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    • 1. 发明授权
    • Heat-sensitive recording material
    • 热敏记录材料
    • US5378674A
    • 1995-01-03
    • US216379
    • 1994-03-23
    • Norio KobayashiToshiaki TakahashiMasahiro MakinoMasaaki Hosoda
    • Norio KobayashiToshiaki TakahashiMasahiro MakinoMasaaki Hosoda
    • B41M5/30B41M5/333B41M5/337B41M5/28
    • B41M5/3336B41M5/3335B41M5/3375
    • A heat-sensitive recording material comprises a heat-sensitive color forming layer which is formed on a supporter and contains a colorless or light color leuco dyestuff as a color forming substance, a developer which develops color of the leuco dyestuff by reaction with it when heated and a sensitizer. The developer is 2,4'-dihydroxydiphenylsulfone having purity of 97 weight % or more and prepared by washing and drying crystal which is obtained by dissolving crude 2,4'-dihydroxydiphenylsulfone in an alcohol having 1 to 4 carbon atoms or in a mixture of an alcohol having 1 to 4 carbon atoms and water by heating and then cooling the solution or partially removing the solvent from the solution by distillation. The heat-sensitive recording material has excellent properties, such as reduced fog and excellent image preservation (weatherability).
    • 热敏记录材料包括形成在支持体上并含有无色或浅色无色染料作为成色物质的热敏成色层,当加热时与其反应而使无色染料显色的显色剂 和敏化剂。 显影剂是纯度为97重量%以上的2,4'-二羟基二苯基砜,其通过将粗制的2,4'-二羟基二苯基砜溶解在碳原子数为1〜4的醇中而得到的结晶洗涤干燥, 具有1至4个碳原子的醇和水,然后通过加热然后冷却溶液或通过蒸馏部分地从溶液中除去溶剂。 热敏记录材料具有优异的性能,例如减少雾度和优异的图像保存(耐候性)。