| 摘要 |
PURPOSE:To obtain the titled injection-moldable polymer having excellent heat- resistance, rigidity, etc., by acylating p-hydroxybenzoic acid, an aromatic dihydroxy compound and a dicarboxylic acid, etc., and polymerizing the acylated compounds. CONSTITUTION:The objective polymer having a melt viscosity of preferably 10-15,000 poise and containing a structural unit of formula I-III (R1-R3 are bivalent aromatic group, etc.) wherein the amount of I+II is 77-95mol%, that of III is 23-5mol% and the molar ratio of I/II is 75/25-95/5 can be produced by (1) charging (A) p-hydroxybenzoic acid, (B) an aromatic dihydroxy compound (e.g. 4,4'-dihydroxybiphenyl), (C) an aromatic dicarboxylic acid (e.g. terephthalic acid) and (D) ethylene glycol together with e.g. acetic anhydride, (2) acylating the compounds preferably at room temperature-320 deg.C and (3) carrying out the polymerization under reduced pressure at 250-320 deg.C while removing acetic acid from the product. The component D may be an oligomer with the component C, etc.
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