Title:
アゾ化合物又はその塩、並びにこれを含有する染料系偏光膜、染料系偏光板、及び液晶表示装置
Document Type and Number:
Japanese Patent JP7035018
Kind Code:
B2
Abstract:
The purpose of the present invention is to provide an azo compound that is useful as a dichroic dye to be used in a polarizing plate. The present invention provides an azo compound represented by formula (1) or a salt thereof. (In the formula, each of A1 and A2 is, independently of each other: a naphthyl group that may have a substituent selected from a group consisting of a hydroxy group, an alkoxy group having a sulfo group and 1 to 4 carbon atoms, and a sulfo group; or a phenyl group that may have a substituent selected from the same. Each of R1 to R6 is, independently of each other: a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an alkoxy group having a sulfo group and 1 to 4 carbon atoms, a carboxy group, a hydroxy group, a halogen group; or an alkyl-substituted acylamino group having 1 to 4 carbon atoms.)
Inventors:
Yuu Hattori
Takahiro Hishita
Mitsunori Nakamura
Takahiro Hishita
Mitsunori Nakamura
Application Number:
JP2019509971A
Publication Date:
March 14, 2022
Filing Date:
March 28, 2018
Export Citation:
Assignee:
NIPPON KAYAKU KABUSHIKI KAISHA
International Classes:
C09B43/136; C09B67/22; G02B5/30; G02F1/1335
Domestic Patent References:
| JP2001002631A | ||||
| JP2009155364A | ||||
| JP2010502806A |
Foreign References:
| WO2016186195A1 |
Attorney, Agent or Firm:
Asamura patent office