Prepolymer of stable viscosity terminated in isocyanate component of polyoxyalkylene polyol stable in storage polyoxyalkylene polyol stable in storage process to increase stability in storage polyurethane polymer and polyurethane elastomer of a moisture-cured component

摘要

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.