Fluid sprinkling – spraying – and diffusing – Slow diffusers – With wick or absorbent means removing liquid from holder
Patent
1988-11-15
1990-04-10
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Slow diffusers
With wick or absorbent means removing liquid from holder
239 54, 239 55, A61L 904
Patent
active
049153013
ABSTRACT:
Volatile substances such as fragrances, perfumes, deodorizers, room freshener compositions and the like are dispensed in vapor phase from a container holding the substance in liquid phase at room temperature and under atmospheric pressure. The container has a window covered with a microporous membrane with an active structure formed from a material having a critical surface tension that is below the surface tension of the liquid substance. Generally the active membrane material has a critical surface tension that is below 22 dynes/cm and preferably below 20 dynes/cm while the surface tension of the liquid is at least 22 dynes/cm. One example is an ultraviolet irradiated polymer composition with 0.2 microns nominal pore size. In all instances the volatile substance is first sorbed within a porous element and desorbed therefrom for transport through the membrane only in its vapor phase.
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Forman Michael J.
International Flavors & Fragrances Inc.
Kashnikow Andres
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