| 摘要 |
<p>NEW MATERIAL:A compound shown by formula I (X is halogen or 1-4C alkyl); Y is H or alkali metal]. USE:A raw material for polyester imides, having good melting properties and useful for melt copolymerization. PREPARATION:A 1,4-diaminobenzene derivation shown by formula II is reacted with trimellitic anhydride in a solvent such as dimethylacetamide, etc., at 150-180 deg.C at normal pressure or under pressure for 5-10hr to give a compound shown by formula I. The reaction is preferably carried out in an inert gas flow such as nitrogen, argon, etc., Then the reaction solution is optionally treated with an aqueous solution of an alkali metallic salt to give an alkali metallic salt of the compound shown by the formula I. The amount of trimellitic anhydride used is 2mols based on 1mol compound shown by formula II.</p> |
