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US 4,123,401 AGranted
Finishes having improved scratch resistance prepared from compositions of fluoropolymer, mica particles or metal flake, a polymer of monoethylenically unsaturated monomers and a liquid carrier
AssigneeE. I. Du Pont de Nemours and Company
InventorsJacques M. L. Berghmans, Eva M. Vary
Life of this patent
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Abstract
Compositions containing (a) fluoropolymer, (b) mica particles, mica particles coated with pigment, or metal flake, (c) a polymer of ethylenically unsaturated monomers, and (d) a liquid carrier Are useful for coating metal, especially cookware, to give lubricious surfaces.
Claims15
A coating composition consisting essentially of
- (a) about 80-99.8%, by weight of the total of (a) and (b), of a particulate polymer polymerized or copolymerized from monomers selected from one or more monoethylenically unsaturated hydrocarbon monomers and hydrocarbon ether monomers, said monomers being completely substituted with fluorine atoms or a combination of fluorine atoms and chlorine atoms;
- (b) about 0.2-20%, by weight of the total of (a) and (b), of mica particles, mica particles coated with pigment, or metal flake;
- the total of (a) and (b) equaling 100%;
- (c) about 2-300%, by weight of (a), of one or more polymers of monoethylenically unsaturated monomers which depolymerize and whose depolymerization products vaporize in the temperature range of about 150.degree. C below the fusion temperature of (a) to about the decomposition temperature of (a);
- and
- (d) a liquid carrier,
- said coating composition being suitable for forming finishes having improved scratch resistance.
4 more elements
A method for improving the scratch resistance of a finish derived from a coating composition containing
- (a) a particulate polymer polymerized or copolymerized from monomers selected from one or more monoethylenically unsaturated hydrocarbon monomers and hydrocarbon ether monomers, said monomers being completely substituted with fluorine atoms or a combination of fluorine atoms and chlorine atoms;
- (b) one or more polymers of monoethylenically unsaturated monomers which depolymerize and whose depolymerization products vaporize in the temperature range of about 150.degree. C below the fusion temperature of (a) to about the decomposition temperature of (a);
- and
- (c) a liquid carrier,
- the method comprising adding to the composition, before it is applied, mica, mica coated with a pigment, or metal flake, in the amount of 0.2-20%, by weight of the total of fluoropolymer and mica, coated mica, or metal flake.
2 more elements
Dependencies are inferred from the claim text.