Classifications

• • 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
  • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
  • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
  • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M133/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
• • 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
  • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
  • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
  • C10M129/04—Hydroxy compounds
  • C10M129/10—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
  • C10M129/14—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring containing at least 2 hydroxy 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
  • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
  • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
  • C10M129/26—Carboxylic acids; Salts thereof
  • C10M129/48—Carboxylic acids; Salts thereof having carboxyl groups bound to a carbon atom of a six-membered aromatic ring
  • C10M129/54—Carboxylic acids; Salts thereof having carboxyl groups bound to a carbon atom of a six-membered aromatic ring containing hydroxy 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
  • C10M167/00—Lubricating compositions characterised by the additive being a mixture of a macromolecular compound, a non-macromolecular compound and a compound of unknown or incompletely defined constitution, each of these compounds being essential
• • 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
  • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
• • 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
  • C10M2203/102—Aliphatic fractions
  • C10M2203/1025—Aliphatic fractions used as base material
• • 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
  • C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
• • 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
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/02—Hydroxy compounds
  • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
  • C10M2207/028—Overbased salts thereof
• • 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
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/26—Overbased carboxylic acid salts
  • C10M2207/262—Overbased carboxylic acid salts derived from hydroxy substituted aromatic acids, e.g. salicylates
• • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
• • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/28—Amides; Imides
• • 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
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
  • C10M2223/045—Metal containing thio derivatives
• • 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
  • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
  • C10M2227/06—Organic compounds derived from inorganic acids or metal salts
  • C10M2227/061—Esters derived from boron
  • C10M2227/062—Cyclic 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
  • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
  • C10M2229/02—Unspecified siloxanes; Silicones
• • 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
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/02—Groups 1 or 11
• • 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
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/04—Groups 2 or 12
• • 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
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/04—Detergent property or dispersant property
• • 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
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• • 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
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/54—Fuel economy
• • 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
  • C10N2040/252—Diesel engines

Definitions

• the present invention is applicable to the field of lubricants, and more particularly to the field of marine engine lubricants, especially for four-stroke or two-stroke marine engines, preferably for four-stroke marine engines. More particularly, the present invention relates to a lubricant composition comprising at least one base oil, at least one alkoxylated fatty amine, at least one copolymer of styrene and hydrogenated isoprene and at least one detergent.
• the lubricant composition according to the invention simultaneously has good fuel economy properties and good properties in engine cleanliness, especially in crankcase cleanliness.
• the present invention also relates to a method for reducing the fuel consumption of a ship implementing this lubricant composition.
• the present invention also relates to a composition of the additive concentrate type comprising at least one alkoxylated fatty amine, at least one copolymer of styrene and hydrogenated isoprene and at least one detergent.
• Document FR 2 974 1111 describes a two-cycle marine engine cylinder lubricant comprising at least one overbased detergent, at least one neutral detergent and at least one alkoxylated fatty amine having a BN (Base Number) determined according to the ASTM D standard. 2896 ranging from 100 to 600 milligrams of potash per gram of amine.
• BN Base Number
• An object of the present invention is to provide a lubricant composition overcoming all or in part the aforementioned drawbacks.
• Another object of the invention is to provide a lubricant composition whose formulation is easy to implement.
• Another object of the present invention is to provide a lubrication process for fuel savings.
• the invention thus relates to a lubricating composition for a marine engine 4-stroke or 2-stroke comprising:
• lubricant compositions for marine engines to reduce fuel consumption, while maintaining or even improving engine cleanliness, including crankcase cleanliness, compared to lubricating compositions classics for marine engines.
• a lubricating composition comprising at least one base oil, at least one alkoxylated fatty amine, at least one hydrogenated styrene-isoprene copolymer and at least one detergent.
• the present invention makes it possible to formulate lubricating compositions for a 4-stroke or 2-stroke marine engine, making it possible to combine both engine cleanliness and fuel economy savings.
• the lubricant compositions according to the invention have improved thermal resistance under severe conditions, and more particularly in the presence of fuel.
• the lubricant compositions according to the invention have improved storage stability and a viscosity that does not vary or very little over time.
• the invention relates to a lubricant composition for a marine 4-stroke or 2-stroke engine comprising:
• the lubricant composition consists essentially of:
• the lubricant composition consists essentially of:
• the invention also relates to a quill piston oil or TPEO ("Trunk Piston Engine Oil”) oil comprising a lubricant composition as defined above.
• TPEO Trank Piston Engine Oil
• TPEO oil is meant any oily composition for the lubrication of marine engines 4-stroke, including the housing and cylinders.
• the invention also relates to a cylinder oil comprising a lubricant composition as defined above.
• cylinder oil is meant any oily composition intended for the lubrication of cyclinders of marine engines 2-stroke.
• the invention also relates to a system oil comprising a lubricating composition as defined above.
• oil system is meant any oily composition for the lubrication of the lower part of marine engines 2-stroke, including the housing and crankshafts.
• the invention also relates to the use of a lubricant composition as defined above for lubricating a marine engine 4-stroke or 2-stroke.
• the invention also relates to the use of a lubricant composition as defined above to reduce the fuel consumption of a marine engine 4-stroke or 2-stroke.
• the invention also relates to the use of at least one alkoxylated fatty amine in a 2-cycle or 4-stroke marine engine lubricating composition comprising at least one base oil, at least one hydrogenated styrene-isoprene copolymer and at least one detergent, to improve the engine cleanliness of 4-stroke or 2-stroke marine engines, preferably the cleanliness of the 4-stroke or 2-stroke marine engine crankcase.
• the invention also relates to a concentrate-type composition of additives comprising:
• the invention also relates to a method for lubricating a 4-stroke or 2-cycle marine engine comprising at least one step of contacting the engine with a lubricant composition as defined above or obtained from the composition of concentrated type of additives as described above.
• the invention also relates to a method for reducing the fuel consumption of marine engines 4-stroke or 2-stroke comprising at least one step of contacting a mechanical part of the engine with a lubricant composition as defined above or obtained from the concentrate type composition of additives as defined above.
• the lubricating composition comprises at least one alkoxylated fatty amine.
• alkoxylated fatty amine means a molecule comprising at least one amine function substituted with at least one alkyl group and at least one alkylene oxide group.
• the alkyl group may be chosen from C 8 -C 3 o alkyl groups, preferably C 10 -C 24, more preferably C 12 -C 22 and even more preferentially C 6 -C 2 o.
• the alkylene oxide group may be selected from oxide groups of (C 2 -C 0) -alkylene, preferably (C 2 -C 4) -alkylene and more preferably (C 2 -C 3 ) -alkylene.
• the alkoxylated fatty amine is chosen from alkoxylated fatty monoamines or alkoxylated fatty polyamines.
• the alkoxylated fatty amine may be chosen from alkoxylated fatty monoamines or alkoxylated fatty diamines containing one or more fatty aliphatic chains, preferably comprising a C 8 -C 30 alkyl group, more preferably an alkyl group. in C 0 -C 24 , even more preferably a C 2 -C 22 alkyl group and advantageously a C 6 -C 20 alkyl group.
• the intrinsic BN of the alkoxylated fatty amines used in the lubricating composition according to the invention can range from 100 to 600 milligrams of potash per gram of alkoxylated fatty amine, preferably 100 to 500 milligrams of potash per gram of alkoxylated fatty amine, more preferably 100 to 300 milligrams of potash per gram of alkoxylated fatty amine.
• the alkoxylated fatty amine may be considered as a cationic surfactant whose polar head is constituted by at least one nitrogen atom and by at least one oxygen atom provided by the alkoxylation and the lipophilic portion is constituted by the or fatty aliphatic chains.
• the polar head of the alkoxylated fatty amine may consist of amine functions which are not very distant from each other (typically separated by 2 to 3 carbon atoms), and preferably in a small number (typically one or two amine functions), and preferably alkoxylated with a limited number of alkylene oxide functions, typically between 1 and 15, preferentially between 2 and 10, more preferably between 3 and 7, even more preferably between 3 and 4.
• the grouping The alkylene oxide may be selected from (C 2 -C 4 ) -alkylene oxide groups. This makes it possible to form a "compact" polar head, and thus to confer a surface-active character on these alkoxylated fatty amines.
• the alkoxylated fatty amine can be obtained by known alkoxylation processes, for example described in application FR 2 094 182, by bringing into presence at least one fatty amine and at least one alkylene oxide, at temperatures for example between 100 and 200 ° C, in the presence of a basic catalyst such as NaOH, KOH or NaOCH 3 .
• the starting fatty amine is mainly obtained from carboxylic acids. These acids are dehydrated in the presence of ammonia to give nitriles, which then undergo catalytic hydrogenation to lead to primary, secondary or tertiary amines.
• the starting fatty amine is obtained from carboxylic acids, preferably from fatty acids.
• fatty acid means a carboxylic acid with a saturated or unsaturated aliphatic chain, comprising from 8 to 30 carbon atoms, preferably from 10 to 24 carbon atoms, more preferably from 12 to 22 carbon atoms. and even more preferably from 16 to 20 carbon atoms.
• the starting fatty acids for obtaining fatty amines may be chosen from caprylic, pelargonic, capric, undecylenic, lauric, tridecylenic, myristic, pentadecyl, palmitic, margaric, stearic, nonadecyl, arachic, henicosanoic acids.
• the alkoxylated fatty amine is obtained from fatty acids containing from 10 to 24 carbon atoms, preferably from 12 to 22 carbon atoms, more preferably from 16 to 20 carbon atoms, and even more preferably from 16 to 18 carbon atoms.
• the fatty acids may be derived from the hydrolysis of triglycerides present in vegetable and animal oils, such as coconut oil, palm oil, olive oil, peanut oil, rapeseed oil, sunflower oil , soy, cotton, flax or beef tallow.
• vegetable and animal oils such as coconut oil, palm oil, olive oil, peanut oil, rapeseed oil, sunflower oil , soy, cotton, flax or beef tallow.
• Natural oils may have been genetically modified to enrich their content of certain fatty acids, for example rapeseed oil or oleic sunflower oil.
• the fatty amine used to prepare the alkoxylated fatty amine present in the lubricating composition according to the invention is obtained from natural, vegetable or animal resources. Treatments that lead to amines fatty oils from natural oils can result in mixtures of secondary and tertiary primary monoamines and polyamines.
• the alkoxylated fatty amine present in the lubricating composition according to the invention can be used to produce products containing, in variable proportions, all or part of the fatty amines corresponding to the following formulas:
• • s represents an integer greater than or equal to 1, preferably ranging from 1 to 12, more preferably from 1 to 5, advantageously from 1 to 2;
• R represents an integer ranging from 2 to 3;
• R 1 and R 2 which may be identical or different, independently represent a fatty chain derived from the fatty acid or acids derived from the oil used as starting reagent.
• a monoamine or fatty polyamine may contain several fatty chains from different fatty acids.
• These products can also be used in purified form, mainly containing a single type of amine, for example predominantly monoamines or predominantly diamines.
• a product will be used consisting of primary monoamines of the formula where R 1 may represent a plurality of fatty acids from a natural resource, for example tallow fat, or soybean oil, or coconut oil, or sunflower oil (oleic).
• R 1 may represent a plurality of fatty acids from a natural resource, for example tallow fat, or soybean oil, or coconut oil, or sunflower oil (oleic).
• R 1 may represent a plurality of fatty acids from a natural resource, for example tallow fat, or soybean oil, or coconut oil, or sunflower oil (oleic).
• amines obtained from oleic acid in particular primary monoamines of formula R 1 NH 2 or diamines of formula R [NH (CH 2 ) 3 ] -NH 2 where R 1 is the fatty chain, are advantageously used.
• oleic acid oleic acid.
• the alkoxylated fatty amine present in the lubricant composition according to the invention is soluble in the base oil matrix. The solubility of the alkoxylated fatty amine is primarily due to its fatty chain or chains. It is also more soluble that it has a limited number of alkylene oxide functions.
• the alkoxylated fatty amine is all the more soluble in that it does not comprise more than 15 alkylene oxide functions per amine molecule, preferably no more than 10 oxide functions. alkylene, more preferably not more than 7 alkylene oxide functions and even more preferably no more than 4 alkylene oxide functions.
• the alkoxylated fatty amine is chosen from monoamines comprising a ternary nitrogen.
• the alkoxylated fatty amine present in the lubricating composition according to the invention is therefore all the more effective if it is well dispersed or solubilized in the oil matrix.
• the alkoxylated fatty amine present in the lubricant composition according to the invention is not in the form of an emulsion or a microemulsion, but in dispersed form, or even solubilized in the oil matrix. .
• the alkoxylated fatty amine comprises at least one aliphatic chain comprising at least 8 carbon atoms, preferably at least 10 carbon atoms, preferably at least 12 carbon atoms, preferably at least 14 carbon atoms, more preferentially at least 16 carbon atoms, preferably from 16 to 20 carbon atoms.
• the lubricating composition according to the invention may comprise at least one alkoxylated fatty amine of formula (I):
• R 3 represents an alkane-di-yl group comprising from 2 to 10 carbon atoms
• R 4 represents a linear or branched, saturated or unsaturated alkyl group comprising from 12 to 22 carbon atoms
• R 5 represents an alkane-di-yl group comprising from 1 to 10 carbon atoms
• n an integer from 0 to 12;
• n an integer from 0 to 12;
• p represents an integer from 0 to 12;
• q 0 or 1
• the sum m + n + p is strictly greater than 0, preferably 1 ⁇ m + n + p ⁇ 15, preferably 2 ⁇ m + n + p ⁇ 10, more preferably 3 ⁇ m + n + p ⁇ 7, advantageously 3 ⁇ m + n + p ⁇ 4.
• the lubricating composition according to the invention may comprise at least one alkoxylated fatty amine of formula (I) in which:
• R 3 represents an alkane-di-yl group comprising from 2 to 4 carbon atoms, preferably from 2 to 3 carbon atoms;
• R 4 represents a linear or branched, saturated or unsaturated alkyl group comprising from 16 to 20 carbon atoms
• R 5 represents an alkane-di-yl group comprising from 2 to 4 carbon atoms
• ⁇ M is 0, 1, 2, 3, 4 or 5;
• n 0, 1, 2, 3, 4 or 5;
• P is 0, 1, 2, 3, 4 or 5;
• Q represents 0 or 1
• m + n + p represents an integer ranging from 1 to 15, preferentially from 2 to 10, more preferably from 3 to 7, advantageously from 3 to 4.
• alkoxylated fatty amine is chosen from compounds of formula (Ia):
• R 3 represents an alkane-di-yl group comprising from 2 to 4 carbon atoms, preferably from 2 to 3 carbon atoms;
• R 4 represents a linear or branched, saturated or unsaturated alkyl group comprising from 16 to 20 carbon atoms;
• M represents 0, 1 or 2
• n 0, 1 or 2;
• n represents an integer ranging from 1 to 4, preferably from 2 to 4.
• alkoxylated fatty amine is a compound of formula (Ia) in which:
• R 3 represents a group - (CH 2 CH 2 ) -
• R 4 represents a mono-unsaturated linear or branched alkyl group comprising from 16 to 18 carbon atoms
• M represents 0, 1 or 2
• n 0, 1 or 2;
• alkoxylated fatty amine As an example of an alkoxylated fatty amine according to the invention, mention may be made of the Ethomeen 0/12 product marketed by Akzo Nobel.
• the content by weight of alkoxylated fatty amine ranges from 0.1 to 10%, preferably from 1 to 9%, advantageously from 2 to 8% relative to the total weight of the composition. lubricating.
• the lubricant composition according to the invention comprises at least one hydrogenated styrene / isoprene copolymer.
• the hydrogenated styrene / isoprene copolymer may be chosen from hydrogenated styrene / isoprene copolymers in linear form or starved hydrogenated styrene / isoprene copolymers (also called "star polymers"), preferably from Starved hydrogenated styrene / isoprene copolymers.
• the hydrogenated styrene / isoprene copolymer may be chosen from hydrogenated styrene / isoprene block copolymers or random hydrogenated styrene / isoprene copolymers.
• the hydrogenated styrene / isoprene copolymer has a content of hydrogenated isoprene units, ranging from 50% to 98%, preferably from 60% to 98%, more preferably from 70% to 97%, even more preferentially from 75% at 96% by weight, based on the weight of hydrogenated styrene / isoprene copolymer.
• the hydrogenated styrene / isoprene copolymer has a content of styrene units, ranging from 2% to 50%, preferably from 2% to 40%, more preferably from 3% to 30%, even more preferentially from 4% to 25% by weight relative to the weight of hydrogenated styrene / isoprene copolymer.
• the hydrogenated styrene / isoprene copolymer according to the invention has a weight average molecular weight M w ranging from 100,000 to 800,000 daltons, preferably from 200,000 to 700,000 daltons, more preferably from 300,000 to 600,000 daltons, still more preferably from 400,000 to 500,000 daltons.
• the hydrogenated styrene / isoprene copolymer according to the invention has a number-average molecular mass M n ranging from 50,000 to 800,000 daltons, preferably from 75,000 to 600,000, more preferably from 100,000 to 500,000, still more preferably from 100,000 to 200,000.
• the hydrogenated styrene / isoprene copolymer according to the invention has a polydispersity index ranging from 1 to 4, preferably from 1.2 to 3.5, more preferably from 1.5 to 3. , 5, even more preferably from 2 to 3.
• copolymers of styrene and hydrogenated isoprene according to the invention include the Shellvis 300 or Shellvis 301 products marketed by Infineum.
• the content by weight of hydrogenated styrene and isoprene copolymer in the lubricating composition according to the invention is from 0.1% to 15% by weight, relative to the total mass of the lubricating composition, preferably from 0.1% to 10%, more preferably from 0.2% to 5%, advantageously from 0.5% to 2%.
• the styrene-hydrogenated isoprene copolymer used in the context of the present invention may be in the form of a dispersion in a mineral or synthetic oil, and more particularly in a group I oil according to the API classification. .
• the lubricating composition according to the invention comprises at least one detergent.
• the detergent used in the lubricating composition according to the invention may be chosen from the detergents commonly used in lubricating compositions.
• the detergent commonly used in the formulation of lubricating compositions is typically an anionic compound having a long lipophilic hydrocarbon chain and a hydrophilic head.
• the associated cation is typically a metal cation of an alkali or alkaline earth metal.
• the detergent may be selected from alkali metal or alkaline earth metal salts of carboxylic acids, sulfonates, salicylates, naphthenates, and phenates alone or in admixture.
• Detergents are named after the nature of the hydrophobic, carboxylate, sulphonate, salicylate, naphthenate or phenate chain.
• the alkali and alkaline earth metals are chosen from calcium, magnesium, sodium or barium, preferentially calcium.
• the detergent may be selected from non-overbased (or neutral) detergents or overbased detergents.
• Non-overbased or "neutral” detergents are used when the metal salts contain the metal in an approximately stoichiometric amount relative to the anionic group (s) of the detergent.
• overbased detergents when the metal is in excess (in excess of the stoichiometric amount relative to the anionic group (s) of the detergent).
• the excess metal providing the overbased detergent character is in the form of metal salts insoluble in the oil.
• the overbased detergents are in the form of micelles. These oil-soluble metal salt detergents thus stabilize the insoluble metal salts, keeping them in suspension in the lubricating composition.
• These micelles may contain one or more types of insoluble metal salts, stabilized by one or more types of detergents.
• the overbased detergents will be said to be of mixed type if the micelles comprise several types of detergents, different from each other by the nature of their hydrophobic chain.
• the detergent is chosen from salicylates, carboxylates, sulphonates and / or alkali and alkaline earth metal phenates, taken alone or as a mixture, preferably from salicylates, sulphonates and / or calcium phenates.
• the detergent present in the lubricant composition according to the invention may also be chosen from non-metallic and non-overbased detergents.
• the detergent is selected from amino and borated compounds.
• the detergent may be an amino and borated compound derived from the reaction between an alkyl derivative of salicylic acid and a dialkoxylated amine in the presence of boric acid.
• the detergent can thus be obtained by implementing the method described in WO 2007/081494.
• the detergent may be selected from amino and borated derivatives of salicylic acid.
• the detergent is a compound of formula (II)
• R 5 represents a linear or branched alkyl group comprising from 2 to 30 carbon atoms, preferably from 5 to 20 carbon atoms, advantageously from 15 to 20 carbon atoms;
• R 6 represents a linear or branched alkyl group comprising from 2 to 30 carbon atoms, preferably from 5 to 20 carbon atoms, advantageously from 12 to 20 carbon atoms
• R 7 represents a linear or branched alkyl group comprising from 2 to 30 carbon atoms, preferably from 5 to 20 carbon atoms, advantageously from 12 to 20 carbon atoms;
• R is in integer ranging from 1 to 100.
• the groups R 6 and R 7 are identical and both represent a linear or branched alkyl group comprising from 12 to 20 carbon atoms.
• the detergent is chosen from salicylates or alkali metal or alkaline earth metal phenates, taken alone or as a mixture.
• the detergent is chosen from calcium salicylates or calcium phenates, taken alone or as a mixture.
• the detergent is a mixture of an alkali or alkaline earth metal salicylate and a compound of formula (II).
• the detergent is a mixture of an alkali or alkaline earth metal phenate and a compound of formula (II).
• the detergent is a mixture of an alkali or alkaline earth metal phenate, an alkali or alkaline earth metal salicylate and a compound of formula (II).
• the combination of a compound of formula (II) and a phenate and / or an alkali or alkaline earth metal salicylate makes it possible to reinforce the thermal resistance of the lubricating composition according to US Pat. invention, especially under severe conditions, and more particularly in the presence of fuel.
• the content by weight of detergents in the lubricating composition according to the invention ranges from 1% to 20%, preferably from 1% to 15%, more preferably from 2% to 10% relative to to the total weight of the lubricating composition.
• the BN of the lubricating compositions according to the present invention is provided by the alkoxylated fatty amine and the detergent (s).
• the BN value of the lubricating compositions according to the present invention can vary from 5 to 100 mg of KOH / g of lubricating composition, preferably from 7 to 80 mg of KOH / g of lubricating composition. more preferably from 10 to 60 mg of KOH / g of lubricating composition.
• the BN value will be chosen according to the conditions of use of the lubricating compositions and in particular according to the sulfur content of the fuel used.
• the value of BN will be high and preferably comprised between 20 and 80 mg of KOH / g of lubricating composition. More preferably between 30 and 65 mg of KOH / g of lubricating composition.
• the BN value is low and is preferably between 5 and 20 mg of KOH / g of lubricating composition, more preferably between 10 and 15 mg of KOH / g of lubricating composition.
• the base oils used for the formulation of lubricant compositions according to the invention can be chosen from oils of mineral, synthetic or vegetable origin, as well as their mixtures.
• the mineral or synthetic oils generally used in the marine engine oil application belong to one of the classes defined in the API classification as summarized in the table below.
• the Group I mineral oils can be obtained by distillation of selected naphthenic or paraffinic crudes followed by purification of these distillates by processes such as solvent extraction, solvent or catalytic dewaxing, hydrotreatment or hydrogenation.
• the inorganic bases of Group I are for example the bases called Neutral Solvent (as for example 150NS, 330NS, 500NS or 600NS) or the Brightstock.
• the oils of Groups II and III are obtained by more severe purification methods, for example a combination among hydrotreatment, hydrocracking, hydrogenation and catalytic dewaxing.
• Group IV and V synthetic bases include poly-alpha olefins, polybutenes, polyisobutenes, alkylbenzenes.
• base oils can be used alone or as a mixture.
• a mineral oil can be combined with a synthetic oil.
• the lubricating base oil is selected from Group I or Group II base oils, alone or as a mixture.
• the lubricant composition according to the invention can be characterized by a viscometric grade SAE-20, SAE-30, SAE-40, SAE-50 or SAE-60 according to the SAEJ300 classification.
• Grade 20 oils have a kinematic viscosity at 100 ° C of between 5.6 and 9.3 cSt.
• Grade 30 oils have a kinematic viscosity at 100 ° C of between 9.3 and 12.5 cSt.
• Grade 40 oils have a kinematic viscosity at 100 ° C of between 12.5 and 16.3 cSt.
• Grade 50 oils have a kinematic viscosity at 100 ° C of between 16.3 and 21.9 cSt.
• Grade 60 oils have a kinematic viscosity at 100 ° C between 21.9 and 26.1 cSt.
• Kinematic viscosity is measured according to ASTM D7279 at 100 ° C.
• the lubricant composition according to the invention has a kinematic viscosity measured according to ASTM D7279 at 100 ° C. of between 5.6 and 26.1 cSt, preferably between 9.3 and 21.9 cSt. more preferably between 12.5 and 16.3 cSt.
• the content by weight of base oil in the lubricating composition according to the invention is from 30% to 90%, preferably from 40% to 90%, more preferably from 50% to 85%, advantageously from 65 to 85% relative to the total weight of the lubricant composition.
• the lubricating composition is not in the form of an emulsion. In one embodiment, the lubricant composition according to the invention is in the form of an anhydrous composition. Other additives
• the lubricant composition according to the invention may further comprise a dispersant.
• Dispersants are well-known additives used in the formulation of lubricating compositions, especially for application in the marine field. Their primary role is to maintain in suspension the particles present initially or appearing in the lubricant composition during its use in the engine. They prevent their agglomeration by playing on steric hindrance. They can also have a synergistic effect on the neutralization.
• the dispersants used as lubricant additives typically contain a polar group, associated with a relatively long hydrocarbon chain, generally containing from 50 to 400 carbon atoms.
• the polar group typically contains at least one nitrogen, oxygen or phosphorus element.
• the dispersant may be selected from succinic acid derivatives.
• succinic acid derivatives are meant in the sense of the invention, succinic acid esters or amide esters of succinic acid.
• the dispersant is chosen from compounds comprising at least one succinimide group.
• These compounds can then be treated with various compounds including sulfur, oxygen, formaldehyde, carboxylic acids and compounds containing boron or zinc to produce, for example, borated succinimides or zinc-blocked succinimides.
• the dispersant is selected from borated compounds comprising at least one succinimide group.
• the dispersant may be chosen from borated compounds comprising at least one substituted succinimide group or borated compounds comprising at least two substituted succinimide groups, the succinimide groups being connectable at their vertex level. carrying a nitrogen atom with a polyamine group.
• substituted succinimide group within the meaning of the present invention is meant a succinimide group of which at least one of the vertices is substituted by a hydrocarbon group comprising from 8 to 400 carbon atoms.
• the dispersant is chosen from borated compounds comprising at least one succinimide group substituted with a polyisobutene group.
• the dispersant is chosen from borated compounds comprising at least two succinimide groups each substituted by a polyisobutene group.
• the dispersant is chosen from borated compounds comprising at least two succinimide groups each substituted with a polyisobutene group and characterized by:
• a boron element mass content greater than or equal to 0.35% relative to the total mass of the dispersant.
• dispersant additive As an example of dispersant additive according to the invention, mention may be made of the product T161 B from Tianhe.
• the Mannich bases obtained by polycondensation of phenols substituted with alkyl groups, formaldehyde and primary or secondary amines, can also be used as dispersant in the lubricant composition according to the invention.
• the content by weight of dispersant is at least 0.1%, preferably from 0.1% to 10%, advantageously from 1% to 6% relative to the total weight of the composition. lubricating.
• the lubricant composition according to the invention may comprise at least one additional additive, especially chosen from those commonly used by those skilled in the art.
• the additional additive may be selected from antiwear additives, antioxidants, additional viscosity index improving polymers, pour point improvers, defoamers, thickeners, and mixtures thereof.
• the anti-wear additives protect the friction surfaces by forming a protective film adsorbed on these surfaces.
• anti-wear additives there is a wide variety of anti-wear additives. It is thus possible to mention phospho-sulfur-containing additives, such as metal alkylthiophosphates, in particular zinc alkylthiophosphates, and more specifically zinc dialkyidithiophosphates (or ZnDTPs).
• the alkyl groups of these zinc dialkyidithiophosphates preferably comprise from 1 to 18 carbon atoms.
• Amine phosphates, polysulfides, especially sulfur-containing olefins are also commonly used antiwear additives.
• Nitrogen-containing and sulfur-containing anti-wear additives such as, for example, metal dithiocarbamates, in particular molybdenum dithiocarbamates, are also encountered.
• the preferred anti-wear additive is ZnDTP.
• the weight content of anti-wear additive in the lubricant according to the invention is from 0.1% to 5%, preferably from 0.2% to 4%, more preferably from 0.2% to 2% by weight. to the total weight of the lubricating composition.
• Additional viscosity index-improving polymers according to the invention are any viscosity index-improving polymer other than the hydrogenated styrene-isoprene copolymer according to the invention.
• additional viscosity index improving polymers may be selected from polymeric esters, copolymer olefins (OCP) or polymethacrylates (PMA).
• the anti-foam additives may be chosen from polar polymers such as polymethylsiloxanes or polyacrylates.
• additives are generally present at a content by weight of 0.01 to 3% relative to the total weight of the lubricating composition.
• the subject of the invention is also a lubricating composition for a 4-stroke or 2-stroke marine engine comprising:
• the lubricant composition consists essentially of:
• the subject of the invention is also a lubricating composition for a 4-stroke or 2-stroke marine engine comprising:
• the lubricant composition consists essentially of:
• the set of characteristics and preferences presented for the base oil, the alkoxylated fatty amine, the hydrogenated styrene and isoprene copolymer, the detergent and the dispersant also apply to the above lubricating compositions.
• the lubricant composition according to the invention can be used in marine engines 4- stroke or 2-stroke.
• the lubricating composition is used in fast or medium speed 4-stroke engines, which operate respectively with distillates and fuel oils or heavy fuel oil.
• the fuel economy is particularly applicable to distillates used in fast 4-stroke engines.
• Fast four-stroke engines are used for the propulsion of small tonnage vessels and as power generation units on larger ships.
• Semi-fast 4-stroke engines are used for the propulsion of many ships, such as cargo ships, tankers, ferries and even some container carriers. They can also be used as power generation units on large vessels or in diesel-electric power plants.
• the lubricant composition is suitable for 4-cycle engines as a sheath-piston oil or TPEO oil.
• the lubricant composition is suitable for 2-cycle engines as a system oil or a cylinder oil.
• the invention also relates to the use of a lubricant composition as defined above for the lubrication of marine engines 4-stroke or 2-stroke.
• the invention relates to the use of a lubricant composition as defined above for the lubrication of marine 4-stroke engines.
• the invention also relates to the use of a lubricant composition as defined above for reducing the fuel consumption of marine engines 4-stroke or 2-stroke.
• the invention relates to the use of a lubricant composition as defined above to reduce the fuel consumption of 4-stroke marine engines.
• the reduction in fuel consumption is notably evaluated by tests on a marine engine test bench or by evaluation of the traction coefficient on the machine, in particular on the MTM (Mini Traction Machine) machine.
• the invention also relates to the use of at least one alkoxylated fatty amine in a 2-cycle or 4-stroke marine engine lubricating composition comprising at least one base oil, at least one copolymer of styrene and hydrogenated isoprene and at least one detergent, to improve the engine cleanliness of 4-stroke or 2-stroke marine engines, preferably the cleanliness of the 4-stroke or 2-stroke marine engine crankcase.
• Engine cleanliness is assessed in particular by continuous ECBT and ECBT continuous fuel methods.
• the set of characteristics and preferences presented for the base oil, the alkoxylated fatty amine, the hydrogenated styrene and isoprene copolymer and the detergent also apply to the above use.
• the compounds as defined above contained in the lubricant composition according to the invention may be incorporated into the composition.
• lubricant as separate additives, in particular by separate addition of these in the base oils. However, they can also be integrated in a concentrate of additives for marine lubricating composition.
• composition of concentrated additive type comprising:
• the subject of the invention is also a composition of the concentrated type of additives
• At least one dispersant is at least one dispersant.
• the additive concentrate type composition may comprise: from 0.5 to 50% of at least one alkoxylated fatty amine,
• the concentrate-type composition of additives may comprise:
• the composition of the additive concentrate type according to the invention may be added at least one base oil to obtain a lubricant composition according to the invention.
• Another subject of the invention relates to a method of lubricating a 4-stroke or 2-stroke marine engine, said method comprising at least one step of contacting the engine with the lubricant composition as described above or obtained from of the additive concentrate type composition as described above.
• the set of characteristics and preferences presented for the lubricant composition or for the additive concentrate type composition also applies to the lubrication process according to the invention.
• Another subject of the invention relates to a method for reducing the fuel consumption of a 4-stroke or 2-stroke marine engine comprising at least one step of contacting a mechanical part of the engine with the lubricating composition such that defined above or obtained from the concentrate type composition of additives as defined above.
• the set of characteristics and preferences presented for the lubricant composition or for the composition of the additive concentrate type also applies to the process for reducing the fuel consumption according to the invention.
• base oils of group I in particular called Neutral Solvent 150NS, 330NS or 600NS, respectively with a viscosity at 40 ° C. of 30 cSt, 66 cSt and 120 cSt measured according to the ASTM D7279 standard, a hydrogenated styrene / isoprene copolymer (SI H) having a star-shaped conformation, diluted with 9% of active ingredient in a Group I base oil (Shellvis 301 marketed by the company Infineum),
• SI H hydrogenated styrene / isoprene copolymer
• R 5 represents a group C 8 H 37 .
• R 6 and R 7 both represent a group Ci 6 H 33 ,
• R represents an integer ranging from 1 to 100
• a borated compound-type dispersant comprising at least one succinimide group substituted with a polyisobutene group (T161 B marketed by Tianhe) - a zinc dithiophosphate anti-wear additive,
• the content of 13.70% of overbased detergent in the composition L- ⁇ corresponds to an 8% content of overbased detergent in the presence of ethoxylated oleic monoamine, this content making it possible to obtain a stable composition that can be evaluated.
• compositions L 5 The physicochemical characteristics of compositions L 5 are described in Table II.
• composition L 2 does not comprise hydrogenated styrene / isoprene copolymer, which explains the drop in the viscosity index and the increase in the kinematic viscosity.
• the thermal behavior of compositions L-1 to L 5 was therefore evaluated by means of the continuous ECBT test, by which the mass of deposits (in mg) generated under specified conditions is measured. The lower the mass, the better the thermal resistance and therefore the better the engine cleanliness.
• This test simulates a high temperature engine piston on which the lubricant from the crankcase is sprayed.
• the test uses aluminum beakers that simulate the shape of pistons. These beakers were placed in a glass container, maintained at a controlled temperature of the order of 60 ° C.
• the lubricant was placed in these containers, themselves equipped with a wire brush, partially immersed in the lubricant. This brush was driven in a rotary motion at a speed of 1000 revolutions per minute, which creates a projection of lubricant on the lower surface of the beaker.
• the beaker was maintained at a temperature of 310 ° C by an electric heating resistor controlled by a thermocouple.
• compositions according to the invention have good thermal resistance and thus make it possible to improve engine cleanliness.
• the lubricating compositions have improved thermal resistance compared to lubricating compositions comprising a hydrogenated styrene / isoprene copolymer alone. It should also be noted that the lubricant compositions according to the invention retain a good thermal resistance, despite the presence of the hydrogenated styrene / isoprene copolymer known for its very low heat resistance.
• the continuous ECBT fuel test simulates a high-temperature engine piston on which crankcase lubricant is sprayed.
• the lubricant was polluted by heavy fuel oil (2.5% m / m relative to the quantity of lubricant) to simulate the pollution of a motor lubricant by residues and unburned fuel after combustion.
• the apparatus is identical to that of the continuous ECBT test of Example 1.
• the lubricant mixed with heavy fuel oil was placed in the glass container maintained at a temperature of about 60 ° C.
• the metal beaker was maintained at a temperature of 250 ° C, the test had a duration of 12h and the projection of the lubricant was continuous during these 12 hours.
• compositions according to the invention have good thermal resistance, and thus make it possible to maintain good engine cleanliness, even under severe conditions, especially in the presence of heavy fuel oil.
• the lubricating compositions have improved thermal resistance under improved conditions with respect to lubricating compositions comprising a hydrogenated styrene / isoprene copolymer alone. It should also be noted that the lubricant compositions according to the invention retain good thermal resistance under severe conditions, despite the presence of the hydrogenated styrene / isoprene copolymer known for its very low thermal resistance under such conditions.
• the measured tensile coefficient makes it possible to effectively predict the fuel consumption gain of a lubricating composition; the lower the traction coefficient, the better the consumption of fuel oil.
• compositions L-1 to L 4 were evaluated according to the method above; the results representing the tensile coefficient of each composition are grouped together in Table V.
• the tests are organized according to a precise protocol which consists of supervising any test carried out with a lubricant candidate between two tests carried out with the reference lubricant. This makes it possible to guarantee the stability of operation of the engine as well as the statistically significant nature of the differences in consumption measured between lubricants.
• the reference lubricant is a commercial oil for SAE40 and BN 30 viscosity grade semi-rapid engine. Reference lubricant and composition L 4 were evaluated.
• Example 3 The results confirm the results of Example 3, in that the lubricant composition L 4 according to the invention makes it possible to reduce the fuel consumption of a marine engine.

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• 2014
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  • 2014-03-05 US US14/772,997 patent/US20160017251A1/en not_active Abandoned
  • 2014-03-05 WO PCT/EP2014/054280 patent/WO2014135596A1/fr active Application Filing
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