专利名称：Method for manufacturing polycarbonate
for optical use
发明人：Takato Kimura,Satoru Omori,Ryozo
Sato,Tomoaki Shimoda,Akio Kanezawa
申请号：US09376450申请日：19990818公开号：US06197917B1公开日：20010306
摘要：The specification provides a method for the manufacture of a high-qualityoptical polycarbonate that contains few inorganic or organic impurities or othermicroparticles, and that has a superior hue. Specifically, the specification provides amethod for the manufacture of a polycarbonate by the melt polycondensation of abisphenol and a carbonic diester, wherein the molten mixture of a bisphenol and acarbonic diester is filtered with a membrane filter made of a fluororesin, after which meltpolycondensation is conducted.
申请人：GENERAL ELECTRIC COMPANY
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