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1. 发明授权

US5693461A Mixed packet color photographic system 失效
标题翻译：混合包彩色摄影系统
公开(公告)号：US5693461A
公开(公告)日：1997-12-02
申请号：US407885
申请日：1995-03-21
申请人： Pranab Bagchi , Tienteh Chen , Thomas Joseph Dannhauser , John Derek Lewis , Mark Anthony Whitson
发明人： Pranab Bagchi , Tienteh Chen , Thomas Joseph Dannhauser , John Derek Lewis , Mark Anthony Whitson
IPC分类号： G03C7/00 , G03C1/005 , G03C1/015 , G03C1/047 , G03C7/388 , G03C1/494
CPC分类号： G03C1/047 , G03C1/005 , G03C7/388
摘要： This invention describes the composition and method of preparation of heteroflocculated packet emulsion clusters containing a light sensitive and selectively photosensitized silver halide emulsion particles and particles of photographic agents such as dye-forming coupler particles. The silver halide emulsion particles are associated with a layer of adsorbed peptizing gelatin with an isoelectric pH of P.sub.1 and the grafted gelatin of the gelatin-grafted-polymer particles comprising the photographic agent has an isoelectric pH of P.sub.2 such that P.sub.1 is different than P.sub.2. At least one of the peptizing and grafted gelatins is an isoing gelatin which is sufficiently derivatized to remove ionic groups thereof such that approaching the isoelectric pH in an aqueous solution of the isoing gelatin causes massive heteroflocculation. Formation of packet emulsion clusters is achieved by heteroflocculation between oppositely charged silver halide particles and gelatin-grafted-latex polymer particles comprising the photographic agents by shift of the pH to within 0.5 pH units of the isoelectric pH of the isoing gelatin and at a value between the two isoelectric pH values of two different types of gelatins used. The heteroflocculated packet emulsions can be further stabilized via hardening of the gelatins surrounding the particles in the packet clusters using a concentrated gelatin hardener. Such packet emulsion clusters are suitable for use in mixed packet color photography.
摘要翻译：本发明描述了制备含有光敏选择性光敏卤化银乳剂颗粒和照相剂颗粒如染料形成成色剂颗粒的异源絮凝包乳液簇的组合物和方法。卤化银乳剂颗粒与等电位pH为P1的吸附的胶溶明胶层相关联，并且包含感光剂的明胶接枝聚合物颗粒的接枝明胶具有P2的等电位pH，使得P1不同于P2。胶溶和接枝的明胶中的至少一种是等离子明胶，其被充分衍生化以除去其离子基团，使得接近等离子体明胶的水溶液中的等电位pH导致大量的异型絮凝。分组乳液簇的形成是通过将相对电荷的卤化银颗粒与包含照相剂的明胶接枝胶乳聚合物颗粒之间的异相结合来实现的，所述明胶接枝胶乳聚合物颗粒通过将pH移动到等离子体明胶的等电位pH的0.5pH单位内，使用两种不同类型明胶的两种等电位pH值。通过使用浓缩明胶固化剂使包围簇中的颗粒周围的明胶固化，可以进一步稳定异源絮凝的包乳液。这样的分组乳胶簇适用于混合包彩色摄影。

2. 发明授权

US5741633A Attachment of gelatin-grafted polymer particles to pre-precipitated silver halide grains 失效
公开(公告)号：US5741633A
公开(公告)日：1998-04-21
申请号：US478631
申请日：1995-06-07
申请人： Mark Anthony Whitson , John Derek Lewis , Tienteh Chen , Thomas Joseph Dannhauser , Pranab Bagchi
发明人： Mark Anthony Whitson , John Derek Lewis , Tienteh Chen , Thomas Joseph Dannhauser , Pranab Bagchi
IPC分类号： G03C1/015 , G03C1/005 , G03C1/035 , G03C1/04 , G03C1/047 , G03C1/30 , G03C1/42 , G03C1/43 , G03C7/388 , G03C1/91
CPC分类号： G03C1/047 , G03C1/005 , G03C1/30 , G03C7/388 , G03C7/3882 , G03C2001/0471 , Y10S430/151
摘要： The invention describes silver halide packet emulsion grains or crystals that are conventionally precipitated using gelatin of a given isoelectric pH, surrounded by a layer of gelatin-grafted-polymer particles wherein the grafted gelatin has a different isoelectric pH and the said gelatin-grafted-polymer particles are optionally chemically bonded to the gelatin surrounding the silver halide microcrystals. Such packet emulsions can form the basis for a mixed-packet color photographic system.

3. 发明授权

US4067739A Method of preparing a monosize silver halide emulsion involving Ostwald ripening followed by a crystal growth stage 失效
标题翻译：制备涉及Ostwald熟化，然后是晶体生长阶段的单一卤化银乳剂的方法
公开(公告)号：US4067739A
公开(公告)日：1978-01-10
申请号：US601965
申请日：1975-08-04
申请人： John Derek Lewis
发明人： John Derek Lewis
IPC分类号： G03C1/005 , G03C1/015 , G03C1/02
CPC分类号： G03C1/015 , G03C1/035 , G03C2001/0058 , G03C2001/0357
摘要： A method of preparing a monosize silver halide emulsion of which most of the silver halide crystals are of the twinned octahedral type is provided. An aqueous solution of a silver salt and an aqueous solution of an alkali metal or ammonium halide in an aqueous dispersing medium containing a protective colloid are mixed at such concentration that the silver halide is nucleated, causing the silver halide nuclei to increase in size in the presence of a silver halide solvent by Ostwald ripening to produce a population of twinned octahedral seed crystals. Then the maximum rate of addition of silver salt and alkali metal or ammonium halide which is possible without renucleation occurring and the minimum rate of addition of silver salt and alkali metal or ammonium halide which is possible without Ostwald ripening occurring is determined and the seed crystals are caused to grow by adding to the aqueous dispersing medium aqueous silver salt solution and aqueous alkali metal or ammonium halide solution at a rate between the predetermined maximum and minimum rates and then at intervals the maximum and minimum addition rates are re-determined and the addition rates of silver and halide are adjusted to ensure that at all times during the crystal growth stage neither renucleation nor Ostwald ripening occurs, the p Br of the liquid phase being maintained above 0.15 during the whole crystal growth stage. The silver halide emulsions are useful for preparing photographic material.
摘要翻译：提供了其中大多数卤化银晶体是孪晶八面体型的单一卤化银乳剂的制备方法。将含有保护胶体的水分散介质中的银盐水溶液和碱金属或卤化铵水溶液混合，使得卤化银成核，使得卤化银核的尺寸增大通过Ostwald熟化存在卤化银溶剂以产生一群孪生八面体晶种。然后确定可能没有发生反应的银盐和碱金属或卤化铵的最大加入速率，以及在没有发生Ostwald熟化的情况下可能的银盐和碱金属或卤化铵的最小加入速率，晶种是通过以预定的最大和最小速率之间的速率加入到水性分散介质的银盐溶液和碱金属或卤化铵水溶液中，然后以一定的间隔重新确定最大和最小添加速率，并且添加速率调整银和卤化物以确保在晶体生长阶段中的任何时候都不会发生再核化和Ostwald熟化，在整个晶体生长阶段期间液相的p Br保持在0.15以上。卤化银乳剂可用于制备照相材料。

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