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    COMPOSITIONS, COMPRISING PLATELET-SHAPED TRANSITION METAL PARTICLES
    1.
    发明公开
    COMPOSITIONS, COMPRISING PLATELET-SHAPED TRANSITION METAL PARTICLES 审中-公开

    公开(公告)号：US20240287281A1

    公开(公告)日：2024-08-29

    申请号：US18559811

    申请日：2022-05-11

    申请人： BASF SE

    发明人： Nikolay A. GRIGORENKO ,  Andre OSWALD ,  Holger LEYBACH ,  Ralf KNISCHKA ,  Andreas GERNANDT

    IPC分类号： C08K3/08 ,  B42D25/324 ,  B42D25/364 ,  B42D25/41 ,  B42D25/425 ,  C08K5/49 ,  C08K7/00

    CPC分类号： C08K3/08 ,  B42D25/324 ,  B42D25/364 ,  B42D25/41 ,  B42D25/425 ,  C08K5/49 ,  C08K7/00 ,  C08K2201/003

    摘要： The present invention relates to compositions, comprising



    (A) platelet-shaped transition metal particles, wherein the number mean diameter of the platelet-shaped transition metal particles, present in the composition, is in the range of from 15 nm to 1000 nm, the transition metal is selected from silver, copper, gold and palladium, especially silver and copper, very especially silver;
    (B) one, or more reactive diluents (B);
    (C) one, or more oligomers (C);
    (D) one, or more photoinitiators (D);
    (E) at least a surfactant (E), which is a block copolymer, comprising at least a block A and a block B, wherein
    a) the block A comprises
    a1) monomer units (A1) derived from a compound selected from alkyl (meth)acrylates, alkyl (meth)acrylamides, or any mixture thereof, and
    a2) monomer units (A2) derived from a hydroxy group, or ether group containing alkyl (meth)acrylate;
    b) the block B comprises monomer units (B) derived from a compound selected from fluorinated (meth)acrylic esters of formula






    H2C═CR46(C(O)ORF-1)  (XX), wherein



    R46 is H, or a methyl group; and
    RF-1 is an organic residue containing a perfluorinated alkyl group;
    (F) optionally one, or more polymeric binders;
    (F) optionally one, or more solvents; and
    (H) optionally further additives.




    The coatings, obtained with said compositions, show one color, when observed in transmission and another color, when observed in reflection on both sides of the cured coating.

    MULTIFUNCTION SECURITY ELEMENT
    5.
    发明申请
    MULTIFUNCTION SECURITY ELEMENT 有权

    公开(公告)号：US20230121024A1

    公开(公告)日：2023-04-20

    申请号：US17596406

    申请日：2020-06-30

    申请人： FASE S.R.L.

    发明人： Orazio AUDINO ,  Francesco BERARDI ,  Geremino CAMMISA ,  Luca CIMATTI

    IPC分类号： B42D25/328 ,  B42D25/351 ,  B42D25/373 ,  B42D25/387 ,  B42D25/445 ,  B42D25/364 ,  B42D25/369 ,  B42D25/47

    摘要： A security element includes a first transparent film, on which a holographic layer is formed having a holographic surface structure, a reflective layer arranged in contact with the holographic layer having a pattern of non-transparent regions and transparent regions, a color changing layer, and a photoactive layer having dark regions and transparent regions. In first regions, parts of the non-transparent regions of the reflective layer are not overlapped by the dark regions of the photoactive layer. In second regions, the color changing layer is backed by the dark regions of the photoactive layer. In third regions, the transparent regions of the photoactive layer are at least partly in register with the transparent regions of the reflective layer so that the third regions are continuous when passing from patterns outside the non-transparent regions of the reflective layer to patterns outside the dark regions of the photoactive layer.

    DISPLAY MEDIUM, AUTHENTICITY DETERMINATION METHOD, AND ARTICLE INCLUDING DISPLAY MEDIUM
    7.
    发明申请
    DISPLAY MEDIUM, AUTHENTICITY DETERMINATION METHOD, AND ARTICLE INCLUDING DISPLAY MEDIUM 有权

    公开(公告)号：US20220326422A1

    公开(公告)日：2022-10-13

    申请号：US17596908

    申请日：2020-06-04

    申请人： ZEON CORPORATION

    发明人： Yasuhide FUJINO

    IPC分类号： G02B5/30 ,  B42D25/364

    摘要： A display medium including a first layer, a second layer, and a third layer, wherein: a part or an entirety of the first layer, a part or an entirety of the second layer, and a part or an entirety of the third layer are stacked in a thickness direction in this order; the first layer is a layer that is capable of reflecting circularly polarized light having a rotation direction D1 and allowing to pass therethrough circularly polarized light having a rotation direction D2, which is a direction opposite to the rotation direction D1; the second layer is a phase difference layer; and the third layer is a layer that is capable of reflecting circularly polarized light whose rotation direction is the rotation direction D1 and allowing to pass therethrough circularly polarized light whose rotation direction is the rotation direction D2.

    Security device and method of making thereof
    9.
    发明授权
    Security device and method of making thereof 有权

    公开(公告)号：US11225102B2

    公开(公告)日：2022-01-18

    申请号：US16642250

    申请日：2018-08-28

    申请人： DE LA RUE INTERNATIONAL LIMITED

    发明人： John Godfrey ,  Rebecca Locke ,  Meagan De La Bastide

    IPC分类号： B42D25/324 ,  B42D25/364 ,  B42D25/29 ,  B42D25/351 ,  B42D25/355 ,  B42D25/425

    摘要： A security device and method of making thereof. The security device includes a colour shifting element that exhibits different colours dependent on the angle of incidence of light impinging upon the colour shifting element, and; an at least partially transparent light control layer covering at least a part of the colour shifting element and including a surface relief adapted to modify the angle of light incident upon the light control layer, wherein; the light control layer includes at least first and second functional regions having different refractive indices such that light incident upon the first functional region impinges upon the colour shifting element at a first angle of incidence, and light incident upon the second functional region impinges upon the colour shifting element at a second, different, angle of incidence.

    OPTICAL DEVICE AND METHOD OF MANUFACTURE THEREOF
    10.
    发明申请
    OPTICAL DEVICE AND METHOD OF MANUFACTURE THEREOF 有权

    公开(公告)号：US20220001686A1

    公开(公告)日：2022-01-06

    申请号：US17040946

    申请日：2019-03-29

    申请人： DE LA RUE INTERNATIONAL LIMITED

    发明人： Adam LISTER ,  John GODFREY

    IPC分类号： B42D25/324 ,  G02B5/28 ,  B42D25/29 ,  B42D25/351 ,  B42D25/364 ,  B42D25/373 ,  B42D25/425 ,  B42D25/455

    摘要： An optical device is disclosed, comprising; a colour shifting layer that exhibits different colours dependent on the angle of incidence of incident light, and; an array of substantially transparent microstructures covering at least a part of the colour shifting layer and configured to modify the angle of light incident to, and reflected from, the colour shifting layer, said array of microstructures arranged in accordance with a plurality of pixels of a colour image to be exhibited by the optical device, each pixel exhibiting a uniform colour, wherein; the array of microstructures comprises at least first and second sub-arrays of microstructures corresponding to respective first and second colour channels, each sub-array covering an area within a pixel corresponding to the proportion of the respective colour channel within the pixel such that the pixel exhibits the uniform colour, and further wherein; the microstructures of the first sub-array are configured to modify the angle of light incident to, and reflected from, the colour shifting layer in a first manner such that, at a substantially normal viewing angle of the optical device, the first sub array exhibits a base colour and at a first viewing angle of the optical device, the first sub-array exhibits a first colour, wherein said first viewing angle corresponds to viewing the optical device along a direction that is off the normal of the optical device and; the microstructures of the second sub-array are configured to modify the angle of light incident to, and reflected from, the colour shifting layer in a second manner different to the first such that, at a substantially normal viewing angle of the optical device, the second sub-array exhibits said base colour and at said first viewing angle, the second sub-array exhibits a second colour different from the first colour; such that at a substantially normal viewing angle, the optical device exhibits the base colour, and at said first viewing angle, the optical device exhibits the colour image. Methods of manufacturing such optical devices are also disclosed.