Polymer edge-covered glass articles and methods for making and using same

{
  "publication_number": "US9573843B2",
  "country": "US",
  "kind": "B2",
  "title": "Polymer edge-covered glass articles and methods for making and using same",
  "abstract": "Described herein are various polymer-covered glass and glass-ceramic articles that exhibit improved adhesion between the polymer and the glass or glass-ceramic, along with methods for their manufacture and use. The improved articles generally include a glass or glass-ceramic substrate, a surface-roughened coating disposed on at least a portion of an edge of the glass or glass-ceramic substrate, and a polymer covering disposed on at least a portion of the surface-roughened coating. The surface-roughened coatings beneficially allow the polymer coverings to adhere better to the edge surfaces of the glass or glass-ceramic substrates relative to similar or identical articles that lack the surface-roughened coating.",
  "claims": [
    "1. A polymer-covered article, comprising: a glass or glass-ceramic substrate; a surface roughened coating having first and second surfaces, wherein the first surface is disposed on at least a portion of an edge surface of the glass or glass-ceramic substrate and the second surface of the coating is roughened; and a polymer covering disposed on at least a portion of the second surface of the surface-roughened coating, wherein the surface roughened coating comprises a component for mechanically binding with the polymer covering and a component for chemically binding with the glass or glass-ceramic substrate, and wherein the mechanical binding component comprises particles added to, and exposed on, at least the second surface of the surface-roughened coating.",
    "2. A polymer-covered article, comprising: a glass or glass-ceramic substrate; a surface roughened coating having first and second surfaces, wherein the first surface is disposed on at least a portion of an edge surface of the glass or glass-ceramic substrate and the second surface of the coating is roughened; and a polymer covering disposed on at least a portion of the second surface of the surface-roughened coating, wherein the surface roughened coating comprises a component for mechanically binding with the polymer covering and a component for chemically binding with the glass or glass-ceramic substrate, and wherein the mechanical binding component comprises a perforated insert added to at least the second surface of the surface-roughened coating.",
    "3. The polymer-covered article of claim 1 or 2, wherein the mechanical binding component further comprises texturing in the second surface of the surface-roughened coating.",
    "4. The polymer-covered article of claim 1 or 2, wherein the chemical binding component comprises an element or functional group or moiety that forms a chemical bond to the edge surface of the glass or glass-ceramic substrate.",
    "5. The polymer-covered article of claim 4, wherein the chemical binding component is selected from the group consisting of silanes, siloxanes, silsesquioxanes, oxides, acrylates, epoxies, and urethanes.",
    "6. The polymer-covered article of claim 1 or 2, wherein the mechanical binding component reduces the coefficient of thermal expansion mismatch between the substrate and the polymer covering.",
    "7. The polymer-covered article of claim 1 or 2, wherein the force needed to break the adhesion between the polymer covering and the substrate is at least 200 N as measured by a tensile tester 5 days after application of the polymer coating.",
    "8. The polymer-covered article of claim 1 or 2, wherein the force needed to break the adhesion between the polymer covering and the substrate is at least 300 N as measured by a tensile tester 5 days after application of the polymer coating.",
    "9. A method of making a polymer-covered article, the method comprising: forming a surface-roughened coating having first and second surfaces, wherein the first surface of the coating is disposed on at least a portion of a surface of an edge of a glass or glass-ceramic substrate and the second surface of the coating is roughened; and forming a polymer covering on at least a portion of the second surface of the surface-roughened coating, wherein the surface roughened coating comprises a component for mechanically binding with the polymer covering and a component for chemically binding with the glass or glass-ceramic substrate, and wherein the mechanical binding component comprises particles added to, and exposed on, at least the second surface of the surface-roughened coating.",
    "10. A method of making a polymer-covered article, the method comprising: forming a surface-roughened coating having first and second surfaces, wherein the first surface of the coating is disposed on at least a portion of a surface of an edge of a glass or glass-ceramic substrate and the second surface of the coating is roughened; and forming a polymer covering on at least a portion of the second surface of the surface-roughened coating, wherein the surface roughened coating comprises a component for mechanically binding with the polymer covering and a component for chemically binding with the glass or glass-ceramic substrate, and wherein the mechanical binding component comprises a perforated insert added to at least the second surface of the surface-roughened coating.",
    "11. The method of claim 9 or 10, wherein the mechanical binding component further comprises texturing in the second surface of the surface-roughened coating.",
    "12. The method of claim 9 or 10, wherein the chemical binding component comprises an element or functional group or moiety that forms a chemical bond to the edge surface of the glass or glass-ceramic substrate.",
    "13. The method of claim 9 or 10, wherein the chemical binding component is selected from the group consisting of silanes, siloxanes, silsesquioxanes, oxides, acrylates, epoxies, and urethanes.",
    "14. The method of claim 9 or 10, wherein the mechanical binding component reduces the coefficient of thermal expansion mismatch between the substrate and the polymer covering.",
    "15. The method of claim 9 or 10, wherein the force needed to break the adhesion between the polymer covering and the substrate is at least 200 N as measured by a tensile tester 5 days after application of the polymer coating.",
    "16. The method of claim 9 or 10, wherein the force needed to break the adhesion between the polymer covering and the substrate is at least 300 N as measured by a tensile tester 5 days after application of the polymer coating."
  ],
  "description_excerpt": "The present disclosure relates generally to polymer coverings for glass or glass-ceramic articles. More particularly, the various embodiments described herein relate to glass or glass-ceramic articles having polymer coverings disposed on an edge thereof such that there is improved adhesion between the polymer covering and the glass or glass-ceramic article, as well as to methods of making and using the covered glass articles.\n\nMethods of applying polymeric materials to glass surfaces have long been of interest for a variety of purposes. Such purposes have included the provision of bezels or frames, stain resistance, reflection- or glare-resistance, and impact absorbance or resistance, among others.\n\nBy virtue of their incompatibility, it traditionally has been difficult to apply certain types of polymers to glass surfaces in a manner that results in minimal to no delamination. To overcome these inherent difficulties, methods to improve the adhesion between polymers and glass have been developed. For example, some of these methods include the use of compatibilizing agents (e.g., primers, adhesion promoters, or coupling agents), adhesive laminates, or mechanical means. Even with the use of such methods, delamination of the polymer from the glass can occur.\n\nBy way of illustration, it is economically desirable to use injection molding to overmold glass articles with a polymer to fabricate outward-facing components of electronic devices (e.g., cell phones, televisions, laptop computers, tablets, and the like). For example, the overmolding process can be used to encase glass with an impact resistant polymer.",
  "cpc": [
    "C03C 17/32",
    "C03C 17/3405",
    "C03C 17/42",
    "C03C 2217/445",
    "C03C 2217/47",
    "C03C 2217/475",
    "C03C 2217/478",
    "C03C 2217/48",
    "C03C 2217/77",
    "C03C 2218/152",
    "Y10T 428/24777"
  ],
  "ipc": [
    "H05K 5/03",
    "C03C 17/32",
    "B32B 3/10",
    "C03C 17/34",
    "C03C 17/42"
  ],
  "assignees": [
    "Corning Inc"
  ],
  "inventors": [
    "Kimberly Michelle Keegan",
    "Nagaraja Shashidhar",
    "Paul John Shustack",
    "Kevin Andrew Vasilakos"
  ],
  "filing_date": "2014-07-30",
  "publication_date": "2017-02-21",
  "grant_date": "2017-02-21",
  "priority_date": "2013-08-05",
  "application_number": "US-201414446928-A",
  "family_id": "51352852",
  "cited_by_count": 38,
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}