Patent ID: 8613799

Claim:
A tinter composition comprising (i) a particulate solid, a polar medium, and a dispersant comprising an amphiphilic compound represented by formulae (Ia) or (Ib): wherein Y is at least one of H, or an alkyl, aryl, or an ester group having 1 to 10 carbon atoms; D is a dicarboxyl group derived from a dicarboxylic acid and/or an anhydride of a dicarboxylic group; m is 3 to 1000; n is 2 to 10; a lipophilic component X, wherein each X group may be the same or different alk(en)yl groups containing 8 or more carbon atoms; and a hydrophilic component A and A′, wherein said dispersant of formulae (Ia) or (Ib) comprises at least one C 10-20 alk(en)yl group substituted acylating agent: A is a bridging group derived from an alkylene glycol and/or polyalkylene glycol that bridges between two D repeat units in formula Ia or between a D and a Y repeat unit in formula Ia or Ib; and A′ is a residue from at least one of a polyol group, a polyether group, a polyether chain of a polyol, a polyamino group, or a polyetheramino group, said residue resulting from the reaction with the dicarboxylic acid and/or anhydride forming D-A′ wherein the total amount of A+A′ in the amphiphilic compound is 30 wt. % to 80 wt. % of the amphiphilic compound.