Lubricating oil composition

a technology of lubricating oil and composition, which is applied in the direction of lubricant composition, base materials, additives, etc., can solve the problems of corrosion of copper contained in the engine members, problems in lifetime, etc., and achieve excellent metal corrosion resistance and excellent wear resistance.

Inactive Publication Date: 2021-02-18
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0030]The lubricating oil composition of the present invention has excellent wear resistance and, even in use in a high-temperature environment higher than 160° C., capable of expressing excellent metal corrosion resistance and heat resistance.

Problems solved by technology

In addition, the metal component-derived ash also deposits on the upper portion of a piston to be a cause of accelerating contamination of a spark-ignition plug.
Consequently, an engine oil for use in a gas engine is used under a high load condition and is therefore readily degraded to often cause a problem in lifetime.
In addition, in a gas engine to be driven under a high load condition, various additives used in the engine oil are readily decomposed, and the decomposition products of the additives may often cause corrosion of copper contained in the members that constitute an engine.

Method used

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  • Lubricating oil composition
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Examples

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examples

[0193]Next, the present invention is described in more detail with reference to Examples, but the present invention is not whatsoever restricted by these Examples. Various properties of the components used in Examples and Comparative Examples and the lubricating oil compositions obtained therein were measured according to the methods mentioned below.

[0194]Measured or calculated according to JIS K 2283:2000.

[0195]Measured according to JPI-5S-38-03.

[0196]Measured according to JIS K2609:1998.

[0197]Measured according to JIS K2541-6:2013.

[0198]Measured according to JIS K2272:1998.

examples 1 to 12

, Comparative Examples 1 to 8

[0199]A base oil and various additives shown below were blended in a blending ratio shown in Tables 1 to 3, and well mixed to prepare lubricating oil compositions having a kinematic viscosity at 100° C. of 12.0 to 13.0 mm2 / s.

[0200]Details of the base oil and various additives used in Examples and Comparative Examples are as shown below.

(Component (A))

[0201]“Base oil (a)”: Hydrorefined 500N mineral oil grouped in Group 2 in the base oil category by API, 40° C. kinematic viscosity=89.3 mm2 / s, 100° C. kinematic viscosity=10.9 mm2 / s, viscosity index=107.

(Component (B1))

[0202]“Non-boronated alkenylsuccinic acid monoimide (b1)”: alkenylsuccinic acid monoimide represented by the general formula (b-1), wherein RA is a polybutenyl group having a number-average molecular weight (Mn) of 1000, nitrogen atom content=2.0% by mass.

(Component (B2))

[0203]“Boronated alkenylsuccinic acid monoimide (b2-1)”: boron-modified derivative of alkenylsuccinic acid monoimide represe...

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Abstract

Provided is a lubricating oil composition for use in internal-combustion engines, containing a base oil (A), an ashless dispersant (B) containing a non-boronated alkenylsuccinic acid imide (B1) and a boronated alkenylsuccinic acid imide (B2), a thiadiazole compound (C), and an aromatic carboxylate (D) having one or more hydroxy groups, wherein the content of the component (C) is 0.2 to 1.2% by mass based on the total amount of the lubricating oil composition, the content of a zinc dithiophosphate is, as calculated in terms of zinc atoms, less than 500 ppm by mass based on the total amount of the lubricating oil composition, and the content of a metal-based detergent is, as calculated in terms of metal atoms, less than 600 ppm by mass based on the total amount of the lubricating oil composition.

Description

TECHNICAL FIELD[0001]The present invention relates to a lubricating oil composition.BACKGROUND ART[0002]Recently, for car engines, high-power engines and also tightening of emission control regulations have become desired, and a development of post-treatment devises for emission gas has been made.[0003]For such post-treatment devices for emission gas, an oxidation catalyst for cleaning exhaust gas, or a ternary catalyst, DPF (diesel particulate filter) or the like is employed.[0004]However, it is reported that a phosphorus component in an engine oil poisons the active point of a catalyst to lower the catalyst function, or an ash derived from a metal component therein deposits on DPF to cause reduction in lifetime. In addition, the metal component-derived ash also deposits on the upper portion of a piston to be a cause of accelerating contamination of a spark-ignition plug.[0005]Consequently, the tendency is toward requiring an engine oil for automobiles, in which the blending amount...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M169/04C10M101/00C10M133/16C10M135/36C10M137/10C10M129/76
CPCC10M169/04C10M101/00C10M133/16C10M135/36C10M137/10C10N2010/04C10M2207/284C10M2207/023C10M2215/086C10M2223/045C10M2219/106C10M129/76C10N2030/06C10N2030/04C10N2030/12C10M2215/28C10N2040/25C10N2060/14C10N2030/02C10N2020/02C10M2203/1025C10M2207/026C10M2215/064C10M2207/027C10M141/10C10M141/12C10M2207/289C10N2030/45C10N2030/42C10N2030/40C10N2020/04C10N2030/20C10N2010/06C10N2010/12
Inventor KASAI, MORITSUGUUTAKA, TOSHIMASA
Owner IDEMITSU KOSAN CO LTD
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