Patent ID: 7901497
Filing Date: 2011-03-08
Classification: B41M,C09B,C09D

Abstract:
1. A water-based ink composition containing a water-soluble naphthalocyanine coloring matter represented by the following formula (1) or a salt thereof: wherein, M represents a hydrogen atom, a metal atom, a metal oxide, a metal hydroxide or a metal halide, X represents a carbonyl group or a sulfonyl group, W wherein, L represents a substituted or unsubstituted alkylene group having a total carbon number of C1 to C20; a substituted or unsubstituted cycloalkylene group having a total carbon number of C3 to C20; a substituted or unsubstituted alkenylene group having a total carbon number of C2 to C20; a substituted or unsubstituted alkynylene group having a total carbon number of C2 to C20; a substituted or unsubstituted aralkylene group having a total carbon number of C7 to C20; a substituted or unsubstituted phenylene group having a total carbon number of C6 to C18; a substituted or unsubstituted naphthylene group having a total carbon number of C10 to C20; or a substituted or unsubstituted divalent heterocyclic group having a total carbon number of C4 to C12, and R represents an ionic hydrophilic group, respectively; and at least one of W n represents an integer number of 1 to 24, respectively.