Water resistant ink compositions and process for preparation

Claim 1

A water-resistant ink composition comprising: (A) water, (B) an anionic dye selected from the group consisting of C.I. Acid Yellow 40, C.I. Acid Orange 51, C.I. Acid Red 114 and 249, C.I. Acid Blue 83, 90, 103, and 127, C.I. Acid Green 25 and 27, C.I. Direct Black 154, and epoxydized C.I. Direct Black 154, and (C) a water-resistance modifier which contains as an effective component at least one sparingly water-soluble compound containing at least one oleophilic group selected from an aromatic ring or an aliphatic hydrocarbon having 6-12 carbon atoms, and at least one hydrophilic group having at least one of O, N and S atoms; wherein said sparingly water-soluble compound is a compound which is one or two of the compounds selected from the group consisting of (a) a compound having a dicarboxylate structure selected from bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate or bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate; (b) a compound having a benzophenone structure selected from benzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, or 2,4-dihydroxy-benzophenone; (c) a compound having a phenol structure selected from ethyl 2,2-bis(4'-hydroxyphenyl)propane gallate, n-propyl gallate, isoamyl gallate salicylic aidoxime, diethyl 4-hydroxy1,2-phthalate, or para-tert-butylphenol; (d) benzimidazole; (e) a compound having a benzothiazole structure selected from 2-chloro-benzothiazole, 2-methyl-5-chlorobenzothiazole, or 2-mercaptobenzothiazole; (f) benzoin methyl ether; and (g) a compound having a benzoate structure selected from propyl p-hydroxybenzoate or phenyl benzoate.