Curable film-forming compositions comprising catalyst associated with a carrier and methods for coating a substrate
AssigneePPG Industries Ohio, Inc.
InventorsScott J. Moravek, Davina J. Schwartzmiller
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Abstract
Methods of coating a substrate are disclosed. The methods comprise applying shear force to a coating composition either before or during application of the coating composition to the substrate. The coating composition comprises a water-borne or solvent-borne film-forming resin and a catalyst associated with a carrier, wherein at least some of the catalyst can be released from the carrier upon application of the shear force. Also provided are coated articles prepared by the methods.
Claims20
A coated article prepared by applying a sprayable coating composition to at least a portion of a substrate, wherein the coating composition comprises:
- a) a curable waterborne or solventborne film-forming resin;
- and
- b) a catalyst coated on, hydrogen bonded with, contained within or encapsulated by a carrier, said carrier comprising gelatin, polyoxymethylene urea formaldehyde, melamine formaldehyde, or silica;
- wherein said applying is conducted to impart shear force to the carrier, which thereby releases the catalyst from the carrier, and upon application of the shear force, at least some of the catalyst is released from the carrier, and wherein the carrier is not formed from the film-forming resin (a).
A coated article prepared by spraying a coating composition onto at least a portion of the substrate, wherein the coating composition comprises:
- (a) a curable water-borne or solvent-borne film-forming resin;
- and
- (b) a catalyst contained within or encapsulated by a carrier, said carrier comprising gelatin, polyoxymethylene urea formaldehyde, melamine formaldehyde, or silica;
- wherein said spraying is conducted by an atomizer or spray gun that imparts shear force to the carrier and thereby releases the catalyst from the carrier, and upon application of the shear force, at least some of the catalyst is released from the carrier, and wherein the carrier is not formed from the film-forming resin (a).
Dependencies are inferred from the claim text.