发明名称 |
IMPROVED COPOLYETHER GLYCOL MANUFACTURING PROCESS |
摘要 |
<p>The present invention provides a process for manufacturing copolyether glycol having a mean molecular weight of from about 650 to about 5000 dalton by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. More particularly, the invention relates to a process for manufacturing copolyether glycol which comprises recycle to the polymerization reaction step of at least a portion of the oligomeric cyclic ether which is co-produced with the copolyether glycol.</p> |
申请公布号 |
EP2419471(B1) |
申请公布日期 |
2014.09.24 |
申请号 |
EP20090843446 |
申请日期 |
2009.04.15 |
申请人 |
INVISTA TECHNOLOGIES S.À.R.L. |
发明人 |
SUN, QUN;KISER, GARY, L.;ORLANDI, ROBERT, D. |
分类号 |
C08G65/32;C08G65/00;C08G65/10;C08G65/20;C08G65/30 |
主分类号 |
C08G65/32 |
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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