PROCESS FOR PREPARING MICROCAPSULES HAVING AN IMPROVED MECHANICAL RESISTANCE

摘要

A process for preparing microcapsules having an improved mechanical resistance, more specifically monodisperse microcapsules consisting of an organic liquid core surrounded by a hydrogel polymer membrane comprises: a) using selected hydrophobic organic liquid material as core constituent; b) using selected acrylamide and/or acrylamide derivatives together with alginate as constituents of the monomer mixture leading to the surrounding polymer membrane; c) initiating and then performing polymerization of the selected monomers up to the desired cross-linkage level of the polymer membrane; and d) subjecting the core and the membrane components to a suitable microcapsulation technology, whereby the microcapsules thus achieved have an improved mechanical resistance. Such microcapsules are useful e.g. as vectors for active compounds or as extraction means.