AQUEOUS DISPERSIONS OF POLYURETHANE AND NANOPARTICLES
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United States of America Patent
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Issued Date -
Apr 25, 2013
app pub date -
Oct 21, 2011
filing date -
Oct 21, 2011
priority date (Note) -
Abandoned
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Abstract
The present disclosure is directed to aqueous dispersions comprising polyurethane and nanoparticles, and processes for preparing the aqueous dispersions. The dispersions comprise aqueous polyurethane dispersions having nanoparticles covalently incorporated into the polymer matrix. The dispersions are prepared by reacting isocyanate groups present on the polyurethane chain ends with free amine groups on a hydroxy- or amino-functionalized nanoparticle to covalently attach the polyurethane and the nanoparticle through urethane or urea linkages, respectively.
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