Dispersion polyols for hypersoft polyurethane foam
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United States of America Patent
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May 16, 2000
Grant Date -
N/A
app pub date -
Jul 13, 1998
filing date -
Jul 13, 1998
priority date (Note) -
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Abstract
Dispersion polyols which are liquid--liquid dispersions containing a first polyol having a substantially polyoxypropylene internal block having an equivalent weight in excess of about 700 Da and a high oxyethylene-content external block, and a second polyol which is a substantially polyoxyethylene polyol containing minimally 50 weight percent oxyethylene moieties. The dispersion polyols are stable and exhibit broad processing latitude when preparing hypersoft polyurethane foams. The dispersion polyols are advantageously prepared in situ, preferably in the presence of a double metal cyanide oxyalkylation catalyst.
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