HYDRAULIC OIL FOR HIGH-DUTY HYDRAULIC SYSTEMS

FIELD: special-destination fluids. SUBSTANCE: invention relates to hydraulic oils for use in hydraulic- drive and hydraulic-control systems of machines operated in the open air at temperatures in work volume of oil from -40 to +50 C depending on the type of hydraulic pump. Oil contains, wt.%: thicke...

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Bibliographische Detailangaben
Hauptverfasser:	BELOVA T.V, AKHMETOV A.F, BAGAUTDINOV D.T, NIGMATULLIN R.G, AZNABAEV SH.T, OL'KOV P.L, MADZHAM M.T, NIGMATULLIN I.R
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMISTRY FUELS INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS LUBRICANTS LUBRICATING COMPOSITIONS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MONOXIDE USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Beschreibung
Zusammenfassung:	FIELD: special-destination fluids. SUBSTANCE: invention relates to hydraulic oils for use in hydraulic- drive and hydraulic-control systems of machines operated in the open air at temperatures in work volume of oil from -40 to +50 C depending on the type of hydraulic pump. Oil contains, wt.%: thickening additive 0.8-12.0; depressant 0.3-1.0; antioxidant 0.15-0.25, multifunctional additive 0.9-1.1; antifoaming additive, 0.002-0.004; and base oil, to 100%. The latter consists of fraction 270-420 with pour point no higher than -55 C obtained by vacuum distillation of fraction 270-420 C subjected to selective treatment with phenol or N- methylpyrrolidone and deparaffination. EFFECT: raised viscosity index and improved compatibility with rubber. 2 tbl, 12 ex