US3871837A
Expired / Lapsed
US
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Method for lubricating 2-stroke engines and rotary engines
Assignee: IFP Energies nouvelles
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Filing: 1973-06-01
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Granted: 1975-03-18
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Expires: 1993-06-01
Abstract
Abstract Method for lubrication two-stroke engines or rotary engines fed with gasoline, comprising introducing thereinto a lubrication composition which consists of a base lubricant and conventional additives and having a viscosity at 98.9*C of at least 6 centistrokes, wherein said base lubricant comprises from 10 to 100% by weight of at least one polyalkyleneglycol derivative selected from the group consisting of ethers, simple esters, complex esters, polyesters and esters of ethers, of polyalkyleneglycol having the formula HO -R-O-n H in which each radical R is a C2-C5 alkylene radical, preferably ethylene or propylene, and n an integer from 2 to 50. In order to further improve the properties of these lubricating compositions, certain organic compounds, especially C10 18 aliphatic monocarboxylic acids, their lower alkyl esters, C10 18 aliphatic monoalcohols and C10 18 aliphatic primary monoamines, as well as C36 aliphatic dicarboxylic acids, C54 aliphatic tricarboxylic acids, and their lower alkyl esters, may be added to the base lubricant in proportions from 0.1 to 40 % by weight with respect to said base lubricant.
Inventors
- 👤 Pierre Bedague
- 👤 Pierre Marchand
- 👤 Guy Parc
- 👤 Fernand Roux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:37
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/198; C10M; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10L1/1985; C10L1/1986; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/023; C10M2207/08; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/30; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2209/108; C10M2209/109; C10M2209/11; C10M2209/111; C10M2209/112; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/24; C10M2215/26; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/25; C10N2040/255; C10N2040/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
61 words
A METHOD FOR LUBRICATING A TWO-STROKE ENGINE FED WITH GASOLINE, COMPRISING INTRODUCING INTO THE ENGINE A LUBRICATING COMPOSITION HAVING A VISCOSITY AT 98.9*C OF AT LEAST 6 CENTISTOKES, THE BASE LUBRICANT OF WHICH CONTAINS FROM 10 TO 100% BY WEIGHT OF AT LEAST ONE POLYALKYLENEGLYCOL DERIVATIVE BEING BIS OCTADECANOATE OR BIS DODECANOATE OF A C2-C5 POLYOXYALKYLENE GLYCOL CONTAINING 2-50 OXYALKYLENE UNITS.
Claim 2
Independent Claim
61 words
A METHOD FOR LUBRICATING A TWO-STROKE ENGINE FED WITH GASOLINE, COMPRISING INTRODUCING INTO THE ENGINE A LUBRICATING COMPOSITION HAVING A VISCOSITY AT 98.9*C OF AT LEAST 6 CENTISTOKES, THE BASE LUBRICANT OF WHICH CONTAINS FROM 10 TO 100% BY WEIGHT OF AT LEAST ONE POLYALKYLENEGLYCOL DERIVATIVE BEING BIS OCTADECANOATE OR BIS DODECANOATE OF A C2-C5 POLYOXYALKYLENE GLYCOL CONTAINING 2-50 OXYALKYLENE UNITS.
Claim 3
Dependent Claim
25 words
A method according to claim 1, in which the base lubricant contains from 20 to 100% by weight of said at least one polyalkyleneglycol derivative.
Claim 4
Dependent Claim
52 words
A method according to claim 1, for lubricating a two-stroke gasoline engine, in which the lubricating composition is introduced into the engine in a proportion corresponding to an amount of base lubricant of from 0.1 to 2% by weight with respect to the fuel amount required for the operation of said engine.
Claim 5
Dependent Claim
59 words
A method according to claim 3, in which the base lubricant contains a minor proportion of said polyalkyleneglycol derivative and the lubricating composition is introduced into the engine in a proportion corresponding to an amount of said base lubricant of from 0.5 to 2% by weight with respect to the fuel amount required for the operation of the engine.
Claim 6
Dependent Claim
58 words
A method according to claim 3, in which the base lubricant contains a major proportion of said polyalkyleneglycol derivative and the lubricating composition introduced into the engine in a proportion corresponding to an amount of said base lubricant of from 0.1 to 1% by weight with respect to the fuel amount required for the operation of the engine.
Claim 7
Dependent Claim
78 words
A method according to claim 1 futher comprising adding to the base lubricant from 0.1 to 40% by weight of at least one organic compound selected from monocarboxylic acids containing an aliphatic chain of 10-18 carbon atoms, their lower alkyl esters; monoalcohols and primary monoamines containing an aliphatic chain of 10-18 carbon atoms; dicarboxylic acids containing an aliphatic chain of 36 atoms; and tricarboxylic acids containing an aliphatic chain of 54 carbon latoms and their lower alkyl esters.
Claim 8
Dependent Claim
19 words
A method according to claim 6, wherein said organic compound amounts to 5-25% by weight of the base lubricant.
Claim 9
Dependent Claim
22 words
A method according to claim 6, wherein said organic compound is selected from dodecanoic acid, its Lower alkyl esters, dodecanol and dodecylamine.
Claim 10
Dependent Claim
19 words
A method according to claim 6, wherein the base lubricant consists essentially of said at least one polyalkyleneglycol derivative.
Claim 11
Dependent Claim
19 words
A method according to claim 7, wherein the base lubricant consists essentially of said at least one polyalkyleneglycol derivative.
Claim 12
Dependent Claim
52 words
A method according to claim 6, for lubricating a two-stroke gasoline engine, in which the lubricating composition is introduced into the engine in a proportion corresponding to an amount of base lubricant of from 0.1 to 2% by weight with respect to the fuel amount required for the operation of said engine.
Claim 13
Dependent Claim
79 words
In a method of lublicating a two-cycle or rotary engine wherein the combustion mixture fed to the combustion chamber contains a mixture of gasoline and a lubricating compositions, the improvement wherein the weight percent proportion of the lubricating composition to the gasoline is 0.1 -1% and said lubricating composition contains a base lubricant having a major porition of at at least one polyalkyleneglycol deravitive being bis octadecanoate or bis dodecanoate of a C2-C5 polyoxyalkylene glycol containing 2-50 oxyalkylene units.
Claim 14
Dependent Claim
79 words
In a method of lublicating a two-cycle or rotary engine wherein the combustion mixture fed to the combustion chamber contains a mixture of gasoline and a lubricating compositions, the improvement wherein the weight percent proportion of the lubricating composition to the gasoline is 0.1 -1% and said lubricating composition contains a base lubricant having a major porition of at at least one polyalkyleneglycol deravitive being bis octadecanoate or bis dodecanoate of a C2-C5 polyoxyalkylene glycol containing 2-50 oxyalkylene units.
Claim 15
Dependent Claim
77 words
A fuel-lubricant mixture comprising gasoline and a lubricating composition comprising a lubricating amount of a base lubricant having a viscosity at 98.9*C of at least 6 centistokes, in which the proportion of the lubricating composition corresponds to an amount of base lubricant of from 50 ppm to 2% by weight with respect to said gasoline, said base lubricant containing from 10 to 100% bis octadecanoate or bis dodecanoate of a C2-C5 polyoxyalkylene glycol containing 2-50 oxyalkylene units.
Claim 16
Dependent Claim
77 words
A fuel-lubricant mixture comprising gasoline and a lubricating composition comprising a lubricating amount of a base lubricant having a viscosity at 98.9*C of at least 6 centistokes, in which the proportion of the lubricating composition corresponds to an amount of base lubricant of from 50 ppm to 2% by weight with respect to said gasoline, said base lubricant containing from 10 to 100% bis octadecanoate or bis dodecanoate of a C2-C5 polyoxyalkylene glycol containing 2-50 oxyalkylene units.
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |