Mixed ether compositions containing oligomers of polyfunctional phosphine oxides: flame retardants for polymers
AssigneeFMC Corporation
InventorEdward R. Fretz, Jr.
Life of this patent
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Abstract
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.degree. C. to about 200.degree. 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.
Claims73
Mixed ether compositions containing oligomers having the structure:
- ##STR10## wherein R is an organic residue derived from a polyhydric alcohol, said R being a divalent radical selected from the class consisting of a hydrocarbon radical, a halogenated hydrocarbon radical and ##STR11## wherein A.sub.1 and A.sub.2 are radicals selected from the group consisting of hydroxyl, hydrogen, bromine and ##STR12## radicals provided that when A.sub.1 is ##STR13## A.sub.2 is hydroxyl;
- when A.sub.1 is hydroxyl A.sub.2 is hydroxyl;
- when A.sub.1 is hydrogen A.sub.2 is hydrogen;
- and when A.sub.1 is bromine A.sub.2 is bromine, Z is 1, 2 or 3, and X may be the same or a different radical selected from the group consisting of hydrogen and ##STR14## radicals.
Mixed ether compositions containing oligomers having the structure:
- ##STR21## wherein Z is 1, 2 or 3, R is the same or a different radical selected from the group consisting of hydrogen, aliphatic alkoxyaliphatic, cycloaliphatic, aromatic, halogenated aliphatic, halogenated cycloaliphatic and halogenated aromatic radicals and X may be the same or a different radical selected from the group consisting of hydrogen, R, ##STR22## radicals.
A flame retardant resin composition comprising a nylon resin containing from about 5 to about 25 parts per hundred of the mixed ether compositions defined by claim 107.
Mixed ether compositions containing oligomers having the structure:
- ##STR26## wherein R is an organic residue derived from a polyhydric alcohol, said R being a divalent radical selected from the class consisting of a hydrocarbon radical, a halogenated hydrocarbon radical and ##STR27## wherein A.sub.1 and A.sub.2 are radicals selected from the group consisting of hydroxyl, hydrogen, bromine and ##STR28## radicals provided that when A.sub.1 is ##STR29## A.sub.2 is hydroxyl;
- when A.sub.1 is hydroxyl A.sub.2 is hydroxyl;
- when A.sub.1 is hydrogen A.sub.2 is hydrogen;
- and when A.sub.1 is bromine A.sub.2 is bromine, Z is 1, 2 or 3, and Y is a radical selected from the group consisting of aliphatic and cycloaliphatic radicals.
Mixed ether compositions containing oligomers having the structure:
- ##STR35## wherein R is a radical selected from the group consisting of aliphatic and cycloaliphatic radicals and Z is 1, 2 or 3.
Dependencies are inferred from the claim text.