Method for reducing the water desorption of an active composition carried by a supporting medium
US4619824A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1983 |
| Grant date | Oct 28, 1986 |
| Priority date | — |
| Expiry date | Nov 3, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L9/05
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The method comprises the treatment of the composition and/or the substrate with at least one compatible polar substance selected among compounds which are susceptible, on one hand, to impart finally to the substrate or to said composition an ionic charge opposite to that of the other one or to excite the ionic charge inherent to the treated composition and/or substrate if that charge is already opposite to that of the other one and, on the other hand, to obtain at the same time a hydrophilic/lipophylic balance (HLB) such that the surface tension of the couple supporting medium-composition is lower than the surface tension of the couple supporting medium-water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.