Compositions and coatings formed thereof with reduced ice adherence and accumulation
A durable coating which reduces ice adhesion and minimizes ice accumulation includes a polymeric binder and a film forming lubricant. The polymeric binder is selected from a fluoropolymer or silicone polymer having one or more reactive groups. The film forming lubricant is a lubricous fluoropolymer or silicone polymer. Methods of applying a durable coating are also disclosed.
1. A coating composition comprising:
a polymeric binder consisting of a first polymer, wherein the first polymer is a fluoroethylene-alkyl vinyl ether (“FEVE”) copolymer, and wherein the polymeric binder is dispersed in water;
a film forming lubricant comprising a second polymer, the second polymer comprising a fluoropolymer or silicone polymer, wherein the first polymer and second polymer are different; and
a non-film forming lubricant; and
wherein the coating composition is substantially free of organic solvents.
2. The coating composition of claim 1 , wherein the FEVE copolymer of the polymeric binder comprises about 20% to about 80%, by dry weight, of the coating composition and the film forming lubricant comprises about 10% to about 30%, by dry weight, of the coating composition.
3. The coating composition of claim 2 , further comprising from about 5% to about 45%, by dry weight, of a crosslinking agent.
4. The coating composition of claim 3 , wherein the crosslinking agent comprises one or more of isocyanate, methoxy silane, epoxy silane, and a reactive silicone.
5. The coating composition of claim 1 , wherein the non-film forming lubricant comprises one or more of dimethicone, a silicon emulsion, and polydimethylsiloxane oil.
6. The coating composition of claim 1 , further comprising one or more of a coalescent agent, a defoamer, an adhesion promoter, a viscosity modifier, a wetting agent, a film leveling agent, and a dispersion agent.
7. The coating composition of claim 1 , further comprising one or more of a heat stabilizer, a light stabilizer, a UV stabilizer, a filler, a pigment, and a colorant.
8. The coating composition of claim 1 is substantially free of a filler.
9. The coating composition of claim 1 , further comprising:
about 5% to about 45% of a crosslinking agent comprising one or more of isocyanate, methoxy silane, epoxy silane, and a reactive silicone; and
one or more of a coalescent agent, a defoamer, a film leveling agent, and a UV stabilizer.
10. A coating formed from the coating composition of claim 1 .
11. The coating of claim 10 exhibits a water contact angle of about 80° to about 140°.
12. The coating of claim 10 , wherein ice adheres with about 50 kPa or less of force.
13. The coating of claim 10 , wherein ice adheres with about 100 kPa or less of force after heat aging at about 150° C. for 30 days.
14. The coating of claim 10 passes a 1 inch Mandrel Bend Test.
15. The coating of claim 10 passes a 2 inch Mandrel Bend Test after heat aging at 150° C. for 30 days.
16. An overhead conductor comprising the coating of claim 10 .
17. The overhead conductor of claim 16 , further comprising one or more conductive wires.
18. The overhead conductor of claim 16 , wherein ice adheres with about 50 kPa or less of force.