发明授权
- 专利标题: Method of producing polyoxytetramethylene glycol
- 专利标题(中): 生产聚氧四亚甲基二醇的方法
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申请号: US53申请日: 1998-01-22
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公开(公告)号: US6043338A公开(公告)日: 2000-03-28
- 发明人: Christoph Sigwart , Rolf Fischer , Karsten Eller , Rainer Becker , Klaus-Dieter Plitzko , Gerd Heilen
- 申请人: Christoph Sigwart , Rolf Fischer , Karsten Eller , Rainer Becker , Klaus-Dieter Plitzko , Gerd Heilen
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX19527532 19950727
- 主分类号: C08G18/48
- IPC分类号: C08G18/48 ; C08G18/67 ; C08G63/66 ; C08G65/20 ; C08G65/26 ; C08G65/28 ; C08G69/40 ; C08G61/12
摘要:
In a process for the preparation of copolymers of tetrahydrofuran and but-2-yne-1,4-diol by catalytic polymerization of tetrahydrofuran, the polymerization is carried out over a heterogeneous acidic catalyst which has acid centers of acidity pK.sub.a
公开/授权文献
- USD344947S Display pager 公开/授权日:1994-03-08