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US 6,075,072 AGranted
Latent coating for metal surface repair
Assignee3M Innovative Properties Company
InventorsCurtis R. Guilbert, David G. Enos, Charles E. Boyer, III
Life of this patent
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Abstract
A corrosion protective coating composition, applied over a metal surface, contains frangible microcapsules which rupture and release fluid upon impact or other stress likely to damage the coating. The fluid, from the microcapsules, contains a film forming component to cover the damaged area of the coating and a corrosion inhibitor for the metal surface.
Claims19
A corrosion protective coating composition, comprising:
- a) a film forming binder, and
- b) a plurality of microcapsules, mixed with said binder, said microcapsules containing a latent repair fluid comprising a film forming component and a corrosion inhibitor.
A corrosion protective coating composition, comprising:
- (a) a film forming binder;
- (b) a first plurality of microcapsules containing a corrosion inhibitor, and
- (c) a second plurality of microcapsules containing a film forming component, said first and said second plurality of microcapsules being substantially uniformly distributed throughout said binder.
A corrosion protective layer, comprising:
- (a) a continuous resin phase, and
- (b) a plurality of frangible microcapsules, substantially uniformly dispersed in said resin phase, said microcapsules containing a fluid composition to effect repair of said layer when damaged.
Dependencies are inferred from the claim text.