发明名称 |
Process for producing polyetherglycol |
摘要 |
A process for producing a polyoxytetramethylene glycol or a copolymerized polyetherglycol by polymerizing tetrahydrofuran or a mixture of tetrahydrofuran with other cyclic ethers copolymerizable therewith, which comprises using a heteropoly-acid as a catalyst and permitting 0.1 to 15 mol of water per mol of the heteropolyacid to be present in the catalyst phase. The above-described polymer and copolymer are industrially useful polymers which can be used as the primary starting materials for polyurethanes to be used for a spandex and a synthetic leather, solvents, pressured fluids, etc.
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申请公布号 |
US4568775(A) |
申请公布日期 |
1986.02.04 |
申请号 |
US19840610741 |
申请日期 |
1984.05.16 |
申请人 |
ASAHI KASEI KOGYO KABUSHIKI KAISHA |
发明人 |
AOSHIMA, ATSUSHI;TONOMURA, SHOICHIRO |
分类号 |
C08G65/06;C08G65/20;(IPC1-7):C07C41/01;C07C41/02 |
主分类号 |
C08G65/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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