A heat-expandable microcapsule comprising a polymer shell formed by polymerizing (I) acrylonitrile, a main monomer component, (II) a monomer having carboxyl and (III) a monomer having groups reactive with the carboxyl of the monomer (II) and of a liquid having a boiling point lower than the softening point of the polymer and being encapsulated in the polymer shell. The heat-expandable microcapsules expand within high temperature range, 240 °C or above, and have heat-resistance.
一种可热膨胀的微胶囊,由聚合物外壳组成,聚合物外壳由以下单体聚合而成:(I) 主单体成分
丙烯腈;(II) 具有羧基的单体;(III) 具有与单体(II)的羧基反应基团的单体;以及沸点低于聚合物软化点的液体,并封装在聚合物外壳中。可热膨胀的微胶囊可在 240 ℃ 或以上的高温范围内膨胀,并具有耐热性。