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Butadiene/isoprene copolymer and a method of manufacturing the same 发明申请

2023-07-03 4060 291K 0

专利信息

申请日期 2025-07-11 申请号 JP2003549406
公开(公告)号 JP2005511806A 公开(公告)日 2005-04-28
公开国别 JP 申请人省市代码 全国
申请人 Societe de Michelin Technology599093568; Technique et Societe Michelin Rusherushu anonym599105403
简介 The present invention relates to a process for the preparation random copolymers of butadiene and isoprene, essentially consisting of reacting a catalytic system in the presence of butadiene and isoprene and using, as catalytic system, a system based on at least : -a conjugated diene monomer, -an organic phosphoric acid salt of one or more rare earth metals, -an alkylating agent consisting of an alkylaluminium of the formula AlR3 or HAlR2, and-a halogen donor consisting of an alkylaluminium halide, said salt being in suspension in at least one inert, saturated and aliphatic or alicyclic hydrocarbon solvent, which is included in said catalytic system, and the "alkylating agent : rare earth salt" molar ratio falls within a range of from 1 to 8, and performing the copolymerization reaction in an inert hydrocarbon polymerisation solvent or without solvent. These copolymers are in particular such that the butadiene and isoprene units which they comprise each have an elevated content of cis-1, 4 linkages.


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