# US 11,028,008 B2 · Fusion-formable automotive glass compositions, articles, and laminates

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- Number: US 11,028,008 B2
- Document ID: US11028008B2
- Status: Granted
- Kind: B2
- Application number: 15/817,958
- Filed: 2017-11-20
- Published: 2018-05-31
- Granted: 2021-06-08
- Earliest claimed: 2016-11-30
- Assignees: Corning Incorporated
- Applicants: Corning Incorporated
- Inventors: Timothy Michael Gross; Lisa Anne Tietz Moore
- Web page: https://patentgrep.com/patent/US11028008B2

## CPC

- C03C 3/097: containing phosphorus, niobium or tantalum
- B32B 17/06: comprising glass as the main or only constituent of a layer, next to another layer of a specific {material}
- B32B 17/10036: {comprising two outer glass sheets}
- B32B 17/10119: {having a composition deviating from the basic composition of soda-lime glass, e.g. borosilicate}
- B32B 17/10137: {Chemical strengthening}
- B32B 17/10743: {containing acrylate (co)polymers or salts thereof}
- B32B 17/10761: {containing vinyl acetal}
- B32B 17/1077: {containing polyurethane}
- B32B 17/10788: {containing ethylene vinylacetate}
- B60J 1/001: {Double glazing for vehicles}
- C03C 4/18: for ion-sensitive glass
- C03C 27/10: with the aid of adhesive specially adapted for that purpose
- B32B 2309/105: Thickness
- B32B 2605/006: Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
- C03B 17/064: {by the overflow downdraw fusion process; Isopipes therefor}
- C03C 21/002: {to perform ion-exchange between alkali ions (C03C21/005 takes precedence)}
- C03C 2204/00: Glasses, glazes or enamels with special properties
- 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
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B60J: WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES (fastening, suspending, closing, or opening of such devices E05)
- C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES

## Abstract

Embodiments of glass articles exhibiting a sag temperature in a range from about 600° C. to about 700° C. are disclosed. In one or more embodiments, the glass article includes a glass composition including SiO2 in an amount in a range from about 66 mol % to about 80 mol %, Al2O3 in an amount in a range from about 2 mol % to about 15 mol %, B2O3 in an amount in a range from about 0.9 mol % to about 15 mol %, P2O5 in a non-zero amount up to and including 7.5 mol %, Li2O in an amount from about 0.5 mol % to about 12 mol %, and Na2O in an amount from about 6 mol % to about 15 mol %. Laminates including the glass articles and methods for forming such laminates are also disclosed.

## Claims

### Claim 1

A glass article comprising a glass composition, the glass composition comprising:
SiO2 in an amount in a range from about 66 mol % to about 80 mol %;
Al2O3 in an amount in a range from about 2 mol % to about 16 mol %;
B2O3 in an amount in a range from about 0.9 mol % to about 15 mol %;
P2O5 in an amount from about 1 mol % to about 6 mol %;
Li2O in an amount from about 1 mol % to about 12 mol %; and
Na2O in an amount from about 6 mol % to about 15 mol %.

### Claim 2 (depends on 1)

The glass article of claim 1, wherein SiO2 is present in an amount from about 70 mol % to about 80 mol %, and Al2O3 is present in an amount from about 7 mol % to about 15 mol %.

### Claim 3 (depends on 1)

The glass article of claim 1, further comprising a total amount of SiO2, Al2O3, B2O3, and P2O5 greater than about 88 mol %.

### Claim 4 (depends on 1)

The glass article of claim 1, further comprising a compositional relationship (in mol %) of 0.9<(Al2O3+P2O5)/(Li2O+Na2O)<1.20.

### Claim 5 (depends on 1)

The glass article of claim 1, wherein the glass article is strengthened.

### Claim 6 (depends on 1)

The glass article of claim 1, wherein the glass article is fusion formed.

### Claim 7

A laminate comprising:
a first glass layer;
an interlayer disposed on the first glass layer; and
a second glass layer disposed on the interlayer opposite the first glass layer,
wherein either one or both the first glass layer and the second glass layer comprises a glass composition comprising:
SiO2 in an amount in a range from about 66 mol % to about 80 mol %;
Al2O3in an amount in a range from about 2 mol % to about 16 mol %;
B2O3 in an amount in a range from about 0.9 mol % to about 15 mol %;
P2O5 in an amount from about 1 mol % to about 6 mol %;
Li2O in an amount from about 1 mol % to about 12 mol %; and
Na2O in an amount from about 6 mol % to about 15 mol %.

### Claim 8 (depends on 7)

The laminate of claim 7, wherein either one or both the first glass layer and the second glass layer comprise a thickness less than about 1.6 mm.

### Claim 9 (depends on 7)

The laminate of claim 7, wherein the glass composition further comprises a compositional relationship (in mol %) of 0.9<(Al2O3+P2O5)/(Li2O+Na2O)<1.20.