Patent ID: 7195820
Filing Date: 2007-03-27
Classification: C08F,C08L,Y10T

Abstract:
1. A core-shell polymer, comprising: a) a core comprising an elastomeric polymer, wherein said elastomeric polymer has a glass transition temperature less than 25° C., and wherein said core comprises from 85 to 95 weight percent of said core-shell polymer; b) a shell comprising a hydrophilic shell copolymer wherein said hydrophilic shell copolymer is derived from a hydrophilic component and at least one hydrophobic monomer copolymerizable with said hydrophylic component said hydrophilic component comprising from 0.5 percent to 30 percent by weight of the monomers and components from which said shell copolymer is derived arid said hydrophilic shell copolymer comprises at least 5 percent by weight of the shell; and wherein said shell comprises from 5 to 15 weight percent of said core-shell polymer, wherein said hydrophilic monomer has a solubility in water of at least 10 grams of monomer per 100 grams of water.