HALOGEN-CONTAINING PHOSPHATE ESTERS AND THEIR USE AS FLAME RETARDANTS FOR POLYURETHANES

摘要

Novel triesters of pentavalent phosphorus acid having the formula: WHEREIN X is chlorine, bromine, or hydrogen, Z1 and Z2 are independently selected from bromine, chlorine, or hydrogen; R1 is methyl, chloromethyl, bromomethyl or hydrogen; and R2 is methyl, chloromethyl or hydrogen, except that R2 is chloromethyl when R1 is bromomethyl, and non-scorching plastic composition containing polyurethanes and said triesters of pentavalent phosphorus acid.