Patent ID: 6045962
Filing Date: 2000-04-04
Classification: G03G

Abstract:
A method for forming a low surface energy coating comprising:i) forming a coating of at least 1 coating material (B) having a water contact angle .theta..sub.B on a substrate having a water contact angle .theta..sub.S and thereafterii) forming a coating of coating material (A) having a water contact angle .theta..sub.A on top of coating material (B);wherein .theta..sub.S is less than .theta..sub.B, .theta..sub.A is greater than .theta..sub.B ; and wherein coating material (A) comprises finely divided silica and a resin of general formula R.sup.1 SiO.sub.3/2, wherein each R.sup.1 is selected from the group consisting of fluorohydrocarbon groups of 3 to 12 carbon atoms; saturated hydrocarbon groups of 1 to 18 carbon atoms, with the proviso that the saturated hydrocarbon groups may further comprise oxygen atoms; and aromatic hydrocarbon groups of 6 to 18 carbon atoms; and with the proviso that not less than 1 mol % and not more than 80 mol % of all the R.sup.1 groups are fluorohydrocarbon groups.