Compositions and methods for resin-based wood glues
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United States of America Patent
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Dec 4, 2012
Grant Date -
Dec 24, 2009
app pub date -
Sep 14, 2007
filing date -
Sep 18, 2006
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Expired
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Abstract
A method for extending resin-based wood glues, particularly condensation polymer resin-based glues, comprises the steps of (i) providing an aqueous extender composition comprising 20% to 50% by weight of alkali metal silicate and 1% to 25% by weight of polyhydric alcohol, preferably a sugar such as sucrose, (ii) providing a solution comprising a resin and (iii) blending the aqueous extender and the solution together to form a glue. The extended glues are suitable for preparing water resistant processed wooden panels such as plywood or chipboard with reduced need for resin. The extended glues do not set excessively rapidly, allowing time for the processing of the wood composites.
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