This invention relates to multiphase structured polymer particles comprising at least two rubber component phases (I) formed by copolymerization of monomer mixtures comprising an acrylate ester and a polyfunctional monomer, a thermoplastic resin component phase (II) formed by copolymerization of a monomer mixture comprising a methacrylate ester and other monomers, and satisfying the following conditions (1)-(5).
(1) The number average molecular weight of the thermoplastic resin component forming the outermost phase is 30,000 or less.
(2) The weight ratio of phase (I)/phase (II) is 30/70-80/20.
(3) Of the adjacent phases (1), a specific relation holds regarding the solubility in water of the monomer mixtures forming the nth and n+1th phases.
(4) A specific relation holds between the refractive index of phase (I) and the refractive index of phase (II).
(5) The average particle size is 150nm or less.
When the multiphase structured polymer particles according to this invention are used alone to form molded products, molded products having excellent transparency and elastic recovery properties can be obtained.
本发明涉及多相结构聚合物颗粒,包括至少两个由
丙烯酸酯和多功能单体组成的单体混合物共聚形成的橡胶组分相(I),一个由
甲基丙烯酸酯和其他单体组成的单体混合物共聚形成的热塑性
树脂组分相(II),并满足以下条件(1)-(5)。
(1) 形成最外层相的热塑性
树脂组分的平均分子量为 30,000 或以下。
(2) 相(I)/相(II)的重量比为 30/70-80/20。
(3) 在相邻相(1)中,形成第 n 和 n+1 相的单体混合物在
水中的溶解度有特定的关系。
(4) 相(I)的折射率与相(II)的折射率之间存在特定关系。
(5) 平均粒径为 150nm 或更小。
当单独使用本发明的多相结构聚合物颗粒来形成模塑产品时,可获得透明度和弹性恢复性能极佳的模塑产品。