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公开(公告)号：US5087554A
公开(公告)日：1992-02-11
申请号：US544720
申请日：1990-06-27
Applicant: Krishnan Chari , James T. Beck
Inventor： Krishnan Chari , James T. Beck
CPC classification number: G03C7/3882
Abstract: The invention provides stable dispersions of couplers and methods of their formation. The stable dispersions are formed by the use of a nonionic water soluble polymer in combination with an anionic surfactant having a sulfate or sulfonate head group and a hydrophobic group of 8 to 20 carbons. The preferred nonionic water soluble polymers are polyethyleneoxide and polyvinylpyrrolidene. It is preferred that the dispersions have a pH of between about 5 and 5.5.
Abstract translation: 本发明提供稳定的成色剂分散体及其形成方法。 通过使用非离子水溶性聚合物与具有硫酸盐或磺酸盐头基和8至20个碳的疏水基团的阴离子表面活性剂组合来形成稳定的分散体。 优选的非离子水溶性聚合物是聚环氧乙烷和聚乙烯吡咯烷酮。 优选分散体的pH为约5至5.5。
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公开(公告)号：US5256527A
公开(公告)日：1993-10-26
申请号：US756954
申请日：1991-09-09
Applicant: Krishnan Chari , James T. Beck
Inventor： Krishnan Chari , James T. Beck
IPC: G03C7/388
CPC classification number: G03C7/3882
Abstract: The invention provides stable dispersions of couplers and methods of their formation. The stable dispersions are formed by the use of a nonionic water soluble polymer in combination with an anionic surfactant having a sulfate or sulfonate head group and a hydrophobic group of 8 to 20 carbons. The preferred nonionic water soluble polymers are polyethyleneoxide and polyvinylpyrrolidene. It is preferred that the dispersions have a pH of between about 5 and 5.5.
Abstract translation: 本发明提供稳定的成色剂分散体及其形成方法。 通过使用非离子水溶性聚合物与具有硫酸盐或磺酸盐头基和8至20个碳的疏水基团的阴离子表面活性剂组合来形成稳定的分散体。 优选的非离子水溶性聚合物是聚环氧乙烷和聚乙烯吡咯烷酮。 优选分散体的pH为约5至5.5。
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Patent Agency Ranking
公开(公告)号：US5385812A
公开(公告)日：1995-01-31
申请号：US996949
申请日：1992-12-28
Applicant: Pranab Bagchi , James T. Beck , Vincent J. Flow, III
Inventor： Pranab Bagchi , James T. Beck , Vincent J. Flow, III
CPC classification number: G03C1/005 , G03C7/388 , G03C2001/7481 , G03C2200/11 , G03C2200/20 , Y10S430/136
Abstract: The invention discloses a continuous method of manufacture of gelled dispersion melts of "small-particle" microprecipitated photographic agents. The continuous melt manufacturing process of this invention provides dispersion melts that are invariant in agent concentration, melt viscosity, and turbidity as a function of the run time and are also very reproducible and robust in repetitive preparations. Many photographic melts of this invention exhibit high photographic activity and light stability of the agents when exposed to light.
Abstract translation: 本发明公开了一种制造“小粒子”微沉淀照相剂凝胶分散体熔体的连续方法。 本发明的连续熔融制造方法提供了作为运行时间的函数的试剂浓度，熔体粘度和浊度不变的分散体熔体，并且在重复制备中也是非常可重现的和稳定的。 本发明的许多照相熔融物在暴露于光下时表现出高的摄影活性和光稳定性。
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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
Applicant: Pranab Bagchi , Steven J. Sargeant , James T. Beck , Brian Thomas
Inventor： Pranab Bagchi , Steven J. Sargeant , James T. Beck , Brian Thomas
CPC classification number: G03C7/388 , Y10S516/01
Abstract: 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.
Abstract translation: 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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公开(公告)号：US5091296A
公开(公告)日：1992-02-25
申请号：US543910
申请日：1990-06-26
Applicant: Pranab Bagchi , Steven J. Sargeant , James T. Beck , Brian Thomas
Inventor： Pranab Bagchi , Steven J. Sargeant , James T. Beck , Brian Thomas
CPC classification number: G03C7/388 , Y10S516/01
Abstract: 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.
Abstract translation: 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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公开(公告)号：US5158863A
公开(公告)日：1992-10-27
申请号：US649515
申请日：1991-02-01
Applicant: Pranab Bagchi , James T. Beck , Lia A. Crede
Inventor： Pranab Bagchi , James T. Beck , Lia A. Crede
IPC: G03C1/005
CPC classification number: G03C1/005 , Y10S516/04
Abstract: The invention is performed by providing a first flow of water and surfactant, a second flow comprising solvent, base and photographic material, and mixing said first and second streams and either simultaneously or immediately following thereof neutralizing said streams to prevent hydrolysis of a hydrolyzable surfactant and/or premature precipitation of particles before neutralization. The streams then may be immediately treated for formation into photographic materials. In a preferred method the first and second stream may be brought together immediately prior to a mixer with addition of acid directly into the mixer to neutralize the dispersion of fine particles.
Abstract translation: 本发明通过提供水和表面活性剂的第一流，包含溶剂，碱和照相材料的第二流，并混合所述第一和第二料流，并同时或紧随其后中和所述料流以防止可水解表面活性剂的水解， /或中和前颗粒的过早沉淀。 然后可以将物流立即处理以形成照相材料。 在优选的方法中，可以在混合器之前立即将第一和第二物流直接加入到混合器中以中和细颗粒的分散体。
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公开(公告)号：US4990431A
公开(公告)日：1991-02-05
申请号：US297005
申请日：1989-01-17
Applicant: Pranab Bagchi , James T. Beck , Lia A. Crede
Inventor： Pranab Bagchi , James T. Beck , Lia A. Crede
CPC classification number: G03C1/005
Abstract: The invention is performed by providing a first flow of water and surfactant, a second flow comprising solvent, base and photographic material, and mixing said first and second streams and either simultaneously or immediately following thereof neutralizing said streams to prevent hydrolysis of a hydrolyzable surfactant and/or premature precipitation of particles before neutralization. The streams then may be immediately treated for formation into photographic materials. In a preferred method the first and second stream may be brought together immediately prior to a mixer with addition of acid directly into the mixer to neutralize the dispersion of fine particles.
Abstract translation: 本发明通过提供水和表面活性剂的第一流，包含溶剂，碱和照相材料的第二流，并混合所述第一和第二料流，并同时或紧随其后中和所述料流以防止可水解表面活性剂的水解， /或中和前颗粒的过早沉淀。 然后可以将物流立即处理以形成照相材料。 在优选的方法中，可以在混合器之前立即将第一和第二物流直接加入到混合器中以中和细颗粒的分散体。
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