US2018371352A1PendingUtilityA1

Method for improving the air release of a lubricating oil

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Assignee: SHELL OIL COPriority: Nov 24, 2015Filed: Nov 22, 2016Published: Dec 27, 2018
Est. expiryNov 24, 2035(~9.3 yrs left)· nominal 20-yr term from priority
Inventors:Sravani Gullapalli
C10M 2205/0285C10N 2040/08C10N 2030/30C10N 2020/04C10N 2020/02C10M 145/14C10N 2030/18C10N 2070/00C10N 2030/02C10M 145/10C10M 2209/084C10M 2203/1025C10M 2205/0206C10M 2205/173C10M 177/00C10M 169/041C10N 2270/00C10N 2220/021C10N 2230/02C10N 2240/08C10N 2230/18C10M 169/04
31
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Claims

Abstract

The invention provides a method for improving the air release of a lubricating oil as measured by ASTM D3427. The method comprises a step of mixing an additive into the lubricating oil.

Claims

exact text as granted — not AI-modified
1 . A method for improving the air release of a lubricating oil as measured by ASTM D3427, said method comprising mixing an additive into the lubricating oil using a high shear mixer; wherein the additive is an alkyl acrylate polymer. 
     
     
         2 . The method according to  claim 1 , wherein the lubricating oil comprises a base oil component, and the base oil component comprises at least 75 wt % of a GTL base oil based upon the weight of the base oil component. 
     
     
         3 . A The method according to  claim 1 , wherein the lubricating oil has a kinematic viscosity in the range of from 5 to 220 cSt at 40° C. 
     
     
         4 . A The method according to  claim 1 , wherein the lubricating oil is formulated for use a hydraulic fluid. 
     
     
         5 . A The method according to  claim 1 , wherein the molecular weight of the alkyl acrylate polymer is less than 10,000. 
     
     
         6 . A The method according to  claim 1 , wherein the alkyl acrylate polymer is a homopolymer of an alkyl acrylate having at least 3 but less than 7 carbon atoms in the alkyl radical, or the alkyl acrylate polymer is a copolymer of at least two different alkyl acrylates in which the alkyl radical has from 1 to 18 carbon atoms and in which the average number of carbon atoms in the alkyl radicals of the copolymer molecular is at least 3 but less than 7 on a molar basis. 
     
     
         7 . A The method according to  claim 1 , wherein at least 0.0005 wt % and less than 0.1 wt % of alkyl acrylate polymer, based upon the weight of the lubricating oil, is mixed into the lubricating oil. 
     
     
         8 . A The method according to  claim 1 , wherein the additive is mixed into the lubricating oil at a rate of at least 400 rpm. 
     
     
         9 . A The method according to  claim 1 , wherein the additive is mixed into the lubricating oil at a rate of at least 800 rpm.

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