| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a new polyesterimide containing a fluorenyl group and an ester group, having high transparency and high solubility, and useful for application to display materials, LED members, solar cell members, and so on, and to provide a precursor of the polyesterimide, a raw material thereof, and a method for producing them. <P>SOLUTION: A PEI precursor which includes a tetracarboxylic dianhydride unit etc. having a fluorenyl group and an ester group and represented by general formula (1) and a unit of diamines; a PEI which is formed by cyclization of the precursor; and a method for producing them are disclosed (in formula, R<SB POS="POST">1</SB>and R<SB POS="POST">2</SB>are identical to, or different from each other, and each of them represents a 1-6C alkyl group or a 6-12C cycloaliphatic group or the like, and X<SB POS="POST">1</SB>and X<SB POS="POST">2</SB>are identical to, or different from each other, and each of them represents hydrogen, an alkyl group, an alkoxy group, a halogen group, or a nitrile group). <P>COPYRIGHT: (C)2012,JPO&INPIT |
