| abstract |
FIELD: chemistry. n SUBSTANCE: present invention relates to a lubricating oil composition containing base oil and as component (a) from 0.5 to 1.5 wt% of mono- or diester of glycerol and straight-chain or branched fatty acid with 6 to 20 carbon atoms, having saturated hydrocarbyl group; as component (b) 0.1–0.5 wt% triazole derivative of general formula (1), where R 1 represents hydrogen or hydrocarbyl group with 1–3 carbon atoms, R 2 and R 3 respectively independently represent hydrogen or hydrocarbyl group with 1–20 carbon atoms; and component (c) from 0.01 to 0.2 wt% in terms of phosphorus mixture of primary zinc dialkyldithiophosphate, alkyl group of which is a primary hydrocarbyl group, and secondary zinc dialkyldithiophosphate, alkyl group which is a secondary hydrocarbyl group; wherein ratio of component (a)/component (b) ranges from 1.5 to 8. n EFFECT: obtaining a lubricating oil, corresponding to environmental standards, as well as with improved effect of reducing friction and corrosion protection effect, with low content of ash, phosphorus and sulphur. n 16 cl, 3 tbl n (1) |