申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0621317A1
公开(公告)日:1994-10-26
The present invention is concerned with a novel azo compound represented by formula (1), (2) or (3), a water-soluble dye comprising this azo compound, and a polarizing film containing this azo compound. The obtained polarizing film has high hydrothermoresistance and a high polarization degree and is excellent in optical characteristics:
wherein each of R₁, R₃ and R₁₂ is independently a hydrogen atom, halogen atom, hydroxyl group, alkyl group having 1 or 2 carbon atoms, or alkoxy group having 1 or 2 carbon atoms; each of R₂, R₄, R₈ and R₉ is independently a hydrogen atom, hydroxyl group, alkyl group having 1 or 2 carbon atoms, alkoxy group having 1 or 2 carbon atoms, or acetylamino group; R₅ is a hydroxyl group or amino group at the o-position or p-position to the azo group; each of R₆ and R₁₀ is a hydrogen atom, carboxyl group, or alkoxy group having 1 or 2 carbon atoms; each of R₇ and R₁₁ is a hydrogen atom, hydroxyl group, amino group, methylamino group, β-hydroxy-ethylamino group, acetylamino group, or phenylamino or benzoylamino group in which the phenyl nucleus may be substituted by a nitro group, amino group, hydroxyl group, alkyl group having 1 or 2 carbon atoms, carboxyl group, sulfonic group or chlorine atom; p is 0 or 1; and q is 0, 1 or 2.
本发明涉及一种由式(1)、(2)或(3)表示的新型偶氮化合物,一种包含这种偶氮化合物的水溶性染料,以及一种包含这种偶氮化合物的偏光膜。所获得的偏光膜具有很高的耐水醚性和偏光度,并具有优异的光学特性:
其中每个 R₁、R₃ 和 R₁₂ 独立地为氢原子、卤素原子、羟基、具有 1 或 2 个碳原子的烷基或具有 1 或 2 个碳原子的烷氧基;R₂、R₄、R₈ 和 R₉ 中的每一个都独立地为氢原子、羟基、具有 1 或 2 个碳原子的烷基、具有 1 或 2 个碳原子的烷氧基或乙酰氨基;R₅ 是位于偶氮基 o 位或 p 位的羟基或氨基;R₆ 和 R₁₀ 中的每一个都是氢原子、羧基或具有 1 或 2 个碳原子的烷氧基;R₇和 R₁₁各自是氢原子、羟基、氨基、甲氨基、β-羟乙氨基、乙酰氨基或苯基氨基或苯甲酰氨基,其中苯基核可被硝基、氨基、羟基、具有 1 或 2 个碳原子的烷基、羧基、磺酸基或氯原子取代;p 为 0 或 1;q 为 0、1 或 2。