# US 10,501,644 B2 · Reactive surface coating having chemical decontamination and biocidal properties

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,501,644 B2
- Document ID: US10501644B2
- Status: Granted
- Kind: B2
- Application number: 16/009,745
- Filed: 2018-06-15
- Published: 2018-10-11
- Granted: 2019-12-10
- Earliest claimed: 2013-03-15
- Assignees: American Sterilizer Company
- Applicants: American Sterilizer Company
- Inventors: Herbert J. Kaiser; Miranda C. Shaver; Timothy Lee Giddens
- Web page: https://patentgrep.com/patent/US10501644B2

## CPC

- C09D 5/14: Paints containing biocides, e.g. fungicides, insecticides or pesticides (C09D5/16 takes precedence)
- A01N 59/00: Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N 59/06: Aluminium; Calcium; Magnesium; Compounds thereof
- A62D 5/00: Composition of materials for coverings or clothing affording protection against harmful chemical agents
- B05D 1/02: performed by spraying
- B05D 1/28: performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
- B05D 3/007: {After-treatment}
- C09D 139/06: Homopolymers or copolymers of N-vinyl-pyrrolidones
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- 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
- A62D: CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)

## Abstract

Reactive compositions are provided, having biocidal and chemical decontamination/neutralization properties, comprising a hygroscopic polymer and an active, which are useful in a variety of commercial, healthcare and military applications and a wide variety of contaminants, including without limitation chemical and biological warfare agents. The reactive compositions are renewable or rechargeable after use by exposure to an additional application of the active and do not require removal, disposal or replacement of the originally applied composition. Methods for preparing and applying the reactive compositions are disclosed.

## Claims

### Claim 1

A method for providing a renewable reactive film coating, having biocidal and chemical decontamination properties against biological and chemical warfare agents, to a surface of an object or article, consisting of the steps of:
a. applying a hygroscopic polymer solution to the surface of the object or article, wherein the polymer consists of non-cross-linked, water soluble polyvinylpyrrolidone, dissolved in (i) water or (ii) water and methanol to form a solution, wherein the polyvinylpyrrolidone has a molecular weight of 10K, 58K, 360K or 1300K and is present in an amount ranging from about 1 to about 10 wt. %, based on the total weight of the renewable reactive film coating;
b. processing the polymer solution to form a film;
c. exposing the film to an initial charge of an oxidant consisting of hydrogen peroxide, wherein the hydrogen peroxide is provided as: i) an aqueous solution of hydrogen peroxide present in an amount ranging from about 10-20 wt. %, or ii) vaporized hydrogen peroxide of at least about 400 ppm of vaporized hydrogen peroxide for a time of about 30 minutes;
d. air drying the film, and
e. renewing the biocidal and chemical decontamination properties of the film, after fouling, or exhaustion or decay of the hydrogen peroxide active due to contact with biological or chemical warfare agents, by exposing the film to additional vaporized hydrogen peroxide.

### Claim 2

A method of providing a renewable reactive film coating, having biocidal and chemical deactivation properties against biological and chemical warfare agents, to the surface of an object or article, consisting of the steps of:
a. providing a solution consisting of i) a non-cross-linked, water soluble polyvinylpyrrolidone dissolved in water, or ii) a non-crosslinked, water soluble polyvinylpyrrolidone dissolved in water and methanol, wherein the polyvinylpyrrolidone has a molecular weight of 10K, 58K, 360K or 1300K and is present in an amount ranging from about 1 to about 10 wt. %, based on the total weight of the renewable reactive film coating;
b. mixing the polyvinylpyrrolidone solution with an active consisting of aqueous solution of hydrogen peroxide to form a mixture, wherein the aqueous hydrogen peroxide solution is a 10 wt. % or 20 wt. % solution;
c. applying the mixture to the surface of the object or article;
d. drying the mixture in air to form a film; and,
e. renewing the biocidal and chemical decontamination properties of the film, after fouling, or exhaustion or decay of the hydrogen peroxide active due to contact with biological or chemical warfare agents, by exposing the film to vaporized hydrogen peroxide of at least about 400 ppm for at least 30 minutes.

### Claim 3

A method of providing a renewable reactive film coating, having biocidal and chemical deactivation properties against biological and chemical warfare agents, to the surface of an object or article, consisting of the steps of:
a. providing a solution consisting of i) a non-cross-linked, water soluble polyvinylpyrrolidone dissolved in water, or ii) a non-crosslinked, water soluble polyvinylpyrrolidone dissolved in water and methanol, wherein the polyvinylpyrrolidone has a molecular weight of 10K, 58K, 360K or 1300K and is present in an amount ranging from about 1 to about 10 wt. %, based on the total weight of the renewable reactive film coating;
b. mixing the polyvinylpyrrolidone solution with an active consisting of peracetic acid or iodine to form a mixture, wherein the active is present in an amount ranging from about 1 to about 10 wt. %, based on the total weight of the renewable reactive film coating;
c. applying the mixture to the surface of the object or article;
d. drying the mixture in air to form a film; and,
e. renewing the biocidal and chemical decontamination properties of the film, after fouling, or exhaustion or decay of the active due to contact with biological or chemical warfare agents, by exposing the film to additional amounts of the active.

### Claim 4

A method for providing a renewable reactive film coating, having biocidal and chemical decontamination properties against biological and chemical warfare agents, to a surface of an object or article, consisting of the steps of:
a. applying a hygroscopic polymer solution to the surface of the object or article,
wherein the polymer consists of non-cross-linked, water soluble polyvinylpyrrolidone, dissolved in (i) water or (ii) water and methanol to form a solution, wherein the polyvinylpyrrolidone has a molecular weight of 10K, 58K, 360K or 1300K and is present in an amount ranging from about 1 to about 10 wt. %, based on the total weight of the renewable reactive film coating;
b. processing the polymer solution to form a film;
c. exposing the film to an initial charge of an active consisting of chlorine gas;
d. air drying the film; and
e. renewing the biocidal and chemical decontamination properties of the film, after fouling, or exhaustion or decay of the active due to contact with biological or chemical warfare agents, by exposing the film to additional amounts of chlorine gas.