Patent ID: 9469758
Filing Date: 2016-10-18
CPC Classification: C08F,C08L,C09D

Claim Text:
1. A composition comprising a stable aqueous dispersion of a) large acrylic based polymer particles having a volume average particle size in the range of from 130 nm to 250 nm; and b) small acrylic based polymer particles having a volume average particle size in the range of from 50 nm to 100 nm; wherein the large polymer particles comprise from 0.05 to 3 weight percent structural units of a phosphorus acid monomer or a salt thereof, based on the weight of the large particles; wherein the small polymer particles have a concentration of phosphorus acid groups and salts thereof of less than 0.05 weight percent, based on the weight of the small polymer particles; and wherein the weight-to-weight ratio of the large polymer particles to the small polymer particles is from 70:30 to 98:2 and the volume average particle size-to-volume average particle size ratio of the large polymer particles to the small polymer particles is at least 3:2.