Aniperspirant compositions

Patent metadata

Field	Value
Publication number	US-2016113850-A1
Application number	US-201414889874-A
Country	US
Kind code	A1
Filing date	May 20, 2014
Priority date	May 20, 2013
Publication date	Apr 28, 2016
Grant date	—

Abstract

An aqueous composition comprising basic aluminium chloride salt, water soluble calcium salt, and amino acid, characterised in that the basic aluminium chloride salt is of formula AI 2 OH 4.4 CI 1.6 to AI 2 OH 4.9 CI 1.1 and methods for making such compositions having enhanced antiperspirancy performance.

First claim

1 . An aqueous composition comprising basic aluminium chloride salt, water soluble calcium salt, and amino acid, characterised in that the basic aluminium chloride salt is of formula Al 2 OH 4.4 Cl 1.6 to Al 2 OH 4.9 Cl 1.1 , wherein the composition is an oil-in-water emulsion comprising an emulsifier.

2 . A composition according to claim 1 , wherein the molar ratio of calcium to aluminium is at least 1:20 and the molar ratio of amino acid to aluminium is at least 1:10.

3 . A composition according to claim 2 , wherein the molar ratio of calcium to aluminium is at least 1:15 and the molar ratio of amino acid to aluminium is at least 1:4.

4 . A composition according to claim 1 , wherein the water soluble calcium salt is calcium chloride and the amino acid is glycine.

5 . A composition according to claim 1 wherein the basic aluminium chloride salt is of formula Al 2 OH 4.7 Cl 1.3 to Al 2 OH 4.9 Cl 1.1 .

6 . A composition according to claim 1 wherein the basic aluminium chloride has a Band III content measured by SEC of greater than 30%.

7 . A method of attaining an antiperspirant benefit comprising the topical application to the surface of the human body of a composition according to claim 1 .

8 . A method of manufacture of an aqueous antiperspirant composition comprising the steps of: (i) mixing basic aluminium chloride salt, water soluble calcium salt, amino acid, and water, (ii) heating the mixture to a temperature of at least 65° C., and (iii) cooling the mixture to ambient temperature, characterised in that the basic aluminium chloride salt used is of formula Al 2 OH 4.4 Cl 1.6 to Al 2 OH 4.9 Cl 1.1 and wherein the composition is an oil-in-water emulsion comprising an emulsifier.

9 . A method according to claim 8 , wherein the mixture is heated to a temperature of greater than 100° C. at a pressure of greater than 1 Bar (100,000 Pa).

10 . A method according to claim 9 , wherein the mixture is heated to a temperature of greater than 110° C. at a pressure of greater than 2 Bar (200,000 Pa).

11 . A method according to claim 9 , wherein the mixture is heated and pressurised to the temperature and pressure indicated for a period of less than 30 minutes.

12 . A method according to claim 8 , wherein the mixture is heated for sufficient time for the basic aluminium chloride to have a Band III content measured by SEC of greater than 50%

13 . The use of a composition according to claim 1 to deliver excellent antiperspirancy and reduced stickiness.

14 . The use of a composition according to claim 1 to deliver excellent antiperspirancy and reduced staining, in particular reduced yellowing, on clothes.

Assignees

• Conopco Inc Dba Unilever
• Conopco Inc Dba Unilever

Inventors

• Fawzy Karim Mohamed Anwar M
• Franklin Kevin Ronald
• Waterfield Philip Christopher

Classifications

• A61K8/44

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

• A61K8/20

  Halogens; Compounds thereof · CPC title

• A61K2800/591

  Mixtures of compounds not provided for by any of the codes A61K2800/592 - A61K2800/596 · CPC title

• A61K8/26 Primary

  Aluminium; Compounds thereof · CPC title

• A61Q15/00

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