| 摘要 |
PURPOSE:To obtain the titled polyether, containing little gelatinous material and having improved heat, chemical and hydrolytic resistance, by polycondensing a specific dihydric phenol with specific dihalobenzenoid compound in the presence of potassium carbonate and sodium sulfate in a polar solvent. CONSTITUTION:One or more dihydric phenols, preferably hydroquinone are polycondensed with one or more dihalobenzenoid compound having an electron attractive group at least one position of the o- or p-positions to the halogen atom, preferably 4,4'-difluorobenzophenone, etc., preferably at 1:1 molar ratio in the presence of potassium carbonate, preferably at 1.00-1.10 molar ratio of the potassium carbonate to the monomer and sodium sulfate, preferably in an amount of 1.0-300g based on 1mol monomer in a polar solvent, e.g. dimethyl sulfoxide, etc., to afford the aimed polyether.
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