Low pour point lubricant base stock

Abstract

Disclosed is a lubricant base stock, exhibiting a combination of high flash point, low evaporation loss, high viscosity and unexpectedly exceptionally low pour point and high viscosity index value. Said lubricant base stock comprises at least one ester between 2-propylheptanoic acid and at least one 2,2-substituted 1,3-propanediol and/or at least one dimer, trimer or polymer thereof and/or at least one alkoxylated species of a said 2,2-substituted 1,3-propanediol or a said dimer, trimer or polymer thereof.

1 : A lubricant base stock comprising:
 at least one ester obtained by esterifying 2-propylheptanoic acid with at least one selected from the group consisting of a 2,2-substituted 1,3-propanediol, a dimer of the 2,2-substituted 1,3-propanediol, a trimer of the 2,2-substituted 1,3-propanediol, a polymer of the 2,2-substituted 1,3-propanediol, an alkoxylated species of the 2,2-substituted 1,3-propanediol, an alkoxylated species of the dimer of the 2,2-substituted 1,3-propanediol, an alkoxylated species of the trimer of the 2,2-substituted 1,3-propanediol, and an alkoxylated species of the polymer of the 2,2-substituled 1,3-propanediol,   wherein the lubricant base stock is an automotive, an aeronautic, a marine or a stationary engine or turbine lubricant base stock.   
     
     
         2 : The lubricant base stock of  claim 1 ,
 wherein the 2,2-substituted 1,3-propanediol is present and comprises a 2,2-dialkyl-1,3-propanediol, a 2-alkyl-2-hydroxyalkyl-1,3-propanediol, or a 2,2-dihydroxyalkyl-1,3-propanediol.   
     
     
         3 : The lubricant base stock of  claim 2 , wherein the alkyl is a C 1 -C 8  alkyl. 
     
     
         4 : The lubricant base stock of  claim 1 , wherein the 2,2-substituted 1,3-propanediol is present and comprises neopentyl glycol, 2-butyl-2-ethyl-1,3-propanediol, trimethylolethane, trimethylolbutane, trimethylolpropane, or pentaerythritol. 
     
     
         5 : The lubricant base stock of  claim 1 , wherein the dimer is present and comprises di-trimethylolpropane or di-pentaerythritol. 
     
     
         6 : The lubricant base stock of  claim 1 , wherein the alkoxylated species is present and comprises an ethoxylated trimethylolethane, propoxylated trimethylolethane, an ethoxylated and propoxylated trimetholethane, trimethylolpropane, trimethylolbutane, pentaerythritol, di-trimethylolpropane, or di-pentaerythritol. 
     
     
         7 : The lubricant base stock of  claim 2 , wherein the at least one ester comprises a triester of a 2-alkyl-2-hydroxyalkyl-1,3-propanediol or a tetraester of a dimer of a 2-alkyl-2-hydroxyalkyl-1,3-propanediol. 
     
     
         8 : The lubricant base stock of  claim 2 , wherein the at least one ester comprises a tetraester of a 2,2-dihydroxyalkyl-1,3-propanediol. 
     
     
         9 : The lubricant base stock of  claim 4 , wherein the at least one ester comprises a triester of trimethylolpropane, a tetraester of pentaerythritol, or a tetraester of di-trimethylolpropane. 
     
     
         10 : A method of producing a lubricant for at least one of an internal combustion engine and a turbine engine, the method comprising combining the lubricant base stock of  claim 1  with the lubricant. 
     
     
         11 : The method of  claim 10 , wherein the lubricant is suitable for an engine which is an automotive engine, an aeronautic engine, a marine engine, or a stationary engine. 
     
     
         12 : The method of  claim 10 , wherein the lubricant is suitable for an engine which is an otto, a diesel, a wankel or a jet engine. 
     
     
         13 : The method of  claim 10 , wherein the lubricant is suitable for an engine which is a 2-stroke engine. 
     
     
         14 : The method of  claim 10 , wherein the lubricant base stock comprises a least one selected from the group consisting of a triester of trimethylolpropane, a tetraester of pentaerythritol, and a tetraester of di-trimethylolpropane. 
     
     
         15 : The lubricant base stock of  claim 2 , wherein the 2,2-substituted 1,3-propanediol is present and comprises neopentyl glycol, 2-butyl-2-ethyl-1,3-propanediol, trimethylolethane, trimethylolbutane, trimethylolpropane, or pentaerythritol. 
     
     
         16 : The lubricant base stock of  claim 3 , wherein the 2,2-substituted 1,3-propanediol is present and comprises neopentyl glycol, 2-butyl-2-ethyl-1,3-propanediol, trimethylolethane, trimethylolbutane, trimethylolpropane, or pentaerythritol. 
     
     
         17 : The lubricant base stock of  claim 3 , wherein the at least one ester comprises a triester of a 2-alkyl-2-hydroxyalkyl-1,3-propanediol or a tetraester of a dimer of a 2-alkyl-2-hydroxyalkyl-1,3-propanediol. 
     
     
         18 : The lubricant base stock of  claim 4 , wherein the at least one ester comprises a triester of a 2-alkyl-2-hydroxyalkyl-1,3-propanediol or a tetraester of a dimer of a 2-alkyl-2-hydroxyalkyl-1,3-propanediol. 
     
     
         19 : The lubricant base stock of  claim 5 , wherein the at least one ester comprises a triester of a 2-alkyl-2-hydroxyalkyl-1,3-propanediol or a tetraester of a dimer of a 2-alkyl-2-hydroxyalkyl-1,3-propanediol. 
     
     
         20 : The lubricant base stock of  claim 6 , wherein the at least one ester comprises a triester of a 2-alkyl-2-hydroxyalkyl-1,3-propanediol or a tetraester of a dimer of a 2-alkyl-2-hydroxyalkyl-1,3-propanediol.