Granted Patent B2

US 12,275,671 · App. 17/699,447 · Granted Apr 15, 2025

Inventors: Paul Stephen Danielson (Dundee, NY); Steven Edward DeMartino (Painted Post, NY); Melinda Ann Drake (Corning, NY); Robert Michael Morena (Lindley, NY); Santona Pal (Painted Post, NY); Robert Anthony Schaut (Painted Post, NY)

Assignee: Corning Incorporated

C03C3/087A61J1/00C03C3/091C03C4/18C03C4/20C03C21/002C03C2204/00Y10T428/131Y10T428/1317Y10T428/26Y10T428/315

Abstract

Claims (60)

1. A glass comprising:

74 mol. % to 78 mol. % SiO 2 ;

X mol. % Al 2 O 3 , wherein X is greater than or equal to 5 and less than 7;

alkaline earth metal oxide comprising MgO and CaO, wherein:

CaO is present in an amount greater than or equal to 0.1 mol. % and less than or equal to 1.0 mol. %;

MgO is present in an amount greater than or equal to 4 mol. % and less than or equal to 7 mol. %; and

a ratio (CaO (mol. %)/(CaO (mol. %)+MgO (mol. %)) is less than or equal to 0.2;

Y mol. % alkali metal oxide, wherein the alkali metal oxide comprises Na 2 O in an amount greater than 9 mol. % and less than or equal to 13 mol. %; and

less than or equal to 0.4 mol. % of a fining agent, wherein the glass composition is free of boron and compounds of boron.

2. The glass of claim 1 comprising greater than or equal to 0.01 mol. % and less than or equal to 3 mol. % K 2 O.

3. The glass of claim 1 , wherein Y is greater than or equal to 9 and less than or equal to 14.

4. The glass of claim 1 , wherein the alkaline earth metal oxide is present in an amount less than 13 mol. %.

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

6. The glass of claim 1 , wherein a ratio of Y:X is greater than or equal to 1.3 and less than or equal to 2.

7. The glass of claim 1 comprising:

76.8 mol. % SiO 2 ;

6 mol. % Al 2 O 3 ;

10.7 mol. % Na 2 O;

1 mol. % K 2 O;

4.8 mol. % MgO;

0.5 mol. % CaO; and

0.2 mol. % SnO 2 .

8. The glass of claim 1 comprising:

76.99 mol. % SiO 2 ;

5.98 mol. % Al 2 O 3 ;

11.38 mol. % Na 2 O;

0.1 mol. % K 2 O;

5.23 mol. % MgO;

and

0.2 mol. % SnO 2 .

9. The glass of claim 1 comprising:

76.8 mol. % SiO 2 ;

6 mol. % Al 2 O 3 ;

11.6 mol. % Na 2 O;

0.1 mol. % K 2 O;

4.8 mol. % MgO;

0.5 mol. % CaO; and

0.2 mol. % SnO 2 .

10. The glass of claim 1 comprising:

76.3 mol. % SiO 2 ;

6.35 mol. % Al 2 O 3 ;

11.67 mol. % Na 2 O;

0.02 mol. % K 2 O;

5.30 mol. % MgO;

0.16 mol. % CaO; and

0.2 mol. % SnO 2 .

11. The glass of claim 1 comprising:

76.9 mol. % SiO 2 ;

7.0 mol. % Al 2 O 3 ;

10.5 mol. % Na 2 O;

0.1 mol. % K 2 O;

4.88 mol. % MgO;

0.48 mol. % CaO; and

0.2 mol. % SnO 2 .

12. The glass of claim 1 , comprising an average coefficient of thermal expansion of less than 60×10 −7 K −1 from room temperature to 300° C.

13. The glass of claim 1 , comprising an acid resistance of at least class S2 according to DIN 12116.

14. The glass of claim 1 , comprising a base resistance of at least class A2 according to ISO 695.

15. The glass of claim 1 , comprising a hydrolytic resistance of at least HGA2 according to ISO 720.

16. The glass of claim 1 , comprising a hydrolytic resistance of at least HGB2 according to ISO 719.

17. The glass of claim 1 , wherein the glass is a pharmaceutical package.

Assignments (1)

Continuity (6)

References Cited (229)