206results about How to "Good fluidity at low temperature" patented technology

The invention provides a low-temperature lubricating grease composition and a preparation method thereof. The composition is prepared from base oil, a thickening agent and an additive. The lubricating grease is prepared from a novel thickening agent system and base oil with excellent low-temperature property, so that the lubricating grease has excellent low-temperature fluidity, corrosion and rust resistance and extreme-pressure abrasion resistance; since organic bentonite has a relatively good low-temperature rheological property and does not have phase transformation in the process of forming grease, the denseness of the lubricating grease is not remarkably influenced in temperature changes, the lubricating grease cannot be hardened at a low-temperature environment at -40 DEG C, and the pumping continuity can be ensured. The lubricating grease can be used for breaking through the lubricating management concept of different grease using in winter and summer, which is generally used by large-sized engineering machinery in 'Three-North' regions, so that innovation of universal application of the grease in winter and summer can be realized, and maintenance cost and labor intensity of clients can be reduced.

Disclosed is a lubricant composition for fluid dynamic bearings which contains, as a base oil, 50-100% by mass of an ether compound having at least one ether bond and 11-34 carbon atoms, and has a kinematic viscosity at 100 DEG C of not less than 2.2 mm2 / s. Such a lubricant composition for fluid dynamic bearings has good low-temperature fluidity and such excellent viscosity characteristics that viscosity decrease is small even in the high temperature range. The lubricant composition further has low evaporativity, energy saving properties and heat resistance stability, and is thus suitable for compact fluid dynamic bearings which are rotated at high speed.

The invention discloses ultralow temperature ash-free antiwear incombustible ester type hydraulic oil, a production technology and application thereof. The ultralow temperature ash-free antiwear incombustible ester type hydraulic oil is prepared from a viscosity index improver, a pour point reducer, an emulsion breaker, a defoaming agent, an antiwear reagent at extreme pressure, an ash-free detergent dispersant, an antirust agent, an antioxidant, a fire retardant and base oil. The ultralow temperature ash-free antiwear incombustible ester type hydraulic oil has the advantages that firstly, theoil has the extremely stable molecular structure, and the good oxidation stability; secondly, the oil has the extremely good lubricating performance and antiwear performance, and can effectively prolong the life of an engine; thirdly, the oil has the low temperature fluidity so that the engine can be easily started; fourthly, the oil has the good high temperature high shearing performance, the volatile loss at a high temperature is less, and the oil film tenacity and strength of an oil product at the high temperature are ensured; fifthly, the viscocity and the lubrication of the oil can be maintained after a ultralong driving process; sixthly, the oil has the good detergent dispersing performance, and the dust deposition amount is less after the oil is used for a long time; seventhly, theoil has the good biodegradability; and eighthly, the oil has low condensation point and can be widely applied to bad working environments such as low temperature and cold.

The invention discloses an open gear lubricating oil, which is characterized by the following: adopting synthesized oil as basic oil; making polyplant oil as thickener; adding auxiliary thickener, extreme-pressure agent, antirust agent and anti-oxidant; possessing excellent stickiness and low-temperature fluidity.

A lubricating oil for non-stage transmissions characterized by comprising a base oil comprising a combination of a synthetic oil (I) having (a) a coefficient of traction at 120 DEG C of at least 115% of that of 2,4-dicyclohexyl-2-methylpentane, (b) a viscosity at -40 DEG C not higher than that of 2,4-dicyclohexyl-2-methylpentane (260 Pa s), and (c) a viscosity index of 65 or higher and a synthetic oil (II) having a viscosity at -40 DEG C of 1 Pa s or lower. It is further characterized in that the base oil satisfies specific properties. The lubricating oil for non-stage transmissions has a high coefficient of traction even at high temperatures and has satisfactory low-temperature flowability. It is hence suitable for use as a lubricating oil for non-stage transmissions for motor vehicles.

The invention provides a composite lubricating oil suitable for low temperature environment, and a preparation method thereof. The composite lubricating oil concretely comprises 60-65 wt% of GTL, 4-6 wt% of ester oil, 8-12 wt% of PAO, 10-15 wt% of a composite additive, 5-10 wt% of a viscosity index improver and 0.5-1.5 wt% of organic molybdenum, and the total amount of above components is 100%. Natural gas synthetic oil is used as base oil, and is compounded with the ester oil and the PAO, the organic molybdenum and other additives are added, and the additives have good solubility in the lubricating oil, and avoid aggregated granules; the lubricating oil has excellent low-temperature fluidity, and makes engines smoothly started at -35 DEG C; the lubricating effect of the lubricating oil is greatly improved; and the lubricating oil can be applied to diesel engine oils of large vehicles in low temperature environment, improves the low-temperature flowing effect, and alleviates the problem of low-temperature cold starting of the vehicles.

Disclosed is a lubricant composition for internal combustion engines which comprises a base oil containing at least one substance selected from an a-olefin oligomer having 16-40 carbon atoms which is obtained by oligomerizing an a-olefin having 2-20 carbon atoms by using a metallocene catalyst, a hydrogenated product of such an a-olefin oligomer, an a-olefin oligomer having 16-40 carbon atoms which is derived from an a-olefin dimer obtained by using a metallocene catalyst, a hydrogenated product of such an a-olefin oligomer and the like. This lubricant composition for internal combustion engines is excellent in low-temperature fluidity, while having low evaporativity and good oxidation stability.