Patent ID: 6455657
Filing Date: 2002-09-24
Classification: C08F

Abstract:
A process for making a copolymer of a vinyl aromatic monomer and an allylic alcohol, said process comprising:(a) charging a reactor with an allylic alcohol, 0-50% of the total amount to be used of a vinyl aromatic monomer, 0-100% of the total amount to be used of a free-radical initiator; and an organic solvent in an amount greater than or equal to about 10% by weight of the total amount of the vinyl aromatic monomer; (b) heating the reaction mixture at a temperature within the range of about 100Â° C. to about 185Â° C., and; (c) gradually adding to the reaction mixture, at a decreasing rate, the remaining vinyl aromatic monomer and free-radical initiator, wherein the copolymer produced has an average hydroxyl functionality less than about 4.