Polyurethane dispersions in an aqueous asphalt emulsion
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United States of America Patent
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Apr 27, 2010
Grant Date -
Mar 12, 2009
app pub date -
Sep 6, 2007
filing date -
Sep 6, 2007
priority date (Note) -
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Abstract
The invention relates to liquid compositions that include an aqueous asphalt mixture and polyurethane dispersion. The polyurethane dispersion includes a polyurethane that is based on an aliphatic polyol backbone based on polytetramethyl ethlene glycol and/or polycaprolactone. The aqueous asphalt mixture in the liquid composition generally constitutes a majority volume percent of the liquid composition. The polyurethane dispersion generally constitutes at least about 0.1 volume percent of said liquid composition.
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