| 摘要 |
<p>A process for producing composite particles (e.g., spherical particles) constituted of an organic solid ingredient (A) comprising two or more organic solid substances (resins, etc.) from a dispersion comprising a matrix containing a water-soluble aid ingredient (B) comprising an oligosaccharide (B1) and, dispersed in the matrix, a particulate dispersed phase constituted of the organic solid ingredient (A), by dissolving away the aid ingredient (B). The organic solid substances may differ in affinity for the aid ingredient (B). The particles may have a core/shell structure consisting of a core comprising a first organic solid substance (e.g., hydrophobic resin) and a shell comprising a second organic solid substance (e.g., hydrophilic resin) which is incompatible with the first organic solid substance. The proportion of the organic solid ingredient (A) to the aid ingredient (B), (A)/(B), may be from 55/45 to 1/99 (by weight). By the process, composite particles (e.g., core/shell particles) corresponding to the dispersed phase can be easily produced regardless of affinity between the dispersed phase and the matrix and of the method of polymerization used for producing the constituent resin.</p> |
