Method of manufacturing a water- and oil-repelling film having surface irregularities
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazufumi Ogawa, Mamoru Soga
Life of this patent
Estimating the term…
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.
Claims14
A method of manufacturing a water- and oil-repelling adsorbed film comprising:
- making a substrate surface irregular wherein the irregularities have a diameter of 0.01-50 .mu.m;
- and
- contacting said irregular surface with a non-aqueous solution containing an active surface material comprising molecules having a fluorocarbon group and a chlorosilane group or having a fluorocarbon group and an alkoxysilane group.
A method of manufacturing a water- and oil-repelling adsorbed film comprising:
- preparing a substrate having active hydrogen groups at the surface and contacting said substrate with a non-aqueous solution containing a material with the molecules thereof having a plurality of chlorosilyl groups to coat said material onto the surface of said substrate through a reaction between active hydrogen groups at said substrate surface and the chlorosilyl groups of said material with the molecules thereof having a plurality of chlorosilyl groups;
- coating with a non-aqueous solution containing a mixture of a surface active material with the molecules thereof containing a fluorocarbon group and a chlorosilane group and fine particles having a hydrophilic surface;
- contacting with a mixture of a material with the molecules thereof containing a fluorocarbon group and an alkoxysilane group and fine particles having hydrophilic surface;
- and
- thermally baking said coating together with the substrate.
A method of manufacturing a water- and oil-repelling adsorbing film comprising:
- a step of preparing a substrate having active hydrogen groups at the surface and contacting the surface of said substrate with a non-aqueous solution containing a material with the molecules thereof containing a plurality of chlorosilyl groups to adsorb said material to the substrate surface through a reaction between active hydrogen groups on the substrate surface and chlorosilyl groups of said material with the molecules thereof having a plurality of chlorosilyl groups;
- forming a thin film or a chemically adsorbed monomolecular film of said material with the molecules thereof containing a plurality of chlorosilyl groups on said substrate with or without removal of non-reacted material remaining on the substrate by washing with a non-aqueous organic solution;
- adsorbing on to the film a non-aqueous solution containing a mixture of a surface active material with the molecules thereof having a fluorocarbon group and a silyl group and fine particles having hydrophilic surface;
- and
- thermally baking said coating together with the substrate.
Dependencies are inferred from the claim text.