Polystyrene resin foam and process for producing the foam body
    2.
    发明授权
    Polystyrene resin foam and process for producing the foam body 失效
    聚苯乙烯树脂泡沫及其制造方法

    公开(公告)号:US6063823A

    公开(公告)日:2000-05-16

    申请号:US836990

    申请日:1997-08-22

    IPC分类号: C08J9/00 C08J9/14

    摘要: A blowing agent comprising a hydrofluorocarbon having at least one hydrogen atom and containing no chlorine is used to obtain a polystyrene-based resin foam body with a high expansion rate, employing as the base polymer a resinous blend comprising polystyrene and a polymer containing oxygen, nitrogen or fluorine or a resinous blend comprising polystyrene and an oxy acid or its derivative.

    摘要翻译: PCT No.PCT / JP95 / 02363 Sec。 371日期1997年8月22日 102(e)日期1997年8月22日PCT 1995年11月17日PCT PCT。 WO96 / 16111 PCT出版物 日期1996年5月30日使用包含具有至少一个氢原子并且不含氯的氢氟烃的发泡剂来获得具有高膨胀率的聚苯乙烯基树脂发泡体,其使用包含聚苯乙烯和聚合物的树脂共混物作为基础聚合物 含有氧,氮或氟或含有聚苯乙烯和含氧酸或其衍生物的树脂共混物。

    Method of forming thermoplastic foams using cell size enlarging agents
    4.
    发明授权
    Method of forming thermoplastic foams using cell size enlarging agents 失效
    使用细胞尺寸扩大剂形成热塑性泡沫的方法

    公开(公告)号:US5489407A

    公开(公告)日:1996-02-06

    申请号:US278283

    申请日:1994-07-21

    IPC分类号: C08J9/04 C08J9/00 B29C44/20

    CPC分类号: C08J9/0014 Y10S264/13

    摘要: 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.

    摘要翻译: 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。