Foamed isocyanate-based polymer having improved hardness properties and process for production thereof
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United States of America Patent
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Issued Date -
Dec 25, 2003
app pub date -
Jan 28, 2003
filing date -
Jan 28, 2002
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Abandoned
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Abstract
In one of its aspects, the present invention relates to a foamed isocyanate-based polymer derived from a reaction mixture comprising toluene diisocyanate, wherein the foam has a compression force deformation of at least about 50 kPa at 30% deflection when measured pursuant to ASTM 3574 and a density of less than about 45 kg/m.sup.3. In another of its aspects, the present invention relates to a process for producing a foamed isocyanate-based polymer comprising the steps of: contacting an isocyanate comprising toluene diisocyanate, an active hydrogen-containing compound, a dendritic macromolecule and a blowing agent to form a reaction mixture; and expanding the reaction mixture to produce the foamed isocyanate-based polymer; wherein at least a 15% by weight of the dendritic macromolecule may be mixed with a polyether polyol having an OH number less than about 40 mg KOH/g to form a stable liquid at 23.degree. C.
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