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    Process for the preparation of prefoamed polyolefin particles
    1.
    发明授权
    Process for the preparation of prefoamed polyolefin particles 失效
    预发泡聚烯烃颗粒的制备方法

    公开(公告)号：US5380766A

    公开(公告)日：1995-01-10

    申请号：US246166

    申请日：1994-05-19

    申请人： Michael Trager ,  Thomas Leven

    发明人： Michael Trager ,  Thomas Leven

    IPC分类号： C08J9/18

    CPC分类号： C08J9/18 ,  C08J2203/14 ,  C08J2323/02

    摘要： Foamed polyolefin particles are prepared by dispersion foaming of components consisting essentially of polyolefin particles, a liquid dispersing agent and optionally a volatile blowing agent in a reaction system consisting essentially of a reactor equipped with a stirrer containing said components and a discharge jet, comprising the step of:gassing the components of the reactor by injecting an inert gas into the dispersion below the surface of the liquid in the reactor;and simultaneouslydischarging a three phase mixture of liquid dispersing agent, polymer particles and gas through said jet.

    摘要翻译： 发泡聚烯烃颗粒通过基本上由在反应体系中组成的基本上由聚烯烃颗粒，液体分散剂和任选的挥发性发泡剂组成的组分的分散发泡来制备，所述反应体系基本上由装备有包含所述组分的搅拌器的反应器和排出喷嘴组成， 通过将惰性气体注入到反应器液体表面下方的分散体中来吹送反应器的组分; 同时通过所述射流同时排出液相分散剂，聚合物颗粒和气体的三相混合物。

    Method of manufacturing foam beads
    2.
    发明授权
    Method of manufacturing foam beads 失效
    泡沫珠的制造方法

    公开(公告)号：US5480599A

    公开(公告)日：1996-01-02

    申请号：US289546

    申请日：1994-08-12

    申请人： Thomas Leven ,  Michael Trager ,  Horst Perl

    发明人： Thomas Leven ,  Michael Trager ,  Horst Perl

    IPC分类号： B29B9/16 ,  B29C44/00 ,  B29C44/34 ,  B29K23/00 ,  B29K105/04 ,  C08J9/18 ,  C08J9/228

    CPC分类号： B29C44/3461

    摘要： A continuous process for manufacturing foam beads using a simple apparatus, wherein the expansion agent can be easily recycled. Polymer particles and a dispersing medium are fed continuously to an unstirred mass transfer column having a high length to diameter ratio which is operated under pressure. The polymer particles and dispersing medium are subjected to thermal processing under pressure in the mass transfer column, and the resulting dispersion is sprayed into a low pressure space causing the polymer particles to expand. Accordingly, foam beads of constant quality and a uniform cell diameter and a uniform degree of expansion are manufactured without costly process means.

    摘要翻译： 使用简单的装置制造泡沫珠的连续方法，其中膨胀剂可以容易地再循环。 将聚合物颗粒和分散介质连续供给到在加压下操作的具有高长径比的未搅拌的传质柱。 聚合物颗粒和分散介质在传质柱中在压力下进行热处理，将所得分散体喷射到低压空间中，使聚合物颗粒膨胀。 因此，在没有昂贵的处理手段的情况下，制造质量恒定，泡孔直径均匀，均匀膨胀程度的泡沫珠。

    Process for the production of foam beads
    3.
    发明授权
    Process for the production of foam beads 失效
    生产泡沫珠的工艺

    公开(公告)号：US5550170A

    公开(公告)日：1996-08-27

    申请号：US309438

    申请日：1994-09-20

    申请人： Michael Trager ,  Reinhard Wirobski ,  Thomas Leven

    发明人： Michael Trager ,  Reinhard Wirobski ,  Thomas Leven

    IPC分类号： C08J9/16 ,  C08J9/18

    CPC分类号： C08J9/18 ,  C08J2203/14 ,  C08J2323/16

    摘要： The production of approximately spherical polyolefin foam particles having a coarse cell structure and a narrow cell size distribution by dispersion foaming is achieved by a process in which the reactor contents, which essentially comprise polyolefin particles, a liquid dispersion medium and, if desired, a volatile blowing agent, are first treated at a first temperature above the crystallite melting point T.sub.m of the polyolefin, and subsequently passed through a cooling device, in which the dispersion is brought to a second, lower temperature, and the polymer particles are then foamed at this temperature. The foamed particles can be converted into moldings by known methods.

    摘要翻译： 生产具有粗细胞结构和通过分散发泡的细胞尺寸分布窄的近似球形聚烯烃泡沫颗粒通过以下方法实现：其中基本上包含聚烯烃颗粒的反应器内容物，液体分散介质和如果需要的话，挥发物 首先在高于聚烯烃的微晶熔点Tm的第一温度下处理发泡剂，然后通过冷却装置，其中分散体达到第二较低温度，然后在该温度下将聚合物颗粒发泡 温度。 发泡颗粒可以通过已知的方法转化成模制品。