Method for reducing oligomeric cyclic ether content of a polymerizate
AssigneeE. I. Du Pont de Nemours and Company
InventorIvan M. Robinson
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Abstract
The oligomeric cyclic ether content of a tetrahydrofuran/alkylene oxide polymerizate is significantly reduced by bringing the polymerizate into contact with an acid-activated sodium or calcium montmorillonite clay.
Claims6
A method for reducing the oligomeric cyclic ether content of a substantially monomer-free THF/alkylene oxide polymerizate, the method comprising bringing the polymerizate into contact, at a temperature of 70.degree.-150.degree. C., with 1-50%, by weight of the polymerizate, of an acid-activated sodium or calcium montmorillonite clay, for a time sufficient to significantly reduce the oligomeric cyclic ether content of the polymerizate.
Dependencies are inferred from the claim text.