AROMATIC POLYCARBONATES RENDERED FIREPROOF BY AN ALKALI SALT OF A TETRA ESTER OF IMIDODIPHOSPHORIC ACID

摘要

A fire-resistant polycarbonate composition comprising a polycarbonate and for each one thousand parts by weight thereof from about 0.1 to 10 parts by weight of a salt of the formula: in which R is a C1 to C6 alkyl radical or an aryl radical, unsubstituted or substituted aryl radical and M is an alkali metal selected from Li, Na, or K.