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    • 2. 发明授权
    • Protective overcoat for photographic elements
    • 摄影元素保护罩
    • US06455238B1
    • 2002-09-24
    • US09832778
    • 2001-04-12
    • Christine J. Landry-ColtrainLinda M. Franklin
    • Christine J. Landry-ColtrainLinda M. Franklin
    • G03C176
    • G03C1/7614G03C11/08G03C2001/7635Y10S430/162
    • A photographic element is disclosed comprising a support, at least one silver-halide emulsion layer superposed on the support and a processing-solution-permeable overcoat overlying the silver-halide emulsion layer that becomes water resistant in the final product. In particular, the overcoat comprises an open-pore membrane of a water-insoluble polymer, the membrane layer being made by dissolving homogeneously the polymer in a solvent mixture, the solvent mixture comprising at least one solvent which is a relatively good solvent for the water-insoluble polymer and at least one solvent which is a relatively poor solvent for the water-insoluble polymer, wherein the relatively poor solvent has a higher boiling point than the relatively good solvent, coating the dissolved mixture onto the at least one silver halide light-sensitive emulsion layer, and then drying to remove approximately all of the solvents to obtain the open-pore membrane. The invention is also directed to a method of processing the above-described photographic element, in which a latent image in the imaging element is developed to provide an imaged photographic element, and the porous-membrane layer is fused to form a water-resistant protective overcoat.
    • 公开了一种照相材料,其包括载体,叠加在载体上的至少一种卤化银乳剂层和覆盖卤化银乳剂层的加工溶液渗透性外涂层,其在最终产品中变得防水。 特别地,外涂层包括不溶于水的聚合物的开孔膜,膜层通过将聚合物均匀地溶解在溶剂混合物中而制成,该溶剂混合物包含至少一种溶剂,该溶剂是相对较好的水溶剂 不溶性聚合物和至少一种作为水不溶性聚合物的较差溶剂的溶剂,其中相对较差的溶剂的沸点高于相对较好的溶剂,将溶解的混合物涂布在至少一种卤化银发光体上, 敏感乳剂层,然后干燥除去大部分溶剂,得到开孔膜。 本发明还涉及一种处理上述照相元件的方法,其中成像元件中的潜像被显影以提供成像的照相元件,并且多孔膜层被熔合以形成防水保护 大衣。
    • 8. 发明授权
    • Scratch resistant-water resistant overcoat for photographic systems
    • 用于摄影系统的防刮水防水外套
    • US06436592B1
    • 2002-08-20
    • US09845394
    • 2001-04-30
    • Hwei-ling YauChristine J. Landry-ColtrainLinda M. Franklin
    • Hwei-ling YauChristine J. Landry-ColtrainLinda M. Franklin
    • G03C176
    • G03C1/7614G03C11/08G03C2001/7635G03C2200/47Y10S430/162
    • The present invention is an imaged photographic element having a protective overcoat thereon. The protective overcoat is formed by providing a photographic element having at least one silver halide light-sensitive emulsion layer. A first coating of hydrophobic polymer particles having an average size of 0.01 to 1 microns, a melting temperature of from 55 to 200 ° C. at a weight percent of 30 to 95, and one or more hydrophilic polymers at a total weight percent of 5 to 70 is applied to form a first layer over the silver halide light-sensitive emulsion layer. A second coating of abrasion resistant particles having an average size of from 0.01 to 1 microns is applied to form a second layer over the first layer. The coatings are dried at temperatures not exceeding the melting point of the particles used in the first coating, or of the glass transition temperature of the abrasion resistant particles used in the second coating, whichever is the lowest. After photoprocessing, the first and second layers can be fused to form a protective overcoat. The photographic element is developed to provide an imaged photographic element.
    • 本发明是在其上具有保护性外涂层的成像照相元件。 保护性外涂层通过提供具有至少一种卤化银感光乳剂层的照相元件形成。 平均尺寸为0.01至1微米,熔化温度为55至200℃,重量百分比为30至95的疏水性聚合物颗粒和一种或多种总重量百分比为5的亲水性聚合物的第一涂层 施加到70以形成卤化银感光乳剂层上的第一层。 施加平均尺寸为0.01至1微米的耐磨颗粒的第二涂层以在第一层上形成第二层。 涂层在不超过第一涂层中使用的颗粒的熔点或第二涂层中使用的耐磨性颗粒的玻璃化转变温度的温度下进行干燥,以最低者为准。 在光处理之后,第一层和第二层可以熔合以形成保护性外涂层。 照相元件被显影以提供成像的照相元件。