| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polarizing membrane whose polarization degree is still more improved, and a dye compound useful to make a polarizing membrane. <P>SOLUTION: The azo-compound is represented by formula (I) or formula (II), wherein, X represents a substituted phenyl or naphthyl; R<SP>1</SP>and R<SP>2</SP>are each a hydrogen, an alkyl or an alkoxy, n is 0 or 1; Y is an alkylene or -CH=CH-; and R<SP>3</SP>is a polar group such as a sulfo group, etc. <P>COPYRIGHT: (C)2007,JPO&INPIT |
