(cyclo)alkylene diammonium salts of tetrahalophthalate...

Details (cyclo)alkylene diammonium salts of tetrahalophthalate... (cyclo)alkylene diammonium salts of tetrahalophthalate...

C - Chemistry, Metallurgy

07

C

260/306.1, 260/4

C07C 63/20 (2006.01) C07C 69/76 (2006.01) C07D 209/48 (2006.01)

Patent

CA 1115712

5496 12/8/76 PJH ABSTRACT OF THE DISCLOSURE (Cyclo)alkylenediammonium compounds corresponding to the formula: Image wherein X is halogen, R is an alkylene or cycloalkylene group contain- ing 2-15 carbon atoms, each R' alone is an alkyl, cycloalkyl, or aralkyl group, and R'---R' together represent an alkylene, cyclo- alkylene, or aralkylene group are prepared by esterifying a tetrahalo- phthalic anhydride with a mono- or dihydroxyalkane, -cycloalkane, or -aralkane having a boiling point below 250°C, to form a half-ester and then reacting the half-ester with a stoichiometric amount of a diaminoalkane or diaminocycloalkane containing 2-15 carbon atoms. The (cyclo)alkylenediammonium compounds of the invention are useful as flame retardants for normally flammable organic poly- mers and also have utility as intermediates for the preparation of N, N' -(cyclo)alkylene-bis -tetrahalophthalimides, which are also useful as flame retardants. The imides are prepared simply by heating the diammonium compounds.

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