Dehydrohalogenation of poly (phenylhalo-b-hydroxypropyl ether) to form polyepoxide
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United States of America Patent
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May 22, 2001
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N/A
app pub date -
Sep 29, 1999
filing date -
Feb 7, 1997
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Expired
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Abstract
Process for the preparation of compounds of the formula ##STR1## wherein Hal represents chlorine, bromine or iodine and preferably chlorine, wherein R.sub.a represents hydrogen or a residue comprising one or more additional groups of the formula, ##STR2## from compounds ##STR3## wherein R.sub.2 represents hydrogen or a residue comprising one or more additional groups of the formula ##STR4## by reaction with gaseous hydrogen halide in the presence of a catalytic amount of an organic acid; process for the preparation of epoxy compounds starting from the reaction ##STR5## to produce a compound of formula (III) which is converted to a compound of formula (A) that is dehydrohalogenated to form the epoxy rings of a diepoxy compound.
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