US2018044605A1PendingUtilityA1

Grease composition

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Assignee: SHELL OIL COPriority: Feb 11, 2015Filed: Feb 9, 2016Published: Feb 15, 2018
Est. expiryFeb 11, 2035(~8.5 yrs left)· nominal 20-yr term from priority
Inventors:Stefan Daegling
C10M 169/041C10N 2010/04C10N 2050/10C10N 2040/02C10N 2020/02C10N 2030/06C10N 2030/02C10N 2030/36C10M 2217/0456C10M 169/04C10M 2207/1265C10M 169/00C10M 2207/1285C10M 169/02C10M 2205/0285C10N 2230/02C10N 2250/10C10N 2230/36C10N 2210/02C10N 2220/022C10N 2230/06C10N 2240/02
31
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Claims

Abstract

A grease composition comprising a polyalphaolefin and a thickener which is a fatty acid salt of calcium is disclosed. The composition is suitable for use at a seal-metal interface in a sealed bearing.

Claims

exact text as granted — not AI-modified
1 . A grease composition comprising from 40 to 90 wt % of a first base oil component which is a polyalphaolefin and having a kinematic viscosity at 100° C. of between 1 and 5 mm 2 /s, wherein the weight percentage is based upon the weight of the grease composition, and comprising a thickener which is a C13-C21 fatty acid salt of calcium. 
     
     
         2 . A grease composition according to  claim 1 , wherein the amount of thickener is from 2 to 18 wt %, based upon the weight of the grease composition. 
     
     
         3 . A method comprising:
 applying a grease composition at a seal-metal interface in a sealed bearing, wherein the grease composition comprises from 40 to 90 wt % of a first base oil component which is a polyalphaolefin and has a kinematic viscosity at 100° C. of between 1 and 5 mm 2 /s, wherein the weight percentage is based upon the weight of the grease composition, and comprises a thickener which is a C13-C21 fatty acid salt of calcium.   
     
     
         4 . A method according to  claim 3 , wherein the amount of thickener is from 2 to 18 wt %, based upon the weight of the grease composition. 
     
     
         5 . A grease composition according to  claim 1 , wherein the amount of thickener is from 2 to 14 wt %, based upon the weight of the grease composition. 
     
     
         6 . A method according to  claim 3  wherein the amount of thickener is from 2 to 14 wt %, based upon the weight of the grease composition.

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