Method for preparing polyether polyol and copolymer thereof
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United States of America Patent
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Nov 6, 2001
Grant Date -
N/A
app pub date -
Nov 23, 1999
filing date -
May 19, 1999
priority date (Note) -
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Abstract
The present invention is related to a method for preparing polyether polyol or copolymerized polyether polyol, which uses an acid catalyst consisting of heteropoly acidic salts and oxides and/or binders. It allows tetrahydrofuran and/or cyclic ether compounds to carry out the ring-opening polymerization or ring-opening copolymerization with/without telogen, and obtains polyether polyol or copolymerized polyether polyol. An acid catalyst is used in the present invention because of its low solubility in organic solvent, so its process is simpler and the catalyst is easy to recycle for repeated use. As well, its preparation process is highly advantageous.
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