Patent ID: 7417102

Claim:
A composition, comprising a dispersant and at least one material dispersed by the dispersant; wherein the dispersant comprises a vinyl or acrylic polymer comprising (a) one or more anchor group monomer units (a) having at least one of an ionizable functionality, an active hydrogen functionality, a functionality that forms a covalent bond with the dispersed material, or a combination thereof, wherein the ionizable functionality is other than a carboxylic acid group in which the carbonyl carbon is separated from the closest ethylenically unsaturated carbon by at least four atoms and the anchor group monomer units (a) are other than those having polyoxyalkylene groups, and one of the anchor group monomer units is polymerized 1-(2-methacryloyloxyethyl)-2-imidazolidinone; (b) about 5% to about 45% by weight of one or more stabilizer monomer units (b) comprising at least one of a carboxylic acid group in which the carbonyl carbon is separated from the closest ethylenically unsaturated carbon by at least four atoms, a polyoxyalkylene group, a gamma-hydroxy carbamate group, a beta-hydroxy carbamate group, or a combination thereof; and (c) up to about 50 percent by weight of aromatic monomer units.