Claims
- 1. A substrate having an essentially tack-free adherent coating thereon which comprises a moisture curable polymer composition comprising:a) a polydiolefin polymer containing olefinic unsaturation in either the main polymer backbone or in pendent side chains; or a loop polymer having a polymeric backbone including a plurality of olefinic groups which have been converted to closed loops by reaction with difunctional organic compounds reactive with the olefinic groups, the olefinic groups from which the loops are formed being either present within the backbone and/or pendent from the backbone, with the proviso that when said polydiolefin polymer is used, said composition additionally comprises polysiloxane terminated with hydrolyzable groups; and b) a silicon cross-linking compound containing at least one easily hydrolysed substituent and at least one hydride substituent, which has been exposed to moisture to cross link said composition.
- 2. A substrate of claim 1 wherein the silicon cross linking compound is of formula: wherein X is a hydrolysable group and groups Y, which may be the same or different, are substituted or unsubstituted alkyl, substituted or unsubstituted aryl or a hydrolysable group.
- 3. A substrate of claim 2 wherein the hydrolysable group is chloro, alkoxy or acyloxy.
- 4. A substrate of claim 1 wherein said composition is curable at a temperature of −20° C. (0° F.) to 40° C. (100° F.).
- 5. A substrate of claim 1 wherein said composition is curable at room temperature.
- 6. A substrate according to claim 1 wherein the substrate is a ship hull.
- 7. A substrate of claim 1 wherein said polymer has a molecular weight up to 100,000.
- 8. A substrate of claim 1 wherein the polydiolefin is polybutadiene.
- 9. A method comprising:applying to a substrate a moisture curable polymer coating composition comprising: a polydiolefin polymer containing olefinic unsaturation in either the main polymer backbone or in pendent side chains; or a loop polymer having a polymeric backbone and a plurality of olefinic groups which have been converted to closed loops by reaction with difunctional organic compounds reactive with said olefinic groups, said olefinic groups from which the loops are formed being present within the backbone and/or pendent from the polymeric backbone, with the proviso that when said polydiolefin polymer is used, said composition additionally comprises polysiloxane terminated with hydrolyzable groups; and a silicon cross-linking compound containing at least one easily hydrolysed substituent and at least one hydride substituent; and curing the coating to cross-link the polymers by exposure of the coated substrate to atmospheric moisture to form an essentially tack-free coating.
- 10. The method of claim 9 wherein said substrate is a ship hull.
Parent Case Info
This patent application is a Divisional of prior U.S. patent application Ser. No. 09/777,067 filed Mar. 26, 2001, now U.S. Pat. No. 6,482,891 B2, which is a Divisional of U.S. patent application Ser. No. 09/363,915 filed on Jul. 28, 1999, now U.S. Pat. No. 6,251,993.
Government Interests
The work embodied in this patent was carried out under Contracts N00014-91-C-0007 and N00014-99-C-0049 (Office of Naval Research), giving the Government rights to a royalty-free license.
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