Heat releasable composite coatings and related methods
AssigneePPG Industries Ohio, Inc.
InventorsRichard J. Foukes, Ken W. Niederst, Kevin P. Gallagher, Jackie L. Kulfan
Life of this patent
Estimating the term…
Abstract
Disclosed are heat releasable multi-component composite coatings. These coatings include an under coating and an over coating deposited over at least a portion of the under coating. The under coating is deposited from a coating composition that includes a film-forming resin and thermally expandable capsules having an average diameter of 5 to 25 μm. The over coating layer has a 60 degree gloss of no more than 60 gloss units.
Claims20
A heat releasable multi-component composite coating comprising:
- (1) an under coating deposited from a coating composition comprising:
- (a) a film-forming resin;
- and
- (b) thermally expandable capsules having an average initial particle size of 5 to 25 microns, and
- (2) an over coating deposited over at least a portion of the under coating, wherein the over coating has a 60 degree gloss of no more than 60 gloss units,
- wherein the thermally expandable capsules are in an unexpanded state, and
- wherein the under coating is selected from the group consisting of a primer coating, an electrodeposition coating, and a pigmented basecoat.
A method of forming a multi-component composite coating comprising:
- (a) depositing a coating composition onto at least a portion of a substrate to form an under coating, wherein the coating composition comprises:
- (i) a film-forming resin, and
- (ii) thermally expandable capsules having an average initial particle size of 5 to 25 μm;
- (b) allowing the coating composition to coalesce to form a substantially continuous under coating on the substrate;
- (c) depositing a coating composition comprising a film-forming resin onto at least a portion of the substrate and over at least a portion of the under coating;
- (d) allowing the coating composition to coalesce to form a substantially continuous over coating on the substrate and over at least a portion of the under coating;
- and
- (e) curing at least one of the under coating and the over coating by heating the under coating layer and/or the over coating to a predetermined bake temperature of the under coating and/or the over coating for a predetermined period of time,
- wherein the thermally expandable capsules have an initial expansion temperature that is higher than the predetermined bake temperature,
- wherein the under coating is selected from the group consisting of a primer coating, an electrodeposition coating, and a pigmented basecoat, and
- wherein the over coating in the resultant multi-component composite coating has a 60 degree gloss of no more than 60 gloss units.
A consumer electronics device at least partially coated with a multi-component composite coating comprising:
- (1) an under coating deposited from a coating composition comprising:
- (a) a film-forming resin;
- and
- (b) thermally expandable capsules having an average initial particle size of 6 to 25 μm;
- and
- (2) an over coating deposited over at least a portion of the under coating, wherein the thermally expandable capsules are in an unexpanded state,
- wherein the under coating is selected from the group consisting of a primer coating, an electrodeposition coating, and a pigmented basecoat.
Dependencies are inferred from the claim text.