Lubricant composition and antioxidant composition

• US 20110077181A1
• Filed: 11/30/2010
• Published: 03/31/2011
• Est. Priority Date: 10/19/2004
• Status: Active Grant

• Current Assignee: Nippon Oil Corporation (ENEOS Holdings, Inc.)
• Original Assignee: Nippon Oil Corporation (ENEOS Holdings, Inc.)
• Inventors: Yagishita, Kazuhiro
• Granted Patent: US 8,603,955 B2
• Time in Patent Office: Days
• US Class Current: 508/382
• CPC Class Codes: C10M 139/06 having a metal-to-carbon bond metal complexes of unknown constitution C10M159/18
• CPC Class Codes: C10M 169/042 the additives being compounds of unknown or incompletely defined constitution only
• CPC Class Codes: C10M 2203/06 Well-defined aromatic compounds
• CPC Class Codes: C10M 2203/065 used as base material
• CPC Class Codes: C10M 2203/1006 used as base material
• CPC Class Codes: C10M 2203/1025 used as base material
• CPC Class Codes: C10M 2203/104 Aromatic fractions
• CPC Class Codes: C10M 2203/1045 used as base material
• CPC Class Codes: C10M 2205/0206 used as base material
• CPC Class Codes: C10M 2205/022 Ethene
• CPC Class Codes: C10M 2205/024 Propene
• CPC Class Codes: C10M 2207/023 having hydroxy groups bound to carbon atoms of six-membered aromatic rings
• CPC Class Codes: C10M 2207/026 with tertiary alkyl groups
• CPC Class Codes: C10M 2207/122 monocarboxylic
• CPC Class Codes: C10M 2207/126 monocarboxylic
• CPC Class Codes: C10M 2207/289 containing free hydroxy groups
• CPC Class Codes: C10M 2215/04 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2215/064 Di- and triaryl amines
• CPC Class Codes: C10M 2215/28 Amides; Imides
• CPC Class Codes: C10M 2219/00 Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
• CPC Class Codes: C10M 2219/068 : Thiocarbamate metal salts
• CPC Class Codes: C10M 2219/086 : containing sulfur atoms bound to carbon atoms of six-membered aromatic rings
• CPC Class Codes: C10M 2219/089 : Overbased salts
• CPC Class Codes: C10M 2223/042 : Metal salts thereof
• CPC Class Codes: C10M 2227/09 : Complexes with metals
• CPC Class Codes: C10N 2010/04 : Groups 2 or 12
• CPC Class Codes: C10N 2010/12 : Groups 6 or 16
• CPC Class Codes: C10N 2030/10 : Inhibition of oxidation, e.g. anti-oxidants
• CPC Class Codes: C10N 2040/25 : Internal-combustion engines
• CPC Class Codes: C10N 2060/14 : by boron or a compound containing boron

Abstract

The lubricating oil composition of the present invention comprises at least one species of aromatic constituent selected from the following (a1) to (a5):

• (a1) a lubricating base oil comprising a polycyclic aromatic content of 0.01% by mass or more based on the total amount of base oil
• (a2) a lubricating base oil comprising a total aromatic content of 20 to 100% by mass based on the total amount of base oil
• (a3) an aromatic solvent
• (a4) at least one species of polycyclic aromatic compound selected from alkyl naphthalene and compounds having three or more aromatic rings, and
• (a5) an aromatic compound having a nitrogen atom, an oxygen atom or a sulfur atom;
  and an organic molybdenum compound.

Claims

1-10. -10. (canceled)

11. A lubricating oil composition, comprising:

a lubricating base oil;

an organic molybdenum compound; and

an aromatic compound having a structure represented by the following General Formula (1);

(R)_a-A-(X)_b 

 

(1)

wherein A represents an aromatic ring, X represents a monovalent functional group having at least one nitrogen atom, oxygen atom or sulfur atom, R represents an organic group having 1 to 40 carbons with the proviso that the tert-butyl group is excluded, a represents an integer of 1 or greater, b represents an integer of 1 or greater when A is an aromatic carbocyclic ring, and b represents an integer of 0 or 1 or greater when A is a heteroaromatic ring.