Transparent film-forming compositions for magnetic recording
    1.
    发明授权
    Transparent film-forming compositions for magnetic recording 失效
    用于磁记录的透明成膜组合物

    公开(公告)号:US06905761B2

    公开(公告)日:2005-06-14

    申请号:US10317514

    申请日:2002-12-12

    摘要: A concentrated fine solid particle dispersion useful for forming a substantially photographically transparent magnetic recording layer is disclosed, comprising an organic solvent medium containing a dispersing agent and dispersed magnetic particles, wherein the magnetic particles are present at a concentration of at least 25% by weight and the organic solvent medium is comprised primarily of organic solvent selected from dimethyl succinate, dimethyl glutarate and dimethyl adipate. This invention provides a stable concentrated dispersion of magnetic particles useful for preparing substantially photographically transparent magnetic recording layers. A film-forming binder solution can be added to dilute the concentrated dispersion, which then can be applied to a support to form a transparent magnetic layer for a magnetic recording element. This invention also provides a photographic element which contains a magnetic recording layer which has excellent magnetic characteristics and which is substantially photographically transparent by virtue of its low granularity and optical density.

    摘要翻译: 公开了一种用于形成基本上为摄影透明的磁记录层的浓缩细小固体颗粒分散体,其包含含有分散剂和分散的磁性颗粒的有机溶剂介质,其中磁性颗粒以至少25重量%的浓度存在,以及 有机溶剂介质主要由选自琥珀酸二甲酯,戊二酸二甲酯和己二酸二甲酯的有机溶剂组成。 本发明提供用于制备基本上照相的透明磁记录层的磁性颗粒的稳定的浓缩分散体。 可以加入成膜粘合剂溶液以稀释浓缩的分散体,然后可以将其分散在载体上以形成用于磁记录元件的透明磁性层。 本发明还提供了一种照相材料,其含有磁记录层,该磁记录层具有优良的磁特性,并且由于其低颗粒度和光密度而基本上是摄影透明的。

    Silver halide photographic elements
    2.
    发明授权
    Silver halide photographic elements 失效
    卤化银照相材料

    公开(公告)号:US06174661B1

    公开(公告)日:2001-01-16

    申请号:US09221776

    申请日:1998-12-28

    IPC分类号: G03C189

    摘要: The present invention is a photographic element containing a support, at least one light sensitive emulsion layer superposed on the first side of the support, and an outermost lubricant layer superposed on the support. The outermost layer includes more than 80 percent by weight of a composite wax particle. The composite wax particle includes a wax phase and a non-crosslinked polymer phase. The wax phase is greater than 80 percent by weight of a wax which has a melting point of greater than 30° C. In one embodiment the lubricant layer contains a fluoro containing compound. It is envisioned that the lubricant layer overlies a transparent magnetic layer. The total coating weight of the composite wax particle in the lubricant layer is in the range of from 1 to 300 mg/m2. Preferably, the fluoro compound contains at least one type of an ionic group or a nonionic group.

    摘要翻译: 本发明是一种照相元件,其中含有载体,叠层在载体的第一侧上的至少一个感光乳剂层和叠置在载体上的最外面的润滑剂层。 最外层包含超过80重量%的复合蜡颗粒。 复合蜡颗粒包括蜡相和非交联聚合物相。 蜡相大于80重量%的蜡,其熔点大于30℃。在一个实施方案中,润滑剂层含有含氟化合物。 可以想到,润滑剂层覆盖在透明磁性层上。 润滑剂层中复合蜡颗粒的总涂层重量在1〜300mg / m 2的范围内。 优选地,氟化合物含有至少一种离子基团或非离子基团。