Compositions of macromolecular compounds, either with other macromolecular compounds or with other ingredients, including compositions of polysaccharides, rubbers or natural macromolecular compounds.

The use of macromolecular substances as compounding ingredients.

The above compositions and uses may involve macromolecular substances obtained by reactions which may or may not involve only carbon-to-carbon unsaturated bonds and compositions.

C08L is the technical field for compositions of polymers. In general, compositions of single polymers in solution are classified in C08L, unless otherwise mentioned in specific groups.

Compositions of single polymers with organic or inorganic additives are classified in C08K.

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.

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.

Relationship between C08F, C08G, C08L, C09D and C09J

Polymers as such are classified in C08F or C08G. Polymers compositions are classified in C08L. Coating compositions or adhesive compositions are classified in C09D and C09J respectively.

C09D and C09J are seen as "related fields" of C08L which should be considered when classifying or searching for a document.

For classification:

For searching: Both C08L and C09D subclasses should be searched, regardless of the wording of the claims about a coating, since documents classified in C08L may have information relating to the use of the composition for coating.

These rules apply in analogy for the adhesive compositions of C09J and the related C08L.

Biocidal, pest repellant, pest attractant, or plant growth regulatory activity of chemical compounds or preparations is further classified in A01P.

Therapeutic activity of macromolecular compounds is further classified in subclass A61P.

The use of cosmetics or similar toilet preparations is further classified in subclass A61Q.

References C08F, C08G, D06 are non-limiting in the subclass C08L. CPC will be updated/corrected once this inconsistency in IPC is resolved.

Classification guidance:

Allocation of indexing codes:

Orthogonal symbols C08L 2666/00 - C08L 2666/86 are not used for classification after April 2012. However, they can be used for C-Sets searches for the documents classified prior to Aril 2012. See C-sets search below.

In this subclass, C-Sets classification is applied to the following groups, listed in the table below, if the document discloses a pertinent combination of technical features that cannot be covered by the allocation of a single symbol. The fourth column of the table indicates the place where the detailed information about the C-Sets construction and the associated syntax rules can be found, in the definition section "Special rules of classification".

The specific C-Sets rule is located at only one place of the base symbol in the section "Special rules of classification" in the definition. If the C-Sets rule is applicable to all groups of a subclass, it is located at the subclass level only. If the same C-Sets rule is applicable to multiple groups or subgroups within the same subclass, the C-Sets rule is placed at the highest group or subgroup of the multiple groups.

#C8La (Si): A composition comprising, in descending amounts by weight, a polyester in accordance with C08G 63/02, an amine-substituted polysiloxane in accordance with C08G 77/26 and an epoxy-substituted polysiloxane in accordance with C08G 77/14 is classified as (C08L 67/02, C08L 83/08, C08L 83/00) and in C08G 77/14(ADD) and C08G 77/26 (ADD).

#C8Lb(Si): A composition comprising, in descending amounts by weight, a polyester in accordance with C08G 63/02, an amine-substituted polysiloxane in accordance with C08G 77/26 and an epoxy-substituted polysiloxane in accordance with C08G 77/14 and carbon black is classified as (C08L 67/02, C08L 83/08, C08L 83/00, C08K 3/04) and in C08G 77/14 (ADD) and C08G 77/26 (ADD).

Also see C08L 83/00 for more examples of compositions comprising Si-containing polymers.

C-Sets search queries may be made according to C-Sets classification rules described in C08L, C08L 83/00 and related subclasses e.g. C09D and C09J.

In addition, Search rule #C8Lz, #C9Dz (see C09D), and #C9Jz (see C09J) may be followed to search for polymers in documents classified prior to April 2012.

To search a composition of two polymers, build search queries as follows:(C08L of the polymer in majority, C08L 2666/00 - C08L 2666/26).

The subsequent symbol refers to the appropriate subgroup of C08L 2666/02 - C08L 2666/26 according to the last place rule.

The search statement can also be further refined by searching the polymer in minority by using its C08L as ADD (for documents classified between 2003 and April 2012).

In the case where two polymers are present in equal amounts (50:50), either polymer can be treated as majority, build to two C-Sets search queries wherein either polymer as majority.

Example 1: A composition comprising polystyrene in majority (C08L 25/06) and polyester (Polycaprolactone) (C08L 2666/18) in minority

Example 2: A composition comprising polystyrene in majority (C08L 25/06) and polymethylmethacrylate (C08L 2666/04) in minority.

#C8Lz search rules do not apply when polysiloxane is in majority and when there is a second polysiloxane, C08L 83/00 is used as subsequent symbol(s) in that case.

Example 3: A composition comprising epoxy functional polysiloxane (C08L 83/06) in majority and polydimethylsiloxane in minority (C08L 83/00).

To search for a composition of three or more polymers, build search queries as follows: (C08L of the polymer in majority, an appropriate subgroup of C08L 2666/02 - C08L 2666/26) and C08L 2205/03 (ADD)

The search statement can also be further refined by searching the polymers in minority by using their C08L as ADD for documents classified between 2003 and April 2012.

In the case of a composition of three or more polymers, the subsequent symbol is taken from the group of C08L 2666/00 - C08L 2666/26 that covers all minority polymers.

Example 4: A composition comprising polystyrene in majority (C08L 25/06) and polyester (Polycaprolactone) (C08L 2666/18) and polyamide (Nylon) (C08L 2666/20) in minority.

Example 5: A composition comprising polystyrene in majority (C08L 25/06) and polyester (Polycaprolactone) (C08L 2666/18) and natural rubber (C08L 2666/08) in minority.

Compositions of cellulose, modified cellulose or cellulose derivatives corresponding to the following main groups: C08B 1/00 - C08B 17/00

Covalently or ionically crosslinked gels are classified in C08B 15/005 and C08B 15/10 as they are considered as polysaccharide derivatives per se.

Coating compositions based on such polysaccharides are classified in C09D 101/00.

Adhesives or binders based on such polysaccharides are classified in

C09J 101/00.

Last place priority rule:

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

Classification guidance:

Example: Hydrogels of cellulose are classified in C08L 1/02, C08J 3/075 and C08J 2301/02.

The crosslinking process is classified in C08J 3/24 (see definition of C08J 3/00).

Example: Crosslinking of cellulose derivative is classified in C08B 15/005, the composition comprising crosslinked cellulose is classified in C08L 1/08.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: Cellulose acetate in solution is classified in C08L 1/12.

Example 2: A composition consisting of 60 wt.% of microcrystalline cellulose and 40 wt.% of maltodextrin is classified as (C08L 1/04, C08L 3/02).

Example 3: A composition consisting of carboxymethyl cellulose and glycerol (plasticiser) is classified as (C08K 5/053, C08L 1/286) and in C08K 5/0016.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of starch, amylose or amylopectin or of their derivatives or degradation products corresponding to the following groups:

C08B 30/00 - C08B 35/08

Covalently or ionically crosslinked gels are classified in C08B 31/003 as they are considered as polysaccharide derivatives per se.

Coating compositions based on such starches are classified in C09D 103/00.

Adhesives or binders based on such starches are classified in C09J 103/00.

Last place priority rule:

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

Classification guidance:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: Starch acetate in solution is classified in C08L 3/06.

Example 2: A composition consisting of 60 wt.% of crosslinked starch and 40 wt.% of maltodextrin is classified as (C08L 3/04, C08L 3/02) and in C08L 2205/02.

Example 3: A composition consisting of crosslinked carboxymethyl starch and crosslinked glycerol (plasticiser) is classified as (C08K 5/053, C08L 3/08) and in C08K 5/0016.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of polysaccharides, other than cellulose and starch, and their derivatives corresponding to the following groups:

C08B 37/00 - C08B 37/0096

Covalently or ionically crosslinked gels are classified in C08B as they are considered as polysaccharide derivatives per se.

Coating compositions based on such polysaccharides are classified in C09D 105/00.

Adhesives or binders based on such polysaccharides are classified in C09J 105/00.

Last place priority rule:

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

Example: Hydrogels of alginate are classified in C08L 5/04, C08J 3/075 and C08J 2305/04.

Example: Crosslinking of Dextran is classified in C08B 37/0021; the composition comprising crosslinked dextran is classified in C08L 5/02.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: Ethers of cyclodextrin in solution are classified in C08L 5/16.

Example 2: A composition consisting of 60 wt.% of hyaluronic acid and 40 wt.% of maltodextrin is classified as (C08L 5/08, C08L 3/02).

Example 3: A composition consisting of carboxymethyl dextran and glycerol (plasticiser) is classified as (C08L 5/02, C08K 5/053) and in C08K 5/0016.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of natural rubber or natural rubber latex.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Last place priority rule:

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

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: A blend of 60 parts polybutadiene (C08L 9/00) and 40 parts polyamide (C08L 77/00) is classified as (C08L 9/00, C08L 77/00).

Example 2: A blend of 50 parts polybutadiene (C08L 9/00) and 50 parts polyamide (C08L 77/00) is classified as (C08L 9/00, C08L 77/00) and as (C08L 77/00, C08L 9/00).

Example 3: A blend of 60 parts polybutadiene (C08L 9/00), 40 parts natural rubber (C08L 7/00) and 40 parts of silica is classified as (C08L 9/00, C08L 7/00, C08K 3/36).

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of homopolymers or copolymers of chloroprene or latex corresponding to groups C08F 36/16, C08F 36/18, C08F 136/16, C08F 136/18, C08F 236/16 and C08F 236/18

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of rubbers, corresponding to polymers of groups C08F 36/00, C08F 136/00 and C08F 236/00 containing carboxyl groups containing monomers in minority, e.g. acrylic acid or acrylic acid esters.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of rubber derivatives, i.e., e.g. rubber treated according to C08C

An additional symbol in C08C may be given for the treatment.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of reclaimed rubber, i.e., e.g. reuse of unvulcanised or devulcanised rubber.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions comprising vulcanised or crosslinked rubber

Compositions containing rubbers with functional groups e.g. telechelic diene rubbers.

Last place priority rule:

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

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

"rubber" includes:

a. natural or conjugated diene rubbers;

b. rubber in general (for a specific rubber, other than a natural rubber or a conjugated diene rubber, see the group provided for compositions of such macromolecular compounds).

Compositions of rubbers not provided for in groups C08L 7/00 - C08L 19/02.

Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-corresponding to-carbon double bond; Compositions of derivatives of such polymers corresponding to groups C08F 10/00, C08F 110/00 and C08F 210/00.

Paints, inks, varnishes, dyes, polishes, adhesives are classified in C09. Lubricants are classified in C10M.

Detergents are classified in C11D.

Artificial filaments or fibres are classified in D01F.

Textile treating compositions are classified in D06.

Last place priority rule:

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

If the copolymer can be covered by more than one subgroups, the lowest alternative subgroups (last place) is used, i.e. terpolymers of ethylene, acrylic ester and vinyl acetate would be classified in C08L 23/0869 instead of C08L 23/0853 even when vinyl acetate would be present in a higher amount than acrylic ester.

Classification guidance:

Choice of symbol for copolymer

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: A blend of 60 parts polyethylene (C08L 23/06) and 40 parts polyamide (C08L 77/00) is classified as (C08L 23/06, C08L 77/00).

Example 2: A blend of 50 parts polyethylene (C08L 23/06) and 50 parts polyamide (C08L 77/00) is classified as (C08L 23/06, C08L 77/00) and (C08L 77/00, C08L 23/06).

Example 3: A composition based on polyethylene and containing CaCO₃ is classified as (C08K 3/26, C08L 23/06). If this composition contains also a polyamide, then the classification will be (C08L 23/06, C08L 77/00, C08K 3/26).

Example 4: A composition based on a first polyethylene (C08L 23/04) and containing a second polyethylene, a phenol and silica is classified as (C08L 23/04, C08L 23/04, C08K 5/13, C08K 3/36) and in C08L 2205/02.

Example 5: A composition containing a polyamide in majority, a polyester and a polyethylene is classified as (C08L 77/00, C08L 67/00, C08L 23/06) and in C08L 2205/03.

Example 6: Compositions containing two polymers of the same dot group, for example compositions of two ionomers, are characterised by the Indexing Code C08L 2205/025. The complete classification for a compositions of a K+ and a Na+ ionomer therefore would be (C08L 23/0876, C08L 23/0876) and C08L 2205/025. The same applies for compositions of two polymers only distinguished by physical properties (i.e. molecular weight, density etc.).

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

This group should only be used in exceptional cases, i.e. no or too many examples.

This group should only be used in exceptional cases, i.e. no or too many examples.

This group should only be used if there are examples both of polymers of C08L 23/06 or C08L 23/0807 and C08L 23/0846.

Homopolymers can be further characterised by Indexing Codes C08L 2207/062, C08L 2207/066, C08L 2207/068, C08L 2207/07 or C08L 2314/02 - C08L 2314/08.

This group should only be used if there are examples both of polymers of C08L 23/0807 and C08L 23/0846.

C08L 23/16 takes precedence over C08L 23/08.

This group can be further characterised by Indexing Codes C08L 2207/062 - C08L 2207/07 or C08L 2314/02 - C08L 2314/08.

It is preferable to classify in C08L 23/0815 when possible.

This group can be further characterised by Indexing Codes C08L 2207/062 - C08L 2207/07 or C08L 2314/02 - C08L 2207/06 .

When ethylene is in majority, ethylene-propene copolymers are only classified when propene is clearly the minor component, e.g. LLDPE with comonomer propene is classified in C08L 23/0815, whereas EPR is classified in C08L 23/16.

Copolymers of ethene with aliphatic cyclic olefins, e.g. ethylene norbornene copolymers, e.g. TOPAS® or copolymer of ethylene, propene and norbornene

This group takes precedence over C08L 23/0815.

Copolymers of ethylene with aliphatic polyenes, e.g. copolymer of ethene, butene (small amount) and norbornene (smaller amount)

This group takes precedence over C08L 23/0815.

Copolymers of ethene with aromatic monomers , e.g. copolymer of ethene, butene (small amount) and styrene (smaller amount).

This group takes precedence over C08L 23/0815.

Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms, e.g. copolymer of ethylene, butene (small amount) and acrylate (smaller amount).

This group takes precedence over C08L 23/0815.

Copolymers of ethene with saponified vinylacetate, e.g. copolymer of ethylene, vinylaceate (small amount) and vinylalcohol (smaller amount, e.g. partially saponified EVA

This group takes precedence over C08L 23/0853.

Copolymers of ethaneethylene and acids or derivatives, e.g. copolymer of ethene and vinyl sulfonic acids.

C08L 23/0892 takes precedence over this group.

Copolymers of ethylene and carboxylic acid, where H+ is replaced by M+.

This group takes precedence over C08L 23/0892.

In this group, M+ is not regarded as "other atom" in the sense of C08L 23/0892.

Copolymers of ethylene with epoxide containing esters, e.g. glycidyl methacrylate.

This group takes precedence over C08L 23/0869.

Classification in this group can be further characterised by Indexing Codes C08L 2207/10 - C08L 2207/14 or C08L 2314/02 - C08L 2314/08

Homopolymers of propene

Classification in this group can be further characterised by Indexing Codes C08L 2207/10 - C08L 2207/14 or C08L 2314/02 - C08L 2314/08.

Copolymers of propene with the propene in majority, e.g. ethylene-propene copolymers when ethylene is clearly the minor component, i.e. EPR

Rubbery polymers, e.g. high olefin comonomer content, but not propene

Classification in this group can be further characterised by Indexing Codes C08L 2207/10 - C08L 2207/14 or C08L 2314/02 - C08L 2314/08.

C08L 23/16 takes precedence over this group.

This group takes precedence over C08L 23/14 or C08L 23/142 in the case of terpolymers even if the polyene unit is the monomer in the lowest concentration.

This group takes precedence over C08L 23/14 or C08L 23/142 in the case of terpolymers even if the heteroatom carrying unit is the monomer in the lowest concentration.

Polymers comprising both ethylene and propylene on about the same amount.

This group takes precedence over C08L 23/0815 and C08L 23/14;

Although these polymers are rubbers or elastomers, C08L 23/00 or subgroups are used if they not in majority.

C08L 23/0861 takes precedence in the case of saponified EVA. C08L 23/0876 takes precedence in the case of neutralised ethylene carboxylic acid copolymers (iononers).

For chlorosulfonation C08L 23/32 takes precedence over this group.

This group takes precedence over C08L 23/28.

Compositions based on homopolymers or copolymers of compounds corresponding to groups C08F 12/00, C08F 112/00 and C08F 212/00:

Classification guidance:

Classification should be made based on the examples, but not the general claims, in the documents. The use of main group symbol should be avoided if there are subgroups cover the subject matter to be classified.

For example, a document claiming compositions of a polymer of an aromatic vinyl monomer, wherein the examples are limited to e.g. polystyrene, should be classified in C08L 25/06 and not in C08L 25/04, C08L 25/02 or in C08L 25/00

General purpose PS, GPS is classified in C08L 25/06.

High impact polystyrene HIPS is classified in C08L 25/06, unless the rubber or rubber content is of relevance, where it should be classified in C08L 51/04.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on homopolymers or copolymers of compounds corresponding to groups C08F 14/00, C08F 114/00 and C08F 214/00:

Homopolymers or copolymers containing chloride, e.g. of vinyl chloride or of vinylidene chloride.

Homopolymers or copolymers containing bromine or iodine atoms

Homopolymers or copolymers containing fluorine atoms, e.g. of vinyl fluoride,

of vinylidene fluoride, of tetrafluoroethene or of hexafluoropropene.

Homopolymers or copolymers containing halogen, modified or not modified by chemical after-treatment.

Classification Guidance:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of (co)polymers of fluorine containing unsaturated monomers other than those covered by C08L 27/14 - C08L 27/20.

Compositions of (co)polymers of fluorine containing unsaturated monomers having additional halogen atom(s) other than fluorine, e.g. (co)polymers of chlorotrifluoroethene.

Compositions based on homopolymers or copolymers of compounds corresponding to groups C08F 16/00, C08F 116/00 and C08F 216/00:

Homopolymers or copolymers of unsaturated alcohols, e.g. polyvinyl alcohol.

Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids, e.g. copolymers of allyl alcohol.

Homopolymers or copolymers of unsaturated ketones.

Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols.

Classification guidance:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Saponified or hydrolysed (co)polymers of vinyl esters of saturated acids, e.g. saponified or hydrolysed (co)polymers of vinyl acetate.

Copolymers with styrene, even when styrene is in majority.

Compositions based on homopolymers or copolymers of compounds corresponding to groups C08F 18/00, C08F 118/00 and C08F 218/00:

Classification guidance:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on homopolymers or copolymers of compounds corresponding to groups C08F 20/00, C08F 120/00 and C08F 220/00.

Application of macromolecular compositions as biocides, pest-repellants, pest-attractants, or plant growth activity regulators is further classified in subclass A01N.

Paints, inks, varnishes, dyes, polishes, adhesives are classified in C09. Lubricants are classified in C10M.

Detergents are classified in C11D.

Artificial filaments or fibres are classified in D01F.

Textile treating compositions are classified in D06.

Last place priority rule:

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

If there is more than one subgroup that covers the subject matter to be classified, the lowest subgroup (last place) is used. For example, terpolymers of styrene, vinyl acetate and methyl methacrylate in similar proportions would be classified in C08L 33/12 instead of C08L 25/00 or C08L 31/00.

Classification guidance:

Choice of symbol for copolymer:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: A blend of 60 parts polymethyl methacrylate (C08L 33/12) and 40 parts polyamide (C08L 77/00) is classified as (C08L 33/12, C08L 77/00).

Example 2: A blend of 50 parts polymethyl methacrylate (C08L 33/12) and 50 parts polyamide (C08L 77/00) is classified as (C08L 33/12, C08L 77/00) and (C08L 77/00, C08L 33/12).

Example 3: A composition based on polymethyl methacrylate and containing CaCO₃ is classified as (C08K 3/26, C08L 33/12). If this composition contains also a polyamide, then it is classified as (C08L 33/12, C08L 77/00, C08K 3/26).

Example 4: A composition based on a first polymethyl methacrylate (C08L 33/12) and containing as a second polymer a copolymer of acrylic acid, a phenol and silica is classified as (C08L 33/12, C08L 33/02, C08K 5/13, C08K 3/36) and in C08L 2205/02.

Example 5: A composition containing a polyamide in majority, a polyester and a polymethyl methacrylate is classified as (C08L 77/00, C08L 67/00, C08L 33/12) and in C08L 2205/03.

Example 6: A composition containing a blend of a copolymer of acrylic ester, acrylamide and hydroxymethylmethacrylate as main component with polymethyl methacrylate as minor component therefore would be classified as (C08L 33/26, C08L 33/12), even if less acrylamide monomer is present than acrylic ester and hydroxymethylmethacrylate. A separate C-Set in C08F corresponding to the co-monomers of the main polymer is also given (C08F 220/14, C08F 220/26, C08F 220/20).

Example 7: Compositions containing two polymers of the same dot group, for example compositions of two polymers am hydroxyl containing acrylic ester, are characterised by the orthogonal indexing code C08L 2205/025. The complete classification for such a compositions therefore would be (C08L 33/066, C08L 33/066) and C08L 2205/025. The same applies for compositions of two polymers only distinguished by physical properties (e.g. molecular weight, density etc.).

C-Sets searches:

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Groups C08L 37/00 - C08L 43/04, C08L 33/064-C08L 33/068 and C08L 33/14 - C08L 33/26 take precedence over this group, even if the corresponding monomers are in minority; this group should be used if the nature of the acrylic ester polymer is not specified.

Polymers formed from alkyl alkylacrylate monomers.

Acrylic polymers containing maleic acid or an derivative in minority.

Polymers containing for e.g. hydroxy ethyl methacrylate (HEMA).

Polymers containing for e.g. glycidyl methacrylate

C08L 33/08 – C08L 33/12

In C08L 33/08 - C08L 33/12 the only copolymers classified are esters of acrylic acid or methacrylic acid. Other alkylacrylates are classified in C09J 133/06.

All copolymers with other monomers are classified elsewhere.

Groups C08L 37/00 - C08L 43/04, C08L 33/062-C08L 33/068 and C08L 33/14 - C08L 33/26 take precedence over this group even if the corresponding monomers are in minority.

Groups C08L 37/00 - C08L 43/04, C08L 33/062-C08L 33/068 and C08L 33/14 - C08L 33/26 take precedence over this group even if the corresponding monomers are in minority.

Acrylic esters of polyethylene ethers,

Polymers of methoxymethacrylates,

Polymers of amino substitued acrylate esters.

Groups C08L 37/00 - C08L 43/04, C08L 33/062-C08L 33/068 and C08L 33/14 - C08L 33/26 take precedence over this group even if the corresponding monomers are in minority.

Compositions based on homopolymers or copolymers of compounds corresponding to groups C08F 22/00, C08F 122/00 and C08F 222/00

Application of macromolecular compositions as biocides, pest-repellants, pest-attractants, or plant growth activity regulators is further classified in subclass A01N.

Paints, inks, varnishes, dyes, polishes, adhesives are classified in C09. Lubricants are classified in C10M.

Detergents are classified in C11D.

Artificial filaments or fibres are classified in D01F.

Textile treating compositions are classified in D06.

Last place priority rule:

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

Classification guidance:

Choice of symbol for copolymer:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: A blend of 60 parts styrene-maleic anhydride copolymer (C08L 35/06) and 40 parts polyamide (C08L 77/00) is classified as (C08L 35/06, C08L 77/00).

Example 2: A blend of 50 parts styrene-maleic anhydride copolymer (C08L 35/06) and 50 parts polyamide (C08L 77/00) is classified as (C08L 35/06, C08L 77/00) and as (C08L 77/00, C08L 35/06).

Example 3: A composition based on styrene-maleic anhydride copolymer and containing CaCO₃ is classified as (C08K 3/26, C08L 35/06). If this composition contains also a polyamide, then it is classified as (C08L 35/06, C08L 77/00, C08K 3/26).

Example 4: A composition based on a first styrene-maleic anhydride copolymer (C08L 35/06) and containing a second styrene-maleic anhydride copolymer, a phenol and silica is classified as (C08L 35/06, C08L 35/06, C08K 5/13, C08K 3/36) and in C08L 2205/025.

Example 5: A composition containing a polyamide in majority, a polyester and a styrene-maleic anhydride copolymer is classified as (C08L 77/00, C08L 67/00, C08L 35/06) and in C08L 2205/03.

Example 6: Compositions containing two polymers of the same dot group, for example compositions of two styrene-maleic anhydride copolymer polymers, are characterised by the orthogonal indexing code C08L 2205/025. The complete classification for such compositions therefore would be (C08L 35/06, C08L 35/06) and C08L 2205/025. The same applies for compositions of two polymers only distinguished by physical properties (i.e. molecular weight, density etc.)

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Maleic anhydride should be characterised by a further Indexing Code of C08F, e.g. C08F 222/04.

Groups C08L 35/06 and C08L 35/08 take precedence over this group.

Maleic anhydride should be characterised by a further Indexing Code of C08F, e.g. C08F 222/04.

Groups C08L 35/06 and C08L 35/08 take precedence over this group.

Anhydrides, e.g. maleic anhydride, should be optionally classified as well in C08F 222/04 or its indented subgroups - whenever considered relevant.

Maleic anhydride should be characterised by a further Indexing Code of C08F, e.g. C08F 222/04.

Compositions based on homopolymers or copolymers corresponding to groups C08F 24/00, C08F 124/00 or C08F 224/00.

Application of macromolecular compositions as biocides, pest-repellants, pest-attractants, or plant growth activity regulators is further classified in subclass A01N.

Compositions based on polymerisable monomers are classified in C08F 10/00 - C08F 301/00 or C08G.

Paints, inks, varnishes, dyes, polishes, adhesives are classified in C09. Lubricants are classified in C10M.

Detergents are classified in C11D.

Artificial filaments or fibres are classified in D01F.

Textile treating compositions are classified in D06.

Last place priority rule:

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

Classification guidance:

Choice of symbol for copolymer:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: A blend of 60 parts diene vinyl furan copolymer (C08L 37/00) and 40 parts polyamide (C08L 77/00) is classified as (C08L 37/00, C08L 77/00).

Example 2: A blend of 50 parts diene vinyl furan copolymer (C08L 37/00) and 50 parts polyamide (C08L 77/00) is classified as (C08L 37/00, C08L 77/00) and (C08L 77/00, C08L 37/00).

Example 3: A composition based on diene vinyl furan copolymer and containing CaCO₃ is classified as (C08K 3/26, C08L 37/00). If this composition contains also a polyamide, then it is classified as (C08L 37/00, C08L 77/00, C08K 3/26).

Example 4: A composition based on a first diene vinyl furan copolymer (C08L 37/00) and containing a second diene vinyl furan copolymer, a phenol and silica is classified as (C08L 37/00, C08L 37/00, C08K 5/13, C08K 3/36) and in C08L 2205/025.

Example 5: A composition containing a polyamide in majority, a polyester and a diene vinyl furan copolymer is classified as (C08L 77/00, C08L 67/00, C08L 37/00) and in C08L 2205/03.

Example 6: Compositions containing two polymers of the same dot group, for example compositions of two diene vinyl furan copolymer polymers, are characterised by the Indexing Code C08L 2205/025. The complete classification for such compositions therefore would be (C08L 37/00, C08L 37/00) and C08L 2205/025. The same applies for compositions of two polymers only distinguished by physical properties (i.e. molecular weight, density etc.)

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on homopolymers or copolymers corresponding to C08F 26/00, C08F 126/00 and C08F 226/00, as e.g.:

Compositions based on homopolymers or copolymers of compounds corresponding to groups C08F 26/00, C08F 126/00 and C08F 226/00.

Application of macromolecular compositions as biocides, pest-repellants, pest-attractants, or plant growth activity regulators is further classified in subclass A01N.

Paints, inks, varnishes, dyes, polishes, adhesives are classified in C09. Lubricants are classified in C10M.

Detergents are classified in C11D.

Artificial filaments or fibres are classified in D01F.

Textile treating compositions are classified in D06.

Last place priority rule:

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

Classification guidance:

Choice of symbol for copolymer:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: A blend of 60 parts vinyl pyrrolidone copolymer (C08L 39/06) and 40 parts polyamide (C08L 77/00) is classified as (C08L 39/06, C08L 77/00).

Example 2: A blend of 50 parts vinyl pyrrolidone copolymer (C08L 39/06) and 50 parts polyamide (C08L 77/00) is classified as (C08L 39/06, C08L 77/00) and (C08L 77/00, C08L 39/06).

Example 3: A composition based on vinyl pyrrolidone copolymer and containing CaCO₃ is classified as (C08K 3/26, C08L 39/06). If this composition contains also a polyamide, then the classification will be (C08L 39/06, C08L 77/00, C08K 3/26).

Example 4: A composition based on a first vinyl pyrrolidone copolymer (C08L 39/06) and containing a second vinyl pyrrolidone copolymer, a phenol and silica is classified as (C08L 39/06, C08L 39/06, C08K 5/13, C08K 3/36) and C08L 2205/025.

Example 5: A composition containing a polyamide in majority, a polyester and a vinyl pyrrolidone copolymer is classified as (C08L 77/00, C08L 67/00, C08L 39/06) and C08L 2205/03.

Example 6: Compositions containing two polymers of the same .dot group, for example compositions of two vinyl pyrrolidone copolymers, are characterised by the Indexing Code C08L 2205/025. The complete classification for such compositions therefore would be (C08L 39/06, C08L 39/06) and C08L 2205/025. The same applies for compositions of two polymers only distinguished by physical properties (i.e. molecular weight, density etc.)

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on homopolymers or copolymers of compounds corresponding to groups C08F 28/00, C08F 128/00 or C08F 228/00

Application of macromolecular compositions as biocides, pest-repellants, pest-attractants, or plant growth activity regulators is further classified in subclass A01N.

Paints, inks, varnishes, dyes, polishes, adhesives are classified in C09. Lubricants are classified in C10M.

Detergents are classified in C11D.

Artificial filaments or fibres are classified in D01F.

Textile treating compositions are classified in D06.

Last place priority rule:

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

Classification guidance:

Choice of symbol for copolymer:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: A blend of 60 parts acrylic ester vinyl thioethanol copolymer (C08L 41/00) and 40 parts polyamide (C08L 77/00) is classified as (C08L 41/00, C08L 77/00).

Example 2: A blend of 50 parts acrylic ester vinyl thioethanol copolymer (C08L 41/00) and 50 parts polyamide (C08L 77/00) is classified as (C08L 41/00, C08L 77/00) and (C08L 77/00, C08L 41/00).

Example 3: A composition based on acrylic ester vinyl thioethanol copolymer and containing CaCO₃ is classified as (C08K 3/26, C08L 41/00). If this composition contains also a polyamide, then the classification will be (C08L 41/00, C08L 77/00, C08K 3/26).

Example 4: A composition based on a first acrylic ester vinyl thioethanol copolymer (C08L 41/00) and containing a second acrylic ester vinyl thioethanol copolymer, a phenol and silica is classified as (C08L 41/00, C08L 41/00, C08K 5/13, C08K 3/36) and in C08L 77/00.

Example 5: A composition containing a polyamide in majority, a polyester and an acrylic ester vinyl thioethanol copolymer is classified as (C08L 77/00, C08L 67/00, C08L 41/00).

Example 6: Compositions containing two polymers of the same .dot group, for example compositions of two acrylic ester vinyl thioethanol copolymer polymers, are characterised by the orthogonal indexing code C08L 2205/025. The complete classification for such compositions therefore would be (C08L 41/00, C08L 41/00) and C08L 2205/025. The same applies for compositions of two polymers only distinguished by physical properties (i.e. molecular weight, density etc.)

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of homopolymers or copolymers of compounds corresponding to groups C08F 30/00, C08F 130/00 or C08F 230/00.

Compositions based on homopolymers or copolymers of compounds corresponding to groups C08F 30/00, C08F 130/00 or C08F 230/00.

Application of macromolecular compositions as biocides, pest-repellants, pest-attractants, or plant growth activity regulators is further classified in subclass A01N.

Paints, inks, varnishes, dyes, polishes, adhesives are classified in C09. Lubricants are classified in C10M.

Detergents are classified in C11D.

Artificial filaments or fibres are classified in D01F.

Last place priority rule:

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

Classification guidance:

Choice of symbol for copolymer:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: A blend of 60 parts vinyl silane copolymer (C08L 43/04) and 40 parts polyamide (C08L 77/00) is classified as (C08L 43/04, C08L 77/00).

Example 2: A blend of 50 parts vinyl silane copolymer (C08L 43/04) and 50 parts polyamide (C08L 77/00) is classified as (C08L 43/04, C08L 43/04) and (C08L 77/00, C08L 43/04).

Example 3: A composition based on vinyl silane copolymer and containing CaCO₃ is classified as (C08K 3/26, C08L 43/04). If this composition contains also a polyamide, then it is classified as (C08L 43/04, C08L 77/00, C08K 3/26).

Example 4: A composition based on a first vinyl silane copolymer (C08L 43/04) and containing a second vinyl silane copolymer, a phenol and silica is classified as (C08L 43/04, C08L 43/04, C08K 5/13, C08K 3/36) and in C08L 2205/025.

Example 5: A composition containing a polyamide in majority, a polyester and a vinyl silane copolymer is classified as (C08L 77/00, C08L 67/00, C08L 43/04) and in C08L 2205/03.

Example 6: Compositions containing two polymers of the same dot group, for example compositions of two vinyl silane copolymers, are characterised by the Indexing Code C08L 2205/025. The complete classification for such compositions therefore would be (C08L 43/04, C08L 43/04) and C08L 2205/025. The same applies for compositions of two polymers only distinguished by physical properties (i.e. molecular weight, density etc.)

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on homopolymers or copolymers of compounds corresponding to groups C08F 32/00, C08F 132/00, C08F 232/00 or C08F 244/00.

(Co)polymers of cyclic olefins, e.g. norbornene or bicyclopentadiene, where the cyclic monomer is the major component in the copolymer.

Application of macromolecular compositions as biocides, pest-repellants, pest-attractants, or plant growth activity regulators is further classified in subclass A01N.

Paints, inks, varnishes, dyes, polishes, adhesives are classified in C09. Lubricants are classified in C10M.

Detergents are classified in C11D.

Artificial filaments or fibres are classified in D01F.

Last place priority rule:

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

Classification guidance:

Choice of symbol for copolymer:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: A composition based on polynorbornene and containing CaCO₃ is classified as (C08K 3/26, C08L 45/00). If this composition contains also a polyamide, then the classification will be (C08L 45/00, C08L 77/00, C08K 3/26).

Example 2: A blend of 50 parts poly acetylene (C08L 49/00) and 50 parts polyamide (C08L 77/00) is classified as (C08L 49/00, C08L 77/00) and (C08L 77/00, C08L 49/00).

Example 3: A composition containing a polyamide in majority, a polyester and a polynorbornene is classified as (C08L 77/00, C08L 67/00, C08L 45/00) and in C08L 2205/03.

Example 4: Compositions containing two polymers of the same dot group, for example compositions of two coumarone-indene polymers, are characterised by the Indexing Code C08L 2205/025. The complete classification for such compositions therefore would be (C08L 45/00, C08L 45/00) and C08L 2205/025. The same applies for compositions of two polymers only distinguished by physical properties (i.e. molecular weight, density etc.)

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in the C08L subclass definition.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on homopolymers or copolymers of compounds corresponding to groups C08F 38/00, C08F 138/00 and C08F 238/00.

Application of macromolecular compositions as biocides, pest-repellants, pest-attractants, or plant growth activity regulators is further classified in subclass A01N.

Paints, inks, varnishes, dyes, polishes, adhesives are classified in C09. Lubricants are classified in C10M.

Detergents are classified in C11D.

Artificial filaments or fibres are classified in D01F.

Last place priority rule:

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

Classification guidance:

Choice of symbol for copolymer:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: A blend of 60 parts poly-acetylene (C08L 49/00) and 40 parts polyamide (C08L 77/00) is classified in (C08L 49/00, C08L 77/00).

Example 2: A blend of 50 parts poly acetylene (C08L 49/00) and 50 parts polyamide (C08L 77/00) is classified as (C08L 49/00, C08L 49/00) and (C08L 77/00, C08L 49/00).

Example 3: A composition based on polyacetylene and containing CaCO₃ is classified as (C08K 3/26, C08L 49/00). If this composition contains also a polyamide, then the classification will be (C08L 49/00, C08L 77/00, C08K 3/26).

Example 4: A composition based on a first polyacetylene (C08L 49/00) and containing a second polyacetylene, a phenol and silica is classified as (C08L 49/00, C08L 49/00, C08K 5/13, C08K 3/36) and in C08L 2205/03.

Example 5: A composition containing a polyamide in majority, a polyester and a polyacetylene is classified as (C08L 77/00, C08L 67/00, C08L 49/00) and in C08L 2205/03.

Example 6: Compositions containing two polymers of the same dot group, for example compositions of two polyacetylenes, are characterised by the Indexing Code C08L 2205/025. The complete classification for such a compositions therefore would be (C08L 49/00, C08L 49/00) and C08L 2205/025. The same applies for compositions of two polymers only distinguished by physical properties, e.g. molecular weight or density.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on graft polymers corresponding to groups C08F 251/00 - C08F 292/00

Graft copolymers in which the grafted component is obtained by reactions involving C=C per se are classified in C08F 251/00 - C08F 292/00

Coating composition comprising graft polymers are classified in C09D 151/00 - C09D 151/10

Adhesive composition comprising graft polymers are classified in C09J 151/00 - C09J 151/10.

Compositions comprising graft polymers in which the graft polymer is in minority are classified in C08L 51/00 - C08L 51/10.

For compositions comprising grafted rubbers, several groups are given if the rubber is specific.

If the rubber is EPR: C08L 51/04 and C08L 51/06

If the rubber is EPDM, SBR or acrylate rubber: C08L 51/04 and C08L 51/003

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of block polymers of classes C08F 293/00 - C08F 297/08

Compositions based on block polymers corresponding to groups C08F 293/00 - C08F 297/08

Block polymers obtained by reactions only involving C=C per se are classified in C08F 293/00 - C08F 297/08.

Coating compositions comprising block polymers are classified in C09D 153/00 - C09D 153/025.

Adhesive compositions comprising block polymers are classified in

C09J 153/00 - C09J 153/025 .

Compositions comprising block polymers in which the block polymer is in minority are classified in

C08L 53/00 - C08L 53/025.

C08L 53/005 and C08L 53/025 cover compositions comprising modified block polymers. In particular, compositions comprising hydrogenated styrene-diene block copolymers are classified in C08L 53/025.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

C-Sets and C08L classes are used as specified in the Special rules of classification of class C08L.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds which are not limited to a particular polymer type as defined in groups C08L 7/00 - C08L 55/00.

Compositions of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds which are not specific enough as to fit in the preceding groups C08L 7/00 - C08L 55/00.

The use of C08L 57/00 - C08L 57/12 symbols should be avoided by classifying the specific examples, whenever practicable, in the corresponding groups of C08L 7/00 - C08L 55/00.

Classification guidance:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Composition based on polyacetals, which are addition polymers of aldehydes or cyclic oligomers thereof or of ketones and correspond to groups C08G 2/00 - C08G 16/00 and their subgroups.

Attention is drawn to the rules of C-Sets which are explained after the C08L title.

Classification guidance:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on condensation polymers of

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

All compositions comprising epoxy resins and optionally other polymeric or non-polymeric compounds. The emphasis is on the epoxy resins.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

Example 1: A blend of 60 parts non-specified epoxy resin (C08L 63/00) and 40 parts polyamide (C08L 77/00) is classified as (C08L 63/00, C08L 77/00).

Example 2: A blend of 50 parts non-specified epoxy resin (C08L 63/00) and 50 parts Novolak epoxy resin (C08L 63/04) is classified as (C08L 63/00, C08L 63/04), (C08L 63/04, C08L 63/00) and C08L 2205/02.

Example 3: A composition based of a polyepoxide and containing CaCO₃ is classified as (C08K 3/26, C08L 63/00). If this composition contains also a polyamide, then the classification will be (C08L 63/00, C08L 77/00, C08K 3/26).

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on macromolecular compounds obtained by reactions forming a carbon-carbon bond in the main chain other than polymers obtained by reactions only involving the polyaddition of carbon-to-carbon unsaturated bonds (wherein in the latter case the reactive carbon-carbon group stays intact without cleavage of fragments) corresponding to groups C08G 61/00 - C08G 61/12. The compositions comprise either other macromolecular compounds and/or other ingredients.

The use of such macromolecular substances as compounding ingredients is included, as well.

Relationship with other subclasses of classes C08 and C09:

Macromolecular compounds per se obtained by polyaddition reactions only involving carbon-to-carbon unsaturated bonds wherein the reactive carbon-carbon group stays intact without cleavage of fragments are classified in C08F. Compositions based on monomers of such polymers are also classified in C08F.

This main group includes metathesis polymerization products, but it does not include common addition polymers such as polymethylmethacrylate.

Macromolecular compounds obtained by reactions forming a carbon-carbon bond in the main chain other than polymers obtained by reactions only involving the polyaddition of carbon-to-carbon unsaturated bonds are classified in C08G 61/00. Compositions based on monomers of such polymers are also placed in C08G 61/00.

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

Adhesives and adhesive processes are classified in C09J.

Relationship with other main groups of the same subclass C08L:

Compositions based on polymers prepared by condensation reactions of aldehydes or ketones with phenols only are classified in groups C08L 61/04 - C08L 61/16, since C08L 61/00 - C08L 61/34 takes preference. For the same reasons, compositions of condensation polymers of aldehydes or ketones only are put in C08L 61/02. Compositions based on 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. C08L 79/04 for polypyrroles formed from amines and polyketones. Compositions of polyketones are classified in C08L 73/00.

Classification guidance:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on polymers of compounds corresponding to groups C08G 63/00

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on polymers of compounds corresponding to groups C08G 64/00

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on polymers of polyalkylenes oxides, polyethers derived from hydroxy compounds, e.g. PPO

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions containing (-O-R-O-) repeat unit where R is an alkyl group

e.g. polyethylene oxide, polypropylene oxide or polytetrahydrofuran.

Polyalkylene oxides can be made by either ring opening reactions as in C08G 65/02 and C08G 65/26 or much more rarely by a condensation reaction as in C08G 65/34. In either case, compositions of such polymers regardless of the method of synthesis should be classified in C08L 71/02.

Compositions based on polyketones made by reaction of carbon monoxide with unsaturated aliphatic compound.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on polymers of compounds corresponding to groups C08G 18/00 or C08G 71/00

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on polyamides derived from

polyamines and polycarboxylic acids which correspond to subgroup C08G 69/26, e.g. nylon 66,

Group C08L 77/10 takes precedence over C08L 77/02, C08L 77/04 and C08L 77/06.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions of polymers formed by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule not provided for in C08L 61/00 - C08L 77/00.

Examples:

Compositions of:

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions based on polymers corresponding to group C08G 75/00.

In this group, C-Sets (e.g. #C08La, #C8La (Si), #C8Lb, and #C8Lb(Si)) are used. The detailed information about the C-Sets construction and the associated syntax rules are found in the "Special rules of classification" in C08L subclass.

C-Sets search queries may be made according to C-Sets classification rules described in C08L and related subclasses. In addition, #C8Lz, #C9Dz, and #C9Jz Search Rules may be followed to search for polymers in documents classified prior to April 2012.

Compositions containing polymers containing the (S-S)n repeat unit.

Compositions comprising macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only (Si-based macromolecular compounds in the sense of C08G 77/00 or "Si-based polymers" here under), e.g.