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    • 4. 发明授权
    • Method of forming thermoplastic foams using cell size enlarging agents
    • 使用细胞尺寸扩大剂形成热塑性泡沫的方法
    • US5489407A
    • 1996-02-06
    • US278283
    • 1994-07-21
    • Kyung W. SuhMasayuki WakabayashiChau V. VoAndrew N. Paquet
    • Kyung W. SuhMasayuki WakabayashiChau V. VoAndrew N. Paquet
    • C08J9/04C08J9/00B29C44/20
    • C08J9/0014Y10S264/13
    • A process for making a closed-cell, alkenyl aromatic polymer foam structure having enlarged cell size. An alkenyl aromatic polymer material is heated to form a melt polymer material. An amount of a non-waxy cell size enlarging agent is incorporated into the melt polymer material. The enlarging agent is present in an amount sufficient to enlarge the stabilized cell size of the formed foam structure by 20 percent or more over a corresponding foam structure made without the enlarging agent. Further, the enlarging agent is incorporated in a quantity such that the formed foam structure has physical properties substantially the same degree as the corresponding foam structure. A blowing agent is incorporated into the melt polymer material at an elevated pressure to form a foamable gel. The foamable gel is expanded in a zone of lower pressure to form the foam structure. Further, disclosed is a foam structure corresponding to the above.
    • 一种制备具有增大的孔尺寸的闭孔,链烯基芳族聚合物泡沫结构的方法。 将烯基芳族聚合物材料加热以形成熔融聚合物材料。 将一定量的非蜡状细胞尺寸扩大剂掺入熔融聚合物材料中。 增容剂的存在量足以使所形成的泡沫结构体的稳定的细胞尺寸在不含放大剂的相应的泡沫结构上扩大20%或更多。 此外,扩大剂的掺入量使得所形成的泡沫结构的物理性质与相应的泡沫结构基本相同。 将发泡剂在升高的压力下加入到熔融聚合物材料中以形成可发泡凝胶。 可发泡凝胶在较低压力的区域内膨胀以形成泡沫结构。 此外,公开了对应于上述的泡沫结构。