Silicone oil is a liquid polyorganosiloxane with excellent high and low temperature resistance, chemical stability, shear resistance, viscosity-temperature characteristics and high compression ratio. Silicone oil-based vibration damping products are widely used in electrical and electronic equipment, high-rise buildings, bridges, and weapon platforms, and a large number of related patents have been applied for abroad, while domestic research in this area is still relatively small.
Silicone oil-based damping fluid damping in a wide range of temperature and frequency range of damping performance stability, which requires silicone oil has a small viscosity temperature coefficient. In order to further improve the damping performance of silicone oil, it is often necessary to add a certain amount of filler viscosity, the added filler requirements in the silicone oil for a long time to maintain the non-sedimentation, and the requirements of the viscosity of the damping fluid in a certain range of shear rate change is small.
Methyl silicone oil with the increase in temperature, the viscosity of high viscosity methyl silicone oil viscosity change coefficient with the viscosity of the viscosity of the increase in line with the rise. In addition, as the temperature rises, the viscosity of methyl silicone oil in the low-temperature section of the change is large, while in the high-temperature section of the change is increasingly small. Therefore, methyl silicone oil is a suitable damping material for use at higher temperatures. The effect of the molar mass of methyl silicone oil and its distribution on its viscosity-temperature properties. The viscosity-temperature coefficient of methyl silicone oil does not necessarily increase with the viscosity, when the viscosity-temperature coefficient of methyl silicone oil is the same, the viscosity of high silicone oil, the distribution of its molar mass is wide. Methyl silicone oil viscosity temperature coefficient with the increase in molar mass and become larger is contradictory, but in fact, due to the general molar mass of methyl silicone oil has a certain distribution, is polydisperse, which indicates that the viscosity temperature coefficient and the distribution of molar mass is also related to the viscosity temperature coefficient and the distribution of the molar mass of the relationship between the viscosity temperature coefficient and the distribution of the molar mass needs to be further studied. Therefore, different viscosity methyl silicone oil can be formulated with different viscosity methyl silicone oil with lower viscosity-temperature coefficient of the required viscosity methyl silicone oil according to different proportions of the proportion as the base oil of the damping fluid.
In order to further improve the damping performance of the damping fluid, it is necessary to add a certain amount of viscosity-increasing fillers to the methyl silicone oil. Commonly used fillers include calcium carbonate, diatomaceous earth, silica and polymethylsilsesquioxane powder. Regarding the non-silicon series of fillers on the damping fluid viscosity, ultrafine calcium carbonate on the viscosity of methyl silicone oil is the best effect, which is closely related to the ultrafine calcium carbonate specific surface area is large. But even with ultrafine calcium carbonate as a viscosity builder, when placed for more than 60 days, there is still methyl silicone oil precipitation delamination phenomenon, so these fillers are not the most suitable for silicone oil viscosity.
Silicon filler silica on the damping fluid performance, damping fluid damping performance to be stable at different shear rates, which requires the viscosity of the damping fluid in a certain range of shear rate change is small. The effect of rotor speed on the dynamic viscosity of damping fluid containing different silica with methyl silicone oil as the base material.
CONCLUSION: Different viscosities of methyl silicone oil can be used to formulate the desired viscosity methyl silicone oil with low viscosity-temperature coefficient, and the addition of polymethylsilsesquioxane powder can prepare a damping fluid whose damping performance remains stable under a certain range of shear rates.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150A. 
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.