COMPOSITION OF SULFONATE ADDITIVE WITH LOW ALKALI NEUTRALIZATION NUMBER TO LUBRICATING OILS Russian patent published in 2000 - IPC

FIELD: chemical industry, more particularly preparation of compositions of sulfonate additive to lubricating oils. SUBSTANCE: composition comprises calcium sulfonate, calcium carboxylate and diluent. Composition comprises at least 10 wt % of at least one sulfonate obtained by neutralization of sulfonic acid number average number molecular weight of which is 500 or more and which is oil-soluble synthetic sulfonic acid or alkarylsulfonic acid. Kinematic viscosity of composition is 700 cst or less at 100 C and composition comprises 0.5 wt % or less of hydroxide in terms of calcium hydroxide, and chloride content is 100 wt ppm or less. Composition has low viscosity, low alkali neutralization number and improved anti-wear properties and when exposed to air, it forms no film. EFFECT: improved ecology due to lower content of chlorides. 9 cl, 5 tbl