Azo compound and salt thereof

Details Azo compound and salt thereof Azo compound and salt thereof

2007-12-04

2007-12-04

Powers, Fiona T (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

C534S754000, C534S763000, C252S585000, C359S491010

Reexamination Certificate

active

10552184

ABSTRACT:
The present invention relates to an azo compound represented by the following formula (1):wherein A denotes a phenyl group having 1 to 3 substituents such as sulfonic acid group, amino group, lower alkyl groups and lower alkoxyl groups, or a naphthyl group, B denotes hydrogen atom, sulfonic acid group, a lower alkyl group, a lower alkoxyl group or the like, each of R1to R4independently denotes hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxyl group or the like, D denotes —NHCO—, —N═N— or —NH—, E denotes hydrogen atom, a lower alkyl group or a phenyl group having 1 to 3 substituents such as hydroxyl group and amino group, n denotes 0 or 1, and m denotes 0 or 1, or a salt thereof, or a copper complex compound of either of them, which is used for a polarizing plate having excellent polarization performance and durability and furthermore little color leakage in visible light range.

REFERENCES:
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Chinese communication dated Feb. 16, 2007, with an English translation.
Partial translation of “Dye Chemistry” by Yutaka Hosada; Nov. 30, 1957 p. 634.
The International Search Report dated Jun. 15, 2004.

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