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    • 5. 发明授权
    • Protective overcoat for photographic elements
    • 摄影元素保护罩
    • US06645705B2
    • 2003-11-11
    • US10007359
    • 2001-11-05
    • Hwei-Ling YauKevin M. O'ConnorElmer C. FloodDavid E. Decker
    • Hwei-Ling YauKevin M. O'ConnorElmer C. FloodDavid E. Decker
    • G03C176
    • G03C1/7614Y10S430/162
    • The present invention is a photographic element which includes 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, without requiring lamination or fusing. The presence, in the coating composition, of a compound comprising a blocked copolymer of ethylene oxide and propylene oxide has been found to improve wet durability, prevent the retention of iron, and improve the conversion of the overcoat to a water-resistant layer during processing. The present invention is also directed to a method of making a photographic print involving developing the photographic element.
    • 本发明是一种照相元件,它包括一个载体,至少一个叠加在载体上的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,在最终产品中变得防水,不含 需要层压或熔合。 在涂料组合物中,已经发现包含环氧乙烷和环氧丙烷的封端共聚物的化合物的存在可以改善湿润耐久性,防止铁的保留,并且在加工过程中改善外涂层对耐水层的转化率 。 本发明还涉及一种制造涉及显影照相元件的照相印相的方法。