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    • 9. 发明授权
    • Thiodiglycol polycarbonates
    • 硫二甘醇聚碳酸酯
    • US4054597A
    • 1977-10-18
    • US687437
    • 1976-05-17
    • Heinrich KrimmHans-Josef BuyschHermann Schnell
    • Heinrich KrimmHans-Josef BuyschHermann Schnell
    • C08G18/46C08G64/02C07C149/14C08G63/62
    • C08G64/025C08G18/4676
    • The present invention relates to an interfacial process for the production of polycarbonates having terminal, aliphatically bonded hydroxyl groups by reacting predominantly dihydric alcohols with phosgene or chlorocarbonic acid esters of predominantly dihydric alcohols and/or phenols using alkali liquors as HCl-binding agents and in the presence of inert solvents, the process according to the invention being distinguished by the fact that concentrated, aqueous alkali liquors are used as the HCl-binding agents and thiodiglycol, optionally mixed with additional monohydric and polyhydric alcohols, is used as the dihydric alcohol. The present invention further relates to the new polycarbonates produced according to the novel process and to the use of these new polycarbonates for the production of polyurethane plastics.
    • 本发明涉及通过使用碱金属作为HCl结合剂,主要使二元醇与主要为二元醇和/或酚的光气或氯代碳酸酯主要反应的具有末端脂族键合羟基的聚碳酸酯的界面方法, 惰性溶剂的存在,根据本发明的方法的区别在于使用浓缩的碱水溶液作为HCl结合剂,并且任选与另外的一元醇和多元醇混合的硫二甘醇用作二元醇。 本发明还涉及根据新方法生产的新的聚碳酸酯以及这些新的聚碳酸酯用于生产聚氨酯塑料的用途。