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
Homo- or copolymers of dienes are classified in C08F 36/00, C08F 136/00, C08F 236/00.
This place does not cover:
Post-polymerisation treatment of addition polymers other than dienes | |
Chemical modification of addition polymers other than dienes | |
Preparation of living diene homo- or copolymers using anionic catalysts | |
Graft polymers | |
Coupling of polymers | |
Compositions of diene rubbers | |
Compositions of modified rubber | |
Compositions of rubber characterised by functional groups, e.g. telechelic diene polymers | |
Compositions of copolymers of ethene-propene or ethene-propene-diene, e.g. EPM or EPDM rubber | |
Compositions of copolymers of isobutene with minor part of conjugated dienes monomers, e.g. butyl rubber | |
Compositions of unconjugated diene polymers |
The IPC group C08C1/16 is covered by C08C 1/14.
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 | Butyl rubber |
IR | Isoprene rubber |
NBR | 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, preservation of rubber latex or concentrating
Coagulation
Attention is drawn to the following places, which may be of interest for search:
Preserving ingredients |
This place covers:
Treatment of rubber solutions, e.g. by purification, removal of catalyst residues or wining of rubber from solutions.
This place covers:
Treatment of coagulated rubber, e.g. by purification
This place covers:
Chemical modification of rubber, 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:
Crosslinking agent, other than provided for by group C08C 19/30 |
In C08C 19/00 - C08C 19/44, in the absence of an indication to the contrary a process is classified in the last appropriate place.
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 skeleton, i.e. chemical reaction at the end of polymerchains prepared by living polymerization.
In this place, the following terms or expressions are used with the meaning indicated:
Heteroatoms | Refers to any atoms at the end of the skeleton chain not being carbon or hydrogen. Metals are also hetero-atoms. |