EP4079830A1 - Biologisch abbaubare schmiermittelzusammensetzung - Google Patents

Biologisch abbaubare schmiermittelzusammensetzung Download PDF

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Publication number
EP4079830A1
EP4079830A1 EP21382335.4A EP21382335A EP4079830A1 EP 4079830 A1 EP4079830 A1 EP 4079830A1 EP 21382335 A EP21382335 A EP 21382335A EP 4079830 A1 EP4079830 A1 EP 4079830A1
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Prior art keywords
lubricant composition
acid
additive
comprised
composition according
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EP21382335.4A
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English (en)
French (fr)
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Guillem Capellades Puig
Laura Batlle Boix
Elisabet Benedicto Bardolet
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Marteen Sports World SL
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Marteen Sports World SL
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Priority to EP21382335.4A priority Critical patent/EP4079830A1/de
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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
    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • C10M111/02—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a non-macromolecular organic compound
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • C10M2207/2835—Esters of polyhydroxy compounds 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/40—Fatty vegetable or animal oils
    • C10M2207/404—Fatty vegetable or animal oils obtained from genetically modified species
    • C10M2207/4045—Fatty vegetable or animal oils obtained from genetically modified species 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
    • C10M2219/024—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of esters, e.g. fats
    • 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
    • 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
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
    • C10M2219/066—Thiocarbamic type compounds
    • 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
    • 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
    • C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
    • 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
    • C10N2030/26—Waterproofing or water resistance
    • 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
    • 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
    • C10N2040/38—Conveyors or chain belts

Definitions

  • the present invention relates to the field of lubricant compositions, and more particularly to biolubricants.
  • Lubricants are widely used for many applications, either industrial, commercial or personal, typically for whatever device whose functioning involves some friction between metallic surfaces. Among the common functions of lubricants are to decrease friction, protect against corrosion and wear or to remove heat, for example. Lubricants are also used as a media for transmitting energy, as hydraulic fluids.
  • lubricant formulations are based on oils and greases and, traditionally, during many decades, lubricant research and development has been focused on petroleum-based oils.
  • petroleum-based lubricants are considered a threat due to their high toxicity and low biodegradability.
  • biolubricants or bio-based lubricants are frequently referred to as biolubricants or bio-based lubricants.
  • Vegetable oils are commonly used as biolubricants, including oils derived from avocado, rapeseed, olive, palm, peanut, safflower, sesame, soybean or sunflower, among many other. They have the advantage of having excellent biodegradability and being readily available from renewable sources. Furthermore, in general, they show good lubricity and wear properties with high viscosity index and flash point. However, lubricants based on vegetable oils also have drawbacks, for example, lack of sufficient oxidative stability, limited temperature range, unpleasant smell, poor compatibility with paints and sealants and flushing propensity because of their low viscosity, for example ( Reeves et al., A review on the science and technology of natural and synthetic biolubricants, J. Bio.
  • esters There are many choices of acids and alcohols available for the production of synthetic esters, including monovalent alcohols and polyols such as neopentyl glycol, pentaerythritol, trimethylolpropane, trimethyolhexane or trimethylolethane, among many others; suitable organic acids include C 5 -C 18 monoacids and diacids such as adipic acid, azelaic acid, sebacic acid or dodecanedioic acid, for example, among others.
  • These synthetic esters show low toxicity and excellent biodegradability. Furthermore, they often show improved performance compared to natural oils due to a more uniform molecular structure and the use of different alcohols (Reeves et al., op.cit. ).
  • Lubricant compositions frequently include also some minor additives to improve the properties of base oil.
  • Typical additives are antioxidants, corrosion inhibitors, anti-wear additives or pour point depressants, for example. These additives included in biolubricants should also not be harmful for the environment.
  • biolubricant formulations with better lubricant performance, which are substantially biodegradable, based on renewable sources, that are non-toxic and suitable for specific applications.
  • the object of the present invention is a lubricant composition.
  • Another aspect of the invention is the use of the composition for the lubrication of mechanical devices.
  • Figure 1 shows the results of the anti-wear performance test disclosed in Example 3.1.
  • the anti-wear performance is represented by the calculated Brugger value (in N/mm 2 ).
  • the samples assayed are the compositions of the invention disclosed in Examples 1 and 2 and two commercial lubricant compositions as comparators (Comp-A and Comp-B).
  • the object of the present invention is a lubricant composition
  • a lubricant composition comprising:
  • the authors of the present invention have surprisingly found that the specific combination of a natural vegetal oil, namely, castor oil, and a triester derived from trimethylolpropane with C8/C10 fatty acids provides excellent lubricant properties.
  • the lubricant composition is environmentally friendly as it is biodegradable and greatly based on renewable sources.
  • the lubricant composition consists of the components a) and b), as disclosed above; in this case, therefore, the sum of the percentages of a) and b) amounts to 100.
  • biolubricant is used to refer to the lubricant composition of the present invention. This term denotes that the composition is composed of biodegradable substances, mainly obtained from renewable sources (as castor oil) and which are considered not harmful to the environment.
  • the base oil amounts to between 90 and 99.5 % of the total weight of the lubricant composition.
  • the base oil amounts to about 94-99 wt% of the composition, and more preferably to about 96-98 wt% of the composition.
  • This base oil consists of a mixture of castor oil and a triester of trimethylolpropane with octanoic acid and/or decanoic acid
  • Castor oil is a vegetable oil obtained from the seeds of the castor plant ( Ricinus communis ). It is a mixture of triesters of glycerin with fatty acids, mostly with ricinoleic acid, which amounts about 89% of total fatty acids.
  • Ricinoleic acid also called ( R )-12-hydroxy-9- cis -octadecenoic acid, is a linear C 18 fatty acid with a cis-double bond between carbons 9 and 10 and a hydroxy group located at carbon 12.
  • fatty acids are linoleic acid, oleic acid, stearic acid, palmitic acid, dihydroxystearic acid, linolenic acid and eicosanoic acid ( Ogunniyi D.S., Castor oil: A vital industrial raw material, Bioresource Technol., 2006, 1086-1091 ). All possible grades of castor oil, i.e. different variations in the fatty acid content, are included within the scope of the invention.
  • Castor oil is widely available from many commercial sources.
  • the percentage of castor oil in the base oil is generally comprised between 70 and 90 wt%, preferably between 75 and 88 wt% and more preferably comprised between 78 and 85 wt%, referred to the total weight of the base oil.
  • Triester of trimethylolpropane with octanoic acid and decanoic acid Triester of trimethylolpropane with octanoic acid and decanoic acid
  • the second component of the base oil in the lubricant composition is a triester ester of trimethylolpropane (TMP) with octanoic acid (C8 carboxylic acid: also known as caprylic acid) and decanoic acid (C10 carboxylic acid: also known as capric acid).
  • TMP trimethylolpropane
  • the percentage of this triester of trimethylolpropane in the base oil is generally comprised between 10 and 30 wt%, preferably comprised between 12 and 25 wt% and more preferably is comprised between 15 and 22 wt%, referred to the total weight of the base oil.
  • This triester is a mixed ester of trimethylolpropane with a mixture of octanoic acid and decanoic acid, i.e., it has the following formula: wherein R is a C 7 or a Cg linear hydrocarbon chain.
  • octanoic and decanoic acids in the triester may be suitable.
  • the percentage of octanoic acid is comprised between 30% and 80%, preferably comprised between 40% and 70% and more preferably comprised between 50% and 60%, referred to the total amount of fatty acids.
  • the percentage of decanoic acid is generally comprised between 20% and 70%, preferably comprised between 30% and 60%, more preferably comprised between 40% and 50%, referred to the total amount of fatty acids.
  • the TMP triester is typically formed by a mixture of different triesters, namely, a triester of TMP with octanoic acid only (TMP-3C8), a mixed triester with 2 mols of octanoic acid and 1 mol of decanoic acid (TMP-2C8-1C10), a mixed triester with 1 mol of octanoic acid and 2 mols of decanoic acid (TMP-1C8-2C10) and a triester with decanoic acid only (TMP-3C10). Any different proportions of said four possible triesters are suitable and are included within the scope of the invention.
  • the molar proportion of the triester TMP-3C8 is in the range of about 15-25%
  • the molar proportion of the triester TMP-2C8-1C10 is in the range of about 40-50%
  • the molar proportion of the triester TMP-1C8-2C10 is in the range of about 25-35%
  • the molar proportion of the triester TMP-3C10 is in the range of about 2-10%.
  • the triester of trimethylolpropane with octanoic acid and decanoic acid can be prepared by common synthetic methods, well-known in the art, by simple esterification reaction of the trimethylolpropane alcohol with a suitable mixture of octanoic and decanoic acids, usually in the presence of a catalyst, for example, a tin compound.
  • triesters of trimethylolpropane with octanoic acid and decanoic acid are also commercially available, for example, the products WAGLINOL ® 3/13480 of the company IQL (Industrial Qu ⁇ mica Lasam), or the product ZELEC ® 887 of the company Stepan, among others.
  • the lubricant composition of the invention comprises from 0.5 to 10 wt% of an additive.
  • the additive amounts to about 1-6 wt% of the composition, and more preferably to about 2-4 wt% of the composition.
  • the additive may be selected from an antioxidant, a corrosion inhibitor, an anti-wear additive, a viscosity improver, a pour point depressant and mixtures thereof.
  • antioxidant additives for example, is to delay or prevent the oxidation process by protecting the lubricant from oxidative degradation.
  • Suitable antioxidant additives may be of natural origin, such as tocopherols, esters of gallic acid, citric acid, citric acid derivatives, L-ascorbic acid or ascorbyl palmitate, among others.
  • Antioxidants may be also synthetic, for example, bis(disubstituted dithiocarbamates), particularly methylene bis(dialkyldithiocarbamates); dithiocarbamate esters; sterically hindered phenols, such as butylated hydroxytoluene (BHT), 2,6-di- tert -butylphenol, 2,6-di- tert- butyl-p-cresol, 6,6'-di- tert -butyl-4,4'-butylidenedi-m-cresol, mono- tert- butylhydroquinone, 4,4'-methylenebis(2,6-di- tert -butylphenol), octadecyl 3-(3',5'-di- tert- butyl-4'-hydroxyphenyl)propionate, or thiodiethylene bis[3-(3,5-di- tert -butyl-4-hydroxyphen
  • Preferred antioxidants are methylene bis(dialkyldithiocarbamates), butylated hydroxytoluene, 2,6-di-tert-butylphenol, 2,6-di-tert-butyl-p-cresol, mono-tert-butylhydroquinone, 4,4'-methylenebis(2,6-di-tert-butylphenol) and octadecyl 3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate; more preferred antioxidants are methylene bis(dialkyldithiocarbamates), 4,4'-methylenebis(2,6-di- tert -butylphenol) and octadecyl 3-(3',5'-di- tert- butyl-4'-hydroxyphenyl)propionate.
  • antioxidant additive When there is an antioxidant additive it is generally in an amount comprised between 0.1 wt% and 6 wt%, preferably comprised between 0.5 wt% and 5 wt%, more preferably comprised between 0.75 and 3 wt%, relative to the total weight of the lubricant composition.
  • corrosion inhibitors The purpose of corrosion inhibitors is to avoid rust in the metallic components in contact with the lubricant composition.
  • There are many substances disclosed in the art which can be used as corrosion inhibitors see for example Z. Tang, A review of corrosion inhibitors for rust preventive fluids, Curr. Opin. Solid State Mater. Sci., 2019, 23, 100759 or in the book chapter M.T. Costello, Corrosion Inhibitors and Rust Preventives, in: Lubricant Additives. Chemistry and Applications, Second Edition, L.R. Rudnick Ed., CRC Press, 2009, Chapter 17, 421-444 ).
  • corrosion inhibitors are, for example, dicarboxylates, in particular, succinic acid derivatives; alkyl amines; amino acids; sulfonic acid esters; derivatives of some nitrogen containing heterocycles, for example, imidazoline, thiazole, thiadiazole or benzothiazole, such as dimercaptothiadiazoles or mercaptobenzothiazole derivatives; among many others.
  • dicarboxylates in particular, succinic acid derivatives; alkyl amines; amino acids; sulfonic acid esters; derivatives of some nitrogen containing heterocycles, for example, imidazoline, thiazole, thiadiazole or benzothiazole, such as dimercaptothiadiazoles or mercaptobenzothiazole derivatives; among many others.
  • a preferred type of corrosion inhibitor is a succinic acid derivative.
  • Another preferred type of corrosion inhibitor is a sulfonic acid ester prepared by reaction of benzenesulfonic acids (mono-, di- or trialkyl benzenesulfonic acids) with a methyl ester of an epoxidized unsaturated fatty acid, as described in the European patent application EP-A-0557839 .
  • a corrosion inhibitor when there is a corrosion inhibitor in the formulation, it is generally in an amount comprised between 0.1 wt% and 4 wt%, preferably comprised between 0.2 and 2 wt%, and more preferably comprised between 0.5 wt% and 1.5 wt%, relative to the total weight of the lubricant composition.
  • anti-wear additives The purpose of anti-wear additives is to protect materials against wear. There are also many substances disclosed in the art which can be used as anti-wear additives (for example, as disclosed in L.O. Farng, Ashless Anti-wear and Extreme-Pressure Additives, in: Lubricant Additives. Chemistry and Applications, Second Edition, op. cit., Chapter 8, 213-249 ).
  • Some typical anti-wear additives are, for example, triesters of phosphoric acid or thiophosphoric acid, which may be alkyl esters, aryl esters, or mixed alkyl aryl esters, for example, tricresyl phosphates or trixylenyl phosphates or triphenyl phosphorothionate (TPPT); amine salts of acid phosphoric acid esters; dithiophosphates; dithiocarbamates, such as methylene bis(dialkyldithiocarbamates); or sulfurized fatty acid esters; among others.
  • triesters of phosphoric acid or thiophosphoric acid which may be alkyl esters, aryl esters, or mixed alkyl aryl esters, for example, tricresyl phosphates or trixylenyl phosphates or triphenyl phosphorothionate (TPPT); amine salts of acid phosphoric acid esters; dithiophosphates;
  • Some preferred anti-wear additives are methylene bis(dialkyldithiocarbamates) and sulfurized fatty acid esters.
  • an anti-wear additive in the formulation, it is generally in an amount comprised between 0.1 wt% and 6 wt%, preferably comprised between 0.5 wt% and 5 wt%, relative to the total weight of the lubricant composition.
  • the viscosity improvers are usually thickeners, used to adjust the viscosity of the composition.
  • Typical viscosity improvers are, for example, esters of polymethacrylic acid with hydrocarbon side chains of different lengths (see, for example, B.G. Kinker, Polymethacrylate viscosity modifiers and pour point depressants, in: Lubricant Additives. Chemistry and Applications, Second Edition, op. cit., Chapter 11, 315-337 ).
  • viscosity improver When there is a viscosity improver, it is in an amount comprised between 0.1 wt% and 5 wt%, relative to the total weight of the composition.
  • Pour point depressants are polymeric molecules that can be added to improve the flow properties of the biolubricant.
  • Examples of pour point depressants are acrylates, alkylated styrenes, alpha olefins, ethylene/vinyl acetates, methacrylates, styrene/maleic anhydrides, and vinyl acetate/fumarates.
  • the base oil used had excellent lubricant properties which made it not necessary to use many additives.
  • the viscosity and pour point of the base oil are optimal so, in general, viscosity improvers or pour point depressants are not necessary.
  • the additive is selected from an antioxidant, a corrosion inhibitor, an anti-wear additive and mixtures thereof.
  • the additive consists of the above ingredients.
  • the anti-wear additive is selected from methylene bis(dialkyldithiocarbamates) and sulfurized fatty acid esters.
  • the antioxidant additive is selected from methylene bis(dialkyldithiocarbamates), 4,4'-methylenebis(2,6-di- tert -butylphenol) and octadecyl 3-(3',5'-di- tert -butyl-4'-hydroxyphenyl)propionate.
  • the corrosion inhibitor is selected from succinic acid derivatives and sulfonic acid esters.
  • additives may advantageously perform more than one function.
  • anti-wear additive antioxidant, corrosion inhibitor, viscosity improver or pour point depressant are meant to include also those substances having additional functions.
  • antioxidant/antioxidant additive For example, some additives simultaneously perform an antioxidant and anti-wear function (anti-wear/antioxidant additive).
  • the additive comprises:
  • the additive consists of the above ingredients.
  • the anti-wear/antioxidant additive is a methylene bis(dialkyldithiocarbamate).
  • This type of additives is known to provide antioxidant and anti-wear properties.
  • One particularly preferred additive is methylene bis(dibutyldithiocarbamate).
  • the corrosion inhibitor is selected from succinic acid derivatives and sulfonic acid esters.
  • the lubricant composition can be prepared by mixing all the components, typically, by first mixing the two components of the base oil, i.e., castor oil and the triester of trimethylolpropane with octanoic acid and decanoic acid, to obtain a homogeneous mixture, and then adding the additives under stirring. Other mixing order of the components is also suitable.
  • Another aspect of the invention is the use of the lubricant composition of the invention for the lubrication of mechanical devices.
  • the biolubricant composition of the present invention can be used for any lubricating application, either for industrial machinery or for any other purpose. As shown in the tests performed in Example 3, the lubricant composition of the present invention shows excellent performance in anti-wear, water repellency, rust protection, pain compatibility and dirt repelling tests.
  • the anti-wear properties of the lubricant of the present invention are optimal.
  • the lubricant compositions according to the present invention show the best results in the anti-wear test.
  • the lubricant composition of the present invention shows also excellent water-repellent properties. This characteristic is important to ensure the durability of the lubricated parts, because the presence of water can have harmful effects on machine components, and also to ensure the stability of the lubricant composition itself, as the presence of water can also lead to lubricant oxidation, hydrolysis or some undesired reaction of the components.
  • biolubricant composition of the present invention make it particularly suitable, in particular, for chain lubrication of bicycles.
  • the capacity to repel water is particularly important for lubricants for the bicycle industry, in order to prevent chain rusting and also for their use in extreme weather conditions.
  • the dirt-repelling effect, along with the anti-wear efficiency and the durability of the lubricant itself, may be relevant for lubricants to be used for bicycle chains in order to increase chain lifetime.
  • Another aspect of the invention is, therefore, the use of the lubricant composition of the invention for the lubrication of bicycle chains. It includes typically mechanical bicycles and electric bicycles (e-bikes), and also motorcycles.
  • lubricant composition of the present invention relate to its rust protection performance and paint compatibility, as shown in Examples 3.3 and 3.4, which may be particularly relevant also for the lubrication of bike chains.
  • the lubricant composition is environmentally friendly as it is composed of substantially biodegradable components, which are nontoxic to the environment, and mainly based on renewable sources. It makes also the composition of the invention particularly suited for the lubrication of bicycle chains, as part of lubricant may be released to the environment during its use.
  • a lubricant composition according to the invention was prepared with the ingredients listed in_the following table: Ingredients Function Amount (wt%) Castor oil Base oil 78.5 Triester of trimethylolpropane with octanoic acid and decanoic acid Base oil 18.5 Methylenebis(dibutyldithiocarbamate) Anti-wear / antioxidant additive 2 Alkylbenzenesulfonic acid ester with epoxidized rapeseed oil fatty acids Corrosion inhibitor 1
  • the triester of trimethylolpropane with octanoic acid and decanoic acid was a mixture of triesters with the approximate molar proportion (TMP-3C8) : (TMP-2C8-1C10) : (TMP-1C8-2C10) : (TMP-3C10) of 22:44:29:5.
  • the two base oil components were first mixed and the additives were next added and thoroughly mixed.
  • the formulation was a viscous oil with no odour.
  • a lubricant composition according to the invention was prepared with the ingredients listed in the following table: Ingredients Function Amount (wt%) Castor oil Base oil 79 Triester of trimethylolpropane with octanoic acid and decanoic acid Base oil 19 Sulfurized fatty acids methyl esters from vegetable-oil Anti-wear additive 2
  • the two base oil components were first mixed and the additives were next added and thoroughly mixed.
  • the formulation was a viscous oil with no odour.
  • the comparative formulations Comp-A and Comp-B were commercial lubricant compositions.
  • the objective of this assay was to assess the capacity of the lubricant composition to repel water.
  • a steel panel was placed in the oven at 160 oC for 5 minutes. Then, the panel was removed from the oven and 1 ml of each tested sample was placed on it. The appearance of bubbles was assessed and each sample was rated according to the following scale:
  • the same water-repellent effect was found for both water content tested, i.e. 1% and 3%.
  • the lubricant composition of the invention provided good water-repellent effect.
  • the procedure comprised the following steps:
  • one aluminium (AA 6014/3) panel was first coated and then two paint layers were applied (Kilate AcriTec Satinated water-based Paint from AkzoNobel), and it was left for about 1 hour to dry. 1 ml of lubricant was applied on the painted panel surface using a dropping pipette and the appearance was observed after 90 min and after 48 h.
  • a dirt repelling test was performed according to the following steps:

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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)
  • Lubricants (AREA)
EP21382335.4A 2021-04-19 2021-04-19 Biologisch abbaubare schmiermittelzusammensetzung Pending EP4079830A1 (de)

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CN116574556A (zh) * 2023-06-01 2023-08-11 潍坊凯利来生物科技有限公司 一种自行车链条润滑油及制备方法

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EP0557839A1 (de) 1992-02-27 1993-09-01 RHEIN CHEMIE RHEINAU GmbH Nieder- und hochmolekulare Korrosionsschutzadditive auf Basis von Epoxiden
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EP0557839A1 (de) 1992-02-27 1993-09-01 RHEIN CHEMIE RHEINAU GmbH Nieder- und hochmolekulare Korrosionsschutzadditive auf Basis von Epoxiden
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116574556A (zh) * 2023-06-01 2023-08-11 潍坊凯利来生物科技有限公司 一种自行车链条润滑油及制备方法
CN116574556B (zh) * 2023-06-01 2024-04-30 潍坊凯利来生物科技有限公司 一种自行车链条润滑油及制备方法

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