Microcapsules prepared by coacervation

Details Microcapsules prepared by coacervation Microcapsules prepared by coacervation

B - Operations, Transporting

01

J

117/45.2, 167/4.

B01J 13/02 (2006.01) A01N 25/28 (2006.01) B01J 13/10 (2006.01)

Patent

CA 1251099

MICROCAPSULES PREPARED BY COACERVATION ABSTRACT There is disclosed an improved complex coacervation process for microencapsulation of core ingredients that are partially soluble in the microcap- sule walls wherein the core ingredient is first mixed with a coacervation adjuvant prior to forming a first colloidal emulsion of core ingredient, and, after com- bining the first emulsion with a second colloidal solu- tion and cooling to cause gelation, a water-soluble wax derivative is added. No pH adjustment or dilution is necessary, and very high yields of non-agglomerated microcapsules are obtained, both in terms of quantity of microcapsules and content of core ingredient. When deet is the core ingredient there is obtained a long- lasting mosquito repellent.

452242

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