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    • 3. 发明申请
    • MACHINABLE THERMALLY INSULATING POLYMERIC FOAM
    • 可机械绝热绝热泡沫
    • WO2011084277A2
    • 2011-07-14
    • PCT/US2010058630
    • 2010-12-02
    • DOW GLOBAL TECHNOLOGIES LLCFOX RICHARDFRANKOWSKI DAVIDSMITH ROYLEE SIMON
    • FOX RICHARDFRANKOWSKI DAVIDSMITH ROYLEE SIMON
    • C08J9/14
    • C08J9/146C08J9/149C08J2201/03C08J2203/14C08J2203/142C08J2325/12
    • Provide a foamable polymer composition containing: (i) a thermoplastic polymer matrix and a blowing agent, (a) the thermoplastic polymer matrix containing a styrene-acrylonitrile copolymer having a weight-averaged molecular weight in a range of 90,000 to 150,000 and polymerized acrylonitrile concentration in a range of five to twenty weight-percent relative to total polymer matrix weight; and (ii) a blowing agent containing water, 1,1,1,2-tetrafluouroethane and at least one of difluoromethane and 1,1-difluoroethane; (b) cooling the foamable polymer composition to a foaming temperature; and (c) extruding the foamable polymer composition and allowing the blowing agent to expand the foamable polymer composition into a polymeric foam having an average vertical cell size in a range of 0.5 millimeters to 1.8 millimeters and a density in a range of 24 to 40 kilograms per cubic meter and a Normalized Roughness Quotient of 3.5 or less in a Milled Surface Test.
    • 提供一种可发泡聚合物组合物,其包含:(i)热塑性聚合物基质和发泡剂,(a)含有重均分子量在90,000至150,000范围内的苯乙烯 - 丙烯腈共聚物的热塑性聚合物基质和聚合丙烯腈浓度 相对于总聚合物基体重量为5至20重量%的范围; 和(ii)含有水,1,1,1,2-四氟乙烷和二氟甲烷和1,1-二氟乙烷中的至少一种的发泡剂; (b)将可发泡聚合物组合物冷却至发泡温度; 和(c)挤出可发泡聚合物组合物并允许发泡剂将可发泡聚合物组合物膨胀成具有0.5毫米至1.8毫米范围内的平均垂直孔尺寸和24至40千克范围内的密度的聚合物泡沫体 每立方米,在铣削表面试验中的归一化粗糙度为3.5以下。