Antimicrobial cleansing composition

Patent metadata

Field	Value
Publication number	US-9994691-B2
Application number	US-201515513998-A
Country	US
Kind code	B2
Filing date	Sep 14, 2015
Priority date	Sep 29, 2014
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

The present invention relates to an antimicrobial cleansing composition and a method of cleaning or disinfecting a surface. The invention more particularly relates to an antimicrobial cleansing composition that provides antimicrobial efficacy in cleaning applications having relatively short contact times. An object of the present invention is to provide an antimicrobial cleansing composition that exhibits biocidal activity in relatively short contact times of 1 minute to 10 seconds. Another object of the present invention is to provide an antimicrobial cleansing composition which exhibits antimicrobial activity at very low concentration of silver compound. A further object of the present invention is to provide an antimicrobial cleansing composition which has consumer-acceptable aesthetic properties. A still further object of the present invention is to provide an antimicrobial composition that is highly efficacious against a broad spectrum of gram positive and gram negative bacteria. We have determined that antibacterial activity in relatively short contact times against gram positive and gram negative microorganisms in a soap based cleansing composition having silver compound enhances considerably in presence of a further salt of carboxylic acid. It has been additionally found that the antibacterial activity is enhanced even at very low concentrations of silver compound.

First claim

The invention claimed is:

1. An antimicrobial cleansing composition comprising:
(i) 1 to 85% by weight of a fatty acid soap;
(ii) 0.1 to 100 ppm by weight of a silver(I) compound; and, further comprises,
(iii) 0.5 to 10% by weight of a salt of carboxylic acid
wherein the salt of carboxylic acid is a non-metal salt of carboxylic acid.

2. A composition as claimed in claim 1 wherein the fatty acid soap comprises an alkali metal salt of aliphatic alkane- and/or alkene monocarboxylic acids having 8 to 18 carbon atoms.

3. A composition as claimed in claim 1 wherein said composition further comprises a surfactant selected from anionic surfactant or amphoteric surfactant.

4. A composition as claimed in claim 3 wherein said anionic surfactant is alkyl ether sulphate.

5. A composition as claimed in claim 1 wherein at 25° C., a 1 wt % solution of the composition in water has a pH in a range of from 9 to 12.

6. A composition as claimed in claim 1 wherein the salt of carboxylic acid is selected from an oxalate, lactate, fumarate, phthalate, benzoate, maleate, malate, malonate or citrate.

7. A composition as claimed in claim 6 wherein said salt of carboxylic acid is selected from a lactate, malate, malonate, or citrate.

8. A composition as claimed in claim 1 wherein said silver compound (I) is a silver oxide or silver sulphate.

9. A composition as claimed in claim 1 comprising 0.5 to 5 ppm silver (I) compound.

10. A composition as claimed in claim 1 is in the form of a bar, liquid or gel.

11. A method of cleaning or disinfecting a surface comprising the steps of applying a composition as claimed in claim 1 on to said surface and at least partially removing the composition from the surface.

12. A method as claimed in claim 11 wherein the step of at least partially removing the composition is carried out less than 5 minutes after the step of applying the composition on the substrate.

Assignees

• Conopco Inc Dba Unilever
• Conopco Inc

Inventors

• Appavoo Shanthi
• Dasgupta Anindya
• Gupta Satyaranjan
• Paruchuri Divya
• Saji Maya Treesa
• Salgaonkar Neha

Classifications

• C11D9/26 Primary

  containing oxygen {(C11D9/225 takes precedence)} · CPC title

• C08K3/08 Primary

  Metals · CPC title

• A61K2800/5426

  cationic · CPC title

• C11D10/042

  based on anionic surface-active compounds and soap · CPC title

• C08K2003/0806

  Silver · CPC title