Process of isolating cyclohexane-free ethylcellulose microcapsules
US4107072A · kind A · utility
6Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 25, 1973 |
| Grant date | Aug 15, 1978 |
| Priority date | — |
| Expiry date | May 25, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2989
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Ethylcellulose walled microcapsules, obtained from cyclohexane medium are heavily solvated with cyclohexane and tend to form lumps even after drying. Displacements of cyclohexane by pentane, hexane, heptane or octane or mixtures thereof during the isolation of the microcapsules gives a dry product which is essentially all discrete dry microcapsules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.