BR112017012562B1 - High temperature lubricant for the food industry - Google Patents

Abstract

The present invention relates to a food compatible high temperature lubricant, in particular a high temperature oil or a high temperature grease comprising the following components: a) at least one oil selected from a trimellitic acid ester or a mixture of various trimellitic acid esters, alkylaromates, preferably a substituted aliphatic naphthalene or stolide; B) a hydrogenated or fully hydrogenated polyisobutylene or a mixture of hydrogenated or fully hydrogenated polyisobutylene; and c) additives, individually or in combination with each other. In the case of high temperature grease, a thickening agent is added.

Description

DESCRIPTION

[001] The present invention relates to high temperature lubricants, in particular a high temperature oil based on an aromatic ester, such as trimellitic acid ester and mixtures of various trimellitic acid esters, heteroaromates, stolides and a fully hydrogenated or hydrogenated polyisobutylene or a mixture thereof. Furthermore, the high temperature lubricant can be a high temperature grease if a thickener is added to the aforementioned components. The invention further relates to the use of these high temperature lubricants for lubricating work tools that are employed in food processing.

[002] In addition to the lubricating effect, lubricants must fulfill a variety of other tasks: they must cool, reduce friction, wear and force transmission, protect against corrosion and simultaneously have a sealing effect.

[003] Conventional lubricants are not suitable for high temperature applications as they are destroyed at high temperatures, for example through oxidation reactions and/or thermal decomposition and polymerization reactions and their lubricating properties are severely limited. In decomposition reactions the lubricant is cleaved into low molecular weight volatile components. Its evaporation causes unwanted changes in viscosity, oil leakage and excessive vapor formation. This results in a loss of lubrication. Also through polymerization, lubricants lose their lubricating effect due to the formation of insoluble polymerization products.

[004] The removal of these contaminants increases maintenance work and produces chemical residues that must be disposed of in a laborious way. Due to intensified cleaning and maintenance work, downtimes are increased. In general, using the wrong lubricant in high temperature applications leads to higher costs as work tools become dirty and there is a greater demand for lubricants. In addition, the quality of the product decreases.

[005] As base oils for high temperature applications, synthetic esters are often used, as they have very good thermal, hydrolytic and oxidative stability.

[006] To meet the various requirements in high temperature applications, lubricants must present, among others, high stability, low friction coefficients and high wear resistance. In order to ensure uniform lubrication even at high temperatures, a liquid lubricating film must remain between the metal parts during the entire processing process. Therefore, the lubricant should evaporate slightly at maximum processing temperature, forming little residue and forming as little cracking residue as possible.

[007] In synthesis operations, several tools are used. For these lubrication implements high temperature resistant lubricants are necessary High temperature processing oft occur in food processing, color: such as cooking, roasting, boiling, roasting, roasting, sterilizing, roasting and steaming. In synthesis operations, several tools are used. For these lubrication implements high temperature resistant lubricants are required.

[008] High processing temperatures usually occur during food processing, such as roasting, boiling, roasting, toasting, sterilization, roasting and evaporation. In these processes, various work tools can be used. For the lubrication of these work tools, lubricants resistant to high temperatures are required.

[009] As for base oils for the lubrication of work tools for food processing, high demands are placed on the lubrication of work tools for food processing with regard to their toxicity and compatibility with the environment. In principle a food compatible H1 lubricant should be suitable if the lubricant can come into direct or indirect contact with food, drink and foodstuffs. Among the preferred application areas in the food industry are chains in ovens and other high temperature applications as well as conveyor belts, especially trolleys and their bearings.

[010] These lubricants are subject to legal standards such as certification according to NSF/H1 or NSF/H2.

[011] The ,,H1" classification is derived from lubricants that are in ,,incidental food contact", that is, in a technically unavoidable contact with food. Intentional or permanent contact, however, must also be ruled out in the case of the use of lubricants,,H1". A classification of ,,H2" can be given to lubricants that are neither carcinogenic nor toxic. In the case of the use of lubricants,,H2", however, any contact with the food must be discarded.

[012] The downside to known food compatible lubricants that are used in the high temperature range is that they often have poor technical performance capability. Thus, the food-compatible lubricants used so far actually have good oxidation resistance and an acceptable pour point, their residue behavior after complete evaporation, however, does not correspond to the high demands placed on high-temperature application. The cracking residues formed form deposits, which need to be removed again after some time. In general, the operation of the facility needs to be adjusted and the residue dissolved or components replaced. There is therefore a need for a high-temperature lubricant, in which the evaporation of individual parts of base oil is greatly reduced and at constantly higher temperature for a long time the lubricating effect is lost.

[013] It is the task of the present invention to prepare a high-temperature oil and a high-temperature grease that corresponds to the standard of an NSF/H1 lubricant and, in addition, has satisfactory tribological properties. Especially the lubricant should show under high temperature for a long time a good lubricating effect. Furthermore, the cracking residues formed must not be varnished but must be dissolved again through fresh oil. In addition, the high temperature lubricant must have good hydrolytic stability, be resistant to corrosion and wear as well as have good oxidation resistance and low temperature behavior suited to the requirements.

[014] This task is solved according to the invention through a food-compatible high temperature oil comprising the following components: a) 93.9 to 45% 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)ester (2), the mixing ratio of (1) to (2) being 99:1 at 1 :99, alkylaromates, preferably aliphatically substituted naphthalene, stolides; b) 6 to 45% by weight of a polymer, namely a hydrogenated or fully hydrogenated polyisobutylene or a mixture of hydrogenated or fully hydrogenated polyisobutylene; c) 0.1 to 5% by weight of additive individually or in combination, selected from the group consisting of corrosion protection additive, antioxidants, anti-wear additives, UV stabilizers, inorganic or organic solid lubricants.

[015] The high temperature food compatible grease according to the invention comprises: a) 91.9 to 30% by weight of at least one oil, selected from the group consisting of a mixture of tri(iso-C10)ester of trimellitic acid (1) and tri(iso-C 13 )ester of trimellitic acid (2), the mixing ratio of (1) to (2) being from 99:1 to 1:99 of alkylaromates, preferably aliphatically substituted naphthalene, stolides; b) 6 to 45% by weight of a polymer, namely a hydrogenated or fully hydrogenated polyisobutylene or a mixture of hydrogenated or fully hydrogenated polyisobutylene; c) 0.1 to 5 % by weight of additive individually or in combination, selected from the group consisting of corrosion protection additive, antioxidants, anti-wear additives, UV stabilizers, inorganic or organic solid lubricants and d) 2 to 20 % by thickener weight.

[016] Surprisingly it has been found that the high temperature oil according to the invention and the high temperature grease according to the invention are both suitable for an H1 classification and also stand out for their extraordinary performance capability. Thus, the high temperature oil according to the invention or the high temperature grease show high thermal stability combined with a long service life and good properties.

[017] The high temperature oil according to the invention and the high temperature grease according to the invention comprise as an ester compound a trimellitic acid ester or a mixture of different trimellitic acid esters, the alcohol group of the ester is a straight or branched alkyl group having 8 to 16 carbon atoms. Depending on the choice of aromatic ester the properties of the lubricant, for example viscosity, viscosity-temperature behavior, oxidation resistance and residue behavior.

[018] According to an especially preferred embodiment of the invention the aromatic ester comprises a sterically hindered alcohol as the alcohol component, preferably an alcohol having 8 to 16 carbon atoms, especially 10 to 13 carbon atoms, especially tri(iso -C10)trimellitic acid ester (1) and trimellitic acid tri(iso-C13)ester (2). The mixing ratio of (1) to (2) is from 99:1 to 1:99, especially preferred is the mixing ratio of (1) : (2) of 87.12.

[019] The high temperature oil according to the invention or the high temperature grease according to the invention may contain a second oil which comprises an aroma. An aromate according to the invention is understood to be a monocyclic, bicyclic or tricyclic ring system with four to fifteen carbon atoms, the monocyclic ring system being aromatic or at least one of the rings in a bicyclic ring system. or tricyclic is aromatic. Preferably a bicyclic ring system having 10 carbon atoms is used.

[020] Preferably the aroma is substituted with one or more aliphatic substituents. Especially preferred the aromate is substituted with one to four aliphatic substituents and especially with two or three aliphatic substituents.

[021] An alkyl group is according to the invention a saturated aliphatic hydrocarbon group having 1 to 30, preferably 3 to 20, even more preferably 4 to 17 and especially 6 to 15 carbon atoms. An alkyl group may be straight or branched and is optionally substituted with one or more of the above-mentioned substituents.

[022] Practical tests have shown that mixtures of differently substituted naphthalenes, ie mixtures of naphthalenes, which have a different degree of substitution and different aliphatic substituents, are particularly suitable. By varying the composition of the mixture, properties such as viscosity, high temperature lubricant can be very easily adjusted in this case. Aliphatic substituted naphthalenes are further distinguished by their excellent dissolution properties and high thermo-oxidative stability.

[023] The viscosity, measured at 40°C, of substituted aliphatic naphthalene is preferably from 30 to 600 mm2 / s, more preferably from 30 to 300 m2 / s.

[024] In addition, stolides can also be used as a component a). Preferred viscosities measured at 40°C are between 30 and 500 mm 2 /sec. Especially preferred are viscosities of 30 to 140 mm 2 /sec.

[025] Under stolides is meant the ester compounds, which are produced by acid or enzymatic route - catalyzed from fatty acids preferably oleic acids or dicarboxylic acids or a mixture of both. In this case, the acidic function attacks the double bond of a fatty acid molecule, so that a higher molecular weight ester compound is produced. The terminal acid group is then normally esterified with an alcohol, preferably 2-ethylhexanol, and then the remaining double bonds are hydrogenated or esterified with a carboxylic acid such as acetic acid. Other alcohols such as iso-amyl alcohol or Guebert alcohols are also possible for the esterification of the terminal acid group.

[026] More stolides can also be synthesized through a condensation of hydroxycarboxylic acids or a condensation of hydroxycarboxylic acids with fatty acids such as oleic acid or stearic acid. The chain length of the used or unsaturated hydroxycarboxylic acids can range from C6 to C54. Acids may contain other functional groups such as amines, ethers, sulfur-containing groups. Furthermore, esterification with alpha-olefins or beta-farnesene is conceivable.

[027] The high temperature oil according to the invention or the high temperature grease also comprises a polyisobutylene. Through the proper choice of polyisobutylene, especially with regard to the degree of hydrogenation and molecular weight, the properties of the oil or grease according to the invention can, for example, influence its kinematic viscosity, in a desired way. Polyisobutylene can be used in hydrogenated or fully hydrogenated form, and a mixture of hydrogenated or fully hydrogenated polyisobutylene can also be used. Preferably, fully hydrogenated polyisobutylenes are used. Polyisobutylene is present in an amount of 6 to 45% by weight in the composition, preferably 10 to 45% by weight is used, especially 15 to 45% by weight.

[028] According to another preferred embodiment the polyisobutylene has a number average molecular weight from 115 to 10,000 g/mol, preferably from 160 to 5000 g/mol.

[029] The high temperature oil according to the invention or the high temperature grease also comprises from 0.1 to 5% by weight of additive, which are used individually or in combination and selected from the group consisting of protective additive against corrosion, antioxidants, anti-wear additives, UV stabilizers, inorganic or organic solid lubricants.

[030] The high temperature grease according to the invention further comprises a thickener. The thickener in the high temperature grease according to the invention of the lubricating composition is either a reaction product of a diisocyanate, preferably 2,4-diisocyanatotoluene, 2,6-diisocyanatotoluene, 4,4'-diisocyanatodiphenylmethane, 2,4' - diisocyanatophenyl-methane, 4,4'-diisocyanatodiphenyl, 4,4'-diisocyanato-3-3'-dimethylphenyl, 4,4'-diisocyanato-3,3'-dimethylphenylmethane, which can be used individually or in combination , with an amine of the general formula R'2-N-R, or a diamine of the general formula R'2-N-R-NR'2, wherein R is an aryl, alkyl or alkylene radical with 2 to 22 carbon atoms and R' is the same or different from a hydrogen, an alkyl, alkylene or aryl radical or with mixtures of amines and diamines or is selected from complex Al soaps, complex metal soaps from the elements of the first and second main groups of the periodic table, bentonites, sulfonates, silicates, aerosil, Polyimides, or PTFE or a mixture of the above thickener.

[031] In order to comply with legal requirements regarding the use of lubricants for the lubrication of work tools for food processing, it is convenient if the additives used have an H1 classification.

[032] The addition of antioxidants can reduce or even prevent the oxidation of the oil or grease according to the invention, especially when it is used. In an oxidation unwanted free radicals can arise and consequently increase the decomposition reactions of the lubricant to high temperature. By the addition of antioxidants, the high temperature grease is stabilized.

[033] According to the invention, particularly suitable antioxidants are the following food-compatible compounds:

[034] Diaromatic amine, phenolic resin, thiophenolic resin, phosphite, butylated hydroxytoluene, butylated hydroanisole, phenyl-alpha-naphthalene, phenyl-bethan-naphthalene, octyl/butylated diphenylamine, di-alpha-tocopherol, di-tert-butyl-phenyl , benzolpropanoic acid and mixtures of these components.

[035] Commercially available food compatible additives are: IRGANOX® 1010 (benzolpropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-2,2-bis[[3-[3,5-bis (1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]methyl]-1,3-propanedilester; IRGANOX® L06 (alkylated phenyl-alpha-naphthylamine or N-Phenyl-ar-(1,1,3, 3-Tetramethylbutyl)-1-naphthaleneamine; IRGANOX® L01 (Dioctylated Diphenylamine); IRGANOX® L57 (mixture of alkylated diphenylamines); IRGANOX® L06; IRGANOX® L 115; IRGANOX® L150 (mixture of high molecular weight amine or phenolic antioxidants ); IRGANOX® L64 (mixture of mono- and dialkyl-butyl/octyl-diphenylamine); IRGANOX® 1035; (blend consisting of Thiodiethylenebis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate); IRGANOX® 1010; IRGANOX ® L101 (blend consisting of Tetrakis[methylene-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]methane); IRGANOX® L109 (benzolpropanoic acid, 3,5-bis(1,1-dimethyl) )-4-hydroxy-1,6-hexanediyl ester) IRGANOX® L57, IRGANOX® L109, lrgalube® TPPT; IRGANOX® L115 (benzolpropanoic acid, 3,5-Bis(1,1-dimethylethyl)-4-hydroxy-, thiodi-2,1-ethanediyl ester); IRGANOX® E201 (Liquid DL-alpha-tocopherol, 2H-1-Benzopyran-6-ol,3,4-dihydro-2,5,7,8-tetramethyl-2-(4,8,12-Trimethyltridecyl); IRGAFOS ® 168 (mixture containing Tris(2,4-di-tert-butylphenyl)phosphate); ADDITIN® RC7130 (N-phenyl-1-naphthylamine); Na-LUBE® A0142 (liquid diphenylamine-based antioxidant); VANLUBE® 961 ( mixture of octylated and butylated diphenylamine or benzolamine, N-Phenyl, reaction product of 2,4-trimethylpentane and 2-methylpropene); VANLUBE® PCX (mixture containing 1-hydroxy-4-methyl-2-6-di-tert- Butylbenzol); Hexamethylenebis(3,5-di-tert-butyl-4-Hydroxyhydrocinnamto); Irgafox® 168; reaction product of N-Phenylbenzolamine with 2,4,4-Trimethylpentene; Thiodiethylenbis(3,5-di-tert- butyl-4-hydroxyhydro-cinnamatomethane); Bis(4-(1,1,3,3-tetramethylbutyl)phenyl)amine; 3,5-Bis(1,1-dimethylethyl)-4-hydroxyester; thiodi-2,1 - ethanediyl ester.

[036] In addition, the high temperature oil or the anti-corrosion additive contains metallic deactivators or ion complexing agents. These include triazoles, imidazoline, N-methylglycine (Sarcosine), benzotriazole derivative, N,N-Bis(2-ethylhexyl)-ar-methyl-1H-benzotriazole-1-methanamine; n-Methyl-N(1-oxo-9-octadecenyl)glycine, mixture of phosphoric acid and mono- and diisooctylester reacted with (C11-14)-alkylamines, mixture of phosphoric acid and mono-and Diisooctylester reacted with tert-alkylamine and (C12-14)-primary amines, dodecanoic acid, triphenylphosphorthionate and aminophosphates. Commercially available additives are as follows: IRGAMET® 39, IRGACOR® DSS G, Amin O; SARKOSYL® O (Ciba), COBRATEC® 122, CUVAN® 303, VANLUBE® 9123, Cl-426, Cl-426EP, Cl-429 and Cl-498.

[037] Other conceivable anti-wear additives are amines, amine phosphates, phosphates, thiophosphates, phosphorthionates and mixtures of these components. The commercially available anti-wear additives IRGALUBE® TPPT, IRGALUBE® 232, IRGALUBE® 349, IRGALUBE® 211 and ADDITIN® RC3760 Liq 3960, FIRC-SHUN® FG 1505 and FG 1506, NA-LUBE® KR-015FG, LUBEBOND ®, FLUORO® FG, SYNALOX® 40-D, ACHESON® FGA 1820 and ACHESON® FGA 1810.

[038] In addition, the oil or grease may contain food-compatible solid lubricants such as PTFE, BN, Na pyrophosphate, Zn oxide, Mg oxide, Zn pyrophosphate, Na thiosulfate, Mg carbonate, carbonate of Ca, Ca stearate, Zn sulfite or a mixture thereof.

[039] Practical tests have shown that the high temperature oil or grease according to the invention up to a temperature of 250 °C does not exhibit any or negligible decomposition events. Here it is understood that less than 10% of the lubricant decomposes.

[040] The high temperature lubricating oil or grease according to the invention may contain, as another food-compatible base oil, an oil, preferably selected from the group consisting of mineral oil, aliphatic carboxylic acid esters and acid esters. dicarboxylic acid, fatty acid triglycerides and/or poly-alpha-olefins.

[041] In a special embodiment, the high temperature oil according to the invention or grease contains a stolide, preferably the main components of the stolide are obtained by chemical and enzymatic processes starting from native oils of the sunflower oil group. , rapeseed oil, castor oil, , linseed oil, corn oil, safflower oil, soybean oil, linseed oil, peanut oil, "Lesqueralle" oil, palm oil, olive oil or mixtures of the aforementioned oils .

[042] Practical tests have shown that the high temperature oil or grease according to the invention, due to its excellent physical and chemical properties, is used for lubricating work tools for food processing. Due to its good temperature resistance it can also be used under high application temperatures of up to 260°C, preferably under temperatures of 150 to 250°C, for example oven currents.

[043] The invention also relates to a method of manufacturing the above-described high temperature oil or grease in which the base oils and additives are mixed together.

[044] The invention will now be clarified on the basis of the following examples in more detail.

Examples 1 to 7

[045] Manufacture of a high temperature oil according to the invention for the food industry.

[046] Two esters of trimellitic acid are placed in a mixing vessel. Under 100°C the polyisobutylene and if necessary another oil are added with stirring. Then the mixture is stirred for 1 hour in order to obtain a homogeneous mixture. The anti-wear agent and the antioxidant agent are added at 60°C under stirring in the vessel. After ca. 1 hour the ready oil can be placed in the intended container.

[047] High temperature oil composition:

4 = Resíduo após evaporação completa muito dissolúvel 3 = Resíduo após evaporação completa bastante dissolúvel 2 = Resíduo após evaporação completa parcialmente dissolúvel 1 = Resíduo após evaporação completa não dissolúvel[048] Table 1 shows the oil compositions for high temperature and the resolubility of the oil residue after complete evaporation of the oil as a function of the added amount of polysobutylenes.

4 = Residue after complete evaporation very soluble 3 = Residue after complete evaporation quite soluble 2 = Residue after complete evaporation partially soluble 1 = Residue after complete evaporation not soluble

[049] All data are in % by weight. The residue at 100% by weight results from the addition of additives, especially amine and/or phenolic antioxidants, anti-corrosion additives, EP/AW anti-wear additives as well as metal deactivators.

[050] These results show that it is possible up to a kinematic viscosity at 40°C of 292.7 mm2/s, to dissolve the residues formed after complete evaporation again with fresh oil. The composition according to example 1 shows the improved properties with respect to viscosity and redissolubility.

[051] The following examples 8 to 10 show, in comparison with comparative examples 1 to 3, the extraordinary properties of the high temperature oil according to the food-compatible invention with respect to dissolution if different components are used a) as oil .

Examples 8 to 10

[052] Composition of oils (all data are in % by weight)

[053] In table 5, greases according to the invention compatible with high temperature food are described below by way of example.

[054] To determine redissolubility the samples were quenched at 250°C for 72 hours. The residue was redissolved with the respective base oil from the grease sample. In all examples the redissolubility is very good.

[055] In the case of the thickeners used in examples 11 to 16, it is a Li complex (Ex. 11 and 12), Al complex (Ex. 13), Bentonite (Ex. 14), simple Ca (Ex. 15) , simple Li (Ex. 16) and urea (Ex. 17). Continuation of Table 5

4 = Resíduo após evaporação completa muito dissolúvel 3 = Resíduo após evaporação completa bastante dissolúvel 2 = Resíduo após evaporação completa parcialmente dissolúvel 1 = Resíduo após evaporação completa não dissolúvel[056] In addition, the redissolubility of the oil residue after complete evaporation in the case of two different temperatures (220°C/120h) and (250°C/72h) was analyzed as a function of the mixing ratio of both trimellitic acid esters (1 and 2). The concentration of the fully hydrogenated PIB was kept constant at 25% by weight. It was surprisingly found that at both temperatures the redissolubility depends on the mixing ratio of both trimellitic acid esters. In the case of a mixing ratio of 0.02, i.e. a high ratio of the trimellitic acid iso-C13-ester to the C10-iso-ester, the residue cannot be redissolved with fresh oil but the dissolution increases with increasing content of iso-C10-trimelitic acid ester, as can be seen in figure 1. In the case of a mixing ratio of 1:1, a saturation point is reached. The values are also shown in Table 6.

4 = Residue after complete evaporation very soluble 3 = Residue after complete evaporation quite soluble 2 = Residue after complete evaporation partially soluble 1 = Residue after complete evaporation not soluble

[057] It was possible to verify that the solubility of the residues depends not only on the degree of hydrogenation of the polyisobutylene, but also on the mixing ratio of both esters. Both esters must be used in combination to ensure the H1 capability of the oil for high temperatures. The mix ratios are freely selectable, from a 1:1 mix the preferred tracks start. The ratio of 87.12 (iso-C10/iso-C13) is especially preferred.

[058] The high temperature oil and high temperature grease described above can also be used for the lubrication of work tools, similar restrictions are subject to lubricant requirements. This includes the pharmaceutical and cosmetics industry as well as the animal feed industry.

[059] With regard to the food industry, the high temperature lubricants according to the invention can be used for the lubrication of work tools in the case of food processing, such as hydraulic oils for the food industry, for conveyor and control chains in the food industry as well as for devices for processing cereals, flour and animal feed as well as for ovens.

[060] In the case of some applications, the use in the form of a spray is advantageous.

Claims (8)

1. Food grade high temperature oil characterized in that it comprises the following components: a) 93.9 to 45% by weight of at least one oil selected from the group consisting of stolides; b) 6 to 45% by weight of a polymer selected from the group consisting of a hydrogenated or 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 anti-corrosion additives, antioxidants, anti-wear additives, UV stabilizers, inorganic or organic solid lubricants. 2. High temperature food grade fat characterized in that it comprises the following components: a) 91.9 to 30% by weight of at least one oil selected from the group consisting of stolides; b) 6 to 45% by weight of a polymer selected from the group consisting of a hydrogenated or 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 anti-corrosion additives, antioxidants, anti-wear additives, UV stabilizers, inorganic or organic solid lubricants; and d) 2 to 20% by weight of thickener. 3. High temperature food grade oil, according to claim 1, characterized in that component a) comprises as another food grade oil a compound selected from the group consisting of mineral oil, aliphatic acid esters carboxylic and dicarboxylic acids, fatty acid triglycerides and poly-alpha-olefins. 4. High temperature food grade fat, according to claim 2, characterized in that component a) comprises as another food grade oil a compound selected from the group consisting of mineral oil, aliphatic acid esters carboxylic and dicarboxylic acids, fatty acid triglycerides and poly-alpha-olefins. 5. High temperature food grade fat according to claim 2, characterized in that component d) is selected from the group consisting of urea, Al complex soaps, simple metal soaps of the elements of first and second main groups of the periodic table, soaps of metal complexes 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. 6. Use of food grade oil for high temperature, as defined in any of claims 1 and 3, characterized in that it is for the lubrication of equipment in food processing. 7. Use of high temperature food grade fat, as defined in any one of claims 2, 4 and 5, characterized in that it is for lubrication of equipment in food processing. 8. Use of high temperature oil, as defined in any one of claims 1, 3 and 6, characterized in that it is like oil in the form of a spray.

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