Chemically adsorbed film and method of manufacturing the same

• US 5,372,888 A
• Filed: 02/05/1992
• Issued: 12/13/1994
• Est. Priority Date: 02/06/1991
• Status: Expired due to Fees

• 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): Epstein, Henry F.
• Application Number:
  US07/831,486
• Time in Patent Office: 1,042 Days
• Field of Search: 428/7, 428/422, 428/429, 428/463, 361/323, 252/573, 29/25.42
• US Class Current: 428/422
• CPC Class Codes: A61L 33/0088 by grafting of a monomer onto the substrate
• 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: B82Y 5/00 Nanobiotechnology or nanomedicine, e.g. protein engineering or drug delivery
• CPC Class Codes: C08G 77/24 halogen-containing groups
• CPC Class Codes: C08L 83/04 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 428/31544 Addition polymer is perhalogenated
• CPC Class Codes: Y10T 428/31612 As silicone, silane or siloxane
• CPC Class Codes: Y10T 428/31699 Ester, halide or nitrile of addition polymer

Abstract

Disclosed is an ornament with a thin film formed on the ornament surface. The thin film includes a fluorocarbon-based adsorbed monomolecular film, and the thin film is covalently bonded to the ornament. By contacting the ornament with the non-aqueous solution containing a chlorosilane group at one end and a fluorocarbon chain at the other end, a reaction occurs between hydroxyl groups at the ornament surface and the chlorosilyl groups of the material having a plurality of chlorosilyl groups. A monomolecular film which is covalently bonded to the ornament surface is thereby obtained. A thin, fluorine-containing, monomolecular film thus can be formed on the ornament such that it is chemically bonded to the ornament. The film is anti-contaminating, water- and oil-repelling, durable and does not spoil the intrinsic luster of the ornament.

Claims

1. A chemically adsorbed monomolecular film covalently bonded to a surface of an ornamental substrate, said film comprising a fluorocarbon straight chain group of the formula CF₃ --(CF₂)_m --R--SiX_p Cl_3-p, where m represents 0 or an integer, R represents an alkyl group, an alkylene group, an alkyne group or a substituted group containing a --Si-- group or an oxygen atom, X represents a hydrogen atom or an alkyl group or a substituted group containing a --Si-- group or an oxygen atom, and p represents 0, 1 or 2.

2. The chemically adsorbed film according to claim 1, wherein said chemically adsorbed monomolecular film is formed on said ornamental substrate surface via a siloxane-based monomolecular film.

3. The chemically adsorbed film according to claim 1, wherein said ornamental are substrates selected from the group consisting of a gem, pearl, watch, watch case, sapphire, ruby, emerald, garnet, cat'"'"'s eye, diamond, topaz, quartz, crystal, agate, glass, silver, copper. aluminum, titanium, tin, stainless steel, precious metal, metal alloys, pottery, porcelain, ceramics, glass, stone, wood, and plastic.