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Title
Verfahren zum Mikroverkapseln von Partikeln
Date Issued
1998
Author(s)
Niehaus, M.
Teipel, U.
Krause, H.
Patent No
1997-19711393
Abstract
Production of microcapsules comprises spraying drops or fine particles of a solution of the coating agent in a supercritical fluid onto <100 mu m particles of the substrate in a fluidised bed. USE - (I) are useful in the production of (especially sustained release) pharmaceuticals and fertilisers, and of catalysts, propellants and explosive materials, e.g. hexogen coated with pentaerythritol tetranitrate (PETN) and trinitrotoluene (TNT). ADVANTAGE - The process avoids aggregation due to the reduced adhesion effect of the supercritical solvent. When CO2 is used as solvent, costas are reduced. The product (especially pharmaceutical or explosive) is free from all traces of the solvent.
Language
de
Patenprio
DE 1997-19711393 A: 19970319