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    • 6. 发明授权
    • Backside protective overcoat compositions for silver halide photographic
elements
    • 用于卤化银照相元件的背面保护性外涂层组合物
    • US6153368A
    • 2000-11-28
    • US431729
    • 1999-11-01
    • Dwight W. SchwarkYongcai WangCharles C. Anderson
    • Dwight W. SchwarkYongcai WangCharles C. Anderson
    • G03C1/76G03C1/89G03C1/93
    • G03C1/7614Y10S430/162
    • A photographic element which includes a support having a frontside and a backside, at least one silver halide emulsion layer superposed on the frontside of the support; and a protective overcoat layer superposed on the backside of the support. The protective overcoat layer is formed from a coating solution comprising a continuous liquid organic medium having therein a mixture of dispersed core/shell polymer particles and a soluble polymer. The core/shell polymer particles comprise a core portion, which is insoluble in the organic medium, and a shell portion which has an affinity for both the core portion and the organic medium and has an acid number of from 25 to 200. The soluble polymer has an acid number of from 70 to 500 and the acid number of the soluble polymer is greater than the acid number of the shell of the core/shell polymer particles.
    • 一种照相元件,其包括具有前侧和后侧的支撑体,叠置在支撑体的前侧上的至少一个卤化银乳剂层; 以及重叠在支撑体的背面上的保护性外涂层。 保护性外涂层由包含其中具有分散的核/壳聚合物颗粒和可溶性聚合物的混合物的连续液体有机介质的涂布溶液形成。 核/壳聚合物颗粒包含不溶于有机介质的核心部分和对芯部分和有机介质两者具有亲和力并且酸值为25至200的壳部分。可溶性聚合物 酸值为70〜500,可溶性聚合物的酸值大于核/壳聚合物粒子的壳的酸值。
    • 9. 发明授权
    • Antistatic backing for photographic paper
    • 防静电背衬用于相纸
    • US06171769B2
    • 2001-01-09
    • US09305950
    • 1999-05-06
    • Debasis MajumdarCharles C. Anderson
    • Debasis MajumdarCharles C. Anderson
    • G03C179
    • G03C1/85G03C1/04G03C1/79
    • The present invention is a photographic element including a support with a polyolefin resin layer, which is preferably polypropylene, on each surface of the support. The photographic element includes a print or backmark retaining and spliceable antistatic layer having a dry coverage of from 10 mg/m2 to 10,000 mg/m2 on one of the free surfaces of the polyolefin layers. An imaging layer may be superimposed on the other free surface of the polyolefin layers. The antistatic layer includes a (i) conductive agent, preferably a combination of an alkali metal salt and a polymerized alkylene oxide, (ii) colloidal silica, preferably aluminum modified colloidal silica and (iii) a polymeric film-forming binder with a peel strength of 200 g or above on a polypropylene surface on which the antistatic layer of the present invention is to be formed. Such an antistatic layer is expected to provide surface electrical resistivity of less than 12 log &OHgr;/□, preferably equal to or less than 11 log &OHgr;/□, and excellent backmark retention characteristics and spliceability for commercial photofinishing equipment such as the Gretag CLAS 35 printers.
    • 本发明是一种照相元件,其包括在支撑体的每个表面上具有聚烯烃树脂层的支撑体,其优选为聚丙烯。 照相元件包括在聚烯烃层的一个自由表面上具有10mg / m 2至10,000mg / m 2的干覆盖率的印刷或背面保持和可拼接的抗静电层。 成像层可以叠加在聚烯烃层的另一自由表面上。 抗静电层包括(i)导电剂,优选碱金属盐和聚合的烯化氧的组合,(ii)胶体二氧化硅,优选铝改性的胶体二氧化硅和(iii)具有剥离强度的聚合物成膜粘合剂 在其上将形成本发明的抗静电层的聚丙烯表面上为200g以上。 预期这种抗静电层的表面电阻率小于12logΩ/平方,优选等于或小于11logΩ/平方,以及用于商业照相洗印加工设备如Gretag CLAS 35打印机的优异的背标保持特性和可拼接性 。