Lubricant composition

Patent metadata

Field	Value
Publication number	US-9309481-B2
Application number	US-201113583738-A
Country	US
Kind code	B2
Filing date	Mar 10, 2011
Priority date	Mar 12, 2010
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

A lubricant oil composition which is excellent in deposition resistance, corrosion resistance and wear resistance, despite its low phosphorus content and low sulfuric acid ash content, is provided by using a succinimide compound in combination with at least one selected from specific sulfur-containing compounds, specific heterocyclic compounds and reaction products thereof.

First claim

The invention claimed is:

1. A lubricant oil composition, comprising:
mineral oil;
3 to 7% by mass, based on the total mass of the lubricant oil composition, of a boron derivative of polybutenylsuccinic acid monoamide; and
at least one selected from the group consisting of component (A) and component (D),
wherein component (A) is 0.1 to 2.0% by mass, based on the total mass of the lubricant oil composition, of a sulfur-comprising compound of formula (I):
R 1 —Y—(CH 2 ) n —S x1 —(CH 2 ) n —Y—R 2   (I),

wherein:
R 1 and R 2 are each independently i) a hydrogen atom; ii) a C 1 -C 50 hydrocarbon group selected from an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, and an aryl group, or iii) a C 1 -C 50 hetero atom-comprising group comprising an atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom, which is contained in a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, and an aryl group;
each Y is independently a divalent group selected from —O—, —S—, —SO—, —SO 2 —, —(C═O)O—, —(C═O)NH—, —O(C═O)NH—, —C(═O)—, —N(H)—, —NHCONH—, —N═N—, —NH—C(═NH)—NH— and —S—C(═O)—;
X1 is an integer of 1 to 3; and
each n is independently an integer of 1 to 5; and

wherein component (D) is 0.1 to 10% by mass, based on the total mass of the lubricant oil composition, of 2,5-(bis(n-octyldithio)-1,3,4-thiadiazole.

2. The lubricant oil composition of claim 1 , having a phosphorus content of 0.5% by mass or less and a sulfuric acid ash content of 0.6% by mass or less, based on a total mass of the composition.

3. The lubricant oil composition of claim 1 , having a phosphorus content of 0% by mass and a sulfuric acid ash content of 0.1% by mass or less, based on a total mass of the composition.

4. The lubricant oil composition of claim 1 , comprising component (A), wherein, in formula (I), X1 is 1.

5. The lubricant oil composition of claim 1 , wherein the lubricant oil composition is employed in an engine comprising a post treatment device.

6. The lubricant oil composition of claim 1 , comprising component (A), wherein, in formula (I):
X1 is 1; and
n is 1 ort.

7. The lubricant oil composition of claim 1 , having a sulfur content of 0.4% by mass or less and a boron content of 0.4% by mass or less, based on a total mass of the composition.

8. The lubricant oil composition of claim 1 , comprising component (A).

9. The lubricant oil composition of claim 1 , comprising component (D).

10. The lubricant oil composition of claim 1 , further comprising component (B), wherein component (B) is a sulfur-comprising compound of formula (II):

wherein:
R 3 to R 12 are each independently i) a hydrogen atom; ii) a C 1 -C 50 hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, and an aryl group, or iii) a C 1 -C 50 hetero atom-comprising group comprising an atom selected from the group consisting of an oxygen atom, a nitrogen atom, and a sulfur atom, which is contained in a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, and an aryl group;
each Y is independently a divalent group selected from the group consisting of —O—, —S—, —SO—, —SO 2 —, —(C═O)O—, —(C═O)NH—, —O(C═O)NH—, —C(═O)—, —N(H)—, —NHCONH—, —N═N—, —NH—C(═NH)—NH—, —S—C(═O)—, —NH—C(═S)— and —NH—C(═S)—NH—; and
X2 is an integer of 1 to 3.

11. The lubricant oil composition of claim 8 , wherein the component (A) is bis(tridecyloxycarbonylethyl) sulfide.

12. A lubricant oil composition, comprising:
mineral oil;
3 to 7% by mass, based on the total mass of the lubricant oil composition, of a boron derivative of polybutenylsuccinic acid monoamide; and
at least one of 0.1 to 10% by mass, based on the total mass of the lubricant oil composition, of 2,6-di-t-butyl-4-(4,6-bis(octylthio)-1,3,5-triazine-2-ylamino)phenol and 2,5-(bis(n-octyldithio)-1,3,4-thiadiazole.

13. The lubricant oil composition of claim 8 , wherein in formula (I):
R 1 and R 2 are each independently i) a hydrogen atom or ii) a C 1 -C 50 alkyl group;
each Y is independently a divalent group selected from —O—, —(C═O)O— and —C(═O)—;
X1 is an integer of 1 or 2; and
each n is independently an integer of 1 to 5.

14. A lubricant oil composition, comprising:
mineral oil;
3 to 7% by mass, based on the total mass of the lubricant oil composition, of a boron derivative of polybutenylsuccinic acid monoamide; and
at least one of:
0.1 to 2.0% by mass, based on the total mass of the lubricant oil composition, of bis(tridecyloxycarbonylethyl) sulfide; and
0.1 to 10% by mass, based on the total mass of the lubricant oil composition, of 2,5-(bis(n-octyldithio)-1,3,4-thiadiazole.

Assignees

• Kamano Hideki
• Kaji Masashi
• Idemitsu Kosan Co

Inventors

• Kamano Hideki
• Kaji Masashi

Classifications

• C10M2219/066

  Thiocarbamic type compounds · CPC title

• C10M2219/09

  Heterocyclic compounds containing no sulfur, selenium or tellurium compounds in the ring · CPC title

• C10N2030/45

  Ash-less or low ash content · CPC title

• C10M141/12

  at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10 · CPC title

• C10M2215/222

  Triazines · CPC title