| 摘要 |
PURPOSE:To improve color development properties, raw keeping properties and finger print resistance, by a method wherein at least one kind selected from N-substituted anthranilic acid derivatives of specific formulae as an electron accepting compound and metallic salts thereof and a compound possessing a non-water-soluble epoxy group are allowed to be contained in a heat-sensitive color development layer. CONSTITUTION:At least one kind selected from N-substituted anthranilic acid derivatives and metallic salts of formula I or II as an electron accepting compound and a compound possessing a non-water-soluble epoxy group are allowed to be contained in a heat-sensitive color development layer. In the formula, R1 represents a hydrogen atom, an alkyl group or an aryl group, R2 represents an alkyl group, a cycloalkyl group, an aryl group, an alkylamino group, an alkyloxy group, an aryloxy group or an arylamino group, X represent an oxygen atom or a sulfur atom, M represents a metallic atom having a valence of (n) and the (n) is an integral number. The dispersed particle diameter after pulverization of the N-substituted anthranilic acid derivatives or metallic salts thereof is preferably not exceeding 2mum to obtain color development sensitivity. |
