Production of double- or multi-layered microcapsules

A - Human Necessities – 61 – K

Patent

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A61K 9/50 (2006.01)

Patent

CA 2588509

The invention relates to a method for production of double- or multi-layered microcapsules, comprising an inner microcapsule of cross-linked polymers and biological cells and one or more layers of cross-linked polymers without biological cells, which completely enclose(s) the inner microcapsule, whereby, in a first method step, single-layered microcapsules of cross-linked polymers with biological cells are produced and, in at least one further method step, at least one outer layer shell of cross-linked polymer is applied which contains no biological cells.

L'invention concerne un procédé de production de microcaspules à deux ou plusieurs couches, comprenant une microcapsule interne de polymères réticulés et de cellules biologiques et une ou plusieurs couches de polymères réticulés sans cellule biologique, qui enveloppe(nt) complètement la microcapsule interne. Dans une première étape du procédé, des microcapsules à une couche de polymères réticulés avec des cellules biologiques sont produites et, dans au moins une autre étape dudit procédé, au moins une couche d'enveloppe extérieure de polymères réticulés est appliquée, laquelle couche d'enveloppe ne contient pas de cellules biologiques.

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