| 摘要 |
<p>A polymer dispersant for pigments based on a graft copolymer wherein the gra ft 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 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 backbone may also have attached thereto an additional pigment anchoring group selected from the group consisting of aromatic ester, aromatic amine, aliphatic amine, and quaternar y ammonium groups, or mixtures thereof. These materials disperse a wide variet y of pigments and are useful in solvent borne coatings where they can provide improved efficiency of pigment use, lower paint viscosity, and reduced emission of volatile organic solvent.</p> |
