High temperature lubricant for the food industry

Abstract

The invention relates to a food-grade 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 . A food-grade high-temperature oil comprising the following components:
 a) 93.9 to 45 wt % of at least one oil selected from the group consisting of a mixture of trimellitic acid tri(iso-C 10 ) esters (1) and trimellitic acid tri(iso-C 13 ) esters (2), the mixing ratio of (1) to (2) being 99:1 to 1:99, alkylaromatics, estolides;   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 5 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 . A food-grade 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-C 10 ) esters (1) and trimellitic acid tri(iso-C 13 ) esters (2), the mixing ratio of (1) to (2) being 99:1 to 1:99, alkylaromatics, estolides;   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 5 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.   
     
     
         3 . The high-temperature oil or grease as claimed in  claim 1 , wherein the alkylaromatic compound is an aliphatically substituted naphthalene. 
     
     
         4 . The high-temperature oil or grease as claimed in  claim 1 , wherein component a) comprises as a further food-grade oil a compound selected from the group consisting of mineral oil, aliphatic carboxylic and dicarboxylic esters, fatty acid triglycerides, and poly-alpha-olefins. 
     
     
         5 . The high-temperature grease as claimed in  claim 2 , wherein component d) 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 . The use of the high-temperature oil and/or high-temperature grease as claimed in  claim 1  for the lubrication of equipment in food processing, as a hydraulic oil in the food industry, for transport chains and control chains, for devices for the processing of cereal, flour, and animal feed, and also in baking ovens. 
     
     
         7 . The use of the high-temperature oil as claimed in  claim 1  as oil in the form of a spray. 
     
     
         8 . The high-temperature oil or grease as claimed in  claim 2 , wherein the alkylaromatic compound is an aliphatically substituted naphthalene. 
     
     
         9 . The high-temperature oil or grease as claimed in  claim 2 , wherein component a) comprises as a further food-grade oil a compound selected from the group consisting of mineral oil, aliphatic carboxylic and dicarboxylic esters, fatty acid triglycerides, and poly-alpha-olefins. 
     
     
         10 . The use of the high-temperature oil and/or high-temperature grease as claimed in  claim 2  for the lubrication of equipment in food processing, as a hydraulic oil in the food industry, for transport chains and control chains, for devices for the processing of cereal, flour, and animal feed, and also in baking ovens.