Patent ID: 6972304
Filing Date: 2005-12-06
Classification: C09D

Abstract:
1. An aqueous ink composition comprising an aqueous liquid vehicle, a colorant, and an additive which is a material selected from (a) those of the formula (b) those of the formula (c) those of the formula or (d) mixtures of two or more of (a), (b), and/or (c), wherein at least one “C” is a moiety containing a carboxylic acid group of the formulae wherein n is an integer of from 1 to about 12 and m is an integer of from about 3 to about 12, wherein n is an integer of from 1 to about 12, or combinations thereof, wherein each “C” is a moiety either capable of forming at least one hydrogen bond with a moiety identical to itself or capable of forming at least one hydrogen bond with another “C” moiety, each “X” is a divalent moiety, each “Y” is a trivalent moiety, and each “Z” is a tetravalent moiety, wherein, when the ink has been applied to a recording substrate in an image pattern and a substantial amount of the aqueous liquid vehicle has evaporated from the ink image, hydrogen bonds of sufficient strength exist between the “C” groups so that the additive forms hydrogen-bonded oligomers or polymers.