Patent ID: 6803405
Filing Date: 2004-10-12
Classification: C08F

Abstract:
A process comprisingmixing an addition copolymer and an aqueous polymer dispersion to thicken said aqueous dispersion, wherein said addition polymer is composed of a) from 30 to 79.5% by weight of N-vinylpyrrolidone, b) from 20 to 69.5% by weight of vinyl acetate, c) from 0.5 to 10% by weight of a monovinyl ester of a C4 to C20 monocarboxylic acid, and d) from 0 to 40% by weight of a further, copolymerizable, ethylenically unsaturated compound, and the percentages by weight in each case based on the weight of said copolymer.