Patent ID: 7838574

Claim:
A pigment dispersion, comprising: a. at least one dispersed pigment; an aqueous carrier; and b. at least one block copolymer dispersant consisting of Structure I, which has a copolymeric hydrophobic block (A) and a different copolymeric hydrophilic block (B); Wherein C is D is E is F is G is x1 and x2 are independently selected to be greater than zero (0) and hydrophobic block (A) exhibits a Tg of from about 65 to about 140 degrees Celsius (° C.); y1 through y5 are independently selected to be equal to or greater than zero (0), but at least two of y1 through y5 are greater than 0, including at least one of y1, y2, and y5; R1 is H or CH3; R2 is alkyl, or aryl group wherein the numbers of carbon atoms ranges from 0 to about 20, including benzyl, butyl, or ester group; and R3 is H, an alkyl group of from 1 to about 15 carbon atoms, an aryl group of from about 6 to about 18 carbon atoms; arylalkyl; polydimethylsiloxane; polyethylene glycol chain; or a polypropylene glycol chain wherein monomer D in the hydrophobic block A is selected from the group consisting of benzylmethacrylate, isobornylmethacrylate, and combinations thereof.