Flame Retardant Expandable Polystyrene-based Polymerized Beads, and Preparation Method Thereof
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United States of America Patent
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Feb 7, 2013
filing date -
Aug 13, 2010
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Abstract
A method of making flame retardant expandable polystyrene-based polymerized beads includes: mixing (a) about 70 to about 95 wt % of a styrene monomer, (b) about 1 to about 10 wt % of a char-generating thermoplastic resin, and (c) about 4 to about 29 wt % of inorganic foam particles to prepare a dispersion; and polymerizing the dispersion. The method of the present invention can eliminate further processing steps, can exhibit excellent productivity, and can allow easy control of the size of the beads.
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