Method of forming fluid filled microcapsules
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United States of America Patent
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Dec 19, 1989
Grant Date -
N/A
app pub date -
Feb 11, 1987
filing date -
Feb 11, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention is a process for preparing round, fluid filled microcapsules by the simultaneous extrusion, of core and shell material from coaxially aligned and concentric extrusion nozzles into a surrounding carrier fluid moving in the direction of the extrusion wherein a surfactant having affinity with the carrier fluid is added to the carrier fluid. When the carrier fluid is an oil based carrier, a lipophilic emulsifier such as a sorbitan monoester of a fatty acid can be used.
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