Dual cure silicone polymer system

Paul Boughton

Master Bond Inc introduced a versatile, one component, UV/RTV curable silicone compound for bonding, sealing and coating called UV71DC.

While the rapid cure benefits of UV polymer systems are well known, there are complex product geometries which interdict its use.

Master Bond's UV/RTV dual cure products are formulated to react with both ultraviolet light and atmospheric humidity. When exposed to a source of UV light of appropriate wave length and intensity, it cures in seconds to produce optically clear, durable, flexible, non-yellowing and chemically resistant adhesives, sealants or coatings with excellent electrical insulation properties.

The moisture cure feature assures that the material cures successfully on complex parts where exposure to UV light is difficult or impossible to achieve. Alternatively, pure RTV cures can be accomplished within 24 hours at ambient temperatures or faster at elevated temperatures.

Master Bond's UV71DC, UV and/or RTV cured polymer system can be employed over the wide temperature range of -62degC to 205degC (-80 to 400degF). Cured adhesives exhibit a most desirable combination of properties including outstanding durability, flexibility, thermal shock resistance as well as excellent adhesion to many different substrates ranging from glass and aluminum to polyester films and polycarbonates. It has been formulated to have a refractive index of 1.41, a volume thermal expansion coefficient of 10cc/cc/degC, a tensile strength of 110 psi and a Shore A Hardness of 25.

For more information, visit www.masterbond.com


Recent Issues