US Patent:
20130101540, Apr 25, 2013
Inventors:
Serkan Unal - Pittsburgh PA, US
Yuliya Berezkin - Pittsburgh PA, US
Peter D. Schmitt - Beaver PA, US
Karl W. Haider - Wexford PA, US
Robert N. Hunt - Steubenville OH, US
Assignee:
Bayer MaterialScience LLC - Pittsburgh PA
International Classification:
C08L 75/14
A61Q 19/00
A61K 8/87
A61Q 15/00
B82Y 40/00
B82Y 30/00
US Classification:
424 65, 524591, 424 7802, 977902, 977926, 977897
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.