Patent ID: 6258887
Filing Date: 2001-07-10
Classification: C08F,C09D

Abstract:
A multi-stage aqueous emulsion polymer suitable for use in dirt pickup resistant coatings comprising(i) a first polymer comprising at least one nonionic copolymerized monoethylenically unsaturated monomer, from 0.5% to 7% of a copolymerized monoethylenically unsaturated ionic monomer, based on the weight of said first polymer, and from 0% to 1.0%, based on the weight of said first polymer, of a copolymerized multi-ethylenically unsaturated monomer, said first polymer having a Tg of 15.degree. C. to 105.degree. C.; and(ii) a second polymer comprising at least one nonionic copolymerized monoethylenically unsaturated monomer, from 0% to 2% of a copolymerized monoethylenically unsaturated ionic monomer, and from 0.25% to 6%, based on the weight of said second polymer, copolymerized multi-ethylenically unsaturated monomer, said second polymer having a Tg of -55.degree. C. to 30.degree. C., said second polymer having a different composition than said first polymer, and said second polymer being from 25% to 75% of the total weight of said first polymer and said second polymer, based on dry polymer weights.