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公开(公告)号：US5279931A
公开(公告)日：1994-01-18
申请号：US692408
申请日：1991-04-26
申请人： Pranab Bagchi , Steven J. Sargeant , James T. Beck , Brian Thomas
发明人： Pranab Bagchi , Steven J. Sargeant , James T. Beck , Brian Thomas
CPC分类号： G03C7/388 , Y10S516/01
摘要： This invention describes a process of coprecipitating a photographic material such as a dye-forming coupler inside a base ionizable polymeric particle. Preparation of such a dispersion is performed by providing a first flow comprising a solution of a surfactant in water containing a polymer ionizable by base, providing a second flow comprising a water miscible solvent, base, water, and the photographic material, then mixing the said first and said second flow and immediately neutralizing the mixed flow to precipitate the photographic material inside the polymer particles forming a fine particle colloidal dispersion of the photographic material. The polymer dispersions of the invention are characterized by high photographic activity and high dye-stability in some cases.
摘要翻译： 本发明描述了在基底可电离的聚合物颗粒内共沉淀诸如染料形成成色剂的照相材料的方法。 通过提供包含表面活性剂在含有可由碱离子化的聚合物的水中的溶液提供第一流，提供包含水混溶性溶剂，碱，水和照相材料的第二流，然后将所述 第一和所述第二流动并立即中和混合流以沉积形成照相材料的细颗粒胶体分散体的聚合物颗粒内的照相材料。 在一些情况下，本发明的聚合物分散体的特征在于高照相活性和高染料稳定性。
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102.发明授权Oxygen barrier coated photographic coupler dispersion particles for enhanced dye-stability 失效用于增强染料稳定性的隔氧涂层照相胶料分散体颗粒
公开(公告)号：US5264317A
公开(公告)日：1993-11-23
申请号：US974768
申请日：1992-11-12
CPC分类号： G03C7/396 , G03C1/002 , Y10S430/11
摘要： The invention creates a selective oxygen barrier around individual coupler or other photographically active particles by surrounding each particle with a layer of water applicable oxygen barrier polymer such as polyvinyl alcohol (PVA), which will also act as a steric barrier to coalescence of the particles. Photographic products formed with such materials are more dye stable.
摘要翻译： 本发明通过用一层适用的氧阻隔聚合物如聚乙烯醇（PVA）包围每个颗粒，在单个成色剂或其它照相活性颗粒周围产生选择性氧气屏障，聚乙烯醇（PVA）也将作为颗粒聚结的空间屏障。 用这种材料形成的摄影产品更稳定染料。
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公开(公告)号：US5091296A
公开(公告)日：1992-02-25
申请号：US543910
申请日：1990-06-26
申请人： Pranab Bagchi , Steven J. Sargeant , James T. Beck , Brian Thomas
发明人： Pranab Bagchi , Steven J. Sargeant , James T. Beck , Brian Thomas
CPC分类号： G03C7/388 , Y10S516/01
摘要： This invention describes a process of coprecipitating a photographic material such as a dye-forming coupler inside a base ionizable polymeric particle. Preparation of such a dispersion is performed by providing a first flow comprising a solution of a surfactant in water containing a polymer ionizable by base, providing a second flow comprising a water miscible solvent, base, water, and the photographic material, then mixing the said first and said second flow and immediately neutralizing the mixed flow to precipitate the photographic material inside the polymer particles forming a fine particle colloidal dispersion of the photographic material. The polymer dispersions of the invention are characterized by high photographic activity and high dye-stability in some cases.
摘要翻译： 本发明描述了在基底可电离的聚合物颗粒内共沉淀诸如染料形成成色剂的照相材料的方法。 通过提供包含表面活性剂在含有可由碱离子化的聚合物的水中的溶液提供第一流，提供包含水混溶性溶剂，碱，水和照相材料的第二流，然后将所述 第一和所述第二流动并立即中和混合流以沉积形成照相材料的细颗粒胶体分散体的聚合物颗粒内的照相材料。 在一些情况下，本发明的聚合物分散体的特征在于高照相活性和高染料稳定性。
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