POLYOLEFIN INTUMESCENT PHOSPHOROUS FLAME RETARDANT SYSTEM

摘要

A flame retardant polypropylene compound is disclosed. The compound comprises a polypropylene and non-halogenated ammonium phosphate flame retardant, along with ethylene vinyl acetate, magnesium hydroxide; fluoroelastomer and other functional additives. The compound can achieve a UL 94 rating of V-0 at a thickness of 1.55 mm or greater.

主权项

1. A flame retardant polyolefin compound, comprising:
(a) ethylene vinyl acetate in an amount ranging from about 18 to about 23 weight percent of the compound; (b) polypropylene copolymer in an amount ranging from about 21 to about 26 weight percent of the compound; (c) ammonium polyphosphate in an amount ranging from about 35 to about 50 weight percent of the compound; (d) magnesium hydroxide in an amount ranging from about 1 to about 2 weight percent of the compound; (e) fluoroelastomer in an amount ranging from about 0.25 to about 0.35 weight percent of the compound; (f) optionally, alpha-olefin copolymer in an amount ranging from 0 to about 12 weight percent of the compound; and (g) optionally, N,N-ethylene bis-stearamide in an amount ranging from 0 to about 2 weight percent of the compound,
wherein the ammonium polyphosphate is treated with melamine and coated with an aliphatic thermoplastic polymer having amine group end groups.