Bis alkyl phosphorus esters of dicarboxylic acids
AssigneeStauffer Chemical Company
InventorsMilton L. Honig, Edward N. Walsh
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Abstract
Bis alkyl phosphorus esters of dicarboxylic acids having the formula ##EQU1## where R' is a C.sub.1 -C.sub.8 alkyl or haloalkyl group, preferably a C.sub.1 -C.sub.4 alkyl or haloalkyl group, and R is a C.sub.1 -C.sub.8 divalent hydrocarbon group are disclosed. The compounds are formed by the reaction of a tertiary phosphite having the formula P(OR').sub.3 with a haloalkyl ester of a dicarboxylic acid having the formula XCH.sub.2 C(O)ORO(O)CCH.sub.2 X, where X is chlorine, bromine or iodine. The compounds have utility as flame retardants and as sequesterants for metallic cation.
Claims11
Compounds having the formula ##EQU3## wherein R' is a C.sub.1 -C.sub.8 alkyl or haloalkyl group and R is selected from the group consisting of an unsubstituted or bromo-substituted C.sub.1 -C.sub.8 alkylene group and an unsubstituted or bromo-substituted C.sub.1 -C.sub.8 hydrocarbon chain group having arylene or ethylenic unsaturation interruption in its chain.
Dependencies are inferred from the claim text.