Physically, silicones are based on silicon, an element
derived from quartz. To create this class of synthetic
elastomers, pendant organic groups such as methyl,
phenyl and vinyl are attached to silicon atoms. The
different additions of side chains can achieve significant
variations in properties. Silicones have excellent
heat, ozone and corona resistance, are very well dielectric
stability, and resistant to many oils, chemicals,
and solvents. Silicones possess the best flexible
property at low temperatures, but it also has some
weakness like low tensile strength, poor tear strength
and wear resistance.
For Silicones the service temperatures are from -60
C to 225 C. Some special types can be used in extreme
temperature up to 300 C and down to -100 C.
25 to 90 Shore A are available.
Black, brown, green, white, rust, yellow, blue, red,
orange, transparent and gray are available, or any
assigned color from customers.
Silicone rubber performs well under environmental
and temperature extremes. It is usually applied in
automotive and aerospace industries where flexibility
and longevity are important. It also has outstanding
electrical insulating properties where applying strict
performance standards are critical. It is also a suitable
material for parts that need FDA approval for food
handling equipment and appliances.