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US 11,299,640 B2Granted
Polyurethane-silica composite-based coating composition, polyurethane-silica composite film, and method of preparing the same
AssigneesHyundai Motor Company, Kia Motors Corporation, Unist (Ulsan National Institute of Science and Technology)
InventorsHo-Tak Jeon, Choon-Soo Lee, Minsoo Kim, Hyunhyub Ko
Life of this patent
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Abstract
Disclosed is a coating composition which includes: polyurethane; and amphiphilic silica nanoparticles having an amine functional group and a fluorine functional group in their structure. Further provided are a polyurethane-silica composite film including the coating composition and a method of preparing the same.
Claims14
A method for preparing a polyurethane-silica composite film, comprising the steps of:
- (a) preparing polystyrene particles;
- (b) preparing silica-polystyrene particles by admixing the polystyrene particles with silica nanoparticles;
- (c) preparing amphiphilic silica nanoparticles by subjecting the silica-polystyrene particles to a first surface treatment, removing the polystyrene particles, and then subjecting the remaining silica nanoparticles to a second surface treatment,
- (d) preparing a coating composition by admixing the amphiphilic silica nanoparticles with polyurethane;
- and
- (e) applying the coating composition to a surface of a substrate to form a coating layer, and curing the coating layer.
3 more elements
Dependencies are inferred from the claim text.