Patent ID: 6197879
Filing Date: 2001-03-06
Classification: C08F,C09D

Abstract:
A polymer useful as an inorganic pigment dispersant, said polymer being derive from monomers consisting essentially of at least 20% by weight of an ethylenically unsaturated aromatic monomer, at least 20% by weight of an ethylenically unsaturated dicarboxylic acid monomer, and at least 20% by weight of an ethylenically unsaturated monocarboxylic acid monomer, wherein the total amount of said ethylenically unsaturated dicarboxylic acid monomer and said ethylenically unsaturated monocarboxylic acid monomer provides an acid value of at least 300 an dis sufficient to permit said polymer to associate with an organic pigment in an aqueous medium in manner which disperse said inorganic pigment in said aqueous medium to form a stable aqueous dispersion of said inorganic pigment, wherein the amount of said ethylenically unsaturated aromatic monomer is sufficient to reduce the water sensitivity of a dried coating of a latex paint comprised of said stable aqueous dispersion of said inorganic pigment, and wherein the monomers from which said polymer is derived further comprise a multi-ethylenically unsaturated monomer.