Dye containing polarizing film

Details Dye containing polarizing film Dye containing polarizing film

G - Physics

02

B

G02B 5/30 (2006.01)

Patent

CA 2124416

ABSTRACT A dye-containing polarizing film having neutral color which comprises at least one disazo dye represented by the formula (I) in the form of the free acid Image (I) wherein Me is a transition metal selected from copper, nickel, zinc and iron, A1 is phenyl or naphthyl which may be substituted or substituted. B1 is 1-naphthol or 2-naphthol residue which may be unsubstituted or substituted and in which its hydroxy group is adjacent to the azo group and is linked with the transition metal Me to form the complex, and R1 is a lower alkoxy; and at least two of other specific dyes, and the film causes no light to break through the film at dark state within the visible radiation wavelength region and is excellent in the polarizing activities as well as the durability to water and heat.

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