Patent ID: 7294184
Filing Date: 2007-11-13
Classification: C09B,C09D

Abstract:
1. An ink jet ink to be used for an ink jet recording apparatus equipped with a recording head having a heating portion surface in contact with liquid comprising at least a metal and/or a metal oxide, comprising a coloring material in a content (mass %) of 3 mass % or more with respect to a total mass of the ink jet ink, wherein the coloring material comprises a compound represented by the following general formula (V) or a salt thereof, and wherein the ink further comprises at least a compound represented by the following general formula (I) and/or a compound represented by the following general formula (II) wherein R 1 , R 2 , R 3 , and R 4 each independently represent an alkyl group having 1 to 6 carbon atoms which may be branched; A 1 O and A 2 O each independently represent an ethylene oxide group, a propylene oxide group, or a copolymerized structure of an ethylene oxide group and a propylene oxide group; and m and n each independently represent an integer more than 0, wherein R 5 represents a hydroxyl group or an alkyl group having 4 or more carbon atoms which may be branched; and p represents an integer of 4 or more, wherein R 8 represents a hydrogen atom, an alkyl group, a hydroxy lower alkyl group, a cyclohexyl group, a monoalkylaminoalkyl or dialkylaminoalkyl group, or a cyano lower alkyl group; and R 9 , R 10 , R 11 , R 12 , and R 13 each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a carboxyl group provided that R 9 , R 10 , R 11 , R 12 , and R 13 cannot simultaneously represent hydrogen atoms.