Dye-containing light-polarizing film

Details Dye-containing light-polarizing film Dye-containing light-polarizing film

1992-12-18

1994-05-10

Tucker, Philip

Compositions

Light transmission modifying compositions

Producing polarized light

359490, 534713, 534716, 534719, F21V 914, G02B 530, C09B 4524

Patent

active

053105095

ABSTRACT:
The present invention relates to a dye-containing light-polarizing film wherein a disazo dye represented by the formula (I) is used: ##STR1## wherein Me represents a transition metal, being copper, nickel, zinc or iron, R represents a 1-naphthol or 2-naphthol residue which is bonded to azo group at the position adjacent to its hydroxyl group forming a complex bond together with the transition metal and which may have a substituent such as a sulfonic acid, sulfonamide, amino, acylamino or arylamino group or a hydroxyl group not adjacent to the azo group, X and Y represent a hydrogen atom, a C.sub.1 -C.sub.4 alkyl, lower alkoxy, carboxylic acid, sulfonic acid, sulfonamide, sulfonalkylamide, amino, acrylamino or nitro group or a halogen atom, and Z represents a hydrogen atom or a C.sub.1 -C.sub.4 alkyl or lower alkoxy group, said formula (I) having from 1 to 3 sulfonic acid groups.
Said dye-containing light-polarizing film, as compared with the conventional ones, not only exhibits a high durability, but also has excellent polarization performance enough to be comparable to the light-polarizing films in which iodine is used. Consequently, said dye-containing light-polarizing film is effectively used for use in displays in which liquid crystals are used and optical instruments including CRT filters.

REFERENCES:
patent: 4128544 (1978-12-01), Schneider
patent: 4514559 (1985-04-01), Sato et al.
patent: 5007942 (1991-04-01), Claussen et al.

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