Process of making lightweight, rigid polyurethane foam
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United States of America Patent
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Aug 12, 2003
Grant Date -
N/A
app pub date -
Mar 11, 2002
filing date -
Mar 11, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a process generating a polyurethane foam by forming a mixture including isocyanate and polyol reactants, catalyst, and blowing agent, which mixture reacts exothermically to yield a rigid polyurethane foam, there is included expandable polystyrene beads made of a polystyrene that has a softening point at or below the maximum temperature reached during the exothermic reaction.
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Cited Art Landscape
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