Antiperspirant compositions

Patent metadata

Field	Value
Publication number	US-2016106649-A1
Application number	US-201414889866-A
Country	US
Kind code	A1
Filing date	May 9, 2014
Priority date	May 20, 2013
Publication date	Apr 21, 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 Al 2 OH 4.4 Cl 1.6 to Al 2 OH 4.9 Cl 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 .

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 any of the preceding claims, wherein the water soluble calcium salt is calcium chloride and the amino acid is glycine.

5 . A composition according to any of the preceding claims, wherein the composition is an oil-in-water emulsion comprising an emulsifier.

6 . A composition according to any of the preceding claims 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 .

7 . A composition according to any of the preceding claims wherein the basic aluminium chloride has a Band III content measured by SEC of greater than 30%.

8 . A method of attaining an antiperspirant benefit comprising the topical application to the surface of the human body of a composition according to any of claims 1 to 6 .

9 . 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 .

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

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

12 . A method according to claim 10 or 11 , wherein the mixture is heated and pressurised to the temperature and pressure indicated for a period of less than 30 minutes.

13 . A method according to any claims 9 to 12 , 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%

14 . An antiperspirant salt prepared by drying an aqueous antiperspirant composition manufactured by a method according to any of claims 9 to 13 .

15 . A method of attaining an antiperspirant benefit comprising the topical application to the surface of the human body of an antiperspirant composition prepared according to any of claims 9 to 13 or an antiperspirant salt according to claim 14 .

Assignees

• Conopco Inc Dba Unilever

Inventors

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

Classifications

• A61K8/26

  Aluminium; Compounds thereof · CPC title

• A61K8/19

  containing inorganic ingredients · CPC title

• A61Q15/00

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

• C01P2002/87

  by chromatography data, e.g. HPLC, gas chromatography · CPC title

• C01P2006/90

  Other properties not specified above · CPC title