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    RADAR FREQUENCY TRANSPARENT EFFECT PIGMENT MIXTURE, FORMULATIONS AND COATINGS THEREOF
    1.
    发明公开
    RADAR FREQUENCY TRANSPARENT EFFECT PIGMENT MIXTURE, FORMULATIONS AND COATINGS THEREOF 审中-公开

    公开(公告)号：US20240263013A1

    公开(公告)日：2024-08-08

    申请号：US18607127

    申请日：2024-03-15

    Applicant: ECKART GMBH

    Inventor： Carolin Brendel ,  Klaus Greiwe ,  Robert Maul ,  Oliver Bedford ,  Günter Kaupp

    IPC: C09C1/00 ,  C09C1/40

    CPC classification number: C09C1/0021 ,  C09C1/40 ,  C01P2006/62 ,  C09C2200/1004 ,  C09C2200/1058 ,  C09C2200/505

    Abstract: This invention deals with effect pigment mixture comprising platelet-like aluminum effect pigments obtained by grinding of aluminum or aluminum based alloy shot and silvery pearlescent pigments, wherein the silvery pearlescent pigments are taken from the group consisting of: a) pearlescent pigments comprising a transparent substrate which is coated with a high-refractive index layer with n>1.8, which comprises or consists of an iron-oxide with Fe(II)-ions, b) pearlescent pigments comprising a transparent substrate which is coated with a high-refractive index layer with n>1.8, which comprises or consists of titanium suboxide or a pearlescent pigment comprising a substrate with a high-refractive index with n>1.8 layer, which comprises or consists of a titanium suboxide that is optionally coated with a high-refractive index layer with n>1.8, c) pearlescent pigments comprising a transparent substrate which is coated with a high-refractive index layer with n>1.8, which comprises or consists of titanium oxynitride, d) pearlescent pigments comprising a transparent substrate which is coated with a layer comprising carbon, wherein the carbon is enclosed in a particulate form in another metal oxide layer or is formed as a separate, individual layer, e) a transparent substrate coated with a first layer comprising or consisting of a mixture of the oxides of titanium, iron and at least one of cobalt and chromium and a second layer on the first layer, wherein the second layer comprises an oxide of titanium, and mixtures or combinations of the pearlescent pigments a) to e) or pearlescent pigments with mixtures or combinations of the various coating layers mentioned in the pearlescent pigments a) to e), wherein the weight ratio of the pearlescent pigment to the aluminum effect pigment is in a range of 0.4 to 5.0. The invention deals also with a coating formulation containing this effect pigment mixture.

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