Delamination resistant glass containers with heat-tolerant coatings

Patent metadata

Field	Value
Publication number	US-10273048-B2
Application number	US-201313827732-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Jun 7, 2012
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

Delamination resistant glass containers with heat-tolerant coatings are disclosed. In one embodiment, a glass container may include a glass body having an interior surface, an exterior surface and a wall thickness extending from the exterior surface to the interior surface. At least the interior surface of the glass body is delamination resistant. The glass container may further include a heat-tolerant coating positioned on at least a portion of the exterior surface of the glass body. The heat-tolerant coating may be thermally stable at temperatures greater than or equal to 260° C. for 30 minutes.

First claim

What is claimed is:

1. A glass container comprising:
a glass body having an interior surface and an exterior surface, the glass body formed from an aluminosilicate glass having a Class HGA1 hydrolytic resistance when tested according to the ISO 720 testing standard, wherein at least the interior surface of the glass body has a delamination factor of less than or equal to 3 and a threshold diffusivity of greater than about 16 μm 2 /hr at a temperature less than or equal to 450° C., and wherein the aluminosilicate glass comprises alkaline Earth oxides in an amount from 4 mol. % to 8 mol. % less than or equal to 4 mol. % B 2 O 3 , Al 2 O 3 in X mol. %, and alkali oxides in Y mol. %, and wherein a ratio Y:X is greater than or equal to 1; and
a heat-tolerant coating bonded to at least a portion of the exterior surface of the glass body, wherein the heat-tolerant coating is thermally stable at a temperature of at least 260° C. for 30 minutes, and wherein the heat-tolerant coating comprises a polymer selected from the group consisting of polyimides, fluoropolymers, silsesquioxane-based polymers, and silicone resins;
wherein the glass body has an interior region extending between the interior surface of the glass body and the exterior surface of the glass body, the interior region having a persistent layer homogeneity such that an extrema in the concentration of each constituent component in the interior region is greater than or equal to about 80% and less than or equal to about 120% of a concentration of the same constituent component at a mid-point of the thickness of the glass body when the glass container is in an as-formed condition, and wherein the interior region extends from 10 nm below the interior surface of the glass body to a depth D LR of at least 100 nm from the interior surface of the glass body.

2. The glass container of claim 1 , wherein the exterior surface of the glass body with the heat-tolerant coating has a coefficient of friction of less than about 0.7.

3. The glass container of claim 1 , wherein the heat-tolerant coating has a mass loss of less than about 5% of its mass when heated from a temperature of 150° C. to 350° C. at a ramp rate of about 10° C./minute.

4. The glass container of claim 1 , wherein the interior surface of the glass body has a persistent surface homogeneity such that for a discrete point on the interior surface of the glass container, an extrema of the concentration of each constituent component of the aluminosilicate glass in the surface region at the discrete point is greater than or equal to about 70% and less than or equal to about 130% of the same constituent component in the surface region at any second discrete point on the interior surface of the glass container when the glass container is in an as-formed condition.

5. The glass container of claim 4 , wherein the persistent surface homogeneity extends into a wall thickness of the glass body to a depth D SR of at least 10 nm from the interior surface of the glass body.

6. The glass container of claim 1 , wherein the glass body has a surface region that extends from the interior surface of the glass body into a wall thickness of the glass body, the surface region having a persistent surface homogeneity such that for a discrete point on the interior surface of the glass container, an extrema of the concentration of each constituent component of the glass in the surface region at the discrete point is greater than or equal to about 70% and less than or equal to about 130% of the same constituent component in the surface region at any second discrete point on the interior surface of the glass container when the glass container is in an as-formed condition.

7. The glass container of claim 6 , wherein the surface region extends into a wall thickness of the glass body to a depth D SR of at least 10 nm from the interior surface of the glass body.

8. The glass container of claim 1 , wherein the heat-tolerant coating comprises a coupling agent layer.

9. The glass container of claim 8 , wherein the coupling agent layer comprises at least one silane.

10. The glass container of claim 8 , wherein the heat-tolerant coating comprises a low-friction layer contacting the coupling agent layer.

11. The glass container of claim 1 , wherein the heat-tolerant coating comprises a low-friction layer comprising the polymer.

12. The glass container of claim 1 , wherein a light transmission through the coated portion of the glass container is greater than or equal to about 55% of a light transmission through an uncoated glass article for wavelengths from about 400 nm to about 700 nm.

13. The glass container of claim 1 , wherein the glass body has at least a class S3 acid resistance according to DIN 12116.

14. The glass container of claim 1 , wherein the glass body has at least a class A2 base resistance according to ISO 695.

15. The glass container of claim 1 , wherein the glass body has at least a type HgB2 hydrolytic resistance according to ISO 719.

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

17. The glass container of claim 1 , wherein the glass body has a compressive stress greater than or equal to 300 MPa in at least the exterior surface of the glass body and a depth of layer of at least 30 μm.

18. The glass container of claim 1 , wherein the aluminosilicate glass comprises less than 2 mol. % ZrO 2 .

19. A glass container comprising:
a glass body having an interior surface and an exterior surface, the glass body formed from an aluminosilicate glass having a Class HGA1 hydrolytic resistance when tested according to the ISO 720 testing standard, wherein at least the interior surface of the glass body has a delamination factor of less than or equal to 3 and a threshold diffusivity of greater than about 16 μm 2 /hr at a temperature less than or equal to 450° C., and wherein the aluminosilicate glass comprises alkaline Earth oxides in an amount from 4 mol. % to 8 mol. % less than or equal to 4 mol. % B 2 O 3 , Al 2 O 3 in X mol. %, and alkali oxides in Y mol. %, and wherein a ratio Y:X is greater than or equal to 1; and
a heat-tolerant coating bonded to at least a portion of the exterior surface of the glass body, wherein the exterior surface of the glass body with the heat-tolerant coating has a coefficient of friction of less than about 0.7, and wherein the heat-tolerant coating comprises a polymer selected from the group consisting of polyimides, fluoropolymers, silsesquioxane-based polymers, and silicone resins,
wherein the glass body has an interior region extending between the interior surface of the glass body and the exterior surface of the glass body, the interior region having a persistent layer homogeneity such that an extrema in the concentration of each constituent component in the interior region is greater than or equal to about 80% and less than or equal to about 120% of a concentration of the same constituent component at a mid-point of the thickness of the glass body when the glass container is in an as-formed condition, and wherein the interior region extends from 10 nm below the interior surface of the glass body to a depth D LR of at least 100 nm from the interior surface of the glass body.

20. The glass container of claim 19 , wherein the heat-tolerant coating is thermally stable at a temperature of at least 260° C. for 30 minutes.

21. The glass container of claim 19 , wherein the heat-tolerant coating is thermally stable at a temperature of at least 320° C. for 30 m

Assignees

• Corning Inc

Inventors

• Fadeev Andrei Gennadyevich
• Chang Theresa
• Bookbinder Dana Craig
• Pal Santona
• Saha Chandan Kumar
• Demartino Steven Edward
• Timmons Christopher Lee
• Peanasky John Stephen
• Schaut Robert Anthony
• Danielson Paul Stephen
• Drake Melinda Ann
• Morena Robert Michael
• Adib Kaveh

Classifications

• Y10T428/131

  Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.] · CPC title

• C03C17/3405

  with at least two coatings of organic materials (C03C17/36, C03C17/42 take precedence) · CPC title

• C03C2217/78

  Coatings specially designed to be durable, e.g. scratch-resistant · CPC title

• C09D179/08

  Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title

• C03C17/30

  with silicon-containing compounds · CPC title