Viscosity stable isocyanate-terminated prepolymers and polyoxyalkylene polyether polyols having improved storage stability
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United States of America Patent
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Sep 22, 1998
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Aug 10, 1995
filing date -
Aug 10, 1995
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Abstract
Polyoxyalkylene polyols containing double metal cyanide complexes or residues thereof as are produced during the preparation of polyoxyalkylene polyols by the double metal cyanide complex catalyzed oxyalkylation of a suitably functional hydric initiator are stable without catalyst removal. Isocyanate-terminated prepolymers prepared from such polyols are surprisingly viscosity-stable relative to similar prepolymers prepared from polyols not containing double metal cyanide complexes or residues thereof.
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