Poly(oxypropylene/oxyethylene) random polyols useful in preparin

Details Poly(oxypropylene/oxyethylene) random polyols useful in preparin Poly(oxypropylene/oxyethylene) random polyols useful in preparin

1996-10-21

1997-07-15

Foelak, Morton

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

521174, 568619, 568624, C07C 4311, C07C 4318

Patent

active

056485590

ABSTRACT:
High resilience polyurethane foams exhibiting little or no shrinkage may be prepared from low unsaturation double metal cyanide catalyzed polyoxyalkylene polyols in amounts greater than 20 weight percent of the total polyol component, when low unsaturation poly(oxypropylene/oxyethylene) random polyols having less than 35 weight percent of an all polyoxypropylene block catalyzed by double metal cyanide catalysts and one or more external random polyoxypropylene/polyoxyethylene blocks each containing 2 weight percent or more oxyethylene moieties, and an unsaturation of less than 0.02 meq/g are employed.

REFERENCES:
patent: 5144093 (1992-09-01), Reisch et al.
patent: 5235114 (1993-08-01), Reisch et al.
patent: 5357038 (1994-10-01), Reisch et al.
patent: 5391722 (1995-02-01), Chandalia et al.

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