Method of manufacturing flame-retardant polymer foam comprising a phosphorous flame retardant and flame-retardant foam produced thereby
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United States of America Patent
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Apr 5, 2011
Grant Date -
Nov 8, 2007
app pub date -
May 2, 2007
filing date -
May 2, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention concerns a method of manufacturing flame-retardant polyethylene or polypropylene foam using a derivative of carboxylic acid of phenylphosphinic acid and the flame-retardant polymer foam made thereby. More specifically, this invention concerns a method of manufacturing highly expanded flame-retardant polymer foam prepared by mixing the above mentioned phosphorous flame retardant in a polymer resin and expanding the mixture with a volatile blowing agent or by applying a solution of an organic phosphorous compound to an already-made highly expanded foam and then drying the highly-expanded polymer foam, and the flame-retardant foam prepared thereby.
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