US2014274849A1PendingUtilityA1

Lubricating composition providing high wear resistance

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Assignee: EXXONMOBIL RES & ENG COPriority: Mar 14, 2013Filed: Mar 14, 2013Published: Sep 18, 2014
Est. expiryMar 14, 2033(~6.7 yrs left)· nominal 20-yr term from priority
Inventors:Gordon H. LeeNicole D. VaughnSteven KennedyRiccardo ContiWilliam L. Maxwell
C10M 2205/028C10M 171/02C10M 169/04C10N 2020/04C10M 2203/102C10M 169/047C10N 2020/02C10M 2219/046C10N 2040/253C10N 2030/56C10M 2205/0285C10M 2203/1006C10M 143/08C10M 2207/262C10M 2207/028C10N 2040/04C10M 2203/1025C10N 2030/06C10M 143/00
48
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Claims

Abstract

Disclosed are lubricating compositions comprised of a mineral oil base stock including one or more components selected from the group consisting a Group I base oil component, a Group II base oil component, and a Group III base oil component; and a minimal amount of a particular polyalphaolefin component. The lubricating compositions provide improved film thickness and wear properties relative to conventional mineral oil lubricants. In particular, the lubricating compositions provide improved film thickness and wear properties relative to conventional mineral oil lubricants, without the need of having to include additional polar additives to enhance wear and film thickness characteristics.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A lubricating composition, comprising a mixture of:
 at least 60 wt. % of a mineral oil base stock including one or more components selected from the group consisting of a Group I base oil component, a Group II base oil component, and a Group III base oil component, based on the total weight of the lubricating composition; and   from 2 wt. % to 5 wt. % of a polyalphaolefin component, based on the total weight of the lubricating composition, wherein the polyalphaolefin component contains not more than 5.0 wt. % of a polymer having a molecular weight of greater than 45,000 Daltons.   
     
     
         2 . The lubricating composition of  claim 1 , wherein the polyalphaolefin component contains not more than 1.5 wt. % of a polymer having a molecular weight of greater than 45,000 Daltons. 
     
     
         3 . The lubricating composition of  claim 1 , wherein the polyalphaolefin component has a kinematic viscosity of greater than 100 cSt at 100° C. 
     
     
         4 . The lubricating composition of  claim 1 , wherein the polyalphaolefin component has a viscosity index of greater than 100. 
     
     
         5 . The lubricating composition of  claim 1 , wherein the polyalphaolefin component is a mPAO. 
     
     
         6 . The lubricating composition of  claim 1 , wherein the lubricating composition further comprises, in admixture, 1 wt % to 8 wt % of at least one detergent, based on total weight of the lubricating composition. 
     
     
         7 . The lubricating composition of  claim 1 , wherein the lubricating composition further comprises, in admixture, 1 wt % to 20 wt % of at least one dispersant, based on total weight of the lubricating composition. 
     
     
         8 . The lubricating composition of  claim 1 , wherein the lubricating composition has a kinematic viscosity at 100° C. of from 3.8 cSt to 26.1 cSt. 
     
     
         9 . The lubricating composition of  claim 1 , wherein the lubricating composition has a kinematic viscosity at 100° C. of at least 4.1 cSt. 
     
     
         10 . The lubricating composition of  claim 1 , wherein the lubricating composition has a kinematic viscosity at 40° C. of from 1.98 cSt to 1650 cSt. 
     
     
         11 . A method for producing a mineral oil lubricating composition having improved film thickness and wear properties, comprising blending together at least the following components:
 at least 60 wt. % of a mineral oil base stock including one or more components selected from the group consisting of a Group I base oil component, a Group II base oil component, and a Group III base oil component, based on the total weight of the lubricating composition; and   from 2 wt. % to 5 wt. % of a polyalphaolefin component, based on the total weight of the lubricating composition, wherein the polyalphaolefin component contains not more than 5.0 wt. % of a polymer having a molecular weight of greater than 45,000 Daltons.   
     
     
         12 . The method of  claim 11 , wherein the polyalphaolefin component contains not more than 1.5 wt. % of a polymer having a molecular weight of greater than 45,000 Daltons. 
     
     
         13 . The method of  claim 11 , wherein the polyalphaolefin component has a kinematic viscosity of greater than 100 cSt at 100° C. 
     
     
         14 . The method of  claim 11 , wherein the polyalphaolefin component has a viscosity index of greater than 100. 
     
     
         15 . The method of  claim 11 , wherein the polyalphaolefin component is a mPAO. 
     
     
         16 . The method of  claim 11 , wherein the method further comprises blending 1 wt % to 8 wt % of at least one detergent, based on total weight of the lubricating composition. 
     
     
         17 . The method of  claim 11 , wherein the method further comprises blending 1 wt % to 20 wt % of at least one dispersant, based on total weight of the lubricating composition. 
     
     
         18 . The method of  claim 11 , wherein the lubricating composition has a kinematic viscosity at 100° C. of from 3.8 cSt to 26.1 cSt. 
     
     
         19 . The method of  claim 11 , wherein the lubricating composition has a kinematic viscosity at 100° C. of at least 4.1 cSt. 
     
     
         20 . The method of  claim 11 , wherein the lubricating composition has a kinematic viscosity at 40° C. of from 1.98 cSt to 1650 cSt.

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