Alcohol-blocked brominated bisphenol a epoxy resin flame retardants for carbonyl-containing thermoplastic resins
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United States of America Patent
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Jan 2, 2001
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N/A
app pub date -
Feb 20, 1998
filing date -
Jul 28, 1997
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Expired
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Abstract
A halogenated flame retardant for a thermoplastic resin with carbonyl linkages in the main chain such as polyethylene terephthalate or polybutylene terephthalate is obtained by the modification of a brominated bisphenol A epoxy resin optionally advanced with brominated bisphenol A by reaction of the epoxy groups with a C.sub.1 -C.sub.8 alcohol such as methanol or butanol to the extent that the ratio of unmodified epoxy groups to alcohol-modified epoxy groups is from 2/1 to 1/2.
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