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公开(公告)号:US5777064A
公开(公告)日:1998-07-07
申请号:US615466
申请日:1996-03-14
CPC分类号: C08G64/406 , B29C47/76 , B29C67/246 , B29C47/0009 , B29K2069/00
摘要: A method of producing a polycarbonate excellent in the hue, the thermal stability, and the electrolysis stability by supplying a polycarbonate obtained by a transesterification method to an extruder having vent(s), melting the polycarbonate, and adding an acidic compound to the molten polycarbonate followed by kneading to continuously devolatilize low molecular weight compounds remaining in the polycarbonate. Better result is obtained by adding water to the kneaded mixture of the polycarbonate and the acidic compound before devolatilizing the low molecular weight compounds.
摘要翻译: 通过将通过酯交换方法获得的聚碳酸酯供给到具有排气口的挤出机,熔融聚碳酸酯并将酸性化合物加入到熔融聚碳酸酯中的方法,制备具有优异色调,热稳定性和电解稳定性的聚碳酸酯的方法, 然后捏合以使剩余在聚碳酸酯中的低分子量化合物脱挥发分。 在将低分子量化合物脱挥发分之前,通过向聚碳酸酯和酸性化合物的捏合混合物中加水来获得更好的结果。