Salts of diamines and tetrahalophthalates

Details Salts of diamines and tetrahalophthalates Salts of diamines and tetrahalophthalates

1977-01-17

1979-02-20

Myers, Jane S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

260 458N, 260 4585N, 260326N, C07C 6980

Patent

active

041408624

ABSTRACT:
(Cyclo)alkylenediammonium compounds corresponding to the formula: ##STR1## wherein X is halogen, R is an alkylene or cycloalkylene group containing 2-15 carbon atoms, each R' alone is an alkyl, cycloalkyl, or aralkyl group, and R'---R' together represent an alkylene, cycloalkylene, or aralkylene group are prepared by esterifying a tetrahalophthalic anhydride with a mono- or dihydroxyalkane, -cycloalkane, or -aralkane having a boiling point below 250.degree. 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 polymers 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.

REFERENCES:
Matsuda et al., CA 85, 20871t (1976).

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