Patent ID: 6506899
Filing Date: 2003-01-14
Classification: B01F,C02F,C08G,C09B,C09D

Abstract:
A pigment dispersant consisting of a reaction product resulting from reacting an isocyanate oligomer having on a statistical average at least three isocyanate groups with:(a) a hydrophilic poly(ethylene glycol)alkyl ether; (b) a hydrophobic polymer selected from the group consisting of polyesters and polyacrylates; and (c) a diamine comprising a primary amine group and a tertiary amine group; wherein the isocyanate oligomer, the hydrophilic poly(ethylene glycol)alkyl ether of (a), and the hydrophobic polymer of (b) are reacted prior to being reacted with the diamine of (c);wherein the polyester of (b) has the general formulaHO(C5H10â€”CO2)nR where R is an alkyl of 1 to 12 carbons and n is an integer of 6 to 10.