摘要:
The present invention relates to a lubricant composition for a high temperature of which the amount evaporated in a thin film at a high temperature is controlled and of which the fluidity is maintained for a long period of time, and it is a lubricant composition for a high temperature which is obtained by mixing a base oil composition comprising (a) 20 to 100% by weight of a specific aromatic ester and (b) 0 to 80% by weight of another base oil with (c) 0.1 to 10% by weight, based on the total amount of the lubricant composition, of an antioxidant.
摘要:
The present invention provides a lubricating composition, particularly a grease composition and a lubricating oil composition, containing an aralkylated diphenylamine and a phenol compound having a molecular weight of not less than 340 which are compounded into a base oil. The lubricating composition is hardly decomposed or volatilized even at high temperatures and has a long oxidation life so that the lubricating characteristics thereof can be maintained for a long period of time.
摘要:
A lubricating oil composition for high-temperature applications contains (A) a pyromellitate ester, (B) a sulfur-containing triazine antioxidant, and (C) a thiophosphoric acid ester antioxidant. When the lubricating oil composition for high-temperature applications according to the invention is applied to a chain, a gear, a bearing and the like, an amount of evaporation of the lubricating oil composition is restrained for a long time and fluidity thereof is also kept for a long time.
摘要:
The lubricating oil composition of the invention includes a base oil composed of mineral oil and/or synthetic oil, an amine antioxidant (A-1) in an amount of 800 ppm or more as reduced to the total amount of nitrogen, and a compound containing phosphorus and/or sulfur (A-2), The invention provides a compressor oil which realizes thermal/oxidation stability, resistance to sludge formation, lubricity, long service life, and water separation at high levels.
摘要:
Disclosed is a lubricating oil which has a low viscosity and a low vapor pressure at the same time, is free from a risk of inflammation and excellent in heat resistance. The lubricating oil has friction characteristics equivalent to those of the conventional hydrocarbon lubricating oils, and can be used for a long time under extremely severe conditions such as at high temperatures in vacuum condition. The lubricating oil contains, as a base oil, an ionic liquid which is composed of cations and anions and has an ion concentration of not less than 1 mol/dm3.
摘要:
A lubricating oil composition which comprises a base oil and incorporated therein at least one cyclic organophosphorus compound represented by general formula (I). The composition is excellent in extreme pressure properties, seizing resistance, and wearing resistance and is useful as a bearing oil, gear oil, hydraulic fluid, refrigerating machine oil, etc. (In the formula, Z represents hydrogen, alkyl, cycloalkyl optionally substituted by C1-12 alkyl and/or hydroxy, aryl optionally substituted by C1-12 alkyl and/or hydroxy, or aryl-substituted alkyl optionally substituted by C1-12 alkyl and/or hydroxy; X and X each independently represents halogeno or hydroxy; and p and q each is an integer of 0 to 3).
摘要:
A lubricating oil composition for a rotary gas compressor has a kinematic viscosity of 5 mm 2 /s or less at 100 degrees C, a flash point of 200 degrees C or more and 5 volume % distillation temperature of 350 degrees C or more. The lubricating oil composition contains at least either one of a phosphorous extreme pressure agent and an antioxidant.