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US 5,496,642 AGranted
Low VOC, fluorocompound-containing one-component and two-component coating compositions for slippery coatings
AssigneeOlin Corporation
InventorsMichael M. Martinez, Adam G. Malofsky, Kiran B. Chandalia, Fred A. Stuber
Life of this patent
Estimating the term…
Abstract
This invention relates to one-component and two-component heat-curable or moisture-curable coating compositions, and processes for their use in providing a slippery coating on a substrate utilizing a polyisocyanate-based low VOC coating composition, employing a fluoro-containing active hydrogen-containing compound, and which is suitably rapidly hardened under the influence of heat or moisture.
Claims11
A process for providing a slippery coating on a substrate which comprises:
- (a) contacting said substrate with a low volatile-organics, one-component, heat curable coating composition to form a coating on said substrate, said coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds and consisting essentially of at least one blocked polyisocyanate, a fluorine-containing monoahl alone or in combination with a fluorine-free active hydrogen-containing compound, a solvent in an amount of between 0% and 45% by weight based upon the amount of said polyisocyanate in said composition, and a trimerization catalyst, said composition being essentially free of any mono- and di-isocyanate monomers, and
- (b) heating said coating to a curing temperature of between 120.degree. F. and 350.degree. F. for a curing time of between about ten minutes and about six hours in order to cure said coating by trimerizing at least some isocyanate groups of said polyisocyanate to provide a heat-cured coating on said substrate,
- said heat-cured coating being characterized by a contact angle of greater than 63 degrees.
A process for providing a slippery coating on a substrate which comprises:
- (a) contacting said substrate with a low volatile-organics, two-component, heat curable coating composition to form a coating on said substrate, said coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds and consisting essentially of at least one polyisocyanate, a fluorine-containing monoahl alone or in combination with a fluorine-free active hydrogen-containing compound, a solvent in an amount of between 0% and 45% by weight based upon the amount of said polyisocyanate in said composition, and a trimerization catalyst, said composition being essentially free of any mono- and di-isocyanate monomers, and
- (b) heating said coating to a curing temperature of between 120.degree. F. and 350.degree. F. for a curing time of between about ten minutes and about six hours in order to cure said coating by trimerizing at least some isocyanate groups of said polyisocyanate to provide a heat-cured coating on said substrate,
- said heat-cured coating being characterized by a contact angle of greater than 63 degrees.
A process for providing a slippery coating on a substrate which comprises:
- (a) contacting said substrate with a low volatile organics-containing, one-component, moisture curable coating composition to form a coating on said substrate, said coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds and consisting essentially of at least one polyisocyanate prepolymer which is the reaction product of a polyisocyanate with a fluorine-containing, monoahl alone or in combination with a fluorine-free active hydrogen-containing compound, a solvent in an amount of between 0% and 45% by weight based upon the amount of said composition, and a tertiary amine catalyst, said composition being essentially free of any mono- and di-isocyanate monomers, and said composition being moisture curable upon exposure to atmospheric or added moisture, and
- (b) exposing said coating to atmospheric or added moisture to provide a moisture-cured coating on said substrate,
- said moisture-cured coating being characterized by a contact angle for deionized water on the coating of greater than 63 degrees.
A process for providing a slippery coating on a substrate which comprises:
- (a) contacting said substrate with a low volatile organics-containing, two-component, moisture curable coating composition to form a coating on said substrate, said coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds and consisting essentially of at least one polyisocyanate, a fluorine-containing, monoahl alone or in combination with a fluorine-free active hydrogen-containing compound, a solvent in an amount of between 0% and 45% by weight based upon the amount of said polyisocyanate in said composition, and a tertiary amine catalyst, said composition being essentially free of any volatile mono- and di-isocyanates, and said composition being moisture curable upon exposure to atmospheric or added moisture, and
- (b) exposing said coating to atmospheric or added moisture to provide a moisture-cured coating on said substrate,
- said moisture-cured coating being characterized by a contact angle of greater than 63 degrees.
Dependencies are inferred from the claim text.