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    • 10. 发明授权
    • Photographic element having surface protective layer
    • 具有表面保护层的摄影元件
    • US5866312A
    • 1999-02-02
    • US878791
    • 1997-06-19
    • Yongcai WangDennis E. SmithAlfred B. Fant
    • Yongcai WangDennis E. SmithAlfred B. Fant
    • G03C1/005G03C1/04G03C1/76G03C1/95G03C1/89
    • G03C1/95G03C1/7614G03C1/005G03C1/04Y10S430/162
    • The present invention is a photographic element which includes a support, at least one silver halide emulsion layer, and a light-insensitive protective overcoat. The light insensitive protective overcoat includes a hydrophilic binder and polymer particles having a glass transition temperature of at least 70.degree. C. The polymer particles prepared by the process of mechanically forming oil-in-water droplets having a size less than 400 nm of an ethylenically unsaturated monomer having hydrophobic groups, the hydrophobic groups having a logP.sub.(calc) greater than a logP.sub.(calc) of the ethylenically unsaturated monomer by at least 1 unit in an aqueous medium. A hydrophilic colloid is added to the aqueous medium in an amount sufficient to render the polymer partice compatible with the hydrophilic binder. The droplets are polymerized to a size of less than 400 nm. The present invention is also a photographic element which includes a support, at least one silver halide emulsion layer, and a light-insensitive protective overcoat. The light insensitive protective overcoat includes a hydrophilic binder and polymer particles having a glass transition temperature of at least 70.degree. C. The polymer particles prepared by the process of mechanically forming oil-in-water droplets having a size less than 400 nm of an ethylenically unsaturated monomer having a logP.sub.(calc) greater than 4, preferably greater than 6 in an aqueous medium. A hydrophilic colloid is added to the aqueous medium in an amount sufficient to render the polymer partice compatible with the hydrophilic binder. The droplets are polymerized to a size of less than 400 nm.
    • 本发明是一种照相材料,它包括一种载体,至少一种卤化银乳剂层和一种不透光的保护性外涂层。 光不敏感的保护性外涂层包括亲水性粘合剂和玻璃化转变温度至少为70℃的聚合物颗粒。通过机械地形成尺寸小于400nm的水包油液滴制备的聚合物颗粒为烯属 具有疏水基团的不饱和单体,所述疏水基团在水性介质中具有大于所述烯键式不饱和单体的logP(calc))至少1单位的logP(calc)。 将亲水胶体以足以使聚合物部分与亲水性粘合剂相容的量加入到水性介质中。 液滴聚合成小于400nm的尺寸。 本发明还是一种照相元件,它包括一种载体,至少一种卤化银乳剂层和一种不透光的保护性外涂层。 光不敏感的保护性外涂层包括亲水性粘合剂和玻璃化转变温度至少为70℃的聚合物颗粒。通过机械地形成尺寸小于400nm的水包油液滴制备的聚合物颗粒为烯属 在水性介质中logP(calc)大于4,优选大于6的不饱和单体。 将亲水胶体以足以使聚合物部分与亲水性粘合剂相容的量加入到水性介质中。 液滴聚合成小于400nm的尺寸。