Patent ID: 6383276
Filing Date: 2002-05-07
Classification: C09B,C09D

Abstract:
An oily magenta ink in which an azomethine dye represented by the formula (I) is dissolved in an organic solvent: wherein R1 is an alkyl group having 1 to 16 carbon atoms; R2 is a halogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an amido group having 2 to 20 carbon atoms, an alkoxycarbonylamino group having 2 to 20 carbon atoms, nitro or cyano; R3 is an alkyl group having 1 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, an aryloxyalkyl group having 7 to 30 carbon atoms or an alkoxycarbonylalkyl group having 3 to 30 carbon atoms; R4 is an alkyl group having 1 to 16 carbon atoms; L1 is an alkylene group having 1 to 30 carbon atoms or an arylene group having 6 to 30 carbon atoms; L2 is â€”COâ€”NHâ€”, â€”SO2â€”NHâ€”, â€”Oâ€”, â€”Oâ€”COâ€” or â€”Oâ€”COâ€”NHâ€”; X is cyano, an alkoxycarbonyl group having 2 to 19 carbon atoms, an alkylsulfonyl group having 1 to 18 carbon atoms, an arylsulfonyl group having 6 to 26 carbon atoms, sulfamoyl, an alkylsulfamoyl group having 1 to 18 carbon atoms or an arylsulfamoyl group having 6 to 26 carbon atoms; Y is hydrogen, a halogen atom, hydroxyl, an alkoxy group having 1 to 20 carbon atoms, an aryloxy group having 6 to 20 carbon atoms or an acyloxy group having 2 to 20 carbon atoms; m is 1, 2, 3 or 4; n is an integer of 1 to 18; p is 0, 1, 2, 3 or 4; and R1, L1, L2, R3 and R4 have 20 to 50 carbon atoms in total.