ct

Patent Pick: Complexing to Simplify the Antiperspirant Equation

July 7, 2017 | Contact Author | By: Rachel Grabenhofer
Close
Fill out my online form.
  • Article
  • Keywords/Abstract
ManApplyingDeodorant850

Keywords: Colgate-Palmolive | stannous fluoride | SnFa | patent application | sweat reduction | complex

Abstract: Colgate-Palmolive inventors aren't sweating the small stuff. In a new patent application, they propose a stannous fluoride-based composition for antiperspirants with sweat control.

Excerpt Only This is a shortened version or summary of the article you requested. To view the complete article, please log in or create an account. Registration is Free!

According to a new patent application, many antiperspirants have been designed to help reduce sweat. In most cases, the actives used are aluminum and zirconium hydroxide compounds, complexes and their derivatives. While these actives are generally effective, alternatives are sought.

Tin (II) fluoride, also known as stannous fluoride (SnFa), is soluble in water but oxidizes to form insoluble precipitates of tin. In addition, tin can form compounds with phosphates.

Thus, according to these inventors, there is still a need to stabilize tin (II) compounds, such as tin (II) fluoride and tin (II) chloride, to make them effective in personal care. Embodiments of this invention are designed to meet these needs. 

Sweat-reducing antiperspirant
WIPO Patent Application WO/2017/117301
Publication date: July 6, 2017
Assignee: Colgate-Palmolive

Described in this patent are water-soluble tin phosphate complexes formed from tin (II) fluoride or tin (II) chloride and a tripolyphosphate salt, e.g., sodium tripolyphosphate (Na5P3O10), and personal care compositions comprising the complexes. 

The inventors discovered that tin (II) fluoride and chloride form complexes upon mixing with said salt and, without being bound by theory, these complexes are believed, when contacted with sweat-simulating proteins, to form a white precipitate that may be an appropriate occlusive active for wetness control. This is due to its ability to form plug that can physically inhibit sweat from skin.