The present invention relates to a method for preparing smooth-surface
spherical microparticles which are completely or partially made of at
least one water-insoluble linear polysaccharide. This method involves
dissolving the at least one water-insoluble linear polysaccharide in a
solvent or a mixture of solvents, introducing the solution into a
precipitation agent or a mixture of precipitation agents, optionally
cooling the mixture thus obtained, and separating the microparticles thus
formed. The precipitation agent used consists of at least one
water-soluble cellulose derivative. This invention also relates to
microparticles obtained according to this method.
