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US 12,246,985 B2Granted
Scratch-resistant coating for glass ceramic cooktop
AssigneeWhirlpool Corporation
InventorsMargherita Basso, Luigi De Nardo, Agnese D'Agostino
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Abstract
Scratch-resistant coatings, especially for cooktops, and substrates or products having said scratch-resistant coatings and methods for the production thereof are described herein. More particularly, scratch-resistant coatings obtained via sol-gel approach and coated substrates having thereon a hard material layer comprising metal nitride(s) and/or metal oxynitride complexes are described, as well as the manufacturing thereof.
Claims5
A sol coating for a cooking appliance comprising:
- one or more metal precursors solubilized in a solvent with an overall concentration of 0.05 to 0.5 M, the one or more metal precursors comprises at least aluminum chloride;
- and
- a nitrogen carrier,
- wherein the one or more metal precursors and nitrogen carrier are taken under a continuous nitrogen flux at room temperature and wherein a molar ratio between the nitrogen carrier and the one or more metal precursors is between 0.5 to 5, and upon deposition of a layer of the sol coating having a thickness of 1-8 micrometers via screen-printing, or 100 to 200 nm via dip-coating or spray-coating, onto a cooking surface and curing, the sol coating has a scratch resistance of 10 to 16 N as based on pencil hardness.
1 more element
Dependencies are inferred from the claim text.