Patent ID: 6228291
Filing Date: 2001-05-08
Classification: B01J,Y10S,Y10T

Abstract:
A process for preparing a controlled-release chitosan microcapsule, comprising:(a) preparing an emulsion 1 by inserting an aqueous polymer solution containing from 0.3 to 10 weight percent chitosan and from 0.1 to 2 weight percent of acetic acid in an emulsion;(b) preparing an emulsion 2 by inserting an aqueous crosslinking agent solution containing from 0.5 to 10 volume percent of sulfuric acid and from 1 to 50 volume percent of aqueous 25 percent glutaraldehyde solution in an emulsion; and(c) mixing said emulsion 1 and said emulsion 2 1:1 to form a microcapsule by the emulsion interfacial reaction between the chitosan polymer and the crosslinking agent.