Process for the preparation of hollow particulates

Details Process for the preparation of hollow particulates Process for the preparation of hollow particulates

1975-09-19

1978-11-28

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By extrusion spraying or gravity fall through orifice

B01J 202

Patent

active

041276221

ABSTRACT:
A hollow particulate for gastric medicines and other durable medicines suspendable in the gastric juice and remainable in the stomach for a long period of time is provided which has been prepared by dissolving ethylcellulose in a lower chlorinated hydrocarbon, or a mixed solution of the lower chlorinated hydrocarbon and a lower chlorofluorinated hydrocarbon and/or water, so that the concentration of ethylcellulose is 0.5 - 4% by weight on the basis of the total weight of the resulting solution, and then spray-drying the solution at an inlet temperature of higher than 50.degree. C.

REFERENCES:
patent: 3080293 (1963-03-01), Koff
patent: 3341415 (1967-09-01), Scott
patent: 3499962 (1970-03-01), Wurzburg
patent: 3888957 (1975-06-01), Netting

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