High temperature lubricant

Abstract

The invention relates to a food-compatible high-temperature lubricant, more particularly a high-temperature oil and a high-temperature grease, comprising the following components: a) at least one oil selected from a trimellitic ester or a mixture of different trimellitic esters, alkylaromatics, preferably an aliphatically substituted naphthalene, or estolides; b) a hydrogenated or fully hydrogenated polyisobutylene or a mixture of hydrogenated or fully hydrogenated polyisobutylene; and c) additives individually or in combination. In the case of the high-temperature grease, a thickener is added.

1 . High-temperature oil comprising
 a) 93.9 to 45 wt % of at least one oil selected from the group consisting of alkylaromatics, estolides, trimellitic esters, or a mixture of different trimellitic esters wherein the alcohol group of the ester is a linear or branched alkyl group having 8 to 16 carbon atoms;   b) 6 to 45 wt % of a polymer, specifically a hydrogenated or fully hydrogenated polyisobutylene, or a mixture of hydrogenated or fully hydrogenated polyisobutylene;   c) 0.1 to 10 wt % of additives, individually or in combination, selected from the group consisting of anticorrosion additives, antioxidants, antiwear additives, UV stabilizers, inorganic or organic solid lubricants.   
     
     
         2 . High-temperature oil according to  claim 1 , wherein the oil component comprises as a further oil a compound selected from the group consisting of mineral oil, aliphatic carboxylic and dicarboxylic esters, fatty acid triglycerides, pyromellitic esters, diphenyl ethers, phloroglucinol esters and/or poly-alpha-olefins, alpha-olefin copolymers. 
     
     
         3 . High-temperature grease comprising
 a) 91.9 to 25 wt % of at least one oil selected from the group consisting of alkylaromatics, estolides, trimellitic esters, or a mixture of different trimellitic esters wherein the alcohol group of the ester is a linear or branched alkyl group having 8 to 16 carbon atoms;   b) 6 to 45 wt % 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 10 wt % of additives, individually or in combination, selected from the group consisting of anticorrosion additives, antioxidants, antiwear additives, UV stabilizers, inorganic or organic solid lubricants, and   d) 2 to 20 wt % of thickener.   
     
     
         4 . High-temperature grease according to  claim 3 , wherein the oil component comprises as a further oil a compound selected from the group consisting of mineral oil, aliphatic carboxylic and dicarboxylic esters, fatty acid triglycerides, pyromellitic esters, diphenyl ethers, phloroglucinol esters and/or poly-alpha-olefins, alpha-olefin copolymers. 
     
     
         5 . High-temperature grease according to  claim 3 , wherein the thickener is selected from the group consisting of urea, Al complex soaps, simple metal 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 aforesaid thickeners. 
     
     
         6 . High-temperature oil or high-temperature grease according to  claim 1 , wherein the alkylaromatic compound is an aliphatically substituted naphthalene. 
     
     
         7 . Use of the high-temperature oil according to  claim 1  for the lubrication of roller bearings and plain bearings, in vehicle technology, in conveying technology, in mechanical engineering, in office technology, and in industrial plants and machines, but also in the areas of household appliances, of consumer electronics, and for the lubrication of chains, chain rollers, and belts of continuous presses. 
     
     
         8 . High-temperature oil or high-temperature grease according to  claim 3 , wherein the alkylaromatic compound is an aliphatically substituted naphthalene. 
     
     
         9 . Use of the high-temperature grease according to  claim 3  for the lubrication of roller bearings and plain bearings, in vehicle technology, in conveying technology, in mechanical engineering, in office technology, and in industrial plants and machines, but also in the areas of household appliances, of consumer electronics, and for the lubrication of chains, chain rollers, and belts of continuous presses.