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：US20210086545A1

公开(公告)日：2021-03-25

申请号：US17045703

申请日：2019-04-23

Applicant: BASF SE

Inventor： Oliver SEEGER ,  Michelle RICHERT

IPC: B42D25/425 ,  B42D25/324 ,  B42D25/351 ,  B42D25/355 ,  B42D25/373 ,  B42D25/369 ,  B42D25/364 ,  B42D25/382 ,  B42D25/465 ,  C09D175/14

Abstract: Processes can produce strongly adherent, particularly embossed, films on flexible substrates. Security elements may be obtained by such processes as may be security documents, e.g., comprising the security elements. By coating a flexible substrate first with a primer layer and then with an embossed film, the adherence of the embossed film to the substrate may be improved while keeping the optical performance of the embossed film.

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：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：US20210292588A1

公开(公告)日：2021-09-23

申请号：US17049514

申请日：2019-04-23

Applicant: BASF SE

Inventor： Michelle RICHERT ,  Oliver SEEGER

IPC: C09D11/54 ,  C09D11/102 ,  C09D11/107 ,  C09D11/101 ,  B42D25/364 ,  B42D25/373 ,  B42D25/328 ,  B42D25/369 ,  B42D25/382 ,  B41M3/14

Abstract: A process for producing strongly adherent liquid crystal films on flexible substrates, security elements, obtainable by the process and security documents, including the security elements, may involve coating a flexible substrate first with a primer layer and then with a liquid crystal film the adherence of the liquid crystal film to the substrate is improved while keeping the optical performance of the liquid crystal film in an acceptable range.

公开(公告)号：US20220389245A1

公开(公告)日：2022-12-08

申请号：US17760782

申请日：2020-09-14

Applicant: BASF SE

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

IPC: C09D11/037 ,  C01G23/053 ,  C09C1/36 ,  C09C3/08 ,  C09D11/101 ,  C09D11/107 ,  B42D25/373

Abstract: The present invention relates to metal oxide nanoparticles, a method for their production, a coating, or printing composition, comprising the metal oxide nanoparticles and the use of the composition for coating of surface relief micro- and nanostructures (e.g. holograms), manufacturing of optical waveguides, solar panels, light outcoupling layers for display and lighting devices and anti-reflection coatings. Holograms are bright and visible from any angle, when coated, or printed with the composition, comprising the metal oxide nanoparticles.

公开(公告)号：US20200165471A1

公开(公告)日：2020-05-28

申请号：US16631617

申请日：2018-07-16

Applicant: BASF SE

Inventor： Reinhold OEHRLEIN ,  Raphael DABBOUS ,  Michelle RICHERT ,  Gabriele BAISCH

IPC: C09D7/62 ,  G03H1/02 ,  C09D7/40 ,  B42D25/373 ,  C09C1/36 ,  B42D25/328 ,  C01G23/053 ,  B42D25/378

Abstract: The present invention relates to surface functionalized titanium dioxide nanoparticles, a method for its production, a coating composition, comprising the surface functionalized titanium dioxide nanoparticles and the use of the coating composition for coating holo-grams, wave guides and solar panels. Holograms are bright and visible from any angle, when printed with the coating composition, comprising the surface functionalized tita-nium dioxide nanoparticles.

公开(公告)号：US20200230646A1

公开(公告)日：2020-07-23

申请号：US16630146

申请日：2018-07-25

Applicant: BASF SE

Inventor： Nikolay A. GRIGORENKO ,  Michelle RICHERT

IPC: B05D5/06 ,  B42D25/373 ,  C09D7/61 ,  C09D11/033 ,  C09D11/101 ,  B05D3/00 ,  C09D7/40 ,  C09D7/63

Abstract: The present invention relates to a process for the preparation of thin silver nano-particles containing layers, which are produced directly on a substrate as part of a coating or printing process. The layers can show different colours in transmittance and reflectance. 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 may show different colours in reflection and transmission, an extremely bright optically variable image (OVD image). Depending on the thickness of the layer a more or less intensive metallic aspect appears.

公开(公告)号：US20180058009A1

公开(公告)日：2018-03-01

申请号：US15558318

申请日：2016-03-29

Applicant: BASF SE

Inventor： Michelle RICHERT ,  Thomas BOLLE ,  Roland FLEURY

IPC: D21H19/02 ,  D21H19/14 ,  D21H19/66 ,  D21H21/40 ,  D21H25/04 ,  C09D11/102 ,  C09D11/037 ,  B41M7/00

CPC classification number: D21H19/02 ,  B41M7/0081 ,  C09D11/037 ,  C09D11/102 ,  D21H19/14 ,  D21H19/16 ,  D21H19/26 ,  D21H19/66 ,  D21H19/84 ,  D21H21/40 ,  D21H25/04

Abstract: The instant invention pertains to a method for the production of brilliant glossy metal coatings on paper or board substrates. Further aspects of the invention are a paper or board product obtainable by using the method and the use of such a paper or board for decorative or packaging purposes. In particular the instant invention is directed to a method, wherein a UV curable composition is applied/printed on a paper or board substrate and cured through the paper or board from the reverse side by UV/Visible light. Simultaneously with the curing step the coated/printed paper or board is pressed from the coated/printed side against a mirror like shim. The shim has no structure and should be of mirror quality. In a second step this glazed and cured surface is overcoated/overprinted with an aluminium layer. The result is a metallized surface exhibiting excellent gloss and brilliance.