Process for preparing intrinsically foamed thermoplastic polymer
    3.
    发明授权
    Process for preparing intrinsically foamed thermoplastic polymer 失效
    本发明的热塑性聚合物的制备方法

    公开(公告)号:US5439946A

    公开(公告)日:1995-08-08

    申请号:US108628

    申请日:1993-08-30

    IPC分类号: C08F222/06 C08F20/02 C08J9/02

    CPC分类号: C08J9/02

    摘要: Process and intermediate for preparing an intrinsically foamed thermoplastic polymer comprising a vinyl monomer and maleic acid and/or maleic anhydride, in which process a polymer composition comprising:a) a core polymer based ona.1) 12-50 moles % maleic acid and/or maleic anhydridea.2) a vinyl monomer, anda.3) optionally a third monomer, where the sum total of a1+a2+a3 is 100 moles % and the weight average molecular weight of the core polymer is 50000-500000, andb) optionally a nucleating agent, is introduced into equipment suited for making foam, in which process the core polymer, and optionally the nucleating agent, are brought to a temperature which is high enough to release CO.sub.2 from the core polymer, and in which process the polymer melt is expanded to form a polymer foam with the desired density. The core polymer is preferably a polymer of styrene and maleic anhydride.

    摘要翻译: PCT No.PCT / NL92 / 00040 Sec。 371日期:1993年8月30日 102(e)日期1993年11月1日PCT提交1992年2月27日PCT公布。 公开号WO92 / 15638 日本9月17日,1992。用于制备包含乙烯基单体和马来酸和/或马来酸酐的固有发泡热塑性聚合物的方法和中间体,其中聚合物组合物包含:a)基于a的核聚合物。 -50摩尔%的马来酸和/或马来酸酐a.2)乙烯基单体和a.3)任选的第三单体,其中a1 + a2 + a3的总和为100摩尔%,重均分子量 核心聚合物为50000-500000,并且b)任选的成核剂被引入适于制备泡沫的设备中,其中芯聚合物和任选的成核剂达到足够高的温度释放二氧化碳 并且在该方法中,聚合物熔体被膨胀以形成具有所需密度的聚合物泡沫体。 核心聚合物优选为苯乙烯和马来酸酐的聚合物。

    Process for the manufacturing of a multilayer plastic container
    4.
    发明授权
    Process for the manufacturing of a multilayer plastic container 失效
    制造多层塑料容器的方法

    公开(公告)号:US4857258A

    公开(公告)日:1989-08-15

    申请号:US834358

    申请日:1986-02-28

    摘要: A process for the preparation of a multilayer plastic container in which an inner and an outer layer, one of which is in the melt phase, are introduced into an opened mold. Before the mold is closed, the inner layer is inflated by a pressurized medium until the facing surfaces of the inner and outer layers are in contact over almost all their respective surface areas. The mold is then closed and the first and second layers are forced against the mold wall by a pressurized medium.

    摘要翻译: 一种制备多层塑料容器的方法,其中其中一个处于熔融阶段的内层和外层被引入打开的模具中。 在模具关闭之前,通过加压介质使内层膨胀,直到内层和外层的相对表面几乎在其各自的表面区域上接触。 然后关闭模具,并且通过加压介质将第一层和第二层压在模具壁上。