US2023416633A1PendingUtilityA1

Grease composition for constant-velocity joints

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Assignee: KYODO YUSHIPriority: Nov 26, 2020Filed: Nov 26, 2020Published: Dec 28, 2023
Est. expiryNov 26, 2040(~14.3 yrs left)· nominal 20-yr term from priority
Inventors:Tadaaki KonnoTomohiko YamaguchiJisheng EChristoph LindlahrJoachim WetteTomio Seki
C10M 169/00C10M 115/08C10M 135/18C10M 137/10C10M 135/10C10M 141/10C10M 2203/003C10M 2215/1026C10M 2219/068C10M 2223/045C10M 2219/046C10M 2219/044C10N 2050/10C10M 169/06C10N 2040/02C10N 2030/00C10N 2040/04C10N 2030/06C10N 2030/76C10M 2205/0285C10M 2207/1285C10M 141/02C10M 141/08C10M 141/12C10M 163/00C10M 2203/1006C10N 2020/02C10N 2030/52
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Claims

Abstract

The present invention provides a grease composition for constant-velocity joints comprising (a) a base oil, (b) a diurea thickener, (c) molybdenum dithiocarbamate, (d) molybdenum dithiophosphate, (e) overbased calcium sulfonate, and (f) neutral zinc sulfonate. The composition of the present invention is excellent in durability at high temperature and vibration suppression.

Claims

exact text as granted — not AI-modified
1 . A grease composition for constant-velocity joints comprising:
 (a) a base oil;   (b) a diurea thickener;   (c) molybdenum dithiocarbamate;   (d) molybdenum dithiophosphate;   (e) overbased calcium sulfonate; and   (f) neutral zinc sulfonate.   
     
     
         2 . The grease composition according to  claim 1 , wherein a content of the component (f) is 0.1 to 10% by mass based on the total mass of the composition. 
     
     
         3 . The grease composition according to  claim 1 , wherein a content of the component (f) is 0.5 to 5% by mass based on the total mass of the composition. 
     
     
         4 . The grease composition according to  claim 1 , wherein a content of the component (f) is 0.8 to 3% by mass based on the total mass of the composition. 
     
     
         5 . The grease composition according to  claim 1 , wherein a content of the component (e) is 0.1 to 10% by mass based on the total mass of the composition. 
     
     
         6 . The grease composition according to  claim 1 , wherein a content of the component (e) is 0.2 to 5% by mass based on the total mass of the composition. 
     
     
         7 . The grease composition according to  claim 1 , wherein a content of the component (e) is 1.2 to 3.5% by mass based on the total mass of the composition. 
     
     
         8 . The grease composition according to  claim 1 , wherein the component (b) is an aliphatic diurea thickener. 
     
     
         9 . A constant-velocity joint in which the grease composition according to  claim 1  is enclosed.

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