EP4504882A1 - Graisses lubrifiantes biodégradables - Google Patents
Graisses lubrifiantes biodégradablesInfo
- Publication number
- EP4504882A1 EP4504882A1 EP23717123.6A EP23717123A EP4504882A1 EP 4504882 A1 EP4504882 A1 EP 4504882A1 EP 23717123 A EP23717123 A EP 23717123A EP 4504882 A1 EP4504882 A1 EP 4504882A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- particle size
- thickener
- composition according
- biodegradability
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- 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
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/06—Mixtures of thickeners and additives
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- 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
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/02—Mixtures of base-materials and thickeners
-
- 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
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/10—Metal oxides, hydroxides, carbonates or bicarbonates
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- 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
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
-
- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
-
- 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
- C10M2207/28—Esters
- C10M2207/2805—Esters used as base material
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- 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
- C10M2227/006—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 used as thickening agents
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- 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
- C10N2020/055—Particles related characteristics
- C10N2020/06—Particles of special shape or size
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- 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
- C10N2020/081—Biodegradable compounds
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- 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
- C10N2030/64—Environmental friendly compositions
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- 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
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Form in which the lubricant is applied to the material being lubricated semi-solid; greasy
Definitions
- the present invention relates to the field of greases, particularly for the off-road, agricultural and wind markets, having improved anti-wear and extreme pressure properties and high biodegradability.
- lubricating greases are used, which are solid or semi-fluid substances resulting from the dispersion of a thickener in a liquid lubricant, possibly incorporating additives which give them particular properties.
- the greases currently used generally include mineral oils of fossil origin which do not have high biodegradability.
- Document US 2018/0030367 discloses a grease composition.
- It is therefore an object of the present invention to provide a grease composition comprising a base oil and a thickener both biodegradable, grease which also has excellent anti-wear and extreme pressure properties and good stickiness.
- the present invention relates to a grease composition
- a grease composition comprising, relative to the total weight of the grease composition: a) from 70 to 95% by weight of base oil(s) each having biodegradability at 28 days of at least 60%, as measured according to OECD standard 301B, b) from 1 to 20% by weight, preferably from 2 to 20% by weight, of thickener(s) chosen from metal salts of fatty acid, each thickener having a 28-day biodegradability of at least 60%, as measured according to OECD 301B standard, c) from 0.5 to 10% by weight of calcium carbonate having a D50 particle size greater than or equal to 3 pm and a D90 particle size greater than or equal to 10 pm.
- the fat composition according to the invention is characterized in that it has a biodegradability at 28 days of at least 60%, calculated from the biodegradability at 28 days of the oil(s). ) of base and thickener(s), the biodegradability at 28 days of base oil(s) and thickener(s) being measured according to the OECD 301B method.
- the thickener is chosen from optionally hydroxylated lithium and fatty acid salts, optionally hydroxylated calcium and fatty acid salts and mixtures thereof, preferably from optionally hydroxylated lithium and fatty acid salts. , preferably from 12-hydroxy lithium stearate.
- the base oils are chosen from ester oils.
- the calcium carbonate has a D50 particle size ranging from 3 to 20 ⁇ m and a D90 particle size ranging from 10 to 50 ⁇ m.
- the grease composition according to the invention further comprises at least one extreme pressure additive, preferably in an amount ranging from 1 to 15% by weight, relative to the total weight of the composition.
- the grease composition according to the invention is free of anti-wear additive of the amine phosphate type, and of the zinc diamyl dithiocarbamate type and of the zinc dialkyl dithiophosphate type.
- the fat composition according to the invention comprises at least 40% by weight of carbon of biological origin, preferably at least 45% by weight of carbon of biological origin, relative to the total weight of the carbon atoms of the composition.
- the invention also relates to the use of the grease composition according to the invention, in a non-road, agricultural or wind power device.
- the non-road, agricultural or wind device is chosen from construction machinery, agricultural machines and wind turbines.
- the grease composition according to the invention has excellent anti-wear and extreme pressure properties and good stickiness, even in the absence of an anti-wear additive.
- the grease composition according to the invention will typically present the following properties: extreme pressure properties in the 4-ball test according to the ASTM D2596 standard of 500 kgf. low wear of around 0.5 mm according to the ASTM D2266 standard.
- the fat composition according to the invention will typically have high biodegradability.
- quantities in a product are expressed by weight, relative to the total weight of the product.
- the present invention relates to a grease composition
- a grease composition comprising, relative to the total weight of the grease composition: a) from 70 to 95% by weight of base oil(s) each having a 28-day biodegradability of at least 60 %, as measured according to OECD standard 301B, b) from 2 to 20% by weight of thickener(s) chosen from metal salts of fatty acids, each thickener having a biodegradability at 28 days at minus 60%, as measured according to OECD standard 301B, c) from 0.5 to 10% by weight of calcium carbonate having a D50 particle size greater than or equal to 3 pm and a D90 particle size greater than or equal to 10 pm, optionally from 1 to 15% by weight of additive(s), said additives being different from base oils a), different from thickeners b) and different from calcium carbonate c).
- the fat composition according to the invention is biodegradable.
- a “compound” will be said to be “biodegradable” if it has a biodegradability after 28 days of at least 60%, as measured according to the OECD 301B standard.
- the “fat composition” will be said to be “biodegradable” if the biodegradability calculated from the biodegradability of the base oil(s) and the thickener(s) weighted by the proportions said base oil(s) and thickener(s) in said fat composition is at least 60% at 28 days.
- the fat composition includes:
- the grease composition used according to the invention comprises one or more biodegradable base oils.
- the fat composition comprises at least one base oil of renewable origin, for example of plant or animal origin.
- base oils of renewable origin represent at least 75% by weight of the total weight of the base oils.
- all the base oils of the fat composition according to the invention have a biodegradability at 28 days of at least 60%, as measured according to the OECD 301B standard.
- It can be a mixture of several base oils, for example a mixture of two, three, or four base oils.
- the grease composition comprises at least one ester type base oil.
- ester type base oil(s) represent at least 50% by weight, preferably at least 70% by weight, of the total weight of the base oils.
- esters that can be used as base oils we can cite polyol esters.
- the polyol esters which can be used as base oil, are for example diesters, triesters, tetraesters or complex esters comprising more than four ester functions.
- the acids which can be used to form the esters are monocarboxylic acids or dicarboxylic acids.
- the monocarboxylic acids have from 3 to 22 carbon atoms, more preferably from 4 to 20, even more preferably from 6 to 18, even more preferably from 8 to 16, even more preferably from 10 to 12.
- Examples include hexanoic, octanoic, 2-ethylhexanoic, isooctanoic, nonanoic, decanoic, isodecanoic, oleic and stearic acids. Saturated acids containing no unsaturations are preferably used.
- the dicarboxylic acids have from 3 to 22 carbon atoms, more preferably from 4 to 20, even more preferably from 6 to 18, even more preferably from 8 to 16, even more preferably from 10 to 12.
- Examples include succinic, adipic, azelaic and sebacic acids.
- esters are monoalcohols (formation of diesters with dicarboxylic acids), dialcohols, trialcohols or tetraalcohols.
- the preferred alcohols are polyols such as neopentyl glycol, trimethylolpropane, pentaerythritol.
- the base oil or mixture of base oils preferably have a viscosity at 40°C greater than or equal to 100 cSt, preferably greater than or equal to 200 cSt, more preferably greater than or equal to 300 cSt, preferably still greater than or equal to 400 cSt, preferably still greater than or equal to 500 cSt.
- Viscosity is preferably measured according to ASTM D445.
- the base oil(s) preferably represent 70 to 95% by weight, preferably 75 to 90% by weight, of the total weight of the fat composition.
- the base oils which can be used in the present invention are commercially available products.
- the fat composition according to the invention comprises at least one thickener chosen from fatty acid metal salts.
- the grease composition according to the invention is free of polyurea type thickeners.
- the metal salts of fatty acids can be chosen from metal salts of monofatty acids or metal salts of difatty acids, said monoacids or diacids preferably comprising from 8 to 28 carbon atoms.
- Long-chain fatty acids are preferably used, typically comprising from 10 to 28 carbon atoms, saturated or unsaturated, optionally hydroxylated.
- Long-chain fatty acids are, for example, capric, lauric, myristic, palmitic, stearic, arachidic, behenic, oleic, linoleic, erucic, and their hydroxylated derivatives. 12-hydroxystearic acid is the preferred derivative.
- Lithium 12-hydoxy stearate is the preferred thickener for the grease composition according to the invention.
- These long-chain fatty acids generally come from vegetable oils, for example palm oil, castor oil, rapeseed oil, sunflower oil, etc., or from animal fats (tallow, whale oil, etc.).
- So-called simple soaps can be formed using one or more long-chain fatty acids, typically monoacids.
- So-called complex soaps can also be formed by using one or more long-chain fatty acids in combination with one or more short hydrocarbon-chain dicarboxylic acids comprising a maximum of 10 carbon atoms.
- the carboxylic acids with a short hydrocarbon chain are chosen from monoacids and dicarboxylic acids preferably comprising from 3 to 10 carbon atoms.
- the saponification agent used to make the soap may be a metallic compound of lithium, sodium, calcium, aluminum, preferably lithium and calcium, and preferably a hydroxide, oxide or carbonate of these metals.
- One or more metal compounds having or not having the same metal cation, can be used in the greases according to the invention. We can thus combine lithium soaps, combined with calcium soaps in a lesser proportion.
- the thickener(s) preferably represent 3 to 20% by weight, preferably 4 to 15% by weight, more preferably 5 to 12% by weight, of the total weight of the fat composition.
- the thickeners which can be used in the present invention are commercially available products.
- the grease composition according to the invention comprises calcium carbonate having a D50 particle size greater than or equal to 3 ⁇ m and a D90 particle size greater than or equal to 10 ⁇ m.
- particles having a particle size D50 of X pm means that 50% by volume of the particles have a size less than X pm and that 50% by volume of the particles have a size greater than X pm.
- particles having a D90 particle size of X pm means that 90% by volume of the particles have a size less than X pm and that 10% by volume of the particles have a size greater than X pm.
- the particle size D50 and D90 can be measured by laser diffraction, using any method well known to those skilled in the art. An example of the method is detailed in the experimental part.
- the calcium carbonate has a D50 particle size ranging from 3 to 20 ⁇ m and a D90 particle size ranging from 10 to 50 ⁇ m, preferably a D50 particle size ranging from 4 to 15 ⁇ m and a D90 particle size ranging from 10 to 15 ⁇ m. 40 p.m.
- the calcium carbonate has a D50 particle size ranging from 5 to 10 ⁇ m and a D90 particle size ranging from 10 to 30 ⁇ m.
- the inventors have discovered that calcium carbonate having a particle size as defined in the present invention makes it possible to obtain both good anti-wear properties and good extreme pressure properties.
- Calcium carbonate represents 0.5 to 10% by weight, preferably 1 to 5% by weight, more preferably 2 to 4% by weight of the total weight of the fat composition according to the invention.
- the calcium carbonate particles which can be used in the present invention are commercially available products.
- the grease composition according to the invention optionally comprises one or more additional additives different from the base oils a), different from the thickeners b) and different from the calcium carbonate c), defined previously.
- the complementary additive(s) are chosen from extreme pressure additives, antioxidant additives, anti-corrosion additives, metal passivating additives, and mixtures thereof.
- additives can be introduced individually and/or in the form of a mixture.
- the fat composition according to the invention may comprise at least one antioxidant additive.
- the antioxidant additive can be chosen from phenolic or amino type antioxidants.
- the antioxidant additives may in particular be chosen from sterically hindered phenols, sterically hindered phenol esters and sterically hindered phenols comprising a thioether bridge, and mixtures thereof.
- Amino compounds are another class of antioxidant additives that can be used, possibly in combination with phenolic antioxidant additives.
- Examples of amino compounds are aromatic amines, for example aromatic amines of formula NR 10 R n R 12 in which R 10 represents an aliphatic group or an aromatic group, optionally substituted, R 11 represents an aromatic group, optionally substituted, R 12 represents a hydrogen atom, an alkyl group, an aryl group or a group of formula R 13 S(O) Z R 14 in which R 13 represents an alkylene group or an alkenylene group, R 14 represents an alkyl group, a alkenyl group or an aryl group and z represents 0, 1 or 2.
- amine-type antioxidants mention may be made of diphenylamines, diphenylamines substituted by at least one C1-C12 alkyl group, N,N'-dialkyl- aryl diamines and their mixtures.
- the fat composition according to the invention may comprise from 0.05 to 5% by weight, preferably from 0.1 to 4% by weight or from 0.2 to 2% by weight of antioxidant agent, relative to the total weight. of the composition.
- the grease composition comprises at least one extreme pressure additive.
- the grease composition comprises from 2 to 10% by weight of at least one extreme pressure additive, relative to the total weight of the grease composition.
- the extreme pressure additive is chosen from sulfur-containing olefins, sulfur-containing fatty acid esters, and mixtures thereof.
- Sulfur-containing fatty acid esters can be obtained by sulfurizing fatty acid esters.
- Said fatty acid esters are obtained by reaction between one or more fatty acids and alcohols of all kinds or by transesterification between one or more fatty acid esters and alcohols of all kinds.
- sulfur fatty acid ester is meant an ester of at least one sulfur fatty acid, it being understood that most of the time it is an ester of a mixture of sulfur fatty acids.
- the fatty acids which can be used to form the sulfur-containing fatty acid esters are all fatty acids comprising from 6 to 24 carbon atoms, preferably from 14 to 22 carbon atoms, more preferably from 16 to 20 carbon atoms.
- Fatty acids comprising 18 carbon atoms are the majority fatty acids, that is to say they are present at a mass concentration of at least 50% relative to the total mass of sulfur fatty acid ester. .
- the sulfur-containing fatty acid esters may be sulfur-containing fatty acid monoesters, sulfur-containing fatty acid diesters, sulfur-containing fatty acid triesters or sulfur-containing fatty acid polyesters taken alone or in a mixture.
- Preferred sulfur fatty acid monoesters are C1-C4 alkyl monoesters, such as methyl monoesters, ethyl monoesters, n-propyl monoesters, z-propyl monoesters, rz monoesters -butyl, s-butyl monoesters, z-butyl monoesters.
- the monoester is a methyl monoester.
- the sulfur fatty acid ester is a sulfur fatty acid methyl ester.
- sulfur-containing fatty acid triesters mention may be made of sulfur-containing fatty acid triglycerides which will be completely or partially esterified and will therefore possibly comprise in addition to triesters, diesters and/or monoesters.
- sulfurized fatty acid polyesters mention may be made of sulfurized fatty acid pentaerythritol esters.
- the sulfurized olefins are preferably sulfurized olefins and can for example be obtained by a reaction of sulfurization of olefins with sulfur, hydrogen sulfide or hydrated alkali metal sulfides, for example sodium sulfide.
- An example of processes for preparing such sulfurized olefins is for example described in patents US 4344854 and US 5135670.
- a very wide range of olefins can be sulfurized in this way.
- sulfurized olefins are manufactured from isobutylene, diisobutylene, triisobutylene, tripropylene, or tetrapropylene.
- the sulfurized olefins are chosen from sulfurized isobutylene (in English “Sulfurized IsoButylenes” or SIB).
- the grease composition according to the invention does not comprise a polymer.
- the inventors have in fact discovered that the grease composition according to the invention had good stickiness without adding a polymer type additive.
- the grease composition according to the invention is substantially free of anti-wear of the amine phosphate type, of the zinc diamyl dithiocarbamate type and of the zinc dialkyl dithiophosphate type.
- substantially free is meant a proportion less than 0.01% by weight.
- the grease composition according to the invention is free of anti-wear of the amine phosphate type, free of anti-wear of the zinc diamyl dithiocarbamate type and free of anti-wear of the dialkyl type zinc dithiophosphate.
- the grease composition is substantially free of anti-wear additives, preferably completely free of anti-wear additives.
- the inventors have in fact discovered that the grease composition according to the invention had good anti-wear properties without adding an anti-wear additive, in particular of the type amine phosphate, zinc diamyl dithiocarbamate type and/or zinc dialkyl dithiophosphate type.
- the grease composition according to the invention comprises, relative to the total weight of the grease composition: from 70 to 95% by weight, preferably from 75 to 90% by weight, of oil(s ) of base, from 3 to 20% by weight, preferably from 4 to 15% by weight of thickener(s) chosen from lithium salts and optionally hydroxylated fatty acid comprising from 10 to 28 atoms of carbon, from 0.5 to 10% by weight, preferably from 1 to 5% by weight of calcium carbonate having a D50 particle size ranging from 3 to 20 pm and a D90 particle size ranging from 10 to 50 pm.
- the grease composition according to the invention comprises, relative to the total weight of the grease composition: from 70 to 95% by weight, preferably from 75 to 90% by weight, of oil(s ) of base, from 3 to 20% by weight, preferably from 4 to 15% by weight of thickener(s) chosen from lithium salts and optionally hydroxylated fatty acid comprising from 10 to 28 atoms of carbon, from 0.5 to 10% by weight, preferably from 1 to 5% by weight of calcium carbonate having a D50 particle size ranging from 4 to 15 pm and a D90 particle size ranging from 10 to 40 pm.
- the grease composition according to the invention comprises, relative to the total weight of the grease composition: from 70 to 95% by weight, preferably from 75 to 90% by weight, of oil(s ) base comprising at least one ester oil, from 3 to 20% by weight, preferably from 4 to 15% by weight of thickener(s) comprising at least one lithium salt and optionally hydroxylated fatty acid comprising 10 with 28 carbon atoms, from 0.5 to 10% by weight, preferably from 1 to 5% by weight of calcium carbonate.
- the grease composition according to the invention comprises, relative to the total weight of the grease composition: from 70 to 95% by weight, preferably from 75 to 90% by weight, of oil(s ) base comprising at least one ester oil, from 3 to 20% by weight, preferably from 4 to 15% by weight of thickener(s) comprising at least 12-hydroxy lithium stearate, from 0.5 to 10 % by weight, preferably from 1 to 5% by weight of calcium carbonate having a D50 particle size ranging from 3 to 20 pm and a D90 particle size ranging from 10 to 50 pm.
- the grease composition according to the invention comprises, relative to the total weight of the grease composition: from 70 to 95% by weight, preferably from 75 to 90% by weight, of oil(s ) base comprising at least one ester oil, from 3 to 20% by weight, preferably from 4 to 15% by weight of thickener(s) comprising at least 12-hydroxy lithium stearate, from 0.5 to 10 % by weight, preferably from 1 to 5% by weight of calcium carbonate having a D50 particle size ranging from 4 to 15 pm and a D90 particle size ranging from 10 to 40 pm.
- the grease composition according to the invention comprises, relative to the total weight of the grease composition: from 70 to 95% by weight, preferably from 75 to 90% by weight, of oil(s ) base including at least one ester oil, from 3 to 20% by weight, preferably from 4 to 15% by weight of thickener(s) chosen from lithium salts and optionally hydroxylated fatty acid comprising from 10 to 28 carbon atoms, from 0.5 to 10% by weight, preferably from 1 to 5% by weight of calcium carbonate, from 1 to 15% by weight, preferably from 2 to 10% by weight, of at least one additive chosen from extreme pressure additives.
- the grease composition according to the invention comprises, relative to the total weight of the grease composition: from 70 to 95% by weight, preferably from 75 to 90% by weight, of oil(s ) base including at least one ester oil, from 3 to 20% by weight, preferably from 4 to 15% by weight of thickener(s) chosen from lithium salts and optionally hydroxylated fatty acid comprising from 10 to 28 carbon atoms, from 0.5 to 10% by weight, preferably from 1 to 5% by weight of calcium carbonate, from 1 to 15% by weight, preferably from 2 to 10% by weight, at least one additive chosen from extreme pressure additives chosen from sulfur-containing fatty acid esters, sulfur-containing olefins and mixtures thereof.
- the grease composition according to the invention comprises, relative to the total weight of the grease composition: from 70 to 95% by weight, preferably from 75 to 90% by weight, of oil(s ) base including at least one ester oil, from 3 to 20% by weight, preferably from 4 to 15% by weight of thickener(s) chosen from lithium salts and optionally hydroxylated fatty acid comprising from 10 to 28 carbon atoms, from 0.5 to 10% by weight, preferably from 1 to 5% by weight of calcium carbonate having a D50 particle size ranging from 5 to 10 pm and a D90 particle size ranging from 10 to 30 pm, from 1 to 15% by weight, preferably from 2 to 10% by weight, of at least one additive chosen from extreme pressure additives.
- the grease composition according to the invention comprises, relative to the total weight of the grease composition: from 70 to 95% by weight, preferably from 75 to 90% by weight, of base oil(s) including at least one ester oil, from 3 to 20% by weight, preferably from 4 to 15% by weight of lithium 12-hydroxystearate thickener, from 0.5 to 10% by weight, preferably from 1 to 5% by weight of calcium carbonate having a particle size D50 ranging from 3 to 20 ⁇ m and a particle size D90 ranging from 10 to 50 ⁇ m, from 1 to 15% by weight, preferably from 2 to 10% by weight, of at least one additive chosen from extreme pressure additives.
- the grease composition according to the invention comprises, relative to the total weight of the grease composition: from 70 to 95% by weight, preferably from 75 to 90% by weight, of oil(s ) base including at least one ester oil, from 3 to 20% by weight, preferably from 4 to 15% by weight of thickener lithium 12-hydroxystearate, from 0.5 to 10% by weight, preferably from 1 to 5% by weight of calcium carbonate having a particle size D50 ranging from 4 to 15 pm and a particle size D90 ranging from 10 to 40 pm, from 1 to 15% by weight, preferably from 2 to 10% by weight, at least one additive chosen from extreme pressure additives.
- the grease composition according to the invention comprises, relative to the total weight of the grease composition: from 70 to 95% by weight, preferably from 75 to 90% by weight, of oil(s ) base including at least one ester oil, from 3 to 20% by weight, preferably from 4 to 15% by weight of thickener lithium 12-hydroxystearate, from 0.5 to 10% by weight, preferably from 1 5% by weight of calcium carbonate having a D50 particle size ranging from 4 to 15 pm and a D90 particle size ranging from 10 to 40 pm, from 1 to 15% by weight, preferably from 2 to 10% by weight, of at least one additive chosen from extreme pressure additives chosen from sulfur-containing fatty acid esters, sulfur-containing olefins and their mixtures.
- the grease composition according to the invention preferably has a viscosity at 40°C greater than or equal to 100 cSt, more preferably greater than or equal to 200 cSt, more preferably greater than or equal to 300 cSt, more preferably greater than or equal to at 400 cSt, preferably even greater than or equal to 500 cSt.
- Viscosity is preferably measured according to ASTM D445.
- the fat composition according to the invention preferably has a carbon content of biological origin greater than or equal to 40% by weight, preferably at least 45% by weight, relative to the total weight of the carbon atoms of the fat composition. fat.
- the carbon content of biological origin also called biogenic carbon content
- biogenic carbon content can be determined according to the ASTM D6866 method.
- the grease composition according to the invention can be prepared according to any process known to those skilled in the art for the preparation of grease.
- a preformed thickener is used during the preparation process.
- the grease preparation process includes a step of bringing the calcium carbonate thickener into contact with the base oil and a heating step until the soap melts (and the grease is formed). . If additives are present, they can be added before or after cooling. After cooling, the fat composition is generally homogenized by grinding.
- the invention also relates to the use of the grease composition in off-road (in French “non-road”), agricultural, wind machines, such as “off-road” vehicles, construction machinery, machines. agricultural and wind turbines.
- the grease composition according to the invention is used to lubricate at least one component of an off-road, agricultural or wind turbine machine, preferably chosen from construction machinery, agricultural machines and wind turbines.
- the invention also relates to a method for lubricating at least one member of an off-road, agricultural or wind turbine machine, preferably chosen from construction machinery, agricultural machines and wind turbines, said method comprising bringing into contact of the organ with a fat according to the invention.
- the grease according to the invention can be used in bearings (ball needle roller), rolling and sliding bearings, open gears, metal cables and chain drives, and more generally applications not not having a sealing system.
- Fats were prepared according to the following protocol: The fats used in the examples are prepared in the following way: the thickener and the calcium carbonate are placed in its base oil and heated until the soap melts. . After cooling, the additives are then added in different proportions and the fat composition is homogenized with a grinder.
- the base oil(s) comprises a blend of two ester type oils.
- the base oil(s) have a biodegradability measured according to the OECD 301B standard at 28 days of 70% and 75%.
- the thickener is 12-hydroxy lithium stearate. It has a biodegradability of 97% after 28 days.
- CaCO3 (1) is a calcium carbonate having a D50 particle size of 2.14 pm and a D90 particle size of 8.04 pm.
- CaCO3(2) is a calcium carbonate having a D50 particle size of 7.08 pm and a D90 particle size of 14.9 pm.
- Anti-wear is an anti-wear comprising a mixture of amine phosphates.
- the additive package includes a sulfur ester extreme pressure additive, an anti-oxidant additive and a metal passivator additive.
- the CI4 composition according to the invention has a biodegradability at 28 days of 67.26%, calculated from the biodegradability of the base oils and the thickener.
- the particle size of the calcium carbonate used in the examples was measured by a laser diffraction method well known to those skilled in the art.
- macroscopic agglomerates are present (for example sizes greater than 400 pm) then mechanical sieving can be implemented with two different sieves (400 pm and 800 pm) in order to reduce macroscopic agglomerates.
- drying the sample at 100°C can be carried out to further reduce the quantity of macroscopic agglomerates.
- the CI4 grease composition does not include anti-wear, it has better anti-wear properties than the CCI and CC2 grease compositions including an anti-wear additive.
- the grease composition CI4 comprises a calcium carbonate having the claimed particle size and has better anti-wear properties than the composition CC3 comprising a calcium carbonate having another particle size.
- the CCI and CI4 compositions were tested for their stickiness, by a water spray off test.
- the viscosity at 40°C of the compositions is 680 cSt, measured according to the ASTM D445 standard.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2203079A FR3134112B1 (fr) | 2022-04-05 | 2022-04-05 | Graisses lubrifiantes biodégradables. |
| PCT/EP2023/058732 WO2023194332A1 (fr) | 2022-04-05 | 2023-04-04 | Graisses lubrifiantes biodégradables |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4504882A1 true EP4504882A1 (fr) | 2025-02-12 |
| EP4504882B1 EP4504882B1 (fr) | 2025-12-31 |
Family
ID=81851364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23717123.6A Active EP4504882B1 (fr) | 2022-04-05 | 2023-04-04 | Graisses lubrifiantes biodégradables |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250236806A1 (fr) |
| EP (1) | EP4504882B1 (fr) |
| CN (1) | CN119278251A (fr) |
| CA (1) | CA3255191A1 (fr) |
| FR (1) | FR3134112B1 (fr) |
| WO (1) | WO2023194332A1 (fr) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4344854A (en) | 1975-03-21 | 1982-08-17 | The Lubrizol Corporation | Sulfurized compositions |
| US5135670A (en) | 1990-06-22 | 1992-08-04 | Mobil Oil Corporation | Sulfurized olefin extreme pressure/antiwear additives and compositions thereof |
| FR2984350B1 (fr) * | 2011-12-16 | 2015-02-27 | Total Raffinage Marketing | Composition de graisse |
| RU2717349C2 (ru) * | 2015-02-06 | 2020-03-23 | Шелл Интернэшнл Рисерч Маатсхаппий Б.В. | Смазочная композиция |
| DE102018008362A1 (de) * | 2018-07-09 | 2020-01-09 | Klüber Lubrication München Se & Co. Kg | Umweltverträgliches Schmierfett für Stahlseile |
-
2022
- 2022-04-05 FR FR2203079A patent/FR3134112B1/fr active Active
-
2023
- 2023-04-04 WO PCT/EP2023/058732 patent/WO2023194332A1/fr not_active Ceased
- 2023-04-04 US US18/853,689 patent/US20250236806A1/en active Pending
- 2023-04-04 EP EP23717123.6A patent/EP4504882B1/fr active Active
- 2023-04-04 CA CA3255191A patent/CA3255191A1/fr active Pending
- 2023-04-04 CN CN202380032090.XA patent/CN119278251A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023194332A1 (fr) | 2023-10-12 |
| EP4504882B1 (fr) | 2025-12-31 |
| CN119278251A (zh) | 2025-01-07 |
| US20250236806A1 (en) | 2025-07-24 |
| FR3134112A1 (fr) | 2023-10-06 |
| FR3134112B1 (fr) | 2024-04-12 |
| CA3255191A1 (fr) | 2023-10-12 |
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