Viscoelastic foam layer and composition
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United States of America Patent
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Mar 10, 2015
Issued Date -
N/A
app pub date -
Oct 19, 2004
filing date -
Oct 22, 2003
priority date (Note) -
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Abstract
A viscoelastic foam system is provided having an amine-based polyoxypropylene extended polyol to impart strength, recoverability and endurance to the foam, and an appropriately selected non-amine-based polyol to provide flexibility to the foam. The combination of amine-based propylene oxide extended polyol and non-amine-based polyol provides a viscoelastic semi-rigid foam with excellent impact and recovery properties, recovering to substantially 100% of its initial volume and shape following an impact, yet with sufficient rigidity and stiffness so that it is effective at absorbing multiple impacts. A method of making the above viscoelastic foam is also provided.
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