Title:
AZO COMPOUNDS, AND DYE-TYPE POLARIZER FILM AND POLARIZER PLATE INCLUDING SAME
Document Type and Number:
WIPO Patent Application WO/2016/186195
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide azo compounds that are useful as dichroic pigments for use in a polarizer plate that has excellent polarization properties and durability while also exhibiting minimal color leakage in the visible light spectrum, and for use in a neutral-gray polarizer plate that is for use in a vehicle and includes the polarizer plate. Specifically provided are azo compounds represented by formula (1) (therein, A is either A1, a substituted phenyl group, or A2, a naphthyl group having a hydrogen atom, a hydroxy group, a sulfo group and/or a C1-4 alkoxy group that has a sulfo group, and R1-R4 each independently represent a hydrogen atom, a C1-4 alkyl group or a C1-4 alkoxy group) and salts thereof.
Inventors:
HIGETA TAKAHIRO (JP)
HATTORI YU (JP)
NAKAMURA MITSUNORI (JP)
NISHIGUCHI TAKUTO (JP)
HATTORI YU (JP)
NAKAMURA MITSUNORI (JP)
NISHIGUCHI TAKUTO (JP)
Application Number:
PCT/JP2016/064987
Publication Date:
November 24, 2016
Filing Date:
May 20, 2016
Export Citation:
Assignee:
NIPPON KAYAKU KK (JP)
POLATECHNO CO LTD (JP)
POLATECHNO CO LTD (JP)
International Classes:
C09B43/124; G02B5/30; G02F1/1335
Domestic Patent References:
| WO2016021730A1 | 2016-02-11 |
Foreign References:
| JP2005344071A | 2005-12-15 | |||
| JP2009155364A | 2009-07-16 | |||
| JP2007084803A | 2007-04-05 | |||
| JP2006182846A | 2006-07-13 | |||
| JP2001240762A | 2001-09-04 | |||
| JP2009132794A | 2009-06-18 | |||
| US2519651A | 1950-08-22 |
Other References:
BONPEI YAMADA: "Studies on the Azo Dyes with s-Triazine-type and Urea-type", JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY, vol. 20, no. 4, 1962, Japan, pages 386 - 394, XP055331160
Attorney, Agent or Firm:
ASAMURA PATENT OFFICE, p.c. (JP)
特許業務法人浅村特許事務所 (JP)
特許業務法人浅村特許事務所 (JP)
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