Hydrocarbon blown rigid polyurethane foams having improved flammability performance
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United States of America Patent
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Nov 20, 2001
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app pub date -
May 13, 1999
filing date -
May 21, 1998
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Abstract
Rigid polyurethane or urethane modified polyisocyanurate foams having improved flame resistance are disclosed. The foams are prepared from a composition containing (a) an isocyanate, (b) an isocyanate reactive composition, (c) a hydrocarbon/water blowing agent and (d) a phosphorus material.
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