Process for polymerization of olefins with silicon bridged metal

Details Process for polymerization of olefins with silicon bridged metal Process for polymerization of olefins with silicon bridged metal

1997-03-05

2000-09-12

Wu, David W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526127, 526158, 526126, 5261253, 526943, 502108, C08F 442

Patent

active

061179574

ABSTRACT:
A process for polymerization of olefins having increased molecular weight and melting point uses a catalyst formed by combining a chiral, stereorigid metallocene compound with an organoaluminum compound. The metallocene compound has a silicon hydrocarbyl radical as an interannular bridge between two cyclopentadienyl or substituted cyclopentadienyl rings which are coordinated with a metal which is bonded to a hydrocarbon radical or a halogen. The cyclopentadienyl rings are described by the formula (C.sub.5 R'.sub.m) wherein R' is hydrogen or hydrocarbyl radical having from 1-20 carbon atoms, each R' being the same or different. The metal is a group 4b, 5b or 6b metal as designated in the Periodic Table of Elements.

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