C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/131
C08G 18/28 (2006.01) C08G 18/62 (2006.01) C08G 18/69 (2006.01) C08G 18/75 (2006.01) C08G 18/77 (2006.01) C09D 175/14 (2006.01)
Patent
CA 1273145
SWELLABLE COATING COMPOSITIONS ABSTRACT OF THE DISCLOSURE 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.
522252
Markusch Peter H.
Rosthauser James W.
Mobay Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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