Delamination resistant glass containers with heat-tolerant coatings

Patent metadata

Field	Value
Publication number	US-12391600-B2
Application number	US-202218087234-A
Country	US
Kind code	B2
Filing date	Dec 22, 2022
Priority date	Jun 28, 2012
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

Disclosed herein are glass containers which may include a glass body comprising an alkali aluminosilicate glass composition having a Class HGA1 hydrolytic resistance when tested according to the ISO 720:1985 testing standard. The glass body may have an interior surface and an exterior surface. A heat-tolerant coating may be bonded to at least a portion of the exterior surface of the glass body. The heat-tolerant coating may have a coefficient of friction of less than about 0.7 and is thermally stable at a temperature of at least 260° C. for 30 minutes. The heat-tolerant coating may comprise a polymer, and the heat-tolerant coating may have a thickness of less than or equal to 100 nm.

First claim

What is claimed is:

1. A glass container comprising:
a glass body comprising an alkali aluminosilicate glass composition having a Class HGA1 hydrolytic resistance when tested according to the ISO 720:1985 testing standard, the glass body having an interior surface and an exterior surface;
and
a heat-tolerant coating bonded to at least a portion of the exterior surface of the glass body but not bonded onto any portion of the interior surface of the glass body, wherein the heat-tolerant coating has a coefficient of friction of less than about 0.7 and is thermally stable at a temperature of at least 260° C. for 30 minutes, wherein the heat-tolerant coating comprises a polymer, and wherein the heat-tolerant coating has a thickness of less than 100 nm.

2. The glass container of claim 1 , 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 a 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 bulk concentration of the same constituent component at a mid-point of a thickness of the glass body when the glass container is in an as-formed condition; and
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 a concentration of each constituent component of the glass in a 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.

3. The glass container of claim 2 , wherein the interior region has a thickness T LR of at least about 100 nm.

4. The glass container of claim 2 , wherein the interior region extends from 10 nm below the interior surface of the glass body and has a thickness T LR of at least about 100 nm.

5. The glass container of claim 2 , wherein the persistent surface homogeneity extends into a wall thickness of the glass body to a depth from about 10 nm to about 50 nm from the interior surface of the glass body.

6. The glass container of claim 2 , wherein the surface region extends into a wall thickness of the glass body to a depth of at least 10 nm from the interior surface of the glass body.

7. 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.

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 further comprises a low-friction layer contacting the coupling agent layer.

11. The glass container of claim 1 , wherein the heat-tolerant coating is thermally stable at a temperature of at least 320° C. for 30 minutes.

12. The glass container of claim 1 , wherein the polymer is selected from the group consisting of polyimides, polybenzimidazoles, polysulfones, polyetheretherketones, polyetherimides, polyamides, polyphenyls, polybenzothiazoles, polybenzoxazoles, polybisthiazoles, polyaromatic heterocyclic polymers, silsesquioxane-based polymers, and silicone resins.

13. The glass container of claim 1 , wherein a light transmission through a 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.

14. The glass container of claim 1 , wherein the glass body has at least a class S3 acid resistance according to DIN 12116 dated March 2001.

15. The glass container of claim 1 , wherein the glass body has at least a class A2 base resistance according to ISO 695:1991.

16. The glass container of claim 1 , wherein the glass body has at least a type HGB2 hydrolytic resistance according to ISO 719:1985.

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 glass body is substantially free from boron and compounds containing boron.

Assignees

• Corning Inc

Inventors

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

Classifications

• B65D25/14

  Linings or internal coatings (of containers made by folding or erecting blanks made of paper B65D5/56 {; linings for domestic water storage heaters F24H1/183}) · CPC title

• B32B17/06

  comprising glass as the main or only constituent of a layer, next to another layer of a specific {material} · CPC title

• C03C2218/111

  by dipping, immersion · CPC title

• C03C17/32

  with synthetic or natural resins (C03C17/30 takes precedence) · CPC title

• C03C17/30

  with silicon-containing compounds · CPC title