Patent ID: 7122605

Claim:
A method of making a hydroxyl functional urethanized acrylic graft polymer, comprising providing an ethylenically unsaturated monomer mixture (a) comprising a monomer (ai) having at least one cyclic carbonate group and the structure wherein Rn is a straight chain alkane of from 1 to 4 carbons, and R is H or CH 3 , polymerizing the monomer mixture (a) under free radical polymerization conditions to make an acrylic backbone polymer (b) comprising one or more cyclic carbonate functional groups (bi), providing at least one grafting material (c), said grafting material (c) comprising one amine group (ci) selected from primary amines and secondary amines, and a grafting moiety (cii) selected from the group consisting of acid groups, polyurethane oligomers, polyurethane polymers, polyurethane monomers, carbamate containing polymers, carbamate containing oligomers, carbamate groups, surfactants, halogen containing compounds, ether groups, polyethers, amines not reactable with cyclic carbonate groups, polyoxyalkene groups, polyalkyldienes, triazines, hindered amine light stabilizers, blocked isocyanate groups, unblocked isocyanate groups, and mixtures thereof, and reacting the one amine group (ci) of the grafting material (c) with the cyclic carbonate functional groups (bi) to make a hydroxyl functional urethanized acrylic graft polymer.