Foamable styrenic resin particle



PROBLEM TO BE SOLVED: To obtain formable styrenic resin particles which contain an evaporable organic compound in a small amount, has excellent foamability, gives foamed moldings having high strengths, and can form the foamed moldings in a short molding cycle. SOLUTION: The foamable styrenic resin particles comprising styrenic resin particles having a weight-average mol.wt. of 180.000 to 400,000, is characterized by containing an organic compound having a boiling point of ≤90°C as a foaming agent in an amount of 2 to 2.5 pts.wt. per 100 pts.wt. of the styrenic resin particles, and further containing a liquid paraffin having an average carbon number of 20 to 35 carbon atoms as a plasticizer in an amount of 0.5 to 5 pts.wt. per 100 pts.wt. of the styrenic resin particles. COPYRIGHT: (C)2001,JPO
(57)【要約】 【課題】 揮発性有機化合物の含有量が少ないが優れた 発泡性を有しており,更に得られる発泡成形体の強度が 高くかつ短い成形サイクルで発泡成形体を成形可能な発 泡性スチレン系樹脂粒子を提供すること。 【解決手段】 重量平均分子量が18万〜40万のスチ レン系樹脂粒子からなると共に,発泡剤として沸点が9 0℃以下の有機化合物が上記スチレン系樹脂粒子100 重量部に対し2〜5.5重量部含有され,可塑剤として 平均炭素数が20〜35個でかつ常温で液体のパラフィ ン類が上記スチレン系樹脂粒子100重量部に対し0. 5〜5重量部含有されている。




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Cited By (3)

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    JP-2002249614-ASeptember 06, 2002Mitsubishi Kagaku Form Plastic Kk, 三菱化学フォームプラスティック株式会社発泡性スチレン系樹脂粒子
    JP-2003064212-AMarch 05, 2003Kanegafuchi Chem Ind Co Ltd, 鐘淵化学工業株式会社発泡性ポリスチレン系樹脂粒子およびポリスチレン系樹脂発泡成形体
    JP-2007197471-AAugust 09, 2007Jsp Corp, Kurita Water Ind Ltd, 栗田工業株式会社, 株式会社ジェイエスピーManufacturing method of carrier for forming biomembrane and carrier for forming biomembrane