Patent ID: 8129466
Filing Date: 2012-03-06
Classification: C08F,C08K,C08L,C09D

Abstract:
1. A nanoparticulate dispersion comprising: a) pigment particles having an average primary particle size of less than one micron; and b) a dispersant comprising a tri-block copolymer prepared by controlled radical polymerization and represented by the following formula, wherein φ is a hydrophobic residue of or derived from a monomeric initiator, and is free of a radically transferable group, G is a hydrophobic residue of an oxirane functional monomer reacted with a carboxylic acid, W is a residue of (meth)acrylic acid alkyl esters, and -(W) Y is a residue of (meth)acrylic acid alkyl esters, and -(Y) T is or is derived from the radically transferable group of said monomeric initiator, and p, q, and s are each independently at least 1.