US2011160110A1PendingUtilityA1

Lubricating grease compositions

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Assignee: DAEGLING STEFANPriority: Aug 1, 2008Filed: Jul 15, 2009Published: Jun 30, 2011
Est. expiryAug 1, 2028(~2 yrs left)· nominal 20-yr term from priority
Inventors:Stefan Daegling
C10N 2030/06C10M 2207/129C10M 2207/1285C10N 2020/04C10M 2207/1236C10N 2040/044C10M 2209/1065C10M 2209/1045C10M 107/34C10N 2040/04C10M 2209/1085C10M 2209/1055C10M 2207/125C10M 2209/1033C10N 2050/10C10M 2209/1075C10M 169/00C10M 117/00C10N 2020/01C10M 2207/1276C10M 2207/22
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Claims

Abstract

Lubricating grease composition comprising: (i) a polyalkylene glycol base oil; (ii) a lithium complex thickener; and (iii) a carboxylic acid comprising 18 carbon atoms or greater. The lubricating grease compositions according to the present invention are particularly useful for reducing friction in a dual mass flywheel application.

Claims

exact text as granted — not AI-modified
1 . A lubricating grease composition comprising:
 (i) a polyalkylene glycol base oil;   (ii) a lithium complex thickener; and   (iii) a carboxylic acid comprising 18 carbon atoms or greater.   
     
     
         2 . The lubricating grease composition according to  claim 1  wherein the carboxylic acid comprises from 18 to 54 carbon atoms. 
     
     
         3 . The lubricating grease composition according to  claim 1  wherein the carboxylic acid is selected from dimer and trimer acids having the general formula R(COOH) n , wherein n is 2 or 3, and wherein R is a hydrocarbon radical having from 36 to 54 carbon atoms. 
     
     
         4 . The lubricating grease composition according to  claim 3  selected from dimers and trimers of linoleic acid. 
     
     
         5 . The lubricating composition according to any of  claim 4  wherein the lithium complex thickener comprises a lithium soap of a C 12  to C 24  hydroxycarboxylic acid and a lithium soap of a C 2  to C 12  dicarboxylic acid. 
     
     
         6 . The lubricating composition according to  claim 5  wherein the lithium soap of a C 12  to C 24  hydroxycarboxylic acid is lithium 12-hydroxy stearate. 
     
     
         7 . The lubricating composition according to  claim 6  wherein the C 2  to C 12  dicarboxylic acid is selected from azelaic acid, sebacic acid and mixtures thereof. 
     
     
         8 . The lubricating composition according to  claim 7  wherein said polyalkylene glycol base oil is a homopolymer of polypropylene glycol. 
     
     
         9 . The lubricating grease composition according to  claim 8  wherein said polyalkylene glycol base oil has a density of from 900 to 1400 Kg/m 3 . 
     
     
         10 . (canceled) 
     
     
         11 . (canceled)

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