New sulfur-containing organophosphorus compounds of general formulae (I) and (II) and processes for producing the same; additives for lubricating oils, which contain the sulfur-containing organophosphorus compounds; and lubricating oil compositions satisfying requirements of extreme-pressure lubrication and abrasion resistance under severe conditions of high loads imposed, on automatic or continuously variable transmissions or the like. In said formulae, R1 is a hydrocarbon group having 6 to 20 carbon atoms; R2 is a divalent hydrocarbon group having 1 to 6 carbon atoms; n is an integer of 1 to 3; p is an integer of 0 to 2; and q is an integer of 0 or 1, with the proviso that p and q cannot be 0 at the same time.
通式(I)和(II)的新
硫含有机
磷化合物及其制备方法;含有
硫含有机
磷化合物的润滑油添加剂;以及在高负荷条件下对自动或连续变速传动或类似装置进行极压润滑和耐磨性要求的润滑油组合物。在上述式子中,R1是具有6至20个碳原子的碳氢基团;R2是具有1至6个碳原子的二价碳氢基团;n是1至3的整数;p是0至2的整数;q是0或1的整数,但p和q不能同时为0。