Method of manufacturing flame-retardant polymer foam...

Details Method of manufacturing flame-retardant polymer foam... Method of manufacturing flame-retardant polymer foam...

2011-04-05

2011-04-05

Jagannathan, Vasu (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S053000, C521S055000, C521S073000, C521S079000, C521S085000, C521S107000, C521S106000, C524S133000, C524S135000

Reexamination Certificate

active

07919541

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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