Patent ID: 8283404
Filing Date: 2012-10-09
Classification: B82Y,C01P,C08F,C08K,C09C,C09D

Abstract:
1. An opacifying pigment encapsulated in polymer comprising: 1) a pigment particle having an average particle diameter of from 0.005 to 5 microns and an index of refraction of at least 1.8; 2) from 0.1% to 25% by weight, based on the weight of the pigment particle, of a water-soluble first polymer, the molecular weight of which is controlled by 0 to 10 weight percent, based on the weight of the water-soluble first polymer, of an alkyl mercaptan or an alcohol or a halogenated compound, which water-soluble first polymer consists essentially of: 3) from 10% to 200% by weight, based on the weight of the pigment particle a second polymer that at least partially encapsulates the pigment particle.