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US 7,598,315 B2Granted
Aqueous dispersions of nanoparticle/polyurethane composites
AssigneeLubrizol Advanced Materials, Inc.
InventorAlexander V. Lubnin
Life of this patent
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Abstract
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.
Claims16
A process for making an aqueous dispersion of nanoparticle/polyurethane composites, the process comprising:
- forming a mixture of nanoparticles and a continuous mass of a polyurethane prepolymer in the substantial absence of water, and
- dispersing the mixture in aqueous medium.
Dependencies are inferred from the claim text.