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Master Bond rolls condensation cured silicone

Posted: 04 Jun 2008 ?? ?Print Version ?Bookmark and Share

Keywords:condensation cured liquid silicone? encapsulation? voltage regulators?

A two part, condensation cured liquid silicone system called Master Sil 150 has been developed by Master Bond Inc. It can be used for the potting and encapsulation of voltage regulators, high voltage transformers, as well as optical and electronic assemblies. Master Sil 150 has good thermal stability combined with excellent flexibility. It has a Shore A hardness of 40 and its elongation at break is 230 percent. Low viscosity ensures complete fill-in around complicated parts to provide excellent electrical insulation and resistance to shock. The coefficient of thermal expansion is 11x10-4cm/cmC and its linear shrinkage is less than 0.4 percent.

Upon the addition of the curing agent, Master Sil 150 cures at room temperature to a tough, resilient silicone rubber. Its unique mechanical and electrical properties protect sensitive electronic components and assemblies from dust, moisture, ozone, thermal shock and vibration. Master Sil 150 has a service temperature range from -50C to over 205C (-55F -400F). Its excellent thermal conductivity, 7.5 x 104cal/cm.s C (2.2 BTU-inch/hour-ft? -F) highly facilitates its use in potting and encapsulation applications. The electrical insulation properties include a volume resistivity of 5 x 1014cm, a dielectric strength of 18kV/mm together with a 2.9 dielectric constant and 3 x 103 dissipation factor at 1MHz. Master Sil 150 will cure in contact with virtually all types of materials without inhibition.

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