B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
42/15, 117/46.6
B01J 13/02 (2006.01) B01J 13/18 (2006.01) B41M 5/155 (2006.01) B41M 5/165 (2006.01)
Patent
CA 1331436
Abstract The invention relates to a process for producing microcapsules by micro- encapsulating hydrophobic oils, particularly with substances contained therein, in which the hydrophobic oil is mixed, accompanied by vigorous stirring, into an aqueous medium containing a dispersion-stabilizing com- pound, the oil-in-water dispersion obtained is adjusted acid, aminoplastic capsules are formed in the conventional manner and the aqueous fraction of the aqueous medium is removed in the usual way. The aqueous medium contains a water-soluble, cationic compound such that it forms a dispersion-stabilizing compound in interaction with the water-soluble, anionic, sulphonated melamine-formaldehyde precondensate. The micro- capsules obtained according to this process can be obtained economically without agglomerate formation in the form of dry single capsules e.g. by spray drying the aqueous capsule dispersion obtained. The invention also permits the encapsulation of random substances in dissolved and/or finely dispersed form.
586410
Pietsch Gunter
Schrader Karl-Heinz
Fetherstonhaugh & Co.
Papierfabrik August Koehler Ag
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