MODIFIED POLYSTYRENE RESIN PARTICLES AND MANUFACTURING METHOD THEREFOR, EXPANDABLE PARTICLES AND MANUFACTURING METHOD THEREFOR, PRE-EXPANDED PARTICLES, AND EXPANDED MOLDED ARTICLE
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United States of America Patent
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Feb 25, 2016
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Mar 25, 2014
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Mar 27, 2013
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Abstract
Modified polystyrene cross-linked resin particles in which polyacrylic acid ester-based resin fine particles having an average particle diameter in the range of 30 to 1,000 nm are dispersed in polystyrene-based resin particles, wherein the content of gel component fraction insoluble to toluene when about 1 g of the modified polystyrene-based cross-linked resin particles is dissolved in 50 ml of toluene at 25° C. is in the range of from 5 to 25% and the gel component shows a degree of swelling in the range of from 10 to 20 in toluene at 25° C.
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