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US 8,240,509 B2Granted
Pressure vessel containing polyethylene glycols and carbon dioxide as a propellant
AssigneeAerosol Service AG
InventorJörg Geiger
Life of this patent
Estimating the term…
Abstract
Disclosed are pressure vessels, especially an aerosol container, which comprise an interior that is subdivided into a storage chamber (3) and a propellant chamber (4) and are operated by means of a two-phase propellant. The gas phase (5) of the propellant encompasses carbon dioxide while the liquid phase (6) encompasses polyethylene glycol and/or a (C1-C4) monoether and/or a (C1-C4) diether of a polyethylene glycol, and carbon dioxide that is dissolved therein.
Claims14
A pressure vessel for receiving a pressurized substance in gaseous, liquid or finely particulate form, said pressure vessel comprising:
- a wall with an inner wall face that defines an interior space of the pressure vessel;
- and
- a separating part located in the interior space and dividing the interior space into a storage chamber and into a propellant chamber,
- wherein the storage chamber contains the substance and the propellant chamber contains a propellant,
- wherein the separating part is configured to permit liquid-tight division into the storage chamber and the propellant chamber and, under the action of the propellant, is configured to vary the ratio of the volume of the storage chamber to the volume of the propellant chamber in favour of the volume of the propellant chamber, and
- wherein the propellant comprises:
- a) a gas phase comprising carbon dioxide, and
- b) a liquid phase comprising (i) a compound, chosen from the group consisting of polyethylene glycols, their (C1-C4) monoethers, and their (C1-C4) diethers, and (ii) carbon dioxide dissolved therein.
5 more elements
Dependencies are inferred from the claim text.