Patent ID: 8221534
Filing Date: 2012-07-17
Classification: C09D,Y10T

Abstract:
1. An ink-jet ink set comprising a yellow ink, a magenta ink and a cyan ink, wherein the yellow ink comprises a colorant in an amount of about 0.1 wt % to about 20 wt %, said colorant comprising C.I. Direct Yellow 132, C.I. Direct Yellow 86, or C.I. Acid Yellow 23, wherein the magenta ink comprises a colorant in an amount of about 0.1 wt % to about 20 wt % and said colorant has general formula I: wherein R 1 represents a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group, R 2 represents a hydrogen atom, a halogen atom, or a cyano group, R 3 represents a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group, a heterocyclic group, or a substituted heterocyclic group, R 4 , R 5 , R 6 and R 7 each represent a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group, a heterocyclic group, a substituted heterocyclic group, a sulfonyl group, a substituted sulfonyl group, an acyl group, or a substituted acyl group, wherein R 4 and R 5 do not represent a hydrogen atom at the same time, and R 6 and R 7 do not represent a hydrogen atom at the same time, and A 1 and A 2 each represent a carbon atom, a substituted carbon atom, or a nitrogen atom, or said colorant has general formula II: wherein R 8 , R 9 and R 10 each represent an alkyl group, a substituted alkyl group, an alkoxyl group, a substituted alkoxyl group, a halogen atom, a hydrogen atom, a hydroxyl group, a carbamoyl group, a substituted carbamoyl group, a sulfamoyl group, a substituted sulfamoyl group, an amino group, a substituted amino group, a nitro group, a sulfonate group, an alkylsulfonyl group, a substituted alkylsulfonyl group, an arylsulfonyl group, a substituted arylsulfonyl group, a carboxyl group, or a carboxylate group, j represents a number of 0, 1 or 2 R 11 , R 12 and R 13 each represent a hydrogen atom, an alkyl group, a substituted alkyl group, an alkenyl group, a substituted alkenyl group, an aryl group, a substituted aryl group, an aralkyl group, a substituted aralkyl group, an alicyclic group, a substituted alicyclic group, a heterocyclic group, or a substituted heterocyclic group, or said colorant has general formula III: wherein the cyan ink comprises a colorant in an amount of about 0.1 wt % to about 20 wt % and said colorant has general formula IV: wherein Pc has general formula VI: R 14 , R 15 , R 16 and R 17 each represented —SO 2 —R a , —SO 2 NR b R c , or —CO 2 —R a , and not all of R 14 , R 15 , R 16 and R 17 are the same but at least one of R 14 , R 15 , R 16 and R 17 comprises an ionic hydrophilic, at least one of R 14 , R 15 , R 16 and R 17 is present on each of the four benzene rings A, B, C and D in the general formula VI, R a represents a substituted or unsubstituted alkyl group, R b represents a hydrogen atom, or a substituted or unsubstituted alkyl group, R c represents a substituted or unsubstituted alkyl group, 0<k<8, 0<1<8, 0≦m<8, 0≦n<8, and 4≦k+l+m+n≦8, or said colorant has general formula V: wherein Pc has general formula VI, with an SO 3 M group or an SO 2 NH 2 group are present on at least one of the four benzene rings A, B, C and D general formula VI, M represents a lithium ion, a sodium ion, or a potassium ion, 0<x<4, 0<y<4, and 2≦x+y≦5, and wherein the absolute value of the difference in a percent residual optical density by a water resistance test of any two inks is less than about 20%.