| 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. |
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