FLAME RETARDANT HALOGENATED ARYL ETHER OLIGOMER COMPOSITIONS AND THEIR PRODUCTION
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United States of America Patent
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Issued Date -
Feb 3, 2011
app pub date -
Jul 31, 2009
filing date -
Jul 31, 2009
priority date (Note) -
Abandoned
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Abstract
In a process for producing a flame retardant halogenated aryl ether oligomer composition, an aryl ether oligomer is combined with a liquid carrier having a boiling point lower than water to form a slurry or solution of the aryl ether oligomer in the carrier. A halogenating agent is included in the slurry or solution to form a reaction composition, which is reacted at a temperature between about 20° C. and about 80° C. to form a reaction product containing the desired halogenated aryl ether oligomer composition. Unreacted halogenating agent is removed from the reaction product and the reaction product is contacted with an aqueous medium at a temperature sufficient to drive off the liquid carrier and produce an aqueous slurry of the halogenated aryl ether oligomer composition. The desired halogenated aryl ether oligomer composition is then recovered from the aqueous slurry.
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