# US 11,028,007 B2 · Automotive glass compositions, articles and hybrid laminates

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- Number: US 11,028,007 B2
- Document ID: US11028007B2
- Status: Granted
- Kind: B2
- Application number: 16/002,276
- Filed: 2018-06-07
- Published: 2018-12-27
- Granted: 2021-06-08
- Earliest claimed: 2017-06-22
- Assignees: Corning Incorporated
- Applicants: Corning Incorporated
- Inventors: Timothy Michael Gross; Zhongzhi Tang; Lisa Anne Tietz Moore
- Web page: https://patentgrep.com/patent/US11028007B2

## CPC

- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- B32B 17/10119: {having a composition deviating from the basic composition of soda-lime glass, e.g. borosilicate}
- B32B 17/10137: {Chemical strengthening}
- C03C 3/085: containing an oxide of a divalent metal
- C03C 3/097: containing phosphorus, niobium or tantalum
- C03C 21/002: {to perform ion-exchange between alkali ions (C03C21/005 takes precedence)}
- 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

## Abstract

Embodiments of glass articles comprising an anneal point (° C.) and a softening point (° C.), and the relationship of (anneal point+softening point)/2 in a range from about 625° C. to about 725° C. are disclosed. In one or more embodiments, the glass articles include a glass composition including SiO2 in an amount in a range from about 63 mol % to about 75 mol %; Al2O3 in an amount in a range from about 7 mol % to about 13 mol %; R2O in an amount from about 13 mol % to about 24 mol %; P2O5 in an amount in a range from about 0 mol % to about 3 mol %, and one or both of MgO and ZnO. Laminates including such glass articles, and methods for making 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 63 mol % to 75 mol %;
Al2O3 in an amount in a range from 7 mol % to 13 mol %;
R2O in an amount from 13 mol % to 24 mol %, wherein R2O=Li2O+Na2O+K2O;
P2O5 in an amount in a range from 0 mol % to 3 mol %;
Fe2O3 in an amount in a range from 0.01 mol % to 1 mol %;
wherein the glass composition comprises one or both of MgO and ZnO, wherein an amount of MgO is in a range from 0 mol % to 7 mol % and wherein an amount of ZnO is in a range from 0 mol % to 7 mol %,
wherein the glass composition is substantially free of Li2O,
wherein the glass composition is substantially free of B2O3,
wherein the glass article comprises a softening point in a range from 725° C. to 810° C.; and
wherein the glass article comprises an anneal point (° C.) and a softening point (° C.), and the relationship of (anneal point+softening point)/2 is in a range from 625° C. to 725° C.

### Claim 2 (depends on 1)

The glass article of claim 1, wherein the amount of Al2O3 is in a range from 8 mol % to 11 mol %, an amount of Na2O is in a range from 12 mol % to 18 mol %, and an amount of K2O is in a range from 1 mol % to 3.5 mol %.

### Claim 3 (depends on 1)

The glass article of claim 1, wherein the relationship (anneal point+softening point)/2 is less than 700° C.

### Claim 4 (depends on 1)

The glass article of claim 1, wherein the glass article comprises a temperature (° C.) at a viscosity of 200 poises (T200), and wherein the difference between the relationship (anneal point+softening point)/2 and T200 is less than −800° C.

### Claim 5 (depends on 1)

The glass article of claim 1, wherein the glass article comprises a temperature (° C.) at a viscosity of 35000 poises (T35000), and wherein the difference between the relationship (anneal point+softening point)/2 and T35000 is less than −300° C.

### Claim 6 (depends on 1)

The glass article of claim 1, wherein the glass article comprises a sag temperature in a range from 620° C. to 720° C.

### Claim 7 (depends on 1)

The glass article of claim 1, wherein the glass article comprises a temperature (° C.) at a viscosity of 200 poises (T200) and a temperature (° C.) at a viscosity of 35000 poise (T35000), and wherein T200-T35000 is in a range from 400° C. to 600° C.

### Claim 8 (depends on 7)

The glass article of claim 7, wherein either one of or both T200 and T35000 are greater than 1030° C.

### Claim 9 (depends on 1)

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