Use of a lubricant composition for lubricating equipment

Abstract

The invention relates to the use of a lubricant composition comprising the following components: a) 72 wt.% to 95 wt.% polyalphaolefin, b) 5 wt.% to 28 wt.% lithium soap, each in relation to the total weight of the lubricant composition, for lubricating equipment which is used to process, in particular to package, produce, portion, pick, put together, store, obtain and / or convey foodstuffs, luxury foods, cosmetics, pharmaceuticals and / or feedstuffs, wherein the content of metallocene-catalysed polyalphaolefin is at least 10 wt.%, more preferably from 10 wt.% to 95 wt.%, each in relation to the total weight of the lubricant composition, and / or the content of acid-catalysed polyalphaolefin is at least 10 wt.%, more preferably from 10 wt.% to 95 wt.%, each in relation to the total weight of the lubricant composition.

Description

[0001] Use of a lubricant composition for lubricating work equipment

[0002] The invention relates to the use of a lubricant composition for lubricating working equipment used for processing, in particular for packaging, manufacturing, portioning, order picking, packaging, storage, extraction and / or conveying of foodstuffs, luxury goods, cosmetics, pharmaceuticals and / or animal feed.

[0003] Lubricants used to lubricate equipment used in the processing of food, luxury goods, cosmetics, pharmaceuticals, and / or animal feed are subject to specific requirements regarding their environmental compatibility and toxicity. A lubricant should be food-safe if it may come into direct or indirect contact with cosmetics, food, and luxury goods. Important areas of application in the food industry include chains in ovens and other high-temperature applications, as well as transport equipment, especially trolleys and their bearings. Food-safe lubricants are also required in other applications, such as packaging equipment, for example, for cigarettes.

[0004] Food-grade lubricants are subject to legal regulations, such as NSF / H1 or NSF / H2 certification. The "H1" classification is achieved by lubricants that are in "incidental food contact," meaning occasional, technically unavoidable contact with food. However, intentional or continuous contact must be excluded even when using "H1" lubricants. An "H2" classification can be achieved by lubricants that are non-toxic and non-carcinogenic. However, when using "H2" lubricants, any contact with food must be excluded.

[0005] Aluminum complex soaps are often used as thickeners in well-known food-grade lubricants because they are suitable for "H1" applications. Aluminum complex soaps have long been known as thickeners for lubricating grease compositions and have been described in numerous literature references, for example, in J.L. Dreher, T.H. Koundakijan, and C.F. "Manufacture and Properties of Aluminum Complex Greases," NLGI Spokesman, 107-113, 1965; H.W. Kruschwitz "The Development of Formulations for Aluminum Complex Thickener Systems," NLGI Spokesman, 51-59, 1976; and H.W. Kruschwitz "The Manufacture and Uses of Aluminum Complex Greases," NLGI National Meeting Preprints 1985. A disadvantage of lubricants containing aluminum complex soaps, however, is that they exhibit unsatisfactory technical performance for some food processing applications.For example, the food-grade lubricants containing aluminum complex soaps currently used lack the desired wear resistance for some food processing applications and / or exhibit poor seal resistance. It would therefore be desirable to obtain a lubricant that can be formulated to meet "H1" standards and that does not exhibit these disadvantages.

[0006] CN 107955694 A describes a lubricating grease for food processing machinery made from, by weight, 250-350 parts base oil, 50-60 parts fatty acid, 10-20 parts calcium hydroxide, 5-10 parts lithium hydroxide, 1-3 parts inorganic acid, 3-5 parts antioxidant, and 8-12 parts rust inhibitor, with boric acid being the inorganic acid. The grease is said to have a high dropping point of up to 260°C and good corrosion resistance. A disadvantage of this grease is the high proportion (1-3 wt%) of boric acid, which is harmful to health.

[0007] The CN 107987943 A describes a lubricant for

[0008] 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 sulfurized lard, 5 to 10 parts of modified soybean oil, 4 to 8 parts of catechin gallate, 3 to 6 parts of sodium laurylsulfonate, 3 to 6 parts of propylene glycol fatty acid esters, 2 to 4 parts of soybean phospholipids, 2 to 5 parts of monoalkyl ether phosphate triethanolamine salt, 0.5 to 1 part of thiobisphenol, 2 to 4 parts of lithium 12-hydroxystearate, 1 to 2 parts of zinc stearate, 1.2 to 1.5 parts of nanomolybdenum disulfide, 0.3 to 0.5 parts of zinc dialkyldithiophosphate, 1 to 3 parts of dibutylhydroxytoluene, 15 to 25 parts of water. It can be assumed that the lubricant described has an intense odor of sulfur due to the use of raw materials containing sulfur.Furthermore, lubricants containing animal components, such as lard, are not suitable for food processing and are even unsuitable for kosher foods. The use of zinc stearate is also unacceptable for health reasons.

[0009] DE 102005013266 A1 describes the use of a lubricating grease composition consisting of at least 50 wt.% of a base oil selected from the group of hydrocarbons, polyalkylene glycols, silicone oils, esters or perfluorinated polyethers; up to 20 wt.% 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 wt.% of at least one solid lubricant from the group of polymers; silicates; carbon blacks; graphites or based on metal sulfides, phosphates, oxides or hydroxides and up to 20 wt.% of at least one preservative selected from the group of quaternary ammonium salts;

[0010] Sorbic acid, formic acid or 4-hydroxybenzoic acid esters and other additives as lubricants for beer bottling plants.

[0011] A lubricating grease composition with the following composition is described as particularly suitable:

[0012] - 63.7 wt% mineral oil according to Chemical Abstracts Substances CAS 66037-01-4;

[0013] - 12.7 wt.% aluminum stearoyl benzoyl hydroxide according to CAS 68815-27-0;

[0014] - 4.5 wt.% solid lubricants in the form of metal sulfide thickeners;

[0015] - 11.5 wt.% layered silicate with swelling agent;

[0016] - 5.0 wt% triglyceride esters;

[0017] - 1.05 wt.% corrosion protection additives consisting of non-ferrous metal deactivators;

[0018] - 0.5% w / w phenolic antioxidants;

[0019] - 0.75 wt.% sulphur and phosphorus containing extreme pressure and antiwear additives and

[0020] - 0.3 wt% sorbic acid.

[0021] As explained above, grease compositions based on aluminum thickeners exhibit unsatisfactory mechanical properties for some applications. Furthermore, layered silicates, which are typically used to increase consistency, can lead to increased wear in some applications.

[0022] EP 3375850 A1 describes a food-compatible high-temperature grease comprising the following components: a) 91.9 to 30 wt.% 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) ester (2), wherein the mixing ratio of (1) to (2) is 99:1 to 1:99, alkyl aromatics, estolides; b) 6 to 45 wt.% 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 wt.% additives, individually or in combination, selected from the group consisting of anti-corrosion additives, antioxidants, anti-wear additives, UV stabilizers, inorganic or organic solid lubricants and d) 2 to 20 wt.% thickener.Thickeners that can be used include urea, aluminum 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 aforementioned thickeners. The component can comprise a) as an additional 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. These polar formulations, which contain more than 30% by weight of ester, risk being very complex to adapt to specific applications, particularly when using seals based on NBR, HNBR, ACM, and other polar seals.In particular, compensating for the potentially high swelling caused by the esters used can require considerable effort.

[0023] IN 201821017762 A describes greases containing native oils such as castor oil, thickened with a lithium / boron complex soap. The description states that this lubricant formulation can be used for direct food contact. A disadvantage of this composition is the boric acid content, which is harmful to health.

[0024] The object of the present invention is to provide a lubricant composition that can be used to lubricate work equipment used for processing, in particular for packaging, manufacturing, portioning, order-picking, packaging, storage, extraction, and / or conveying foodstuffs, luxury goods, cosmetics, pharmaceuticals, and / or animal feed, and that at least partially eliminates the aforementioned disadvantages. In particular, the lubricant composition "H1" should be able to be formulated in a suitable manner while still exhibiting good wear resistance and high resistance to elastomeric seals.In addition, the lubricant composition is said to have improved low-temperature behavior and better temperature resistance compared to lubricant compositions containing aluminum complex soaps as thickeners and to show improved technical performance, at least for some food processing applications.

[0025] This object is achieved by the use of a lubricant composition comprising the following components: a) 72 wt.% to 95 wt.% polyalphaolefin, b) 5 wt.% to 28 wt.% lithium soap, in each case based on the total weight of the lubricant composition, for lubricating work equipment which is used for processing, in particular for packaging, manufacturing, portioning, order-picking, packaging, storage, extraction and / or extraction, of foodstuffs, luxury goods, cosmetics, pharmaceuticals and / or animal feed, wherein the content of metallocene-catalyzed polyalphaolefin is at least 10 wt.%, more preferably from 10 wt.% to 95 wt.%, in each case based on the total weight of the lubricant composition, and / or the content of acid-catalyzed polyalphaolefin is at least 10 wt.%, more preferably from 10 wt.% to 95 wt.%, in each case based on the total weight of the lubricant composition.

[0026] In a preferred embodiment, the lubricant composition according to the invention is NSF / H1 compliant. This means that it is manufactured using NSF / H1 compliant raw materials. NSF / H1 compliant 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 approved raw materials can be published or treated confidentially. This makes the composition ideal for lubricating equipment in the aforementioned fields.

[0027] Practical tests have also shown that the lubricant composition exhibits good wear resistance and high resistance to elastomeric seals. Furthermore, compared to lubricant compositions containing aluminum complex soaps as thickeners, it offers improved technical performance for various food processing applications. In particular, compared to these lubricant compositions, the lubricant composition exhibits the following advantages at comparable base oil viscosity (40 °C): • Flow pressure down to -50 °C

[0028] • significantly lower evaporation loss even at 140 °C

[0029] • < 50% shear viscosity difference after evaporation loss even at 140 °C

[0030] • longer service life even at 120°C

[0031] • improved adhesion

[0032] A further advantage of using lithium soap thickeners compared to aluminum complex soaps is that their thickening effect is stronger, allowing for the production of firmer lubricating greases even without co-thickeners (e.g., bentonite). For the H1 range, aluminum complex soap greases have a regulatory limit of a maximum of 10 wt.% pure thickener. Significantly firmer consistencies can be achieved with lithium soaps than with aluminum complex greases.

[0033] In a preferred embodiment of the invention, the lubricant composition comprises less than 0.1 wt.% boric acid and boric acid derivatives, each based on the total weight of the lubricant composition.

[0034] Boric acid derivatives are compounds that are obtained by chemical

[0035] They are obtained by converting boric acid and contain a central boron atom coordinated with three or four oxygen atoms. Boric acid derivatives contain another atom or group of atoms instead of one or more hydrogen atoms.

[0036] In the lubricant sector, boric acid derivatives are typically understood to be compounds obtained by chemical reaction of boric acid with bases contained in the lubricant composition, in particular with metal carbonates (lithium soaps) or metal hydroxides used as thickeners, ie metal borates and boric acid esters.

[0037] In a preferred embodiment of the invention, the lubricant composition contains less than 0.1 wt.% boric acid, calcium borate and lithium borate, based on the total weight of the lubricant composition.

[0038] According to the invention, the lubricant composition contains 72% to 95% by weight of polyalphaolefin (PAO). The PAO acts as the base oil. Particularly preferred polyalphaolefins are NSF / H1-compliant polyalphaolefins. An advantage of polyalphaolefins is their good sealing compatibility with polar sealing materials, such as NBR, HNBR, and ACM. They also enable improved low-temperature properties compared to white oils and mineral oils. Polyalphaolefins can be produced from a single alpha-olefin or from mixtures of alpha-olefins, for example, via acid catalysis or metallocene catalysis.

[0039] According to the invention, the polyalphaolefin preferably comprises acid-catalyzed polyalphaolefin, metallocene-catalyzed polyalphaolefin, and / or mixtures thereof. Metallocene-catalyzed PAOs (mPAO) lead to more highly ordered structures because rearrangement during the polymer reaction can be reduced. Preferred commercial products for mPAOs are Spectrasyn Elite 65®, Spectrasyn Elite 150®, Spectrasyn Elite 300®, Durasyn 1801®, Durasyn 174 I®, and Synfluid mPAO 100 cst.®. Acid-catalyzed PAOs generally yield higher polydispersity and are more likely to exhibit isomerization. Preferred commercial products are Synfluid PAO 4®, Spectrasyn 4®, Durasyn 164®, Spectrasyn 40®, and Synton PAO 40®. In a preferred embodiment, the polyalphaolefin comprises mixtures of oligomers and / or polymers, as is common in commercially available products. NSF / H1-compliant polyalphaolefins selected from the aforementioned polyalphaolefins are particularly preferred.

[0040] The polyalphaolefin also preferably comprises mixtures of acid-catalyzed and metallocene-catalyzed polyalphaolefins. In another preferred embodiment, the polyalphaolefin is a polyalphaolefin prepared 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-tetradocose, 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. NSF / H1-compatible polyalphaolefins selected from the aforementioned polyalphaolefins are particularly preferred.

[0041] According to the invention, the polyalphaolefin content 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, in each case based on the total weight of the lubricant composition.

[0042] In one embodiment of the invention, the content of metallocene-catalyzed polyalphaolefin is preferably at least 10 wt.%, more preferably 10 wt.% to 95 wt.%, and / or at least 15 wt.%, more preferably from 15 wt.% to 95 wt.%, more preferably from 15 wt.% to 90 wt.% and in particular from 18 wt.% to 90 wt.%, more preferably from 10 wt.% to 60 wt.%, more preferably from 10 wt.% to 50 wt.%, more preferably from 15 wt.% to 60 wt.%, more preferably from 15 wt.% to 50 wt.%, in each case based on the total weight of the lubricant composition.

[0043] In this respect, a particularly preferred embodiment of the invention comprises the use of a lubricant composition comprising the following components: a) 72 wt.% to 95 wt.% polyalphaolefin, b) 5 wt.% to 28 wt.% lithium soap, in each case based on the total weight of the lubricant composition for lubricating work equipment used for processing, in particular for packaging, manufacturing, portioning, order-picking, packaging, storage, extraction and / or conveying, of foodstuffs, luxury goods, cosmetics, pharmaceuticals and / or animal feed, wherein the content of metallocene-catalyzed polyalphaolefin is at least 10 wt.%, more preferably from 10 wt.% to 95 and / or at least 15 wt.%, more preferably from 15 wt.% to 95 wt.%, more preferably from 15 wt.% to 90 wt.% and in particular from 18 wt.% to 90 wt.%, more preferably from 10 wt.% to 60 wt.%, still more preferably from 10 wt% to 50 wt%, even more preferably from 15 wt%.% to 60 wt.%, more preferably from 15 wt.% to 50 wt.%, in each case based on the total weight of the lubricant composition.

[0044] This embodiment is particularly advantageous because it has particularly good low-temperature properties due to the content of metallocene-catalyzed polyalphaolefin.

[0045] In a further preferred embodiment of the invention, the content of acid-catalyzed polyalphaolefin is at least 10 wt.%, more preferably 10 wt.% to 95 wt.%, and / or at least 15 wt.%, more preferably from 15 wt.% to 95 wt.%, even more preferably from 15 wt.% to 90 wt.% and in particular from 18 wt.% to 90 wt.%, in each case based on the total weight of the lubricant composition.

[0046] Particularly preferably, the polyalphaolefin has a viscosity, measured according to ASTM D7042 - 21 (01.01.2021) at 100 °C of 4 mm 2 / s up to 350 mm 2 / s, more preferably 4 mm2 / s up to 250 mm 2 / s and especially 4 mm 2 / s up to 180 mm 2 / s. Furthermore, the polyalphaolefin particularly preferably has a pour point measured according to ASTM D5950 2014-07 of at most -20°C, preferably of at most -30°C, and in particular of at most -40°C.

[0047] In addition to the polyalphaolefin, the lubricant composition may contain other base oils. Particularly preferred other base oils are NSF / H1 compatible base oils. A base oil is understood to mean the base fluids customarily used for the production of lubricants, in particular oils that can be assigned 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 11, p.14ff]. Particularly preferred other 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

[0048] Hydrocarbons, for example polymers of ethylene and alpha olefins (for example Lucant HC-600®), natural hydrocarbons, native oils and derivatives of native oils, silicone oils, and mixtures thereof, whereby these additional base oils are preferably NSF / H1 compatible.

[0049] Particularly preferred further base oils 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, with these further base oils preferably being NSF / H1 compatible. Very particular preference is given to 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, with these further base oils preferably being NSF / H1 compatible.

[0050] In a particularly preferred embodiment of the invention, 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 NSF / H1 compatible.

[0051] Other preferred base oils are polyethers. Polyethers are polymers whose organic repeating units are formed from ether functionalities (COC). 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-methylethyl groups, or 1-ethylethyl groups. Such polyalkylene glycol homopolymers are typically also referred to as polyethylene glycol, polypropylene glycol, and polybutylene glycol. Polyalkylene glycols also refer to polymers that contain mixtures of variously substituted ethyl groups, such as ethyl groups, 1-methylethyl groups, or 1-ethylethyl groups, as carbon portions of the repeating unit.These polyalkylene glycols can be present both as block polymers and as polymers with a random distribution of carbon groups. Other preferred polyethers are polytetrahydrofurans and oxetane polymers, which have four (OCCCCO) or three carbon atoms (OCCCO) in the carbon portion of the repeat unit, respectively.

[0052] 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.

[0053] The end groups of polyalkylene glycols, polytetrahydrofurans and

[0054] Oxetane polymers are independently preferred

[0055] Hydroxide groups and / or alkoxide groups, where the alkyl portion of the alkoxide groups can be formed from C1 to C20 alkyl groups. The end groups of the polyalkylene groups can be additionally substituted. The end group can be introduced during the preparation 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 achieved during the preparation of the polyalkylene glycols, polytetrahydrofurans, and oxetane polymers from ethylene oxides, tetrahydrofurans, or oxetanes using a nucleophilic di- or higher-functional starter.Examples of difunctional starters are diols, especially 1,2-ethanediol.

[0056] Very particularly preferred polyethers are polyalkylene glycols, even more preferably polypropylene glycol homopolymers and / or copolymers having ethyl groups and 1-methylethyl groups as carbon groups in the repeating unit. The aforementioned polyalkylene glycols are also particularly preferred when butanol or 1,2-ethanediol are used as starter. The aforementioned polyalkylene glycols are also particularly preferred when they have a butyl group as an 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 very particularly preferred because they can be particularly suitable for food-grade lubricants.

[0057] Likewise preferred esters are aromatic esters, preferably of aromatic di-, tri-, or tetracarboxylic acids with one or 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, or hexa-alcohol having a carbon number of 3 to 22, present individually or in mixtures, 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 of one another, preferably has a number of carbon atoms from C3 to C54.

[0058] 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 esterified with a mono-alcohol, dialcohol, trialcohol and / or tetraalcohol, preferably branched monoalcohols, very particularly preferably Guerbet alcohols, and in which free hydroxide groups may possibly be esterified by reaction with monocarboxylic acids or dicarboxylic acids.

[0059] Particularly preferred are aliphatic esters of monocarboxylic acids and / or dicarboxylic acids having a carbon number of C3 to C40 with a mono-, di-, tri-, tetra, penta, hexa-alcohol having a carbon number of 3 to 22, present individually or in mixtures.

[0060] Even more preferred are aliphatic esters of monocarboxylic acids and / or dicarboxylic acids having a carbon number of C3 to C40 with a mono-, tri-, tetra, hexa-alcohol having a carbon number of 3 to 22, present individually or in mixtures.

[0061] Even more preferred are aliphatic esters of monocarboxylic acids having a carbon number of C5 to C22 with a tri, tetra, hexa-alcohol having a carbon number of C3 to C10, in particular trimethylolpropane, pentaerythritol and / or dipentaerythritol, present individually or in mixtures, and / or of dicarboxylic acids having a carbon number of C6 to C40, in particular C18 dimer acids, with a mono- and / or dialcohol having a carbon number of 6 to 22, present individually or in mixtures.

[0062] Particularly preferred are esters of trimethylolpropane,

[0063] Pentaerythritol and / or dipentaerythritol with aliphatic C7 to C22 carboxylic acids and / or esters of C18 dimer acids with C7 to C22 alcohols. NSF / H1-compatible esters are particularly preferred.

[0064] Preferably, the proportion of the further base oil in the lubricant composition, if present, is from 4 to 23 wt.%, more preferably from 5 to 22 wt.%, in particular from 6 to 20 wt.%, in each case based on the total weight of the lubricant composition.

[0065] In addition, according to the invention, the lubricant composition contains 5% 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 a salt.

[0066] Accordingly, 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 commercially available products generally contain such mixtures.

[0067] Particularly preferred lithium soaps are NSF / H1-compliant lithium soaps. The proportion of lithium soap in the lubricant composition according to the invention is preferably 5 wt.% to 26 wt.%, more preferably 5 wt.% to 22 wt.%, and especially 5 wt.% to 18 wt.%, in each case based on the total weight of the lubricant composition.

[0068] Lithium soaps preferred according to the invention are lithium single soaps, lithium complex soaps, and / or mixtures thereof. Lithium single soaps are lithium salts, generally lithium salt mixtures, of monofunctional, preferably organic, acids and / or their esters, which have been reacted with lithium hydroxide to form a salt. Typically, the dropping point of lubricant compositions containing lithium single 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, i.e., mixtures of various, preferably organic, acids and / or their esters, which have been reacted with lithium hydroxide to form a salt, wherein the mixture contains a proportion of di- or higher-functional acids and / or esters.The acids and / or esters can independently contain additional functionalities, for example, alcoholic hydroxide groups and / or acid amide groups. Lubricant compositions containing lithium complex soaps can have high dropping points, generally 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 exhibit good water resistance and wide operating temperature ranges. Therefore, in a preferred embodiment, the lubricant composition contains lithium complex soap.

[0069] In a particularly preferred embodiment, 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-functionality carboxylic acids having 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, in each case combined with one or more monocarboxylic acids, preferably combined with one or more 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 more of the aforementioned acids and / or combined with sebacic acid monostearylamide and / or terephthalic acid monostearylamide. NSF / H1-compatible lithium complex soaps selected from the aforementioned lithium complex soaps are particularly preferred. Trimer acids are tricarboxylic acids obtained by trimerization of unsaturated fatty acids, preferably with 54 carbon atoms, which contain alkyl side chains, double bonds, and cyclic ring systems.

[0070] Preferred lithium complex soaps are prepared from ester compounds, especially methyl esters and / or triglycerides of the aforementioned carboxylic acids. NSF / H1-compatible lithium complex soaps selected from the aforementioned lithium soaps are particularly preferred.

[0071] In a further preferred embodiment, the lubricant composition contains lithium single soap, preferably lithium single soap which is prepared 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.

[0072] Particularly preferred are NSF / H1-compatible lithium single soaps selected from the aforementioned lithium soaps. Very particularly preferred lithium single soaps are prepared 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. 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% 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% to 20% by weight.

[0073] Preferred lithium simple soaps are prepared from ester compounds, especially methyl esters and / or triglycerides of the aforementioned carboxylic acids. NSF / H1-compatible lithium simple soaps selected from the aforementioned lithium soaps are particularly preferred.

[0074] In addition to the lithium soap, the lubricant composition may contain further 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. Preferred further thickeners as cover thickeners include 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), sodium (Na), magnesium (Mg) polymer thickeners and / or waxes. NSF / H1-compatible cover thickeners selected from the aforementioned cover thickeners are very particularly preferred.If present, the amount of co-thickener in the lubricant composition according to the invention is preferably 0.5 wt.% to 23 wt.%, more preferably 0.5 wt.% to 20 wt.%, and especially 0.5 wt.% to 12 wt.%, in each case based on the total weight of the lubricant composition. Particularly preferred additional thickeners are NSF / H1-compatible thickeners. In a preferred embodiment of the invention, however, the proportion of co-thickener, in particular phyllosilicate, is less than 5 wt.%. This is advantageous because it minimizes wear and optimizes settling behavior.

[0075] In a preferred embodiment of the invention, the lubricant composition comprises from 0.5 wt.% to 23 wt.%, even more preferably from 0.5 wt.% to 20 wt.%, in particular from 0.5 wt.% to 10 wt.% of polyisobutylene, based in each case 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-compliant polyisobutylene. Fully hydrogenated polyisobutylene is also preferred because of its improved temperature resistance. An advantage of using polyisobutylene in the lubricant composition according to the invention is that it can function as a viscosity improver. A further advantage is that it enables an increase in base oil viscosity and an improvement in adhesion. According to a further preferred embodiment, the polyisobutylene has a number-average molecular weight of 115 to 10.000 g / mol, preferably from 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 the eluent. At molecular weights below 115 g / mol, the polyisobutylene tends to evaporate rapidly and does not sufficiently improve adhesion. At molecular weights greater than 10,000 g / mol, the shear resistance is insufficient.

[0076] In a preferred embodiment, the lubricant composition comprises 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, acidic sodium pyrophosphate, sodium hexametaphosphate, sodium metaphosphate, mono-, di- and tribasic sodium phosphate, sodium trimetaphosphate,Sodium tripolyphosphate, zirconium phosphate, calcium phosphate, calcium pyrophosphate, zinc pyrophosphate, metal oxides, especially titanium dioxide, magnesium oxide, zinc oxide, aluminum oxide, tungsten oxide, meta II carboxylates, disodium sebacate, silicates except phyllosilicates, especially potassium silicates, calcium silicates, magnesium silicates, sodium silicates, talc (basic magnesium silicate), tricalcium silicate, aluminosilicate, aluminum calcium silicate, sodium aluminum silicate, acidic and basic sodium aluminum silicate, sodium calcium aluminum silicate, metal hydroxide, especially calcium hydroxide, magnesium hydroxide, potassium hydroxide, and mixtures of the solid lubricants. The solid lubricant is particularly preferably disodium sebacate, polytetrafluoroethylene (PTFE), hexagonal boron nitride, calcium carbonate, and / or calcium pyrophosphate.

[0077] NSF / H1-compatible solid lubricants selected from the aforementioned solid lubricants are particularly preferred. The proportion of solid lubricant in the lubricant composition according to the invention is preferably 0.5 wt.% to 23 wt.%, more preferably 0.5 wt.% to 20 wt.%, and in particular 0.5 wt.% to 18 wt.%, in each case based on the total weight of the lubricant composition. In a further preferred embodiment, the proportion of solid lubricant, preferably disodium sebacate, polytetrafluoroethylene (PTFE), hexagonal boron nitride, calcium carbonate, and / or calcium pyrophosphate, in the lubricant composition according to the invention is 5 wt.% to 23 wt.%, more preferably 10 wt.% to 23 wt.%, and in particular 15 wt.% to 23 wt.%, in each case based on the total weight of the lubricant composition. These higher amounts have the advantage that the solid lubricant can simultaneously have a thickening effect.

[0078] The lubricant composition may also contain conventional additives such as corrosion inhibitors, metal deactivators, viscosity improvers, wear protection additives, and / or ion complexing agents. NSF / H1-compliant additives selected from the aforementioned additive groups are particularly preferred. The proportion of additives in the lubricant composition according to the invention is preferably 0.5 wt.% to 23 wt.%, more preferably 0.5 wt.% to 15 wt.%, and in particular 0.5 wt.% to 10 wt.%, in each case based on the total weight of the lubricant composition.

[0079] In a particularly preferred embodiment of the invention, the lubricant composition comprises the following components: a) 36 wt.% to 55 wt.% acid-catalyzed polyalphaolefin, b) 36 wt.% to 55 wt.% metallocene-catalyzed polyalphaolefin, c) 1 wt.% to 15 wt.% polyisobutylene, d) 5 wt.% to 15 wt.% lithium soap, e) 1 wt.% to 10 wt.% solid lubricant, f) 0.5 wt.% to 7 wt.% additives, in each case based on the total weight of the lubricant composition.

[0080] Components a) to f) are particularly preferably NSF / H1 compatible compounds.

[0081] In a preferred embodiment of the invention, the aforementioned lubricant composition comprises less than 0.1 wt.% boric acid and boric acid derivatives, each based on the total weight of the lubricant composition. In a particularly preferred embodiment of the invention, the lubricant composition comprises the following components: a) 36 wt.% to 45 wt.% acid-catalyzed polyalphaolefin, b) 36 wt.% to 45 wt.% metallocene-catalyzed polyalphaolefin, c) 4 wt.% to 8 wt.% polyisobutylene, d) 5 wt.% to 10 wt.% lithium soap, e) 1 wt.% to 4 wt.% solid lubricant, f) 1 wt.% to 3 wt.% additives, each based on the total weight of the lubricant composition.

[0082] Components a) to f) are particularly preferably NSF / H1 compatible compounds.

[0083] In a preferred embodiment of the invention, the aforementioned lubricant composition comprises less than 0.1 wt.% boric acid and boric acid derivatives, each based on the total weight of the lubricant composition. In a particularly preferred embodiment of the invention, the lubricant composition consists of the following components: a) 36 wt.% to 45 wt.% acid-catalyzed polyalphaolefin, b) 36 wt.% to 45 wt.% metallocene-catalyzed polyalphaolefin, c) 4 wt.% to 8 wt.% polyisobutylene, d) 5 wt.% to 10 wt.% lithium soap, e) 1 wt.% to 4 wt.% solid lubricant, f) 1 wt.% to 3 wt.% additives, each based on the total weight of the lubricant composition.

[0084] Components a) to f) are particularly preferably NSF / H1-compliant compounds. In a preferred embodiment of the invention, the aforementioned lubricant composition comprises less than 0.1 wt.% boric acid and boric acid derivatives, each based on the total weight of the lubricant composition.

[0085] According to the invention, lubrication of work equipment refers in particular to the lubrication of components of the work equipment subject to tribological stress, 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 for the operation of the work equipment and for its maintenance.

[0086] According to the invention, the tools are used for processing, in particular for packaging, manufacturing, portioning, storage, order picking, packaging, extraction, and / or conveying of foodstuffs, luxury goods, cosmetics, pharmaceuticals, and / or animal feed. Preferred tools according to the invention are packaging machines, production machines, extraction machines, packaging machines, order picking machines, and / or conveying machines.

[0087] In a preferred embodiment, the use according to the invention comprises the lubrication of packaging machines for food and cosmetics, in particular packaging machines for cigarettes and / or the lubrication of transport and / or control chains.

[0088] Examples

[0089] The invention is explained in more detail below using several examples.

[0090] When using carboxylic acid esters instead of free carboxylic acid as raw material for the thickener, there is no fundamental change in the production process. When using a lithium soap instead of free carboxylic acid as raw material for the thickener,

[0091] Mix approximately 30% base oil with the lithium soap and heat to 210°C while stirring. In the lubricant compositions according to the invention, the proportion of metallocene-catalyzed PAO is always at least 10% by weight.

[0092] Example 1: Comparison of the lithium soap grease 1 according to the invention with the Al complex soap grease 2 (comparison grease)

[0093] A lithium soap grease 1 according to the invention and an Al complex soap grease 2 (comparative grease) are produced, each with the composition listed below in Table 1. Both the lithium soap grease 1 according to the invention and the Al complex soap grease 2 are suitable for H1 due to their composition.

[0094] Both greases are subjected to the technical tests listed in Table 1. For the elastomer tests, the samples are prepared as follows: For the static immersion test in the grease, at least five standard S2 shoulder bars (DIN 53504) are used to determine tensile strength and elongation at break, and at least three discs (36.6 mm diameter) are punched from a 2 (± 0.2) mm thick elastomer sheet to determine volume and hardness. For immersion, the volume of the grease is at least 15 times the total volume of the test specimens, based on DIN ISO 1817. The test results are shown in Table 1 below.

[0095] Table 1: Comparison of lithium soap grease 1 with Al complex soap grease 2 (comparison grease)

[0096] Table 1 shows that the inventive

[0097] Composition 1 improved properties with regard to

[0098] Low temperature suitability (see flow pressure results) and in terms of its compatibility with NBR and FKM elastomer as well as higher wear resistance and higher load carrying capacity (see

[0099] SRV and VKA results). In addition, the temperature resistance of the lithium soap grease 1 according to the invention is also significantly improved at 140°C, which is evident from the lower evaporation. 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, each with the composition stated below in Table 2. Both the lithium soap grease 4 according to the invention and the Al complex soap grease 3 are suitable for H1 due to their composition. Both greases are subjected to the technical tests stated in Table 2.

[0100] Table 2: Comparison of lithium soap grease 4 with the AI ​​complex soap grease 3 (comparison grease) It can be seen that the temperature resistance of the lithium soap grease 4 according to the invention is significantly improved at 120°C, which is reflected in a longer service life in the FE 9 testing machine. Example 3: Comparison of the inventive

[0101] Lithium soap greases 6 and 7 The lithium soap greases 6 and 7 according to the invention are produced with the compositions listed below in Table 3. Due to their composition, all greases are suitable for H1.

[0102] The greases are subjected to the technical tests specified in Table 3.

[0103] Table 3: Comparison of the lithium soap greases 6 and 7 according to the invention The polyisobutylene-containing grease 6 shows a higher force in the tackiness test to break the lubricating film when the measuring system is moved apart.

[0104] Example 4: Comparison of the inventive

[0105] Lithium soap grease 9 with the Al complex soap grease 8 (comparison grease) with regard to the thickening effect of the thickeners

[0106] The lithium soap grease 9 according to the invention and the Al-

[0107] Complex soap grease 8 (comparison grease) was prepared with the composition listed below in Table 4. Both greases are suitable for H1 due to their composition. The greases were compared with each other in terms of their consistency. The results are shown in Table 4. Table 4: Comparison of lithium soap grease 9 with Al complex soap grease 8 (comparison grease) with regard to the thickening effect of the thickeners. It can be seen that the inventive grease 9, with a Li thickener content of 10 wt.%, achieves a consistency of 265, while the corresponding Al complex grease 8, with a thickener content of 10 wt.%, only achieves a consistency of 311. Increasing the amount of thickener is no longer possible, as food approval is then no longer possible. Firmer consistencies < 310 are therefore difficult to achieve for Al complex soaps without co-thickeners such as bentonite. It was therefore shown that the thickening effect of the aluminum thickener is lower than that of the lithium thickener.

[0108] Example 5: Comparison of the inventive

[0109] Lithium soap grease 11 with the Al complex soap grease 10 (comparison grease) with regard to low temperature behaviour and high temperature behaviour

[0110] Table 5: Comparison of Al complex soap grease 10

[0111] (comparison grease) with the lithium soap grease 11 according to the invention

[0112] It is shown that the lithium soap grease 11 according to the invention exhibits improved low-temperature behavior compared to the aluminum complex soap grease 10. With a comparable base oil composition and content, a lower flow pressure value according to DIN 51805-2 is observed for the lithium grease, even though it has a firmer consistency. Furthermore, a smaller change in the shear viscosity of the inventive grease 11 is evident compared to the comparison grease 10 after aging at 140°C. Furthermore, the improved thickening effect of the lithium soap thickener at the same content compared to the aluminum complex thickener is again evident.

Claims

Patent claims 1. Use of a lubricant composition comprising the following components: a) 72 wt.% to 95 wt.% polyalphaolefin, b) 5 wt.% to 28 wt.% lithium soap, each based on the total weight of the lubricant composition, for lubricating work equipment used for processing, in particular for packaging, manufacturing, portioning, picking, assembly, storage, extraction and / or conveying, foodstuffs, beverages, cosmetics, pharmaceuticals and / or animal feed, characterized in that the content of metallocene-catalyzed polyalphaolefin is at least 10 wt.%, more preferably 10 wt.% to 95 wt.%, each based on the total weight of the lubricant composition, and / or the content of acid-catalyzed polyalphaolefin is at least 10 wt.%, more preferably 10 wt.% to 95 wt.%, each based on the total weight of the lubricant composition.

2. Use according to claim 1, characterized in that the lubricant composition is NSF / H1 compliant. Use according to claim 1 or claim 2, characterized in that the polyalphaolefin is a polyalphaolefin produced from o-olefins selected from 1-octene, 1-nonene, 1-decene, 1-dodecene, 1-tridecene, 1-tetradecene and mixtures thereof, or selected from 1-decene as the sole monomer. Use according to one or more of the preceding claims, characterized in that the polyalphaolefin content is at least 73 wt.%, more preferably 75 wt.% to 95 wt.%, in each case based on the total weight of the lubricant composition. Use according to one or more of the preceding claims, characterized in that the polyalphaolefin has a viscosity, measured according to ASTM D7042-21 at 100 °C, of ​​4 mm. 2 / s up to 350 mm 2 / s and / or has a pour point, measured according to ASTM D5950 2014-07, of at most -20°C, preferably at most -30°C. Use according to one or more of the preceding claims, characterized in that the lubricant composition comprises at least one further base oil selected from the group consisting of esters, ethers, in particular polyethers, phenyl ethers, comprising perfluoropolyethers, mineral oils, white oils, synthetic hydrocarbons not belonging to the class of polyalphaolefins, in particular alkylated naphthalenes, copolymers of unsaturated hydrocarbons, for example polymers of ethylene and alpha olefins, natural hydrocarbons, native oils and derivatives of native oils, silicone oils, and mixtures thereof, wherein the further base oils are preferably NSF / H1 compliant.

7. Use according to one or more of the preceding claims, characterized in that the lubricant composition comprises at least one further base oil selected from the group consisting of esters, ethers, preferably polyethers, synthetic hydrocarbons, white oils, perfluoropolyethers, alkylated naphthalenes and mixtures thereof, wherein the at least one base oil is preferably NSF / H1 compliant.

8. Use according to claim 6 or claim 7, characterized in that the proportion of the further base oil in the lubricant composition is 4 to 23 wt.%, more preferably 5 to 22 wt.%, in each case based on the total weight of the lubricant composition. Use according to one or more of the preceding claims, characterized in that the proportion of lithium soap in the lubricant composition is 5 wt.% to 26 wt.%, more preferably 5 wt.% to 22 wt.%, in each case based on the total weight of the lubricant composition. Use according to one or more of the preceding claims, characterized in that the lubricant composition contains a lithium simple soap prepared 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.use according to one or more of the preceding claims, characterized in that the lubricant composition contains a lithium simple soap, prepared 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. Use according to one or more of the preceding claims, characterized in that the lubricant composition contains a lithium complex soap prepared starting from C4-C36 dicarboxylic acids, preferably azelaic acid, sebacic acid, cortic acid, terephthalic acid, dodecanedioic acid and / or starting from higher-functional carboxylic acids with 3 or more, preferably 3 to 4, carboxylic acid groups, wherein the number of carbon atoms can be 6 to 60, such preferably citric acid and trimeric 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 more 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 more of the aforementioned acids and / or combined with sebacic acid monostearylamide and / or terephthalic acid monostearylamide. Use according to one or more of the preceding claims, characterized in that the lubricant composition contains further thickeners as coating thickeners, selected from 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.

4. Use according to one or more of the preceding claims, characterized in that the lubricant composition contains 0.5 wt.% to 23 wt.%, more preferably 0.5 wt.% to 20 wt.%, in particular 0.5 wt.% to 10 wt.% polyisobutylene, in each case based on the total weight of the lubricant composition.

15. Use according to claim 14, characterized in that the polyisobutylene has a number-average molecular weight of 1.15 to 10,000 g / mol, preferably of 160 to 5,000 g / mol, determined by DIN 55672-1 :2016-03.

16. Use according to one or more of the preceding claims, characterized in that the lubricant composition comprises a solid lubricant, preferably selected from the group consisting of disodium sebaccate, polytetrafluoroethylene (PTFE), hexagonal boron nitride, calcium carbonate and / or calcium pyrophosphate.

17. Use according to claim 16, characterized in that the proportion of solid lubricant in the lubricant composition according to the invention is 0.5 wt.% to 23 wt.%, more preferably 0.5 wt.% to 20 wt.% and in particular 0.5 wt.% to 18 wt.%, in each case based on the total weight of the lubricant composition.

18. Use according to one or more of the preceding claims, characterized in that the lubricant composition comprises the following components: a) 36 wt.% to 55 wt.% acid-catalyzed polyalphaolefin, b) 36 wt.% to 55 wt.% metal locene-catalyzed polyalphaolefin, c) 1 wt.% to 15 wt.% polyisobutylene, d) 5 wt.% to 15 wt.% lithium soap, e) 1 wt.% to 10 wt.% solid lubricant, f) 0.5 wt.% to 7 wt.% additives, each based on the total weight of the lubricant composition.

19. Use according to one or more of the preceding claims, characterized in that the The lubricant composition consists of the following components: a) 36 wt.% to 45 wt.% acid-catalyzed Polyalphaolefin, b) 36 wt.% to 45 wt.% metallocene-catalyzed Polyalphaolefin, c) 4 wt.% to 8 wt.% polyisobutylene, d) 5 wt.% to 10 wt.% lithium soap, e) 1 wt.% to 4 wt.% solid lubricant, f) 1 wt.% to 3 wt.% additives, each based on the total weight of the lubricant composition. Use according to one or more of the preceding claims, characterized in that the lubricant composition comprises less than 0.1 wt.% boric acid and boric acid derivatives, each based on the total weight of the lubricant composition. Use according to one or more of the preceding claims, characterized in that the lubrication of working equipment includes the lubrication of tribologically stressed components of the working equipment, such as the lubrication of rolling bearings, linear guides, hydraulic and pneumatic components, seals, plain bearings, chains, The application comprises the lubrication of working equipment, including valves and / or fittings, wherein the working equipment is preferably packaging machines, production machines, dismantling machines, assembly machines, order picking machines and / or conveying machines. The application according to one or more of the preceding claims is characterized in that the lubrication of working equipment includes the lubrication of packaging machines for food and cosmetics, in particular packaging machines for cigarettes, and / or the lubrication of transport and / or control chains.

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