Method to produce flame retardant styrenic polymers and product produced thereby
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United States of America Patent
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Dec 25, 2001
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N/A
app pub date -
Nov 15, 1999
filing date -
Nov 15, 1999
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Expired
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Abstract
Disclosed is a process for producing thermally stabilized styrenic polymers and products produced thereby wherein a pre-formed styrenic polymer is functionalized with a bifunctional Friedel-Crafts-type alkylation or acylation agent to yield a functionalized styrenic polymer. The functionalized polymer is admixed with a Friedel-Crafts-type catalyst, preferably a phosphate ester, and optionally a base, such that the functionalized polymer will experience inter- and intramolecular cross-linking reactions at elevated temperatures, thereby stabilizing the polymer from further thermal degradation.
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