| 摘要 |
PURPOSE:To enable water resistance, plasticizer resistance, oil resistance and thermal sensitivity to be markedly enhanced, by incorporating at least one specified compound into a thermal color forming layer. CONSTITUTION:At least one compound of any of the general formulas, wherein each of R<1>, R<2>, R<3>, R<4>, R<5> and R<6> is alkyl, aryl, aralkyl, cycloalkyl, hydroxyl, hydroxy-subst. alkyl, phenyl or subst. phenyl, is incorporated in a thermal color forming layer, in a thermal recording material in which a thermal color forming layer comprising a leuco dye and a color developer for developing the color of the dye by reacting therewith as main constituents is provided on a base. By this, image stability, water resistance, plasticizer resistance, oil resistance and thermal sensitivity are enhances. The leuco dye is, for example, crystal violet lactone or 3-indolino-3-p-dimethylaminophenyl-6-dimethylaminophthalide, and the color developer is, for example, 4-phenylphenol or 4-hydorxyaceto phenone. |
