The Dow Chemical Company

Dow Global Technolgoies LLC

Marilyn Bokota

Daniel J Arriola

Phillip Dene Hustad

Francis J Timmers

Roger L Kuhlman

Edmund M Carnahan

Timothy Todd Wenzel

Pamela J Stirn

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.

Pseudo-block copolymers and process employing chain shuttling agent

An improved catalyst composition for addition polymerizations comprising: (A) a Group 4 metal complex the includes an anionic, polycyclic, fused ring ligand system containing at least 4 fused rings, and bonded to M by means of delocalized &pgr;-electrons, (B) a cocatalyst, and (C) a C conjugated diene.

Polymerization process

Growing community of inventors

Beaverton, MI, United States of America

Marilyn Bokota