MIXED ETHER COMPOSITIONS CONTAINING OLIGOMERS OF POLYFUNCTIONAL PHOSPHINE OXIDES AND METHOD FOR THEIR MANUFACTURE

摘要

Mixed ether compositions containing oligomers of polyhydroxyalkyl phosphine oxide are prepared by heating a polyhydroxyalkyl phosphine oxide in the presence of an acid catalyst at temperatures within the range of from about 139 DEG C. to about 200 DEG C. and removing water from the reaction mixture. When the reaction is conducted in the presence of an aliphatic, cycloaliphatic or aromatic alcohol having one or more hydroxyl groups mixed phosphine oxide ethers of the added alcohol are formed. The mixed ether compositions of the present invention are useful fire retardant additives.