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Silicone polymer react to UV light, humidity

Posted: 12 Jul 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Master Bond? UV71DC? silicone polymer?

Master Bond's UV71DC silicone polymer

Master Bond Inc. has introduced the UV71DC, a one-component, UV/RTV-curable silicone compound for bonding, sealing and coating. While the rapid cure benefits of UV polymer systems are well known, there are complex product geometries that interdict its use. Master Bond said its 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, the product 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, the company said. Alternatively, pure RTV cures can be accomplished within 24 hours at ambient temperatures or faster at elevated temperatures.

Master Bond said the UV71DC can be used over the temperature range of -62C to 205C. Cured adhesives exhibit a desirable combination of properties including outstanding durability, flexibility, thermal shock resistance as well as excellent adhesion to 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/C, a tensile strength of 110psi and a Shore A Hardness of 25.

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