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    Photographic dispersions for yellow filter dyes
    1.
    发明授权
    Photographic dispersions for yellow filter dyes 失效
    黄色滤光染料的照相分散体

    公开(公告)号：US06670111B2

    公开(公告)日：2003-12-30

    申请号：US10236622

    申请日：2002-09-05

    申请人： Corrado Balestra ,  Mauro Besio ,  Emilio Prosperi

    发明人： Corrado Balestra ,  Mauro Besio ,  Emilio Prosperi

    IPC分类号： G03C140

    CPC分类号： C09B67/0084 ,  G03C1/005 ,  G03C1/832 ,  G03C2200/22 ,  G03C2200/25

    摘要： The present invention refers to a process for preparing a dispersion which comprises codispersing in an aqueous medium a sucrose derivative represented by the following general formula (1), wherein substituents X1 to X8, being the same or different, are represented by a hydrogen atom, an alkyl group or an acyl group, with the proviso that at least four of the X1 to X8 substituents are different from hydrogen and that the total sum of the carbon atoms of X1 to X8 substituents is at least sixteen; and a photographic compound represented by the following general formula (2), wherein R and R1 each independently represent a hydrogen atom, an alkyl group, an alkylene group, a heterocyclic group or an aryl group; R2, R3 and R4 each independently represent a hydrogen atom, an alkyl group, an aryl group and R3 and R4 may be combined to form a 6-membered ring. The present invention also refers to a photographic dispersion comprising a sucrose derivative represented by previous general formula (1) and a photographic compound represented by previous general formula (2) dispersed in an aqueous medium and to a photographic element comprising a film support base having coated on one side thereof at least one hydrophilic colloid emulsion layer comprising said photographic dispersion. The process of the present invention allows photographic dispersions to display a narrow drop size distribution curve even when stored for a long period of time (30 days) in cold room.

    摘要翻译： 本发明涉及一种制备分散体的方法，其包括在水性介质中共混以下述通式（1）表示的蔗糖衍生物，其中相同或不同的取代基X1至X8由氢原子表示， 烷基或酰基，条件是至少四个X 1至X 8取代基不同于氢，并且X 1至X 8取代基的碳原子总和至少为16; 和由以下通式（2）表示的照相化合物，其中R和R 1各自独立地表示氢原子，烷基，亚烷基，杂环基或芳基; R2，R3和R4各自独立地表示氢原子，烷基，芳基和R3和R4可以组合形成6-元环。本发明还涉及包含由前述 分散在水性介质中的由通式（1）表示的照相化合物和由前述通式（2）表示的照相化合物和包含在其一面上涂覆有至少一个包含所述照相分散体的亲水胶体乳剂层的薄膜载体的照相元件。 本发明的方法即使在冷室中长时间（30天）储存时，照相分散体也能显示出窄的液滴尺寸分布曲线。