Patent ID: 6288164
Filing Date: 2001-09-11
Classification: C09D

Abstract:
A process which comprises (i) incorporating into an ink jet printing apparatus an ink composition which comprises (a) water, (b) a surfactant selected from (1) those of formula I ##STR12##wherein the values of x, x', and y are each such that the molecular weight of the polyrrorylene oxide block of the compound is from about 900 to about 1,050, the ethylene oxide segments make up from about 45 to about 55 percent by weight of the compound, the average number of propylene oxide groups per molecule is from about 15 to about 18, and the total molecular weight is from about 1,800 to about 2,000; (2) those of formula I wherein the values of x, x', and y are each such that the molecular weight of the polypropylene oxide block of the compound is from about 3,000 to about 3,600, the ethylene oxide segments make us from about 35 to about 45 Percent by weight of the compound, the average number of propylene oxide groups per molecule is from about 51 to about 62, and the total molecular weight is from about 5,000 to about 6,000; (3) those of formula II ##STR13##wherein the values of x, x', x"", x'"", y, y', y"", and y'"" are each such that the total molecular weight of the polypropylene oxide blocks of the compound is from about 3,900 to about 4,500, the ethylene oxide segments make us from about 35 to about 45 percent by weight of the compound, the average number of propylene oxide groups per molecule is from about 67 to about 78, and the total molecular weight is from about 6,500 to about 7,500; (4) those of formula II wherein the values of x, x', x"", x'"", y, Y', y"", and y'"" are each such that the total molecular weight of the polypropylene oxide blocks of the compound is from about 2,500 to about 3,600, the ethylene oxide segments make up from about 35 to about 45 percent by weight of the compound, the average number of propylene oxide groups per molecule is from about 43 to about 62, and the total molecular weight is from about 4,150 to about 6,000; (5) those of formula III ##STR14##wherein the values of x, x', and y are each such that the molecular weight of the polypropylene oxide block of the compound is from about 800 to about 1,200, the ethylene oxide segments make us from about 45 to about 55 percent by weight of the compound, the average number of propylene oxide aroups per molecule is from about 13 to about 21, and the total molecular weight is from about 1,600 to about 2,400; or (6) mixtures thereof, and (c) a dye selected from (1) C.I. Solvent Black 29; (2) C.I. Solvent Blue 70; (3) C.I. Solvent Blue 25; (4) C.I. Solvent Yellow 82; (5) C.I. Solvent Yellow 29; (6) C.I. Solvent Red 49; or (7) mixtures thereof; and (ii) causing droplets of the ink composition to be ejected in an imagewise pattern onto the substrate.