GB2081299A - Two-stroke Fuel-lubricant Composition - Google Patents

Two-stroke Fuel-lubricant Composition Download PDF

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Publication number
GB2081299A
GB2081299A GB8024773A GB8024773A GB2081299A GB 2081299 A GB2081299 A GB 2081299A GB 8024773 A GB8024773 A GB 8024773A GB 8024773 A GB8024773 A GB 8024773A GB 2081299 A GB2081299 A GB 2081299A
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composition
mass
fuel
component
total
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GB2081299B (en
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ExxonMobil Technology and Engineering Co
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Exxon Research and Engineering Co
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Priority to GB8024773A priority Critical patent/GB2081299B/en
Priority to FR8114626A priority patent/FR2510597B1/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L10/00—Use of additives to fuels or fires for particular purposes
    • C10L10/08—Use of additives to fuels or fires for particular purposes for improving lubricity; for reducing wear
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/143—Organic compounds mixtures of organic macromolecular compounds with organic non-macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/16—Hydrocarbons
    • C10L1/1616—Hydrocarbons fractions, e.g. lubricants, solvents, naphta, bitumen, tars, terpentine
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/18—Organic compounds containing oxygen
    • C10L1/19—Esters ester radical containing compounds; ester ethers; carbonic acid esters
    • C10L1/1905—Esters ester radical containing compounds; ester ethers; carbonic acid esters of di- or polycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/18—Organic compounds containing oxygen
    • C10L1/192—Macromolecular compounds
    • C10L1/198—Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds homo- or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon to carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid
    • C10L1/1985—Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds homo- or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon to carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid polyethers, e.g. di- polygylcols and derivatives; ethers - esters
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/026—Butene
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/06—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/084—Acrylate; Methacrylate
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/107—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines
    • C10N2040/26—Two-strokes or two-cycle engines

Abstract

In a two-stroke fuel-lubricant composition the fuel component is a mixture of gasoline and a C1 to C6 alkanol in proportions from 99:1 to 65:35, (the alkanol can contain small amounts of water; technical ethanol being preferred) and the lubricant components comprises specified amounts of (a) conventional two- stroke mineral oil (b) a polyoxy- alkylene glycol of viscosity 5 to 30 cst at 100 DEG C and (c) a di-C8 to C12 alkyl ester of a dicarboxylic acid. Preferred components (b) and (c) are respectively a 2000 mol.wt. polyoxyethylene-polyoxy-propylene glycol and dioctyl adipate or diisononyl phthalate. One or more conventional VI improver, detergent, anti-corrosion, anti-foaming, anti- wear and pour depressant additives can also be present in specified amounts. The fuel to lubricant volume ratio is from 90:10 to 99:1, with the lubricant calculated as including the additives, when present.

Description

SPECIFICATION Two-stroke Fuel Lubricant Composition The present invention relates to a fuel-lubricant composition for a two-stroke engine.
A fuel-lubricant composition for a two-stroke engine (which compositions will also be referred to in the description hereafter as a 2-stroke mix) conventionally comprises 90 to 98 vol. % gasoline; 10 to 2 vol % of a 1:1 blend of mineral oil and conventional additives. Clearly, if it was possible to reduce the volume of gasoline present, without materially affecting performance, a major saving in fossil fuel energy would be achieved. Lower alkanols, especially C1 to C3 alkanols are known as gasoline additives for various purposes. However, the amounts added are very small since, among other reasons, miscibility in the system is severely limited. Moreover, lower alkanols must be anhydrous in order to avoid miscibility problems.
It is an object of the present invention to provide a fuel-lubricant composition for a two-stroke engine in which the fuel component is a gasoline/lower alkanol blend having an appreciable alkanol content, and which blend is miscible with the lubricant component.
According to the present invention a fuel-lubricant composition for a two-stroke engine comprises a blend of (i) 90 to 99 vol % of a fuel, which fuel contains, per hundred parts by vol, 99 to 65 parts gasoline and 1 to 35 parts in total of at least one CX to C8 alkanol; and (ii) 10 to 1 vol % of a lubricating oil comprising (a) from 20 to 60 mass % of mineral oil of conventional two-stroke grade; (b) from 5 to 40 mass % in total of at least one polyoxyalkylene glycol having a viscosity of from 5 to 30 cSt at 100"C; (c) from 20 to 60 mass % in total of at least one di-C8 to C,2 alkyl ester of a dicarboxylic acid; (d) from 0 to 8 mass % in total of at least one conventional VI improver; (e) from 0 to 5 mass % in total of at least one conventional detergent additive; and (f) from 0 to 5 mass % in total of one or more conventional additives; the components (a) to (f) totalling 100 mass Preferably the blend comprises 95 to 99 vol % of said fuel and 5 to 1 vol % of said lubricating oil.
Desirably, the fuel component (i) contains 5 to 35 vol % alkanol; suitably from 10 to 30 vol % and preferably from 1 5 to 25 vol %.
Advantageousiy the alkanol is a C, to C3 alkanol, with ethanol being particularly preferred.
It is a major advantage of compositions of the present invention that the alkanol need not be anhydrous. Thus, for example, technical ethanol containing upto 3 vol % of water can be employed.
This means, therefore, that the invention enables cheap commercial sources of technical alkanols to be employed.
Preferably the components (a) to (f) are present in, respectively, the following mass O/o: 30 to 50; 10 to 30; 30 to 50; 0.5 to 5; 0.1 to 4; and 0 to 5. These preferred quantities may be taken individually and not necessarily altogether.
The conventional 2-stroke mix additives are, for example, an anti-corrosion agent, pour depressant and anti-foaming agent. An anti-wear agent may also be employed. Thus, for example, calcium, barium or magnesium sulfonates or phenates (overbased materials or not, as required) can be employed with or without zinc dialkyl (or diaryl) dithiophosphates.
Unless stated otherwise, the amounts of components employed refer to amounts of active ingredients of those components and excludes, for example, any solvents, diluents etc for the components.
Preferably the polyoxyalkylene glycol is one having a viscosity in the range of 20 to 25 cSt at 1000C.
Preferred polyoxyalkylene glycols are polyoxyethylene glycol, polyoxypropylene glycol or polyoxyethylenepolyoxypropylene glycol. A polyoxyethylene-polyoxypropylene glycol of molecular weight of approximately 2000 is a particularly preferred component.
The diester component is preferably of an aliphatic dicarboxylic acid; suitably of the formula HOOC(CH2)nCOOH, where n is from 3 to 8. Thus the diester can be of, for example, glutaric acid and/or adipic acid.
Suitably a dioctyl-, diisononyl or diisodecyl ester is employed. The diester can be of an aromatic acid, preferably of phthalic acid.
When the compositions of this invention contain a VI improver, it may be selected from, for example, styrene-butadiene copolymers, polymethacrylates and polyisobutenes. When a detergent additive is employed it may be, for example, a metal petroleum sulphonate and/or phenate, overbased or not, as required.
The mineral oil of component (ii) of compositions according to the invention will be selected from those grades having the characteristics suitable for conventional 2-stroke formulations. Thus, for example, suitable grades are 90 Neutral, 100 Neutral and 1 50 Neutral and 600 Neutral.
The invention will now be further described with reference to the following, non-limitative, example.
Example Peugeot 103 2-stroke engine tests were conducted under the following conditions.
A new engine was run-in with the test fuel for 30 min at 4000 rpm at 50% throttle opening followed by 210 min at 4000 rpm at full throttle. The temperature of the spark plug joint is regu-lated at 1 800C by cooling the engine with an air flow.
Following running-in, an endurance test was conducted for 50 hr at 440 rpm at full load and with the spark plug joint still at 1 800C.
The number of spark plug mishaps during the 50 hr period was recorded. After the run the engine was allowed to cooi, was dismantled and the piston examined and merit rated.
Three 2-stroke fuels were compared in the tests. Fuel A was in accordance with the invention whilst fuels B and C were conventional fuels.
Table 1 refers to the compositions employed in, and the results obtained from, the tests.
The composition of fuel A in the test was 76 vol % regular gasoline, 20 vol % technical ethyl alcohol and 4 vol % of an oil composition X having, per hundred parts mass:- 3625 parts 1 50 Neutral mineral oil, 40 parts diisononyl phthalate, 20 parts EMKAPYL 2000 mol wt mixed polyglycol, 2.5 parts VI improver-styrene-butadiene copolymer, 0.75 parts detergent additives, and 0.5 parts in total of conventional additives.
It can be seen that the fuel A performs at least as well as, and in some instances markedly better than, the conventional 2-stroke fuels. This result has been achieved (i) with a 20% gasoline reduction over that employed in the conventional 2-stroke-fuels and (ii) with the use of technical ethyl alcohol, which is 97:3 alcohol:water.
Table 1 Peugeot 103 2-Stroke Engine Test
A B C 2-Stroke Mix Composition, Vol % Regular gasoline 76 96 Alcohol ~ 20 Engine Oil composition X 4 Conventional 2-Stroke Engine Oii (mineral) - 4 Engine Inspection After Test (Merit scale 0 (best) to 10) (1) (2) Ring Sticking 9 8.5 10 Piston Skirt Varnish 8.65 7 9 Groove No. 1,Carbon 5.65 3.5 9.9 Groove No. 1,Varnish 0.5 0 0.5 Groove No. 2, Carbon 7.25 9.9 10 Groove No. 2, Varnish 1.75 0 6.2 Number of Spark Plug Mishaps 1 6 3 (1) and (2) represent two commercially available 2-Stroke Oils

Claims (14)

Claims
1. A fuel-lubricant composition for a two-stroke engine, comprising a blend of (i) 90 to 99 vol % of a fuel, which fuel contains, per hundred parts by vol, 99 to 65 parts gasoline and 1 to 35 parts in total of at least one Ca to Ce alkanol: and (ii) 10 to 1 vol % of a lubricating oil comprising (a) from 20 to 60 mass % of mineral oil of conventional two-stroke grade; (b) from 5 to 40 mass % in total of at least one polyoxyalkylene glycol having a viscosity of from 5 to 30 cSt at 100 C; (c) from 20 to 60 mass % in total of at least one di-C8 to C,2 alkyl ester of a dicarboxylic acid; (d) from 0 to 8 mass % in total of at least one conventional VI improver; (e) from 0 to 5 mass % in total of at least one conventional detergent additive; and (f) from 0 to 5 mass % in total of one or more conventional additives; the components (a) to (f) totalling 100 mass %.
2. A composition as claimed in claim 1, comprising a blend of 95 to 99 voi % of said fuel and 5 to 1 vol % of said lubricating oil.
3. A composition as claimed in claim 1 or claim 2, wherein the fuel component (i) contains, per hundred parts by vol, 85 to 75 parts gasoline and 15 to 25 parts in total of said alkanoi(s).
5 10 15 20 25 30 35 40 45 n 50 55
4. A composition as claimed in any preceding claim, wherein one or more C, to Cs alkanols are employed in component (i).
5. A composition as claimed in any one of claims 1 to 3, wherein ethanol or technical ethanol is employed in component (i).
6. A composition as claimed in any one of the preceding claims, wherein component (ii) comprises: from 30 to 50 mass % of component (a), from 10 to 30 mass % of component (b).
from 30 to 50 mass % of component (c), from 0.5 to 5 mass % of component (d) from 0.1 to 4 mass % of component (e), and from 0 to 5 mass % of component (f); the components (a) to (f) totalling 100 mass
7. A composition as claimed in any preceding claim, wherein the polyoxyaikylene glycol has a viscosity of from 20 to 25 cSt at 1 00CC.
8. A composition as claimed in any preceding claim, wherein the polyoxyalkylene glycol is polyoxyethylene glycol, polyoxypropylene glycol or polyoxyethylene-polyoxypropylene glycol.
9. A composition as claimed in any preceding claim, wherein the said diester component (c) is of an aliphatic dicarboxylic acid.
10. A composition as claimed in claim 9, wherein the diester is of a dicarboxylic acid of formula HOOC(CH2)nCOOH, where n is from 3 to 8.
11. A composition as claimed in claim 10, wherein the diester is of glutaric acid and/or adipic acid.
12. A composition as claimed in any one of claims 1 to 8, wherein the said diester component (c) is of phthalic acid.
1 3. A composition as claimed in any preceding claim, wherein the VI improver, when employed, is selected from styrene-butadiene copolymers, polymethacrylates and polyisobutenes.
14. A composition as claimed in any preceding claim, wherein the detergent is a metal petroleum sulphonate.
1 5. A fuel-lubricant composition as claimed in claim 1 and substantially as herein described.
1 6. A fuel-lubricant composition as claimed in claim 1 and substantially as herein described with reference to the Example.
1 7. A method of operating a two-stroke engine, comprising employing as fuel a fuel-lubricant composition defined in any of the preceding claims.
GB8024773A 1980-07-29 1980-07-29 Two-stroke fuel-lubricant composition Expired GB2081299B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8024773A GB2081299B (en) 1980-07-29 1980-07-29 Two-stroke fuel-lubricant composition
FR8114626A FR2510597B1 (en) 1980-07-29 1981-07-28 COMPOSITION BASED ON A FUEL AND A LUBRICANT FOR A TWO-STROKE ENGINE

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Application Number Priority Date Filing Date Title
GB8024773A GB2081299B (en) 1980-07-29 1980-07-29 Two-stroke fuel-lubricant composition

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GB2081299A true GB2081299A (en) 1982-02-17
GB2081299B GB2081299B (en) 1984-01-18

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356726A2 (en) * 1988-08-06 1990-03-07 BASF Aktiengesellschaft Fuel compositions containing esters from polycarboxylic acids and long chain alcohols
EP0374461A1 (en) * 1988-11-17 1990-06-27 BASF Aktiengesellschaft Fuels for combustion machines
DE4017162A1 (en) * 1990-05-28 1991-12-05 Walter Zepf Ethanol based fuel additive for two=stroke engine - contg. n-heptane, water and lubricant, reducing emission of hydrocarbon(s), carbon mon:oxide, poly:cyclic and oxide(s) of nitrogen
EP0526942A1 (en) * 1991-07-30 1993-02-10 Shell Internationale Researchmaatschappij B.V. Liquid composition
WO1996018707A1 (en) * 1994-12-13 1996-06-20 Exxon Chemical Patents Inc. Fuel oil compositions
WO2000029520A1 (en) * 1998-11-12 2000-05-25 Exxon Chemical Patents Inc. Lubricating oil compositions comprising phthalate esters
US6300290B1 (en) 2000-06-02 2001-10-09 Infineum International Ltd Two-cycle lubricating oil
WO2009057027A1 (en) * 2007-10-31 2009-05-07 The Procter & Gamble Company Fuel system for improved fuel efficiency utilizing glycols in a spark ignition engine
US7951231B2 (en) * 2006-03-03 2011-05-31 Hans Riepe Liquid release agent

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110673A (en) * 1961-03-31 1963-11-12 California Research Corp Lubricant composition
GB1075237A (en) * 1964-06-11 1967-07-12 Shell Int Research Improved lubricant compositions and fuels suitable for use in 2-stroke internal combustion engines

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356726A2 (en) * 1988-08-06 1990-03-07 BASF Aktiengesellschaft Fuel compositions containing esters from polycarboxylic acids and long chain alcohols
EP0356726A3 (en) * 1988-08-06 1990-03-28 Basf Aktiengesellschaft Fuel compositions containing esters from polycarboxylic acids and long chain alcohols
EP0374461A1 (en) * 1988-11-17 1990-06-27 BASF Aktiengesellschaft Fuels for combustion machines
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Publication number Publication date
FR2510597A1 (en) 1983-02-04
FR2510597B1 (en) 1985-12-13
GB2081299B (en) 1984-01-18

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