US 4,380,505 AGranted

Apparatus for producing aerosol product

AssigneeVon Treu AG

InventorAugustinus J. M. Wittenhorst

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Abstract

The aerosol product, for example a cosmetic or pharmaceutical preparation, contains an active agent, a propelling agent and a solvent; with a view to protect the environment and the users the propelling agent is comprised exclusively of, helium, neon, argon, krypton or mixtures of these gases. A percentage of at least 80% by weight of argon with respect to the total weight of the propelling agent has proved to be particularly interesting. The method consist mainly in contacting the active agent and the solvent into an autoclave, introducing a compressed noble gas in a predetermined amount and collecting the mixture obtained. The mixing process may be repeated in other autoclaves with different noble gases. The device comprises mixtures (1,2;3) for storing the active agent and the solvent connected, as well as a pressure accumulator (a) for noble gases, to an autoclave (12) on which an outlet connection (14) is fixed, above the ground. Several autoclaves (15, 18) may be provided as well as a filter having the shape of a candle (22, 10a), arranged after the last autoclave (18) and/or before the first autoclave (12 ).

Claims3

Dependent claims

Apparatus suitable for the production of an aerosol product consisting of active substance, propellant and solvent wherein the propellant consists exclusively of a noble gas which is helium, neon, argon, krypton or mixtures thereof by a process comprising bringing together the active substance and the solvent under pressure, charging overhead to a pressure vessel and seeping therein, while at the same time introducing into the pressure vessel a compressed noble gas and adding the noble gas by doses to the active substance-solvent mixture and subsequently collecting the newly developed mixture and feeding it to a bottling plant, said apparatus comprising a mixing vessel (1, 2) for the storage of active substance, a mixing vessel (3) for the storage of solvent, whereby the mixing vessels (1, 2;

3) have feed lines (4, 5;
6) separated from one another and are provided with discharge lines (7, 8;
9) which converge to a common conveying line (10), furthermore characterized by a pressure tank (12) with an inlet connection (11) overhead, which is connected to the common conveying line (10), an additional inlet connection (13) overhead, to which a compression tank (12a) for noble gas has been connected as well as a discharge connection (14) which is disposed at a distance from the bottom of the pressure vessel (12).

Dependencies are inferred from the claim text.