US2025230378A1PendingUtilityA1

Grease composition

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Assignee: KYODO YUSHIPriority: Mar 25, 2022Filed: Mar 27, 2023Published: Jul 17, 2025
Est. expiryMar 25, 2042(~15.7 yrs left)· nominal 20-yr term from priority
Inventors:Yoshiyuki NagasawaChiemi NakayamaDaisuke Tsutsui
C10N 2050/10C10M 2213/062C10M 2209/1085C10M 2207/126C10M 2201/085C10M 2201/062C10M 161/00C10M 147/00C10M 129/40C10M 125/24C10M 125/10C10M 107/34C10M 147/02C10M 125/28C10N 2030/08C10M 2215/221C10M 2223/045C10M 2201/066C10M 2219/068C10M 2215/1026C10M 2207/1285C10N 2020/011C10N 2020/04C10N 2020/02C10M 2209/1055C10M 169/044C10M 169/04
54
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Claims

Abstract

A grease composition includes a base oil, a thickener, and an additive. The base oil is at least one selected from the group consisting of polyoxyalkylene, ether derivatives of polyoxyalkylene, and mixtures thereof. The additive includes polytetrafluoroethylene as a first solid lubricant and at least one selected from the group consisting of calcium carbonate, calcium oxide, tricalcium phosphate, and calcium salts of fatty acids as a second solid lubricant. The content of the second solid lubricant is 0.5% by mass or more based on the total mass of the composition.

Claims

exact text as granted — not AI-modified
1 . A grease composition comprising a base oil, a thickener, and an additive, wherein
 the base oil is at least one selected from the group consisting of polyoxyalkylene, ether derivatives of polyoxyalkylene, and mixtures thereof,   the additive comprises polytetrafluoroethylene as a first solid lubricant and at least one selected from the group consisting of calcium carbonate, calcium oxide, tricalcium phosphate, and calcium salts of fatty acids as a second solid lubricant, and   a content of the second solid lubricant is 0.5% by mass or more based on a total mass of the composition.   
     
     
         2 . The grease composition according to  claim 1 , wherein a content of the first solid lubricant is 0.5 to 20% by mass based on the total mass of the composition. 
     
     
         3 . The grease composition according to  claim 1 , wherein a content of the second solid lubricant is 0.5 to 10% by mass based on the total mass of the composition. 
     
     
         4 . The grease composition according to  claim 1 , wherein the second solid lubricant is calcium carbonate. 
     
     
         5 . The grease composition according to  claim 1 , wherein the first and second solid lubricants are contained in a ratio of 3 to 5% by mass of the second solid lubricant to 10% by mass of the first solid lubricant. 
     
     
         6 . A mechanical part to which the grease composition according to  claim 1  is applied.

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