METHOD FOR REMOVING FLAME RETARDANT FROM FOAMED POLYSTYRENE

PROBLEM TO BE SOLVED: To provide a method for effectively removing a flame retardant comprising HBCD (hexabromocyclododecane) added into a molded material of foamed polystyrene particularly used as a building material.SOLUTION: A method for removing a flame retardant includes preparing a solvent mix...

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Hauptverfasser:	HIYOSHI KATSUNORI, UNO HIDETOSHI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MAKING GRANULES OR PREFORMS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for effectively removing a flame retardant comprising HBCD (hexabromocyclododecane) added into a molded material of foamed polystyrene particularly used as a building material.SOLUTION: A method for removing a flame retardant includes preparing a solvent mixture of a first solvent which does not dissolve polystyrene but dissolves HBCD and a second solvent dissolving polystyrene, impregnating the solvent mixture with foamed polystyrene, and after that, repeating one or plural times the operation which agitates and crushes a block of foamed polystyrene to remove the flame retardant. Thereby, high-safety polystyrene is obtained. 【課題】本願発明は、とくに建築用資材として用いられる発泡ポリスチレンの成形物中に添加されたＨＢＣＤ（ヘキサブロモシクロドデカン）から成る難燃剤を効果的に除去するための除去方法を提供する。【解決手段】本願発明は、ポリスチレンを溶解せずＨＢＣＤを溶解する第１の溶剤とポリスチレンを溶解する第２の溶剤の混合溶剤を用意し、この混合溶剤中に発泡ポリスチレンを含浸させ、その後に発泡ポリスチレンのブロックを攪拌破砕して難燃剤を除去する操作を一回または複数回繰返すことによって、ポリスチレンから難燃剤を除去するようにしたものであって、安全性の高いポリスチレンにするものである。【選択図】図１