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Verfahren zur Herstellung von Mikrokapseln

Production of microcapsules with liquid or solid contents, e.g. perfume, ink or adhesives, involves forming the capsule walls from polyurea-containing material with crosslinked functional groups.
 
: Schmidt, F.G.; Pawlik, A.; Rafler, G.; Lang, J.; Friedrich, R.

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Frontpage ()

DE 2001-10156672 A: 20011117
DE 2001-10156672 A: 20011117
WO 2002-EP11736 A: 20021019
DE 10156672 A1: 20030528
B01J0013
C08G0018
German
Patent, Electronic Publication
Fraunhofer IAP ()

Abstract
Die Erfindung betrifft ein Dispergierverfahren zur Herstellung von polyharnstoffbasierten Mikrokapseln mit fluessigem, suspensionshaltigem oder festem Kapselkern. Zur Verkapselung wird ein Isocyanat/Amin-System eingesetzt, das aus der waessrigen Phase heraus die Mikrokapselwand bildet. Zur morphologischen Modifizierung der Kapselwand werden zusaetzlich vernetzende Komponenten genutzt.

 

WO2003042274 A UPAB: 20030723 NOVELTY - A method for the production of polyurea-based microcapsules with liquid and/or solid contents, in which the capsule walls are produced from polyurea-containing material containing functional groups crosslinked with a crosslinker. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) microcapsules with reinforced walls obtained by this method; and (2) microcapsules with walls of polyurea-containing material hardened with a crosslinker. USE - As receptacles for content materials, as receptacles which release the contents under pressure, as micro-storage devices, as components in electronic displays or as micro-reactors (claimed). Contents include perfumes, ink, adhesives and magnetic or dielectric materials. ADVANTAGE - Enables the production of microcapsules with a high level of wall stability and inertness towards a wide range of content materials (water-insoluble or -immiscible solids, liquids and suspensions etc.) combined with very low permeability for organic solvents.

: http://publica.fraunhofer.de/documents/N-44704.html