EP4499789A1 - Verwendung einer schmierstoffzusammensetzung zum schmieren von arbeitsgeräten - Google Patents
Verwendung einer schmierstoffzusammensetzung zum schmieren von arbeitsgerätenInfo
- Publication number
- EP4499789A1 EP4499789A1 EP22817162.5A EP22817162A EP4499789A1 EP 4499789 A1 EP4499789 A1 EP 4499789A1 EP 22817162 A EP22817162 A EP 22817162A EP 4499789 A1 EP4499789 A1 EP 4499789A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- lubricant composition
- acid
- use according
- polyalphaolefin
- 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.)
- Pending
Links
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- 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
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- 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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- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
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- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
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- 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
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- C10N2010/06—Groups 3 or 13
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- 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
- C10N2020/02—Viscosity; Viscosity index
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- 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
- C10N2020/04—Molecular weight; Molecular weight distribution
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- 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
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- 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
- C10N2030/08—Resistance to extreme temperature
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- 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
- C10N2030/36—Seal compatibility, e.g. with rubber
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- 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
- C10N2030/40—Low content or no content compositions
- C10N2030/44—Boron free or low content boron compositions
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/62—Food grade properties
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- 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
- C10N2030/68—Shear stability
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- 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
- C10N2030/74—Noack Volatility
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/02—Bearings
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N2040/046—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for traction drives
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/06—Instruments or other precision apparatus, e.g. damping fluids
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- 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
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/50—Medical uses
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- 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
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2070/00—Specific manufacturing methods for lubricant compositions
Definitions
- the invention relates to the use of a lubricant composition for lubricating work equipment that is used for processing, in particular for packaging, manufacturing, portioning, order picking, assembly, storage, extraction and/or promotion of food, luxury foods, cosmetics, pharmaceuticals and/or animal feed.
- lubricants for lubricating work equipment for processing food, beverages, cosmetics, pharmaceuticals and/or animal feed with regard to their environmental compatibility and toxicity.
- a lubricant should be food-safe if the lubricant can come into direct or indirect contact with cosmetics, food and beverages.
- the important areas of application in the food industry include chains in ovens and other high-temperature applications, as well as transport hangers, especially trolleys and their bearings. But also in others Applications such as packaging devices, for example cigarettes, require food-grade lubricants.
- Food-safe lubricants are subject to legal regulations, such as certification according to NSF/H1 or NSF/H2.
- the classification “H1” can be achieved by lubricants that are in "incidental food contact", i.e. in occasional, technically unavoidable contact with food. However, intentional or permanent contact can also be ruled out when using “H1” lubricants.
- An “H2” classification can be achieved by lubricants that are non-toxic and non-carcinogenic. When using “H2” lubricants, any contact with the food must be excluded.
- Aluminum complex soaps are often used as thickeners in the well-known food-safe lubricants because they are suitable for "H1".
- Aluminum complex soaps as thickeners for lubricating grease compositions have long been known and are described in many literatures, for example in JL Dreher, TH Koundakijan and CF "Manufacture and Properties of Aluminum Complex Greases", NLGI Spokesman, 107-113, 1965; HW Kruschwitz “The Development of Formulations for Aluminum Complex Thickener Systems” NLGI Spokesman, 51 -59, 1976; HW Kruschwitz “The Manufacture and Uses of Aluminum Complex Greases” NLGI National Meeting Preprints 1985.
- lubricants containing aluminum complex soaps have unsatisfactory technical performance for some applications in food processing.
- the food-grade lubricants containing aluminum complex soaps used to date do not have the desired wear resistance for some applications in food processing and/or have poor resistance to seals. It would therefore be desirable to obtain a lubricant that can be formulated to suit “H1” and that does not have these disadvantages.
- CN 107955694 A describes a lubricating grease for food machinery, which consists of, based on weight, 250-350 parts of base oil, 50-60 parts of fatty acid, 10-20 parts of calcium hydroxide, 5-10 parts of hydroxide lithium, 1-3 parts of inorganic acid, 3 -5 parts antioxidant and 8-12 parts rust inhibitor, the inorganic acid being boric acid.
- the grease should have a high dropping point of up to 260 °C and good corrosion resistance.
- the disadvantage of this grease is the high proportion (1-3% by weight) of boric acid, as it is harmful to health.
- the CN 107987943 A describes a lubricant for
- Food machinery containing 30 to 40 parts by weight of palm oil, 20 to 30 parts of rice bran oil, 10 to 20 parts of sulphur Lard, 5 to 10 parts modified soybean oil, 4 to 8 parts catechin gallate, 3 to 6 parts sodium lauryl sulfonate, 3 to 6 parts propylene glycol fatty acid ester, 2 to 4 parts soybean phospholipids, 2 to 5 parts monoalkyl ether phosphate triethanolamine salt, 0.5 to 1 part thiobisphenol, 2 up to 4 parts lithium 12-hydroxystearate, 1 to 2 parts zinc stearate, 1.2 to 1.5 parts nanomolybdenum disulfide, 0.3 to 0.5 parts zinc dialkyldithiophosphate, 1 to 3 parts dibutylhydroxytoluene, 15 to 25 parts water.
- lubricant has an intense smell of sulfur due to the use of raw materials containing sulfur.
- lubricants that contain animal components, such as lard are not well suited for the food sector and cannot even be used for kosher foods.
- the use of zinc stearate is also unacceptable from a health perspective.
- DE 102005013266 A1 describes the use of a lubricating grease composition consisting of at least 50% by weight of a base oil selected from the group of hydrocarbons, polyalkylene glycols, silicone oils, esters or perfluorinated polyethers; up to 20% by weight of at least one thickener selected from the group of soap thickeners based on aluminum, calcium, lithium, barium or sodium compounds; polyurea thickeners; polymeric thickeners or inorganic thickeners and/or up to 45% by weight of at least one solid lubricant from the group of polymers; the silicates; the Russian; the graphite or based on metal sulfides, phosphates, oxides or hydroxides and up to 20% by weight of at least one preservative selected from the group of quaternary ammonium salts;
- Sorbic acid, formic acid or 4-hydroxy-benzoic acid ester and other additives as lubricants for beer bottling systems are included.
- a lubricating grease composition with the following composition is described as particularly suitable:
- grease compositions based on aluminum thickeners show unsatisfactory mechanical properties for some applications.
- layered silicates can usually be used to increase the consistency used can lead to increased wear in some applications.
- EP 3375850 A1 describes a food-compatible high-temperature fat comprising the following components: a) 91.9 to 30% by weight of at least one oil, selected from the group consisting of a mixture of trimellitic acid tri(iso-C10) ester (1) and trimellitic acid tri (iso-C13 ) esters (2), the mixing ratio of (1) to (2) being 99:1 to 1:99, alkyl aromatics, estolides; b) 6 to 45% by weight of a polymer selected from the group consisting of a hydrogenated, fully hydrogenated polyisobutylene or a mixture of hydrogenated or fully hydrogenated polyisobutylene; c) 0.1 to 5% by weight of additives individually or in combination, selected from the group consisting of corrosion protection additives, antioxidants, wear protection additives, UV stabilizers, inorganic or organic solid lubricants and d) 2 to 20% by weight of thickeners.
- urea As thickeners, urea, Al complex soaps, metal simple soaps of the elements of the first and second main groups of the periodic table, metal complex soaps of the elements of the first and second main groups of the periodic table, bentonites, sulfonates, silicates, aerosil, polyimides, PTFE or a mixture of the the aforementioned thickeners can be used.
- the component can a) as a further food-compatible oil, a compound selected from the group consisting of mineral oil, aliphatic Carboxylic acid and dicarboxylic acid esters, fatty acid triglycerides and polyalphaolefins.
- the object of the present invention is to provide a lubricant composition that can be used for lubricating work equipment that is used for processing, in particular for packaging, manufacturing, portioning, order picking, packaging, storage, extraction and/or promotion of food, luxury foods, cosmetics , pharmaceuticals and/or animal feed, and which at least partially eliminates the above-mentioned disadvantages.
- the lubricant composition “H1” should be suitably formulated can be used and still have good wear resistance and high resistance to elastomeric seals.
- the lubricant composition is said to have improved low-temperature behavior and temperature stability compared to lubricant compositions containing aluminum complex soaps as thickeners and to demonstrate improved technical performance for at least some food processing applications.
- a lubricant composition comprising the following components: a) 72% by weight to 95% by weight of polyalphaolefin, b) 5% by weight to 28% by weight of lithium soap, in each case based on the total weight of the lubricant composition, for lubricating Equipment used for processing, in particular for packaging, manufacturing, portioning, order picking, assembly, storage, extraction and/or promotion, of food, luxury foods, cosmetics, pharmaceuticals and/or animal feed, whereby the metallocene-catalyzed polyalphaolefin content is at least 10% by weight .%, more preferably from 10% by weight to 95% by weight, based in each case on the total weight of the lubricant composition, and/or the content of acid-catalyzed polyalphaolefin is at least 10% by weight, more preferably from 10% by weight to 95% by weight, in each case based on the total weight of the lubricant composition.
- the lubricant composition according to the invention is suitable for NSF/H1.
- NSF/H1 compatible raw materials are approved according to the rules of the National Sanitation Foundation (Code of Federal Regulations, Title 21, Volume 3, Revised as of April 1, 2020, CITE: 21 CFR178.3570). The permitted raw materials can be published or treated confidentially. This makes the composition ideal for lubricating work equipment in the areas mentioned above.
- the lubricant composition has good wear resistance and high resistance to elastomeric seals. In addition, it has improved technical performance compared to lubricant compositions containing aluminum complex soaps as thickeners for various food processing applications. In particular, the lubricant composition shows the following advantages compared to these lubricant compositions with comparable base oil viscosity (40 °C): • up to -50 °C flow pressure
- Li soap thickeners compared to Al complex soaps are that their thickening effect is stronger and therefore stronger lubricating greases can be produced without Co thickeners (e.g. bentonite).
- Al complex soap fats have a regulatory limit of a maximum of 10% by weight of pure thickener for the H1 range. Significantly firmer consistencies can be achieved with Li soaps than with Al complex fats.
- the lubricant composition comprises less than 0.1% by weight of boric acid and boric acid derivatives, each based on the total weight of the lubricant composition.
- Boric acid derivatives are compounds produced by chemical
- Reaction of boric acid can be obtained and in which a central boron atom is coordinated with three or four oxygen atoms.
- Boric acid derivatives have another atom or group of atoms instead of one or more hydrogen atoms.
- boric acid derivatives are typically understood to mean compounds that are obtained by chemically reacting boric acid with bases contained in the lubricant composition, in particular with metal carbonates (lithium soaps) or metal hydroxides used as thickeners, i.e. metal borates and boric acid esters.
- the lubricant composition contains less than 0.1% by weight of boric acid, calcium borate and lithium borate, based on the total weight of the lubricant composition.
- the lubricant composition contains 72% by weight to 95% by weight of polyalphaolefin (PAO).
- PAO polyalphaolefin
- Particularly preferred polyalphaolefins are NSF/H1-compatible polyalphaolefins.
- the advantage of polyalphaolefins is their good sealing compatibility with polar sealing materials, for example NBR, HNBR and ACM. They also enable improved low-temperature properties compared to white oils and mineral oils.
- Polyalphaolefins can be produced from an alpha-olefin or from mixtures of alpha-olefins, for example via acid catalysis or metallocene catalysis.
- the polyalphaolefin preferably comprises acid-catalyzed polyalphaolefin, metallocene-catalyzed polyalphaolefin and/or mixtures thereof.
- Metallocene-catalyzed PAOs lead to more ordered structures because rearrangement during the polymer reaction can be reduced.
- Preferred commercial products for mPAO's are Spectrasyn Elite 65®, Spectrasyn Elite 150®, Spectrasyn Elite 300®, Durasyn 1801®, Durasyn 174 I®, Synfluid mPAO 100 cst.®.
- Acid-catalyzed PAOs generally provide higher polydispersity and more isomerization occurs.
- Preferred commercial products are Synfluid PAO 4®, Spectrasyn 4®, Durasyn 164®, Spectrasyn 40®, Synton PAO 40®.
- the polyalphaolefin comprises mixtures of oligomers and/or polymers, as is common in commercially available products.
- Polyalphaolefins suitable for NSF/H1, selected from the aforementioned polyalphaolefins, are particularly preferred.
- the polyalphaolefin also preferably comprises mixtures of acid-catalyzed and metallocene-catalyzed polyalphaolefins.
- the polyalphaolefin is a polyalphaolefin made from o-olefins selected from 1-octene, 1-nonene, 1-decene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene , 1-heptadecene, 1-octadecene, 1-nonadecene, 1-eicosene, 1-docosene, 1-tetradocosene and mixtures thereof.
- Preferred polyalphaolefins are prepared from 1-octene, 1-nonene, 1-decene, 1-dodecene, 1-tridecene, 1-tetradecene and mixtures thereof or from 1-decene as the sole monomer. Quite NSF/H1-suitable polyalphaolefins, selected from the aforementioned polyalphaolefins, are particularly preferred.
- the content of polyalphaolefin is at least 72% by weight, preferably at least 73% by weight, more preferably from 75% by weight to 95% by weight, even more preferably from 78% by weight to 92% by weight and in particular from 80% by weight. % to 90% by weight, based on the total weight of the lubricant composition.
- the metallocene-catalyzed polyalphaolefin content is preferably at least 10% by weight, more preferably 10% by weight to 95% by weight, and/or at least 15% by weight, even more preferably from 15% by weight to 95% by weight. %, more preferably from 15% by weight to 90% by weight and in particular from 18% by weight to 90% by weight, more preferably from 10% by weight to 60% by weight, even more preferably from 10% by weight to 50% by weight .%, more preferably from 15% by weight to 60% by weight, even more preferably from 15% by weight to 50% by weight, in each case based on the total weight of the lubricant composition.
- a particularly preferred embodiment of the invention includes the use of a lubricant composition
- a lubricant composition comprising the following components: a) 72% by weight to 95% by weight of polyalphaolefin, b) 5% by weight to 28% by weight of lithium soap, each based on the total weight of the lubricant composition for lubricating work equipment that is used for processing, in particular for packaging, manufacturing, portioning, order picking, assembly, storage, extraction and/or conveyance, of food, luxury foods, cosmetics, pharmaceuticals and/or animal feed , wherein the content of metallocene-catalyzed polyalphaolefin is at least 10% by weight, more preferably from 10% by weight to 95 and / or at least 15% by weight, more preferably from 15% by weight to 95% by weight, even more preferably from 15% by weight.
- % to 90% by weight and in particular from 18% by weight to 90% by weight more preferably from 10% by weight to 60% by weight, more preferably from 10% by weight to 50% by weight, even more preferably from 15% by weight .% to 60% by weight, more preferably from 15% by weight to 50% by weight, in each case based on the total weight of the lubricant composition.
- This embodiment is particularly advantageous because it has particularly good low-temperature properties due to the metallocene-catalyzed polyalphaolefin content.
- the content of acid-catalyzed polyalphaolefin is at least 10% by weight, more preferably 10% by weight to 95% by weight, and/or at least 15% by weight, even more preferably from 15% by weight to 95% by weight .%, more preferably from 15% by weight to 90% by weight and in particular from 18% by weight to 90% by weight, in each case based on the total weight of the lubricant composition.
- the polyalphaolefin particularly preferably has a viscosity, measured according to ASTM D7042 - 21 (01.01.2021) at 100 ° C, of 4 mm 2 /s to 350 mm 2 /s, more preferably of 4 mm 2 /s to 250 mm 2 /s and in particular from 4 mm 2 /s to 180 mm 2 /s. More particularly preferably, the polyalphaolefin has a pour point measured according to ASTM D5950 2014-07 of at most -20°C, preferably at most -30°C and in particular at most -40°C.
- the lubricant composition may contain other base oils.
- Particularly preferred additional base oils are base oils suitable for NSF/H1.
- a base oil means the common base fluids used for the production of lubricants, in particular oils belonging to Groups I, II, II+, III, IV or V according to the classification of the American Petroleum Institute (API) [NLGI Spokesman, N. Samman, Volume 70, Number 1 1 , p.14ff] can be assigned to understand.
- API American Petroleum Institute
- Particularly preferred further base oils are selected from the group consisting of esters, ethers, in particular polyethers, phenyl ethers, perfluoropolyethers, mineral oils, white oils, synthetic hydrocarbons that do not belong to the class of polyalphaolefins, in particular alkylated naphthalenes, copolymers of unsaturated
- Hydrocarbons for example polymers of ethylene and Alphaolefins (for example Lucant HC-600®), natural hydrocarbons, native oils and derivatives of native oils, silicone oils, and mixtures thereof, these other base oils preferably being suitable for NSF/H1.
- Further base oils which are particularly preferred according to the invention are esters, ethers, preferably polyethers, diphenyl ethers, polyphenyl ethers, synthetic hydrocarbons, alkylated naphthalenes, white oils, copolymers of unsaturated hydrocarbons and/or mixtures thereof, these further base oils preferably being suitable for NSF/H1.
- ethers preferably polyalkylene glycols, in particular polypropylene glycol homopolymers and/or copolymers with ethyl groups and 1-methylethyl groups as carbon groups in the repeating unit, these other base oils preferably being suitable for NSF/H1.
- the further base oil is selected from the group consisting of esters, ethers, preferably polyethers, synthetic hydrocarbons, white oils, perfluoropolyethers, alkylated naphthalenes and mixtures thereof, these base oils preferably being suitable for NSF/H1.
- polyethers are polymers whose organic repeating unit consists of ether Functionalities (COC) are formed. In the subgroup of polyphenyl ethers, the carbon portion of the repeating unit consists of phenyl groups. In the subgroup of polyalkylene glycols, the carbon portion of the repeating unit consists of substituted or unsubstituted ethyl groups (OCCO), such as ethyl groups, 1-methyl-ethyl groups, 1-ethyl-ethyl groups.
- OCCO substituted or unsubstituted ethyl groups
- Such polyalkylene glycol homopolymers are typically also referred to as polyethylene glycol, polypropylene glycol and polybutylene glycol.
- Polymers which have mixtures of differently substituted ethyl groups such as ethyl groups, 1-methyl-ethyl groups, 1-ethyl-ethyl groups as carbon components of the repeating unit are also referred to as polyalkylene glycols. These polyalkylene glycols can be present both as block polymers and as polymers with a random distribution of the carbon groups.
- Further preferred polyethers are polytetrahydrofurans and oxetane polymers which have four (OCCCCO) or three carbons (OCCCO) in the carbon portion of the repeating unit.
- Preferred polyethers are polyalkylene glycols.
- Particularly preferred polyalkylene glycols are polypropylene glycol homopolymers and/or copolymers with ethyl groups and 1-methylethyl groups as carbon groups in the repeating unit.
- Oxetane polymers are independently preferred
- Hydroxide groups and/or alkoxide groups, where the alkyl moiety is Alkoxide groups can be formed from C1 to C20 alkyl groups.
- the end groups of the polyalkylene groups can also be substituted.
- the end group can be introduced in the production of the polyalkylene glycols, polytetrahydrofurans and oxetane polymers by reacting the monomeric ethylene oxides, tetrahydrofurans or oxetanes with a monofunctional starter.
- Monofunctional starters are preferably alcohols, especially butanol.
- Two or more chains of polyalkylene glycols, polytetrahydrofurans and oxetane polymers can also be linked via an end group.
- Alkyl groups are preferred as the linking end group. This can be done in the production of polyalkylene glycols, polytetrahydrofurans and oxetane polymers from ethylene oxides, tetrahydrofurans or oxetanes with a nucleophilic di- or higher-functional starter. Examples of difunctional starters are diols, especially 1,2-ethanediol.
- Very particularly preferred polyethers are polyalkylene glycols, more preferably polypropylene glycol homopolymers and/or copolymers with ethyl groups and 1-methylethyl groups as carbon groups in the repeating unit.
- the aforementioned polyalkylene glycols are also particularly preferred if butanol or 1,2-ethanediol are used as starters.
- the aforementioned polyalkylene glycols are also particularly preferred if they have a butyl group as the end group and/or are linked via an ethylene group.
- Preferred esters are carboxylic acid esters, preferably monoesters, diesters, triesters, tetraesters, pentaesters, polyesters, estolides and mixtures thereof. Diesters, triesters, tetraesters, pentaesters, polyesters, estolides and mixtures thereof are particularly preferred. Estolides are particularly preferred because they can be particularly suitable for food lubricants.
- esters are aromatic esters, preferably of aromatic di-, tri- or tetracarboxylic acids with one or in a mixture of C7 to C22 alcohols and aliphatic esters, preferably of monocarboxylic acids and/or dicarboxylic acids with a mono-, Di-, tri-, tetra, penta, hexa-alcohol with a carbon number of 3 to 22, polyol esters, such as preferably complex esters, estolides and mixtures thereof, these esters preferably being suitable for NSF/H1.
- the acid and/or alcohol component of the carboxylic acid esters independently preferably has a number of carbon atoms from C3 to C54.
- Estolides are oligomers of aliphatic hydroxycarboxylic acids, preferably of 12-hydroxystearic acid, or oligomers of unsaturated carboxylic acids, preferably of oleic acid, in which the terminal carboxylic acid group is preferably branched with a mono-alcohol, dialcohol, trialcohol and/or tetra-alcohol Monoalcohols, most preferably Guerbet alcohols, are esterified and in which any free hydroxide groups can be esterified by reaction with monocarboxylic acids or dicarboxylic acids.
- Aliphatic esters of monocarboxylic acids and/or dicarboxylic acids with a carbon number of C3 to C40 with a mono-, di-, tri-, tetra-, penta-, hexa-alcohol present individually or in mixtures with a carbon number of 3 to 22 are particularly preferred.
- aliphatic esters of monocarboxylic acids with a carbon number of C5 to C22 with a tri, tetra, hexa-alcohol present individually or in mixtures with a carbon number of C3 to C10, in particular trimethylolpropane, pentaerythritol and / or dipentaerythritol, and / or dicarboxylic acids , with a carbon number of C6 to C40, in particular C18 dimer acids, with a mono- and/or dialcohol present individually or in mixtures with a carbon number of 6 to 22.
- esters of trimethylolpropane are particularly preferred.
- Pentaerythritol and/or dipentaerythritol with aliphatic C7 to C22 Carboxylic acids and/or esters of C18 dimer acids with C7 to C22 alcohols. Esters suitable for NSF/H1 are particularly preferred.
- the proportion of the additional base oil in the lubricant composition is preferably from 4 to 23% by weight, more preferably from 5 to 22% by weight, in particular from 6 to 20% by weight, based in each case on the total weight of the lubricant composition.
- the lubricant composition contains 5% by weight to 28% by weight of lithium soap as a thickener.
- Lithium soaps are lithium salts, usually lithium salt mixtures, of, preferably organic, acids and/or their esters, which have been reacted with lithium hydroxide to form the salt.
- lithium soaps can be produced by reacting organic acids and/or their esters with lithium hydroxide.
- Preferred lithium soaps are produced from mixtures of various carboxylic acids and/or their esters, since the technically available products generally contain such mixtures.
- lithium soaps are NSF/H1 compatible lithium soaps.
- the proportion of lithium soap in the lubricant composition according to the invention is preferably 5% by weight to 26% by weight, more preferably 5% by weight to 22% by weight and in particular 5% by weight to 18% by weight, each based on the total weight of the lubricant composition.
- Lithium soaps preferred according to the invention are lithium simple soaps, lithium complex soaps and/or mixtures thereof.
- Lithium simple soaps are lithium salts, usually lithium salt mixtures, of monofunctional, preferably organic, acids and/or their esters, which were reacted with lithium hydroxide to form the salt.
- the dropping point of lubricant compositions containing lithium simple soaps is at most 210°C, for example in the range from 180°C to 210°C, more preferably at most 200°C, for example in the range from 180°C to 200°C (ASTM D2265-20 May 2020).
- Lithium complex soaps are complex lithium salt mixtures, ie mixtures of various, preferably organic, acids and/or their esters, which have been reacted with lithium hydroxide to form the salt, the mixture containing a proportion of di- or higher-functional acids and/or esters.
- the acids and/or esters can independently have further functionalities, for example alcoholic hydroxide groups and/or acid amide groups.
- Lubricant compositions containing lithium complex soaps may have high dropping points, typically above 210°C, for example from 210°C to 300°C, more preferably above 230°C, for example from 230°C to 300°C (ASTM D2265-20 May 2020). Furthermore, such Lubricant compositions have good water resistance and wide operating temperature ranges. In a preferred embodiment, the lubricant composition therefore contains lithium complex soap.
- the lubricant composition contains a lithium complex soap, prepared starting from C4-C36 dicarboxylic acids, preferably azelaic acid, sebacic acid, suberic acid, terephthalic acid, dodecanedioic acid and / or starting from higher-functional carboxylic acids with 3 or more, preferably 3 to 4, carboxylic acid groups, where the number of carbon groups can be 6 to 60, such as preferably citric acid and/or trimer acids, and/or starting from ester compounds, in particular methyl esters and/or triglycerides of one or more of the aforementioned acids, each combined with one or more monocarboxylic acids, preferably combined with one or several C4-C24 monocarboxylic acids, preferably stearic acid, hydroxystearic acid, in particular 12-hydroxystearic acid, palmitic acid, oleic acid, salicylic acid, ester compounds, in particular methyl esters and / or triglycerides of one or
- Lithium complex soaps suitable for NSF/H1, selected from the aforementioned lithium complex soaps, are particularly preferred.
- Trimeric acids are referred to as: tricarboxylic acids obtained by trimerization of unsaturated fatty acids with preferably 54 carbon atoms and containing alkyl side chains, double bonds and cyclic ring systems.
- Lithium complex soaps are made from ester compounds, in particular methyl esters and/or triglycerides of the aforementioned carboxylic acids. Lithium complex soaps suitable for NSF/H1, selected from the aforementioned lithium soaps, are particularly preferred.
- the lubricant composition contains lithium simple soap, preferably lithium simple soap, which is produced starting from C4-C24 monocarboxylic acid, preferably stearic acid, hydroxystearic acid, in particular 12-hydroxystearic acid, palmitic acid, oleic acid, salicylic acid, ester compounds, in particular methyl esters and / or triglycerides of one or more of the aforementioned acids, sebacic acid monostearylamide, terephthalic acid monostearylamide and mixtures thereof.
- C4-C24 monocarboxylic acid preferably stearic acid, hydroxystearic acid, in particular 12-hydroxystearic acid, palmitic acid, oleic acid, salicylic acid, ester compounds, in particular methyl esters and / or triglycerides of one or more of the aforementioned acids, sebacic acid monostearylamide, terephthalic acid monostearylamide and mixtures thereof.
- NSF/H1 suitable lithium simple soaps selected from the aforementioned lithium soaps.
- Very particularly preferred lithium simple soaps are produced starting from mixtures of hydroxystearic acid, in particular 12-hydroxystearic acid and/or its esters on the one hand and Stearic acid and/or its esters on the other hand.
- the proportion of hydroxystearic acid, in particular 12-hydroxystearic acid and its esters, based on the total weight of: hydroxystearic acid, its esters, stearic acid and its esters, in the mixture is preferably 80% by weight to 90% by weight.
- the proportion of stearic acid and its esters, based on the total weight of: hydroxystearic acid, its esters, stearic acid and its esters, in the mixture is preferably 10% by weight to 20% by weight.
- Preferred lithium simple soaps are made from ester compounds, in particular methyl esters and/or triglycerides of the aforementioned carboxylic acids.
- NSF/H1 suitable lithium simple soaps, selected from the aforementioned lithium soaps, are particularly preferred.
- the lubricant composition can contain other thickeners as cover thickeners, for example layered silicates, in particular talc and/or mica, amorphous, hydrophilic and/or hydrophobic silicon dioxide, in particular Aerosil, urea thickeners, metal soap thickeners, in particular aluminum (Al), calcium - (Ca), barium (Ba), sodium (Na), magnesium (Mg) polymer thickeners and/or waxes.
- cover thickeners for example layered silicates, in particular talc and/or mica, amorphous, hydrophilic and/or hydrophobic silicon dioxide, in particular Aerosil, urea thickeners, metal soap thickeners, in particular aluminum (Al), calcium - (Ca), barium (Ba), sodium (Na), magnesium (Mg) polymer thickeners and/or waxes.
- cover thickeners for example layered silicates, in particular talc and/or mica, amorphous, hydrophilic and/or hydrophobic
- Preferred further thickeners as cover thickeners include layered silicates, in particular talc and/or mica, amorphous, hydrophilic and/or hydrophobized silicon dioxide, in particular Aerosil, urea thickeners, metal-soap thickeners, in particular Aluminum (Al), calcium (Ca), sodium (Na), magnesium (Mg) polymer thickeners and/or waxes.
- Cover thickeners suitable for NSF/H1, selected from the previously mentioned cover thickeners, are particularly preferred. If present, the amount of cover thickener in the lubricant composition according to the invention is preferably 0.5% by weight to 23% by weight, more preferably 0.5% by weight to 20% by weight and in particular 0.5% by weight to 12% by weight.
- % based on the total weight of the lubricant composition.
- Particularly preferred further thickeners are thickeners suitable for NSF/H1.
- the proportion of cover thickener, in particular layered silicate is less than 5% by weight. This is advantageous because wear can be kept low and settling behavior can be optimized.
- the lubricant composition comprises from 0.5% by weight to 23% by weight, more preferably from 0.5% by weight to 20% by weight, in particular from 0.5% by weight to 10% by weight.
- Polyisobutylene each based on the total weight of the lubricant composition.
- the polyisobutylene can be hydrogenated, partially hydrogenated or unhydrogenated.
- a particularly preferred polyisobutylene is an NSF/H1-compatible polyisobutylene.
- Fully hydrogenated polyisobutylene is also preferred because it has improved temperature resistance.
- the advantage of using polyisobutylene in the lubricant composition according to the invention is that it acts as Can act as a viscosity improver.
- the polyisobutylene has a number-average molecular weight of 115 to 10,000 g/mol, preferably 160 to 5000 g/mol.
- the molecular weight is determined using DIN 55672-1:2016-03 Gel Permeation Chromatography (GPC) - Part 1: Tetrahydrofuran (THF) as eluent.
- GPC Gel Permeation Chromatography
- THF Tetrahydrofuran
- the lubricant composition has a solid lubricant.
- Particularly preferred solid lubricants are NSF/H1-compatible solid lubricants. Inorganic or organic solid lubricants are conceivable.
- Preferred solid lubricants are selected from the group consisting of: polytetrafluoroethylene (PTFE), nitrides, preferably boron nitride, in particular hexagonal boron nitride, metal carbonates, in particular calcium carbonate, potassium carbonate, sodium bicarbonate, potassium dicarbonate, sodium carbonate, zinc carbonate, metal sulfides, in particular zinc (II) sulfide, metal phosphates , in particular calcium hexamethaphosphate, di- and tribasic magnesium phosphate, mono-, di- and tribasic calcium phosphate, mono-, di- and tribasic potassium phosphate, Potassium polymetaphosphate, potassium pyrophosphate, potassium tripolyphosphate, sodium acid pyrophosphat
- Solid lubricants suitable for NSF/H1, selected from the aforementioned solid lubricants, are particularly preferred.
- the proportion of solid lubricant in the lubricant composition according to the invention is 0.5% by weight to 23% by weight, more preferably 0.5% by weight to 20% by weight and in particular 0.5% by weight to 18% by weight, respectively based on the total weight of the lubricant composition.
- the proportion of solid lubricant, preferably disodium sebaccate, polytetrafluoroethylene (PTFE), hexagonal boron nitride, calcium carbonate and / or calcium pyrophosphate in the lubricant composition according to the invention is 5% by weight to 23% by weight, more preferably 10% by weight to 23 % by weight and in particular 15% by weight to 23% by weight, in each case based on the total weight of the lubricant composition.
- PTFE polytetrafluoroethylene
- hexagonal boron nitride hexagonal boron nitride
- calcium carbonate and / or calcium pyrophosphate in the lubricant composition according to the invention is 5% by weight to 23% by weight, more preferably 10% by weight to 23 % by weight and in particular 15% by weight to 23% by weight, in each case based on the total weight of the lubricant composition.
- the lubricant composition can also contain common additives such as corrosion protection additives, metal deactivators, viscosity improvers, wear protection additives and/or ion complexing agents.
- common additives such as corrosion protection additives, metal deactivators, viscosity improvers, wear protection additives and/or ion complexing agents.
- NSF/H1-suitable additives selected from the aforementioned additive groups, are particularly preferred.
- the proportion of additives in the lubricant composition according to the invention is 0.5% by weight to 23% by weight, more preferably 0.5% by weight to 15% by weight and in particular 0.5% by weight to 10% by weight, respectively based on the total weight of the lubricant composition.
- the lubricant composition comprises the following components: a) 36% by weight to 55% by weight of acid-catalyzed polyalphaolefin, b) 36% by weight to 55% by weight of metallocene-catalyzed polyalphaolefin, c) 1% by weight to 15% by weight of polyisobutylene, d) 5% by weight to 15% by weight .% lithium soap, e) 1% by weight to 10% by weight of solid lubricant, f) 0.5% by weight to 7% by weight of additives, each based on the total weight of the lubricant composition.
- Components a) to f) are particularly preferably compounds suitable for NSF/H1.
- the aforementioned lubricant composition comprises less than 0.1% by weight of boric acid and boric acid derivatives, each based on the total weight of the lubricant composition.
- the lubricant composition comprises the following components: a) 36% by weight to 45% by weight of acid-catalyzed polyalphaolefin, b) 36% by weight to 45% by weight of metallocene-catalyzed polyalphaolefin, c) 4% by weight to 8 % by weight of polyisobutylene, d) 5% by weight to 10% by weight of lithium soap, e) 1% by weight to 4% by weight of solid lubricant, f) 1% by weight to 3% by weight of additives, each based on the total weight of the lubricant composition.
- Components a) to f) are particularly preferably compounds suitable for NSF/H1.
- the aforementioned lubricant composition comprises less than 0.1% by weight of boric acid and boric acid derivatives, each based on the total weight of the lubricant composition.
- the lubricant composition consists of the following components: a) 36% by weight to 45% by weight of acid-catalyzed polyalphaolefin, b) 36% by weight to 45% by weight of metal locene-catalyzed polyalphaolefin, c) 4% by weight.
- Components a) to f) are particularly preferably compounds suitable for NSF/H1.
- the aforementioned lubricant composition comprises less than 0.1% by weight of boric acid and boric acid derivatives, each based on the total weight of the lubricant composition.
- lubricating work equipment is understood to mean, in particular, the lubrication of tribologically stressed components of the work equipment, such as the lubrication of rolling bearings, linear guides, hydraulic and pneumatic components, seals, plain bearings, chains, valves and/or fittings of the work equipment.
- the lubricant can be used both to operate the implement and to maintain the implement.
- the implements are used for processing, in particular for packaging, producing, portioning, storing, picking, packaging, obtaining and/or promoting food, luxury foods, cosmetics, pharmaceuticals and/or animal feed.
- Working devices preferred according to the invention are packaging machines, production machines, dismantling machines, packaging machines, picking machines and/or conveying machines.
- the use according to the invention includes lubricating Packaging machines for food and cosmetics, in particular packaging machines for cigarettes and/or the lubrication of transport and/or control chains.
- the proportion of metallocene-catalyzed PAO is always at least 10% by weight.
- Example 1 Comparison of the lithium soap grease 1 according to the invention with the Al complex soap grease 2 (comparison grease)
- a lithium soap grease 1 according to the invention and an Al complex soap grease 2 are produced with the composition mentioned in Table 1 below. Both the lithium soap grease 1 according to the invention and the Al complex soap grease 2 are suitable due to their composition H1.
- Composition 1 improved properties regarding
- Example 2 Comparison of the lithium soap grease 4 according to the invention with the Al complex soap grease 3 (comparison grease) A lithium soap grease 4 according to the invention and an Al complex soap grease 3 (comparison grease) are produced with the composition mentioned in Table 2 below. Both the lithium soap grease 4 according to the invention and the Al complex soap grease 3 are suitable due to their composition H1. Both greases are subjected to the technical tests specified in Table 2.
- Lithium soap greases 6 and 7 The lithium soap fats 6 and 7 according to the invention are produced with the composition given in Table 3 below. All fats are suitable for H1 due to their composition.
- the fats are subjected to the technical tests specified in Table 3.
- Table 3 Comparison of the lithium soap greases 6 and 7 according to the invention
- the grease 6 containing polyisobutylene shows a higher force in the tackiness test in order to cause the lubricating film to tear off when the measuring system is moved apart.
- Lithium soap grease 11 with the Al complex soap grease 10 (comparison grease) with regard to low-temperature behavior and high-temperature behavior
- the lithium soap grease 11 according to the invention has improved low-temperature behavior compared to the Al complex soap grease 10.
- a low flow pressure value according to DIN 51805-2 can be observed for the lithium grease, although it has a firmer consistency.
- a smaller change in the shear viscosity of the grease 11 according to the invention can be seen compared to comparison grease 10 after aging at 140 ° C. It also shows the improved thickening effect of the lithium soap thickener at the same content compared to the aluminum complex thickener.
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22164549 | 2022-03-25 | ||
| PCT/EP2022/081271 WO2023179897A1 (de) | 2022-03-25 | 2022-11-09 | Verwendung einer schmierstoffzusammensetzung zum schmieren von arbeitsgeräten |
Publications (1)
| Publication Number | Publication Date |
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| EP4499789A1 true EP4499789A1 (de) | 2025-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22817162.5A Pending EP4499789A1 (de) | 2022-03-25 | 2022-11-09 | Verwendung einer schmierstoffzusammensetzung zum schmieren von arbeitsgeräten |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250215349A1 (de) |
| EP (1) | EP4499789A1 (de) |
| MX (1) | MX2024011725A (de) |
| WO (1) | WO2023179897A1 (de) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005013266A1 (de) | 2005-03-22 | 2006-09-28 | KLüBER LUBRICATION MüNCHEN KG | Verwendung einer Schmierfettzusammensetzung |
| JP5060115B2 (ja) * | 2006-12-06 | 2012-10-31 | 出光興産株式会社 | グリース |
| JP5450935B2 (ja) * | 2007-07-06 | 2014-03-26 | Nokクリューバー株式会社 | グリース組成物 |
| JP5706883B2 (ja) * | 2010-03-26 | 2015-04-22 | 出光興産株式会社 | グリース組成物 |
| JP5796834B2 (ja) * | 2013-02-28 | 2015-10-21 | ミネベア株式会社 | 樹脂潤滑用グリース組成物 |
| DE102014018719A1 (de) | 2014-12-17 | 2016-06-23 | Klüber Lubrication München Se & Co. Kg | Hochtemperaturschmierstoff für die Lebensmittelindustrie |
| JP6870894B2 (ja) * | 2017-01-24 | 2021-05-12 | 住鉱潤滑剤株式会社 | 難燃性グリース組成物 |
| DE102017004541A1 (de) * | 2017-05-11 | 2018-11-15 | Klüber Lubrication München Se & Co. Kg | Schmierstoffzusammensetzung |
| CN107987943A (zh) | 2017-11-24 | 2018-05-04 | 无锡盛雅生物科技有限公司佛山分公司 | 一种食品机械用润滑剂及其制备方法 |
| CN107955694A (zh) | 2017-12-25 | 2018-04-24 | 新乡市恒星科技有限责任公司 | 一种食品机械专用润滑脂及其制备方法 |
| WO2020129587A1 (ja) * | 2018-12-20 | 2020-06-25 | Nokクリューバー株式会社 | 潤滑グリース組成物 |
| CN110157525A (zh) * | 2019-06-13 | 2019-08-23 | 安徽和欣润滑科技有限公司 | 一种汽车转向组合开关润滑脂的组合物及制备方法 |
| JP7473378B2 (ja) * | 2020-03-27 | 2024-04-23 | 住鉱潤滑剤株式会社 | 食品機械用潤滑剤組成物 |
-
2022
- 2022-11-09 EP EP22817162.5A patent/EP4499789A1/de active Pending
- 2022-11-09 WO PCT/EP2022/081271 patent/WO2023179897A1/de not_active Ceased
- 2022-11-09 US US18/850,583 patent/US20250215349A1/en active Pending
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| Publication number | Publication date |
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| WO2023179897A1 (de) | 2023-09-28 |
| US20250215349A1 (en) | 2025-07-03 |
| MX2024011725A (es) | 2024-12-06 |
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