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23 条记录 (耗时 0.016 秒)

    Expandable polystyrene resin beads, process for the preparation of them, and foam made by using the same
    21.
    发明授权
    Expandable polystyrene resin beads, process for the preparation of them, and foam made by using the same 失效
    可发性聚苯乙烯树脂珠，其制备方法和使用它们制成的泡沫

    公开(公告)号：US06221926B1

    公开(公告)日：2001-04-24

    申请号：US09319966

    申请日：1999-06-14

    申请人： Hidekazu Oohara ,  Hidehiro Yamaguchi ,  Kyoichi Nakamura

    发明人： Hidekazu Oohara ,  Hidehiro Yamaguchi ,  Kyoichi Nakamura

    IPC分类号： C08J918

    CPC分类号： C08J9/18 ,  B29B9/10 ,  C08J2203/14 ,  C08J2325/04 ,  C08J2351/00

    摘要： Foamable modified polystyrene resin particles (E) comprising a particle of a modified polystyrene resin (C) containing a blowing agent (D), wherein the modified polystyrene resin (C) comprises conjugated diene polymer rubber particles (B) dispersed uniformly throughout a polystyrene resin (A) and when the foamable modified polystyrene resin particle (E) is expanded, there is substantially no deformation of the rubber particles (B) before and after the expansion. A foamed article of a modified polystyrene resin which has a cell membrane of the modified polystyrene resin comprising a polystyrene resin and conjugated diene polymer rubber particles dispersed uniformly throughout the polystyrene resin and has a fusion rate of not less than 50%, wherein the rubber particles maintain substantially spherical form in the cell membrane. According to the present invention, the foamed article of the modified polystyrene resin having break resistance and fusion rate which are equal to those of a high impact polystyrene foamed article can be provided at low cost.

    摘要翻译： 包含发泡剂（D）的改性聚苯乙烯树脂（C）的颗粒的可发泡改性聚苯乙烯树脂颗粒（E），其中改性聚苯乙烯树脂（C）包括均匀分散在聚苯乙烯树脂中的共轭二烯聚合物橡胶颗粒（B） （A），发泡性改性聚苯乙烯树脂粒子（E）膨胀时，膨胀前后橡胶粒子（B）基本上不变形。 改性聚苯乙烯树脂的泡沫制品，其具有改性聚苯乙烯树脂的细胞膜，其包含均匀分散在聚苯乙烯树脂中的聚苯乙烯树脂和共轭二烯聚合物橡胶颗粒，并且具有不低于50％的熔融率，其中橡胶颗粒 在细胞膜中保持基本上球形。 根据本发明，可以以低成本提供具有抗冲击性聚苯乙烯发泡体的耐破坏性和熔融率等同的改性聚苯乙烯树脂的发泡体。

    Process for pre-expanding thermoplastic resin particles
    22.
    发明授权
    Process for pre-expanding thermoplastic resin particles 失效
    预膨胀热塑性树脂颗粒的方法

    公开(公告)号：US4810440A

    公开(公告)日：1989-03-07

    申请号：US66363

    申请日：1987-06-25

    申请人： Hiroyuki Yoshida ,  Kyoichi Nakamura

    发明人： Hiroyuki Yoshida ,  Kyoichi Nakamura

    IPC分类号： B29B11/14 ,  B29C44/34 ,  B29K105/04 ,  C08J9/16 ,  C08J9/22

    CPC分类号： B29C44/3461 ,  B29K2023/00 ,  Y10S264/05 ,  Y10S264/09 ,  Y10S264/13

    摘要： In a process for pre-expanding thermoplastic resin particles which comprises releasing into a low pressure zone a mixture of water and thermoplastic resin particles containing a volatile blowing agent, the mixture being maintained at an elevated temperature under pressure in a pressure vessel, the improvement which comprises releasing the mixture through a plurality of orifice plates in series in the direction of release of the mixture. According to the process of the present invention, the average cell diameter of the obtained pre-expanded particles is larger than that of the pre-expanded particles obtained by means of conventional methods. Therefore, the molded articles prepared from the pre-expanded particles according to the present invention are small in shrinkage and excellent in surface appearance, and are utilizable for use as shock absorbing, wrapping materials or structural materials such as impact-absorbing materials for cars (for example, a car bumper), which require excellent dimensional precision and heat insulating building materials.

    摘要翻译： 在预膨胀热塑性树脂颗粒的方法中，其包括将包含挥发性发泡剂的水和热塑性树脂颗粒的混合物释放到低压区域中，将该混合物在压力容器中在高压下保持在升高的温度， 包括通过多个孔板在混合物的释放方向上串联释放混合物。 根据本发明的方法，所获得的预发泡颗粒的平均泡孔直径大于通过常规方法获得的预发泡颗粒的平均泡孔直径。 因此，根据本发明的由预发泡颗粒制备的模塑制品的收缩率小，表面外观优异，并且可用作减震，包装材料或用于汽车的冲击吸收材料的结构材料 例如汽车保险杠），其需要优异的尺寸精度和隔热建筑材料。