Patent ID: 6790490
Filing Date: 2004-09-14
Classification: C08L,C09B,C09K,G02B,G02F

Abstract:
A polyvinyl alcohol polarizing film containing, in a substrate for the polarizing film, a water soluble dye represented by the following formula (1) in the form of a free acid: wherein A represents the following formula (3) wherein X represents a nitro group or an amino group, B represents the following formula (5) wherein R6 represents a hydrogen atom, hydroxyl group, substituted or unsubstituted amino group, methyl group, ethyl group, methoxy group, ethoxy group, R7 represents a hydrogen atom, hydroxyl group, substituted or unsubstituted amino group, methyl group, ethyl group, methoxy group, ethoxy group in the formula (5), and n is 0 or 1, and R1, R2, R3, R4 each independently represents a hydrogen atom, methyl group, ethyl group, methoxy group, ethoxy group and acetyl amino group; or a copper complex salt of said acid.