Process for producing a W/O/W type multiple emulsion for medicines, cosmetics, etc.
US4971721A · kind A · utility
11Cited by
6References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 19, 1988 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Sep 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/925
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process is provided for producing a water-oil-water type multiple emulsion comprising: PA0 a. adding an emulsifying amount of polyglycerol polyricinoleate to an oil phase; PA0 b. forming an oil in water emulsion by adding the product of step a to an aqueous phase; PA0 c. inverting the oil in water emulsion of step b into a water in oil emulsion by agitating; and PA0 d. forming a water-oil-water emulsion by adding the water in oil emulsion of step c to an outer aqueous phase. The emulsions produced by this process are useful for preparing medicines and cosmetics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.