Patent ID: 9354371
Filing Date: 2016-05-31
CPC Classification: B32B,C09B,C09K,G02B,G02F

Claim Text:
1. A dye-based polarizing film comprising a polarizing film base containing an azo compound and/or a salt thereof represented by Formula (1): wherein A is represented by Formula (7): wherein one of R 11 and R 12 is a sulfone group and the other represents a sulfone group, a lower alkyl group, a lower alkoxyl group, a carboxyl group, an amino group or a substituted amino group; or A is represented by Formula (8): wherein R 13 represents a hydrogen or a lower alkoxyl group having a sulfone group, and n represents 1 to 3; at least one of R 1 to R 4 is a lower alkoxyl group having a sulfone group and the remaining ones each independently represent a hydrogen atom, a lower alkyl group or a lower alkoxyl group, X represents a benzoylamino group that may have a substituent, a phenylamino group that may have a substituent, or a naphthotriazole group that may have a substituent.