US 5,292,530 AGranted

Stable anhydrous topically-active composition and suspending agent therefor

AssigneeHelene Curtis, Inc.

InventorsAndrew D. McCrea, Michael P. Diulus

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Abstract

An anhydrous, topically-effective composition that resists phase separation and exhibits improved properties comprising a topically-active compound, such as an astringent salt; an improved suspending agent comprising a finely-divided silica and a suspending wax composition; and a suitable volatile liquid carrier, such as a volatile silicone or a volatile hydrocarbon. The suspending wax composition comprises a wax, an ester including at least 10 to about 32 carbon atoms and a volatile liquid carrier. The anhydrous, topically-effective composition is useful in topical cosmetic and medicinal preparations, such as antiperspirants, sunscreens and topical drug products, and is especially useful in cosmetic and medicinal preparations wherein an insoluble topically-active compound is dispersed throughout a liquid phase.

Claims46

Dependent claims

An antiperspirant composition comprising:

(a) about 0.01% to about 50% by weight of an antiperspirant compound;
(b) from about 20% to about 98.89% by weight of a volatile liquid carrier selected from the group consisting of a cyclic volatile silicone having a viscosity of about 0.5 to about 10 centistokes, a linear volatile silicone having a viscosity of about 0.5 to about 10 centistokes, a volatile hydrocarbon including from about 10 to about 30 carbon atoms, and combinations thereof;
(c) from about 0.1% to less than 2% by weight of a finely-divided silica;
and
(d) from about 1% to about 15% by weight of a suspending wax composition, wherein the suspending wax composition comprises from about 5% to about 50% by weight of a wax having a melting point of at least 150.degree. F.;
from about 0.1% to about 94.9% by weight of a volatile solvent selected from the group consisting of a volatile silicone, a volatile hydrocarbon and a combination thereof, wherein said volatile silicone has a viscosity of about 0.5 to about 10 centistokes and said volatile hydrocarbon includes from about 10 to about 30 carbon atoms;
and from about 0.1% to about 94.4% by weight of an ester including at least 10 to about 32 carbon atoms, provided that the composition includes about 4.5% or less by weight of the wax.

4 more elements

Dependencies are inferred from the claim text.