Polycarbonate based elastomeric coating compositions
AssigneePPG Industries, Inc.
InventorsRobert J. Schmitt, Leon A. Perez, Robert A. Montague, Marvin T. Tetenbaum
Life of this patent
Estimating the term…
Abstract
A coating composition is composed of a material or mixture of materials adapted to provide a source of: (i) carbonate moieties; (ii) isocyanate groups; and (iii) 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.
Claims29
A coating composition comprising a material or mixture of materials adapted to provide a source of:
- (i) carbonate moieties;
- (ii) isocyanate groups;
- and
- (iii) 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 a material or mixture of materials adapted to provide a source of (i) carbonate moieties, (ii) isocyanate groups;
- and (iii) 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.
Dependencies are inferred from the claim text.