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    • 9. 发明授权
    • Nanocomposite comprising exfoliated nanoclay-styrenic concentrate and methods of preparation
    • 包含剥离的纳米粘土 - 苯乙烯浓缩物的纳米复合物和制备方法
    • US07928156B2
    • 2011-04-19
    • US12272136
    • 2008-11-17
    • Albin P. Berzinis
    • Albin P. Berzinis
    • C08K3/34C08F283/08
    • C08J5/005B82Y30/00C08J2325/04C08L21/00
    • A composition is disclosed comprising a styrenic first polymer, nanoclay, and an emulsifier compound, which can be blended with an additional polymer. A nanocomposite exhibits improved heat resistant properties and stiffness. In one embodiment, the additional polymer is poly(phenylene ether). An article and a method for the preparation a nanocomposite are also disclosed. In one embodiment, the process of obtaining a nanocomposite comprises emulsion polymerizing styrenic monomers in the presence of an aqueous dispersion of nanoclay and emulsifier compound, wherein an aqueous mixed dispersion comprising styrenic polymer and nanoclay is formed; coagulating the aqueous mixed dispersion with a coagulating agent to form a coagulated mixed dispersion comprising nanoclay and styrenic polymer; solidifying the coagulated mixed dispersion to form a polymeric clay concentrate comprising the nanoclay and the styrenic polymer as a carrier resin; and mixing the polymeric nanoclay concentrate, directly or indirectly with an additional polymer to form a nanocomposite.
    • 公开了一种组合物,其包含苯乙烯第一聚合物,纳米粘土和乳化剂化合物,其可与另外的聚合物共混。 纳米复合材料具有改善的耐热性能和刚度。 在一个实施方案中,另外的聚合物是聚(苯醚)。 还公开了制备纳米复合材料的制品和方法。 在一个实施方案中,获得纳米复合材料的方法包括在纳米粘土和乳化剂化合物的水分散体存在下乳液聚合苯乙烯单体,其中形成包含苯乙烯聚合物和纳米粘土的水性混合分散体; 用凝结剂凝结含水混合分散体,形成包含纳米粘土和苯乙烯聚合物的凝结混合分散体; 固化凝固的混合分散体以形成包含纳米粘土和苯乙烯聚合物作为载体树脂的聚合物粘土浓缩物; 并将聚合物纳米粘土浓缩物直接或间接地与另外的聚合物混合以形成纳米复合材料。