Reduced density opaque coatings and aerospace vehicles at least partially coated therewith
AssigneePPG Industries Ohio, Inc.
InventorsSiamanto Abrami, Razmik Boghossian
Life of this patent
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Abstract
Disclosed are reduced density coating compositions and articles, such as aerospace vehicles, at least partially coated with an opaque coating deposited from such compositions. The reduced density coating compositions include low density microspheres comprising a core and a solid opacifying coating covering a surface of the core.
Claims21
A coating composition comprising:
- (a) a binder;
- (b) an opacifying pigment, and
- (c) low density microspheres comprising a core and a solid opacifying coating directly covering the surface of the core, the surface of the core comprising aluminum silicate, calcium carbonate and/or calcium silicate.
A coating composition comprising:
- (a) a binder;
- (b) an opacifying pigment, and
- (c) low density microspheres comprising a core and a solid opacifying coating directly covering at least a portion of the surface of the core, the surface of the core comprising aluminum silicate, calcium carbonate and/or calcium silicate,
- wherein the solid opacifying coating covering at least a portion of the surface of the core comprises titanium dioxide.
A coating composition comprising:
- (a) a binder;
- (b) an opacifying pigment, and
- (c) low density microspheres comprising a core and a solid opacifying coating directly covering at least a portion of the surface of the core, the surface of the core comprising aluminum silicate, calcium carbonate and/or calcium silicate,
- wherein the solid opacifying coating covering at least a portion of the surface of the core covers from 70 to 100 percent of the entire surface area of the microsphere.
A coating composition comprising:
- (a) a binder;
- and
- (b) low density microspheres comprising a hollow core and a solid opacifying coating directly covering a surface of the hollow core, the surface of the hollow core consisting of alumina, silica, aluminum silicate, calcium carbonate and/or calcium silicate.
An aerospace vehicle comprising a surface at least partially coated with an opaque coating deposited from a coating composition comprising:
- (a) a binder, and
- (b) low density microspheres comprising a hollow core and a solid opacifying coating directly covering a surface of the hollow core, the surface of the hollow core consisting of silica, alumina, aluminum silicate, calcium carbonate and/or calcium silicate.
A method for reducing the density at a given film thickness of an opaque coating, without significantly impacting the opacity of the coating, comprising replacing a portion of an opacifying pigment in a coating composition from which the coating is deposited with low density microspheres comprising a hollow core and a solid opacifying coating covering a surface of the hollow core, the surface of the hollow core consisting of alumina, silica, aluminum silicate, calcium carbonate and/or calcium silicate.
Dependencies are inferred from the claim text.