Method of making thick water-in-silicone emulsions
US6121373A · kind A · utility
7Cited by
8References
9Claims
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Key dates
| Filing date | Oct 7, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Oct 7, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q15/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Thickening can be obtained by adding a silicone latex to the water phase of a water-in-silicone emulsion, instead of adding the silicone latex to the silicone phase of the emulsion. The latex is used in a range of about 0.1-5.0% by weight. Thick emulsions are made by (i) separately preparing a silicone phase containing a silicone polyether and a cyclic siloxane; (ii) separately preparing an aqueous phase containing water and at least one active ingredient; (iii) adding the latex to the aqueous phase; and (iv) combining and mixing the phases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.