Water and oil repelling film having surface irregularities and method of manufacturing the same
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazufumi Ogawa, Mamoru Soga
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Abstract
A water- and oil-repelling adsorbing film formed on a material having active hydrogen such as hydroxyl group, imino group and amino group at the surface. This film is a chemically adsorbed film having surface irregularities exceeding 10 nanometers. It is directly or indirectly covalently bonded to the material surface and includes a monomolecular film or a polymer film with the molecules thereof containing a fluorocarbon group and a --Si-- bond. The surface irregularities which exceed the molecular level are at least either those formed on the material surface itself, those due to particles formed on the substrate surface or those due to particles present in the chemically adsorbed film.
Claims11
A water and oil repelling film on a substrate surface comprising a chemically adsorbed film, the water and oil repelling film having an outer surface having irregularities from about 0.1 to about 50 microns in size, said chemically adsorbed film being bonded by covalent bonds to said substrate surface, and said chemically adsorbed film being a monomolecular or polymer film comprising a plurality of --CF.sub.3 groups and a plurality of siloxane groups wherein the --CF.sub.3 groups are at the outer surface of the chemically adsorbed film and wherein the water wetting angle of said chemically adsorbed film is at least about 130 degrees.
Dependencies are inferred from the claim text.