| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of producing a polyamideimide resin, wherein the molecular weight of the polyamideimide resin to be produced is less varied. <P>SOLUTION: The method of producing the polyamideimide resin includes: a first step of obtaining a mixture of diimide dicarboxylic acids by making trimellitic anhydride react with an alicyclic or aromatic diamine and aliphatic and siloxane diamines in an organic solvent, wherein the diimide dicarboxylic acids are represented by the respective general formulae (1a), (1b), (1c) and (1d); and a second step of making the mixture with a diisocyanate compound. The organic solvent contains a nitrogen-containing organic solvent and methyl ethyl ketone. <P>COPYRIGHT: (C)2012,JPO&INPIT |
