GRAFT COPOLYMER WITH A UREA OR IMID FUNCTIONAL GROUP AS A PIGMENT DISPERSANT

摘要

A polymeric dispersant for pigments based on an acrylic graft copolymer wherein the graft copolymer has a weight average molecular weight of at leas t 1500 and has 2 to 97 % by weight of a polymeric backbone and 97 - 2% by weig ht of macromonomer side chains attached to the backbone and wherein the graft copolymer has at least about 1 weight percent of an imid or urea functional dispersing substituent attached to the backbone, the macromonomer, or both t he backbone and the macromonomer.