# US 10,499,649 B2 · Coated, antimicrobial, chemically strengthened glass and method of making

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- Number: US 10,499,649 B2
- Document ID: US10499649B2
- Status: Granted
- Kind: B2
- Application number: 15/444,615
- Filed: 2017-02-28
- Published: 2017-06-15
- Granted: 2019-12-10
- Earliest claimed: 2010-08-06
- Assignees: Corning Incorporated
- Applicants: Corning Incorporated
- Inventors: Nicholas Francis Borrelli; David Lathrop Morse; Wageesha Senaratne; Florence Christine Monique Verrier; Ying Wei
- Web page: https://patentgrep.com/patent/US10499649B2

## CPC

- A01N 59/16: Heavy metals; Compounds thereof
- A01N 25/08: containing solids as carriers or diluents
- C03C 3/083: containing aluminium oxide or an iron compound
- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- C03C 3/091: containing aluminium
- C03C 3/093: containing zinc or zirconium
- C03C 3/095: containing rare earths
- C03C 4/00: Compositions for glass with special properties
- C03C 17/30: with silicon-containing compounds
- C03C 21/002: {to perform ion-exchange between alkali ions (C03C21/005 takes precedence)}
- C03C 21/005: {to introduce in the glass such metals or metallic ions as Ag, Cu}
- C03C 2204/02: Antibacterial glass, glaze or enamel
- C03C 2204/04: Opaque glass, glaze or enamel
- C03C 2217/76: Hydrophobic and oleophobic coatings
- Y10T 428/24926: including ceramic, glass, porcelain or quartz layer
- Y10T 428/265: 1 mil or less
- Y10T 428/27: Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
- Y10T 428/273: of coating
- Y10T 428/315: Surface modified glass [e.g., tempered, strengthened, etc.]
- Y10T 428/31612: As silicone, silane or siloxane
- 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
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The disclosure is directed to a chemically strengthened glass having antimicrobial properties and to a method of making such glass. In particular, the disclosure is directed to a chemically strengthened glass with antimicrobial properties and with a low surface energy coating on the glass that does not interfere with the antimicrobial properties of the glass. The antimicrobial has an Ag ion concentration on the surface in the range of greater than zero to 0.047 μg/cm2. The glass has particular applications as antimicrobial shelving, table tops and other applications in hospitals, laboratories and other institutions handling biological substances, where color in the glass is not a consideration.

## Claims

### Claim 1

An antimicrobial glass, comprising:
a glass article having a surface; and
an antimicrobial Ag+ region extending from the surface of the glass article to a depth of region in the glass article, the antimicrobial Ag+ region having a plurality of Ag+1 ions,
wherein the concentration of the plurality of Ag+1 ions within 20 nm from the surface of the glass article is in the range of greater than or equal to 0.015 μg/cm2 to less than or equal to 0.08 μg/cm2 as measured by x-ray photoluminescence spectroscopy (XPS) or electron microprobe (EMP) analytical techniques, and
further wherein the antimicrobial glass has a strength of at least 360 MPa based on a Ring on Ring test conducted after abrasion of the surface.

### Claim 2 (depends on 1)

The antimicrobial glass according to claim 1, wherein the antimicrobial glass has an average strength of about 400 MPa based on a set of Ring on Ring tests conducted after abrasion of the surface.

### Claim 3 (depends on 1)

The antimicrobial glass according to claim 1, wherein the depth of region is up to about 20 μm.

### Claim 4 (depends on 1)

The antimicrobial glass according to claim 1, wherein the concentration of the plurality of Ag+1 ions within 20 nm from the surface of the glass article is in the range of greater than or equal to 0.015 μg/cm2to less than or equal to 0.05 μg/cm2.

### Claim 5 (depends on 1)

The antimicrobial glass according to claim 1, further comprising a hydrophobic coating having a thickness in the range from about 0.5 nm to about 20 nm.

### Claim 6 (depends on 1)

The antimicrobial glass according to claim 1, wherein the antimicrobial glass is colorless.

### Claim 7 (depends on 1)

The antimicrobial glass according to claim 1, wherein the composition of the glass article is selected from the group consisting of soda lime glass, alkali aluminosilicate glass and alkali aluminoborosilicate glass.

### Claim 8

An antimicrobial glass, comprising:
a glass article having a surface;
an ion exchange-derived, antimicrobial Ag+ region extending from the surface of the glass article to a depth of region in the glass article, the antimicrobial Ag+ region having a plurality of Ag+1 ions; and
an ion exchange-derived, compressive stress layer extending from the surface of the glass article to a second depth in the glass article,
wherein the concentration of the plurality of Ag+1 ions within 20 nm from the surface of the glass article is in the range of greater than or equal to 0.015 μg/cm2 to less than or equal to 0.08 μg/cm2 as measured by x-ray photoluminescence spectroscopy (XPS) or electron microprobe (EMP) analytical techniques, and
further wherein the antimicrobial glass has a strength of at least 360 MPa based on a Ring on Ring test conducted after abrasion of the surface.

### Claim 9 (depends on 8)

The antimicrobial glass according to claim 8, wherein the depth of region is up to about 20 μm.

### Claim 10 (depends on 8)

The antimicrobial glass according to claim 8, wherein the concentration of the plurality of Ag+1 ions within 20 nm from the surface of the glass article is in the range of greater than or equal to 0.015 μg/cm2 to less than or equal to 0.05 μg/cm2.

### Claim 11 (depends on 8)

The antimicrobial glass according to claim 8, further comprising a hydrophobic coating having a thickness in the range from about 0.5 nm to about 20 nm.

### Claim 12 (depends on 8)

The antimicrobial glass according to claim 8, wherein the antimicrobial glass is colorless.

### Claim 13 (depends on 8)

The antimicrobial glass according to claim 8, wherein the composition of the glass article is selected from the group consisting of soda lime glass, alkali aluminosilicate glass and alkali aluminoborosilicate glass.

### Claim 14

An antimicrobial glass, comprising:
a glass article having a surface;
an ion exchange-derived, antimicrobial Ag+ region extending from the surface of the glass article to a depth of region in the glass article, the antimicrobial Ag+ region having a plurality of Ag+1 ions;
an ion exchange-derived, compressive stress layer extending from the surface of the glass article to a second depth in the glass article; and
a low surface energy coating on the surface of the glass article that allows water molecules to contact the antimicrobial Ag+ region,
wherein the concentration of the plurality of Ag+1 ions within 20 nm from the surface of the glass article is in the range of greater than or equal to 0.015 μg/cm2 to less than or equal to 0.08 μg/cm2 as measured by x-ray photoluminescence spectroscopy (XPS) or electron microprobe (EMP) analytical techniques, and
further wherein the antimicrobial glass has a strength of at least 360 MPa based on a Ring on Ring test conducted after abrasion of the surface.

### Claim 15 (depends on 14)

The antimicrobial glass according to claim 14, wherein the coating has a thickness in the range from about 0.5 nm to about 20 nm.

### Claim 16 (depends on 14)

The antimicrobial glass according to claim 14, wherein the depth of region is up to about 20 μm.

### Claim 17 (depends on 14)

The antimicrobial glass according to claim 14, wherein the concentration of the plurality of Ag+1 ions within 20 nm from the surface of the glass article is in the range of greater than or equal to 0.015 μg/cm2to less than or equal to 0.05 μg/cm2.

### Claim 18 (depends on 14)

The antimicrobial glass according to claim 14, wherein the antimicrobial glass is colorless.

### Claim 19 (depends on 14)

The antimicrobial glass according to claim 14, wherein the composition of the glass article is selected from the group consisting of soda lime glass, alkali aluminosilicate glass and alkali aluminoborosilicate glass.

### Claim 20 (depends on 8)

The antimicrobial glass according to claim 8, wherein the glass article exhibits a light transmission, uncorrected for reflection losses, of at least 88% over the wavelength range of 400 nm to 750 nm, and further wherein the ratio of the light transmission at 428 nm and 650 nm is at least 99%.