Hollow polymer microcapsules and method of producing the same

摘要: Hollow polymer microcapsules are made by the method of dissolving a film-forming in volatile nonaqueous solvent; dispersing into solution finely divided particles volatilizable solid core material; inducing formation coating on particulate material liquid mixture to produce having an encapsulated recovering from mixture; and removing make hollow microcapsules. Gas-filled that according this invention useful medical applications such as imaging contrast agents because they may be prepared precisely controlled size specifications.