Perfluoropolyether Oil

Perfluoropolyether lubricant is a synthetic lubricant with good temperature, corrosion and chemical resistance, mainly used for oil film lubrication of machinery under high temperature, high load, strong acid, strong alkali and strong oxidizing agent environment, such as turbocharger, vacuum pump and high temperature furnace.

Perfluoropolyether lubricant is usually difficult to dissolve in conventional organic solvents, including petroleum ether, benzene, toluene, acetone, ethyl acetate and so on. However, it can be dissolved by strong solvents such as benzene nitrate, trichloroethylene and chloroform. In practice, perfluoropolyether lubricants usually do not need to be dissolved and can be used directly.

Note: When handling PFPE lubricants, contact with oxygen, gaseous forms of chloride ions and fluoride should be avoided to avoid explosion or toxic gas release.

The molecular structure of PFPE lubricants and hydrocarbon lubricants is basically similar, but in the PFPE molecule the fluorine atom replaces the hydrogen atom, thus replacing the c-H bond in hydrocarbons with the stronger c-F bond. And the existence of c-o and c-c strong covalent bonds, as well as the characteristics of PFPE molecular neutrality, so that PFPE has a high thermal and oxidative stability and good chemical inertia and insulation properties. The larger molecular weight PFPE also has low volatility, a wide liquid temperature range and excellent viscosity-temperature characteristics. In addition, the key physicochemical properties of PFPE polymers include: detection stability, biological inertness, low surface energy, good lubricity and compatibility with plastics, metals and elastomers.

Properties of perfluoropolyethers

The main chain of perfluoropolyether is composed of -CF2-O-CF2- such ether chain, different from -CF2CF2CF2- perfluoroolefin chain, it has the flexural property, the The glass transition temperature is low, and the temperature range of the co-liquid (freezing point to boiling point) is extremely wide. On the other hand, due to the strong electron-absorbing effect of elemental fluorine, the polymer does not exhibit etheric properties, so it has excellent heat resistance, chemical stability, oxidative stability and complete noncombustibility.

However, this substance lacks hygroscopicity and is insoluble in organic solvents, and is only miscible in perfluoro oil or Fluoron 113 (tri-atmosphere trifluoroethane). This property makes it virtually harmless to plastics and rubber.

Perfluoropolyether has a high specific gravity but low surface tension and refractive index, possessing the characteristics of perfluorinated compounds, and is a highly transparent oil substance. It has a very high LD56 value in an oral acute toxicity test on mice and has no accumulation in living organisms, so it is almost non-toxic. However, when decomposition occurs, extremely toxic substances are produced. When using in an environment where decomposition is expected to occur, it is necessary to install air-ventilating equipment and not to take this fluorine oil lightly because it is stable.