Stabilized static liquid membrane compositions

Details Stabilized static liquid membrane compositions Stabilized static liquid membrane compositions

1976-06-17

1978-04-11

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

252314, 252522, 424 19, B01J 1300

Patent

active

040837980

ABSTRACT:
The instant invention relates to novel compositions, methods for their preparation and the use of said compositions for the purposes of slow or controlled release of active ingredients such as fragrances and pharmaceuticals. These novel compositions are prepared by dispersing an aqueous phase into an oil to form a first emulsion. This first emulsion is then dispersed as droplets in a second aqueous phase in the presence of a water soluble protein and a gelling polysaccharide. These novel compositions are characterized as stable to layering and coalescence of the droplets of the first emulsion while retaining pourability. In the internal phase of the droplets of the first emulsion active ingredients such as fragrances and pharmaceuticals may be retained and can be released either over a long period of time by permeation due to the solubility of said active ingredients in the external phase of the first emulsion or can be retained indefinitely until the first emulsion is broken to release instantaneously the active ingredients.

REFERENCES:
patent: 1440356 (1922-12-01), Morrell
patent: 1914902 (1933-06-01), Volck
patent: 3399263 (1968-08-01), Strazdins et al.

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