Patent ID: 6294014
Filing Date: 2001-09-25
Classification: C09B

Abstract:
A pigment dispersion comprising:(a) pigment;(b) an aqueous carrier selected from water and a mixture of water and at least one organic solvent; and(c) a pigment dispersant prepared by controlled radical polymerization, in the presence of a polymeric initiator having at least one radically transferable group, of a first monomer composition comprised of at least one radically polymerizable ethylenically unsaturated hydrophobic monomer and at least one radically polymerizable ethylenically unsaturated hydrophilic monomer,wherein said polymeric initiator forms a polymeric backbone segment, the first monomer composition forms polymeric segments pendant to said polymeric backbone segment, at least a portion of the hydrophilic monomer is located at an end of said pendant polymeric segment furthest from said polymeric backbone segment, at least a portion of said hydrophobic monomer is located at an end of the pendant polymeric segment nearest said polymeric backbone segment, and said polymeric backbone segment is hydrophobic.