专利详情

专利名称	Bi-component catalyst system for isoprene or butadiene cis 1, 4-polymerization and polymerization process
申请号	US20090747490	专利类型	US
公开（公告）号	US8394901(B2)	公开（授权）日	2013.03.12
申请（专利权）人	中国科学院长春应用化学研究所	发明（设计）人	CUI DONGMEILIU XINLILIU DONGTAOGAO WEILI SHIHUIWANG LINGFANGZHANG ZHICHA
主分类号	C08F4/44	IPC主分类号	C08F4/44;B01J31/00;B01J31/26;C08F4/52
专利有效期	Bi-component catalyst system for isoprene or butadiene cis 1, 4-polymerization and polymerization process 至Bi-component catalyst system for isoprene or butadiene cis 1, 4-polymerization and polymerization process	法律状态
说明书摘要	An isoprene or butadiene cis 1,4-selective polymerization catalyst system together with its polymerization method is provided. This catalyst system is composed of NCN-imine pincer type rare earth metal complex of formula [2,6-(CH N—R1)2-4-R2-1-C6H2]LnX2(THF)n and alkylating reagent. In an hydrocarbon solvent or under bulk conditions, at a polymerization temperature in a range of?20-120° C., the conjugated diene is polymerized by using the catalyst system, to produce polyisoprene and polybutadiene having controllable number-average molecular weight, molecular weight distribution of 3.0 or less than, and cis 1,4-content of 95% or more, even 99% or more. The crude rubber and vulcanized rubber of the polyisoprene have high strength, stretching crystallization capability and transparency.