A multiple particle (e.g., a spherical particle) comprising an organic solid component (A) containing a plurality of organic solid materials (e.g., polymers) is produced by eluting a water-soluble auxiliary component (B) containing at least an oligosaccharide (B1) from a composition having a disperse system, in which a particulate dispersed phase comprising the organic solid component (A) is dispersed in a matrix comprising the auxiliary component (B). The organic solid materials may be different in affinity relative to the auxiliary component (B) from each other. The particle may have a core-shell structure which comprises a core containing a first organic solid material (e.g., a hydrophobic polymer) and a shell containing a second organic solid material (e.g., a hydrophilic polymer) immiscible with the first organic solid material. The weight ratio of the organic solid component (A) relative to the auxiliary component (B) may be about 55/45 to 1/99. The multiple particle corresponding to the dispersed phase (e.g., a core-shell particle) can be produced by a convenient process independently of affinity between the dispersed phase and the matrix and polymerization manner of the polymer.
通过从具有分散系统的组合物中洗
脱含有至少一种
寡糖(B1)的
水溶性辅助组分(B),制得一种由含有多种有机固体材料(如
聚合物)的有机固体组分(A)组成的多颗粒(如球形颗粒),在该组合物中,由有机固体组分(A)组成的颗粒分散相被分散在由辅助组分(B)组成的基质中。有机固体材料相对于辅助成分(B)的亲和力可能互不相同。颗粒可具有核壳结构,包括含有第一种有机固体材料(如疏
水性
聚合物)的核和含有与第一种有机固体材料不相溶的第二种有机固体材料(如亲
水性
聚合物)的壳。有机固体成分(A)相对于辅助成分(B)的重量比可以约为 55/45 至 1/99。与分散相相对应的多粒子(例如核壳粒子)可以通过方便的工艺生产,与分散相和基质之间的亲和性以及
聚合物的聚合方式无关。