Patent ID: 8163682
Filing Date: 2012-04-24
Classification: B01F,C08F,C10M,C10N

Abstract:
1. A polymer, comprising: 50-100% by weight, based on the weight of the polymer, of repeat units which are derived from one or more ethylenically unsaturated ester compounds of the formula (I) in which R is hydrogen or methyl, R wherein the polymer is a star polymer having from 3 to 21 arms and at least 3 of the arms comprise at least 40% by weight, based on the weight of the arms, of repeat units which derive from one or more ethylenically unsaturated ester compounds of the formula (I) in which R is hydrogen or methyl, R wherein the polymer is prepared by controlled polymerization proceeding from a polyfunctional initiator; wherein the number of polymer arms depends on the number of functionalities of the initiator; wherein the center of the star polymer has at most 50 carbon atoms; wherein the star polymer has a polydispersity M wherein the polymer has from 0.1 to 40% by weight of repeat units which are derived from one or more ethylenically unsaturated ester compounds of the formula (II) in which R is hydrogen or methyl, R