C08CTREATMENT OR CHEMICAL MODIFICATION OF RUBBERSThis subclass covers: processes directed to natural rubber or to conjugated diene rubbers
processes directed to rubbers in general. The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: C08C1/16 covered by C08C1/14 C08C1/00 C08C1/00Treatment of rubber latex C08C1/02Chemical or physical treatment of rubber latex before or during concentration C08C1/04PurifyingDeproteinising C08C1/06Preservation of rubber latex C08C1/065Increasing the size of dispersed rubber particles C08C1/07characterised by the agglomerating agents used C08C1/075Concentrating C08C1/08with the aid of creaming agents C08C1/10by centrifugation C08C1/12by evaporation C08C1/14Coagulation C08C1/145Heat-sensitising agents C08C1/15characterised by the coagulants used C08C2/00Treatment of rubber solutions C08C2/02Purification C08C2/04Removal of catalyst residues C08C2/06Wining of rubber from solutions C08C3/00Treatment of coagulated rubber C08C3/02Purification C08C4/00Treatment of rubber before vulcanisation, not provided for in groups C08C1/00 - C08C3/02 C08C19/00Chemical modification of rubberIn the absence of an indication to the contrary a process is classified in the last appropriate place C08C19/02Hydrogenation C08C19/04Oxidation C08C19/06Epoxidation C08C19/08Depolymerisation C08C2019/09Metathese C08C19/10IsomerisationCyclisation C08C19/12Incorporating halogen atoms into the molecule C08C19/14by reaction with halogens C08C19/16by reaction with hydrogen halides C08C19/18by reaction with hydrocarbons substituted by halogen C08C19/20Incorporating sulfur atoms into the molecule C08C19/22Incorporating nitrogen atoms into the molecule C08C19/24Incorporating phosphorus atoms into the molecule C08C19/25Incorporating silicon atoms into the molecule C08C19/26Incorporating metal atoms into the molecule C08C19/28Reaction with compounds containing carbon-to-carbon unsaturated bonds graft polymers C08F279/00 C08C19/30Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule C08C19/32reacting with halogens or halogen-containing groups C08C19/34reacting with oxygen or oxygen-containing groups C08C19/36with carboxy radicals C08C19/38with hydroxy radicals C08C19/40with epoxy radicals C08C19/42reacting with metals or metal-containing groups C08C19/44of polymers containing metal atoms exclusively at one or both ends of the skeleton