发明授权
- 专利标题： Process for the production of polyester
- 专利标题（中）： 聚酯生产工艺
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申请号： US799758申请日： 1985-11-19
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公开(公告)号： US4612363A公开(公告)日： 1986-09-16
- 发明人: Isao Sasaki , Hiroshi Mori , Masaharu Fujimoto
- 申请人： Isao Sasaki , Hiroshi Mori , Masaharu Fujimoto
- 申请人地址： JPX both of JPX both of
- 专利权人： Mitsubishi Rayon Co., Ltd.,Research Association for Synthetic Fiber Technology
- 当前专利权人： Mitsubishi Rayon Co., Ltd.,Research Association for Synthetic Fiber Technology
- 当前专利权人地址： JPX both of JPX both of
- 优先权： JPX59-243378 19841120
- 主分类号： C08G63/00
- IPC分类号： C08G63/00 ; C08G63/78 ; C08G63/04 ; C08G63/22
摘要：
A process for the production of polyester comprising at least 80% of an ethylene terephthalate repeating unit using as a starting material an ester compound made mainly of terephthalic acid and ethylene glycol or an oligomer thereof is disclosed. This process is characterized in that a prepolymer having an intrinsic viscosity of not more than 0.4 dl/g and a carboxyl terminal group concentration [COOH] of not more than 90.times.[.eta.].sup.-0.4 .mu.eq/g is fed to a final polymerization unit and polymerized in the form of a molten thin film having a thickness of from 0.005 to 0.15 mm.
公开/授权文献
- USD252535S Combined storage and carrying case for art supplies 公开/授权日：1979-07-31
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