Fluorochemical and lecithin additive for coatings
Coating compositions comprise a coating base, a lecithin additive and a fluorochemical wherein the coating base is an alkyd coating, urethane resin coating, unsaturated polymer coating, latex coating or water-dispersed coating. The combination of a lecithin additive and fluorochemical imparts, to a coating composition, significantly improved cleanability and/or oil repellency (as measured by higher contact angles) compared to the individual ingredients alone.
1 . A composition comprising a coating composition, a lecithin additive, and a fluorochemical.
2 . A composition according to claim 1 , wherein the fluorochemical is selected from the group consisting essentially of a perfluoroalkyl ester, fluorinated urethane, fluorinated acrylic copolymer, fluorinated methacrylic copolymer, fluorinated anionic surfactant, fluorinated sulfonamide, fluorinated diol, perfluoroalkylamine oxide, perfluoroalkylsulfonic acid or its neutralized compounds, fluoroalkyl phosphates, and combinations thereof.
3 . The composition according to claim 1 wherein the composition further comprises a titanium dioxide pigment.
4 . The composition according to claim 1 , wherein the coating composition is selected from the group consisting of an alkyd coating, urethane coating, unsaturated polyester coating, a latex coating and a water dispersible coating composition.
5 . The composition according to claim 1 , wherein the lecithin additive is selected from the group consisting essentially of an acylated lecithin, hydroxylated lecithin, hydrolyzed lecithin, and combinations thereof.
6 . The composition according to claim 5 , wherein the acylated lecithin additive is an acetylated lecithin additive.
7 . The composition of claim 1 after drying to form a dried coating.
8 . The composition of claim 7 , wherein the advancing hexadecane contact angle of said dried coating is at least about 50 degrees.
9 . The composition of claim 7 , wherein the advancing hexadecane contact angle of said dried coating is improved by at least about 20 degrees.
10 . The composition of claim 7 , wherein the coating provides improved cleanability by at least about 50%.
11 . The composition of claim 7 , wherein the coating provides improved cleanability by at least about 1 point on a 0 to 10 point scale.
12 . The composition of claim 1 after curing wherein curing is conducted by air oxidation, a free radical mechanism, and/or radiation.
13 . The composition of claim 1 , wherein the lecithin additive is present in a concentration of between about 0.1 and about 10.0% by weight of the composition.
14 . The composition of claim 1 , wherein the lecithin additive is present in a concentration of between about 0.2 and about 5.0% by weight of the composition.
15 . The composition of claim 7 , having a concentration of fluorine between about 5 micrograms per gram and about 10,000 micrograms per gram.
16 . The composition of claim 15 , wherein the concentration of fluorine is between about 50 micrograms per gram and about 5,000 micrograms per gram.
17 . A method of providing improved cleanability to a substrate comprising coating the substrate with a coating composition comprising a lecithin additive and a fluorochemical.
18 . A kit comprising a lecithin additive and a fluorochemical which provides improved cleanability to a coating composition after drying when added thereto.
19 . The composition according to claim 18 , wherein the lecithin additive is selected from the group consisting essentially of an acylated lecithin, hydroxylated lecithin, hydrolyzed lecithin, and combinations thereof.
20 . A composition according to claim 18 , wherein the fluorochemical is selected from the group consisting essentially of a perfluoroalkyl ester, fluorinated urethane, fluorinated acrylic copolymer, fluorinated or methacrylic copolymer, fluorinated anionic surfactant, fluorinated sulfonamide, and/or fluorinated diol, perfluoroalkylamine oxide, perfluoroalkylsulfonic acid or its neutralized compounds, fluoroalkyl phosphates, and combinations thereof.