Method of providing a substrate with a flexible multilayer coating
AssigneePPG Industries, Inc.
InventorsDennis W. Carson, Robert J. Schmitt, Carl A. Seneker, Thomas A. Van Kuren, David R. Wallace
Life of this patent
Estimating the term…
Abstract
A coating composition contains an organic polyol, a polyepoxide, a polyisocyanate crosslinking agent, and a phenolic resin. The composition is flexible, having an elongation of at least 10 percent when cured. This coating composition is particularly suitable as a primer in preparing substrates with a multilayer coating having good flexibility.
Claims27
A method of providing a substrate with a multilayer coating comprising:
- a. applying a flexible primer coating composition to a substrate, said primer coating composition comprising an organic polyol, a polyepoxide, a blocked polyisocyanate curing agent, and a phenolic resin and having an elongation of at least 10 percent when cured;
- b. applying a pigmented coating composition to the coated substrate of step (a), said pigmented coating composition comprising a fluorocarbon polymer;
- c. applying a clear coating composition to the coated substrate of step (b), said clear coating composition comprising a fluorocarbon polymer;
- and
- d. at least partially curing the coated substrate of step (c);
- said multilayer coating having an elongation of at least 10 percent cured.
A method of providing a substrate with a multilayer coating comprising:
- a. applying a flexible primer coating composition to a substrate, said primer coating composition being a two package coating composition comprising an organic polyol, polyepoxide, a free polyisocyanate crosslinking agent and a phenolic resin, with the proviso that the organic polyol is present in one package and the polyisocyanate crosslinking agent is present in a second package, said coating composition having an elongation of at least 10 percent when cured;
- b. applying a pigmented coating composition to the coated substrate of step (a), said pigmented coating composition comprising a fluorocarbon polymer;
- c. applying a clear coating composition to the coated substrate of step (b), said clear coating composition comprising a fluorocarbon polymer;
- and
- d. at least partially curing the coated substrate of step (c);
- said multilayer coating having an elongation of at least 10 percent when cured.
A method of providing a substrate with a multilayer coating comprising:
- (a) applying a flexible primer coating composition to a substrate, said primer coating composition being a two package coating composition comprising:
- a first package comprising an organic polyol, a polyepoxide and a phenolic resin and a second package comprising a free polyisocyanate crosslinking agent, said coating composition having an elongation of at least 10 percent when cured;
- (b) applying a pigmented coating composition to the coated substrate of step (a), said pigmented coating composition comprising a fluorocarbon polymer;
- (c) applying a clear coating composition to the coated substrate of step (b), said clear coating composition comprising a fluorocarbon polymer;
- and
- (d) at least partially curing the coated substrate of step (c);
- said multilayer coating composition having an elongation of at least 10 percent when cured.
Dependencies are inferred from the claim text.