Brominated biphenol process

Details Brominated biphenol process Brominated biphenol process

1976-05-07

1977-11-15

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260613R, C07C 3700, C07C 4100, C07C 4962

Patent

active

040585700

ABSTRACT:
Brominated biphenols are produced by a bromination process which comprises reacting bromine with a 3,3', 5,5'-tetrasubstituted diphenoquinone at a temperature below about +20.degree. C. in the presence of an inert diluent, evolving hydrogen bromide gas at a temperature of about +20.degree. C. or lower, heating the resulting reaction mixture at elevated temperatures to complete the bromination reaction and recovering the desired 2,2',6,6'-tetrabromo-3,3',5,5'-tetrasubstituted-4,4'-biphenol. The biphenol products of the process can be used as antioxidants, as monomeric starting materials for polymeric halogenated organic compounds which are fire retardant as well as monomeric flame retardant additives for polymeric compositions useful in molding, coating and insulating various articles of manufacture.

REFERENCES:
patent: 3546302 (1970-12-01), Asadonan et al.
patent: 3720721 (1973-03-01), Becker et al.
patent: 3748303 (1973-07-01), Becker et al.
patent: 3894094 (1975-07-01), Rutledge
patent: 3929908 (1975-12-01), Orlando et al.
patent: 3956403 (1976-05-01), Orlando et al.

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