Title:
アゾ化合物及びそれらを含有する染料系偏光膜並びに偏光板
Document Type and Number:
Japanese Patent JP6702622
Kind Code:
B2
Abstract:
The purpose of the present invention is to provide azo compounds that are useful as a dichroic pigment for use in a polarizing plate that has excellent polarizing performance and durability and that causes little color leakage in the visible light region and in a neutral-gray polarizing plate that is for onboard use in a vehicle and that uses the abovementioned polarizing plate. An azo compound represented by formula (1) or a salt thereof. (In formula (1), one or more of R1-R6 are each independently a C1-4 alkoxy group that has a sulfo group, the other R1 and R2 are each independently a hydrogen atom, a sulfo group, a carboxy group, a C1-4 alkyl group, a C1-4 alkoxy group, a halogen group, a nitro group, an amino group, an amino group that is substituted with a C1-4 alkyl group, or an acylamino group that is substituted with a C1-4 alkyl group, and the other R3-R6 are each independently a hydrogen atom, a C1-4 alkyl group, or a C1-4 alkoxy group.)
Inventors:
Hida Shimoda
Yuyu Hattori
Mitsunori Nakamura
Nishiguchi Takuto
Yuyu Hattori
Mitsunori Nakamura
Nishiguchi Takuto
Application Number:
JP2017519411A
Publication Date:
June 03, 2020
Filing Date:
May 20, 2016
Export Citation:
Assignee:
NIPPON KAYAKU KABUSHIKI KAISHA
Pola Techno Co., Ltd.
Pola Techno Co., Ltd.
International Classes:
C09B43/124; G02B5/30; G02F1/1335
Domestic Patent References:
| JP2009155364A | ||||
| JP2007084803A | ||||
| JP2006182846A | ||||
| JP2001240762A | ||||
| JP2009132794A |
Foreign References:
| US2519651 | ||||
| WO2016021730A1 |
Attorney, Agent or Firm:
Asamura patent office