公开(公告)号：US20220097437A1

公开(公告)日：2022-03-31

申请号：US17424095

申请日：2020-01-16

Applicant: BASF SE

Inventor： Nikolay A. GRIGORENKO ,  Michelle RICHERT

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

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.

公开(公告)号：US20180086921A1

公开(公告)日：2018-03-29

申请号：US15568162

申请日：2016-04-22

Applicant: BASF SE

Inventor： Nikolay A. GRIGORENKO ,  Michelle RICHERT

IPC: C09D5/33 ,  C09D11/037 ,  H01B3/18 ,  C09D101/28 ,  C09D11/14 ,  C09D11/101 ,  B22F1/00 ,  B22F9/24 ,  B41M3/14 ,  B41M7/00 ,  B42D25/373 ,  B42D25/355 ,  B42D25/378 ,  B42D25/328 ,  B42D25/455

CPC classification number: C09D5/004 ,  B22F1/0018 ,  B22F9/24 ,  B22F2301/255 ,  B41M1/04 ,  B41M1/06 ,  B41M1/10 ,  B41M1/12 ,  B41M1/22 ,  B41M3/001 ,  B41M3/006 ,  B41M3/148 ,  B41M7/0081 ,  B41M7/009 ,  B42D25/23 ,  B42D25/24 ,  B42D25/29 ,  B42D25/328 ,  B42D25/355 ,  B42D25/373 ,  B42D25/378 ,  B42D25/455 ,  C09D11/037 ,  C09D11/10 ,  C09D11/101 ,  C09D11/14 ,  C09D101/284 ,  G09F3/00 ,  H01B3/18

Abstract: The present invention relates to a process for the preparation of thin silver nano-particle layers, which are produced directly on a substrate as part of a coating or printing process. The layers show different colours in transmittance and reflectance. The layers do not show the typical conductivity of metallic layers, since the particles are essentially discrete particles which are not sintered. The invention further relates to decorative and security elements. When the layers are applied over a security element, such as a hologram, the obtained products show also different colours in reflection and transmission, an extremely bright optically variable image (OVD image) and high purity and contrast. Depending on the thickness of the layer a more or less intensive metallic aspect appears.

公开(公告)号：US20240309174A1

公开(公告)日：2024-09-19

申请号：US18275435

申请日：2022-01-31

Applicant: BASF SE

Inventor： Nikolay A. GRIGORENKO ,  Andre OSWALD

IPC: C08K3/08 ,  B22F1/054 ,  B22F1/0545 ,  B22F9/24 ,  B22F10/12 ,  B33Y70/00

CPC classification number: C08K3/08 ,  B22F1/0545 ,  B22F1/0551 ,  B22F9/24 ,  B22F10/12 ,  B33Y70/00 ,  C08K2003/0806 ,  C08K2201/005 ,  C08K2201/011

Abstract: The present invention relates to radically curable compositions, comprising (A) silver nanoplatelets, (B) one reactive diluent comprising 1 to 4 (meth)acrylate groups; (C) one, or more urethane (meth)acrylates (C), which are obtainable by reaction of the following components:



(a) at least one isocyanate having two isocyanate groups,
(b) at least one polyalkylene oxide polyether having at least 2 hydroxyl groups,
(c) at least one hydroxy-functional (meth)acrylate having one hydroxyl group and one (meth)acrylate group,
(d) at least one compound having at least one isocyanate reactive group and at least one acid function,
(e) if component (d) is present, optionally at least one basic compound which is present for neutralization or partial neutralization of the acid groups of component (d),
(f) optionally at least one monoalcohol having one hydroxy function, and
(g) optionally at least one compound having at least one primary and/or secondary amino group;
(D) one, or more photonitiators; printing inks containing the compositions and their use for the production security products. Coatings obtained after curing of the compositions, show one color, when observed in transmission and another color, when observed in reflection on both sides of the cured coating. The metal-like reflection of the coatings may be further enhanced by the presence of surfactants.

公开(公告)号：US20220220284A1

公开(公告)日：2022-07-14

申请号：US17608644

申请日：2020-04-23

Applicant: BASF SE

Inventor： Nikolay A. GRIGORENKO ,  Andre OSWALD ,  Michelle RICHERT

IPC: C08K9/04 ,  C08K3/08 ,  C09D7/62 ,  C09D7/40 ,  B42D25/373

Abstract: The present invention relates to compositions, comprising silver nanoplatelets, wherein the number mean diameter of the silver nanoplatelets, present in the composition, is in the range of 50 to 150 nm with standard deviation being less than 60% and the number mean thickness of the silver nanoplatelets, present in the composition, is in the range of 5 to 30 nm with standard deviation being less than 50%, wherein the mean aspect ratio of the silver nanoplatelets is higher than 2.0 and the highest wavelength absorption maximum of the population of all silver nanoplatelets in the composition being within the range of 560 to 800 nm. A coating, comprising the composition, shows a blue color in transmission and a metallic yellow color in reflection.

公开(公告)号：US20210402466A1

公开(公告)日：2021-12-30

申请号：US17288207

申请日：2019-10-21

Applicant: BASF SE

Inventor： Nikolay A. GRIGORENKO ,  Andre OSWALD ,  Michelle RICHERT

IPC: B22F1/00 ,  C09D7/63 ,  B22F9/24 ,  C08K3/08 ,  B42D25/391 ,  B41M3/14

Abstract: The present invention relates to compositions, comprising silver nanoplatelets, wherein the mean diameter of the silver nanoplatelets, present in the composition, is in the range of 20 to 70 nm with standard deviation being less than 50% and the mean thickness of the silver nanoplatelets, present in the composition, is in the range of 5 to 30 nm with standard deviation being less than 50%, wherein the mean aspect ratio of the silver nanoplatelets is higher than 1.5, a process for its production, printing inks containing the compositions and their use in security products. The highest wavelength absorption maximum of the population of all silver nanoplatelets in the composition being within the range of 450 to 550 nm. A coating, comprising the composition, shows a red, or magenta color in transmission and a greenish-metallic color in reflection.

公开(公告)号：US20180134908A1

公开(公告)日：2018-05-17

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 ,  H01B5/14 ,  H01B1/20 ,  C09D11/037 ,  C09D11/14 ,  C23C18/06

CPC classification number: C09D11/52 ,  C08K7/06 ,  C08K2003/0806 ,  C08K2201/001 ,  C08K2201/004 ,  C08K2201/011 ,  C09D11/037 ,  C09D11/14 ,  C23C18/06 ,  H01B1/20 ,  H01B5/14 ,  H05K1/097 ,  H05K2201/026

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.