Intumescent flame retardant systems

Details Intumescent flame retardant systems Intumescent flame retardant systems

C - Chemistry, Metallurgy

08

L

400/5053, 403/68

C08L 27/18 (2006.01) C08J 9/00 (2006.01) C08K 3/32 (2006.01) C08K 5/3477 (2006.01) C08L 23/12 (2006.01) C09K 21/14 (2006.01)

Patent

CA 2007510

ABSTRACT This invention is that of a flame retardant additive composition for polymers comprising an ammonium or amine phosphate (50 - 95%), a hydroxyalkyl isocyanurate (5 - 50%) and a minor amount of polytetrafluoroethylene (0.3 - 9%). Optionally, the flame retardant additive composition may contain as a fourth component, a blowing agent (5 - 40%) such as urea, melamine, glycine etc. Preferred components are ammonium polyphosphate, tris-(2-hydroxyethyl) isocyanurate and polytetrafluoroethylene. The flame retardant additive composition may be used to impart flame retardancy to synthetic hydrocarbon polymers, in particular polypropylene and polyester - polyether copolymers wherein said additive is employed in an amount of about 5 to 50 percent based upon the total weight of polymer and additive.

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