High density polyurethane and polyisocyanurate construction boards and composite boards
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United States of America Patent
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Jun 4, 2013
Grant Date -
Feb 11, 2010
app pub date -
Jan 30, 2008
filing date -
Jan 30, 2007
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Abstract
A construction board comprising a cellular body including at least one planar surface, where the cellular body includes a polyurethane or polyisocyanurate cellular structure, where the cellular structure has a density greater than about 2.5 pounds per cubic foot, an ISO index of at least 270, and where the cellular body includes at least 5.0% by weight flame retardant based on the weight of the cellular body.
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