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Lubricating oil composition

A technology of lubricating oil composition and lubricating oil base oil, which is applied in the direction of lubricating composition, petroleum industry, additives, etc., can solve the problems of lead corrosion loss prevention effect deterioration, etc., and achieve excellent long-term lubricating performance and excellent anti-corrosion performance Effect

Inactive Publication Date: 2007-09-26
NIPPON OIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is also known in the prior art that when the content of zinc dithiophosphate decreases, its effect of preventing lead corrosion loss deteriorates exponentially (for example, see Non-Patent Document 6)

Method used

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  • Lubricating oil composition
  • Lubricating oil composition
  • Lubricating oil composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12、 comparative example 1～3

[0245] As shown in Table 1, lubricating oil compositions of the present invention (Examples 1 to 12) and comparative lubricating oil compositions (Comparative Examples 1 to 3) were prepared.

[0246] implement

example 1

implement

Example 2

implement

Example 3

implement

Example 4

implement

Example 5

implement

Example 6

implement

Example 7

implement

Example 8

implement

Example 9

implement

Example 10

Compare

example 1

Compare

Example 2

implement

Example 11

implement

Example 12

Compare

Example 3

Lubricant base oil ※1) Mass%

Lubricant base oil ※2) Mass%

margin

--

margin

--

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--

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--

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--

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--

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--

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--

--

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--

margin

margin

--

margin

--

margin

--

margin

--

margin

...

Embodiment 13～21、 comparative example 4

[0269] As shown in Table 2, lubricating oil compositions of the present invention (Examples 13 to 21) and comparative lubricating oil compositions (Comparative Example 4) were prepared.

[0270] Example

13

Example

14

Example

15

Example

16

Example

17

Example

18

Example

19

Example

20

Compare

Example 4

implement

Example 21

Lubricant base oil ※1) Mass%

margin

margin

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margin

margin

margin

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margin

Tri-n-butyl borate ※2) Mass%

Tris-2-ethylhexyl borate ※3) Mass %

Conversion amount of boron element mass%

0.3

--

(0.015)

--

0.5

(0.015)

0.3

--

(0.015)

--

0.5

(0.015)

0.3

--

(0.015)

--

0.5

(0.015)

1.5

--

(0.075)

--

1.5

(0.075)

--

--

--

--

--

--

Amine complex of Mo ※4...

Embodiment 22～29、 comparative example 5

[0286] As shown in Table 3, the lubricating oil compositions of the present invention (Examples 22 to 29) and the lubricating oil composition for comparison (Comparative Example 5) were prepared respectively.

[0287] Example

twenty two

Example 23

Example 24

Example

25

Example

26

Example

27

Example

28

comparative example

5

Example

29

Lubricant base oil ※1) Mass%

margin

margin

margin

margin

margin

margin

margin

margin

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Amine complex of Mo ※2) Mass%

Conversion amount of molybdenum element mass%

0.05

(0.005)

0.1

(0.01)

0.2

(0.02)

0.5

(0.05)

0.7

(0.07)

0.2

(0.02)

0.2

(0.02)

--

--

0.2

(0.02)

Boric acid-modified succinimide*3) mass%

5

5

5

5

5

2.5

10

5

--

Succinimide ※4) mass%

--

...

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Abstract

A lubricating oil composition which comprises a lube base oil and optionally contains zinc dithiophosphate in an amount of 0.08% by mass or below in terms of phosphorus based on the total amount of the composition and which is to be brought into contact with lead-containing metal materials, containing at least one additive selected from the group consisting of the following (A) to (D): (A) an organomolybdenum compound (except molybdenum dithio- phosphate), (B) a boric ester and / or a derivative thereof, (C) an organomolybdenum compound and a boric ester and / or a derivative thereof, and (D) an organomolybdenum compound and a boric acid-modified alkyl- or alkenylsuccinimide.

Description

Technical field: [0001] The present invention relates to a lubricating oil composition capable of inhibiting corrosion or corrosion loss of lead-containing metal materials, copper-lead-containing metal materials, or both lead-containing and copper-containing metal materials, and more particularly, the present invention relates to a A lubricating oil composition capable of inhibiting corrosion or corrosion wear of these materials at very low levels of zinc dithiophosphate. Background technique: [0002] For sliding materials such as engines, iron-based and aluminum-based metal materials are mainly used. However, among sliding materials, sliding parts such as main bearings and connecting rod bearings, such as bearing alloys, in addition to metal materials such as aluminum, copper, and tin, sometimes also use lead-containing metal materials, lead-containing Copper metal material. On the one hand, these lead-containing metal materials have the advantage of less fatigue phenome...

Claims

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Application Information

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IPC IPC(8): C10M129/06C10M129/16C10M129/28C10M129/76C10M133/06C10M133/16C10M135/18C10M137/00C10M139/00C10M141/10C10M141/12C23F11/10
Inventor 八木下和宏
Owner NIPPON OIL CO LTD
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