Hydraulic oil composition

The present invention provides a hydraulic oil composition comprising: a lubricant oil base oil which has a kinematic viscosity of 15 to 50 mm2/s at 40 DEG C and a viscosity index of 125 or less and contains an aromatic component in an amount of 1 mass% or more; and a polymethacrylate which is conta...

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Bibliographic Details
Main Author YAGISHITA KAZUHIRO
Format Patent
LanguageEnglish
Published 09.12.2015
Subjects
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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Summary:The present invention provides a hydraulic oil composition comprising: a lubricant oil base oil which has a kinematic viscosity of 15 to 50 mm2/s at 40 DEG C and a viscosity index of 125 or less and contains an aromatic component in an amount of 1 mass% or more; and a polymethacrylate which is contained in an amount of 1 to 40 mass% relative to the whole amount of the hydraulic oil composition and has a number average molecular weight of 28000 or less.
Bibliography:Application Number: CN201480021160