Pseudo-block copolymers and process employing chain shuttling agent

US7989551B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Daniel J. Arriola · Midland, US
• Edmund M. Carnahan · Fresno, US
• Marilyn Bokota · Beaverton, US
• Phillip D. Hustad · Manvel, US
• Roger L. Kuhlman · Lake Jackson, US
• Timothy T. Wenzel · Charleston, US
• Pamela J. Stirn · Midland, US

Key dates

• Filing date: Jan 30, 2006
• Grant date: Aug 2, 2011
• Expiry date: Jan 30, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2308/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the polymerization of one or more addition polymerizable monomers to form a copolymer comprising multiple regions or segments of differentiated polymer composition or properties comprising contacting an addition polymerizable monomer or mixture of monomers under addition polymerization conditions with a composition comprising at least one olefin polymerization catalyst, a cocatalyst and a chain shuttling agent, said process being characterized by formation of at least some of the growing polymer chains under differentiated process conditions such that two or more blocks or segments formed within at least some of the resulting polymer are chemically or physically distinguishable.