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US 8,940,059 B2Granted
Azo compound and dye polarizing film containing the same
AssigneesNippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
InventorsYuichi Sadamitsu, Takahiro Higeta
Life of this patent
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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.)
Claims13
An azo compound represented by the formula (1) below, a salt thereof or a copper complex salt compound thereof:
- wherein R1 and R2 each independently represent a hydrogen atom, a sulfonic acid group, a lower alkyl group or a lower alkoxyl group;
- R3 to R6 each 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=1.
1 more element
Dependencies are inferred from the claim text.