Abstract: The invention provides a process and apparatus for delivering from a delivery port of an aerosol container having a vapor tap valve a spray of low flammability of a liquid aerosol composition containing a flammable liquefied propellant, which comprises mixing together liquid aerosol composition and gaseous propellant; subjecting the gas/liquid mixture to the constraint imposed by a flow constriction; expanding the gas/liquid mixture; subjecting the gas/liquid mixture to the constraint imposed by a second flow constriction, and again expanding the gas/liquid mixture and then passing the mixture through the remainder of the vapor tap valve to the delivery port; with each constraint and expansion increasing the gas:liquid volume ratio of the mixture and reducing the flammability of the mixture as a delivered spray.

Abstract: Aerosol antiperspirant compositions are provided that are highly concentrated with respect to the active astringent salt, and capable of being dispensed from aerosol containers of the foam type at a low delivery rate, comprising, in combination, an astringent salt in an amount within the range from about 8 to about 30%; a liquefied propellant, or a mixture of liquefied propellants, each with a vapor pressure at 21.degree. C. of at least 2.4 atmospheres absolute, having a low molecular weight, in an amount of at least 0.15 mole per atmosphere absolute pressure in the container at 21.degree. C. per 100 g of composition; a nonvolatile miscible organic liquid in an amount within the range from about 0.1 to 30% by weight of the composition; a bulking agent in an amount within the range from about 0.1 to about 5% by weight of the composition; and a solid aliphatic carboxylic acid having from about fourteen to about twenty-two carbon atoms in a straight chain and in an amount within the range from about 0.

Abstract: Aerosol antiperspirant compositions are provided, capable of dispensing active astringent salt from aerosol containers with low mistiness and dustiness, comprising, in combination, an astringent salt in an amount within the range from about 3 to about 30%; a hydrocarbon or halocarbon propellant; a synthetic polymer gum having a viscosity within the range from about 500,000 to about 100 million centistokes at 25.degree. C. in an amount within the range from about 0.05 to about 5% by weight of the composition; and optionally, an aliphatic, cycloaliphatic, or aromatic carboxylic acid having from about nine to about fifty carbon atoms, comprising all or part of a nonvolatile miscible organic liquid or oil in an amount within the range from about 0.1 to about 30% by weight of the composition.

Abstract: An aerosol container is provided, especially intended for use with compositions containing liquefied flammable propellants, and having a gas-permeable membrane that is impermeable or at best only slowly permeable by liquefied propellants, and impeding liquid flow via a gas tap orifice through an open manually-operated delivery valve, at least when the container is tipped from the upright position beyond the horizontal towards the fully inverted position, the container comprising, in combination, a pressurizable container having at least one storage compartment for an aerosol composition and a liquefied propellant in which compartment liquefied propellant can assume an orientation according to orientation of the container between a horizontal and an upright position, and a horizontal and an inverted position; a delivery valve movable manually between open and closed positions, and including a valve stem and a delivery port; an aerosol-conveying passage in flow connection at one end with the storage compartment

Abstract: An aerosol container is provided, especially intended for use with compositions containing liquefied flammable propellants, and having a shut-off valve closing off flow through an open manually-operated delivery valve whenever the container is tipped from the upright position beyond the horizontal towards the fully inverted position, the container comprising, in combination, a pressurizable container having at least one storage compartment for an aerosol composition and a liquefied propellant in which compartment propellant can assume an orientation according to orientation of the container between a horizontal and an upright position, and a horizontal and inverted position; a delivery valve movable manually between open and closed positions, and including a valve stem and a delivery port; an aerosol-conveying passage in flow connection at one end with the storage compartment and at the other end with the delivery port, manipulation of the delivery valve opening and closing the passage to flow of aerosol comp

Abstract: This invention relates to a novel astringent antiperspirant aerosol system which comprises an astringent salt suspended in fine powder form in an anhydrous liquid vehicle and a propellant.