| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polyisoimide resin having high solubility and thermoplasticity, and a method for producing a polyimide resin. <P>SOLUTION: The polyisoimide resin is obtained using 1,1'-bicyclohexane-3,3',4,4'-tetracarboxylic acid-3,3',4,4'-dianhydride as an acid component, contains at least one of three repeating units in which nitrogen atoms of an isoimide ring are present in 3,3'-, 4,4'- and 3,4'-positions, and has a melting point of ≤300°C and an isoimide to imide conversion temperature higher than the melting point. There are also provided a method for producing a polyimide resin using the polyisoimide resin and a method for producing the polyisoimide resin using a polyamic acid resin or a polyamic acid ester resin. <P>COPYRIGHT: (C)2012,JPO&INPIT |
