FIELD: chemistry.
SUBSTANCE: present invention relates to a method of producing lignosulphonate-containing lubricants, which includes: a) a step of mixing: at least one base oil, at least one calcium soap of a saturated or unsaturated monocarboxylic acid containing 10-32 carbon atoms, optionally substituted, at least one complexing agent selected from: i) an alkali metal salt, except a sodium salt, an alkali-earth metal salt or an aluminium salt of a saturated or unsaturated monocarboxylic acid or a hydroxy carboxylic acid containing 2-8 carbon atoms, a dicarboxylic acid containing 2-16 carbon atoms, wherein each of said acids can be substituted, ii) an alkali and/or alkali-earth metal salt of boric acid and/or phosphoric acid, including products of reaction thereof with LiOH and/or Ca(OH)2, and iii) mixtures thereof, and at least calcium lignosulphonate with weight-average molecular weight higher than 10000 g/mol, heating the mixture to temperature higher than 120°C to initiate the reaction and removing low-boiling components to obtain a lubricant base, and b) a step of cooling and adding base oil and, optionally, additives while stirring. The present invention also relates to a lubricant composition and to use of the lubricant (versions).
EFFECT: use of lignosulphonates as structure-forming agents and as additives which protect from wear, reduce friction and protect from aging.
29 cl, 10 ex, 3 tbl
