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    • 7. 发明授权
    • Heat developable light-sensitive material containing an amidine based
precursor
    • 含有脒基前体的热显影感光材料
    • US5093229A
    • 1992-03-03
    • US236491
    • 1988-08-25
    • Yoshiharu YabukiHiroyuki Hirai
    • Yoshiharu YabukiHiroyuki Hirai
    • G03C8/40G03C1/498G03C1/61
    • G03C1/49845G03C1/615Y10S430/156
    • A heat developable light-sensitive material comprising a support having thereon at least one layer containing a base precursor, a lgiht-sensitive silver halide, a binder, and a dye-providing substance which produces or releases a diffusible dye in correspondence or countercorrespondence to the reduction of the light-sensitive silver halide to silver at an elevated temperature, the base precursor comprising a salt of a carboxylic acid and a diacidic, triacidic or tetraacidic organic base comprising a hydrocarbon group or a heterocyclic group substituted with 2 to 4 amidine groups represents by formula (I-2): ##STR1## wherein R.sup.15, R.sup.16 and R.sup.17 are as defined in the specification. The heat developable light-sensitive material has excellent age preservability and provides a high sensitivity and low-fog image.
    • 一种可热显影的感光材料,其包括其上具有至少一层的载体,所述至少一层含有碱性前体,敏感的卤化银,粘合剂和提供染料的物质,其产生或释放对应于或对应于 包含羧基酸的碱前体和包含被2〜4个脒基取代的烃基或杂环基的二酸,三元酸或四元酸有机碱的碱前体代表的基础前体代表 (I-2):其中R 15,R 16和R 17如说明书中所定义。 可热显影的感光材料具有优异的保存时间,并提供高灵敏度和低雾图像。