发明授权
- 专利标题： LATE ADDITION OF SUPPLEMENTAL ETHYLENE GLYCOL IN THE PREPARATION OF COPOLYESTERS
- 专利标题（中）： 补充乙二醇作者共聚多酯生产后加
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申请号： EP98914601.4申请日： 1998-04-07
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公开(公告)号： EP1019445B1公开(公告)日： 2005-06-01
- 发明人: JERNIGAN, Mary, Therese , GREENE, Carol, Julliard , WINDES, Larry, Cates
- 申请人： EASTMAN CHEMICAL COMPANY
- 申请人地址： 100 North Eastman Road Kingsport, TN 37660 US
- 专利权人： EASTMAN CHEMICAL COMPANY
- 当前专利权人： EASTMAN CHEMICAL COMPANY
- 当前专利权人地址： 100 North Eastman Road Kingsport, TN 37660 US
- 代理机构： Brown, Fraser Gregory James
- 优先权： US43487P 19970409; US40867 19980318
- 国际公布： WO1998045350 19981015
- 主分类号： C08G63/78
- IPC分类号： C08G63/78 ; C08G63/199 ; C08G63/183
摘要：
The application is directed to a method for making copolyesters of terephthalic acid and a diol component including ethylene glycol and includes the steps of adding teraphthalic acid and diol to a first esterification reactor and then late addition of supplemental ethylene glycol subsequent to the first esterification reactor but prior to a point where the ethylene glycol partial pressure is reduced below about 300 torr.
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