Antimicrobial gas releasing agents and systems and methods for using the same

Patent metadata

Field	Value
Publication number	US-11224219-B2
Application number	US-201916652476-A
Country	US
Kind code	B2
Filing date	Nov 12, 2019
Priority date	Nov 13, 2018
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

Disclosed are antimicrobial releasing agents, methods of preparing the antimicrobial releasing agents, and entrained polymers containing antimicrobial releasing agents. The antimicrobial releasing agent is prepared with an acidified hydrophilic material with a pH below 3.5 as a carrier, an active compound, and a trigger. The entrained polymer of the invention releases an antimicrobial agent in gas form, such as ClO2, optionally over a range of concentration from 150 ppm to 1800 ppm per gram of the entrained polymer under certain tested conditions.

First claim

What is claimed is:

1. An antimicrobial releasing agent comprising:
i. a carrier material comprising an acidified silica gel, wherein the carrier material has a pH of from 1.4 to 3.1 and is 50 to 90% by weight with respect to the total weight of the antimicrobial releasing agent;
ii. an active compound comprising a sodium chlorite, wherein the active compound is 5 to 30% by weight with respect to the total weight of the antimicrobial releasing agent; and
iii. a trigger comprising calcium chloride, wherein the trigger is 2 to 20% by weight with respect to the total weight of the antimicrobial releasing agent.

2. The antimicrobial releasing agent of claim 1 , wherein the carrier material has been treated with one or more acids and is a dry solid when part of the antimicrobial releasing agent.

3. The antimicrobial releasing agent of claim 1 , wherein the carrier material is a hydrophilic material.

4. The antimicrobial releasing agent of claim 1 , wherein the carrier material has a pH of no more than 2.5.

5. A method of preparing an antimicrobial releasing agent of claim 1 , the method comprising the steps of:
i. providing a carrier material comprising an acidified silica gel; and
ii. mixing the carrier material with a trigger and an active compound, wherein the trigger comprises a calcium chloride and the active compound comprises sodium chlorite, wherein the method generates the antimicrobial releasing agent.

6. The method of claim 5 , wherein the carrier material is provided by treating the silica gel with a mineral acid followed by drying.

Assignees

• Csp Technologies Inc

Inventors

• Pratt Jason
• Freedman Jonathan R
• Gupta Deepti S
• Johnston Michael A
• Belfance John
• Spano William Frederick

Classifications

• B65D81/28

  Applications of food preservatives, fungicides, pesticides or animal repellants · CPC title

• B65D81/24

  Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants (with thermal insulation B65D81/38) · CPC title

• B65D65/38

  Packaging materials of special type or form · CPC title

• A01N59/08

  Alkali metal chlorides; Alkaline earth metal chlorides · CPC title

• A01N59/00

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