Acidic biofilm remediation

Patent metadata

Field	Value
Publication number	US-11723364-B2
Application number	US-202117448153-A
Country	US
Kind code	B2
Filing date	Sep 20, 2021
Priority date	Mar 11, 2011
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

Methods and compositions for biofilm remediation are disclosed. Biofilm is reduced and removed from soiled surfaces by providing to a surface in need an effective amount of a composition comprising a biocidal surfactant and at least one organic solvent. According to the invention, the biofilm remediation compositions reduce and remove biofilm formation by administering a one-step cleaner and disinfectant. The biofilm remediation compositions are stable and effective in concentrated and diluted ready-to-use formulations comprising an anionic sulfated or sulfonated surfactant that is not an organocarboxylic acid, a sparingly soluble organic solvent and optionally a soluble organic solvent.

First claim

What is claimed is:

1. A biocidal composition comprising:
from about 0.2 to about 2 wt-% of an anionic surfactant, wherein the anionic surfactant is not a C 1 -C 5 organocarboxylic acid and is a sulfonated acid;
from about 0.8 to about 2 wt-% of a soluble organic solvent in dilution; and
from about 0.5 to about 5 wt-% of a sparingly soluble organic solvent in dilution;
wherein the composition has a pH of less than about 7 and has sanitizing efficacy against biofilm.

2. The composition of claim 1 wherein the anionic surfactant is selected from the group consisting of C 8 -C 22 alkyl sulfonate, linear alkyl benzene sulfonic acid, diphenylated sulfonates, sulfonated oleic acid, and mixtures thereof.

3. The composition of claim 1 wherein the sparingly soluble organic solvent is selected from the group consisting of diethylene glycol n-butyl ether, diethylene glycol n-propyl ether, diethylene glycol ethyl ether, diethylene glycol methyl ether, diethylene glycol t-butyl ether, dipropylene glycol n-butyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol propyl ether, dipropylene glycol tert-butyl ether, ethylene glycol butyl ether, ethylene glycol propyl ether, ethylene glycol ethyl ether, ethylene glycol methyl ether, ethylene glycol methyl ether acetate, propylene glycol n-butyl ether, propylene glycol ethyl ether, propylene glycol methyl ether, propylene glycol n-propyl ether, tripropylene glycol methyl ether and tripropylene glycol n-butyl ether, ethylene glycol phenyl ether, propylene glycol phenyl ether and mixtures thereof.

4. The composition of claim 3 wherein the sparingly soluble and soluble organic solvents are dipropylene glycol methyl ether and propylene glycol phenyl ether.

5. The composition of claim 1 wherein the composition is diluted with water, wherein the dilution is between about 5 parts water per 1 part concentrated composition and about 128 parts water per 1 part concentrated composition and wherein said pH is less than about 7.

6. The composition of claim 1 wherein the composition is diluted with water, wherein the dilution is between about 8 parts water per 1 part concentrated composition and about 64 parts water per 1 part concentrated composition and wherein said pH is less than about 7.

7. The composition of claim 1 wherein the composition is diluted with water, wherein the dilution is less than about 32 parts water per 1 part concentrated composition and wherein said pH is less than about 4.

8. The composition of claim 1 wherein the composition is diluted with water, wherein the dilution is between about 16 parts water per 1 part concentrated composition and about 64 parts water per 1 part concentrated composition and wherein said pH is less than about 4.

9. The composition of claim 1 , further comprising between about 0.01 and about 35 wt-% of an oxidizing agent, wherein the oxidizing agent comprises hydrogen peroxide having an active concentration of 70% or greater, and wherein the composition does not contain a peroxycarboxylic acid or a halogen.

10. A method of biofilm remediation comprising:
contacting a biocidal composition to a biofilm, wherein the composition comprises from about 0.2 to about 20 wt-% of an anionic surfactant, wherein the anionic surfactant is not a C 1 -C 5 organocarboxylic acid and is a sulfonated acid in dilution; and from about 0.8 to about 35 wt-% of a sparingly soluble organic solvent in dilution; wherein the composition has a pH of less than about 7 and has sanitizing efficacy against gram positive and gram negative bacteria.

11. The method of claim 10 , wherein the biofilm is reduced by at least three log CFU/cm 2 after ten minutes of exposure to the composition.

12. The method of claim 10 further comprising a soluble organic solvent, wherein the anionic surfactant is selected from the group consisting of C 8 -C 22 alkyl sulfonate, linear alkyl benzene sulfonic acid, diphenylated sulfonates, sulfonated oleic acid, and mixtures thereof, and wherein the sparingly soluble organic solvent is selected from the group consisting of diethylene glycol n-butyl ether, diethylene glycol n-propyl ether, diethylene glycol ethyl ether, diethylene glycol methyl ether, diethylene glycol t-butyl ether, dipropylene glycol n-butyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol propyl ether, dipropylene glycol tert-butyl ether, ethylene glycol butyl ether, ethylene glycol propyl ether, ethylene glycol ethyl ether, ethylene glycol methyl ether, ethylene glycol methyl ether acetate, propylene glycol n-butyl ether, propylene glycol ethyl ether, propylene glycol methyl ether, propylene glycol n-propyl ether, tripropylene glycol methyl ether and tripropylene glycol n-butyl ether, ethylene glycol phenyl ether, propylene glycol phenyl ether and mixtures thereof.

13. The method of claim 10 wherein the composition is diluted with water, wherein the dilution is between about 5 parts water per 1 part concentrated composition and about 128 parts water per 1 part concentrated composition and wherein said pH is less than about 7.

14. The method of claim 10 wherein the composition is diluted with water, wherein the dilution is between about 8 parts water per 1 part concentrated composition and about 64 parts water per 1 part concentrated composition and wherein said pH is less than about 7.

15. The method of claim 10 wherein the composition is diluted with water, wherein the dilution is between about 16 parts water per 1 part concentrated composition and about 64 parts water per 1 part concentrated composition and wherein said pH is less than about 4.

16. The method of claim 10 wherein the composition is diluted with water, wherein the dilution is less than about 32 parts water per 1 part concentrated composition and wherein said pH is less than about 4.

17. The method of claim 10 wherein the sparingly soluble and soluble organic solvents are dipropylene glycol methyl ether and propylene glycol phenyl ether.

18. The method of claim 10 , wherein the composition further comprising between about 0.01 and about 35 wt-% of an oxidizing agent, wherein the oxidizing agent comprises hydrogen peroxide having an active concentration of 70% or greater, and wherein the composition does not contain a peroxycarboxylic acid or a halogen.

Assignees

• Ecolab Usa Inc

Inventors

• Griese Gregory G
• Levitt Mark
• Staub Richard K
• Gilbreth Stefanie

Classifications

• A01N41/04 Primary

  Sulfonic acids; Derivatives thereof · CPC title

• A01N25/02

  containing liquids as carriers, diluents or solvents · CPC title