| 摘要 |
A polymer dispersant for pigments based on a graft copolymer wherein the graft copolymer has a weight average molecular weight of at least 3000 and has 10% to 90% by weight of a polymeric backbone and 90% to 10% by weight of macromonomer side chains attached to the polymeric backbone and wherein at least 20% by weight of the polymeric backbone has attached thereto an amide group which serves as a pigment anchoring group. The polymeric backbone may also have attached thereto an additional pigment anchoring group selected from the group consisting of aromatic ester groups, aromatic amine groups, aliphatic amine groups, quaternary ammonium groups, and a combination thereof. These materials disperse a wide variety of pigments and are useful in solvent borne coating compositions where they can provide improved efficiency of pigment use, lower paint viscosity, and reduced emission of volatile organic solvent. |
