Patent ID: 6437033
Filing Date: 2002-08-20
Classification: C08F,C09D,D21H

Abstract:
A method for producing rosin-fatty acid vinylic polymer compositions which comprises reacting in an addition polymerization reaction:(A) about 20.0% to about 60.0% by total weight of the reactants of a fatty acid rosin mixture comprising: (1) about 10.0% to about 90.0% by total weight of the mixture of fatty acid, and (2) about 10.0% to about 90.0% by total weight of the mixture of rosin; and (B) about 40.0% to about 80.0% by total weight of the reactants of a monomer mixture comprising: (1) about 15.0% to about 45.0% by total weight of the mixture of a member selected from the group consisting of acrylic acid, methacrylic acid, fumaric acid, maleic anhydride, and combinations thereof, (2) about 55.0% to about 85.0% by total weight of the mixture of a member selected from the group consisting of non-carboxylic acid containing vinylic monomers and combinations thereof, (3) about 0.5% to about 5.0% by total weight of the mixture of a polymerization initiator, (4) up to about 4.0% by total weight of the mixture of a chain transfer agent, and (5) up to about 30% by total weight of the mixture of a hydrocarbon solvent, at a temperature in the range of about 135Â° C. to about 175Â° C. to produce a rosin-fatty acid vinylic polymer composition having a weight average molecular weight in the range of about 4,000 to about 12,000.