| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide polyindigo film easy to reprocess and high in heat resistance. <P>SOLUTION: The polyindigo film is formed from a polymer composed of recurring units each represented by formula (1), formula (2) or formula (3) [wherein, R<SP>1</SP>to R<SP>8</SP>are each H, a halogen atom, lower alkyl, (substituted) phenyl or (substituted) benzyl]. The polymer is obtained by using a diketobenzodipyrrole protected with acetyl group or the like and cutting off the protective group along with making an oxidative polymerization. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
