US3619249A
Expired / Lapsed
US
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A method for producing a fluorocarbon coating on metals and ceramics and the product thereof
Assignee: McDonnell Douglas Corp
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Filing: 1968-08-05
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Granted: 1971-11-09
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Expires: 1988-08-05
Abstract
Abstract Fluorocarbon coated metals and ceramics and method therefor. The metal or ceramic substrate is treated with a polar organic material to effect chemisorption of a monomolecular layer. A viscous saturated hydrocarbon coating, e.g., of petrolatum, is applied over the chemisorbed layer and is fluorinated to convert the hydrocarbon to the corresponding fluorocarbon. Such fluorocarbon coated metals and ceramics are useful for antisticking, anticorrosion and antifriction applications.
Inventors
- 👤 William A Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:19
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/18; B05D1/185; B05D5/00; B05D5/08; B05D5/083; B82; B82Y; B82Y30/00; B82Y40/00; C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/48; C04B41/4838; C04B41/4842; C04B41/80; C04B41/81; C04B41/82; C04B41/83; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
36 words
A method as defined in claim 1, wherein said fluorination with gaseous fluorine is carried out for a time sufficient to effect in excess of 85 percent conversion of said hydrocarbon layer to the corresponding fluorocarbon.
Claim 2
Dependent Claim
13 words
A method as defined in claim 1 wherein said substrate is a metal.
Claim 3
Dependent Claim
27 words
A method as defined in claim 1, wherein said chemisorption is effected from a solution of said fatty acid in a nonpolar solvent for said fatty acid.
Claim 4
Dependent Claim
34 words
A method as defined in claim 4, wherein said solution is a 1 percent solution by weight, said nonpolar solvent is volatile at ambient temperature, and said time for chemisorption is about 1 hour.
Claim 5
Dependent Claim
43 words
A method as defined in claim 1 wherein said saturated hydrocarbon is one which is semisolid to solid at ambient temperature and is applied to said monomolecular layer of polar organic material as a solution in a volatile nonpolar solvent for said hydrocarbon.
Claim 6
Dependent Claim
24 words
A method as deFined in claim 1 wherein said hydrocarbon layer has a thickness in the range of about 1 to about 5 microns.
Claim 7
Dependent Claim
34 words
A method as defined in claim 1, wherein said fluorine gas is applied to said hydrocarbon layer at a pressure in the range of about 30 p.s.i.g. to about 70 p.s.i.g. at ambient temperature.
Claim 8
Dependent Claim
95 words
A method as defined in claim 1 wherein said substrate is a metal, and said saturated hydrocarbon is semisolid to solid at ambient temperature, and wherein said chemisorption is effected from a solution of said fatty acid in a volatile nonpolar solvent for said fatty acid, said saturated hydrocarbon in the form of a thin, uniform layer is applied from a solution in a volatile nonpolar solvent for said hydrocarbon, said fluorine is applied to said wax layer at a pressure in the range of about 30 p.s.i.g. to about 70 p.s.i.g. at ambient temperature.
Claim 9
Dependent Claim
13 words
A method as defined in claim 9, wherein said saturated hydrocarbon is petrolatum.
Claim 10
Dependent Claim
91 words
A fluorocarbon coated ceramic or metal comprising a metal or ceramic substrate having a chemically bonded, adherent, integral layer comprised of a monomolecular layer of a saturated fatty acid of the formula CnH2n 1COOH wherein n is about 4 to about 26, chemisorbed on said substrate, said monomolecular layer having a chemically bonded, integral, thin, continuous overcoating of a fluorinated high molecular weight saturated hydrocarbon derived from a semisolid to solid hydrocarbon wax at ambient temperature having an average of about 17 to about 50 carbon atoms and complex mixtures thereof.
Claim 11
Dependent Claim
27 words
A fluorocarbon coated metal as defined in claim 11, wherein said fluorinated high molecular weight saturated hydrocarbon overcoating thickness ranging from about 1 to about 5 microns.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |