Viscoelastic polyurethane foams
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United States of America Patent
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May 21, 2002
Grant Date -
N/A
app pub date -
Jan 31, 2000
filing date -
Jan 31, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
Viscoelastic foams and a process for making them are disclosed. The foams are produced with a unique isocyanate-reactive mixture that includes a low equivalent weight polyol and from about 15 to about 70 wt. % of a polyester or polyoxyalkylene monol having a number average equivalent weight greater than about 1000. The monol is the key to formulating excellent viscoelastic foams over a broad range of processing conditions and isocyanate indices. A 'reactive' monol gives TDI-based viscoelastic foams with improved 'hand feel' and reduced levels of residual toluenediamines.
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