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    Process for producing a patterned transparent conductive film and a transparent conductive film
    4.
    发明授权
    Process for producing a patterned transparent conductive film and a transparent conductive film 有权

    公开(公告)号：US10800940B2

    公开(公告)日：2020-10-13

    申请号：US15566262

    申请日：2016-04-14

    Applicant: BASF SE

    Inventor： Rui Zhang ,  Garo Khanarian ,  Herve Dietsch ,  Nikolay A. Grigorenko ,  Olivier Enger

    IPC: C09D11/52 ,  C09D11/037 ,  H05K1/09 ,  C09D11/14 ,  C23C18/06 ,  H01B1/20 ,  H01B5/14 ,  C08K7/06 ,  C08K3/08

    Abstract: The invention relates to a process for producing a patterned transparent conductive film comprising areas with lower conductivity and areas with higher conductivity, comprising following steps: (a) applying an ink comprising electrically conductive nanoobjects with or without a binder on a substrate, forming a first layer, wherein the amount of conductive nanoobjects is such that the first layer has a low conductivity after drying; (b) drying of the first layer; (c) applying an ink comprising a metallo-organic complex in a predetermined pattern on the first layer; (d) decomposing of the ink applied in step (c), thereby forming a pattern having a higher conductivity on the first layer. The invention further relates to a transparent conductive film, comprising areas with lower conductivity and areas with higher conductivity, wherein the areas with higher conductivity and the areas with lower conductivity comprise nanoobjects and in the areas with higher conductivity, the nanoobjects are fused by metal generated by decomposition of a metallo-organic complex.

    Security element
    7.
    发明授权
    Security element 有权

    公开(公告)号：US11945254B2

    公开(公告)日：2024-04-02

    申请号：US17424095

    申请日：2020-01-16

    Applicant: BASF SE

    Inventor： Nikolay A. Grigorenko ,  Michelle Richert

    IPC: B42D25/373 ,  B42D25/21 ,  B42D25/351 ,  B42D25/415 ,  C08J7/04 ,  C08K3/08

    CPC classification number: B42D25/351 ,  B42D25/21 ,  B42D25/373 ,  B42D25/415 ,  C08J7/0427 ,  C08K3/08 ,  C08J2367/02 ,  C08J2429/04 ,  C08K2003/0806 ,  C08K2201/003

    Abstract: The present invention relates to security, or decorative elements, comprising a transparent, or translucent substrate, which may contain indicia or other visible features in or on its surface, and on at least part of the substrate surface, a first layer, comprising transition metal particles having an average diameter of from 5 nm to 500 nm and a binder, on at least part of the first layer a second layer, comprising an organic material and having a refractive index of from 1.2 to 2.3 and having a thickness of from 20 to 1000 nm, wherein the transition metal is silver, copper, gold and palladium, wherein the weight ratio of transition metal particles to binder in the first layer is in the range from 20:1 to 1:2 in case the binder is a polymeric binder, or wherein the weight ratio of transition metal particles to binder in the first layer is in the range from 5:1 to 1:15 in case the binder is an UV curable binder. The security or decorative element show a certain color in transmission and a different color in reflection and a color flop on the coating side. The color in reflection and the color flop of the security or decorative elements are controlled by adjusting the refractive index and thickness of the second layer.

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