Patent ID: 8076409

Claim:
A composition comprising a particulate solid, an organic medium and/or water and a dispersant, wherein the dispersant is represented by the Formula and salts thereof: [U—(Y) x -T-N(R 1 ) c -A] d -Z(Q 1 ) j -W e (Formula 1) wherein j is zero, or an integer from 1 to 2000; d is from 2 to 3000; c is 0 or 1; x is from 2 to 90; U is R 2 —O—, —NR 3 R 4 , or R 5 —NR 6 -T-O—; R 2 is independently H or C 1-30 -optionally substituted hydrocarbyl groups or hydrocarbonyl (acyl) groups; R 1 , R 3 , R 4 , R 5 and R 6 are independently H or C 1-30 -optionally substituted hydrocarbyl groups or hydrocarbonyl groups, or the residue of an epoxide, or the residue of an optionally substituted (meth) acrylic ester or amide group; Y is C 2-4 -alkyleneoxy; T is C 2-4 alkylene; A is the residue of a non-aromatic hydrocarbyl substituted carboxylic acid containing three or more acid groups; Z is the residue of a polyamine and/or polyimine; W comprises the residue of an oxide, urea or dibasic acid or anhydride thereof; Q 1 is independently a polyester and/or polyamide chain of formula R′-G-(M) m - or a polyalkoxylate of formula U—(Y) x -T-N(R 1 ) c -D, or mixtures thereof; D is a residue of a dibasic acid or anhydride thereof; m is a positive integer from 2 to 100; R′ is hydrogen or C 1-50 -optionally substituted hydrocarbyl group; G is a divalent bond or carbonyl; M is the residue of one or more amino carboxylic acids, one or more hydroxy carboxylic acids, one or more lactones of hydroxycarboxylic acids, or mixtures thereof; and e is 0 to v, wherein v represents the maximum available number of amino and/or imino groups in Z which does not carry the groups U—(Y) x -T-N(R 1 ) c -A- or Q 1 .