| 摘要 |
PURPOSE:To obtain the titled high-polymerization degree polyester outstanding in solvent and heat resistances and mechanical properties, by interfacial polycondensation with a dicarboxylic acid dichloride, using each specific bisphenol, catalyst and organic solvent. CONSTITUTION:First, an organic solvent solution is prepared by dissolving in (A) an organic solvent, i.e. a 1-10C halogenated hydrocarbon of a boiling point T >=35 deg.C (e.g. methylene dichloride) (B) pref. 1-40wt% of isophthaloyl dichloride and/or terephthaloyl dichloride. This solution is then incorporated with (C) an aqueous alkali solution of bisphenol >=50mol% of which is bis(4- hydroxyphenyl)sulfone, with a concentration e.g. 1-30wt% and (D) a phosphonium salt of formula (R1-R4 are each 1-16C hydrocarbon; X is chlorine, etc.) followed by polycondensation at (T-15)-(T+15) deg.C, thus obtaining the objective polyester.
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