Anhydrous antiperspirant aerosol compositions

Patent metadata

Field	Value
Publication number	US-2018015012-A1
Application number	US-201515520615-A
Country	US
Kind code	A1
Filing date	Oct 22, 2015
Priority date	Oct 27, 2014
Publication date	Jan 18, 2018
Grant date	—

Abstract

An anhydrous antiperspirant aerosol composition comprising a particulate antiperspirant active system, suspending agent, carrier oil, and liquefied propellant gas, characterised in that the particulate antiperspirant active system comprises an aluminium sesquichlorohyrate of formula AI 2 OH 4.4 CI 1.6 to AI 2 OH 4.9 CI 1.1 activated with a water soluble calcium salt.

First claim

1 . An anhydrous antiperspirant aerosol composition comprising a particulate antiperspirant active system, suspending agent, carrier oil, and liquefied propellant gas, characterised in that the particulate antiperspirant active system comprises an aluminium sesquichlorohyrate of formula Al 2 OH 4.4 Cl 1.6 to Al 2 OH 4.9 Cl 1.1 activated with a water soluble calcium salt.

2 . A composition according to claim 1 , wherein the particulate antiperspirant active system comprises an aluminium sesquichlorohyrate of formula Al 2 OH 4.4 Cl 1.6 to Al 2 OH 4.9 Cl 1.1 activated with a water soluble calcium salt and an amino acid.

3 . A composition according to claim 2 , wherein amino acid is glycine.

4 . A composition according to claim 1 , to claim 1 , wherein the aluminium sesquichlorohyrate in the particulate antiperspirant active system has a Band III content of at least 40%.

5 . A composition according to claim 4 , wherein the aluminium sesquichlorohyrate in the particulate antiperspirant active system has a Band III content of at least 60%.

6 . A composition according to claim 4 , wherein the aluminium sesquichlorohyrate in the particulate antiperspirant active system has a Band III to Band II ratio of 2:1 or greater.

7 . A composition according to claim 6 , wherein the aluminium sesquichlorohyrate in the particulate antiperspirant active system has a Band III to Band II ratio of 5:1 or greater

8 . A composition according to claim 1 , wherein the aluminium sesquichlorohyrate in the particulate antiperspirant active system has a molar ratio of calcium to aluminium of at least 1:20 and a molar ratio of amino acid to aluminium of at least 1:10.

9 . A composition according to claim 8 , wherein the aluminium sesquichlorohyrate in the particulate antiperspirant active system has a molar ratio of calcium to aluminium of at least 1:15 and the molar ratio of amino acid to aluminium of at least 1:4.

10 . A method of manufacture of an antiperspirant composition according to claim 1 , wherein an aqueous solution of aluminium sesquichlorohyrate of formula Al 2 OH 4.4 Cl 1.6 to Al 2 OH 4.9 Cl 1.1 is heated with a water soluble calcium salt to achieve a Band III content of at least 40% before being spray dried to give a powder which is subsequently formulated with a suspending agent, carrier oil and liquefied propellant gas.

11 . A method according to claim 10 , wherein the solution of aluminium sesquichlorohyrate of formula Al 2 OH 4.4 Cl 1.6 to Al 2 OH 4.9 Cl 1.1 is heated with a water soluble calcium salt and an amino add to achieve a Band III content of at least 55% before it is spray dried.

12 . A method according to claim 10 , wherein the spray-dried powder has or is given a mean (D50) particle size that is from 20 to 30 microns before being formulated with the suspending agent, carrier oil and liquefied propellant gas.

13 . A method according to claim 10 , wherein the water soluble calcium salt is calcium chloride.

14 . A method according to claim 10 , wherein the aluminium sesquichlorohyrate is of formula Al 2 OH 4.7 Cl 1.3 to Al 2 OH 4.9 Cl 1.1 .

15 . The use of a composition according to claim 1 , for topical delivery to the surface of the human body to give an antiperspirancy benefit.

Assignees

• Conopco Inc Dba Unilever

Inventors

• Court Duncan Alexander
• Franklin Kevin Ronald
• Waterfield Philip Christopher

Classifications

• A61K8/20

  Halogens; Compounds thereof · CPC title

• A61Q15/00

  Anti-perspirants or body deodorants (deodorisation of air A61L9/00) · CPC title

• A61K2800/31

  Anhydrous · CPC title

• A61K8/416

  Quaternary ammonium compounds (A61K8/35 takes precedence) · CPC title

• A61K8/44

  Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof · CPC title