公开(公告)号：US20220098412A1

公开(公告)日：2022-03-31

申请号：US17427403

申请日：2020-01-17

Applicant: BASF SE

Inventor： Leonhard FEILER ,  Thomas RUCH ,  Frank BACHMANN ,  Marie-Pascale PERRITAZ ,  Gerardus DE KEYZER

IPC: C09B31/053 ,  C09B31/043 ,  C09B31/30 ,  C09B31/26 ,  C09K19/60

Abstract: Dichroic azo-azomethine dyes of formula (A) or (B), wherein Ar1 to Ar10 are specific (hetero)aromatic moieties and L is a linking group, as defined in the present claims, a dichroic dye mixture comprising said azo-azomethine dyes and a process for preparing the dyes are provided. The dyes are well suited for combination with liquid crystal material for use, inter alia, in a light absorption anisotropic element, for example, in a switchable optical device or an optically anisotropic film.

公开(公告)号：US20220098413A1

公开(公告)日：2022-03-31

申请号：US17430150

申请日：2020-02-10

Applicant: BASF SE

Inventor： Hans REICHERT ,  Rene FISCHER ,  Marie-Pascale PERRITAZ ,  Helmut REICHELT ,  Oliver SEEGER ,  Korinna DORMANN

IPC: C09B47/067 ,  C09B69/10 ,  C09D11/328 ,  B41M3/14

Abstract: The present invention relates to naphthalocyanine and phthalocyanine chromophores of formula (I), their use as almost colourless IR absorbers, for optical filter applications, especially for plasma display panels, or for laser welding of plastics. The compounds may be used in compositions for inks, paints and plastics, especially in a wide variety of printing systems and are particularly well-suited for security applications.