US4608282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoropolymer surface lubricant and coating
Assignee: FTI Inc A CORP OF
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Filing: 1985-04-11
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Granted: 1986-08-26
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Expires: 2005-04-11
Abstract
Abstract The invention is a composition for coating surfaces with a thin film containing fluoropolymer particles, a method for producing this composition, as well as a method for applying it to a surface. More particularly, the composition includes a carrier medium, such as a synthetic base stock, which has particles of a fluoropolymer, such as ground and sintered polytetrafluoroethylene, well dispersed within it. A solvent, such as 1,1,1-trichloroethane, is blended with the fluoropolymer containing carrier medium, most preferably in either a 32 to 1 ratio or an 8 to 1 ratio. The result is a low viscosity dispersion of the carrier medium, which itself has a dispersion of the fluoropolymer particles. When the composition is applied to a surface, the lowered viscosity aids in obtaining a thinner film of the grease and also enhances the penetration of the fluoropolymer particles into the surface. Advantageously, the solvent is allowed to evaporate from the surface, thus leaving an even thinner film of the grease. Also, the evaporation of the solvent returns the grease to a higher viscosity which is better retained on the surface. Preferably, the grease also contains a phosphate ester, such as tricresyl phosphate, which is thought to aid in dispersing the fluoropolymer particles in the grease, and in attaching the fluoropolymer particles to the surface.
Inventors
- 👤 Harry V. Runge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:47
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/08; C; C10; C10M; C10M111/00; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/023; C10M2213/04; C10M2213/043; C10M2213/06; C10M2213/0606; C10M2213/062; C10M2213/0623; C10M2223/00; C10M2223/003; C10M2223/02; C10M2223/023; C10M2223/04; C10M2223/0405; C10M2223/041; C10M2223/042; C10M2223/049; C10M2223/0495; C10M2223/06; C10M2223/0603; C10M2223/08; C10M2223/083; C10M2223/10; C10M2223/103; C10N; C10N2050/00; C10N2050/015; C10N2050/02
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
53 words
A composition for coating a surface with a thin film containing particles of a fluoropolymer comprising: a dispersion comprising a carrier medium and fluoropolymer particles, said carrier medium comprising a grease; and a solvent means for diluting said dispersion, said solvent being adapted to evaporate after application of the composition to the surface.
Claim 2
Dependent Claim
53 words
A composition for coating a surface with a thin film containing particles of a fluoropolymer comprising: a dispersion comprising a carrier medium and fluoropolymer particles, said carrier medium comprising a grease; and a solvent means for diluting said dispersion, said solvent being adapted to evaporate after application of the composition to the surface.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein the fluoropolymer particles comprise polytetrafluorethylene.
Claim 4
Dependent Claim
12 words
The composition of claim 2 wherein the particles are ground and sintered.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein the carrier medium comprises a phosphate ester.
Claim 6
Dependent Claim
21 words
The composition of claim 4 wherein the phosphate ester is selected from the group consisting of tricresyl phosphate and triaryl phosphate.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein the solvent means is nonflammable.
Claim 8
Dependent Claim
11 words
The composition of claim 1 wherein the solvent means comprises 1,1,1-trichloroethane.
Claim 9
Dependent Claim
24 words
The composition of claim 1 wherein the proportion of solvent means to carrier medium is between about 8 to 1 and 32 to 1.
Claim 10
Dependent Claim
19 words
The composition of claim 1 wherein the proportion of solvent means to carrier medium is about 8 to 1.
Claim 11
Dependent Claim
19 words
The composition of claim 1 wherein the proportion of solvent means to carrier medium is about 32 to 1.
Claim 12
Dependent Claim
76 words
A composition for coating a surface with a thin film containing particles of a fluoropolymer comprising: a dispersion comprising a carrier medium and a quantity of polytetrafluoroethylene particles, said medium comprising a mixture of a grease and a phosphate ester selected from the group consisting of tricresyl phosphate and triaryl phosphate; and a solvent means comprising 1,1,1-trichloroethane for diluting said dispersion, said solvent means being adapted to evaporate after application of the composition to the surface.
Claim 13
Dependent Claim
76 words
A composition for coating a surface with a thin film containing particles of a fluoropolymer comprising: a dispersion comprising a carrier medium and a quantity of polytetrafluoroethylene particles, said medium comprising a mixture of a grease and a phosphate ester selected from the group consisting of tricresyl phosphate and triaryl phosphate; and a solvent means comprising 1,1,1-trichloroethane for diluting said dispersion, said solvent means being adapted to evaporate after application of the composition to the surface.
Claim 14
Dependent Claim
24 words
The composition of claim 11 wherein the proportion of solvent means to carrier medium is between about 8 to 1 and 32 to 1.
Claim 15
Dependent Claim
19 words
The composition of claim 11 wherein the proportion of solvent means to carrier medium is about 8 to 1.
Claim 16
Dependent Claim
19 words
The composition of claim 11 wherein the proportion of solvent means to carrier medium is about 32 to 1.
Claim 17
Dependent Claim
18 words
The composition of claim 11 wherein the proportion of grease to phosphate ester is about 2 to 1.
Claim 18
Dependent Claim
14 words
The composition of claim 11 wherein the grease comprises a blend of polyol esters.
Claim 19
Dependent Claim
18 words
The composition of claim 11 wherein the carrier medium further comprises a minor amount of an anticorrosion additive.
Claim 20
Dependent Claim
13 words
The composition of claim 16 wherein the anticorrosion additive comprises dodecin succinic anhydride.
Claim 21
Independent Claim
80 words
A method of producing a composition for coating a surface with a thin film containing particles of a fluoropolymer comprising: providing a a dispersion comprising particles of a fluoropolymer and a carrier medium, which carrier medium comprises grease; providing a solvent means which is capable of diluting said dispersion and is adapted to evaporate after application of the composition to the surface; and mixing the solvent means with said dispersion so that said dispersion is well dispersed in said solvent.
Claim 22
Independent Claim
80 words
A method of producing a composition for coating a surface with a thin film containing particles of a fluoropolymer comprising: providing a a dispersion comprising particles of a fluoropolymer and a carrier medium, which carrier medium comprises grease; providing a solvent means which is capable of diluting said dispersion and is adapted to evaporate after application of the composition to the surface; and mixing the solvent means with said dispersion so that said dispersion is well dispersed in said solvent.
Claim 23
Dependent Claim
18 words
The method of claim 19 wherein said particles of a fluoropolymer remain substantially dispersed in the carrier medium.
Claim 24
Dependent Claim
13 words
The method of claim 19 wherein the particles comprise ground and sintered polytetrafluoroethylene.
Claim 25
Dependent Claim
29 words
The method of claim 19 wherein the carrier medium comprises a mixture of grease and a phosphate ester selected from the group consisting of tricresyl phosphate and triaryl phosphate.
Claim 26
Independent Claim
101 words
A method of producing a composition for coating a surface with a thin film containing particles of a fluoropolymer comprising: providing a dispersion comprising particles of a polytetrafluoroethylene and a carrier medium, the medium comprising a mixture of grease and a phosphate ester selected from the group consisting of tricresyl and triaryl phosphate; providing a solvent means comprising 1,1,1-trichloroethane which means is capable of diluting the dispersion and is adapted to evaporate after application of the composition to the surface; and mixing the solvent means with the dispersion so that said dispersion is in turn well dispersed in said solvent means.
Claim 27
Independent Claim
101 words
A method of producing a composition for coating a surface with a thin film containing particles of a fluoropolymer comprising: providing a dispersion comprising particles of a polytetrafluoroethylene and a carrier medium, the medium comprising a mixture of grease and a phosphate ester selected from the group consisting of tricresyl and triaryl phosphate; providing a solvent means comprising 1,1,1-trichloroethane which means is capable of diluting the dispersion and is adapted to evaporate after application of the composition to the surface; and mixing the solvent means with the dispersion so that said dispersion is in turn well dispersed in said solvent means.
Claim 28
Independent Claim
107 words
A method of coating a surface with a thin film containing particles of a fluoropolymer comprising the steps of: providing a dispersion comprising particles of a fluoropolymer and a carrier medium, which carrier medium comprises grease; providing a solvent capable of diluting the dispersion and which is adapted to evaporate after application of the composition to the surface; mixing the dispersion with the solvent to form a mixture such that said dispersion is well dispersed in said solvent; and applying the mixture to a surface after which substantially all of the solvent evaporates thereby leaving a thin film containing the particles of a fluoropolymer on the surface.
Claim 29
Independent Claim
107 words
A method of coating a surface with a thin film containing particles of a fluoropolymer comprising the steps of: providing a dispersion comprising particles of a fluoropolymer and a carrier medium, which carrier medium comprises grease; providing a solvent capable of diluting the dispersion and which is adapted to evaporate after application of the composition to the surface; mixing the dispersion with the solvent to form a mixture such that said dispersion is well dispersed in said solvent; and applying the mixture to a surface after which substantially all of the solvent evaporates thereby leaving a thin film containing the particles of a fluoropolymer on the surface.
Claim 30
Dependent Claim
23 words
The method of claim 24 wherein the surface is buffed after application of the mixture to increase surface penetration of the fluoropolymer particles.
Claim 31
Dependent Claim
14 words
The method of claim 24 wherein the fluoropolymer particles comprise ground and sintered polytetrafluoroethylene.
Claim 32
Dependent Claim
29 words
The method of claim 24 wherein the carrier medium comprises a mixture of grease and a phosphate ester selected from the group consisting of tricresyl phosphate and triaryl phosphate.
Claim 33
Dependent Claim
15 words
The method of claim 24 wherein the mixture is applied to the surface by spraying.
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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) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |