Azo compound and dye polarizing film containing the same

• US 8,940,059 B2
• Filed: 12/21/2010
• Issued: 01/27/2015
• Est. Priority Date: 06/22/2006
• Status: Expired due to Fees

• Current Assignee: Nippon Kayaku Company Limited, Polatechno Co.,Ltd.
• Original Assignee: Nippon Kayaku Company Limited, Polatechno Co.,Ltd.
• Inventors: Sadamitsu, Yuichi, Higeta, Takahiro
• Primary Examiner(s): Nguyen, Tri V
• Application Number:
  US12/974,581
• Publication Number:
  US 20110089383A1
• Time in Patent Office: 1,498 Days
• Field of Search: 252500-585, 428/1.31, 534/577, 534/573, 534/689, 534/704, 845/9, 850/6, 864/8, 866/4, 868/1, 868/7
• US Class Current: 8/662
• CPC Class Codes: C09B 31/08 from a coupling component "C" containing directive hydroxyl and amino groups
• CPC Class Codes: C09B 31/22 from a coupling component "D" containing directive hydroxyl and amino groups
• CPC Class Codes: C09B 45/28 containing copper
• CPC Class Codes: C09B 56/08 Styryl-azo dyes
• CPC Class Codes: C09K 2323/031 Polarizer or dye
• CPC Class Codes: G02B 5/3033 in the form of a thin sheet or foil, e.g. Polaroid

Abstract

Disclosed is an azo compound represented by the formula (1) below, a salt thereof, or a copper complex salt compound thereof.

(In the formula, R1 and R2 independently represent a hydrogen atom, a sulfonic acid group, a lower alkyl group or a lower alkoxyl group; R3-R6 independently represent a hydrogen atom, a lower alkyl group or a lower alkoxyl group; R7 represents a lower alkyl group or a lower alkoxyl group; and n represents 0 or 1.)

Claims

1. An azo compound represented by the formula (1) below, a salt thereof or a copper complex salt compound thereof:

2. The azo compound, a salt thereof or a copper complex salt compound thereof according to claim 1, wherein R7 is either a methyl group or a methoxy group.

3. The azo compound, a salt thereof or a copper complex salt compound thereof according to claim 1, wherein at least one of R1 and R2 is a sulfonic acid group.

4. The azo compound, a salt thereof or a copper complex salt compound thereof according to claim 1, wherein R1 is at an ortho-position relative to an azo group and R2 is at a para-position relative to an azo group.

5. The azo compound, a salt thereof or a copper complex salt compound thereof according to claim 1, wherein R3 to R6 each independently represent a hydrogen atom, a methyl group or a methoxy group.

6. The azo compound, a salt thereof or copper complex salt compound thereof according to claim 1, wherein R1 is at the ortho-position relative to the azo group;

R2 is at the para-position relative to the azo group;

at least one of R1 and R2 is a sulfonic acid group;

R3 to R6 each independently represents a hydrogen atom, a methyl group or methoxy group; and

R7 is either a methyl group or a methoxy group.

7. A dye-containing polarizing film comprising one or more azo compounds and/or salts thereof or copper complex salt compounds thereof according to claim 1 in a polarizing film base material.

8. A dye-containing polarizing film comprising one or more azo compounds and/or salts thereof or copper complex salt compounds thereof according to claim 1 and one or more other organic dyes in a polarizing film base material.

9. A dye-containing polarizing film comprising two or more azo compounds and/or salts thereof or copper complex salt compounds thereof according to claim 1 and one or more other organic dyes in a polarizing film base material.

10. The dye-containing polarizing film according to any one of claims 7 to 9 wherein the polarizing film base material is a film comprising a polyvinyl alcohol resin.

11. A dye-containing polarizing plate comprising a dye-containing polarizing film according to claim 10 and a transparent protective film adhered to at least one surface thereof.

12. A polarizing plate for a liquid crystal display comprising a dye-containing polarizing plate according to claim 11.

13. A color polarizing plate for a liquid crystal projector comprising a dye-containing polarizing plate according to claim 11.