| 摘要 |
PURPOSE:To obtain a polyethersulfone based novel polymer of high heat resistance, molding processablility and solbent resistance, capable or regulating its galss transition temperature, by using appropriate amounts of specific compounds as copolymerization components. CONSTITUTION:A reaction is carried out in a solvent, between (A) l of dihydric phenol alkalimetal salt of formula MO-Ar-MO (Ar is of formula I , II, etc.; M is alkali metal), (B) k mole of bis (3,5-dimethyl-4-hydroxyphenyl)sulfone of formulaIII and (C) (k+lmole of 4,4'-dihalogenodiphenylsulfone of formula IV (X is halogen) (where, k and l are each integar satisfying the euqation. 0.01<=k/k+l <=0.8). The resulting product is then treated with water, thus obtaining the objective polymer haing k units of formula V and l units os formula VI, with terminal group being H or X, also having a reduced viscosity (determined in the form of 0.2g/dl N-methylpyrrolidone solution at 30 deg.C)>=0.2dl/g.
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