Modified hydrogen-based lubricants

Abstract

The present invention related to a process for the manufacture of hydrogen-based lubricants modified with per(halo)fluorinated aromatic compounds, to the modified lubricants thereby obtained and to the use of the modified lubricants for the preparation of lubricant compositions.

1 . A process for the addition of a hydrogen-based lubricant to a per(halo)fluorinated aromatic compound, said process comprising reacting, via a radical reaction, a hydrogen-based lubricant (R H ) with a per(halo)fluorinated aromatic compound (F) to provide a compound (A) comprising at least one per(halo)fluorinated cyclic group (F′) having at least one lubricant chain (R HC ) bound thereto, said group (F′) optionally containing conjugated or non-conjugated double bonds. 
     
     
         2 . The process according to  claim 1 , wherein lubricant (R H ) is one or more lubricant having a viscosity ranging from 2 to 1,000,000 cSt and containing straight or branched hydrocarbon moieties. 
     
     
         3 . The process according to  claim 2 , wherein lubricant (R H ) is in the liquid or in the semi-solid form at room temperature. 
     
     
         4 . The process according to  claim 3 , wherein lubricant (R H ) is in the liquid form and is selected from one or more mineral oils of hydrocarbon type, animal or vegetable oils, synthetic oils, polyalphaolefins (PAOs), dibasic acid esters, polyol esters, phosphate esters, polyesters, alkylated naphthalenes, polyphenyl ethers, polybutenes, multiply-alkylated cyclopentanes, silane hydrocarbons, siloxanes and polyalkylene glycols. 
     
     
         5 . The process according to  claim 4 , wherein oil (R H ) is a mineral oil of hydrocarbon type or a polyalphaolefin. 
     
     
         6 . The process according to  claim 1 , wherein the radical reaction is initiated by contacting lubricant (R H ) and compound (F) with organic or inorganic peroxides, redox systems, ozone, hydrogen peroxide or by thermal or photochemical decomposition of lubricant (R H ). 
     
     
         7 . The process according to  claim 6 , wherein the organic peroxide is benzoyl peroxide or di-ter-butyl peroxide. 
     
     
         8 . The process according to  claim 1 , which is carried out in the absence of solvents. 
     
     
         9 . The process according to  claim 1 , wherein compound (F) is selected from perfluorobenzene, perfluorobiphenyl, perfluoronaphthalene, perfluoroanthracene, perfluoropyridine, perfluorotoluene and derivatives thereof comprising one or more perfluorinated substituent(s). 
     
     
         10 . The process according to  claim 9 , wherein compound (F) is selected from perfluorobenzene and perfluorobiphenyl. 
     
     
         11 . An addition compound (A) comprising at least one per(halo)fluorinated cyclic group (F′) having at least one hydrogen-based lubricant chain (R HC ) bound thereto, said group (F′) optionally containing conjugated or non-conjugated double bonds. 
     
     
         12 . A method for lubricating an item, the method comprising contacting the item with compound (A) as claimed in  claim 11 . 
     
     
         13 . A method for manufacturing a lubricant composition comprising adding compound (A) as claimed in  claim 11  to at least one further ingredient or additive. 
     
     
         14 . A lubricant composition comprising compound (A) as claimed in  claim 11  in admixture with at least one further ingredient or additive.