# US 10,370,543 B2 · High quality antimicrobial paint composition

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- Number: US 10,370,543 B2
- Document ID: US10370543B2
- Status: Granted
- Kind: B2
- Application number: 15/071,385
- Filed: 2016-03-16
- Published: 2016-07-07
- Granted: 2019-08-06
- Earliest claimed: 2011-09-30
- Assignees: The Sherwin-Williams Company
- Applicants: The Sherwin-Williams Company
- Inventors: Kathleen R Gisser; Morgan S Sibbald; Wanda J Smith; Janice K. Dreshar; Donald A. Prochazka
- Web page: https://patentgrep.com/patent/US10370543B2

## CPC

- C09D 5/14: Paints containing biocides, e.g. fungicides, insecticides or pesticides (C09D5/16 takes precedence)
- A01N 25/28: Microcapsules {or nanocapsules}
- A01N 33/12: Quaternary ammonium compounds
- C08K 5/17: Amines; Quaternary ammonium compounds
- C09D 5/1625: {organic}
- C09D 7/69: {Particle size larger than 1000 nm}
- 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
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A high quality paint formulation comprises water, latex polymer, pigment, and a quaternary ammonium compound. The high quality paint is capable of killing gram positive bacteria, gram negative bacteria at a rate of greater than 3 logs within 2 hours of application of bacteria to a painted surface. The high quality paint is also capable of inactivating viruses.

## Claims

### Claim 1

A latex paint composition comprising:
(a) a binder copolymer comprising an acrylic component and a second polymeric component comprising one or more of a vinyl component and styrene component and having a compatibility score of 0.5 or less;
(b) from about 0.25% by weight to about 3.0% by weight of a quaternary ammonium compound;
(c) a hiding pigment; and
(d) water,
wherein the paint composition has a pigment volume concentration (PVC) of about 5 to about 60;
wherein the quaternary ammonium compound is present in a suitable amount to provide one or more of (1) gram negative bacterial reduction by greater than 3 logs within 2 hours of application of the gram negative bacteria to a dried surface of the paint composition; (2) gram positive bacterial reduction by greater than 3 logs within 2 hours of application of the gram positive bacteria to a dried surface of the paint composition; or (3) viral reduction by greater than 3 logs within 2 hours of application of the virus to a dried surface of the paint composition, wherein the paint composition has a dried paint film gloss of 5 to 85 gloss units measured at 60°.

### Claim 2 (depends on 1)

The latex paint composition of claim 1, wherein the hiding pigment comprises one or more of calcium carbonate, talc, clay, silicates, aluminum silicates, calcium metasilicates, aluminum potassium silicates, magnesium silicates, barium sulfates, nepheline syenite, feldspar, zinc oxides, sulfides, titanium dioxide, or mixtures thereof.

### Claim 3 (depends on 1)

The latex paint composition of claim 1 further comprising at least one additional pigment other than titanium dioxide in an amount up to about 30% by weight.

### Claim 4 (depends on 1)

The latex paint composition of claim 1, wherein the paint composition is substantially free of an intumescent ingredient.

### Claim 5 (depends on 1)

The latex paint composition of claim 1, wherein the paint composition has about 30% to about 60% by weight solids.

### Claim 6 (depends on 1)

The latex paint composition of claim 1 further comprising a biocide, said biocide comprising at least one of a metal ion containing compounds, a polymeric biocides, a heterocyclic compounds, a phenols, an organometallics, an aldehydes, a proteins, a peroxygen, an alcohols, an enzymes, a polypeptides, or a halogen releasing compounds.

### Claim 7 (depends on 1)

The latex paint composition of claim 1, wherein the quaternary ammonium compound is substantially free of silicon.

### Claim 8 (depends on 1)

The latex paint composition of claim 1, wherein the quaternary ammonium compound has the structural formula:
wherein R1 and R2 are linear or branched chain alkyl groups or mixtures of groups having 1-7 carbons, R3 is a linear or branched chain alkyl group or a mixture of groups containing 6-20 carbons, and R4 is a linear or branched chain alkyl group or a mixture of groups having 6-20 carbons, benzyl or alkyl benzyl groups, or
where R3 and R4 may be the same or different from each other, and X represents a halide, carbonate, methosulfate, or saccharinate.

### Claim 9 (depends on 1)

The latex paint composition of claim 1, wherein the quaternary ammonium compound has the structural formula:
where R1 is C8-C18-alkenyl or -alkenyl, where R2 is C8-C18-alkyl or -alkenyl, aryl or C7-C18-aralkyl, in which the aromatic rings can additionally be substituted, where R3 is C1-C4-alkyl, where R4 is H or methyl, and where A is an anion of an organic or inorganic acid.

### Claim 10 (depends on 1)

The latex paint composition of claim 1, wherein the quaternary ammonium compound comprises one or more of n-alkyl dimethyl benzyl ammonium chlorides, the n-alkyl being a C8-C18 alkyl, benzalkonium chloride, the alkyl side chain being C8, C10, C12, C14, C16 or C18 or mixtures thereof, n-alkyl dimethyl ethylbenzyl ammonium chlorides, the n-alkyl being a C8-C18 alkyl, dialkyl dimethyl ammonium chlorides, the alkyl side chain being C6-C12, n-alkyl dimethyl benzyl ammonium chloride, and dodecyl dimethyl ammonium chloride, octyl decyl dimethyl ammonium chloride, dioctyl dimethyl ammonium chloride, didecyl dimethyl ammonium chloride, or mixtures thereof.

### Claim 11 (depends on 1)

The latex paint composition of claim 1, wherein the quaternary ammonium compound is in a microcapsule.

### Claim 12 (depends on 1)

The latex paint composition of claim 1, wherein the binder polymer is present at about 7% to about 30% by weight.

### Claim 13 (depends on 1)

The latex paint composition of claim 1, wherein the pigment has a minimum fineness of grind by Hegman gauge of at least 4.

### Claim 14 (depends on 1)

The latex paint composition of claim 1, wherein the pigment has a minimum fineness of grind by Hegman gauge of at least 5.

### Claim 15 (depends on 1)

The latex paint composition of claim 1, the paint composition further comprising a pigment dispersing agent.

### Claim 16 (depends on 15)

The latex paint composition of claim 15, wherein the pigment dispersing agent comprises one or more of a solvent or surfactant.

### Claim 17 (depends on 15)

The latex paint composition of claim 15, wherein the pigment dispersing agent is present at lower than about 0.5% by weight.

### Claim 18 (depends on 1)

The latex paint composition of claim 1, wherein the quaternary ammonium compound is present in a suitable amount to provide reduction of E. Coli ATCC 11229 by greater than 3 logs within 2 hours of application of the bacteria to a dried surface of the paint composition, wherein the quaternary ammonium compound-comprises one or more of n-alkyl dimethyl benzyl ammonium chlorides, the n-alkyl being a C8-C18 alkyl, benzalkonium chloride, the alkyl side chain-being C8, C10, C12, C14, C16 or C18 or mixtures thereof, n-alkyl dimethyl ethylbenzyl ammonium chlorides, the n-alkyl being a C8-C18 alkyl, dialkyl dimethyl ammonium chlorides, the alkyl side chain being C6-C12, n-alkyl dimethyl benzyl ammonium chloride, and dodecyl dimethyl ammonium chloride, octyl decyl dimethyl ammonium chloride, dioctyl dimethyl ammonium chloride, didecyl dimethyl ammonium chloride, or mixtures thereof.

### Claim 19 (depends on 1)

The latex paint composition of claim 1 having a viscosity of under 120 KU.