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2. 发明授权

US4088493A Diffusion retarding layers comprising polymers of dimethoxyethylene 失效
标题翻译：包含二甲氧基乙烯聚合物的扩散阻滞层
公开(公告)号：US4088493A
公开(公告)日：1978-05-09
申请号：US633801
申请日：1975-11-20
申请人： Werner Krafft , Gunther Matschke , Erich Wolff
发明人： Werner Krafft , Gunther Matschke , Erich Wolff
IPC分类号： G03C8/54 , G03C8/52 , G03C1/40 , G03C5/54 , G03C7/00
CPC分类号： G03C8/52
摘要： A neutralization system for the dye diffusion transfer process comprises an acid polymer layer containing a polymer with free acid groups and a retarding layer. The retarding layer contains a hydratable polymer which in its non-hydrated state is a barrier for hydroxyl ions and in its hydrated state provides no resistance for diffusing hydroxyl ions. The retarding layer is arranged between a laminate consisting of a light-sensitive film unit comprising at least a light-sensitive silver halide emulsion layer and a non-diffusible dye giving compound associated with the light-sensitive silver halide emulsion layer. The retarding layer allows a first high pH value to be maintained during a first time interval which is sufficient and necessary for producing the desired image density in the image receiving layer and thereafter a second low pH value to be adjusted within a second time interval which is less than half as long as the first. Suitable polymers for the retarding layer are homo-, co- and graftpolymers of 1,2-dimethoxyethylene.
摘要翻译：用于染料扩散转移方法的中和系统包括含有具有游离酸基团的聚合物和延迟层的酸性聚合物层。延迟层含有可水合的聚合物，其非水合状态是羟基离子的屏障，并且在其水合状态下不提供扩散羟基离子的阻力。延迟层布置在由至少包含感光卤化银乳剂层的光敏膜单元和产生与感光卤化银乳剂层相关的化合物的不可扩散染料组成的层压板之间。延迟层允许在第一时间间隔期间保持第一高pH值，该第一时间间隔对于在图像接收层中产生期望的图像浓度是足够和必要的，此后在第二时间间隔内调节第二低pH值，不到第一的一半。用于延迟层的合适的聚合物是1,2-二甲氧基乙烯的均聚物，共聚物和接枝聚合物。

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