Chlorofluorocarbon-free flexible polyurethane foams and method of making with blowing efficiency enhancers
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United States of America Patent
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Nov 24, 1992
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N/A
app pub date -
Jun 6, 1990
filing date -
Jun 6, 1990
priority date (Note) -
Expired
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Abstract
N,N'-di-sec-alkenyl-or-di-sec-alkyl-substituted methylene diphenyl diamines are effective curing agents for making polyurethane foams from MDI-based polyisocyanates. The diamines are especially advantageous since foams of lower density having lower hardness can be obtained without utilizing chlorofluorocarbous (CFC's) and without sacrificing tensile strength, tear strength, SAG or compression set values.
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