Patent number: 8324337

Methods of controlling molecular weight distribution of polymers and compositions thereof

Original Assignee: Novomer, Inc.

Field of technology: Industrial Machinery and Processes

Patent granted on: Tue, 04 Dec 2012

Patent drawing

Abstract

A catalyst, co-catalyst, and/or chain transfer agent is added at a time after initiation of an addition polymerization reaction to produce a polymer product with a widened molecular weight distribution relative to having all of the components in the original reaction mixture. The catalyst, co-catalyst, or chain transfer agent may be added discretely or continuously to the reaction to produce a product with a bimodal, trimodal, or other broadened molecular weight distribution.