-, condensation- or radical cure

Hydrosilation cure

The cure is established via the hydrosilation (or hydrosilylation or addition) reactionSi-CH=CH2 + H-Si → Si-CH2-CH2-Si , e.g. ViMDxMVi + MDH 3DxM → elastomeric material (3d x-linked), which is done in most cases with the help of a platinum catalyst, e.g. platinic acid, platinum compounds or Karstedt catalyst.

MDTQ nomenclature

The so called MDTQ nomenclature exists to facilitate the description of siloxane molecules.

media13.png
where R is an organic group O is an oxygen connected to other silicon atomsM (R3SiO1/2 ) stands for monofunctional unit , i.e. monofunctional with respect to the connection to other Si atoms D (R2SiO2/2= R2SiO) is difunctional, T (RSiO3/2) trifunctional and Q (SiO4/2= SiO2) is tetrafunctional

MDTQ-resin

Contain all four elements

MQ-resin

A resin which contains M and Q units, i.e. prepared from tetraalkoxysilanes, e.g. TEOS and monoalkoxysilanes

Radical or peroxide cure

The cure is established via the reaction Si-CH3 + CH3-Si → Si-CH2-CH2-Si which is done in most cases with the help of a peroxide catalyst.

Silsesquioxane

Resin which falls under the stochiometric formula RSiO3/2 (silsesqui means one and a half), e.g. a T-resin

T-resin

A branched structure which contains only T-units, i.e. is prepared from trialkoxysilanes or trichlorosilanes

Synonyms and Keywords

Polysiloxanes with organic subsitiuents on the Si-O backbone are also commonly referred to in the literature as "polyorganosiloxanes" and "organopolysiloxanes". The terms "siloxanes" and "silocones" are also commonly encountered for these compounds.

MDxM

Non functional PDMS, i.e. polydimethylsiloxane

MM

Hexamethyldisiloxane

ViMDxMVi

PDMS having vinyl end groups

MDHxDxM

PDMS having SiH side groups

In patent documents the following expressions

"platin+" or" karstedt" are often used as synonyms when searching for "platinum catalyst";

((alkoxy 2d cur+), (condens+ 2d cur+), tin+, stannous+ or (moisture 2d cur+)) are often used as synonyms when searching for condensation catalysts;

perox+ is often used when searching for radical or peroxide catalysts

Polysilicates
Definition statement

This place covers:

Polymers containing Si in the main chain where only Q groups are present, with no organic groups attached to the siloxane backbone, e.g. synthesis of polymers or gels via tetraethoxy orthosilicate (TEOS) condensation reactions.

References
Limiting references

This place does not cover:

Synthesis of silica particles

Polysiloxanes
Definition statement

This place covers:

Polysiloxanes, i.e. at least one M, D or T group present, e.g. T-resins, MQ-resins, D-polymers or silsesquioxanes, with more than 25 silicon atoms.

Special rules of classification

This group is used when a no more relevant group can be found.

{containing less than 25 silicon atoms}
Definition statement

This place covers:

Polysiloxanes with at least five silicon atoms present, e.g. cyclosiloxanes, polyhedral silsesquioxane (POSS, T​8 cubes), or oligomers.

References
Limiting references

This place does not cover:

Polysiloxanes containing fewer than five units

Equilibration processes
Definition statement

This place covers:

Processes referred to as redistribution, polymerization-deploymerizatiohn, resizing.

containing silicon bound to oxygen-containing groups {(C08G 77/045 takes precedence)}
Definition statement

This place covers:

Polysiloxanes where the O atom is present in the substituents and not the backbone, e.g. direct or no direct silicon to oxygen bonding, epoxy groups, glycol or glycerol, polyhydric alcohol substituents or carbinols, i.e.

Si-CH2-OH

Special rules of classification

C08G 77/045 takes precedence over this group.

to hydroxyl groups
Definition statement

This place covers:

HO-PDMS-OH or condensed siloxane resins of the form RSiOxOHy having Si-OH groups.

to alkoxy or aryloxy groups
Definition statement

This place covers:

RO-PDMS-OR or condensed siloxane resins of the form RSiOxORy having Si-OR alkoxy groups.

containing silicon bound to unsaturated aliphatic groups {(C08G 77/045 takes precedence)}
Definition statement

This place covers:

Polysiloxanes containing silicon bound to unsaturated aliphatic groups, e.g. vinyl or (meth)acrylate.

Special rules of classification

C08G 77/045 takes precedence over this group.

nitrogen-containing groups
Definition statement

This place covers:

Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen, e.g. isocyanates or oximes

Post-polymerisation treatment ({C08G 77/045 takes precedence} chemical after-treatment C08G 77/38)
Definition statement

This place covers:

Physical post-polymerisation treatments which result in no change in length of polysiloxane backbone

References
Limiting references

This place does not cover:

Chemical after-treatment

Special rules of classification

C08G 77/045 takes precedence over this group.

Polysiloxanes modified by chemical after-treatment {(C08G 77/045 takes precedence)}
Definition statement

This place covers:

Polysiloxanes modified by chemical after-treatment which result in no change in length of polysiloxane backbone, but in polysiloxanes having substituents to be specified in sub-groups

Special rules of classification

C08G 77/045 takes precedence over this group.

Block-or graft-polymers containing polysiloxane sequences (polymerising aliphatic unsaturated monomers on to a polysiloxane C08F 283/12)
Definition statement

This place covers:

Preparation of block- or graft-polymers starting from a pre-existing polysiloxane backbone.

References
Limiting references

This place does not cover:

Polymerising aliphatic unsaturated monomers on to a polysiloxane

containing only polysiloxane sequences
Definition statement

This place covers:

Preparation of block- or graft-polymers containing only polysiloxane sequences, e.g. from a MQ siloxane resin cocondensed with a D siloxane polymer.

containing polyurethane sequences
Definition statement

This place covers:

Preparation of block- or graft-polymers containing polyurethane sequences, e.g. urethane-urea type copolymers.

by carbon linkages {(C08G 77/485 takes precedence)}
Definition statement

This place covers:

Polymers where there is a Si atom in the main chain in which at least two but not all the silicon atoms are connected by carbon linkages, e.g. vinyl endblocked PDMS is reacted with Si-H endblocked PDMS in a stochiometric ratio of >1:1 so that defined macromolecular species are build:

2 ViMDxMVi + HMDxMHViMDxMCH2 - CH2MDxMCH2 - CH2MDxMVi

or the analog reaction scheme with α,ω vinyl endcapped aliphatic hydrocarbons:

ViRVi + HMDxMHViR CH2-CH2MDxMCH2-CH2RVi with R being an aliphatic hydrocarbon

Special rules of classification

C08G 77/485 takes precedence over this group.

containing aromatic rings
Definition statement

This place covers:

Polymers where there is a Si atom in the main chain in which at least two but not all the silicon atoms are connected by carbon linkages containing aromatic rings, e.g.

ViRVi + HMDxMHViR CH2-CH2MDxMCH2-CH2RVi with R being an aromatic hydrocarbon.

Metal-containing linkages {(C08G 77/485 takes precedence)}
Definition statement

This place covers:

Polymers where there is a Si atom in the main chain in which at least two but not all the silicon atoms are connected by metal-containing linkages, e.g. silane co-condensation with Ti, Al or Zr alkoxides

Special rules of classification

C08G 77/485 takes precedence over this group.

in which all the silicon atoms are connected by linkages other than oxygen atoms
Definition statement

This place covers:

Polymers where there is a Si atom in the main chain in which all the silicon atoms are connected by linkages other than oxygen atoms, e.g. polysilanes or polysilcarbenes

Nitrogen atoms
Definition statement

This place covers:

Polymers where there is a Si atom in the main chain in which all the silicon atoms are connected by nitrogen atoms, e.g. polysilazanes

Polyphosphazenes
Definition statement

This place covers:

Polyphosphazenes are with the repeat unit

-(-RR'P=N-)-n

Phosphorus linked to oxygen or to oxygen and carbon
Definition statement

This place covers:

Polyphosphates

Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers (involving only carbon-to-carbon unsaturated bond reactions C08F 299/00 {; polyester-amides C08G 69/44; polyester-imides C08G 73/16; polyamides-imides C08G 73/14; block- or graft polymers containing polysiloxane sequences C08G 77/42})
Definition statement

This place covers:

Block copolymers obtained by inter-reacting at least two preformed polymers in the absence of monomers.

Relationships with other classification places

Relationship between C08G 81/00 and C08F 299/00

C08F 299/00 refers to macromolecular compounds obtained by inter-reacting polymers involving only carbon-to-carbon unsaturated bond reactions.

C08G 81/00 refers to macromolecular compounds obtained by inter-reacting polymers involving reactions other than carbon-to-carbon unsaturated bond reactions.

References
Limiting references

This place does not cover:

Crosslinking of polymers, i.e. crosslinked macromolecular products obtained by inter-reacting two polymers

Intercrosslinking of at least two polymers

Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers

Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers; Coatings or adhesives compositions thereof

Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds;Compositions of derivatives of such polymers; Coatings or adhesives compositions thereof

Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L 23/00 - C08L 53/00

Informative references

Attention is drawn to the following places, which may be of interest for search:

Polyester-amides

Polyamides-imides

Polyester-imides

Block- or graft polymers containing polysiloxane sequences

Involving only carbon-to-carbon unsaturated bond reactions

at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
Definition statement

This place covers:

Block or graft polymers containing sequences of polymers of C08F or C08C and of polymers of C08G.

{containing sequences of polymers of conjugated dienes and of polymers of alkenyl aromatic compounds}
Definition statement

This place covers:

Block or graft copolymers obtained by coupling polymers containing sequences of conjugated dienes and of polymers containing vinyl aromatic monomers, e.g. SBR.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Block or graft polymers containing sequences of polymers of C08C or C08F and of polymers of C08G

Macromolecular compounds obtained by inter-reacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from polysiloxanes

Compositions of graft copolymers

Compositions of block copolymers

Compositions of unspecific macromolecular , obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds

{Block or graft polymers containing sequences of polymers of C08C or C08F and of polymers of C08G}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Macromolecular compounds obtained by inter-reacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from polysiloxanes

Compositions of unspecific macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds

{containing polyether sequences}
Definition statement

This place covers:

Block or graft polymers containing sequences of polymers of C08F or C08C and polyether.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Macromolecular compounds obtained by inter-reacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from polyurethanes

{containing polyester or polycarbonate sequences}
Definition statement

This place covers:

Block or graft polymers containing sequences of polymers of C08F or C08C and polyester or polycarbonate.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Macromolecular compounds obtained by inter-reacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polyesters

Macromolecular compounds obtained by inter-reacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from polyurethanes

{containing polyamide sequences}
Definition statement

This place covers:

Block or graft polymers containing sequences of polymers of C08F or C08C and polyamides

Macromolecular compounds not provided for in groups C08G 2/00 - C08G 81/00
Definition statement

This place covers:

Unusual or so-called "exotic" polymers, including polymers not only of C08G, but also of C08F.

Special rules of classification

In this group are classified documents not provided in any of the (sub)groups of C08G or C08F.

{Macromolecular compounds containing organic and inorganic sequences, e.g. organic polymers grafted onto silica}
Definition statement

This place covers:

Macromolecular compounds containing organic and inorganic sequences, e.g. organic polymers grafted onto silica.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Compositions of graft polymers in which the polymer, which is obtained by reactions only involving carbon-to-carbon unsaturated bonds, is grafted on to inorganic particles.

Coating compositions based on compositions of graft polymers of C08L 51/10.

Adhesive compositions based on compositions of graft polymers of C08L 51/10.

{Dendritic macromolecules}
Definition statement

This place covers:

all types of dendritic polymers not classified already in C08G 83/003 and C08G 83/005, such as

i) linear dendritic polymers

ii) dendrigraft polymers

iii) star-hyperbranched polymers

iv) hypergraft polymers.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

(see corresponding note under C08G 83/003 or C08G 83/005):

Medicinal preparations in nanocapsules made of organic macromolecular compounds; dendrimers

Medicinal preparations characterised by the non-active ingredients used, where the non-active ingredient is chemically bound to the active ingredient; starburst conjugates, dendrimers or cascade conjugates.

Preparations for testing in vivo; nuclear magnetic resonance (NMR) characterised by the carrier; debdrimers, dendrons, hyperbranched compounds

Catalysts containing polymer immobilised coordination complexes; e.g. PEG or dendrimer, i.e. molecular weight enlarged complexes

Compositions of unspecified macromolecular compounds containing dendritic macromolecules

Coating compositions of unspecified macromolecular compounds containing dendritic macromolecules

Coating compositions of unspecified macromolecular compounds containing dendritic macromolecules

Special rules of classification

Dendritic polymers are materials with a highly branched structure. Dendritic polymers are characterised by structure and not by chemical nature. Since this particular technical field is growing rapidly, and the classification scheme cannot keep its pace with the developments, in the absence of a more suitable place, all types of dendritic polymers are classified in C08G 83/002 or in one of the subgroups.

Synonyms and Keywords

In patent documents, the following words/expressions are often used as synonyms:

  • "Dendrigraft" and "dendritic polymers"
  • "Hypergraft" and "idem"
{Dendrimers}
Definition statement

This place covers:

Dendrimers; i.e. polymers having a core from which emanates an exponentially increasing number of dendritic branches.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Medicinal preparations in nanocapsules made of organic macromolecular compounds; dendrimers

Use of antigens or antibodies in immunisation

Medicinal preparations characterised by the non-active ingredients used, where the non-active ingredient is chemically bound to the active ingredient; starburst conjugates, dendrimers or cascade conjugates.

Preparations for testing in vivo; nuclear magnetic resonance (NMR) characterised by the carrier; debdrimers, dendrons, hyperbranched compounds

Catalysts containing dendrimers

Catalysts containing polymer immobilised coordination complexes; e.g. PEG or dendrimer, i.e. molecular weight enlarged complexes

Compositions of unspecified macromolecular compounds containing dendritic macromolecules

Coating compositions of unspecified macromolecular compounds containing dendritic macromolecules

Coating compositions of unspecified macromolecular compounds containing dendritic macromolecules

Dendrimers

Special rules of classification

See corresponding note under C08G 83/002.

Synonyms and Keywords

In patent documents, the following words/expressions are often used as synonyms:

  • "Starburst" and "dendrimer"
  • "Arborol(s)", "Dendritic polymer(s)", "Dendron(s)" and "idem"
{Hyperbranched macromolecules}
Definition statement

This place covers:

Hyperbranched polymers; i.e. polymers having a tree-like structure.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Compositions of unspecified macromolecular compounds containing dendritic macromolecules

Coating compositions of unspecified macromolecular compounds containing dendritic macromolecules

Coating compositions of unspecified macromolecular compounds containing dendritic macromolecules

Special rules of classification

See corresponding note under C08G 83/002.

{Polyrotaxanes; Polycatenanes}
Definition statement

This place covers:

Polyrotaxanes; polycatenanes.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Cosmetic or similar toilet preparations containing cyclodextrins

Compositions of polyalkylene oxides

Coating compositions of polyalkylene oxides

Adhesive compositions of polyalkylene oxides

Special rules of classification

A polyrotaxane comprises a linear molecule and cyclic molecules in which the linear molecule is included in cavities of cyclic molecules in a skewered manner, and capping groups, each of which locates at each end of the linear molecule in order to prevent the dissociation of the cyclic molecule.

Synonyms and Keywords

In patent documents, the following words/expressions are often used as synonyms:

  • "Rotaxane(s)" and "polyrotaxane(s)" or "polycatenane(s)"
  • "Catenane(s)", "Cyclodextrin(s)", "Crown ether(s)" and "idem"
{Supramolecular polymers}
Definition statement

This place covers:

Supramolecular polymers, where the monomer units are held together by reversible secondary interactions in the main chain.

Special rules of classification

Supramolecular polymers are polymeric arrays of monomer units, held together by reversible and highly directional secondary interacting -that is, non-covalent bonds, such as hydrogen bonds.

Synonyms and Keywords

In patent documents, the following words/expressions are often used as synonyms:

  • "Self-assembling polymer(s)" and "supramolecular polymer(s)"
General processes for preparing compounds provided for in this subclass
Definition statement

This place covers:

Processes for treating polymers not classified in any of C08G or C08F groups.

Special rules of classification

C08F is referred to in this group because there is no group under C08F corresponding to C08G 85/00. So although it would in principle not appear correct to classify here post- or after-treatment of such polymers (C08F), which have not already been classified elsewhere, a place must in practice be found here for such documents.

{Post-polymerisation treatment}
Definition statement

This place covers:

Post-polymerisation treatment of polymers not classified in any of C08G or C08F groups.

{Modification of polymers by chemical after-treatment}
Definition statement

This place covers:

After-treatment of polymers, not classified neither in C08G nor C08F, by chemical modification.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

After treatment of condensation or polyaddition polymers

Chemical modification of membranes

After treatment of addition polymers, e.g. obtained by reactions involving polymers obtained by reactions involving carbon to carbon unsaturated bonds or purification

Recovery or working-up of waste polymers

{Scale prevention in polymerisation reactors}
Definition statement

This place covers:

preventing the deposition of scale in polymerisation reactors.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Scale prevention in a polymerisation reactor or its auxiliary parts

{Cleaning reaction vessels using chemicals (mechanical methods B08B 9/08)}
Definition statement

This place covers:

Cleaning reaction vessels with chemicals, e.g. polymerisation reactors or extruders.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Mechanical methods

Cleaning extruder parts