US3909424A
Expired / Lapsed
US
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Lubricant compositions
Assignee: Dow Silicones Corp
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Filing: 1974-06-24
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Granted: 1975-09-30
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Expires: 1994-06-24
Abstract
Abstract Lubricant films are formed on solid substrates by application of a composition containing solid lubricant particles carried in a dispersion of colloidal silica in an acidified alcohol-water solution of the partial condensate of methyltrisilanol.
Inventors
- 👤 Harold A Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:53
CPC Classifications
C; C10; C10M; C10M7/00; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/05; C10M2201/06; C10M2201/061; C10M2201/062; C10M2201/063; C10M2201/065; C10M2201/066; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/084; C10M2201/10; C10M2201/105; C10M2201/16; C10M2201/18; C10M2205/00; C10M2205/02; C10M2205/024; C10M2207/00; C10M2207/28; C10M2209/00; C10M2209/10; C10M2209/102; C10M2209/12; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2217/00; C10M2217/02; C10M2217/024; C10M2217/04; C10M2217/042; C10M2217/043; C10M2217/044; C10M2217/045; C10M2217/06; C10M2227/00; C10M2227/04; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10M2229/05; C10M2229/051; C10N; C10N2010/00; C10N2010/04; C10N2050/00; C10N2050/015; C10N2050/02; C10N2050/08; C10N2050/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
130 words
A LUBRICANT COMPOSITION COMPRISING A HOMOGENEOUS MIXTURE OF A. A PARTICULATE SOLID LUBRICANT AND B. A FILM-FORMING CARRIER CONSISTING ESSENTIALLY OF A DISPERSION OF COLLOIDAL SILICA IN A LOWER ALIPHATIC ALCOHOL-WATER SOLUTION OF THE PRTIAL CONDENSATE OF A SILANOL OF THE FORMULA RSI(OH)3 IN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS OF 1 TO 3 INCLUSIVE CARBON ATOMS THE VINYL RADICAL THE O83,3-TRIFLUOROPROPYL RADICAL THE GAMMA-GLYCIDOXYPROPYL RADICAL AND THE GAMMAMETHACRYLOXYPROPYL RADICAL AT LEAST 70 WEIGHT PERCENT OF THE SILANOL BEING CH3SI(OH)3 SAID CARRIER CONTAINING 10 TO 50 WEIGHT PERCENT SOLIDS CONSISTING ESSENTIALLY OF 1/ TO 75 WEIGHT PERCENT COLLOIDAL SILICA AND 25 TO 90 WEIGHT PERCENT OF THE PARTIAL CONDENSATE SAID CARRIED CONTAINING SUFFICIENT ACID TO PROVIDE A PH OF 3.0 TO 6.0 IN THE CARRIER.
Claim 2
Dependent Claim
130 words
A LUBRICANT COMPOSITION COMPRISING A HOMOGENEOUS MIXTURE OF A. A PARTICULATE SOLID LUBRICANT AND B. A FILM-FORMING CARRIER CONSISTING ESSENTIALLY OF A DISPERSION OF COLLOIDAL SILICA IN A LOWER ALIPHATIC ALCOHOL-WATER SOLUTION OF THE PRTIAL CONDENSATE OF A SILANOL OF THE FORMULA RSI(OH)3 IN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS OF 1 TO 3 INCLUSIVE CARBON ATOMS THE VINYL RADICAL THE O83,3-TRIFLUOROPROPYL RADICAL THE GAMMA-GLYCIDOXYPROPYL RADICAL AND THE GAMMAMETHACRYLOXYPROPYL RADICAL AT LEAST 70 WEIGHT PERCENT OF THE SILANOL BEING CH3SI(OH)3 SAID CARRIER CONTAINING 10 TO 50 WEIGHT PERCENT SOLIDS CONSISTING ESSENTIALLY OF 1/ TO 75 WEIGHT PERCENT COLLOIDAL SILICA AND 25 TO 90 WEIGHT PERCENT OF THE PARTIAL CONDENSATE SAID CARRIED CONTAINING SUFFICIENT ACID TO PROVIDE A PH OF 3.0 TO 6.0 IN THE CARRIER.
Claim 3
Dependent Claim
34 words
A lubricant composition in accordance with claim 1 in which the alcohol is present in an amount in the range of 20 to 75 weight percent based on the total weight of the cosolvent.
Claim 4
Dependent Claim
31 words
A lubricant composition in accordance with claim 2 in which the acid is a carboxylic acid selected from the group consisting of acetic acid, formic acid, propionic acid and maleic acid.
Claim 5
Dependent Claim
26 words
A lubricant composition in accordance with claim 3 in which the carrier contains from 0.1 to 1.5 weight percent of a buffered latent silanol condensation catalyst.
Claim 6
Dependent Claim
20 words
A lubricant composition in accordance with claim 4 wherein the catalyst is an alkali metal salt of a carboxylic acid.
Claim 7
Dependent Claim
14 words
A lubricant composition in accordance with claim 5 wherein the catalyst is sodium acetate.
Claim 8
Dependent Claim
35 words
A lubricant composition in accordance with claim 2 wherein the particulate solid lubricnat (a) is present in an amount in the range of 10 to 75 weight percent based on the total weight of composition.
Claim 9
Dependent Claim
15 words
A lubricant composition in accordance with claim 2 wherein the solid lubricant (a) is poly(tetrafluoroethylene).
Claim 10
Dependent Claim
15 words
A lubricant composition in accordance with claim 2 wherein the solid lubricant (a) is graphite.
Claim 11
Dependent Claim
15 words
A lubricant composition in accordance with claim 2 wherein the solid lubricant (a) is MoS2.
References Cited (Backward Citations)
US3467596A
Cited
US3516933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |