Patent ID: 7361692

Claim:
A dispersant which is represented by formula 4 wherein D—*—*D represents the polyamine or polyimine; Y represents a polyoxy alkylene carbonyl chain (POAC) represented by the group T—X—(A) m (B) n — which is linked to the polyamine or polyimine via amide and/or salt linkages; and q is from 2 to 2000; T is H or a residue of a polymerization terminating group selected from C 1-50 hydrocarbyl groups: X is a direct bond or a divalent bridging group; A is a residue of one or more optionally substituted C 1-50 -alkylene or C 2-50 -alkenylene hydroxycarboxylic acids or lactones thereof; B is a residue of one or more cyclic alkylene carbonates characterized by 6 atoms in the ring portion; m and n are positive integers: and m+n is from 2 to 200.