Halogenated bis-imide flame retardants

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

1989-07-24

1991-09-17

Morgan, Kriellion S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

252401, 548461, 548462, C08K 534, C07D20744

Patent

active

050496018

ABSTRACT:
This invention relates to a process for enhancing the properties of alkylene(C.sub.1 -C.sub.6)-bis-(tetrabromophthalimide) or bis-(tetrabromophthalimide) 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) 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, Jr. et al.
patent: 3966726 (1976-06-01), Toth et al.
patent: 4092345 (1978-05-01), Wolford et al.
patent: 4125535 (1978-11-01), Wolford
patent: 4374220 (1983-02-01), Sonnenberg
patent: 4535170 (1985-08-01), Sonnenberg
patent: 4581396 (1986-04-01), Sonnenberg

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