Stable acidic oil-in-water type emulsions and compositions containing them
US5863545A · kind A · utility
6Cited by
9References
22Claims
0Family size
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Inventor
Key dates
| Filing date | Mar 25, 1996 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Mar 25, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q19/008
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Oil-in-water type emulsions having a pH below or equal to 3.5, especially a pH below or equal to 3, and comprising as a stabilizing agent a substantially water-soluble crosslinked anionic copolymer consisting of units derived from the reaction between (i) acrylamide, (ii) 2-acrylamido-2-methylpropanesulfonic acid and (iii) at least one compound possessing multiple olefinic unsaturation (crosslinking agent), in which the compound possessing multiple olefinic unsaturation is present in the copolymer at a concentration of between 0.06 and 1 mmol per mole of the collective monomer units, are stable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.