Process for the production of multiple w/o/w emulsions
US5714154A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1995 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Dec 20, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q19/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for the production of multiple w/o/w emulsions in which PA1 a) a mixture of an oil and a lipophilic emulsifier I comprising glycerol and/or oligoglycerol or polyglycerol fatty acid esters is initially processed with intensive shearing to form a w/o pre-emulsion A, and PA1 b) the w/o pre-emulsion A is then further treated with an aqueous emulsifier II comprising adducts of ethylene oxide with fatty alcohols and/or sterols and, optionally, fatty alcohols, wherein the treatment is accompanied by gentle shearing; and to the resulting multiple w/o/w emulsions and their use in the preparation of cosmetic and pharmaceutical products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.