Abstract: The present invention relates to a method for preparing a polymeric microsphere and the polymeric microsphere prepared by the method, and specifically, relates to a method for preparing a polymeric microsphere in which a single oil-in-water type of emulsion is prepared using specific polymeric compound and organic solvent and then ammonia solution is added to perform ammonolysis and the polymeric microsphere prepared thereby, a composition for bioactive substance delivery comprising the microsphere and a method for preparing thereof. The preparation method of the present invention does not use a halogen organic solvent which is harmful to human body, and does not use a porogen and uses ammonolysis, and in case of preparing a polymeric microsphere according to the preparation method, a microsphere which the preparation process is simple of and is not harmful to human body and has spontaneous pore-closing functionality and extremely strong porosity and pores.

Abstract: The present invention relates to a method for preparing microspheres and microspheres prepared thereby, more particularly to a method for preparing a polymeric microsphere, including preparing an emulsion including a polymer compound, a drug, a water-insoluble organic solvent and a dispersion solvent and adding to the prepared emulsion a base or an acid to remove the water-insoluble organic solvent from the emulsion, a polymeric microsphere prepared thereby, and a composition for drug delivery including the microsphere. According to the present invention, a drug-containing polymer microsphere may be prepared quickly and simply without the solvent evaporation or solvent extraction process, thereby reducing water consumption and minimizing wastewater generation.

Abstract: The present invention relates to a method for producing polymeric microspheres loaded with drugs and polymeric microspheres loaded with drugs produced thereby, specifically a method for producing polymeric microspheres loaded with drugs, the method comprising the steps of a) adding a dispersion phase containing a high molecular compound, a drug, and a water-insoluble organic solvent to a dispersion solvent to produce an O/W (oil-in-water) type or O/O (oil-in-oil) type emulsion, or adding a W/O (water-in-oil) type emulsion, which is prepared by emulsifying an aqueous solution, in which a drug is dissolved, in a water-insoluble organic solvent, in which the high molecular compound is dissolved, to the dispersion solvent to produce a W/O/W (water-in-oil-in-water) type emulsion; and b) adding an ammonia solution to the emulsion produced in step a) to convert the water-insoluble organic solvent into water-soluble solvents, and polymeric microspheres loaded with drugs produced thereby.

Abstract: The present invention relates to a method for preparing microspheres and microspheres prepared thereby, more particularly to a method for preparing a polymeric microsphere, including preparing an emulsion including a polymer compound, a drug, a water-insoluble organic solvent and a dispersion solvent and adding to the prepared emulsion a base or an acid to remove the water-insoluble organic solvent from the emulsion, a polymeric microsphere prepared thereby, and a composition for drug delivery including the microsphere. According to the present invention, a drug-containing polymer microsphere may be prepared quickly and simply without the solvent evaporation or solvent extraction process, thereby reducing water consumption and minimizing wastewater generation.

Abstract: The present invention relates to a method for producing polymeric microspheres loaded with drugs and polymeric microspheres loaded with drugs produced thereby, specifically a method for producing polymeric microspheres loaded with drugs, the method comprising the steps of a) adding a dispersion phase containing a high molecular compound, a drug, and a water-insoluble organic solvent to a dispersion solvent to produce an O/W (oil-in-water) type or 0/0 (oil-in-oil) type emulsion, or adding a W/O (water-in-oil) type emulsion, which is prepared by emulsifying an aqueous solution, in which a drug is dissolved, in a water-insoluble organic solvent, in which the high molecular compound is dissolved, to the dispersion solvent to produce a W/O/W (water-in-oil-in-water) type emulsion; and b) adding an ammonia solution to the emulsion produced in step a) to convert the water-insoluble organic solvent into water-soluble solvents, and polymeric microspheres loaded with drugs produced thereby.