Gelest Silicone Fluids - Gelest Inc.

▲
▲
▲
▲
Gelest, Inc.
Low Volatility
PolyDimethylsiloxanes
Volatile, low molecular weight components are present in
polydimethylsiloxanes as a consequence of the equilibrium
polymerization utilized in their manufacture. Typically, silicones
with viscosities below 50 cSt. have >10% volatiles,
while those with viscosities greater than 50 cSt. have 0.5-4.0%
volatiles. Low molecular weight components can impart undesirable
effects in certain critical applications. These include
outgassing, migration and, in contact with certain plastics and
rubbers, bleed, plasticization and stress-cracking.
Devolatilized silicones are offered in two classes. Reduced
Volatility Silicones have >90% low-molecular weight components
removed and are generally acceptable for polymer contacting
applications. Extreme Low Volatility Silicones have virtually
zero volatiles and are suitable for extreme vacuum
applications including systems deployed in space exploration
and communication. An example of a space application is as
a damping fluid for solar panels.
Volatile Cyclic
PolyDimethylsiloxanes -
Cyclomethicones
Low molecular weight silicone that possess a cyclic structure
rather than a chain structure serve as volatile carriers for a
variety of formulations. Low heats of vaporization and the
ability to select a desired vapor pressure has led to their use
as cosmetic vehicles. While most display a broad range of
liquid behavior, the most volatile cyclic dimethylsiloxane, D3,
is a solid at room temperature.
Reduced Volatility PolyDimethylsiloxanes
% volatiles measured after 24 hours at 125°C in air
Product Code Viscosity % Volatiles Price/1kg
DMS-T07R 7 8 $120.00
DMS-T12R 20 0.5 $110.00
DMS-T21R 100 0.05 $110.00
Extreme Low Volatility PolyDimethylsiloxanes