COMPOSITION OF CYCLICAL PHOSPHINE OXIDE, CYCLICAL PHOSPHINE OXIDE AND POLYPHENYLENE ETER RESIN, MODIFIED WITH STYLENE, FLAME RETARDANT

摘要

Cyclic phosphine oxides of the formula: IMAGE wherein P is phosphorus, O is oxygen, A is an alkylene chain of 2 to 12 carbon atoms, Z is a polar group and R represents the carbon atoms in a phosphorus-containing ring formed by alkylating an ethylenically unsaturated cyclic hydrocarbon with phosphine. The cyclic phosphine oxides are useful as flame retardants for styrene modified polyphenylene ether resins.