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
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Embodiment 1～12、 comparative example 1～3
[0249] 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.
[0250]
[0251]
[0252] The following evaluation tests were carried out for each composition obtained:
[0253] (Measurement of lead dissolution over time by NOx absorption test)
[0254] Under the conditions (140°C, NOx: 1185ppm) in accordance with the Japanese Tribology Conference Draft Collection 1992, October, 465, NOx gas was blown into the test oil containing the copper piece, and the amount of lead eluted over time during forced deterioration was measured. Variety. The smaller the amount of eluted lead, the more suppressed the corrosion of lead. In addition, by the forced degradation of the NOx absorption test, the degradation of lubricating oil, especially the influence of degradation products accompanying the degradation of lubricating oil for internal combustion engine...
Embodiment 13～21、 comparative example 4
[0261] 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.
[0262]
[0263] The following evaluation tests were carried out for each composition obtained:
[0264] (Changes over time of lead leaching measured by NOx absorption test)
[0265] According to the NOx absorption test, the change of lead dissolution with time was determined in the same manner as in Table 1.
[0266] (Evaluation results)
[0267] The composition of Comparative Example 4 in Table 2 is a composition that does not contain both a borate ester and an organic molybdenum compound, and the amount of lead eluted at 140° C. is very large.
[0268] The compositions of Examples 13 and 14 in Table 2 are compositions containing borates, the compositions of Examples 15 to 20 are compositions containing both borates and organic molybdenum compounds, and the compositions of Example 21 a...
Embodiment 22～29、 comparative example 5
[0270] 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.
[0271]
[0272] The following evaluation tests were carried out for each composition obtained:
[0273] (Changes over time of lead leaching measured by NOx absorption test)
[0274] The NOx absorption test measures the change of lead dissolution over time according to the situation in Table 1.
[0275] (Evaluation results)
[0276] The composition of Comparative Example 5 in Table 3 is a composition containing only boric acid-modified succinimide, and the amount of lead eluted at 140°C is 520 mass ppm and 4200 mass ppm after 48 hours and 70 hours, respectively. , are very many.
[0277] The compositions of Examples 22 to 28 in Table 3 are compositions containing both an organic molybdenum compound and a boric acid-modified alkenyl succinimide. In these examples,...
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Abstract
Description
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