| abstract |
(a) aus Gelbildnem, anionischen Polymeren und Wirkstoffen eine Matrix zubereitet, (b) die Matrix in einer Ölphase dispergiert, (c) die dispergierte Matrix mit wäßrigen Chitosanlösungen behandelt und dabei die Ölphase entfernt. Microcapsules with average diameters in the range from 0.1 to 5 mm, consisting of an enveloping membrane and a matrix containing at least one active ingredient, are proposed in that (a) a matrix is prepared from gel-forming, anionic polymers and active ingredients, (b) the matrix is dispersed in an oil phase, (c) treating the dispersed matrix with aqueous chitosan solutions and thereby removing the oil phase. |