Improvement for three-component intumescent flame retardant.

摘要

An improved flame retarded polyolefin is disclosed which comprises a combination of ammonium polyphosphate; tris(2-hydroxyethyl) isocyanurate; and melamine cyanurate; and a selected silica in an amount from .5 percent to an amount equal to one-half the amount by weight of THEIC, wherein the selected silica meets defined surface area, particle size and absorption criteria.