Coloring matter for thermal recording

Abstract

Abstract PURPOSE:To contrive enhancement of color reproduction property, heat resistance, molar absorptivity, preservation stability and ink-preparing property, by using a specified azo coloring matter as a coloring matter for sublimation-type thermal transfer recording. CONSTITUTION:An amine of formula II, wherein D is any of formulas IV-VI, is converted into a diazo compound, which is coupled with an aniline of formula III, wherein X is hydrogen, methyl, formyl, acetylamine group or the like, Y is hydrogen, methoxyl or ethoxyl, each of R and R<1> is hydrogen or subst. or unsubst. 1-8C alkyl, to obtain a cyan coloring matter of formula I. The coloring matter is dissolved or dispersed in a solvent together with a binder to prepare an ink, which is applied to a base such as a tissue paper and a heat-resistant film to produce a thermal transfer sheet. The coloring matter can be used in combination with an appropriate magenta color and an appropriate yellow color to obtain full color.

Inventors

• 👤 Toshio Niwa
• 👤 俊夫 丹羽
• 👤 Yukichi Murata
• 👤 勇吉 村田
• 👤 Takao Hirota
• 👤 広田　隆男

Bibliographic Details