Patent ID: 8895658
Filing Date: 2014-11-25
Classification: C08F,C09D

Abstract:
1. A grafted pigment dispersing polymeric additive comprising a polymeric pigment dispersant and a polymeric carrier grafted to each other, wherein the polymeric pigment dispersant has a weight average molecular weight of about 1,000 Daltons to about 20,000 Daltons and an acid number from about 150 to about 250 and wherein the polymeric pigment dispersant is soluble in an alkali solution, and wherein the minimum film forming temperature (MFFT) of the polymeric carrier is greater than about 10° C. and less than about 130° C., and wherein the grafted pigment dispersing polymeric additive is capable of adsorbing to an opacifying pigment, and wherein the additive comprises particles having an average particle size in the range of about 75 nm to about 200 nm in diameter.