Surfactant-free, water-free, foamable compositions and breakable foams and their uses

218866/2

SURFACTANT-FREE, WATER-FREE, FOAMABLE COMPOSITIONS AND BREAKABLE FOAMS AND THEIR USES

[0001] [Canceled]

BACKGROUND

[0002] Foam compositions with high amounts of hydrophobic solvents are little known in the art. US Patent Application, Publication No. 2008/0206159 relates to a waterless composition and foam as a vehicle in which an active pharmaceutical or cosmetic agent, when added is stable or stabilized by or its destabilization is impeded by the presence of a modulating agent. US Patent Application, Publication No. 2009/0041680 relates to foamable vehicles or carriers comprising at least one wax, waxy substance, counterpart or derivative, a stabilizer, water, and a propellant.

[0003] Foams and, in particular, oleaginous single-phase foams are complicated systems which do not form under all circumstances. Slight shifts in foam composition, such as by the addition of active ingredients or the removal of any of the essential ingredients, may destabilize the foam.

[0004] The prior art teaches oleaginous foam compositions require significant amounts of surface active agents to form and stabilize a foam. These compositions require various standard surfactants, as essential components.

[0005] Surfactants are known as essential ingredients in foam compositions because of their amphiphilic properties and because they are considered essential in forming a foam. However, many surfactants are known to be irritating when left on the skin, as they can extract lipids from - 1 -