Olefin polymerization process

US6258902A · kind A · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• Richard E. Campbell, Jr. · Barneveld, US
• David D. Devore · Midland, US
• Kevin P. Peil · Auburn, US
• Francis J. Timmers · Midland, US

Key dates

• Filing date: Jan 21, 1999
• Grant date: Jul 10, 2001
• Expiry date: Jan 21, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2410/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for preparing homopolymers and copolymers of addition polymerizable monomers, or mixtures of such monomers, and the resulting polymer, wherein the process comprising contacting said monomer or mixture under high monomer conversion polymerization conditions with a catalyst composition comprising: PA1 a) a catalyst system comprising a Group 3-10 metal complex; and PA1 c) a silane, or hydrocarbylsilane corresponding to the formula: EQU J.sub.j SiH.sub.4-j or A.sub.n J.sub.j SiH.sub.4-(n+j) PA1 wherein: PA2 J is C.sub.1-40 hydrocarbyl, PA2 A is a C.sub.2-20 alkenyl group, PA2 n is 1 or 2, and PA2 j is 0 or 1; wherein the polymer comprises from 0.1 to 100 long chain branches per 10,000 carbons, and at least some of which comprise a silane branching center.