Water-in-oil emulsions containing increased amounts of oil and methods for preparing same
US5746945A · kind A · utility
12Cited by
13References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Feb 28, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/01
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Water-in-oil emulsions are disclosed that comprise PA1 (a) water; PA1 (b) from about 10 to 65% by weight of an oil; and PA1 (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.