16.
    发明专利
    未知

    公开(公告)号:DE3724542A1

    公开(公告)日:1989-02-02

    申请号:DE3724542

    申请日:1987-07-24

    Applicant: BASF AG

    Abstract: Thin films which contain a defined concentration of dye per unit area and are useful as layer elements, e.g. for optical filters, are prepared by spreading an oleophilic dye which is soluble in an organic water-immiscible solvent and an organic polymer dissolved in an organic solvent as a thin film at the water/air interface and, after the solvent has evaporated, transferring said film by the Langmuir-Blodgett technique to a solid base material.

    19.
    发明专利
    未知

    公开(公告)号:DE3864618D1

    公开(公告)日:1991-10-10

    申请号:DE3864618

    申请日:1988-07-19

    Applicant: BASF AG

    Abstract: In the prodn. of thin films with a definite concn. of dyestuff/unit area, the novel features are than an oleophilic dyestuff (I), which is soluble in organic, water-immiscible solvent, and an organic polymer (II) are dissolved in an organic, water-immiscible solvent (III); spread at a water/air interface; and transferred to a solid substrate (IV) by the Langmuir-Blodgett technique after evaporating (III). (I) is pref. insol. in water and contains no structures which become aligned at the water/air interface. (II) can be polyglutamates with long-chain substits. in the gamma-position; or (co)polymers or polycondensates with lateral long-chain n-alkyl gps., opt. partly replaced by shorter n-alkyl gps., branched alkyl gps. of the same length or shorter and/or gps. with C-C multiple bond(s) of the same length or shorter, attached to the main polymer chain through polar gps., pref. -O-, -CO-, -CO-O- or -CO-NH-.

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