| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compound or a salt thereof, capable of producing a polarizing membrane exhibiting a high degree of polarization. <P>SOLUTION: This compound expressed by formula (I) [wherein, D is phenyl having 1-3 sulfo groups, or naphthyl having 1-3 sulfo groups, and H contained in the phenyl and naphthyl may be replaced with 1-8C alkyl or 1-8C alkoxy; R<SP POS="POST">1</SP>is 1-8C alkyl; and R<SP POS="POST">2</SP>is 1-4C alkyl or trifluoromethyl] or the salt thereof is provided. <P>COPYRIGHT: (C)2012,JPO&INPIT |
