Low Viscosity/Low Volatility Lubricant Oil Compositions Comprising Alkylated Naphthalenes

Abstract

Provided herein is are low viscosity, low volatility lubricant oil compositions comprising a first base oil component comprising, for example, alkylated naphthalenes, and a second base oil component wherein the composition has a kinematic viscosity at 100° C. of 7.6 cSt or less, a Noack volatility at 250° C. of less than 10%, and a viscosity index of at least 90 for use as internal combustion engine oils, such as compression- and spark-ignition engine oils.

What is claimed is: 
     
         1 . A lubricant oil composition comprising
 (a) a first base oil component in the amount of 1 weight % to 50 weight % based on the total weight of the oil composition, wherein the first base oil component comprises a compound of Formula (I)   
       
         
           
           
               
               
           
         
         
            wherein R is (C 18 -C 40 )alkyl, (C 5 -C 40 )cycloalkyl, (C 5 -C 40 )aryl, (C 7 -C 9 )aralkyl; wherein the aralkyl is optionally substituted with (C 1 -C 36 )alkyl, or (C 6 -C 40 )alkenyl; and 
         
         (b) a second base oil component in the amount of 0.1 weight % to 80 weight % based on the total weight of the oil composition, wherein the second base oil component comprises one or more of a polyalphaolefin (PAO) base stock, Group II base stock, Group III base stock, Group V base stock, GTL base stock, alkylated benzene base stock, and ester base stock; 
       
       wherein the composition has a kinematic viscosity at 100° C. of 7.6 cSt or less, a Noack volatility at 250° C. of less than 10%, and a viscosity index of at least 90. 
     
     
         2 . The lubricant oil composition of  claim 1 , wherein the second base oil component comprises a polyalphaolefin (PAO) base stock. 
     
     
         3 . The lubricant oil composition of  claim 1 , wherein the second base oil component comprises Group II base stock. 
     
     
         4 . The lubricant oil composition of  claim 1 , wherein the second base oil component comprises Group III base stock. 
     
     
         5 . The lubricant oil composition of  claim 1 , wherein the second base oil component comprises Group V base stock. 
     
     
         6 . The lubricant oil composition of  claim 1 , wherein the second base oil component comprises GTL base stock. 
     
     
         7 . The lubricant oil composition of  claim 1 , wherein the second base oil component comprises alkylated benzene base stock. 
     
     
         8 . The lubricant oil composition of  claim 1 , wherein the second base oil component comprises ester base stock. 
     
     
         9 . The lubricant oil composition of any one of  claims 1 - 8 , wherein first base oil component has a kinematic viscosity at 100° C. of equal or less than 7.0 cSt, a Noack volatility at 250° C. of less than 8%, and a viscosity index equal or higher than 80. 
     
     
         10 . The lubricant oil composition of any one of  claims 1 - 9 , wherein the composition has a kinematic viscosity at 100° C. of 6.0 cSt or less. 
     
     
         11 . The lubricant oil composition of any one of  claim 1 ,  9 , or  10 , wherein the kinematic viscosity is determined by ASTM D445. 
     
     
         12 . The lubricant oil composition of any one of  claim 1 ,  9 , or  10 , wherein the Noack volatility is determined by ASTM D5800. 
     
     
         13 . The lubricant oil composition of any one of  claim 1 ,  9 , or  10 , wherein the Noack volatility is determined by ASTM D2270. 
     
     
         14 . The lubricant oil composition of any one of  claims 1 - 13 , wherein R is (C 18 -C 32 )alkyl. 
     
     
         15 . The lubricant oil composition of any one of  claims 1 - 14 , wherein R is (C 20 -C 24 )alkyl. 
     
     
         16 . The lubricant oil composition of any one of  claims 1 - 14 , wherein R is C 18  alkyl. 
     
     
         17 . The lubricant oil composition of any one of  claims 1 - 15 , wherein R is C 20  alkyl. 
     
     
         18 . The lubricant oil composition of any one of  claims 1 - 14 , wherein R is C 32  alkyl. 
     
     
         19 . The lubricant oil composition of any one of  claims 1 - 10 , wherein the first base oil component comprises a mixture of two or more compounds of Formula (I), wherein at least one compound is a compound of Formula (I), wherein R is a C 20  alkyl and at least one compound is a compound of Formula (I), wherein R is a C 24  alkyl. 
     
     
         20 . The lubricant oil composition of any one of  claims 1 - 10 , wherein the first base oil component comprises a mixture of two or more compounds of Formula (I), wherein at least one compound is a compound of Formula (I), wherein R is a C 18  alkyl and at least one compound is a compound of Formula (I), wherein R is a (C 20 -C 24 )alkyl. 
     
     
         21 . The lubricant oil composition of any one of  claims 1 - 14 , wherein R is (C 18 -C 32 ) Guerbet alkyl. 
     
     
         22 . The lubricant oil composition of any one of  claims 1 - 14  and  21 , wherein R is C 18  Guerbet alkyl. 
     
     
         23 . The lubricant oil composition of any one of  claims 1 - 14  and  21 , wherein R is C 20  Guerbet alkyl. 
     
     
         24 . The lubricant oil composition of any one of  claims 1 - 14  and  21 , wherein R is C 24  Guerbet alkyl. 
     
     
         25 . The lubricant oil composition of any one of  claims 1 - 14  and  21 , wherein R is C 28  Guerbet alkyl. 
     
     
         26 . The lubricant oil composition of any one of  claims 1 - 14  and  21 , wherein R is C 32  Guerbet alkyl. 
     
     
         27 . The lubricant oil composition of any one of  claims 1 - 26 , wherein the lubricant oil composition further comprises one or more additives, wherein each additive independently is a detergent, a dispersant, an antioxidant, a pour point depressant, a VI improver, an anti-wear agent, an extreme pressure additive, a friction modifier, a demulsifier, an antifoamant, a corrosion inhibitor, a seal swell control additive, or a metal deactivator. 
     
     
         28 . The lubricant oil composition of any one of  claims 1 - 27 , wherein the lubricant oil composition further comprises one or more additives, wherein each additive independently is a detergent, a dispersants, an antioxidant, an anti-wear agent, or a VI improver. 
     
     
         29 . The lubricant oil composition of any one of  claims 1 - 28 , wherein the lubricant oil composition has one or more of the following properties selected from the group consisting of oxidation resistance, swell characteristics, deposit performance, reserve alkalinity, rust preventing quality, and levels of ash-forming compound, improved as compared to an oil composition comprising the second base oil component, but not comprising the first base oil component. 
     
     
         30 . An internal combustion engine oil comprising a lubricant oil composition of any one of  claims 1 - 28 . 
     
     
         31 . A compression-ignition engine oil comprising a lubricant oil composition of any one of  claims 1 - 28 . 
     
     
         32 . A spark-ignition engine oil comprising a lubricant oil composition of any one of  claims 1 - 28 . 
     
     
         33 . A method of improving fuel efficiency in an internal combustion engine by lubricating said engine with a lubricant oil composition of any one of  claims 1 - 25 , wherein the fuel efficiency is improved as compared to fuel efficiency achieved by lubricating said engine with an oil composition comprising the second base oil component, but not comprising the first base oil component. 
     
     
         34 . A method of improving oxidation resistance, swell characteristics, deposit performance, reserve alkalinity, rust preventing quality, or levels of ash-forming compounds of a lubricating oil composition by mixing a first base oil component of any one of  claim 1 ,  9 , or  14 - 26  with a second base oil component of any one of  claims 1 - 8  and optionally one or more additives, wherein said oxidation resistance, swell characteristics, deposit performance, reserve alkalinity, rust preventing quality, or levels of ash-forming compound of a lubricating oil composition are improved as compared to an oil composition comprising the second base oil component, but not comprising the first base oil component.