公开(公告)号：US11161866B2

公开(公告)日：2021-11-02

申请号：US16638875

申请日：2018-09-18

Applicant: BASF SE

Inventor： Helmut Reichelt ,  Hans Reichert ,  Oliver Seeger ,  Korinna Dormann ,  Rene Fischer ,  Christian Doerr

IPC: C07D233/84 ,  B42D25/20 ,  C09D11/02 ,  C07F15/04

Abstract: The present invention relates to a new crystal form of bis(diphenylimidazolidinetrithione-κS4, κS5)-, (SP-4-1)-nickel(II), a printing ink formulation for security printing and security documents, comprising the new crystal form of bis(diphenylimidazolidinetrithione-κS4, κS5)-, (SP-4-1)-nickel(II) as well as its use as IR absorber.

公开(公告)号：US10703923B2

公开(公告)日：2020-07-07

申请号：US15576005

申请日：2016-05-31

Applicant: BASF SE

Inventor： Hans Reichert ,  Yves Bron ,  Helmut Reichelt ,  Oliver Seeger

IPC: C09D11/037 ,  C09D11/033 ,  C09D11/101 ,  C09B47/04 ,  B42D25/382 ,  B42D25/41 ,  B41M3/14

Abstract: The present invention relates to the use of specific naphthalocyanine chromophores with different axial substituents as almost colourless IR absorbers for security printing applications.

公开(公告)号：US10252561B2

公开(公告)日：2019-04-09

申请号：US14891528

申请日：2014-05-16

Applicant: BASF SE

Inventor： Michelle Richert ,  Oliver Seeger ,  Nikolay A. Grigorenko

IPC: B42D25/29 ,  B42D25/364 ,  B42D25/328 ,  B42D25/373 ,  B42D25/24 ,  B42D25/30 ,  B42D25/40 ,  C09D7/00 ,  C09D101/18 ,  C09D5/29 ,  B41M3/14 ,  C08K3/08 ,  B32B7/02 ,  B32B9/00 ,  C08L101/00 ,  G07D7/00 ,  G09F3/00 ,  C09D5/00

Abstract: The present invention relates to complex security elements based on liquid crystal coatings which are subsequently coated with specific metallic nano-shaped metal particles, a method for their manufacture, in particular on a glass, paper or on a plastic substrate and a security product obtainable using the security element. The security element may contain additionally an embossed surface relief microstructure, especially an optically variable image (an optically variable device, OVD), such as a hologram. A further aspect of the invention is the use of such a security element for the prevention of counterfeit or reproduction of a document of value.