초록 ▼

The present invention relates to a dye-containing light-polarizing film wherein a disazo dye represented by the formula (I) is used: [Figure] (I) 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

The present invention relates to a dye-containing light-polarizing film wherein a disazo dye represented by the formula (I) is used: [Figure] (I) 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 C1-C4 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 C1-C4 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.

대표청구항 ▼

A dye-containing light-polarizing film comprising a dichroic dye absorbed into a high polymer film, in which said dichroic dye is a water-soluble copper-, nickel-, zinc- or iron-containing diazo dye represented by formula (I) as a free acid [Figure] (I) wherein Me represents a transition metal selec

A dye-containing light-polarizing film comprising a dichroic dye absorbed into a high polymer film, in which said dichroic dye is a water-soluble copper-, nickel-, zinc- or iron-containing diazo dye represented by formula (I) as a free acid [Figure] (I) wherein Me represents a transition metal selected from the group consisting of copper, nickel, zinc and iron; R represents a 1-naphthol or 2-naphthol residue which is bonded to the azo group at the position adjacent to the hydroxyl group forming a complex bond together with the transition metal and which may have a substituent selected from the group consisting of sulfonic acid, sulfonamide, amino, acylamino, arylamino and hydroxyl not adjacent to the azo group; X and Y represent hydrogen, C1-C4 alkyl, lower alkoxy, carboxylic acid, sulfonic acid, sulfonamide, amino, acylamino, nitro or halogen; and Z represents hydrogen, C1-C4 alkyl or lower alkoxy; said formula (I) having from 1 to 3 sulfonic acid groups.