Polyurethane or polyisocyanurate foams blown with hydrofluorocarbons and carbon atoms
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United States of America Patent
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May 13, 2003
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N/A
app pub date -
Apr 17, 2002
filing date -
Apr 17, 2002
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Abstract
Rigid polyurethane or polyisocyanurate foams are produced by reacting an organic polyisocyanate with an amine-based polyether polyol in the presence of a catalyst, a hydrogen-containing fluorocarbon, water and carbon dioxide.
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