Lignocellulosic composites
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United States of America Patent
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Jan 16, 2007
Issued Date -
N/A
app pub date -
Apr 9, 2002
filing date -
May 14, 2000
priority date (Note) -
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Abstract
Lignocellulosic-based woodfiber-plastic composite products containing a pesticidal amount of calcium borate is resistant to attack by wood destroying fungi and insects. The preferred calcium borates are the calcium polytriborates having a CaO:B.sub.2O.sub.3 molar ratio of about 2:3 and calcium hexaborates, having a CaO:B.sub.2O.sub.3 ratio of 1:3. Composites can be produced by combining the calcium borate with particles of the lignocellulosic material and the thermoplastic resin binder, and heating and extruding the resultant mixture through a die to form the composite product.
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Cited Art Landscape
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