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公开(公告)号:US5484875A
公开(公告)日:1996-01-16
申请号:US444703
申请日:1995-05-19
IPC分类号: C08G64/14 , C08G64/00 , C08G64/04 , C08G64/20 , C08G64/30 , C08G64/40 , C08K3/00 , C08K3/24 , C08K5/00 , C08K5/1515 , C08K5/36 , C08K5/42 , C08K5/52 , C08L69/00 , C08G63/02
CPC分类号: C08G64/307
摘要: The present invention relates to a method for preparing copolymeric polycarbonates which comprises melt polycondensing a mixture of an aromatic dihydroxy compound containing an amount of 2-90 mol % of hydroquinone or substituted hydroquinones and a diester carbonate in the presence of a catalyst containing an alkali metal compound or an alkaline earth metal compound in an amount of 1.times.10.sup.-8 to 5.times.10.sup.-6 mole per mole of the total amount of the aromatic dihydroxy compound, then adding an acidic compound to the melt polycondensation product.
摘要翻译: 本发明涉及制备共聚聚碳酸酯的方法,该方法包括在含有碱金属的催化剂存在下熔融缩聚含有2-90mol%氢醌或取代的氢醌的二芳基二羟基化合物和二酯的混合物 化合物或碱土金属化合物,其量为每摩尔芳族二羟基化合物总量为1×10 -8至5×10 -6摩尔,然后向熔融缩聚产物中加入酸性化合物。
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2.
公开(公告)号:US5324809A
公开(公告)日:1994-06-28
申请号:US903318
申请日:1992-06-24
IPC分类号: C08G64/14 , C08G64/00 , C08G64/04 , C08G64/20 , C08G64/30 , C08G64/40 , C08K3/00 , C08K3/24 , C08K5/00 , C08K5/1515 , C08K5/36 , C08K5/42 , C08K5/52 , C08L69/00
CPC分类号: C08G64/307
摘要: The present invention relates to a method of preparing a copolymeric polycarbonate which comprises melt-polycondensing a mixture of an aromatic dihydroxy compound comprising hydroquinone or substituted hydroquinones and a diester carbonate in the presence of a catalyst containing alkali metal compounds and/or alkaline earth metal compounds.
摘要翻译: 本发明涉及制备共聚聚碳酸酯的方法,该方法包括在含有碱金属化合物和/或碱土金属化合物的催化剂存在下,将包含氢醌或取代的氢醌的芳族二羟基化合物和二酯碳酸酯的混合物熔融缩聚 。
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公开(公告)号:US5418315A
公开(公告)日:1995-05-23
申请号:US212077
申请日:1994-03-14
IPC分类号: C08G64/14 , C08G64/00 , C08G64/04 , C08G64/20 , C08G64/30 , C08G64/40 , C08K3/00 , C08K3/24 , C08K5/00 , C08K5/1515 , C08K5/36 , C08K5/42 , C08K5/52 , C08L69/00 , C08G63/02
CPC分类号: C08G64/307
摘要: The method of this invention prepares copolymeric polycarbonates which have excellent mechanical properties, heat resistance and transparency, and which also have improved chemical resistance, hue, and residence stability by inducing the melt polycondensation of an aromatic dihydroxy compound containing an amount of 2-90 mol % of hydroquinone and/or substituted hydroquinones with a diester carbonate in the presence of a catalyst containing alkali metal compounds and/or alkaline earth metal compounds in an amount of 1.times.10.sup.-8 to 5.times.10.sup.-6 mole per mole of the total amount of the aromatic dihydroxy compound.
摘要翻译: 本发明的方法制备具有优异的机械性能,耐热性和透明性的共聚聚碳酸酯,并且还通过引入含量为2-90mol的芳族二羟基化合物的熔融缩聚而具有改善的耐化学性,色调和停留稳定性 在含有碱金属化合物和/或碱土金属化合物的催化剂的存在下,每摩尔芳族化合物的总量为1×10 -8至5×10 -6摩尔的量的氢醌和/或取代的氢醌与二酯碳酸酯 二羟基化合物。
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