Patent ID: 9453089
Filing Date: 2016-09-27
CPC Classification: C07C,C08F,C08K

Claim Text:
1. A liquid phase polymerization process of isobutylene to manufacture highly reactive polyisobutylene (PIB) having Mn under 1000 and at least 50% terminal double bonds, said process comprising: a) providing a feedstock comprising isobutylene; b) providing a catalyst composition comprising a Friedel-Crafts catalyst and a complexing agent therefor; c) providing an olefinic chain transfer agent (“CTA”); d) providing a polymerization-retarding agent; e) introducing said feedstock, said catalyst composition, said chain transfer agent and said polymerization-retarding agent into a reaction zone to form a reaction mixture; f) intimately intermixing the reaction mixture in said reaction zone; g) optionally adding a modifier; h) maintaining the reaction mixture in its intimately intermixed condition to thereby cause the isobutylene therein to undergo polymerization to form polyisobutylene; and i) withdrawing a product stream comprising low molecular weight, highly reactive polyisobutylene from said reaction zone.