US2015166923A1PendingUtilityA1

Lubricating oil composition

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Assignee: IDEMITSU KOSAN COPriority: Jul 11, 2012Filed: Jul 11, 2013Published: Jun 18, 2015
Est. expiryJul 11, 2032(~5.9 yrs left)· nominal 20-yr term from priority
Inventors:Yumiko Kiko
C10M 141/10C10N 2030/04C10M 2223/06C10M 2223/04C10M 2205/0285C10N 2020/02C10N 2030/02C10M 2223/047F16C 33/109C10N 2040/04C10M 129/72C10M 2207/126C10M 101/02C10N 2030/06C10M 2215/065C10N 2030/42C10M 2207/34C10M 2203/1006C10N 2030/10C10M 133/12C10N 2010/06C10N 2030/43C10M 2207/282C10M 2223/041C10M 2215/223C10M 2219/085C10N 2040/02C10M 2215/064C10M 107/02
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Claims

Abstract

A lubricating oil composition contains a base oil, (A) a phosphate, (B) a thiophosphate and (C) a naphthylamine derivative. The lubricating oil composition is excellent in wear resistance and is unlikely to generate sludge even at a high temperature, and thus is suitable for an oil-impregnated bearing of a high-speed spindle motor provided to DVD-RAM, Blu-ray disc or the like.

Claims

exact text as granted — not AI-modified
1 . A lubricating oil composition comprising:
 a base oil;   (A) a phosphate;   (B) a thiophosphate; and   (C) a naphthylamine derivative.   
     
     
         2 . The lubricating oil composition according to  claim 1 , further comprising (D) an alkenylsuccinic acid polyhydric alcohol ester. 
     
     
         3 . The lubricating oil composition according to  claim 1 , further comprising (E) a benzotriazole or a derivative thereof. 
     
     
         4 . The lubricating oil composition according to  claim 1 , wherein the base oil is a hydrocarbon base oil. 
     
     
         5 . The lubricating oil composition according to  claim 1 , wherein the lubricating oil composition is used for an oil-impregnated bearing. 
     
     
         6 . The lubricating oil composition according to  claim 5 , wherein the oil-impregnated bearing is used for a rotation drive motor for a synthetic resin disc.

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