mercury oils

Silicon Oils

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Silicon Oils

Technical grade Silicon Oils

Description
Silicon Oils are clear, white, inert and odourless dimethyl polysiloxane fluids. The actual viscosity is controlled within +5% of the desired viscosity. These fluids are manufactured in the viscosity range from 20 cps to 300.000 cps.
In chemical structure Silicon Oils are quite different from other fluids having a backbone of silicon-oxygen linkage. The advantage of this is a linkage much stronger than a typical carbon- carbon chain and is more resistant to attack by temperature extremes, oxidation, shear stresses and chemicals than other similar organic fluids and also show good dielectric properties Silicon Oils are soluble in hydrocarbon solvents, chlorinated hydrocarbon solvents and low molecular weight aromatic solvents. They have limited solubility in alcohols, ethers, acetone and glycols (solubility here depending on viscosity).
Applications
Silicon Oils have numerous applications in almost every industry:

  • Cosmetics and pharmaceuticals (Creams/lotions/hair care contraceptives)
  • Polishes high gloss for automobile and furniture)
  • Release agent (plastic/rubber/non- ferrous die casting)
  • Liquid springs and shock absorbers
  • Heat transfer
  • Power transmission
  • Rust prevention
  • Hydraulic fluids
  • Dielectric fluids
  • Damping
  • Water repellence for aerated cement slabs/bricks
  • Paint and coating Additives
  • Lubricants
  • Textile finishing
  • Spinneret cleaner

Benefits
The unique chemical structure permits silicone fluids to perform in applications where other fluids are not suitable.

  • Low viscosity/temperature coefficient: they exhibit a smaller degree of change over a wider temperature range than petroleum oils (over 50 times more constant)
  • Thermal stability: silicone fluids show excellent stability when exposed to high temperatures. They are stable from -57 °C to 200 °C for extended periods and can exceed this for short periods
  • Oxidation stability: oxidation stability of these fluids is excellent up to 200 °C where sludging is eliminated that occurs with mineral oils above 150 °C
  • Chemical inertness: they are chemically inert to most common materials

Typical performance data

Technical grade dimethyl silicone fluids 20 50 100 350 500 1000 10000 60000 1000000
Appearance, clarity and odour Colourless, clear and odourless
Specific gravity @ 25 °C 0.940 0.959 0.965 0.973 0.970 0.974 0.975 0.977 0.976
Nominal viscosity @ 25 °C, cPs 20 50 100 350 500 1000 10000 60000 1000000
Refractive index @ 25 °C 1.405 1.402 1.405 1.405 1.403 1.405 1.405 1.405 1.404
Flash point open cup, °C 230 280 >300 >300 >300 >300 >300 >300 >300
Pour point, °C -60 -55 -55 -50 -50 -50 -50 -50 -40
Auto ignition temperature, °C >400 >400 >400 >400 >400 >400 >400 >400 >400
Dielectric Strength @ 25°C,
volts/mil
- 400 400 400 - 400 - - -
Volume Resistivity @
25°C, ohm-cm
- 1.0x1015 1.0x1015 1.0x1015 - 1.0x1015 - - -

 

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