Patent ID: 7276555

Claim:
A method of dispersing a pigment comprising adding to the pigment an amide-modified resin or amide-modified hydrocarbyl moiety, obtained by modifying a resin, or a hydrocarbyl moiety, by reaction with one or mare compounds of the formula: R-Het-ALK-NH 2 wherein Het is a nitrogen-containing heterocyclic moiety; R represents at least one H, a C1-4 alkyl, or a C1-4 alkoxy; and ALK is a branched or unbranched C1-6 alkylene group, wherein the resin or hydrocarbyl moiety comprises a carboxylate group or a functional derivative thereof, wherein the resin is polyurethane, polyether, polyacrylate, polyamide, acrylic resin, polyester, terpene, or alkyd, and wherein the hydrocarbyl moiety is branched or unbranched C1-C25 carboxyalkylene, carboxyalkenylene, or carboxyalkynylene group, or a carboxylate functional derivative thereof which has at least 5 carbon atoms, and which may be substituted with an ester group.