PLASTIC LUBRICATION FOR HEAVILY LOADED SLIDING FRICTION UNITS WITH IMPROVED TRIBOLOGICAL CHARACTERISTICS

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to the creation of a plastic lubricant for heavily loaded sliding friction units with improved tribological characteristics. Grease for heavy-loaded sliding friction units comprising a mixture of soaps of lithium stearate and lithium 12-hydroxystearate, including a monovalent copper oxide (cuprous oxide, Cu₂O), low molecular weight polyisobutylene, an antioxidant of the amine type, polyalphaolefin oil and an ester of pentaerythritol alcohol and synthetic fatty acids of fraction C₅-C₉, according to the invention, contains a mixture of soaps of lithium stearate and lithium 12-oxystearate in a ratio of 1:2, synthetic base oils in a 1:1 ratio, further includes a phenolic type antioxidant for synergistic enhancement of oxidation stability and lead powder to improve tribological characteristics, at the following components ratio, mass%: mixture of lithium stearate and lithium 12-oxystearate 7.5–12.5 (ratio 1:2); monovalent copper oxide (cuprous oxide, Cu₂O) 9.5–10.5; lead powder 4.0–6.0; low molecular weight polyisobutylene 1.7–2.3; antioxidant of amine type 0.25–0.35; antioxidant of phenolic type 0.25–0.35; mixture of polyalphaolefin oil with a viscosity of 4–5 cSt at 100 °C and an ester of pentaerythritol alcohol and up to 100 synthetic fatty acids of fraction C₅-C₉ (ratio 1:1).;EFFECT: invention makes it possible to obtain a grease for heavily loaded sliding friction units with improved tribological characteristics (improved antiwear and extreme pressure characteristics) and improved stability against oxidation.;1 cl, 2 tbl