Poly-azo compound, and polarization film having said compound
AssigneeSumitomo Chemical Company, Limited
InventorsToru Ashida, Narutoshi Hayashi
Life of this patent
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Abstract
Poly-azo compound selected from the group consisting compounds of the formula (I) and compounds of the formula (II), (wherein, Me represents copper, nickel, zinc or iron, A represents a naphthyl group having 1 to 3 sulfonic groups and further optionally having an alkyl group or alkoxy group, R1 and R2 represent each independently a hydrogen atom, alkyl group or alkoxy group, and R3 represents an amino group or hydroxyl group.).
Claims5
The polarization film comprising a dye for polarization film containing a poly-azo compound selected from the group consisting of compounds of the formula (I) and compounds of the formula (II),
- wherein, Me represents copper, nickel, zinc or iron, A represents a naphthyl group having 2 sulfonic groups and further optionally having an alkyl group or alkoxy group, R1 and R2 each independently represents a hydrogen atom or alkyl group, and R3 represents an amino group or a hydroxyl group;
- and a polarization film substrate.
Dependencies are inferred from the claim text.