| Customization: | Available |
|---|---|
| CAS No.: | 63148-58-3 |
| Formula: | Si |
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Super vacuum diffusion pump oil
Chemical Name: Poly methyl phenyl siloxane
Synonyms:
High vacuum diffusion pump oil
CAS NO.: 63148-58-3
Description
Phenyl Methyl Silicone Oil is colorless transparent liquid. Compared with Dimethyl silicone oil, it has better performance in high and low temperatures (-70 ~ 300°C ), and better properties of lubricity, mold unloading and electrical insulation. It is small in temperature viscosity coefficient and volatility. Compression rate and the surface tension is high. It is well in miscibility with other organic resin. The UV-resistant properties is unique.
Features:
1. The saturation steam pressure of high vacuum diffusion pump oil is very low. When conditions for used equipment (including diffusion pumps and backing pumps) (such as vacuum tightness, front stage vacuum, cooling water status, etc.) all meet with vacuum operation conditions,the ultimate vacuum (residual pressure) of 274 can reach 5.3x10-6Pa; the ultimate vacuum (residual pressure) of 275 can reach 6. 65 x 10-7Pa. If a special cold trap is adopted, this value can be increased to1. 33X 10-8Pa.
2. The highest vacuum ultimate permissible -level permits for the highest level of permission
Organic high vacuum diffusion pump oil is not harsh on the maximum permits of real-level pumps, generally the level of 1.33-13. 3Pa. Commonly, mechanical pumps have this ability. Specifically, the highest vacuum front stage permissible residual pressure of 274 is 13.3 PA, while that of the 275 is 5.32 PA.
3. Absorption capacity: The exhaust speed of the silicone high vacuum diffusion pump is very high. When the entry pressure is 1.33 x (10-1-10-3) PA, the absorption capacity reaches the maximum value. At this time The speed can reach more than 300T/SEC. The absorption capacity is greatly affected by the diffusion pump model and working conditions. Be sure to pay attention when using it.
4. Anti -diffusion
Anti -diffusion is closely related with the model of diffusion pump oil, the model of pump, and working conditions. When other conditions are determined, the anti-diffusion of 274 is about (1. 1-1.4) x 10-4kg. S-L.M-2, 275's anti-diffusion is approximately (0.83-1. 1) x 10-4kg. S-1. M-2O
5. Thermal stability and oxidation stability
The antioxidant and thermal stability of the silicone diffusion pump oil is very good.Not easy to break down under the working temperature. In this way, it not only reduces the times of the diffusion pump oil replacement, but also not easy to cause pollution to the pump body. During the process, the heated oil even exposed to the air many times will not be decomposed.
Technical Index:
| Items | Standard |
| Appearance | Colorless or yellowish transparent oily liquid |
| Dynamic viscosity(25°C) , mm2/s | 165-185 |
| Flash point(°C, >) | 243 °C |
| Refractive rate(25C) | 1. 5765-1. 5785 |
1. For electrical and electronic industries, the product can be used in the vacuum systems for metal coating for the manufacture of TV visual pipes, sunlight pipes, cathode ray tubes, ordinary light bulb and electrical 27 capacitor rectifier.
2. For metallurgical industry, ultra -pure silicone production equipment, vacuum melting plants and vacuum -reinforcement plants, the methyl phenyl silicone oil can be used in the vacuum system of metal degassing equipment.
3. For optical product industry, such as, used in the vacuum system for optical systems such as the surface treatment of various lenses and the vacuum coating of various lenses surfaces.
4.For the plastic industry, used in metalization, preparation of protective coatings and reflective coatings for plastic products.
5. Used in other industries, such as, in particle accelerators, molecular distillers, reactors, scientific research equipment, mass spectrometer and spatial simulation room for nuclear engineering.
6. As high -temperature thermal carriers and transmission fluids in various other equipment and instruments.
Packing:
Phenyl Methyl Silicone Oil is available in 5kg plastic drums, 25kg plastic drums, 25kg Iron drums or200kg Iron drums.
Storage:
1.The product should be stored in a shady, dry place with the temperature 0°C-40°C, freezing should be avoided.
2. Avoid from acid, alkali chemical materials and other impurities.
3. Handle as non-hazardous substance.
4. Shelf life: 3 years.
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