Water-in-oil emulsions containing increased amounts of oil and methods for preparing same
US6423303B1 · kind B1 · utility
17Cited by
13References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2000 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Mar 23, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/01
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Water-in-oil emulsions are disclosed that comprise(a) water;(b) from about 10 to 65% by weight of an oil; and(c) an emulsification system comprising a polysiloxane polyalkyl polyether copolymer and a phthalic anhydride derivative, substantially permanently maintaining the water and oil as an emulsion, the emulsification system and the emulsification system being substantially free from aluminum and zirconium salts, the emulsion being at a pH of from about 5 to 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.