Patent ID: 7858694
Filing Date: 2010-12-28
Classification: C08F

Abstract:
1. Polymer of formula (I) obtained by nitroxyl mediated controlled free radical polymerization whereby an excess of acrylate is present, wherein In is the initiator fragment starting the polymerisation reaction; A and A′ are the same or different monomers selected from the group consisting of acrylic acid, methacrylic acid, acrylonitrile, methacrylonitrile, acrylic acid (C B is at least one multifunctional monomer with two or more ethylenically unsaturated bonds with the proviso that at least one of these ethylenically unsaturated bonds is of higher reactive than the other double or triple bond or bonds E is a group bearing at least one stable free nitroxyl radical, which is bound via the oxygen atom to the polymer or copolymer; or a group which results from a substitution or elimination reaction of the attached stable free nitroxyl radical; x and x′ independently is zero or a number between 5 to 5000; y is a number between 5 to 5000; z is a number 1 or greater than 1 indicating the average number of end groups E attached to the monomer sequence (A) n is a number from 1 to 20.