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    Process for controlling the particle size in the preparation of expandable styrene polymers by suspension polymerization
    1.
    发明授权
    Process for controlling the particle size in the preparation of expandable styrene polymers by suspension polymerization 失效
    通过悬浮聚合制备可膨胀的苯乙烯聚合物来控制颗粒尺寸的方法

    公开(公告)号：US5189069A

    公开(公告)日：1993-02-23

    申请号：US726288

    申请日：1991-07-05

    申请人： Hans-Dieter Speikamp ,  Adolf Kuhnle ,  Jurgen Bretschneider

    发明人： Hans-Dieter Speikamp ,  Adolf Kuhnle ,  Jurgen Bretschneider

    IPC分类号： C08F2/18 ,  C08F2/20 ,  C08F12/08 ,  C08F212/00 ,  C08J9/20

    CPC分类号： C08J9/20 ,  C08F12/08 ,  C08J2325/04

    摘要： Expandable styrene polymer of controlled particle size is prepared by polymerizing styrene and optionally polymerizable comonomers in a stirred aqueous suspension in the presence of monomer-soluble free radical initiator and dispersant to the extent that at least 70%, based on the total monomer, of the monomers are polymerized in the aqueous suspension initially to a conversion of at least 70% by weight; and then adding the remaining monomer, initiator and optional copolymerizable monomer and additives to the polymerization medium over one to three hours.

    摘要翻译： 在可溶于单体的自由基引发剂和分散剂的存在下，在搅拌的水悬浮液中聚合苯乙烯和任选的可聚合的共聚单体，制备可控制的粒度的可发射苯乙烯聚合物，至少基于总单体为70％ 单体在水悬浮液中首先聚合至至少70重量％的转化率; 然后将剩余的单体，引发剂和任选的可共聚单体和添加剂在1-3小时内加入到聚合介质中。