Aqueous dispersions of nanoparticle/polyurethane composites

Details Aqueous dispersions of nanoparticle/polyurethane composites Aqueous dispersions of nanoparticle/polyurethane composites

C - Chemistry, Metallurgy

08

G

C08G 18/08 (2006.01) C08G 18/12 (2006.01) C08G 18/66 (2006.01) C08K 3/22 (2006.01) C09D 175/06 (2006.01)

Patent

CA 2595399

An aqueous dispersion of nanoparticle/polyurethane composites is made by forming a mixture of nanoparticles and a continuous mass of a polyurethane prepolymer in the substantial absence of water and dispersing the mixture so made in aqueous medium. Alternatively, a polyurethane prepolymer or a mixture of nanoparticles and a continuous mass of a polyurethane prepolymer is dispersed into an aqueous dispersion of nanoparticles.

L'invention concerne une dispersion aqueuse de composites de nanoparticules/polyuréthane préparée par formation d'un mélange de nanoparticules et d'une masse continue d'un prépolymère de polyuréthane sensiblement en l'absence d'eau, et par dispersion du mélange ainsi formé dans un milieu aqueux. Selon une autre variante, un prépolymère de polyuréthane ou un mélange de nanoparticules et d'une masse continue d'un prépolymère de polyuréthane est dispersé dans une dispersion aqueuse de nanoparticules.

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