# US 9,872,930 B2 · Synergistic disinfection enhancement

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- Number: US 9,872,930 B2
- Document ID: US9872930B2
- Status: Granted
- Kind: B2
- Application number: 15/699,336
- Filed: 2017-09-08
- Published: 2017-12-28
- Granted: 2018-01-23
- Earliest claimed: 2012-12-14
- Assignees: Saban Ventures Pty Limited
- Applicants: Saban Ventures Pty Limited
- Inventors: Vladimir Berentsveig; Dipika Patel
- Web page: https://patentgrep.com/patent/US9872930B2

## CPC

- A61L 2/186: Peroxide solutions
- A01N 37/16: containing the group [IMAGE cpc-sch-A01N-0934.gif]; Thio analogues thereof
- A01N 59/00: Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS

## Abstract

An aqueous disinfectant solution comprising peroxyacetic acid and a surfactant such as a polyoxyethylene alkyl ether phosphate, (polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether) or cocoamidopropylamino oxide. The solution is preferably adjusted to provide a pH in the range 5-8 by a pH adjusting agent such as a phosphate buffer; hydroxide; carbonate; bicarbonate; a combination of carbonate and hydroxide; or a combination of carbonate and bi carbonate.

## Claims

### Claim 1

An aqueous disinfectant solution comprising:
0.10 to 0.30 wt % peroxyacetic acid;
hydrogen peroxide;
acetic acid;
a surfactant; and
a buffer to provide a pH in the range 5-8;
wherein the buffer is a combination of carbonate and hydroxide; or a combination of carbonate and bicarbonate.

### Claim 2 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the solution is adjusted to provide a pH in the range 5.5-7.

### Claim 3 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the solution is adjusted to provide a pH in the range 6-7.

### Claim 4 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the solution is adjusted to provide a pH in the range 5.5-6.5.

### Claim 5 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the concentration of peroxyacetic acid is greater than 0.2 wt %.

### Claim 6 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the ratio of hydrogen peroxide:peroxyacetic acid is 5:1 or greater.

### Claim 7 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the ratio of hydrogen peroxide:peroxyacetic acid is 10:1 or greater.

### Claim 8 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the ratio of hydrogen peroxide:peroxyacetic acid is 15:1 or greater.

### Claim 9 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the ratio of hydrogen peroxide:peroxyacetic acid is 30:1 or greater.

### Claim 10 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the surfactant is a non-ionic surfactant.

### Claim 11 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the surfactant is selected from the group consisting of polyoxyethylene alkyl ether phosphates, (polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether) and cocoamidopropylamino oxide.

### Claim 12 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the surfactant is a polyoxyethylene alkyl ether phosphate.

### Claim 13 (depends on 1)

An aqueous disinfectant solution according to claim 1 wherein the surfactant is a phosphate ester based anionic surfactant.

### Claim 14 (depends on 1)

An aqueous disinfectant solution according to claim 1 including a corrosion inhibitor.

### Claim 15 (depends on 14)

An aqueous disinfectant solution according to claim 14 wherein the corrosion inhibitor is a benzotriazole.

### Claim 16 (depends on 1)

An aqueous disinfectant solution according to claim 1 including an antifoaming agent.

### Claim 17 (depends on 1)

A method of disinfection of an article comprising contacting an article with an aqueous disinfectant solution according to claim 1.

### Claim 18 (depends on 17)

A method according to claim 17 when carried out in a temperature range of 15-40° C.

### Claim 19 (depends on 17)

A method according to claim 17 when carried out in a temperature range of 20-35° C.

### Claim 20 (depends on 17)

A method according to claim 17 when carried out at ambient temperature.