LUBRICANT COMPOSITION HAVING IMPROVED ANTIWEAR PROPERTIES Russian patent published in 2016 - IPC C10M141/10 C10M161/00 

FIELD: chemistry.

SUBSTANCE: present invention relates to a lubricant composition with improved anti-wear properties, measured on a four-ball machine containing: base oil in amount, greater than 85 wt% of weight of said lubricant composition; one or more corrosion inhibitors based on alkylethercarboxylic acid of formula (I), where R is C₆-C₁₈ alkyl group with an unbranched or branched chain, and n is a number from 0 to 5; and ashless antiwear phosphorus-containing additive selected from (1) butyltriphenyl phosphorothionate, (2) nonyltriphenyl phosphorothionate, (3) amine phosphate and ditridecylamine, (4) neutral dialkyl dithiophosphate, (5) isopropyl phosphorodithioate and ditridecylamine, (6) acidic dialkyl dithiophosphate and (7) acidic dialkyl dithiophosphate and ditridecylamine and combinations thereof, where antiwear properties, measured on four-ball machine are presented in form of average diameter of wear spots in accordance with a standard by ASTM D4172 method, where average diameter of wear spots is at least 7 % less than average diameter of wear spots caused by a standard, containing said base oil, antiwear additive and said one or more corrosion inhibitors based on alkylethercarboxylic acid, where said lubricant composition contains less than 1 wt% water, where said lubricant composition contains from 0.01 to less than 0.1 wt% of said one or more corrosion inhibitors based on alkylethercarboxylic acid, and where said lubricant composition contains an antioxidant. Present invention also relates to a method of making a lubricant composition and a method of reducing wear of metal.

EFFECT: obtaining a lubricant composition with excellent anti-wear and anticorrosion properties.

20 cl, 6 tbl

(I)