Container, method and composition for controlling the release of a volatile liquid from an aqueous mixture
US4793555A · kind A · utility
118Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1988 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Apr 22, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L9/042
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Films and coatings formed from a specified class of organosiloxane/urethane copolymers are unique by virtue of their high permeability to volatile ingredients in the form of aqueous compositions and their inertness to the ingredients of these compositions. Containers wherein at least a portion of the walls comprise films or coatings formed from these copolymers are used to achieve the controlled release of volatile fragrances and biologically active agents from aqueous compositions confined within the container into the adjacent atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.