Incorporation of finely divided additives at the surface of...

Details Incorporation of finely divided additives at the surface of... Incorporation of finely divided additives at the surface of...

B - Operations, Transporting

01

J

117/45.2

B01J 13/02 (2006.01) B01J 13/22 (2006.01)

Patent

CA 1179902

ABSTRACT OF THE DISCLOSURE Microcapsules are prepared en masse which contain a substantially water- insoluble core and, incorporated at their surface under a thin film of hy- drophilic polymeric colloid, a substantially water insoluble finely divided additive. In the preparation, a primary microcapsule is made in an aqueous vehicle to surround the water-insoluble core, the finely divided additive is then added under stirring to form a fine dispersion and cationic hydro- philic polymeric colloid solution is added to cause the colloid to envelop the additive and deposit it on the capsule wall under a thin film.

400749

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