Method of forming fluid filled microcapsules

Details Method of forming fluid filled microcapsules Method of forming fluid filled microcapsules

1987-02-11

1989-12-19

Terapane, John F.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

264 41, 264 44, A61J 504

Patent

active

048881406

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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Concise Chemical and Technical Dictionary, 4th ed., New York, Chemical Publishing Co., 1986, pp. 528, 1054.
Goodwin, J. T. et al, "Physical Methods for Preparing Microcapsules" in: Vandegaer, J. E., ed., Microencapsulation Processes and Applications (New York, Plenum Press, 1974), pp. 155-163.

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