LUBRICATING OIL COMPOSITION FOR INTERNAL-COMBUSTION ENGINE

LUBRICATING OIL COMPOSITION FOR INTERNAL-COMBUSTION ENGINE

PROBLEM TO BE SOLVED: To obtain a lubricating oil composition for internal-combustion engines having low volatility at high temperatures, and at the same time, having good low-temperature viscosity property by using a base oil satisfying specific properties and index. SOLUTION: A base oil satisfying...

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Bibliographische Detailangaben
1. Verfasser: KOGANEI KATSUYA
Format: Patent
Sprache:eng
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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Zusammenfassung:PROBLEM TO BE SOLVED: To obtain a lubricating oil composition for internal-combustion engines having low volatility at high temperatures, and at the same time, having good low-temperature viscosity property by using a base oil satisfying specific properties and index. SOLUTION: A base oil satisfying formulae I and II [GCD5-50 is the difference ( deg.C) between the 5%-distillation temperature and the 50%-distillation temperature in gas chromatography distillation; KV40 and KV100 are kinetic viscosities (mm2/s) at 40 deg.C and 100 deg.C, respectively; A is -3.17×1O-3, B is 2.87; C is -3.78×10-4, D is 4.91×10-1; E is 9.41; F is 2.09×10-1] is used. A base oil additionally satisfying either formula III or formula IV is further preferable.