(Cyclo)alkylenediammonium-bis-tetrahalophthalates

Details (Cyclo)alkylenediammonium-bis-tetrahalophthalates (Cyclo)alkylenediammonium-bis-tetrahalophthalates

1976-07-30

1978-05-30

Gerstl, Robert

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260326N, 252 81, C07C 6312, C09K 328

Patent

active

040923452

ABSTRACT:
(Cyclo)alkylenediammonium-bis-tetrahalophthalates corresponding to the formula: ##STR1## wherein X is halogen and R is an alkylene or cycloalkylene group containing 2-15 carbon atoms are prepared by hydrolyzing a tetrahalophthalic anhydride to the corresponding tetrahalophthalic acid and then reacting the tetrahalophthalic acid in the resultant reaction mixture with a diaminoalkane or diaminocycloalkane containing 2-15 carbon atoms in a molar ratio of about two molar proportions of the acid per molar proportion of the diamine.
The (cyclo)alkylenediammonium-bis-tetrahalophthalates 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 salts until an acid number of substantially 0 is obtained.

REFERENCES:
patent: 3868388 (1975-02-01), Dotson, Jr.
patent: 3873567 (1975-03-01), Cyba
patent: 3944598 (1976-03-01), Paustian et al.
Meyer et al., "Chem. Absts.", 78,158984(u), '73.
Sprung, "Chem. Absts.", 41,1124(c), 1946.
Lituineko et al., "Chem. Absts.", 58,462(h), 1963.

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