C08C TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
Introduced: September 1968
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- Subclass:
- TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
Description
C08C covers chemical and physical treatment processes applied to natural or synthetic rubber polymers to alter their properties or performance characteristics. This includes vulcanization, cross-linking, grafting, blending with other polymers or additives, and structural modifications such as halogenation or oxidation. The subclass encompasses both batch and continuous treatment methods intended to improve elasticity, durability, processing behavior, or functional properties of rubber materials. Adjacent classes C08F (macromolecular compound synthesis) and C08L (polymer compositions and blends) are distinguished by focusing on the modification of pre-formed rubber rather than polymerization reactions or final formulated compositions.
Scope Notes
Glossary: diene rubber diene rubbers 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 rubber rubbers any synthetic elastic material whose properties resemble the material obtained from the latex sap of trees, e.g. trees of the genera Hevea or Ficus, or the latex sap per se that can be vulcanised and finished into a variety of products | Limiting references: Treatment of addition polymers other than dienes Chemical modification of addition polymers other than dienes Homo- or copolymers of dienes , , Preparation of living diene homo- or copolymers using anionic catalysts Graft polymers Coupling of polymers Foaming natural rubber 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 Compositions of diene rubbers | Application references: Depolymerisation to the original monomer Crosslinking, e.g. vulcanising, of rubber Crosslinking, e.g. vulcanising, of latex Working-up of waste rubber by depolymerisation or devulcanisation Destructive distillation of waste rubber materials Production of liquid hydrocarbon mixtures from rubber or rubber waste
Related Keywords
5 direct subcodes
Child Classifications
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- C08C 1/00 Treatment of rubber latex
- C08C 19/00 Chemical modification of rubber
- C08C 2/00 Treatment of rubber solutions
- C08C 3/00 Treatment of coagulated rubber
- C08C 4/00 Treatment of rubber before vulcanisation, not provided for in groups