发明名称 |
Poly:tetra:hydro:furan soln. purificn. to neutralise acid catalyst - by treatment with strongly basic anion exchange resin |
摘要 |
<p>Purificn. of poly(tetrahydrofuran)(PTHF) solns. accruing in the acid-catalysed polymerisation of tetrahydrofuran (THF) involves neutralisation of the acid remaining in the organic phase with OH ions, using a strongly basic anion exchanger (I) as OH ion carrier. (I) is based on a polymeric resin, pref. polystyrene, with quat. alkylammonium gps. and is used in an amt. of 5-20 (pref. 7-10) wt. % w.r.t. THF. PTHF with 2 terminal OH gps. is used in the prodn. of polyester elastomers and elastic polyurethanes. The process is simple and effective.</p> |
申请公布号 |
DE2746911(A1) |
申请公布日期 |
1979.04.26 |
申请号 |
DE19772746911 |
申请日期 |
1977.10.19 |
申请人 |
CHEMISCHE WERKE HUELS AG |
发明人 |
STRATMANN,HELMUT,DIPL.-CHEM.DR. |
分类号 |
C08G65/20;C08G65/30;(IPC1-7):08G65/30;08G65/20 |
主分类号 |
C08G65/20 |
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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