公开(公告)号：US5763151A

公开(公告)日：1998-06-09

申请号：US790347

申请日：1997-01-24

申请人： Thomas B. Brust ,  Philip J. Dale ,  Philip J. Zola ,  Terrence R. O'Toole

发明人： Thomas B. Brust ,  Philip J. Dale ,  Philip J. Zola ,  Terrence R. O'Toole

IPC分类号： G03C1/005 ,  G03C1/043 ,  G03C1/015 ,  G03C1/035

CPC分类号： G03C1/0051

摘要： A process is disclosed of preparing a photographic emulsion comprised of high bromide silver halide tabular grains accounting for greater than 90 percent of total grain projected area. The grains exhibit a low level of size dispersity by reason of forming in the presence of a dispersing medium containing a polyalkylene oxide block copolymer surfactant a population of silver halide grain nuclei containing twin planes, the halide content of the grain nuclei consisting essentially of silver bromide, and growing the silver halide grain nuclei containing twin planes to form the tabular silver halide grains. Inadvertent variation in tabular grain sizes and thicknesses from one precipitation to the next are minimized by growing the silver halide grain nuclei at a pH in the range of from 3.0 to 8.0 and in the presence of at least a 0.01M concentration of a partially dissociated acid having a pKa that is within 2.5 units of the pH and that forms a silver salt more soluble than the silver halide incorporated in the grains.

摘要翻译： 公开了一种制备由高溴化银卤化银片状颗粒组成的照相乳剂占总颗粒投影面积的90％以上的方法。 由于在含有聚环氧烷烃嵌段共聚物表面活性剂的分散介质的存在下形成含有双面平面的卤化银颗粒核的颗粒，表现出较低的粒度分散度，晶核的卤化物含量基本上由溴化银 并且生长含有双平面的卤化银颗粒核以形成片状卤化银颗粒。 通过在3.0至8.0范围内的pH和在至少0.01M浓度的部分解离的酸的存在下生长卤化银颗粒核，使从一个沉淀到下一个沉淀的片状晶粒尺寸和厚度的无意的变化最小化 具有pH值在2.5单位内的pKa，并且形成比结合在晶粒中的卤化银更可溶的银盐。

公开(公告)号：US6040128A

公开(公告)日：2000-03-21

申请号：US160032

申请日：1998-09-24

申请人： John W. Boettcher ,  Seshadri Jagannathan ,  Michael W. Orem ,  Philip J. Zola

发明人： John W. Boettcher ,  Seshadri Jagannathan ,  Michael W. Orem ,  Philip J. Zola

IPC分类号： G03C1/015 ,  G03C1/035 ,  G03C1/043

CPC分类号： G03C1/043 ,  G03C1/38 ,  G03C2200/03

摘要： A process of preparing a radiation-sensitive silver halide emulsion is disclosed in which a polyalkylene oxide block copolymer surfactant is employed. Dispersion of the polyalkylene oxide block copolymer surfactant in the aqueous dispersing medium is increased by the inclusion of an auxiliary surfactant. The auxiliary surfactants are selected from among those that, in the form of an aqueous solution containing 10 percent by weight of the auxiliary surfactant based on total weight of the aqueous solution, is miscible in all proportions with at least one of water and the polyalkylene oxide block copolymer surfactant.

摘要翻译： 公开了制备辐射敏感卤化银乳剂的方法，其中使用聚环氧烷嵌段共聚物表面活性剂。 通过添加辅助表面活性剂，聚环氧烷嵌段共聚物表面活性剂在水分散介质中的分散性增加。 辅助表面活性剂选自以水溶液的总重量计含有10重量％的辅助表面活性剂的水溶液的形式，可以与水和聚环氧烷烃中的至少一种以所有比例混溶 嵌段共聚物表面活性剂。

公开(公告)号：US5104786A

公开(公告)日：1992-04-14

申请号：US604276

申请日：1990-10-29

申请人： Jane H. Chronis ,  Philip J. Zola ,  David L. Benzing

发明人： Jane H. Chronis ,  Philip J. Zola ,  David L. Benzing

IPC分类号： C01G5/02 ,  G03C1/015

CPC分类号： G03C1/015

摘要： The invention is generally accomplished by providing nucleation of silver halide crystals or grain without backmixing or exposure to previously nucleated grains. Generally this is accomplished by injecting a solution of silver nitrate into a solution of sodium bromide and peptizer as it is moving in pipe in a type of flow which does not provide back mixing and moves in generally plug flow. The plug flow is carried out until nucleation is complete and then the nucleated grains are transferred to a mixing container where they are ripened, grown, and subjected to the normal treatments, such as sensitization, applied to the silver halide to be used photgraphically.

摘要翻译： 本发明通常通过提供卤化银晶体或颗粒的成核而不进行回混或暴露于先前成核的晶粒来实现。 通常这是通过将硝酸银溶液注入溴化钠和胶溶剂的溶液中而完成的，因为它在管道中以不能提供反混合并以一般的活塞流动的方式移动。 直到成核完成，然后将有核晶粒转移到混合容器中，在其中熟化，生长并进行正常处理，例如敏化，施加到卤化银上以便用光学方法进行。

公开(公告)号：US06514681B2

公开(公告)日：2003-02-04

申请号：US09864546

申请日：2001-05-24

申请人： Seshadri Jagannathan ,  Julia S. Tan ,  Roger L. Klaus ,  Philip J. Zola

发明人： Seshadri Jagannathan ,  Julia S. Tan ,  Roger L. Klaus ,  Philip J. Zola

IPC分类号： G03C1005

CPC分类号： G03C1/0051 ,  G03C1/043 ,  G03C1/047 ,  G03C2001/03511 ,  G03C2001/0357 ,  G03C2200/03 ,  G03C2200/44

摘要： A radiation-sensitive emulsion comprised of an aqueous dispersing medium and a coprecipitated grain population including tabular grains containing greater than 50 mole percent bromide, based on silver, having {111} major faces, and accounting for greater than 90 percent of total grain projected area, wherein said dispersing medium is comprised of (a) a gelatin which has been modified to convert at least one carboxylic acid group thereof to a group that does not exhibit pH-dependent ionization within the pH range from 4.0 to 7.0, and (b) a polyalkylene oxide block copolymer surfactant.

摘要翻译： 包含水分散介质和共沉淀颗粒群的辐射敏感乳液，其包括含有大于50摩尔百分比的溴化银的片状颗粒，基于银，具有{111}主面，占总颗粒投影面积的90％以上 其中所述分散介质包含（a）在4.0至7.0的pH范围内已被修饰以将其至少一个羧酸基团转化为不显示pH依赖性电离的基团的明胶，和（b） 聚环氧烷嵌段共聚物表面活性剂。

公开(公告)号：US5061616A

公开(公告)日：1991-10-29

申请号：US417106

申请日：1989-10-04

申请人： Roger H. Piggin ,  Philip J. Zola ,  Ming J. Lin

发明人： Roger H. Piggin ,  Philip J. Zola ,  Ming J. Lin

IPC分类号： G03C1/005 ,  G03C1/015 ,  G03C1/035

CPC分类号： G03C1/0051

摘要： A process is disclosed for the preparation of a tabular grain silver bromoiodide emulsion in which silver bromoiodide laminae are formed on the major faces of the tabular grains. The sensitivity of the emulsion as a function of pressure applied is rendered more nearly constant by forming the silver bromoiodide laminae on the major faces of the tabular grains within a pAg and temperature range defined by Curve A in FIG. 1. The laminae are formed by first precipitating iodide as a silver salt at peripheral sites on the tabular grains and then precipitating silver bromoiodide onto the major faces of the host tabular grains with the primary source of iodide being the previously deposited iodide. The emulsions produced exhibit high sensitivity to exposing radiation and reduced sensitivity to localized pressure.