| 摘要 |
PURPOSE:To obtain a lubricating oil compsn. preventive of wearing of an aluminum material, an iron-material, a steel material, etc., used in abrasive sites by adding a specific wear-proofing agent to a predetermined mineral oil and/or synthetic oil. CONSTITUTION:A mineral oil and/or synthetic oil having a viscosity of 10 to 500mm<2>/s at 40 deg.C (e.g. an ester of polyol) is admixed with 0.05-10wt.%, at least one wear-proofing agent of formula (1)-(3) (R is lower alkylene; R1-R4 is each H or a 1-20C hydrocarbon group; X is O or S; and Y is S or none; provided that R1 and R2 in the formula (1) may be directly linked with P without X therebetween) [e.g. n-octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide] to obtain the title lubricating oil compsn. |
