Porous particles in preparations involving immiscible phases

Details Porous particles in preparations involving immiscible phases Porous particles in preparations involving immiscible phases

1989-10-02

1992-08-04

Schain, Howard E.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Cosmetic, antiperspirant, dentifrice

424 59, 424 761, 424405, 424409, A61K 700, A61K 740, A01N 2500

Patent

active

051357402

ABSTRACT:
Immiscible phases, particularly polar and non-polar liquids, semi-solids or solids, are combined in a composition where one is finely dispersed throughout the other without reliance upon emulsifying agents to either create or stabilize the dispersion. The composition is formed by placing the discontinuous phase in the pores of solid inert porous particles, in which the pores are in the form of an interconnected network open to the exterior of the particles to provide interfacial contact with the continuous phase. The particles are then dispersed in the continuous phase. The concept is applicable to oil-in-water and water-in-oil type dispersions, and the disadvantages and shortcomings of emulsifying agents are entirely avoided.

REFERENCES:
patent: 3758686 (1973-09-01), Sieger et al.
patent: 4256609 (1981-03-01), Dale et al.
patent: 4282216 (1981-08-01), Rovee et al.
patent: 4336070 (1982-06-01), Koghugi
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patent: 4435524 (1984-03-01), Dinbergs
patent: 4478818 (1984-10-01), Shell et al.
patent: 4542069 (1985-09-01), Mauz et al.
patent: 4590068 (1986-05-01), Berthet et al.
patent: 4690825 (1987-09-01), Won
patent: 4818542 (1989-04-01), DeLuca et al.

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