Great Lakes Chemical Corporation

Bhabatosh Bhattacharya

Rastko I Mamuzic

Nicolai A Favstritsky

Richard S Rose

John E Hill

Wayne C Muench

A method of making flame retarded polyurethanes by including a bromobenzoate compound in the polyurethane mixture. Also disclosed is a method of making flame retarded polyvinyl chlorides, unsaturated polyesters and epoxy resins by incorporating a bromobenzoate compound into the polymer system. The bromobenzoate compounds of the invention may also be used as plasticizers for PVC and rubber.

Use of ring-brominated benzoate compounds as flame retardants and/or

A method of preparing tetrabromobenzoate compounds from tetrabromophthalic anhydride by reacting tetrabromophthalic anhydride with alcohol in the presence of a decarboxylation catalyst. The reaction may be carried out in an excess of alcohol, or with a near stoichiometric amount of alcohol by performing the reaction in an inert solvent.

One-pot synthesis of ring-brominated benzoate compounds

This invention relates to a process for isolation of partially brominated diphenyl ether mixtures ('Octabrom') having an average bromine content of 7.2-8.5. The process comprises: (i) adding a C.sub.1 -C.sub.4 alkanol to the Octabrom in solution in an organic solvent; (ii) maintaining the contact of the alkanol with Octabrom in the organic solvent for that period of time which is sufficient to allow the Octabrom to precipitate in crystalline form, making a slurry; and (iii) recovering the final Octabrom from the slurry.

Isolation of partially brominated diphenyl ether mixtures in crystalline

4,4'-dibromodiphenyl ether may be obtained in high yield and purity by the uncatalyzed 'neat' bromination of diphenyl oxide, followed by methanol digestion.

Process for producing 4,4'-dibromodiphenyl ether

Bis(2-ethyl-1-hexyl) tetrabromophthalate produced by the reaction of tetrabromophthalic anhydride with 2-ethyl-1-hexanol in the presence of titanium isopropoxide catalyst may be purified by contacting the reaction mixture with sodium carbonate decahydrate with agitation for a time and at a temperature sufficient to enhance product quality, followed by isolation of bis(2-ethyl-1-hexyl) tetrabromophthalate.

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Lafayette, IN, United States of America

Bhabatosh Bhattacharya