Halogenated bis-imide flame retardants

Details Halogenated bis-imide flame retardants Halogenated bis-imide flame retardants

1988-02-01

1989-10-03

Foelak, Morton

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

524 94, C07D20948

Patent

active

048718637

ABSTRACT:
This invention relates to a process for enhancing the properties of alkylene(C.sub.1 -C.sub.6)-bis-(tetrabromophthalimide) or bis-(tetrabromophthalimide) products produced by the bromination, respectively, of alkylene(C.sub.1 -C.sub.6)-bis-(phthalimide) or bis-(phthalimide) with a brominating agent in the presence of oleum, the process comprising curing the alkylene(C.sub.1 -C.sub.6)bis-(tetrabromophthalimide) or bis-(tetrabromophthalimide) products at a temperature above about 150.degree. C. and below the melting point of the tetrabromophthalimide being cured for a period of from about 36 hours to about 5 hours. This enhanced product and its use in molding and extrusion compositions and in molded and extruded articles is also disclosed.

REFERENCES:
patent: 3868388 (1975-02-01), Dotson et al.
patent: 4125535 (1978-11-01), Wolford

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