Azo compounds, and dye-based polarizing films and polarizing plates comprising the same

Patent metadata

Field	Value
Publication number	US-9354371-B2
Application number	US-99364309-A
Country	US
Kind code	B2
Filing date	May 19, 2009
Priority date	May 20, 2008
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

Azo compounds represented by formula (1) or (2) (In the formulas, A represents a phenyl group or naphthyl group that has at least 1 substituent. R 1 -R 4 represent a hydrogen atom, lower alkyl group or lower alkoxy group, with at least one of R 1 -R 4 being a lower alkoxy group that has a sulfone group. X represents an optionally substituted amino group, optionally substituted benzoylamino group, optionally substituted phenylamino group, optionally substituted phenyl azo group or optionally substituted naphthotriazole group) and salts thereof.

First claim

The invention claimed is:

1. A dye-based polarizing film comprising a polarizing film base containing an azo compound and/or a salt thereof represented by Formula (1):

wherein A is represented by Formula (7):

wherein one of R 11 and R 12 is a sulfone group and the other represents a sulfone group, a lower alkyl group, a lower alkoxyl group, a carboxyl group, an amino group or a substituted amino group; or A is represented by Formula (8):

wherein R 13 represents a hydrogen or a lower alkoxyl group having a sulfone group, and n represents 1 to 3; at least one of R 1 to R 4 is a lower alkoxyl group having a sulfone group and the remaining ones each independently represent a hydrogen atom, a lower alkyl group or a lower alkoxyl group, X represents a benzoylamino group that may have a substituent, a phenylamino group that may have a substituent, or a naphthotriazole group that may have a substituent.

2. The dye-based polarizing film according to claim 1 , wherein X is a benzoylamino group that may have a substituent, a phenylamino group that may have a substituent, or a naphthotriazole group that may have a substituent, and these substituents are a hydrogen atom, a lower alkyl group, a lower alkoxyl group, a hydroxyl group, a carboxyl group, a sulfone group, an amino group or a substituted amino group.

3. The dye-based polarizing film according to claim 1 , wherein X is a phenylamino group represented by Formula (3)

wherein R 5 and R 6 each independently represent a hydrogen atom, a methyl group, a methoxy group, a sulfone group, an amino group or substituted amino group.

4. The dye-based polarizing film according to claim 1 , wherein X is a benzoylamino group represented by Formula (4)

wherein R 7 represents a hydrogen atom, a hydroxyl group, an amino group or a substituted amino group.

5. The dye-based polarizing film according to claim 1 , wherein X is a naphthotriazole group represented by Formula (5)

wherein m represents 1 or 2.

6. The dye-based polarizing film according to claim 1 , wherein A is represented by Formula (7)

wherein one of R 11 and R 12 is a sulfone group and the other represents a sulfone group, a lower alkyl group, a lower alkoxyl group, a carboxyl group, an amino group or a substituted amino group.

7. The dye-based polarizing film according to claim 1 , wherein A is represented by Formula (8)

wherein R 13 represents a hydrogen atom, a lower alkoxyl group having a sulfone group, and n represents 1 to 3.

8. The dye-based polarizing film according to claim 1 , wherein at least one of R 1 to R 4 is a sulfopropoxy group or a sulfobutoxy group and the remaining ones are each independently a hydrogen atom, a methyl group or a methoxy group.

9. The dye-based polarizing film according to claim 1 , further comprising at least one organic dye other than the azo compound and/or a salt thereof.

10. The dye-based polarizing film according to any one of claims 1 and 9 , wherein the polarizing film base is a film comprising a polyvinyl alcohol resin or a derivative thereof.

11. A dye-based polarizing plate that can be obtained by attaching a transparent protecting layer to at least one of surfaces of a dye-based polarizing film according to any one of claims 1 and 9 .

12. A polarizing plate for a liquid crystal display using a dye-based polarizing film according to claim 10 .

13. A polarizing plate for a liquid crystal display using a dye-based polarizing plate according to claim 11 .

14. A color polarizing film, for a liquid crystal projector using a dye-based polarizing film according to claim 10 .

15. A color polarizing plate, for a liquid crystal projector using a dye-based polarizing plate according to claim 11 .

16. A liquid crystal display device using the polarizing plate for a liquid crystal display according to claim 12 .

17. A liquid crystal display device using the polarizing plate for a liquid crystal display according to claim 13 .

18. A liquid crystal display device using the color polarizing film for a liquid crystal projector according to claim 14 .

19. A liquid crystal display device using the color polarizing plate for a liquid crystal projector according to claim 15 .

Assignees

• Nishiguchi Takuto
• Ohno Hiroaki
• Higeta Takahiro
• Sadamitsu Yuichi
• Nippon Kayaku Kk
• Polatechno Co Ltd

Inventors

• Nishiguchi Takuto
• Ohno Hiroaki
• Higeta Takahiro
• Sadamitsu Yuichi

Classifications

• Y10T428/1041

  Cross-Sectional Technologies · mapped topic

• C09B31/043

  Amino-benzenes · CPC title

• B32B2457/202

  LCD, i.e. liquid crystal displays · CPC title

• C09B31/16

  Trisazo dyes · CPC title

• G02B5/3033 Primary

  in the form of a thin sheet or foil, e.g. Polaroid · CPC title