Patent ID: 7273842
Filing Date: 2007-09-25
Classification: A01N,A61K,A61Q,B01F,B01J,B08B,B32B,B82Y,C04B,C08F,C08J,C08L,C09B,C09D,C09J

Abstract:
1. A colorant composition comprising at least one chromophore, polymeric nanoparticles (PNPs), a locking agent, and 0.01 to 50 wt %, based on the weight of said PNPs, of a PNP coacervation aid; wherein said PNPs comprise, as polymerized units, at least one multi-ethylenically unsaturated monomer; wherein said PNPs have a mean diameter in the range of from 1 to 50 nanometers, an acid value in the range of from 0 to 700 mg KOH/g PNP solids, an amine value in the range of from 0 to 250, a hydroxyl number in the range of from 0 to 250 mg KOH/g PNP solids, and contain at least 2% of a polarizable group, and wherein said colorant composition provides improved colorant stability, improved colorant acceptance into paints and coatings, improved compatibility of colorants with a wider range of paints and coating compositions, improved storage stability, increased color strength, and reduced viscosity drop when added to water-based paints, all relative to colorant compositions absent PNPs and 0.01 to 50 wt %, based on the weight of said PNPs, of a PNP coacervation aid.