Invention Application
US20050004328A1 Adducts of mid-range vinylidene content polyisobutylene polymer products and methods for making the same 有权
中等偏二氯乙烯含量聚异丁烯聚合物产品的加合物及其制备方法

Adducts of mid-range vinylidene content polyisobutylene polymer products and methods for making the same
Abstract:
A reaction product comprising an adduct of a mid-range vinylidene content PIB polymer composition and maleic anhydride, a phenolic compound or a compound having a reactive site for subsequent amination. The PIB composition comprises a relatively low molecular weight, mid-range vinylidene content PIB polymer product wherein at least about 90% of the PIB molecules present in the product comprise alpha or beta position isomers. The vinylidene (alpha) isomer content of the product may range from 20% to 70% thereof and the content of tetra-substituted internal double bonds is very low, preferably less than about 5% and ideally less than about 1-2%. The mid-range vinylidene content PIB polymer products may be prepared employing a liquid phase polymerization process conducted in a loop reactor at a temperature of at least 60° F. using a BF3/methanol catalyst complex and a contact time of no more than 4 minutes.
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