Azo compounds and polarizing films using the compounds

Details Azo compounds and polarizing films using the compounds Azo compounds and polarizing films using the compounds

1997-02-18

1997-12-16

Schofer, Joseph L.

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

Organic compounds

Azo

534704, 534716, 534797, 534829, 534834, 8662, C09B 5604, C09B 4500, C09B 4524, C09B 3502, C09B 3102

Patent

active

056986823

ABSTRACT:
The present invention provides a polarizing film having high heat resistance and a high degree of polarization and excellent optical properties by dyeing a polymer film with a novel azo compound represented by the following formula (1) or (2): ##STR1##

REFERENCES:
patent: 2769805 (1956-11-01), Hanhart
patent: 2831848 (1958-04-01), Riat et al.
patent: 2837507 (1958-06-01), Riat et al.
patent: 5318856 (1994-06-01), Misawa et al.
Chemical Abstracts, vol. 102, 26357w, "Water-Soluble Disazo Compounds", Aug. 20, 1984--Japanese Laid-Open Patent No. 59-145255. (Abstract Only).
Chemical Abstracts, vol. 104, 70283j, "Water-Soluble Disazo Compounds", Aug. 16, 1985--Japanese Laid-Open Patent No. 60-156759. (Abstract Only).
Chemical Abstracts, vol. 104, 69953w, "Colored Poly(Vinyl Alcohol) Films", Sep. 2, 1985--Japanese Laid Open Patent No. 60-168743. (Abstract Only).
Chemical Abstracts, vol. 115, 266442g, "Dichroic Dye Polarizer Film", Mar. 25, 1991, Japanese Laid Open Patent No. 68902. (Abstract Only).
Chemical Abstracts, vol. 116, 224369d, "Dyed Polarizer Film", Apr. 15, 1991, Japanese Laid Open Patent No. 89203. (Abstract Only).

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