Process for preparing rigid and flexible polyurethane foams
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United States of America Patent
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Nov 14, 2000
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N/A
app pub date -
Nov 4, 1997
filing date -
Nov 8, 1996
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Abstract
Process for preparing a rigid and a flexible polyurethane foam by reacting a polyisocyanate and two different polyols under foam forming conditions, the polyisocyanate being reacted with said polyols in the absence of compounds comprising primary, secondary or tertiary amines. Flexible foams are obtained which do not show a major glass transition temperature between -100.degree. C. and +25.degree. C.
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