Patent ID: 7378379

Claim:
A grease composition comprising: (a) A polymer comprising: (i) about 25 wt % to about 90 wt % of the polymer of at least one unsaturated α,β-carboxylic acid ester containing an alkyl group having about 10 to about 20 carbon atoms; (ii) about 5 wt % to about 65 wt % of the polymer of at least one unsaturated α,β-carboxylic acid ester containing an alkyl group having about 4 to about 11 carbon atoms different from monomer (i); (iii) about 0.25 wt % to about 5 wt % of the polymer of at least one unsaturated dicarboxylic acid anhydride or derivatives thereof; and (iv) at least one unsaturated α,β-carboxylic acid ester containing an alkyl group having about 1 to about 3 carbon atoms present in the range from about 0 to about 9.9 wt % of the polymer composition, wherein the polymer is free of non-monomeric amine with primary functionality, secondary functionality or mixtures thereof (b) other performance additives present in the range from about 0 to about 20 wt % of the composition; (c) at least one thickening agent; and (d) an oil of lubricating viscosity resulting in a grease composition with water wash off properties.