Swellable coating compositions
AssigneeMobay Corporation
InventorsJames W. Rosthauser, Peter H. Markusch
Life of this patent
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Abstract
The present invention is directed to a coating composition produced by reacting an organic isocyanate with an active hydrogen containing organic material at an isocyanate group to active hydrogen ratio of from 1:1 to 2:1, said composition: (i) capable of swelling at least 300% by volume at a film thickness of 3 mils or less within 5 minutes after immersion in a hydrocarbon solvent, (ii) having a heteroatom content of from 1 to 12% by weight based on the total weight of the composition, and (iii) having a mean chain length between cross-linking sites of at least 4000.
Claims5
A coating composition produced by reacting an organic isocyanate with an active hydrogen containing organic material at an isocyanate group to active hydrogen ratio of from 1:1 to 2:1, said composition:
- (i) capable of swelling at least 300% by volume at a film thickness of 3 mils or less within 5 minutes after immersion in a hydrocarbon solvent,
- (ii) having a heteroatom content of from 1 to 12% by weight based on the total weight of the composition, and
- (iii) having a mean chain length between cross-linking sites of at least 4000.
Dependencies are inferred from the claim text.