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.
An alkylene- or cycloalkylenediammonium-bis-tetrahalophthalate corresponding to the formula: ##STR5## wherein X is halogen and R is an alkylene or cycloalkylene group containing 2-15 carbon atoms.
Claim 2
Dependent Claim
25 words
An alkylene- or cycloalkylenediammonium-bis-tetrahalophthalate corresponding to the formula: ##STR5## wherein X is halogen and R is an alkylene or cycloalkylene group containing 2-15 carbon atoms.
Claim 3
Dependent Claim
9 words
The bis-tetrahalophthalate of claim 1 wherein X is bromine.
Claim 4
Dependent Claim
9 words
The bis-tetrahalophthalate of claim 1 wherein X is chlorine.
Claim 5
Dependent Claim
11 words
The bis-tetrahalophthalate of claim 1 wherein R is a 1,2-ethylene group.
Claim 6
Dependent Claim
11 words
The bis-tetrahalophthalate of claim 1 wherein R is a 1,2-propylene group.
Claim 7
Dependent Claim
11 words
The bis-tetrahalophthalate of claim 1 wherein R is a 1,3-propylene group.
Claim 8
Dependent Claim
11 words
The bis-tetrahalophthalate of claim 1 wherein R is a 1,6-hexamethylene group.
Claim 9
Dependent Claim
15 words
The bis-tetrahalophthalate of claim 1 wherein R is a 1,2-ethylene group and X is bromine.