Patent ID: 7790822
Filing Date: 2010-09-07
Classification: C08F,C08G,Y10T

Abstract:
1. A process to prepare a hyperbranched polymer comprising contacting maleic anhydride with at least one terminally unsaturated acyclic aliphatic diene, wherein the diene is selected from the group consisting of 1,7-octadiene, 1,9-decadiene, 1,11-dodecadiene, 1,13-tetradecadiene, 1,3,7-octatriene, and mixtures of two or more thereof, in the presence of an effective amount of a radical initiator in an aprotic solvent under dilute conditions to produce a polymer having maleic anhydride and the diene in the polymer backbone and wherein the polymer has at least one pendent olefinic group for each 10 polymer units.