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US 9,068,136 B2Granted
Lubricating oil composition for high-temperature applications
AssigneeIdemitsu Kosan Co., Ltd.
InventorsTakuya Ohno, Tahei Okada, Hideto Kamimura
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Abstract
A lubricating oil composition for high-temperature applications contains (A) a pyromellitate ester, (B) a sulfur-containing triazine antioxidant, and (C) a thiophosphoric acid ester antioxidant. When the lubricating oil composition for high-temperature applications according to the invention is applied to a chain, a gear, a bearing and the like, an amount of evaporation of the lubricating oil composition is restrained for a long time and fluidity thereof is also kept for a long time.
Claims18
A lubricating oil composition, comprising:
- (A) a pyromellitate ester represented by the formula (1):
- wherein R1 to R4 are each, independently, a hydrocarbyl group;
- (B) a sulfur-containing triazine antioxidant;
- (C) a thiophosphoric acid ester antioxidant;
- and at least one of a polybutene having a number-average molecular weight of 400 to 1300 and a polyalphaolefin.
2 more elements
Dependencies are inferred from the claim text.