Thermally reversible water in oil in water emulsions
US6995209B2 · kind B2 · utility
6Cited by
11References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2002 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Mar 21, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/913
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A thermally reversible water in oil in water (W/O/W) emulsion including a thermally reversible viscosifying polymer in the continuous aqueous phase of the emulsion. The thermally reversible viscosifying polymer of the W/O/W emulsion includes a block copolymer having at least a first polyoxyalkylene block having a hydrophobic region and a hydrophilic region effective to form micelles in solution in response to a change in temperature, and at least a second block comprising a poly(vinylcarboxylic acid).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.