Glass compositions with improved chemical and mechanical durability

Patent metadata

Field	Value
Publication number	US-10597322-B2
Application number	US-201715449766-A
Country	US
Kind code	B2
Filing date	Mar 3, 2017
Priority date	Oct 25, 2011
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

The embodiments described herein relate to chemically and mechanically durable glass compositions and glass articles formed from the same. In another embodiment, a glass composition may include from about 70 mol. % to about 80 mol. % SiO2; from about 3 mol. % to about 13 mol. % alkaline earth oxide; X mol. % Al2O3; and Y mol. % alkali oxide. The alkali oxide may include Na2O in an amount greater than about 8 mol. %. A ratio of Y:X may be greater than 1 and the glass composition may be free of boron and compounds of boron. In some embodiments, the glass composition may also be free of phosphorous and compounds of phosphorous. Glass articles formed from the glass composition may have at least a class S3 acid resistance according to DIN 12116, at least a class A2 base resistance according to ISO 695, and a type HGA1 hydrolytic resistance according to ISO 720.

First claim

What is claimed is:

1. A glass article comprising:
a type HGB1 hydrolytic resistance according to ISO 719;
a compressive stress layer with a depth of layer of greater than 25 μm;
a surface compressive stress of greater than or equal to 350 MPa, wherein the glass article is ion exchange strengthened and the ion exchange strengthening comprises treating the glass article in a molten salt bath for a time less than or equal to 5 hours at a temperature less than or equal to 450° C.;
SiO 2 in an amount greater than or equal to 67 mol.% and less than or equal to 80 mol.%;
alkaline earth oxide in an amount greater than or equal to 3 mol.% and less than or equal to 13 mol.%, wherein the alkaline earth oxide comprises MgO and CaO and a ratio (CaO (mol.%)/(CaO (mol.%)+MgO (mol.%))) is less than or equal to 0.5;
X mol.% Al 2 O 3 wherein X is greater than 5 mol.% and less than or equal to about 10 mol.%; and
Y mol.% alkali oxide wherein Y is greater than or equal to 2 mol.% and less than or equal to 18 mol.%, wherein the glass article is a pharmaceutical package.

2. The glass article of claim 1 , wherein the amount of the alkaline earth oxide is greater than or equal to 4 mol.% and less than or equal to 8 mol.%.

3. The glass article of claim 1 , wherein the alkaline earth oxide comprises from 0.1 mol.% to less than or equal to 1.0 mol.% CaO.

4. The glass article of claim 1 , wherein the alkaline earth oxide comprises from 3 mol.% to 7 mol.% MgO.

5. The glass article of claim 1 , wherein the alkali oxide comprises greater than or equal to 9 mol.% Na 2 O and less than or equal to 15 mol.% Na 2 O.

6. The glass article of claim 1 , wherein the alkali oxide comprises K 2 O in an amount greater than or equal to 0.01 mol.% and less than or equal to 1.0 mol.%.

7. The glass article of claim 1 , wherein X is greater than 5 mol.% and less than or equal to 7 mol.%.

8. The glass article of claim 1 , wherein a ratio of Y:X is greater than or equal to 1 and less than or equal to 2.

9. The glass article of claim 1 , wherein the glass composition is free of boron and compounds of boron.

10. The glass article of claim 1 , wherein the glass article has a type HGA1 hydrolytic resistance according to ISO 720 after ion exchange strengthening.

11. The glass article of claim 1 , wherein the glass article has a threshold diffusivity of greater than 16 μm 2 /hr at a temperature of less than or equal to 450° C.

12. The glass article of claim 11 , wherein the threshold diffusivity is greater than or equal to 20 μm 2 /hr at a temperature of less than or equal to 450° C.

13. A glass pharmaceutical container comprising:
a type HGB1 hydrolytic resistance according to ISO 719;
at least a class A2 base resistance or better according to ISO 695;
a Type 1 chemical durability according to USP <660>;
a compressive stress layer with a depth of layer of greater than 25 μm; and a surface compressive stress of greater than or equal to 150 MPa, wherein the glass pharmaceutical container is ion exchange strengthened and the ion exchange strengthening comprises treating the glass pharmaceutical container in a molten salt bath for a time less than or equal to 10 hours at a temperature less than or equal to 450° C.;
SiO 2 in an amount greater than or equal to 70 mol.% and less than or equal to 78 mol.%;
alkaline earth oxide in an amount greater than or equal to 4 mol.% and less than or equal to 8 mol.%;
X mol.% Al 2 0 3 , wherein X is greater than 5 mol.% and less than or equal to 7 mol.%;
Y mol.% alkali oxide wherein Y is greater than or equal to 8 mol.% and less than or equal to 18 mol.%;
a ratio of a concentration of B 2 O 3 (mol.%) in the glass pharmaceutical container to (Y mol.% −X mol.%) is less than 0.3; and
a ratio of Y:X is greater than 1.

14. The glass pharmaceutical container of claim 13 , wherein the alkaline earth oxide comprises MgO and CaO and a ratio (CaO (mol.%)/(CaO (mol.%)+MgO (mol.%))) is less than or equal to 0.5.

15. The glass pharmaceutical container of claim 13 , wherein the alkaline earth oxide comprises from 3 mol.% to 7 mol.% MgO.

16. The glass pharmaceutical container of claim 13 , wherein the alkaline earth oxide comprises CaO in an amount greater than or equal to 0.1 mol.% and less than or equal to 1.0 mol.%.

17. The glass pharmaceutical container of claim 13 , wherein the alkali oxide comprises greater than or equal to 9 mol.% Na 2 O and less than or equal to 13 mol.% Na 2 O.

18. The glass pharmaceutical container of claim 13 , wherein the alkali oxide further comprises K 2 O in a concentration greater than or equal to 0.01 mol.% and less than or equal to 1.0 mol.%.

19. The glass pharmaceutical container of claim 13 , wherein the ratio of Y:X is less than or equal to 2.

20. The glass pharmaceutical container of claim 13 , wherein a ratio of Y:X is greater than 1.3.

21. The glass pharmaceutical container of claim 13 , wherein the glass pharmaceutical container is free from boron and compounds of boron.

22. The glass pharmaceutical container of claim 13 , wherein the concentration of B 2 O 3 is greater than or equal to 0.01 mol.%.

23. The glass pharmaceutical container of claim 22 , wherein the concentration of B 2 O 3 is less than 4 mol.%.

24. The glass pharmaceutical container of claim 13 , wherein the surface compressive stress is greater than or equal to 250 MPa.

Assignees

• Corning Inc

Inventors

• Danielson Paul Stephen
• Demartino Steven Edward
• Drake Melinda Ann
• Morena Robert Michael
• Pal Santona
• Schaut Robert Anthony

Classifications

• A61J1/065

  Rigid ampoules, e.g. glass ampoules · CPC title

• Y10T428/315

  Surface modified glass [e.g., tempered, strengthened, etc.] · CPC title

• Y10T428/1317

  Multilayer [continuous layer] · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title

• C03C3/091

  containing aluminium · CPC title