Method of forming fluid filled microcapsules
US4888140A · kind A · utility
38Cited by
12References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1987 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Feb 11, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B1/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.