Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
Japanese Patent JP3495168
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a lubricating oil composition having excellent antioxidant performance by mixing a base oil comprising a mineral or synthetic oil having specified properties with an alkyl sulfide, an alkylated phenyl-α-naphthylamine and benzotriazole or its derivative.
SOLUTION: A base oil comprising a mineral or synthetic oil and having a content of an aromatic component of 1mass% or below, a sulfur content of 100ppm or below and a viscosity index of 100 or above is mixed with 0.1-3mass% alkyl sulfide (e.g. di-n-butyl sulfide) represented by the formula: R1-S-R2 (wherein R1 and R2 are each a 3-16 C hydrocarbon group), 0.1-3mass% alkylated phenyl-α-naphthylamine represented by formula I (wherein R3 is a 1-16C alkyl) and 0.001-0.5 mass % benzotriazole represented by formula II or a derivative thereof and optionally 0.1-2mass% alkylated diphenylamine represented by formula III (wherein R4 and R5 are each H or a 1-16C alkyl), 0.1-1mass% phosphite represented by formula IV (wherein R6 and R7 are each a 1-12C alkyl) and about 0.01-5mass% alkylsuccinic acid derivative to obtain a lubricating oil composition.
Inventors:
Takayuki Kobayashi
Mikio Shirakura
Norio Yano
Mikio Shirakura
Norio Yano
Application Number:
JP34904795A
Publication Date:
February 09, 2004
Filing Date:
December 21, 1995
Export Citation:
Assignee:
Cosmo Research Institute Co., Ltd.
Cosmo Oil Co., Ltd.
Cosmo Oil Co., Ltd.
International Classes:
C10M141/08; C10M141/10; C10M169/04; C10N20/02; C10N30/08; C10N30/10; C10N40/00; C10N40/06; (IPC1-7): C10M169/04
Domestic Patent References:
| JP7228882A | ||||
| JP7258677A | ||||
| JP5258705A |
Attorney, Agent or Firm:
Orikuchi Shingo
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