| 摘要 |
PURPOSE:To obtain the titled polymer which is freed from clouding during the formation of a membrane and is excellent in adhesion to bases, heat resistance, and solvent resistance, by polycondensing an aromatic dicarboxylic acid (derivative) with a specified aromatic diamine and a diphenol. CONSTITUTION:A mixture is obtained by mixing (a) an aromatic diamine of formula I (wherein R1-4 are each H, a lower alkyl, a lower alkoxy, Cl, or Br, R5-6 are each H, CH3, C2H5, C3H7, trifluoromethyl or trichloromethyl), {e.g., 2,2-bis[4-(4-aminophenoxy)phenyl]propane} with (b) a diphenol of formula II[wherein X is a 2-10C aliphatic group which may contain an ether bond, p- or m-phenylene, naphthylene or a group of formula III (wherein Y is a bond of -O-, -SO2-, formula IV, -S-, formula V, or -CH2-)]at a molar ratio, a/b, of 5/5-9/1. 90-130mol% aromatic dicarboxylic acid or its reactive acid derivative (e.g., terephthaloyl dichloride) is polycondensed with 100mol% above mixture.
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