发明授权
US5463020A Preparation of polytetrahydrofuran or tetrahydrofuran/alkylene oxide
copolymers
失效
聚四氢呋喃或四氢呋喃/烯化氧共聚物的制备
- 专利标题: Preparation of polytetrahydrofuran or tetrahydrofuran/alkylene oxide copolymers
- 专利标题(中): 聚四氢呋喃或四氢呋喃/烯化氧共聚物的制备
-
申请号: US268954申请日: 1994-06-30
-
公开(公告)号: US5463020A公开(公告)日: 1995-10-31
- 发明人: Rainer Becker , Michael Huellmann , Christof Palm , Wolfgang Franzischka
- 申请人: Rainer Becker , Michael Huellmann , Christof Palm , Wolfgang Franzischka
- 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: DEX4325023.8 19930726
- 主分类号: C08G65/06
- IPC分类号: C08G65/06 ; C08G65/02 ; C08G65/20 ; C08G65/26 ; C08G65/10
摘要:
Polytetrahydrofuran or C.sub.2 -C.sub.10 -alkylene oxide/tetrahydrofuran copolymers having a molecular weight of from 250 to 20,000 Dalton are prepared by the cationic polymerization of tetrahydrofuran or tetrahydrofuran and C.sub.2 -C.sub.10 -alkylene oxides in the prsence of a promoter by a process in which the catalyst used is a mixture of one or more C.sub.2 -C.sub.6 -di- or tricarboxylic acids with boric acid.
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