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    • 3. 发明授权
    • Process for the preparation of high chloride emulsions containing iodide
    • 制备含有碘化物的高氯化物乳液的方法
    • US06265145B1
    • 2001-07-24
    • US09475405
    • 1999-12-30
    • Rajesh V. MehtaJerzy A. BudzJess B. Hendricks, IIIHeinz E. StapelfeldtSeshadri JagannathanRamesh Jagannathan
    • Rajesh V. MehtaJerzy A. BudzJess B. Hendricks, IIIHeinz E. StapelfeldtSeshadri JagannathanRamesh Jagannathan
    • G03C1005
    • G03C1/015G03C1/035G03C1/07G03C2001/03517G03C2200/01
    • A process for the preparation of a radiation-sensitive silver halide emulsion comprised of high chloride cubical silver halide grains containing from 0.05 to 3 mole percent iodide, based on total silver, where the iodide is incorporated in the grains in a controlled, non-uniform distribution forming a core containing at least 50 percent of total silver, an iodide free surface shell having a thickness of greater than 50 Å, and a sub-surface shell that contains a maximum iodide concentration is disclosed, the process comprising: (a) providing in a stirred reaction vessel a dispersing medium and host high chloride silver halide cubical grains comprising a speed enhancing amount of iodide, and (b) precipitating silver halide onto the host grains by introducing at least a silver salt solution into the dispersing medium at a rate such that the normalized molar addition rate, Rn, is above 3.0×10−2 min−1, Rn satisfying the formula: Rn=[Qf×Cf]/M where Qf is the volumetric rate of addition, in L/min, of silver salt solution into the reaction vessel; Cf is the concentration, in moles/L, of the silver salt solution; and M is total moles of silver halide in the host grains in the reaction vessel at the precise moment of addition of the silver salt solution. In a further aspect, this invention is directed towards a photographic recording element comprising a support and at least one light sensitive silver halide emulsion layer comprising silver halide grains prepared as described above. The advantages of the invention are generally accomplished in accordance with the discovery that when the exterior portion of profiled silver iodochloride grains are grown under specific conditions of high molar addition rates, iodochloride emulsions of enhanced sensitivity and photographic curve shape are produced, as speed can be increased while keeping fog to a low level.
    • 一种用于制备辐射敏感的卤化银乳剂的方法,其包含基于总银含有0.05至3摩尔%碘化物的高氯化物立方体卤化银颗粒,其中碘化物以受控的,不均匀的方式掺入颗粒中 分布形成包含总银的至少50%,厚度大于Å的无碘化物表面壳和含有最大碘化物浓度的亚表面壳的芯,该方法包括:(a)提供 在搅拌的反应容器中,分散介质和包含加速量的碘化物的高氯化物卤化银立方晶粒和(b)通过将至少一种银盐溶液以一定速率引入到分散介质中而将卤化银沉淀到主体颗粒上 使得归一化的摩尔加成速率Rn高于3.0×10 -2分钟-1,Rn满足下式:其中Qf是硅的体积加入速率(L / min) 将盐溶液加入到反应容器中; Cf是银盐溶液的浓度,以摩尔/ L表示; 并且M是在银盐溶液的添加的精确时刻反应容器中的主体颗粒中卤化银的总摩尔数。 在另一方面,本发明涉及一种照相记录元件,其包括载体和包含如上所述制备的卤化银颗粒的至少一种感光卤化银乳剂层。 本发明的优点通常根据以下发现来实现:当异氰酸银碘化银颗粒的外部部分在高摩尔添加速率的特定条件下生长时,产生增强灵敏度的碘氯化物乳剂和照相曲线形状,因为速度可以 在将雾保持在低水平的同时增加。
    • 7. 发明授权
    • Composite silver halide grains with improved reciprocity and process for their preparation
    • 具有改进的互易性的复合卤化银颗粒及其制备方法
    • US06248507B1
    • 2001-06-19
    • US09475839
    • 1999-12-30
    • Jerzy A. BudzSeshadri JagannathanAlan R. Sadler
    • Jerzy A. BudzSeshadri JagannathanAlan R. Sadler
    • G03C1005
    • G03C1/015G03C1/035G03C1/09G03C5/04G03C2001/03535G03C2001/03541G03C2001/03552G03C2001/093G03C2200/39
    • A process for the preparation of a radiation-sensitive silver halide emulsion comprised of high chloride cubical host grains containing from 0.05 to 3 mole percent iodide, based on total silver, and epitaxially deposited silver bromide, where the iodide is incorporated in the host grains in a controlled, non-uniform distribution forming a core containing at least 50 percent of total silver, an iodide free surface shell having a thickness of greater than 50 Å, and a sub-surface shell that contains a maximum iodide concentration is disclosed, the process comprising: (a) providing in a stirred reaction vessel a dispersing medium and high chloride silver halide cubical grains which form the high chloride host grain cores, (b) adding fine silver iodide grains to the reaction vessel and ripening out the fine silver iodide grains to form the sub-surface shells that contain a maximum iodide concentration, (c) precipitating silver chloride onto the sub-surface shells to form an iodide free surface shell, and (d) depositing silver bromide in an amount of from 0.05 to 5 mole percent, based on total silver, on the host grain surfaces in the presence of an iridium dopant. Also disclosed are photographic recording elements comprising a support and at least one light sensitive silver halide emulsion layer comprising silver halide grains prepared as described above, and an electronic printing method which comprises subjecting a radiation sensitive silver halide emulsion layer of a recording element to actinic radiation of at least 10−4 ergs/cm2 for up to 100&mgr; seconds duration in a pixel-by-pixel mode, wherein the silver halide emulsion layer is comprised of silver halide grains prepared as described above.
    • 一种用于制备辐射敏感的卤化银乳剂的方法,其由高氯化物立方体主体颗粒组成,其含有基于总银的0.05至3摩尔%的碘化物和外延沉积的溴化银,其中将碘化物掺入主体颗粒中 公开了一种控制的,不均匀的分布,形成包含总银的至少50%,厚度大于的无碘化物表面壳和含有最大碘化物浓度的亚表面壳的核心,该方法 包括:(a)在搅拌的反应容器中提供形成高氯化物主体颗粒芯的分散介质和高氯化物卤化银立方晶粒,(b)向反应容器中加入细小的碘化银颗粒并熟化出碘化银细颗粒 以形成含有最大碘化物浓度的亚表面壳,(c)将氯化银沉淀到次表面壳上以形成无碘化物 并且(d)在铱掺杂剂的存在下,在主体颗粒表面上以基于总银的0.05至5摩尔%的量沉积溴化银。 还公开了包含载体和包含如上所述制备的卤化银颗粒的至少一种感光卤化银乳剂层的照相记录元件和电子印刷方法,其包括使记录元件的辐射敏感卤化银乳剂层进行光化辐射 至少10-4ergerg / cm2,以逐像素模式持续长达100mu秒,其中卤化银乳剂层由如上所述制备的卤化银颗粒组成。
    • 8. 发明授权
    • High chloride emulsions doped with iridium complexes
    • 掺有铱络合物的高氯化物乳液
    • US06242172B1
    • 2001-06-05
    • US09475841
    • 1999-12-30
    • Jerzy A. BudzEric L. BellRajesh V. Mehta
    • Jerzy A. BudzEric L. BellRajesh V. Mehta
    • G03C108
    • G03C5/04G03C1/035G03C1/09G03C2001/03535G03C2001/03541G03C2001/093G03C2200/39
    • A radiation-sensitive emulsion is disclosed comprised of cubical silver halide grains containing from 0.05 to 3 mole percent iodide, based on total silver, and an iridium coordination complex dopant, wherein (i) the iodide is incorporated in the grains in a controlled, non-uniform distribution forming a core containing at least 50 percent of total silver, an iodide free surface shell having a thickness of greater than 50 Å, and a sub-surface shell that contains a maximum iodide concentration, and (ii) the iridium coordination complex dopant is incorporated into the sub-surface shell or into a region of the core extending up to 60% of the total silver into the grain from the sub-surface shell. Speed and reciprocity of iodochloride emulsions can be improved by localized addition of known in the art reciprocity-controlling iridium dopants in relation to high iodide region of the grain. By carefully incorporating reciprocity-controlling dopant within a well defined band within a grain the difficulties of the prior art can be overcome.
    • 公开了一种辐射敏感性乳剂,其包含基于总银含有0.05至3摩尔%碘化物的立方体卤化银颗粒和铱配位络合物掺杂剂,其中(i)碘化物以受控的非 - - 均匀分布,形成含有至少50%的总银,不含碘离子的表面壳,厚度大于的核心,以及含有最大碘化物浓度的亚表面壳,和(ⅱ)铱配位络合物 掺杂剂结合到子表面壳体中或引入芯部的区域中,该区域从底表面壳体延伸到总银的60%到晶粒内。 通过本领域已知的互易控制铱掺杂剂相对于颗粒的高碘化物区域的局部添加可以提高碘氯化物乳剂的速度和互惠。 通过将互易控制掺杂剂小心地结合在晶粒内的良好限定的带内,可以克服现有技术的困难。