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US 4,692,382 AGranted
Elastomeric coating compositions
AssigneePPG Industries, Inc.
InventorsRobert J. Schmitt, Leon A. Perez, Robert A. Montague, Marvin T. Tetenbaum, Ellor J. Van Buskirk
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Abstract
A coating composition has as its principal constituents (i) an isocyanate terminated urethane containing material; and (ii) a phosphatized polyepoxide essentially free of oxirane groups. The coating composition has excellent elongation and is particularly useful as a coating applied directly to metal. The coating composition is also useful as a primer in the preparation of multilayer coatings having good flexibility.
Claims26
A coating composition comprising:
- (i) an isocyanate terminated urethane containing material;
- and
- (ii) a phosphatized polyepoxide essentially free of oxirane groups.
A method of providing a substrate with a multilayer coating comprising:
- (a) applying a flexible primer coating composition to a substrate, said coating composition comprising (i) an isocyanate terminated urethane containing material;
- and (ii) a phosphatized polyepoxide essentially free of oxirane groups.
- (b) applying at least one pigmented coating composition to the coated substrate of (a);
- (c) at least partially curing the coated substrate of step (b);
- said multilayer coating having an elongation of at least 50 percent when cured.
2 more elements
Dependencies are inferred from the claim text.