Aerosol dispensing system

In an aerosol system for dispensing an antiperspirant where the system includes a metal container having a valve-controlled spray, a valve for dispensing the contents thereof, and a dip tube extending from said valve to said container contents, a propellant for said system, and wherein said contents includes an anti-perspirant material such as the astringent salts of multi-valent cations, divalent astringent salts, tetravalent astringent salts, trivalent astringent salts and aluminum astringent salts, wherein said anti-perspirant material if dissolved in water forms a material corrosive with respect to the exposed metal of said container, the improvement comprising:

• a multiplicity of encapsulated droplets having a particle size of not greater than about 0.004 inches,
• said droplets including an aqueous inner phase which if it contacts said anti-perspirant material will corrode any exposed metal of said container,
• said droplets including an outer phase of particles of a super-hydrophobic fumed silica,
• said outer phase operating to encapsulate said aqueous inner phase while said droplets are within said container and to rupture when said container contents are dispersed, and
• said water being present in an amount sufficient to activate said anti-perspirant material.

A composition for use as an anti-perspirant and to be packaged in a container including exposed metal surfaces, said composition including as the essential ingredients:

• a multiplicity of encapsulated droplets having a particle size of not greater than about 0.004 inches,
• an anti-perspirant material which if contacted by water will corrode any exposed metal surfaces of said container,
• said encapsulated droplets including an outer phase of a particulate super-hydrophobic fumed silica,
• said fumed silica having a particle size of less than 0.007 microns, and
• said encapsulated droplets including an inner phase of aqueous solution.