Antiperspirant gel-solid stick compositions substantially free of select polar solvents

Abstract

Disclosed are anhydrous antiperspirant gel-solid sticks which comprise particulate antiperspirant active; a solid non-polymeric gellant that is substantially free of dibenzylidene alditol, inorganic thickening agents, organic polymeric gellants, n-acyl amino acid derivatives, and combinations thereof; an anhydrous liquid carrier that is substantially free of polar, water-immiscible, organic solvents, wherein the composition has a visible residue index of from about 11 to about 30 L-value, a product hardness of from about 500 to about 5,000 gram-force, a rheology profile defined by a ratio of an elastic modulus (G') to a viscous modulus (G'') of from about 0.1 to about 100. The refractive indices of the particulate antiperspirant active, the solid non-polymeric gellant, and the anhydrous liquid carrier are not matched. The compositions preferably comprise crystalline gellant particles having an average particle size of less than about 1 mu m and / or a particle morphology having an aspect ratio of greater than about 2. These compositions provide improved low residue performance, efficacy and aesthetics.

Description

[0001] Field [0002] The present invention relates to antiperspirant compositions in the form of gel-solid sticks. In particular, the present invention relates to selected compositions in the form of gel-solid sticks that provide improved low residue performance, efficacy and aesthetics and are substantially free of polar, water-immiscible organic solvents or liquid carriers. Background technique [0003] A variety of topical antiperspirant products are commercially available or known in the antiperspirant art. Most products are formulated as aerosols or sprays, roll-on liquids, creams, lotions, gels, gel-solids or other solid stick formulations and include astringent substances such as zirconium salt or aluminum salt or a combination thereof) into a suitable carrier. These products should provide effective perspiration and odor control and be aesthetically acceptable when or after application to the armpits or other are...

AI Technical Summary

Problems solved by technology

However, the gel-solids described by Hofrichter et al. are limited to selected dual gellant systems and do not include or otherwise describe the preparation of low-residue antiperspirant gels containing any other gellant or gellant system. Glue - any method of solid stick