发明名称 |
Polyether and its production process |
摘要 |
A process for producing a polyether having at least one hydroxy group by subjecting a cyclic monomer to ring-opening addition polymerization to an initiator having a hydroxy group in the presence of a double metal cyanide complex catalyst, comprising the following steps: initial step: supplying the cyclic monomer in an amount of 5 to 20 mass percent of the initiator to a reaction system containing the initiator and the catalyst, to carry out reaction, wherein the reaction system temperature when supply of the cyclic monomer is started is from 120 to 165° C., and the maximum temperature of the reaction system after supply of the cyclic monomer is higher by from 15 to 50° C. than the temperature when supply of the cyclic monomer is started; and polymerization step: supplying the cyclic monomer to the reaction system after the initial step to carry out ring-opening addition polymerization.
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申请公布号 |
US8445625(B2) |
申请公布日期 |
2013.05.21 |
申请号 |
US201213434947 |
申请日期 |
2012.03.30 |
申请人 |
SUZUKI CHITOSHI;ARAI TAKEAKI;FURUMI MASAHITO;TANAKA HIDEAKI;SASAKI TAKAYUKI;HORIE AKIO;ASAHI GLASS COMPANY, LIMITED |
发明人 |
SUZUKI CHITOSHI;ARAI TAKEAKI;FURUMI MASAHITO;TANAKA HIDEAKI;SASAKI TAKAYUKI;HORIE AKIO |
分类号 |
C08G64/00;C08G63/02 |
主分类号 |
C08G64/00 |
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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