US2005070450A1PendingUtilityA1

Engine oil compositions

45
Priority: Sep 30, 2003Filed: Sep 30, 2003Published: Mar 31, 2005
Est. expirySep 30, 2023(expired)· nominal 20-yr term from priority
Inventors:Stephen H. RobySusanne G. Ruelas
C10M 2207/282C10N 2030/06C10N 2030/43C10N 2040/25C10M 2215/064C10M 2229/02C10M 2207/283C10M 2205/02C10N 2030/02C10M 2215/28C10M 159/12C10M 129/74C10M 2207/028C10N 2060/00C10M 169/04C10M 2207/289C10N 2030/42C10M 2203/1006C10N 2060/06C10N 2060/14C10N 2030/08C10N 2030/04C10N 2010/04C10M 2205/0285C10M 2223/045
45
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Claims

Abstract

A lubricating oil composition comprising (a) a major amount of a base oil of lubricating viscosity and (b) a minor deposit-inhibiting effective amount of a reaction product prepared by transesterifying at least one glycerol ester and at least one non-glycerol polyol ester is provided. Methods for its use are also provided.

Claims

exact text as granted — not AI-modified
1 . A lubricating oil composition comprising (a) a major amount of a base oil of lubricating viscosity and (b) a minor deposit-inhibiting effective amount of a reaction product prepared by transesterifying at least one glycerol ester and at least one non-glycerol polyol ester.  
     
     
         2 . The lubricating oil composition of  claim 1 , wherein the glycerol ester is a mixed glycerol fatty acid ester.  
     
     
         3 . The lubricating oil composition of  claim 1 , wherein the glycerol ester is a C 4  to about C 75  glycerol fatty acid ester.  
     
     
         4 . The lubricating oil composition of  claim 1 , wherein the glycerol ester is a vegetable oil.  
     
     
         5 . The lubricating oil composition of  claim 4 , wherein the vegetable oil is selected from the group consisting of corn oil, rapeseed oil, soybean oil, and sunflower oil.  
     
     
         6 . The lubricating oil composition of  claim 5 , wherein the rapeseed oil is canola oil.  
     
     
         7 . The lubricating oil composition of  claim 1 , wherein the non-glycerol polyol ester is a trimethylolpropane ester.  
     
     
         8 . The lubricating oil composition of  claim 1 , wherein the non-glycerol polyol ester is trimethylolpropane triheptanoate.  
     
     
         9 . The lubricating oil composition of  claim 1 , wherein the glycerol ester is a vegetable oil and the non-glycerol polyol ester is a trimethylolpropane ester.  
     
     
         10 . The lubricating oil composition of  claim 1 , wherein the glycerol ester is canola oil and the non-glycerol polyol ester is trimethylolpropane triheptanoate.  
     
     
         11 . The lubricating oil composition of  claim 1  wherein the minor deposit-inhibiting effective amount of the reaction product is about 0.05 to about 10 wt. %, based on the total weight of the composition.  
     
     
         12 . The lubricating oil composition of  claim 1  wherein the minor deposit-inhibiting effective amount of the reaction product is about 0.1 to about 8 wt. %, based on the total weight of the composition.  
     
     
         13 . The lubricating oil composition of  claim 1  wherein the minor deposit-inhibiting effective amount of the reaction product is about 0.2 to about 5 wt. %, based on the total weight of the composition.  
     
     
         14 . The lubricating oil composition of  claim 10  wherein the minor deposit-inhibiting effective amount of the reaction product is about 1 to about 5 wt. %, based on the total weight of the composition.  
     
     
         15 . A lubricating oil composition comprising (a) a major amount of a base oil of lubricating viscosity and (b) a minor deposit-inhibiting effective amount of a reaction product of at least one first polyol ester of the general formula:  
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2  and R 3  are independently aliphatic hydrocarbyl moieties having 4 to about 75 carbon atoms; and at least one second polyol ester of the general formula:  
       
         
           
           
               
               
           
         
       
       wherein x and y are the same or different and are integers from 1 to 6, R 4  and R 5  are independently aliphatic hydrocarbyl moieties having 4 to 24 carbon atoms and R 6  and R 7  are independently hydrogen, an aliphatic hydrocarbyl moiety having 1 to 10 carbon atoms or  
       
         
           
           
               
               
           
         
       
       wherein z is an integer from 0 to 6 and R 8  is an aliphatic hydrocarbyl moiety having 4 to 24 carbon atoms.  
     
     
         16 . The lubricating oil composition of  claim 15  wherein the base oil of lubricating viscosity is comprised of a mineral base oil.  
     
     
         17 . The lubricating oil composition of  claim 15  wherein the base oil of lubricating viscosity is comprised of a polyalphaolefin base oil.  
     
     
         18 . The lubricating oil composition of  claim 15  wherein R 1 , R 2  and R 3  of the first polyol ester are independently selected from an aliphatic hydrocarbyl moiety having 4 to 24 carbon atoms, wherein at least one of R 1 , R 2  and R 3  is a saturated aliphatic hydrocarbyl moiety having 4 to 10 carbon atoms, and wherein at least one of R 1 , R 2  and R 3  is an aliphatic hydrocarbyl moiety having from 11 to 24 carbon atoms.  
     
     
         19 . The lubricating oil composition of  claim 18  wherein the aliphatic hydrocarbyl moiety having from 11 to 24 carbon atoms is derived from a fatty acid selected from the group consisting of oleic acid, eicosenoic acid and erucic acid.  
     
     
         20 . The lubricating oil composition of  claim 15  wherein the first polyol ester is canola oil and the second polyol ester is a trimethylolpropane (TMP) ester selected from the group consisting of TMP tri(2-ethyl hexanoate), TMP triheptanoate (TMPTH), TMP tricaprylate, TMP tricaprate, TMP tri(isononanoate) and TMP trioleate.  
     
     
         21 . The lubricating oil composition of  claim 15  wherein the first polyol ester is canola oil and the second polyol ester is TMP triheptanoate (TMPTH).  
     
     
         22 . The lubricating oil composition of  claim 15  wherein the minor deposit-inhibiting effective amount of the reaction product is about 0.05 to about 10 wt. %, based on the total weight of the composition.  
     
     
         23 . The lubricating oil composition of  claim 15  wherein the minor deposit-inhibiting effective amount of the reaction product is about 0.1 to about 8 wt. %, based on the total weight of the composition.  
     
     
         24 . The lubricating oil composition of  claim 15  wherein the minor deposit-inhibiting effective amount of the reaction product is about 0.2 to about 5 wt. %, based on the total weight of the composition.  
     
     
         25 . The lubricating oil composition of  claim 21  wherein the minor deposit-inhibiting effective amount of the reaction product is about 0.2 to about 5 wt. %, based on the total weight of the composition.  
     
     
         26 . The lubricating oil composition of  claim 15  wherein the composition has an SAE Viscosity Grade of 0W, 0W-20, 0W-30, 0W-40, 0W-50, 0W-60, 5W, 5W-20, 5W-30, 5W-40, 5W-50, 5W-60, 10W, 10W-20, 10W-30, 10W-40, 10-50, 15W, 15W-20, 15W-30 or 15W-40.  
     
     
         27 . The lubricating oil composition of  claim 15  having a phosphorous content not exceeding 0.08 wt. %, based on the total weight of the composition.  
     
     
         28 . The lubricating oil composition of  claim 20  having a phosphorous content not exceeding 0.05 wt. %, based on the total weight of the composition.  
     
     
         29 . The lubricating oil composition of  claim 27  having a sulfur content not exceeding 0.2 wt. %, based on the total weight of the composition.  
     
     
         30 . The lubricating oil composition of  claim 28  having a sulfur content not exceeding 0.2 wt. %, based on the total weight of the composition.  
     
     
         31 . The lubricating oil composition of  claim 15  further comprising at least one additive selected from the group consisting of metallic detergents, ashless dispersants, friction modifiers, extreme pressure agents, viscosity index improvers and pour point depressants such that the phosphorous content of the lubricating oil composition is no greater than 0.08 wt. % and the sulfur content of the lubricating oil composition is no greater than 0.2 wt. %, based on the total weight of the composition.  
     
     
         32 . A method of operating an internal combustion engine comprising operating the internal combustion engine with a lubricating oil composition comprising (a) a major amount of a base oil of lubricating viscosity and (b) a minor deposit-inhibiting effective amount of a reaction product of at least one first polyol ester of the general formula:  
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2  and R 3  are independently aliphatic hydrocarbyl moieties having 4 to about 75 carbon atoms; and at least one second polyol ester of the general formula:  
       
         
           
           
               
               
           
         
       
       wherein x and y are the same or different and are integers from 1 to 6, R 4  and R 5  are independently aliphatic hydrocarbyl moieties having 4 to 24 carbon atoms and R 6  and R 7  are independently hydrogen, an aliphatic hydrocarbyl moiety having 1 to 10 carbon atoms or  
       
         
           
           
               
               
           
         
       
       wherein z is an integer from 0 to 6 and R 8  is an aliphatic hydrocarbyl moiety having 4 to 24 carbon atoms.  
     
     
         33 . The method of  claim 32  wherein the base oil of lubricating viscosity is comprised of a mineral base oil.  
     
     
         34 . The method of  claim 32  wherein the base oil of lubricating viscosity is comprised of a polyalphaolefin base oil.  
     
     
         35 . The method of  claim 32  wherein R 1 , R 2  and R 3  of the first polyol ester are independently selected from an aliphatic hydrocarbyl moiety having 4 to 24 carbon atoms, wherein at least one of R 1 , R 2  and R 3  is a saturated aliphatic hydrocarbyl moiety having 4 to 10 carbon atoms, and wherein at least one of R 1 , R 2  and R 3  is an aliphatic hydrocarbyl moiety having from 11 to 24 carbon atoms.  
     
     
         36 . The method of  claim 35  wherein the aliphatic hydrocarbyl moiety having from 11 to 24 carbon atoms is derived from a fatty acid selected from the group consisting of oleic acid, eicosenoic acid and erucic acid.  
     
     
         37 . The method of  claim 32  wherein the first polyol ester is canola oil and the second polyol ester is a trimethylolpropane (TMP) ester selected from the group consisting of TMP tri(2-ethyl hexanoate), TMP triheptanoate (TMPTH), TMP tricaprylate, TMP tricaprate, TMP tri(isononanoate) and TMP trioleate.  
     
     
         38 . The method of  claim 32  wherein the first polyol ester is canola oil and the second polyol ester is a TMP triheptanoate.  
     
     
         39 . The method of  claim 32  wherein the minor deposit-inhibiting effective amount of component (b) of the lubricating oil composition is about 0.05 to about 10 wt. %, based on the total weight of the composition.  
     
     
         40 . The method of  claim 32  wherein the minor deposit-inhibiting effective amount of component (b) of the lubricating oil composition is about 0.1 to about 8 wt. %, based on the total weight of the composition.  
     
     
         41 . The method of  claim 32  wherein the minor deposit-inhibiting effective amount of component (b) of the lubricating oil composition is about 0.2 to about 5 wt. %, based on the total weight of the composition.  
     
     
         42 . The method of  claim 32  wherein the lubricating oil composition has an SAE Viscosity Grade of 0W, 0W-20, 0W-30, 0W-40, 0W-50, 0W-60, 5W, 5W-20, 5W-30, 5W-40, 5W-50, 5W-60, 10W, 10W-20, 10W-30, 10W-40, 10W-50, 15W, 15W-20, 15W-30 or 15W-40.  
     
     
         43 . The method of  claim 32  wherein the lubricating oil composition has a phosphorous content not exceeding 0.08 wt. %, based on the total weight of the composition.  
     
     
         44 . The method of  claim 32  wherein the lubricating oil composition has a phosphorous content not exceeding 0.05 wt. %, based on the total weight of the composition  
     
     
         45 . The method of  claim 43  wherein the lubricating oil composition has a sulfur content not exceeding 0.2 wt. %, based on the total weight of the composition.  
     
     
         46 . The method of  claim 44  wherein the lubricating oil composition has a sulfur content not exceeding 0.2 wt. %, based on the total weight of the composition.  
     
     
         47 . The method of  claim 32  wherein the lubricating oil composition further comprises at least one additive selected from the group consisting of metallic detergents, ashless dispersants, friction modifiers, extreme pressure agents, viscosity index improvers and pour point depressants such that the phosphorous content of the lubricating oil composition is no greater than 0.08 wt. % and the sulfur content of the lubricating oil composition is no greater than 0.2 wt. %, based on the total weight of the composition.

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