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.