Sumitomo Chemical Company, Limited

Setsuko Yamamoto

Takashi Omura

Kazuya Ogino

Narutoshi Hayashi

Kaneo Yokoyama

Narutohsi Hayashi

A dye-containing polarizing film having neutral color which comprises at least one disazo dye represented by the formula (I) in the form of the free acid

Dye containing polarizing film

An azo compound of the following formulae (I) or (II): ##STR1## wherein Q.sub.1 represents a phenyl group or a naphthyl group, Q.sub.2 represents a phenyl group; R represents hydroxy group; R.sub.1 and R.sub.2 each independently represent a hydrogen atom, a hydroxy group, a C.sub.1 -C.sub.4 alkyl group, a C.sub.1 -C.sub.4 alkoxy group or a halogen atom; R.sub.3 and R.sub.4 each independently represent a hydrogen atom, a hydroxy group, a C.sub.1 -C.sub.4 alkyl group, a C.sub.1 -C.sub.4 alkoxy group or a substituted amino group; and X represents --NH--, --NHCO-- or --N.dbd.N--; or a salt thereof; and a polarizing film containing the same.

Azo compound and a polarizing film containing the same

A dye-containing polarizing film which comprises at least one dye selected from:

Growing community of inventors

Toyonaka, Japan

Setsuko Yamamoto