| 摘要 |
PURPOSE:To purify an aliphatic double bond-containing imide compound containing impurities, particularly an amic acid compound, by separating and removing the impurity from the imide compound with an organic solvent selected from halogenated hydrocarbons, aliphatic esters and aliphatic ketones. CONSTITUTION:A polyamine expressed by the formula R-(NH2)n (R is organic group containing at least 2 carbon atoms; n is an integer >=2), e.g. 4,4'-diaminodiphenylmethane, is reacted with an aliphatic double bond-containing carboxylic acid anhydride or a derivative thereof, e.g. maleic anhydride, in an amount of 0.95mol or more based on 1mol NH2 group in the above-mentioned polyamine to give a crude double bond-containing imide compound, which is then dissolved in a solvent selected from halogenated hydrocarbons, aliphatic esters and aliphatic ketones, preferably methylene chloride, methyl acetate or acetone, to separate and remove insoluble impurities and purify the imide compound.
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