公开(公告)号：DE3888334T2

公开(公告)日：1994-09-22

申请号：DE3888334

申请日：1988-12-23

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OHYAMATA TSUKASA ,  TAKUMA KEISUKE ,  KURODA SHIZUO ,  AIGA HIROSHI

IPC: G02B5/22 ,  C09B1/32 ,  C09K3/00 ,  G11B7/244 ,  G11B7/24

Abstract: High-purity 1,4,5,8-tetraanilidoanthraquinones which are substituted at the p-position of at least one of four anilido benzene rings by a halogen atom are good near infrared rays absorbing filters and are prepared from high purity 1,4,5,8-tetrachloroanthraquinone by reaction with a correspondingly substituted aniline or mixture of anilines in the presence of a salt of an aliphatic carboxylic acid, a benzyl alcohol derivative and copper ions as reaction catalyst.

公开(公告)号：DE3888334D1

公开(公告)日：1994-04-14

申请号：DE3888334

申请日：1988-12-23

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OHYAMATA TSUKASA ,  TAKUMA KEISUKE ,  KURODA SHIZUO ,  AIGA HIROSHI

IPC: G02B5/22 ,  C09B1/32 ,  C09K3/00 ,  G11B7/244 ,  G11B7/24

Abstract: High-purity 1,4,5,8-tetraanilidoanthraquinones which are substituted at the p-position of at least one of four anilido benzene rings by a halogen atom are good near infrared rays absorbing filters and are prepared from high purity 1,4,5,8-tetrachloroanthraquinone by reaction with a correspondingly substituted aniline or mixture of anilines in the presence of a salt of an aliphatic carboxylic acid, a benzyl alcohol derivative and copper ions as reaction catalyst.