Textile bleaching and disinfecting using the mixture of hydrophilic and hydrophobic peroxycarboxylic acid composition

Patent metadata

Field	Value
Publication number	US-12104144-B2
Application number	US-202318330094-A
Country	US
Kind code	B2
Filing date	Jun 6, 2023
Priority date	Jun 17, 2019
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

Liquid peroxycarboxylic acid laundry compositions, namely bleaching and disinfecting compositions combining mixed peroxycarboxylic acids to provide synergistic efficacy are disclosed. Methods of using the liquid peroxycarboxylic acid laundry compositions for low temperatures and a use pH with detergent and water from about 6 to about 10 are also disclosed. Beneficially, the liquid peroxycarboxylic acid laundry compositions and methods of using the same do not include sulfonated peroxycarboxylic acids and sulfonated carboxylic acid, such as peroxy sulfonated oleic acid/sulfonated oleic acid (PSOA/SOA).

First claim

What is claimed is:

1. A method of bleaching and disinfecting laundry articles comprising:
forming a mixed peroxycarboxylic acid bleaching and disinfectant composition that is free of peroxy sulfonated oleic acid (PSOA) and sulfonated oleic acid (SOA);
contacting a soiled article or surface with the composition in a laundry machine at a temperature between about 25° C. and about 50° ° C. and a use pH of at least about 6;
disinfecting the article or surface;
bleaching the article or surface; and
draining and/or rinsing the composition from the laundry machine;
wherein the composition comprises:
from about 0.1 wt-% to about 40 wt-% of a hydrophilic C 1 -C 4 peroxycarboxylic acid;
from about 0.01 wt-% to about 20 wt-% of a hydrophobic C 5 -C 22 peroxycarboxylic acid;
a C 1 -C 4 carboxylic acid;
a C 5 -C 22 carboxylic acid;
an oxidizing agent;
from about 0.01 wt-% to about 10 wt-% of a stabilizing agent, wherein the stabilizing agent is dipicolinic acid;
a peroxycarboxylic acid-stable surfactant coupler having a critical micelle concentration of between 0.1 g/L to about 10 g/L, wherein the coupler is an anionic surfactant; and
at least one additional agent.

2. The method of claim 1 , wherein the composition is diluted with a solvent and/or a detergent to form a use solution.

3. The method of claim 1 , wherein the pH of the composition is between about 6 and about 10, and the use pH is from about 7 to about 9.

4. The method of claim 1 , wherein the temperature of the contacting is between about 25° C. and about 40° C.

5. The method of claim 1 , wherein the C 1 -C 4 peroxycarboxylic acid and C 5 -C 22 peroxycarboxylic acid are present in a ratio of between about 4:1 to about 8:1.

6. The method of claim 1 , wherein the contacting is for a period of about 1 minute to about 60 minutes.

7. The method of claim 1 , wherein the composition provides at least substantially similar bleaching and disinfecting efficacy to peracid composition containing PSOA/SOA with or without additional peroxycarboxylic acids.

8. The method of claim 1 , where the composition does not impart residues on the article or surface and/or where the composition residues on the article or surface in comparison to a laundry composition that includes a hydrotrope coupler instead of the peroxycarboxylic acid-stable surfactant coupler.

9. The method of claim 1 , wherein the compositions decreases residues on the article or surface in comparison to a laundry composition that further includes a hydrotrope coupler instead of the peroxycarboxylic acid-stable surfactant coupler.

10. An equilibrium laundry bleaching and disinfectant peroxycarboxylic acid composition free of peroxy sulfonated oleic acid (PSOA) and sulfonated oleic acid (SOA) comprising:
from about 1 wt-% to about 20 wt-% peroxyacetic acid;
from about 0.5 wt-% to about 5 wt-% peroxyoctanoic acid;
from about 15 wt-% to about 40 wt-% of a carboxylic acid, wherein the carboxylic acid is a combination of acetic acid and octanoic acid;
from about 1 wt-% to about 5 wt-% of a C 14 -C 16 secondary alkane sulfonate surfactant coupler having a critical micelle concentration between about 0.1 g/L to about 10 g/L;
an oxidizing agent;
up to about 10 wt-% a stabilizing agent, wherein the stabilizing agent is dipicolinic acid; and
at least one additional agent.

11. The composition of claim 10 , wherein the at least one additional agent comprises a stabilizing agent, a solvent, an additional surfactant, or combinations thereof.

12. The composition of claim 10 , wherein the pH of the use solution diluted from the composition is between about 6 and about 10.

13. The composition of claim 10 , wherein the peroxyacetic acid and peroxyoctanoic acid are present in a ratio of between about 4:1 to about 8:1, or about 6:1.

14. The composition of claim 10 , wherein the surfactant coupler comprises from about 1 wt-% to about 5 wt-% on an active basis of the composition.

15. The composition of claim 10 , further comprising an organic acid.

16. The composition of claim 10 , further comprising a mineral acid.

Assignees

• Ecolab Usa Inc

Inventors

• Li Junzhong
• Prideaux Allison
• Dotzauer David
• Fast Jonathan P
• Staub Richard

Classifications

• C11D2111/12

  Soft surfaces, e.g. textile · CPC title

• C11D3/3956

  Liquid compositions · CPC title

• C11D3/3955

  Organic bleaching agents (C11D3/3951 takes precedence) · CPC title

• C11D1/143

  Sulfonic acid esters · CPC title

• C11D1/37

  Mixtures of compounds all of which are anionic · CPC title