# US 11,897,804 B2 · Uniformly pair sagged glass articles and hybrid laminates

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- Number: US 11,897,804 B2
- Document ID: US11897804B2
- Status: Granted
- Kind: B2
- Application number: 17/046,945
- Filed: 2019-04-12
- Published: 2021-05-27
- Granted: 2024-02-13
- Earliest claimed: 2018-04-13
- Assignees: Corning Incorporated
- Applicants: Corning Incorporated
- Inventors: Douglas Dale Bressler; Rebecca Marie Connors; Sinue Gomez; Timothy Michael Gross; Shane David Seyler; Jason Scott Stewart; Zhongzhi Tang; Lisa Anne Tietz Moore
- Web page: https://patentgrep.com/patent/US11897804B2

## CPC

- B32B 17/10036: {comprising two outer glass sheets}
- C03B 23/0252: {by gravity only, e.g. sagging (C03B23/035 takes precedence)}
- B32B 7/027: Thermal properties
- B32B 17/10119: {having a composition deviating from the basic composition of soda-lime glass, e.g. borosilicate}
- B32B 17/10137: {Chemical strengthening}
- B32B 17/1055: {characterized by the resin layer, i.e. interlayer}
- 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}
- B32B 17/10889: {shaping the sheets, e.g. by using a mould (B32B17/10816 takes precedence)}
- C03C 3/085: containing an oxide of a divalent metal
- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- C03C 3/091: containing aluminium
- C03C 3/097: containing phosphorus, niobium or tantalum
- C03C 27/10: with the aid of adhesive specially adapted for that purpose
- B32B 2605/08: Cars
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- 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

## Abstract

A laminate includes a first glass article having a first thickness, a first annealing point, and a first softening point, a second glass article having a second thickness, a second annealing point, and a second softening point, and an interlayer disposed between the first glass article and the second glass article. The first thickness is greater than the second thickness, the second annealing point is less than or equal to the first annealing point, and the second softening point is greater than the first softening point.

## Claims

### Claim 1

A laminate comprising:
a first glass article comprising a first thickness, a first annealing point (TA1), and a first softening point (TS1);
a second glass article comprising a second thickness, a second annealing point (TA2), and a second softening point (TS2); and
an interlayer disposed between the first glass article and the second glass article, wherein:
the first thickness is greater than the second thickness;
the second annealing point (TA2) is less than or equal to the first annealing point (TA1); and
the second softening point (TS2) is greater than the first softening point (TS1).

### Claim 2 (depends on 1)

The laminate of claim 1, wherein
T
A
⁢
1
+
T
S
⁢
1
2
≤
T
A
⁢
2
+
T
S
⁢
2
2
≤
(
T
A
⁢
1
+
T
S
⁢
1
2
+
50
⁢
°
⁢
⁢
C
.
)
.

### Claim 3 (depends on 1)

The laminate of claim 1, wherein:
the first glass article comprises a first sag depth;
the second glass article comprises a second sag depth; and
the first sag depth is within 5% of the second sag depth.

### Claim 4 (depends on 1)

The laminate of claim 1, wherein:
the first glass article comprises a first arcuate surface;
the second glass article comprises a second arcuate surface; and
the first arcuate surface and the second arcuate surface are shaped such that when the first glass article is stacked in contact with the second glass article a gap distance between the first glass article and the second glass article is about 1 mm or less.

### Claim 5 (depends on 1)

The laminate of claim 1, wherein a glass composition of the second glass article comprises:
SiO2 in an amount in a range from about 64 mol % to about 72 mol %;
Al2O3 in an amount in a range from about 8 mol % to about 13 mol %;
P2O5 in an amount in a range from about 1 mol % to about 3 mol %; and
MgO in an amount in a range from about 0 mol % to about 2 mol %.

### Claim 6 (depends on 5)

The laminate of claim 5, wherein the glass composition of the second glass article further comprises at least one of: Na2O in an amount in a range from about 4 mol % to about 8 mol %; K2O in an amount in a range from about 0 mol % to about 1.5 mol %; B2O3 in an amount in a range from about 7 mol % to about 10 mol %; Li2O in an amount in a range from about 3 mol % to about 6 mol %; or SnO2 in an amount in a range from about 0 mol % to about 0.25 mol %.

### Claim 7 (depends on 1)

The laminate of claim 1, wherein the glass composition of the second glass article comprises a total amount of alkali metal oxides in a range from about 5 mol % to about 20 mol %.

### Claim 8 (depends on 1)

The laminate of claim 1, wherein the second glass article comprises a viscosity at a liquidus temperature of the second glass article of about 50 kP or greater.

### Claim 9 (depends on 1)

The laminate of claim 1, wherein the second glass article comprises a viscosity at a liquidus temperature of the second glass article of about 500 kP or greater.

### Claim 10 (depends on 1)

The laminate of claim 1, wherein the first glass article comprises soda lime glass.

### Claim 11 (depends on 1)

The laminate of claim 1, wherein the second glass article comprises an alkali aluminosilicate glass, an alkali containing borosilicate glass, an alkali aluminophosphosilicate glass, or an alkali aluminoborosilicate glass.

### Claim 12 (depends on 1)

The laminate of claim 1, wherein the first thickness is from about 1 mm to about 3 mm.

### Claim 13 (depends on 1)

The laminate of claim 1, wherein the second thickness is from about 0.2 mm to about 1 mm.

### Claim 14 (depends on 1)

The laminate of claim 1, wherein the second glass article comprises a temperature at a viscosity of 35 kP of from about 1125° C. to about 1165° C.

### Claim 15 (depends on 1)

The laminate of claim 1, wherein the second glass article comprises a temperature at a viscosity of 100 kP of from about 1060° C. to about 1085° C.

### Claim 16 (depends on 1)

The laminate of claim 1, wherein the second glass article comprises a temperature at a viscosity of 200 kP of from about 1015° C. to about 1040° C.

### Claim 17 (depends on 1)

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

### Claim 18 (depends on 17)

The laminate of claim 17, wherein the second glass article is chemically strengthened.

### Claim 19 (depends on 1)

The laminate of claim 1, wherein:
the first annealing point is from about 535° C. to about 550° C.; and
the second annealing point is from about 520° C. to about 535° C.

### Claim 20 (depends on 1)

The laminate of claim 1, wherein:
the first glass article comprises a first strain point of from about 495° C. to about 505° C.; and
the second glass article comprises a second strain point of from about 470° C. to about 490° C.

### Claim 21 (depends on 1)

The laminate of claim 1, wherein:
the first softening point comprises from about 715° C. to about 735° C.; and
the second softening point comprises from about 770° C. to about 810° C.

### Claim 22 (depends on 1)

The laminate of claim 1, wherein:
the first glass article comprises a density of from about 2.4 g/cm3 to about 2.6 g/cm3; and
the second glass article comprises a density of from about 2.2 g/cm3 to about 2.4 g/cm3.

### Claim 23 (depends on 1)

The laminate of claim 1, wherein:
the first glass article comprises a CTE of from about 80×10−7° C. to about 90×10−7° C.; and
the second glass article comprises a CTE of from about 52×10−7° C. to about 65×10−7° C.

### Claim 24 (depends on 1)

The laminate of claim 1, wherein:
a difference in magnitude between the first annealing point and the first softening point is from about 180° C. to about 185° C.; and
a difference in magnitude between the second annealing point and the second softening point is from about 240° C. to about 280° C.

### Claim 25 (depends on 1)

The laminate of claim 1, wherein:
T
A
⁢
1
+
T
S
⁢
1
2
is from about 620° C. to about 640° C.; and
T
A
⁢
2
+
T
S
⁢
2
2
is from about 650° C. to about 670° C.

### Claim 26 (depends on 1)

The laminate of claim 1, wherein the first glass article comprises a d(log viscosity)/dT at 100 kP of from about −0.01 to about −0.02 and the second glass article comprises a d(log viscosity)/dT at 100 kP of from about −0.006 to about −0.009.

### Claim 27 (depends on 1)

The laminate of claim 1, wherein the interlayer comprises a polyvinyl butyral, an acoustic polyvinyl butyral, an ionomer, an ethylene-vinyl acetate, a thermoplastic polyurethane, a polyester, a polyethylene terephthalate, or a combination thereof.

### Claim 28 (depends on 1)

The laminate of claim 1, wherein the laminate is disposed in an opening of a vehicle, the vehicle further comprising a body defining an interior and the opening is in communication with the interior.

### Claim 29 (depends on 28)

The laminate of claim 28, wherein the second glass article faces the interior, and the first glass article faces an exterior of the vehicle.