Lubricating oil composition for shock absorber and friction reduction method for shock absorber
A lubricating oil composition and buffer technology, applied in lubricating compositions, petroleum industry, base materials, etc., can solve the problems of poor thermal stability of additives, easy oxidation of lubricating oil compositions, great importance of thermal stability, etc. , to achieve excellent thermal stability, excellent effect, and the effect of reducing the coefficient of friction
Active Publication Date: 2016-04-06
IDEMITSU KOSAN CO LTD
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Problems solved by technology
[0007] However, phosphorus-based additives have the problem of poor thermal stability
Especially in the case of a two-wheeled vehicle, since the shock absorber is not sealed with nitrogen, the lubricating oil composition is easily oxidized at high temperature, and the importance of thermal stability is greater
Method used
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Embodiment 1～2 and comparative example 1～5
[0118] A lubricating oil composition for a shock absorber containing each component shown in Table 1 was prepared, and a friction coefficient measurement and a thermal stability test were performed. The results are shown in Table 1. In addition, the amount of phosphorus not bonded to sulfur atoms in the lubricating oil compositions for shock absorbers of Examples 1 and 2 was 0.1% by mass or less with respect to the total amount of the lubricating oil compositions.
[0119] [Table 1]
[0120] Table 1
[0121]
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Abstract
Provided is a lubricating oil composition for shock absorbers, having excellent thermal stability and capable of reducing the friction coefficient for rubber. The lubricating oil composition for shock absorbers is characterized by comprising: (A) a mineral oil and / or a base oil comprising a synthetic oil; (B) a zinc dithiophosphate indicated in general formula (I); (C) a fatty acid amide; and (D) a polyhydric alcohol ester. (In the formula, R1-R4 each independently indicate one type selected from a C6-20 linear, branched, or annular alkyl group and a C6-20 linear, branched, or annular alkenyl group.)
Description
technical field [0001] The present invention relates to a lubricating oil composition for a shock absorber and a method for reducing the friction of the shock absorber. More specifically, the lubricating oil composition of the present invention is a lubricating oil composition suitable for a shock absorber (hereinafter sometimes referred to as a shock absorber) constituting a suspension of an automobile body. Background technique [0002] In the body of automobiles such as two-wheeled vehicles and four-wheeled vehicles, suspensions incorporating shock absorbers (shock absorbers) are used to alleviate vibrations caused by unevenness of the road surface, vibrations caused by sudden acceleration and sudden braking, etc. . The basic structure of the shock absorber is a cylindrical structure that utilizes the flow resistance of oil. Specifically, as a shock absorber, a shock absorber having a small hole in a hydraulic piston is used. The oil passes through the hole as the pist...
Claims
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IPC IPC(8): C10M169/04C10M101/02C10M129/76C10M133/16C10M137/10C10N10/04C10N20/02C10N30/06C10N30/08C10N40/06
CPCC10M141/10C10M169/04C10M2203/1006C10M2207/283C10M2207/289C10M2209/084C10M2215/082C10M2223/045C10M2229/051C10N2010/04C10N2030/02C10N2030/06C10N2030/08C10N2030/10C10N2040/08C10M101/02C10M129/76C10M133/16C10M137/10
Inventor 坂上众一青木亚弥
Owner IDEMITSU KOSAN CO LTD