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Producing Flame Retardant Adhesives

SpecialChem / Jun 3, 2009

Adhesives are largely comprised of the kind of organic chemicals that have a reputation for flammability, yet they are used in many environments where they may be exposed to burning. By using the right adhesive formulations it is possible to not only reduce flammability, but also how to approach the highest levels of flame retardancy, as specified by the Underwriter's Laboratory.Given a fire hot enough, any adhesive will burn. However, by holding its form and maintaining a barrier even as adhesives are degraded by heat they may help stem its passage. While thermoplastic adhesives melt readily with heat, thermosetting and reactive adhesives can survive much higher temperatures, but are still not "flame retardant" on their own. Even polyimides, which come at high cost because of their capability to withstand high temperature, resist only 400°C, a temperature that fires can exceed greatly. A fire effectively has four stages - initial, growth, steady state and decay, with corresponding temperatures...

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