Antioxidant composition and lubricating oil composition containing same

Patent metadata

Field	Value
Publication number	US-9382498-B2
Application number	US-201113822494-A
Country	US
Kind code	B2
Filing date	Aug 26, 2011
Priority date	Sep 14, 2010
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

Provided is an antioxidant composition, including: a compound (A) represented by the following general formula (1); and an amine-based antioxidant (B) and/or a phenol-based antioxidant (C) other than the compound (A):

(wherein R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and n represents a number from 1 to 3.).

First claim

The invention claimed is:

1. An antioxidant composition for a lubricating oil composition, consisting of:
a compound (A) represented by the following formula (1);
at least 1 mass % of an amine-based antioxidant (B) selected from the following formulas (2) and (3) based on a total of components (A), (B) and (C); and
at least 1 mass % of a phenol-based antioxidant (C) represented by the following formula (4) based on a total of components (A), (B) and (C),
wherein a ratio of the compound (A) to the amine-based antioxidant (B) and the phenol-based antioxidant (C) is 70/30 to 95/5 in terms of weight ratio:

wherein R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and n represents a number from 1 to 3;

wherein R 1 and R 2 each independently represents a hydrogen atom or an aliphatic hydrocarbon group having 1 to 18 carbon atoms;

wherein R 3 and R 4 each independently represents a hydrogen atom or an aliphatic hydrocarbon group having 1 to 18 carbon atoms;

wherein R 5 and R 6 each independently represents any one of a hydrogen atom and an alkyl group having 1 to 4 carbon atoms, R 7 represents a hydrocarbon group having 1 to 20 carbon atoms which may contain an ester group, and m represents a number of 1 to 4, provided that any one of R 5 and R 6 must be an alkyl group having 1 to 4 carbon atoms.

2. A lubricating oil composition, comprising:
the antioxidant composition according to claim 1 ; and
a base oil,
wherein a blending amount of the antioxidant composition is 0.01 to 10 mass % with respect to a total amount of the lubricating oil composition.

Assignees

• Tatsumi Yokio
• Umehara Kazuhiro
• Iino Shinji
• Adeka Corp

Inventors

• Tatsumi Yokio
• Umehara Kazuhiro
• Iino Shinji

Classifications

• C10N2050/10

  semi-solid; greasy · CPC title

• C10N2070/02

  Concentrating of additives · CPC title

• C10N2040/08

  Hydraulic fluids, e.g. brake-fluids · CPC title

• C10N2040/04

  Oil-bath; Gear-boxes; Automatic transmissions; Traction drives · CPC title

• C10N2040/24

  without essential removal of material {, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding}; Punching metal · CPC title