Chemically absorbed film comprising fluorocarbon chains

• US 5,451,459 A
• Filed: 07/28/1994
• Issued: 09/19/1995
• Est. Priority Date: 04/30/1991
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Ogawa, Kazufumi, Mino, Norihisa, Soga, Mamoru
• Primary Examiner(s): NAKARANI, DHIRAJLAL S
• Application Number:
  US08/281,681
• Time in Patent Office: 418 Days
• Field of Search: 428/333, 428/429, 428/447, 428/448, 428/450, 428/451, 428/688
• US Class Current: 428/333
• CPC Class Codes: B05D 1/185 applying monomolecular layers B05D1/204 takes precedence
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C08G 77/04 Polysiloxanes
• CPC Class Codes: C09D 4/00 Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
• CPC Class Codes: Y10T 428/261 In terms of molecular thickness or light wave length
• CPC Class Codes: Y10T 428/31612 As silicone, silane or siloxane
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane
• CPC Class Codes: Y10T 428/31667 Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product

Abstract

According to the invention, a fluorine-based or siloxane -based chemical adsorbed film containing a fluorocarbon compound can be formed on a given substrate surface in a laminated state and through chemical bonds (i.e., covalent bonds) with the substrate, it is possible to obtain a laminated film which has satisfactory adhesion to the substrate, is substantially pin-hole free and is very thin. Further, since the outermost layer may be substituted by fluorocarbon groups or hydroxyl groups, it is possible to obtain a film which has excellent water- and oil-repelling properties or hydrophilic and oil-repelling properties and can replace fluorine-based coating films, thus improving the performance of products requiring a coating having a water- and oil-repelling resistant property, weather-resistant property, wear-resistant property and so forth which are desirable in electric products, vehicles, industrial devices and so forth.

Claims

1. A chemically adsorbed laminated film comprising a monomolecular inner layer film having molecule chains comprising mainly fluorocarbon groups and Si atoms at opposing ends of the molecule chains, said monomolecular inner layer being fixed onto a substrate surface by covalent -Si- bonds, and a monomolecular outer layer film having molecule chains comprising mainly fluorocarbon groups, said monomolecular outer layer being fixed onto the monomolecular inner layer by -Si- bonds.

2. The chemically adsorbed laminated film according to claim 1 wherein the fluorocarbon chains of the outer layer contain fluorine groups at an outermost end.

3. The chemically adsorbed laminated film according to claim 1, wherein the covalent -Si- bonds are -SiO- bonds.

4. The chemically adsorbed laminated film according to claim 1, wherein the surface of the outer monomolecular layer comprises hydroxyl groups, said laminated chemically adsorbed film having hydrophilic and oil-repelling properties.

5. The chemically adsorbed laminated film according to claim 1, wherein the surface of the outer monomolecular layer has fluorocarbon groups at an outermost end, said laminated chemically adsorbed film having water- and oil-repelling properties.

6. The chemically adsorbed laminated film according to claim 1, wherein the substrate is made of a member selected from the group consisting of metals, ceramics, glass and plastics.