Low residue antiperspirant gel-solid stick compositions containing select gellants

Abstract

Anhydrous antiperspirant gel-solid stick compositions are disclosed comprising a particulate antiperspirant active, a solid non-polymeric gelling agent selected from the group consisting of 12-hydroxystearic acid, 12-hydroxystearic acid, esters, amides of 12-hydroxystearic acid, and combinations thereof; and an anhydrous liquid carrier, the average solubility parameter ((cal / cm 3 ) 0.5 ) is about 3-13; wherein the visible residue index of the composition is about 11-30 L-value, the product hardness is about 500-5000 g·force, elastic modulus (G′) and viscous modulus (G″) The ratio is about 0.1-100.The refractive indices of the particulate antiperspirant active, the solid non-polymeric gelling agent and the anhydrous liquid carrier need not be matched. The solid non-polymeric gelling agent preferably has an average particle size of less than about 1 micron and / or crystalline particles in the form of elongated particles having an aspect ratio greater than about 2. These antiperspirant gel-solid stick compositions provide improved low residue performance, efficacy and aesthetics.

Description

[0001] Field of study [0002] The present invention relates to antiperspirant compositions in the form of gel-solid sticks. In particular, the present invention relates to antiperspirant compositions in gel-solid stick form that provide improved low residual performance, efficacy and aesthetics and contain selected coagulants. Background technique [0003] Various 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 or aluminium salts or combinations thereof) into a suitable carrier. These products should have effective antiperspirant and odor suppression properties and be aesthetically acceptable when or after application to the underarms or other skin areas. [0004] Of these products, solid antiperspira...

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