Claims
- 1. A hydrocarbon fuel soluble, solid lubricant for addition to two-cycle engine fuel and substantially spontaneous dispersion therein, to provide lubrication to a two-cycle engine using said fuel, said solid lubricant being shaped in the form of a pellet having a diameter of at least 1 mm. up to 4 cm.; said solid lubricant comprising (1) from 25 to 75 weight percent of a saturated fatty acid having 12 to 22 carbon atoms; (2) from 5 to 40 weight percent of at least one polymer selected from the group consisting of polyisobutylene having a molecular weight of at least about 800, and polymerized, unsaturated fatty acids having an average of at least about 24 carbon atoms per polymerized molecule; and (3) from 10 to 50 weight percent of a polybasic ester of a polyol molecule and 2 to 4 fatty acid molecules, each fatty acid molecule having 4 to 22 carbon atoms.
- 2. The solid lubricant of claim 1 which also contains from 10 to 25 weight percent of a detergent additive for engines.
- 3. The solid lubricant of claim 2 in which ingredient (1) has an even number of carbon atoms numbering at least 14.
- 4. The solid lubricant of claim 2 in which ingredient (2) consists essentially of a dimer of linoleic acid.
- 5. The solid lubricant of claim 2 in which ingredient (3) is a tribasic acid ester of trimethylol propane.
- 6. The solid lubricant of claim 2 in which from 40 to 55 weight percent of ingredient (1) is present.
- 7. The solid lubricant of claim 2 in which from 7 to 25 weight percent of ingredient (2) is present.
- 8. The solid lubricant of claim 2 in which from 20 to 40 weight percent of ingredient (3) is present.
- 9. A hydrocarbon fuel soluble lubricant pellet which comprises (1) from 25 to 75 weight percent of a saturated fatty acid having 12 to 22 carbon atoms, (2) from 5 to 40 weight percent of polyisobutylene having a molecular weight of at least about 800; and (3) from 10 to 50 weight percent of a polybasic ester of a polyol molecule and 2 to 4 fatty acid molecules, each fatty acid molecule having an average of 4 to 22 carbon atoms.
- 10. The lubricant of claim 9 which also contains from 10 to 25 weight percent of a detergent additive for engines.
- 11. The lubricant of claim 9 in which ingredient (1) has an even number of carbon atoms numbering at least 14.
- 12. The lubricant of claim 9 in which from 40 to 55 weight percent of ingredient (1) is present.
- 13. The lubricant of claim 9 in which from 7 to 25 weight percent of ingredient (2) is present.
- 14. The lubricant of claim 9 in which from 20 to 40 weight percent of ingredient (3) is present.
- 15. The lubricant of claim 9 in which ingredient (2) consists essentially of a dimer of linoleic acid.
- 16. The lubricant of claim 9 in which ingredient (3) is a tribasic acid ester of trimethylol propane.
- 17. The lubricant of claim 9 in which said polyol molecule is monomeric.
- 18. A two-cycle engine fuel composition which comprises a mixture of gasoline and the hydrocarbon fuel-soluble lubricant of claim 7 in a concentration of 1 part by weight of said lubricant per 100 to 300 parts by weight of said gasoline.
- 19. A lubricating process for two-cycle engines which comprises the steps of:
- providing a solid lubricant pellet having a diameter of at least 1 mm. up to 4 cm. and comprising a hydrocarbon fuel-soluble lubricant;
- introducing two-cycle engine fuel to a fuel tank of a two-cycle engine; and
- introducing said solid pellet to the fuel tank of the two-cycle engine in a concentration of one part by weight of said solid lubricant to 100-300 parts by weight of said two-cycle engine fuel,
- whereby said solid pellet disperses in said two-cycle engine fuel substantially spontaneously to form a lubricant mixture with the fuel; said solid pellet comprising (1) from 25 to 75 weight percent of a saturated fatty acid having 12 to 22 carbon atoms; (2) from 5 to 40 weight percent of at least one polymer selected from the group consisting of polyisobutylene having a molecular weight of at least about 800, and polymerized, unsaturated fatty acids having at least one average of at least about 24 carbon atoms per polymerized molecule; and (3) from 10 to 50 weight percent of a polybasic ester of a polyol molecule and 2 to 4 fatty acid molecules, each fatty acid molecule having 4 to 22 carbon atoms.
- 20. The process of claim 19 in which said solid lubricant further contains from 10 to 25 weight percent of a detergent additive for engines.
Parent Case Info
This is a continuation of application Ser. No. 07/881,122, filed May 11, 1992, abandoned which, in turn, is a continuation of application Serial No. 07/719,329, filed Jun. 20, 1991, Abandoned.
US Referenced Citations (14)
Non-Patent Literature Citations (2)
Entry |
Unichema International, Priolube 3999--Synthetic Base Fluid For Outboard--2--Stroke Engine Lubricants. Feb 1987. |
Unichema International, High Performance Ester Base 2--Stroke Oils. |
Continuations (2)
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Number |
Date |
Country |
Parent |
881122 |
May 1992 |
|
Parent |
719329 |
Jun 1991 |
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