Method for preparing microcapsules by double emulsion

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United States of America Patent

PATENT NO 10807060
APP PUB NO 20180185809A1
SERIAL NO

15759746

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Abstract

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A method for preparing solid microcapsules, comprising the steps of adding under agitation a composition C1 comprising at least one active material to a cross-linkable liquid composition C2, the active material is not an additive to be used in the lubricant, fuel or bitumen industries, drilling sludges or muds, or oil exploration/production, compositions C1 and C2 being immiscible with each other. A first emulsion is obtained comprising droplets of composition C1 dispersed in composition C2, adding under agitation the first emulsion to a liquid composition C3, composition C3 and composition C2 being immiscible with each other, to obtain a second emulsion comprising droplets dispersed in composition C3. Loading the second emulsion in a mixer which applies a homogeneous controlled shear rate to said second emulsion, said shear rate being from 1 000 s-1 to 100 000 s-1, to obtain a third emulsion comprising droplets dispersed in composition C3, and cross-linking the droplets so that solid microcapsules dispersed in composition C3 are obtained.

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Patent Owner(s)

Patent OwnerAddress
CALYXIA94380 BONNEUIL-SUR-MARNE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bibette, Jérôme Paris, FR 28 106
Demoulin, Damien Paris, FR 15 11
Walters, Jamie Paris, FR 14 12

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