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A platform for research: civil engineering, architecture and urbanism
POLYSTYRENE-BASED RESIN EXTRUSION FOAM PLATE
To provide a polystyrene-based resin extrusion foam plate having high flame retardancy against a severer condition, in particular, contact of spark.SOLUTION: A polystyrene-based resin extrusion foam plate is obtained by extrusion-foaming a polystyrene-based resin using a physical foaming agent, in which the physical foaming agent contains aliphatic saturated hydrocarbon having 3 to 5 carbon atoms, hydrofluoroolefin and other foaming agents, the total blended amount of the aliphatic saturated hydrocarbon having 3 to 5 carbon atoms and the hydrofluoroolefin is 0.30-1.10 mol with respect to 1 kg of the polystyrene-based resin, a ratio of the blended amount of the aliphatic saturated hydrocarbon having 3 to 5 carbon atoms with respect to 100 mol% of the total of the blended amount of the physical foaming agent is 0.5 mol% or more and less than 10 mol%, and a ratio ((I)/(II)) of the bulk density (I) of the surface layer portion to 5 mm in a thickness direction from the surface of the extrusion foam plate of the surface portion to the bulk density (II) of the whole extrusion foam plate exceeds 1.10.SELECTED DRAWING: None
【課題】より厳しい条件、特に火花の接触に対して高い難燃性を有するポリスチレン系樹脂押出発泡板を提供すること。【解決手段】ポリスチレン系樹脂を、物理発泡剤を用いて押出発泡させてなるポリスチレン系樹脂押出発泡板であって、前記物理発泡剤が、炭素数３〜５の脂肪族飽和炭化水素とハイドロフルオロオレフィンと他の発泡剤とを含み、炭素数３〜５の脂肪族飽和炭化水素及びハイドロフルオロオレフィンの合計配合量がポリスチレン系樹脂１ｋｇに対して０．３０〜１．１０ｍоｌであり、物理発泡剤の配合量の合計１００ｍоｌ％に対する炭素数３〜５の脂肪族飽和炭化水素の配合量の割合が０．５ｍоｌ％以上１０ｍоｌ％未満であり、押出発泡板の表面から厚み方向に５ｍｍまでの表層部分の見掛け密度（Ｉ）と押出発泡板全体の見掛け密度（II）との比（（Ｉ）／（II））が１．１０を超える。【選択図】なし
POLYSTYRENE-BASED RESIN EXTRUSION FOAM PLATE
To provide a polystyrene-based resin extrusion foam plate having high flame retardancy against a severer condition, in particular, contact of spark.SOLUTION: A polystyrene-based resin extrusion foam plate is obtained by extrusion-foaming a polystyrene-based resin using a physical foaming agent, in which the physical foaming agent contains aliphatic saturated hydrocarbon having 3 to 5 carbon atoms, hydrofluoroolefin and other foaming agents, the total blended amount of the aliphatic saturated hydrocarbon having 3 to 5 carbon atoms and the hydrofluoroolefin is 0.30-1.10 mol with respect to 1 kg of the polystyrene-based resin, a ratio of the blended amount of the aliphatic saturated hydrocarbon having 3 to 5 carbon atoms with respect to 100 mol% of the total of the blended amount of the physical foaming agent is 0.5 mol% or more and less than 10 mol%, and a ratio ((I)/(II)) of the bulk density (I) of the surface layer portion to 5 mm in a thickness direction from the surface of the extrusion foam plate of the surface portion to the bulk density (II) of the whole extrusion foam plate exceeds 1.10.SELECTED DRAWING: None
【課題】より厳しい条件、特に火花の接触に対して高い難燃性を有するポリスチレン系樹脂押出発泡板を提供すること。【解決手段】ポリスチレン系樹脂を、物理発泡剤を用いて押出発泡させてなるポリスチレン系樹脂押出発泡板であって、前記物理発泡剤が、炭素数３〜５の脂肪族飽和炭化水素とハイドロフルオロオレフィンと他の発泡剤とを含み、炭素数３〜５の脂肪族飽和炭化水素及びハイドロフルオロオレフィンの合計配合量がポリスチレン系樹脂１ｋｇに対して０．３０〜１．１０ｍоｌであり、物理発泡剤の配合量の合計１００ｍоｌ％に対する炭素数３〜５の脂肪族飽和炭化水素の配合量の割合が０．５ｍоｌ％以上１０ｍоｌ％未満であり、押出発泡板の表面から厚み方向に５ｍｍまでの表層部分の見掛け密度（Ｉ）と押出発泡板全体の見掛け密度（II）との比（（Ｉ）／（II））が１．１０を超える。【選択図】なし
POLYSTYRENE-BASED RESIN EXTRUSION FOAM PLATE
ポリスチレン系樹脂押出発泡板
TAIRA ATSUSHI (author) / ISHIKAWA TATSUYUKI (author) / MORITA KEI (author)
2020-08-20
Patent
Electronic Resource
Japanese
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