Ester oils

Abstract

According to a first aspect, an ester oil, in particular for producing a hydraulic fluid and/or a lubricant, containing an esterification product from the esterification of at least one monoalcohol with at least one polycarboxylic acid, is characterized in that the monoalcohol and/or the polycarboxylic acid originates from renewable raw materials. According to a second aspect, an ester oil, in particular for producing a hydraulic fluid and/or a lubricant, containing an esterification product from the esterificati-on of at least one monocarboxylic acid with at least one dialcohol, is characterized in that the dialcohol and/or the monocarboxylic acid originates from renewable raw materials.

1 - 45 . (canceled) 
     
     
         46 . An ester oil, especially for production of a hydraulic oil and/or of a lubricant, comprising an esterification product of at least one unbranched monoalcohol with at least one polycarboxylic acid, characterized in that the unbranched monoalcohol and/or the polycarboxylic acid originates from renewable raw materials. 
     
     
         47 . The ester oil as claimed in  claim 46 , characterized in that the polycarboxylic acid originates from renewable raw materials. 
     
     
         48 . The ester oil as claimed in  claim 46 , characterized in that the polycarboxylic acid is saturated. 
     
     
         49 . The ester oil as claimed in  claim 46 , characterized in that the polycarboxylic acid is unbranched. 
     
     
         50 . The ester oil as claimed in  claim 46 , characterized in that the polycarboxylic acid is branched. 
     
     
         51 . The ester oil as claimed in  claim 46 , characterized in that the polycarboxylic acid has 6-13 carbon atoms, preferably 8-13 carbon atoms. 
     
     
         52 . The ester oil as claimed in  claim 46 , characterized in that the polycarboxylic acid comprises a dicarboxylic acid. 
     
     
         53 . The ester oil as claimed in  claim 52 , characterized in that the dicarboxylic acid comprises adipic acid, trimethyladipic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid and/or brassylic acid. 
     
     
         54 . The ester oil as claimed in  claim 46 , characterized in that the at least one monoalcohol originates from renewable raw materials. 
     
     
         55 . The ester oil as claimed in  claim 46 , characterized in that the at least one monoalcohol is saturated. 
     
     
         56 . The ester oil as claimed in  claim 46 , characterized in that the at least one monoalcohol has 6-24, preferably 8-16, carbon atoms, and the at least one monoalcohol more preferably has 9, 11, 12, 14 and/or 16 carbon atoms. 
     
     
         57 . The ester oil as claimed in  claim 46 , characterized in that the at least one monoalcohol is a fatty alcohol. 
     
     
         58 . The ester oil as claimed in  claim 46 , characterized in that the at least one monoalcohol comprises 1-nonanol, n-undecanol, 1-dodecanol, 1-tetradecanol and/or cetyl alcohol. 
     
     
         59 . The ester oil as claimed in  claim 46 , characterized in that the esterification product, based on the carbon content, is formed to an extent of at least 50 mol %, preferably at least 60 mol %, even further preferably at least 70 mol %, from renewable raw materials. 
     
     
         60 . The ester oil as claimed in  claim 46 , characterized in that a molecular weight of the esterification product is at least 400 g/mol, especially 550 g/mol. 
     
     
         61 . The ester oil as claimed in  claim 46 , characterized in that the esterification product has at least 30 carbon atoms and/or at most 50 carbon atoms. 
     
     
         62 . The use of an ester oil as claimed in  claim 46  as a lubricant and/or hydraulic oil. 
     
     
         63 . A lubricant and/or hydraulic oil comprising an ester oil as claimed in  claim 46 . 
     
     
         64 . The lubricant and/or hydraulic oil as claimed in  claim 63 , characterized in that the proportion of ester oil is at least 50% by weight, preferably at least 75% by weight, further preferably at least 90% by weight, of the total weight of the lubricant and/or hydraulic oil. 
     
     
         65 . The lubricant and/or hydraulic oil as claimed in  claim 63 , characterized in that additives are present, the additives present being antioxidants, antiwear additives, metal deactivators, corrosion inhibitors and/or antifoams. 
     
     
         66 . A process for preparing an ester oil, especially for use in a hydraulic oil and/or a lubricant, by reacting an unbranched monoalcohol with a polycarboxylic acid to give an ester oil, characterized in that the unbranched monoalcohol and/or the polycarboxylic acid originate from renewable raw materials. 
     
     
         67 . The process as claimed in  claim 66 , characterized in that the alcohols and/or carboxylic acids are prepared from fatty acids from renewable raw materials. 
     
     
         68 . An ester oil, especially for production of a hydraulic oil and/or of a lubricant, comprising an esterification product of at least one branched monoalcohol with at least one polycarboxylic acid, characterized in that the branched monoalcohol and/or the polycarboxylic acid originates from renewable raw materials and the at least one branched monoalcohol has a terminal iso branch. 
     
     
         69 . The ester oil as claimed in  claim 68 , characterized in that the polycarboxylic acid originates from renewable raw materials. 
     
     
         70 . The ester oil as claimed in  claim 68 , characterized in that the polycarboxylic acid is saturated. 
     
     
         71 . The ester oil as claimed in  claim 68 , characterized in that the polycarboxylic acid is unbranched. 
     
     
         72 . The ester oil as claimed in  claim 68 , characterized in that the polycarboxylic acid is branched. 
     
     
         73 . The ester oil as claimed in  claim 68 , characterized in that the polycarboxylic acid has 6-13 carbon atoms, preferably 8-13 carbon atoms. 
     
     
         74 . The ester oil as claimed in  claim 68 , characterized in that the polycarboxylic acid comprises a dicarboxylic acid. 
     
     
         75 . The ester oil as claimed in  claim 74 , characterized in that the dicarboxylic acid comprises adipic acid, trimethyladipic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid and/or brassylic acid. 
     
     
         76 . The ester oil as claimed in  claim 68 , characterized in that the at least one monoalcohol originates from renewable raw materials. 
     
     
         77 . The ester oil as claimed in  claim 68 , characterized in that the at least one monoalcohol is saturated. 
     
     
         78 . The ester oil as claimed in  claim 68 , characterized in that the at least one monoalcohol has 6-24, preferably 8-16, carbon atoms, and the at least one monoalcohol more preferably has 9, 11, 12, 14 and/or 16 carbon atoms. 
     
     
         79 . The ester oil as claimed in  claim 68 , characterized in that the at least one monoalcohol is a fatty alcohol. 
     
     
         80 . The ester oil as claimed in  claim 68 , characterized in that the at least one monoalcohol comprises methyltetradecanol. 
     
     
         81 . The ester oil as claimed in  claim 68 , characterized in that the esterification product, based on the carbon content, is formed to an extent of at least 50 mol %, preferably at least 60 mol %, even further preferably at least 70 mol %, from renewable raw materials. 
     
     
         82 . The ester oil as claimed in  claim 68 , characterized in that a molecular weight of the esterification product is at least 400 g/mol, especially 550 g/mol. 
     
     
         83 . The ester oil as claimed in  claim 68 , characterized in that the esterification product has at least 30 carbon atoms and/or at most 50 carbon atoms. 
     
     
         84 . The use of an ester oil as claimed in  claim 68  as a lubricant and/or hydraulic oil. 
     
     
         85 . A lubricant and/or hydraulic oil comprising an ester oil as claimed in  claim 68 . 
     
     
         86 . The lubricant and/or hydraulic oil as claimed in  claim 85 , characterized in that the proportion of ester oil is at least 50% by weight, preferably at least 75% by weight, further preferably at least 90% by weight, of the total weight of the lubricant and/or hydraulic oil. 
     
     
         87 . The lubricant and/or hydraulic oil as claimed in  claim 85 , characterized in that additives are present, the additives present being antioxidants, antiwear additives, metal deactivators, corrosion inhibitors and/or antifoams. 
     
     
         88 . A process for preparing an ester oil, especially for use in a hydraulic oil and/or a lubricant, by reacting a branched monoalcohol with a polycarboxylic acid to give an ester oil, characterized in that the branched monoalcohol and/or the polycarboxylic acid originate from renewable raw materials and the at least one branched monoalcohol has a terminal iso branch. 
     
     
         89 . The process as claimed in  claim 88 , characterized in that the alcohols and/or carboxylic acids are prepared from fatty acids from renewable raw materials.