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    Photographic dispersions for yellow filter dyes
    2.
    发明公开
    Photographic dispersions for yellow filter dyes 审中-公开
    Photographische Dispersionenfürgelbe Filterfarbstoffe

    公开(公告)号：EP1308775A1

    公开(公告)日：2003-05-07

    申请号：EP02019345.4

    申请日：2002-08-29

    申请人： FERRANIA S.p.A.

    发明人： Balestra, Corrado ,  Besio, Mauro ,  Prosperi, Emilio

    IPC分类号： G03C1/005 ,  G03C1/83 ,  C09B67/00

    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 X 1 to X 8 , 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 X 1 to X 8 substituents are different from hydrogen and that the total sum of the carbon atoms of X 1 to X 8 substituents is at least sixteen; and a photographic compound represented by the following general formula (2), wherein R and R 1 each independently represent a hydrogen atom, an alkyl group, an alkylene group, a heterocyclic group or an aryl group; R 2 , R 3 and R 4 each independently represent a hydrogen atom, an alkyl group, an aryl group and R 3 and R 4 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 obtain 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通式（1）表示的蔗糖衍生物和分散在水性介质中的由前述通式（2）表示的照相化合物的照相分散体以及照相元件，其包含 膜支撑基底的一侧涂覆有包含所述照相分散体的至少一个亲水胶体乳剂层。 本发明的方法即使在冷室中长时间（30天）储存时，也可以获得照相分散体显示窄的液滴尺寸分布曲线。