公开(公告)号：US20090181253A1

公开(公告)日：2009-07-16

申请号：US12327051

申请日：2008-12-03

申请人： Stephen Michalik ,  Kristen VanBuskirk ,  Paul Arch

发明人： Stephen Michalik ,  Kristen VanBuskirk ,  Paul Arch

IPC分类号： B32B5/16

CPC分类号： C08F212/08 ,  C08F220/06 ,  C08F255/02 ,  C08F2220/1825 ,  C08J9/0061 ,  C08J9/18 ,  C08J2325/04 ,  C08J2325/08 ,  C08J2423/00 ,  C08L23/06 ,  C08L25/14 ,  C08L2205/04 ,  Y10T428/2982 ,  C08L2666/04

摘要： A particulate interpenetrating network polymer that is composed of a polyolefin polymer and a vinyl aromatic polymer that includes residues of (meth)acrylic acid, is described. The particulate interpenetrating network polymer is formed by polymerization of a vinyl aromatic monomer composition substantially within the polyolefin polymer. The vinyl aromatic monomer composition includes vinyl aromatic monomer (e.g., styrene) and a comonomer that is composed at least in part of (meth)acrylic acid (e.g., (meth)acrylic acid and optionally butyl(meth)acrylate). The amount of (meth)acrylic acid present within the comonomer (and accordingly the vinyl aromatic polymer) is selected such that a molded article prepared from expanded particulate interpenetrating network polymer, has a volume shrinkage value of less than or equal to 5 percent, when subjected to a temperature of 100° C. for 24 hours. Also described is an expandable particulate interpenetrating network polymer that includes the particulate interpenetrating network polymer of the present invention and an expansion agent (e.g., pentane) impregnated therein.

摘要翻译： 描述了由聚烯烃聚合物和包含（甲基）丙烯酸残基的乙烯基芳族聚合物组成的颗粒状互穿网络聚合物。 颗粒状互穿网络聚合物通过基本上在聚烯烃聚合物内聚合乙烯基芳族单体组合物形成。 乙烯基芳族单体组合物包括乙烯基芳族单体（例如苯乙烯）和至少部分（甲基）丙烯酸（例如，（甲基）丙烯酸和任选的（甲基）丙烯酸丁酯）组成的共聚单体。 选择存在于共聚单体（以及因此的乙烯基芳族聚合物）内的（甲基）丙烯酸的量，使得由膨胀的颗粒状互穿网络聚合物制备的模制品的体积收缩值小于或等于5％，当 经受100℃的温度24小时。 还描述了包括本发明的颗粒互穿网络聚合物和浸渍在其中的膨胀剂（例如戊烷）的可发射颗粒互穿网络聚合物。