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    • 46. 发明授权
    • Method for producing low-molecular, highly reactive polyisobutylene
    • 生产低分子,高活性聚异丁烯的方法
    • US06407186B1
    • 2002-06-18
    • US09581154
    • 2000-06-12
    • Hans Peter RathUlrich KanneFrans van Deyck
    • Hans Peter RathUlrich KanneFrans van Deyck
    • C08F414
    • C08F110/10C08F6/02C08F2/001C08F4/14C08F2/14C08F2500/02C08F2500/03
    • A process for preparing low molecular weight, highly reactive polyisobutylene having an average molecular weight Mn of from 500 to 5000 Dalton and a terminal double bond content of more than 80 mol % by polymerization in the liquid phase of isobutene or hydrocarbon streams comprising isobutane [sic] with the aid of a boron trifluoride complex catalyst at from −40 to 20° C. and at from 1 to 20 bar comprises a) polymerizing until the residual isobutene content of the reaction mixture is less than 2% by weight, based on isobutene introduced, or removing residual isobutene towards the end of the polymerization until the residual isobutene content is less than 2% by weight, b) enriching the boron trifluoride complex catalyst which is obtained in the form of droplets in the disperse and/or coherent phase, c) recycling the complex-enriched phases to the polymerization and d) compensating for catalyst losses by adding boron trifluoride and, if necessary, complexing agents.
    • 一种制备低分子量高反应性聚异丁烯的方法,该聚异丁烯的平均分子量Mn为500-5000道尔顿,末端双键含量大于80mol%,通过在异丁烯或烃流的液相中聚合而得到,其中包括异丁烷 ]在-40至20℃和1至20巴之间的三氟化硼配合物催化剂的帮助下,a)聚合直到反应混合物的残余异丁烯含量小于2重量%,基于引入的异丁烯 或在聚合结束时除去残留的异丁烯,直到残余异丁烯含量小于2重量%,b)富集在分散和/或相干相中以液滴形式获得的三氟化硼配合物催化剂,c )将富含络合物的相循环到聚合反应中,d)通过加入三氟化硼和必要时的络合剂来补偿催化剂损失。