Method for preparing aqueous emulsion for coating solid pharmaceutical preparations
US5512092A · kind A · utility
9Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1995 |
| Grant date | Apr 30, 1996 |
| Priority date | — |
| Expiry date | Apr 12, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2301/26
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for preparing an aqueous emulsion for coating solid pharmaceutical preparations comprises the steps of dissolving a cellulosic polymer in a mixed solvent of water and an organic solvent capable of being admixed with water in any rate to give a polymer solution, self-emulsifying the polymer solution by mixing with water and then concentrating the resulting emulsified stock solution. The concentration is carried out by removing a part of the liquid components while passing it through a membrane for ultrafiltration till the polymer concentration of the resulting emulsion reaches a level of not less than 7% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.