Polarizing film

Abstract

Abstract PURPOSE:To enhance polarizing performance and to improve durability such as heat resistance and moisture resistance by incorporating the compd. expressed by the prescribed chemical formula or the copper compd. thereof into the free acid of a polarizing film formed by using a polarizing element of dye system. CONSTITUTION:The compd. expressed by the formula or the copper compd. thereof is used as the free acid of the polarizing film formed by using the polarizing element of dye system. In the formula, R1-R4 respectively independently denote a hydrogen atom, methyl group, methoxy group or ethoxy group, R5 denotes a hydrogen atom, methyl group, acetyl group. Y denotes a hydrogen atom or sulfonic acid group, n denotes 0 or 1. The polarizing film in which an azo compd. or cupriferous azo compd. is used as the polarizing element is obtd. The polarizing film having the excellent durability such as heat resistance and moisture resistance is thus obtd. and the reliability of the polarizing film is improved.

Inventors

• 👤 Tadashi Matsuo
• 👤 正 松尾

Bibliographic Details