Slurry polymerization of crosslinked maleic anhydride-alkyl vinyl ether copolymers in a solvent system comprising a carboxylic acid ester and a saturated hydrocarbon

摘要

A polymerization process is described herein for making crosslinked copolymers of maleic anhydride and an alkyl vinyl ether characterized in that polymerization is carried out in a solvent system which is a mixture of a carboxylic acid ester and a saturated hydrocarbon, preferably a mixture of ethyl acetate and cyclohexane in the weight ratio of about 35% to 55% ethyl acetate and 45% to 65% cyclohexane.