Properties: Dimethicone is a transparent, colorless, tasteless, odorless, non-toxic oily liquid. It has the characteristics of high flash point, low freezing point, good thermal stability, and high and low temperature resistance.
It can be used for a long time at -50°C-+180°C, for example, the long-term use temperature can reach 200°C in the isolation of air or in an inert gas.
The surface silicon tension of the oil is very small, the compressibility is large, the shear resistance is good, the viscosity-temperature coefficient is small, the dielectric loss is small; it is resistant to electric arc, corona, non-flammable; it is hydrophobic and moisture-proof, and it also has good physiological inertia.
Physical and chemical properties: Dimethicone is also known as methyl silicone oil and polydimethylsiloxane liquid. Colorless transparent viscous liquid.
Tasteless, odorless and non-toxic.
The molecular formula is CH3[Si(cH3)2]nSi(CH3)3. The average molecular weight is 5000~Chemicalbook100000.
Depending on the molecular weight, the kinematic viscosity ranges from 1.0×10-6 to 100000×10-6 square meters per second. The long-term use temperature range is -50~180°C, and it can be used for a long time at 200°C under the condition of isolated air or in an inert gas.
The viscosity coefficient is 0.31~0.61. The surface tension is 1.59~2.15×10-4N/cm. Dielectric constant (23ºC, 100Hz) 2.18~2.17. Volume resistivity (23°C) 1.0×1014~1.0×1016Ωcm3.
Dielectric loss tangent (23°C, 100Hz) 0.00002~0.00004. Breakdown voltage strength 13.7~17.7kV/mm
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