SYNTHETIC ESTER COMPOSITION (VARIANTS) AND LUBRICANT OIL WITH ITS APPLICATION (VARIANTS) Russian patent published in 2003 - IPC

FIELD: lubricant materials. SUBSTANCE: composition represents product of interaction of linear or branched alcohol of the general formula R(OH)_n, wherein R means aliphatic or cycloaliphatic group comprising from about 2 to 20 carbon atoms and n means at least 2 and at least one linear or branched C₅-C₁₀-acid or mixture with linear C₁₂- acid being hydroxyl number of the composition is about above 5 up to 100, preferably, about from 10 to 80. Composition can contain additionally residues of polybasic acid and monohydric alcohol. Preferably, composition contains additionally residues of branched C₄-C₂₀-acid. Lubricant oil comprises at least one ester composition and package of addition agents. Invention provides the enhancement of thermostability and resistance against oxidation, reducing friction coefficient and wear. EFFECT: improved and valuable properties of composition. 43 cl, 12 tbl, 5 dwg, 9 ex