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    • 18. 发明授权
    • Mixed emulsions of different speed properties using sulfinate and
sulfonate compounds
    • 使用亚磺酸盐和磺酸盐化合物的不同速度性质的混合乳液
    • US5840473A
    • 1998-11-24
    • US841546
    • 1997-04-23
    • Jerzy Z. MydlarzRoger L. KlausFrederick C. Derks
    • Jerzy Z. MydlarzRoger L. KlausFrederick C. Derks
    • G03C1/035G03C1/34G03C1/36G03C7/30G03C1/09
    • G03C7/3022G03C1/035G03C1/36
    • The invention relates to a photographic element comprising at least two photographic emulsions wherein the grains of said at least two emulsions are the same and wherein at least one of said at least two emulsions is treated with a speed decreasing compound of Formula I: Z.sup.1 --X.sup.1 O.sub.2 S--M.sup.1 (I) and a compound of Formula II: Z.sup.2 --X.sup.2 O.sub.x --M.sup.2 (II) wherein X.sup.1 is sulfur and X.sup.2 is selected from the group consisting of sulfur and selenium, M.sup.1 and M.sup.2 are independently selected from group consisting of a metal ion and ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently selected from the group consisting of hydrogen and an alkyl of 1-3 carbon atoms, and Z.sup.1 and Z.sup.2 are independently selected from the group consisting of an unsubstituted or substituted alkyl of 1 to 18 carbon atoms, an unsubstituted or substituted aryl group having 6 to 10 carbon atoms, an unsubstituted or substituted 5-membered or 6-membered heterocyclic group having one or two heteroatoms, and L, wherein L is a divalent linking group, provided that, if Z.sup.1 is L, the compound of Formula I is a polymer and, if Z.sup.2 is L, the compound of Formula II is a polymer.
    • 本发明涉及一种包含至少两种照相乳液的照相材料,其中所述至少两种乳液的颗粒是相同的,并且其中所述至少两种乳液中的至少一种乳液用速度下降的式I化合物:Z1-X1O2S -M1(I)和式II化合物:其中X1是硫并且X2选自硫和硒的Z2-X2Ox-M2(II),M1和M2独立地选自金属离子 和< IMAGE>其中R 1,R 2,R 3和R 4独立地选自氢和1-3个碳原子的烷基,并且Z 1和Z 2独立地选自未取代或取代的1 具有6至10个碳原子的未取代或取代的芳基,具有一个或两个杂原子的未取代或取代的5元或6元杂环基,L,其中L是二价连接基团 如果Z1是L,则式I的化合物是聚合物,如果Z 2是L,则式II的化合物是聚合物。
    • 19. 发明授权
    • Composite silver halide grains and processes for their preparation
    • 复合卤化银颗粒及其制备方法
    • US5792601A
    • 1998-08-11
    • US681654
    • 1996-07-29
    • James Lawrence EdwardsBenjamin Teh-Kung ChenEric Leslie BellRoger Lok
    • James Lawrence EdwardsBenjamin Teh-Kung ChenEric Leslie BellRoger Lok
    • G03C1/015G03C1/035G03C1/06G03C1/09G03C1/34
    • G03C1/09G03C1/015G03C1/035
    • A radiation sensitive emulsion is disclosed containing iridium doped composite silver halide grains comprised of (a) host portions having an average aspect ratio of less than 1.3 and consisting essentially of monodisperse silver iodochloride grains containing from 0.05 to 3 mole percent iodide, based on total silver forming the host portions, with maximum iodide concentrations located nearer the surface of the host portions than their center and (b) epitaxially deposited portions containing the iridium dopant and silver bromide accounting for from 0.1 to 5 mole percent of total silver forming the composite grains. The emulsions are prepared by (a) first providing an emulsion containing grains which form the host portions of the grains and (b) modifying the performance properties of the host grains by a combination of silver bromide addition, iridium dopant incorporation and antifoggant addition, in which, prior to antifoggant addition, silver bromide in the amount of from 0.1 to 5.0 mole percent, based on total silver, is added to the host grain emulsion and deposited onto the host grains in the presence of the iridium dopant to be incorporated. The emulsions of the invention demonstrate generally acceptable photographic characteristics, increased speed, and increases in contrast as exposure intensities are increased.
    • 公开了一种辐射敏感性乳剂,其包含掺杂铱的复合卤化银颗粒,其包含(a)平均长径比小于1.3的主体部分,并且基本上由基于总银的0.05至3摩尔%碘化物的单分散碘化银颗粒组成 形成主体部分,其中最大碘化物浓度位于主体部分的表面比其中心更靠近,(b)含有铱掺杂剂和溴化银的外延沉积部分占形成复合晶粒的总银的0.1-5%。 乳液通过(a)首先提供含有形成颗粒的主体部分的颗粒的乳液和(b)通过溴化银添加,铱掺杂剂掺入和防雾剂添加的组合来改变主体颗粒的性能特性, 在防灰雾添加剂之前,将含有0.1-5.0摩尔%(以总银计)的溴化银加入到主体颗粒乳剂中并在掺入铱掺杂剂的情况下沉积到主体颗粒上。 当暴露强度增加时,本发明的乳液显示出普遍可接受的照相特性,增加的速度和对比度的增加。