Patent ID: 6221142
Filing Date: 2001-04-24
Classification: B82Y,C01P,C09C,C09D

Abstract:
An ink-jet ink for ink-jet printing which comprises:(a) a vehicle, and(b) at least one pigment-based colorant; wherein said colorant comprises a mixture of functional groups attached to the surface of said colorant to allow said colorant to be self-dispersing in water (Group I) and impart bleed control and waterfastness characteristics (Group II) to said colorant, wherein said Group II functional groups which impart bleed control and waterfastness characteristics to said colorant are selected from the group consisting of:.vertline.--R.sub.1 COO.sup.- M.sup.+, IIa.vertline.--Ar--CONHR.sub.1 COO.sup.- M.sup.+, IIband mixtures thereof;wherein Ar is an aryl group; M.sup.+ is a counterion; and R.sub.1 is from about 5 to about 20 carbons.