Fire retardant blend of interpolymer composition, chlorinated vinyl chloride polymer and vinyl chloride polymer.

摘要

A flame retardant blend having good impact resistance and a high heat deflection temperature comprising (1) a predominant amount of an interpolymer comprising: (a) crosslinked C2-C10 alkyl acrylate or C@-C22 alkyl methacrylate or mixtures thereof; (b) crosslinked styrene-acryonitrile- and (c) uncrosslinked styrene-acrylonitrile components;
2) a vinyl chloride homopolymer or vinyl chloride copolymer with a comonomer polymerizable therewith, wherein vinyl chloride is the predominant monomer,
(3) a chlorinated vinyl chloride or vinyl chloride copolymer as defined in (2). This blend is particularly useful for use as an outdoor construction material.