Preparation of high fine particle suspension comprises dissolving solid in a solvent, freezing, lyophilizing solid matrix, withdrawing solid matrix from solvent and dispersing in an external phase and applying high power on the dispersion

摘要

Safe preparation of highly fine particle suspension comprises dissolving a solid in a solvent, freezing the solution, lyophilizing the solid matrix in a solvent, withdrawing the solid matrix from the solvent by lyophilization and/or directly extracting the solid matrix in frozen condition, dispersing the solid matrix in an external phase and applying average or high power on the dispersion to form particle suspension; whose average particle size measured with photon-correlation-spectroscopy (PCS) is below 1000 (preferably below 100) nm. ACTIVITY : Pesticide. MECHANISM OF ACTION : None given.