Method for microencapsulating of a solid substance

摘要

The present invention provides a method of microencapsulating a solid substance and the microencapsulated composition obtained from said method of: (i) preparing a dispersion phase comprising (a) a solution containing a substance which forms a middle layer and (b) a solid substance that is insoluble or difficult to dissolve in said solution, (ii) obtaining a solid substance which has a layer comprising the substance which forms the middle layer by phase-separating the substance which forms the middle layer from the solution and (iii) reacting a monomer that is polymerizable by condensation in the presence of the solid substance that has a layer comprising the substance which forms the middle layer. The above method can efficiently microencapsulate pharmaceutical active ingredients, pesticidal active ingredients, aroma active ingredients and so on that are solid substances and affords an efficacious microencapsulated composition of solid substances.