Patent ID: 8168713

Claim:
A dispersant comprising a compound of Formula (1) and salts thereof: E-O—(Y) x -T-NR′-A-Z—W 0-v Formula (1) wherein optionally there may be more than 2 groups E-O—(Y)-T-NR′-A- attached to Z and these may be the same or different; E is R or R—NR′-T-; R is H or C 1-50 -optionally substituted hydrocarbyl; R′ is a residue of an optionally substituted alkyl (meth)acrylate or (meth)acrylamide, or a residue of an epoxide, or a C 1-8 - optionally substituted hydrocarbyl group; Y is C 2-4 -alkyleneoxy; T is C 2-4 alkylene; A is the residue of a dibasic acid or anhydride thereof; Z is the residue of a polyamine and/or polyimine; W is the residue of an oxide, urea or dibasic acid or anhydride thereof; x is from 2 to 90; and (0-v) means a value from 0 to v, where v represents the maximum available number of amino and/or imino groups in Z which does not carry the group E-O—(Y) x -T-NR′-A-.