Patent ID: 6727296
Filing Date: 2004-04-27
Classification: C09B,C09D

Abstract:
An ink having a viscosity less than 20 mPa.s (cP) at 20Â° C., comprising the components:(a) a water-dissipatable polymer with pendant hydroxy functional groups, wherein the water-dissipatable polymer has â€œnumber average molecular weightâ€  less than 25,000 and is prepared by copolymerizing: i) 1 to 95% of monomers having hydroxy functional groups, or a group which is convertible to a hydroxy functional group; ii) 1 to 95% of monomers providing water-dispersing groups; iii) 0 to 95% of monomers which are free from water-dispersing groups and hydroxy functional groups wherein i)+ii)+iii) add up to 100; said water-dissipatable polymer having colorant attached thereto by means of said pendant hydroxy functional group through a covalent â€”O-link; and (b) a liquid medium.