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US 10,760,030 B2Granted
Grease
AssigneeIdemitsu Kosan Co., Ltd.
InventorsKouji Takane, Tsukasa Yamagishi
Life of this patent
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Abstract
A grease of the invention contains a fluorine synthetic oil as a base oil and an inorganic acid salt that is at least one selected from phosphate, tungstate, sulfate and sulfite. The grease of the invention is suitably usable in a bearing, a gear and the like because of an excellent wear resistance and a low environmental burden.
Claims18
A grease, comprising:
- a perfluoropolyether as a base oil;
- an inorganic acid salt that is a combination of phosphate inorganic acid salt and tungstate inorganic acid salt, wherein a content of the inorganic acid salt is in a range of from 3.4 mass % to 5.0 mass % based on a total amount of the grease and wherein the phosphate inorganic acid salt and the tungstate inorganic acid salt are an alkali metal salt, wherein a total content of the tungstate inorganic acid salt is in a range of from 0.9 mass % to 2.5 mass % based on a total amount of the grease.
Dependencies are inferred from the claim text.