CPC Definition - Subclass C08C
This place covers:
- Processes directed to natural rubber or to conjugated diene rubber.
- Treatment of diene rubber.
- Chemical modification of diene rubber, e.g. chemical reaction on the chain end after living polymerization.
Homopolymers or copolymers of dienes are classified in C08F 36/00, C08F 136/00 or C08F 236/00.
Attention is drawn to the following places, which may be of interest for search:
Post-polymerisation treatment of addition polymers other than dienes | |
Chemical modification of addition polymers other than dienes | |
Preparation of living diene homopolymers or copolymers using anionic catalysts | |
Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F 36/00, e.g. graft polymers | |
Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers or coupled polymers, in which one or more of the polymers is obtained by reactions involving only carbon-to-carbon unsaturated bonds | |
Compositions of natural rubber | |
Compositions of rubber derivatives, e.g. modified rubber | |
Compositions of rubbers not provided for in groups C08L 7/00 - C08L 17/00, e.g. rubber characterised by functional groups or telechelic diene polymers | |
Compositions of copolymers of ethene-propene or ethene-propene-diene, e.g. EPM or EPDM rubber | |
Compositions of copolymers of isobutene, e.g. with minor parts of conjugated dienes monomers; Butyl rubber; Homopolymers of copolymers of other iso-olefins | |
Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds, e.g. unconjugated diene polymers; Compositions of derivatives of such polymers |
In this place, the following terms or expressions are used with the meaning indicated:
diene rubber | homopolymer or copolymer of compounds having as the major part one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds |
In patent documents, the following abbreviations are often used:
BR | Butadiene rubber |
CR | Chloroprene rubber |
EPM or EPDM | Ethene-propene or ethene-propene-diene rubber |
IIR | Isobutylene isoprene rubber or butyl rubber |
IR | Isoprene rubber |
NBR | Nitrile butadiene rubber or acrylonitrile-butadiene rubber |
NR | Natural rubber |
SBR | Styrene butadiene rubber |
This place covers:
- Chemical or physical treatment of rubber latex before or during concentration, e.g. purifying, deproteinising, preserving or concentrating of rubber latex.
- Coagulation of rubber latex.
Attention is drawn to the following places, which may be of interest for search:
Use of inorganic or non-macromolecular organic substances as compounding ingredients, e.g. preserving ingredients |
This place covers:
Treatment of rubber solutions, e.g. by purification, removal of catalyst residues or winning of rubber from the rubber solutions.
This place covers:
Treatment of coagulated rubber, e.g. by purification.
This place covers:
Chemical modification of rubber after polymerisation, e.g. hydrogenation, oxidation, depolymerisation, isomerisation, cyclisation, incorporation of halogen, sulphur, nitrogen, phosphorus, silicon or metal atoms into the molecule, reaction with compounds containing carbon-to-carbon unsaturated bonds or addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule.
Attention is drawn to the following places, which may be of interest for search:
Use of inorganic or non-macromolecular organic substances as compounding ingredients, e.g. using crosslinking agents |
In C08C 19/00 - C08C 19/44, the last place rule is not applied. A process is classified at all appropriate places.
This place covers:
Processes directed to the addition of a reagent which reacts with a hetero atom or a group containing heteroatoms of the macromolecule containing metal atoms exclusively at one or both ends of the macromolecule, e.g. chemical reaction on the chain end after living polymerisation.
In this place, the following terms or expressions are used with the meaning indicated:
heteroatoms | refers to atoms at the end of the macromolecular chain that are not carbon or hydrogen. Metals are also heteroatoms. |