Polymeric and solid-supported chelators for stabilization of peracid-containing compositions

Patent metadata

Field	Value
Publication number	US-12096768-B2
Application number	US-202016947585-A
Country	US
Kind code	B2
Filing date	Aug 7, 2020
Priority date	Aug 7, 2019
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

Stabilized peroxycarboxylic acid compositions and the solid supported peracid stabilizers are provided. Methods of producing the solid supported peracid stabilizers are provided. The solid supported peracid stabilizers and the stable peroxycarboxylic acid compositions are particularly suitable for use in sanitizing equipment and surfaces to reduce yeasts, spores and bacteria, including those having contact with food, food products and/or components thereof, which require or benefit from infection control suitable for direct contact with such food sources.

First claim

What is claimed is:

1. A method of stabilizing a peroxycarboxylic acid composition comprising:
esterifying an acid comprising chelidamic acid to generate a dimethyl ester of chelidamic acid;
contacting the dimethyl ester of chelidamic acid with a resin material comprising poly(styrene-co-vinylbenzylchloride-co-divinylbenzene) in an alkylation reaction between one or more chlormethyl groups on the resin and the dimethyl ester of chelidamic acid to generate a functionalized resin;
hydrolyzing the functionalized resin to generate a dipicolinic acid-functionalized resin comprising one or more carboxylic acid groups; and
providing the dipicolinic acid-functionalized resin to a peroxycarboxylic acid composition in need of stabilization;
wherein the peroxycarboxylic acid composition comprises a C 1 -C 22 carboxylic acid, a C 1 -C 22 percarboxylic acid, hydrogen peroxide, and water, and
wherein the peroxycarboxylic acid composition retains at least about 80% of the peroxycarboxylic acid after 30 days storage at a temperature of at least 40° C. and up to 70° ° C.

2. The method of claim 1 , wherein the resin material is crosslinked.

3. The method of claim 1 , wherein the peroxycarboxylic acid composition comprises from about 1 wt-% to about 80 wt-% of the C 1 -C 22 carboxylic acid.

4. The method of claim 1 , wherein the peroxycarboxylic acid composition comprises from about 1 wt-% to about 80 wt-% of the hydrogen peroxide.

5. The method of claim 1 , wherein the peroxycarboxylic acid composition comprises from about 0.1 wt-% to about 1 wt-% of the dipicolinic acid-functionalized resin.

6. The method of claim 1 , wherein the peroxycarboxylic acid composition retains at least about 85% of peroxycarboxylic acid after 30 days storage at a temperature of at least 40° C. and up to 70° C.

7. The method of claim 1 , wherein the dipicolinic acid-functionalized resin is added into a container of the peroxycarboxylic acid composition or applied as a coating to a surface of a container in contact with the peroxycarboxylic acid composition, and wherein the container houses the peroxycarboxylic acid composition during storage and/or transport.

8. A stabilized peroxycarboxylic acid composition comprising the dipicolinic acid-functionalized resin and peroxycarboxylic acid composition prepared in claim 1 .

9. The composition of claim 8 , wherein the composition comprises from about 1 wt-% to about 80 wt-% of the C 1 -C 22 carboxylic acid.

10. The composition of claim 8 , wherein the composition comprises from about 1 wt-% to about 80 wt-% of the hydrogen peroxide.

11. The composition of claim 8 , wherein the composition comprises from about 0.1 wt-% to about 1 wt-% of the dipicolinic acid-functionalized resin.

12. The composition of claim 8 , further comprising at least one additional agent comprising a surfactant, a hydrotrope, a defoaming agent, a solvent, a mineral acid, or a combination thereof.

Assignees

• Ecolab Usa Inc

Inventors

• Dhawan Ashish
• Li Junzhong
• Mcsherry David D
• Silvernail Carter M
• Nagel Chris

Classifications

• C08F8/30

  Introducing nitrogen atoms or nitrogen-containing groups · CPC title

• C07C407/006

  Stabilisation; Use of additives · CPC title

• A01N59/00

  Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds · CPC title

• A01N37/16 Primary

  containing the group [IMAGE cpc-sch-A01N-0934.gif]; Thio analogues thereof · CPC title

• Y02A40/22

  Improving land use; Improving water use or availability; Controlling erosion · CPC title