Thermally expanding microcapsules
    197.
    发明授权
    Thermally expanding microcapsules 有权
    热膨胀微胶囊

    公开(公告)号:US09493625B2

    公开(公告)日:2016-11-15

    申请号:US14764755

    申请日:2014-09-22

    Abstract: The present invention provides a thermally expandable microcapsule that has a high expansion ratio and durability at high temperatures, and is not likely to cause discoloration and odor when used for foam molding. The thermally expandable microcapsule of the present invention includes: a shell formed from a polymer; and a volatile expansion agent as a core agent encapsulated by the shell, the shell obtained by polymerizing a monomer composition that contains a nitrile monomer and a compound having a glycidyl group in a molecule, the shell exhibiting a value y of 50% or higher and a ratio y/x of 1.1 or higher, in which x represents a gel fraction at ordinary temperature, and y represents a gel fraction upon heating at 180° C. for 30 minutes.

    Abstract translation: 本发明提供一种在高温下具有高膨胀率和耐久性的热膨胀性微胶囊,并且当用于发泡成型时不易引起变色和气味。 本发明的热膨胀性微胶囊包括:由聚合物形成的壳; 以及由外壳包封的作为核心试剂的挥发性膨胀剂,通过聚合含有腈单体的单体组合物和分子中具有缩水甘油基的化合物而获得的壳,所述壳的y值为50%以上, 比例y / x为1.1以上,其中x表示常温下的凝胶分数,y表示在180℃加热30分钟时的凝胶分数。

    Nanoporous polymeric foam having high cell density without nanofiller
    200.
    发明授权
    Nanoporous polymeric foam having high cell density without nanofiller 有权
    具有高电池密度的纳米聚合物泡沫,无纳米填料

    公开(公告)号:US09187611B2

    公开(公告)日:2015-11-17

    申请号:US13578092

    申请日:2011-02-23

    Abstract: A polymeric foam has a thermoplastic polymer matrix defining multiple cells, the foam characterized by: (a) the polymer matrix having greater than 50 weight-percent copolymer containing at least two different monomers at least one of which is a methacrylate monomer, each monomer having a solubility parameter lower than 20 (megaPascals)0.5 and a chemical composition where twice the mass fraction of oxygen plus the mass fraction of nitrogen, fluorine and silicon is greater than 0.2; wherein the monomers comprise at least 90 weight-percent of all monomers in the copolymer; (b) at least one of the following: (i) a nucleation site density of at least 3×1014 effective nucleation sites per cubic centimeter of foamable polymer composition; (ii) an average cell size of 300 nanometer or less; (c) a porosity percentage greater than 30%; (d) an absence of nano-sized nucleating additive; and (e) a thickness of at least one millimeter.

    Abstract translation: 聚合物泡沫具有限定多个细胞的热塑性聚合物基质,泡沫的特征在于:(a)聚合物基质具有大于50重量%的共聚物,其含有至少两个不同的单体,其中至少一个是甲基丙烯酸酯单体,每个单体具有 溶解度参数低于20(兆帕)和化学组成,其中氧质量分数加上氮,氟和硅质量分数的两倍大于0.2; 其中所述单体包含所述共聚物中所有单体的至少90重量% (b)以下至少之一:(i)成核位点密度为每立方厘米可发泡聚合物组合物至少3×1014个有效成核位点; (ii)平均泡孔尺寸为300纳米以下; (c)孔隙率大于30%; (d)不存在纳米尺寸的成核添加剂; 和(e)至少一毫米的厚度。

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