Method of manufacturing laminated glass articles with improved edge condition

Patent metadata

Field	Value
Publication number	US-2016152006-A1
Application number	US-201414898017-A
Country	US
Kind code	A1
Filing date	Jun 13, 2014
Priority date	Jun 14, 2013
Publication date	Jun 2, 2016
Grant date	—

Abstract

A method of manufacturing a laminated glass article having a first clad layer, a second clad layer, and a core layer between the first clad layer and the second clad layer, by exposing an edge of the core layer. An etchant can be applied to the edge of the laminated glass article to form the recess. The recess can then be filled.

First claim

1 . A method of manufacturing a laminated glass article comprising a glass first clad layer, a glass second clad layer, a glass core layer between the first clad layer and the second clad layer, and an edge, each of the first clad layer and the second clad layer fused to the core layer, the method comprising:
applying an etchant to the edge of the laminated glass article, the core layer exposed at the edge; forming a recess in the edge of the laminated glass article by removing at least a portion of the core layer with the etchant, wherein the recess spans between the first clad layer and the second clad layer; and filling the recess.

2 . The method of claim 1 , wherein the etchant etches the core layer faster than the first clad layer and the second clad layer.

3 . The method of claim 1 , wherein the core layer is at least about 5 times more soluble in the etchant than the first clad layer and the second clad layer.

4 . The method of claim 1 , wherein a thickness of the laminated glass article is about 4 mm or less and a thickness of each of the first clad layer and the second clad layer is from about 10 μm to about 200 μm.

5 . (canceled)

6 . The method of claim 1 , wherein the core layer has a coefficient of thermal expansion the same as or higher than a coefficient of thermal expansion of each of the first clad layer and the second clad layer.

7 . The method of claim 1 , wherein an etch rate of the first clad layer and the second clad layer is from about 0.10 μm/min to about 1.00 μm/min, and an etch rate of the core layer is from about 2.00 μm/min to about 5.00 μm/min.

8 . The method of claim 1 , wherein the etchant comprises hydrofluoric acid, hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, ammonium bifluoride, or mixtures thereof.

9 . (canceled)

10 . The method of claim 1 , wherein the filling step comprises filling the recess with a polymer filler material.

11 . The method of claim 1 , wherein the filling step comprises manipulating at least one of the first clad layer or the second clad layer to fill the recess.

12 - 13 . (canceled)

14 . The method of claim 10 , wherein the polymer filler material comprises a polymer selected from the group consisting of 2-part epoxies, 2-part urethanes, 2-part acrylics, 2-part silicones, moisture-cure urethanes, moisture-cure epoxies, phenolics, novolacs, urea formaldehyde, melamine formaldehyde, crosslinking acrylics, crosslinking vinyls, alkyds, unsaturated polyesters, polyimides, and polyamides.

15 . The method of claim 1 , wherein the filling step comprises:
applying a liquid pre-polymeric material to the at least one edge of the laminated glass article; and curing the liquid pre-polymeric material to form a protective polymeric layer.

16 . The method of claim 15 , wherein the curing step comprises photo curing or electron beam curing.

17 . The method of claim 15 , wherein the pre-polymeric material is a material selected from the group consisting of a free radical addition polymerizable pre-polymeric material, a free radical step growth polymerizable pre-polymeric material, and a cationic addition polymerizable pre-polymeric material.

18 . The method of claim 15 , wherein the pre-polymeric material comprises at least one additive selected from the group consisting of silica, alumina, quartz, cristobalite, silanes, zirconates, titanates, and acid functional materials.

19 - 20 . (canceled)

21 . The method of claim 11 , wherein the manipulating step comprises softening a portion of at least one of the first clad layer and or the second clad layer such that the portion of at least one of the first clad layer and or the second clad layer at least partially fills the recess.

22 - 30 . (canceled)

31 . A laminated glass article comprising:
a glass first clad layer; a glass second clad layer; a glass core layer between the first clad layer and the second clad layer, each of the first clad layer and the second clad layer fused to the core layer; a recess in an edge of the laminated glass article and disposed between the first clad layer and the second clad layer; and a filler material disposed within the recess.

32 . The laminated glass article of claim 31 , wherein a thickness of the laminated glass sheet is about 4 mm or less and a thickness of each of the first clad layer and the second clad layer is from about 10 μm to about 200 μm.

33 . (canceled)

34 . The laminated glass article of claim 31 , wherein the core layer has a coefficient of thermal expansion higher than or the same as a coefficient of thermal expansion than of each of the first clad layer and the second clad layer.

35 . The laminated glass article of claim 31 , wherein the filler material comprises a polymer filler material.

36 . The laminated glass article of claim 35 , wherein the polymer filler material is selected from the group consisting of 2-part epoxies, 2-part urethanes, 2-part acrylics, 2-part silicones, moisture-cure urethanes, moisture-cure epoxies, phenolics, novolacs, urea formaldehyde, melamine formaldehyde, crosslinking acrylics, crosslinking vinyls, alkyds, unsaturated polyesters, polyimides, and polyamides.

37 . The laminated glass article of claim 31 , wherein the laminated glass article comprises a laminated glass sheet or a laminated glass tube.

38 - 39 . (canceled)

40 . An electronic device, an architectural glass pane, an automotive glazing, a vehicular glass member, or an appliance comprising the laminated glass article of claim 31 .

41 - 46 . (canceled)

Assignees

• Corning Inc

Inventors

• Boek Heather Debra
• Cleary Thomas Michael
• Gallagher Michael Thomas
• Shustack Paul John
• Weller Mark Owen

Classifications

• B32B2509/00

  Household appliances · CPC title

• C03B23/0026

  by gravity, e.g. sagging (C03B23/02, C03B23/04, C03B23/18 take precedence) · CPC title

• C03C15/00

  Surface treatment of glass, not in the form of fibres or filaments, by etching (etching or surface-brightening compositions, in general C09K13/00) · CPC title

• B32B2250/03

  3 layers · CPC title

• B32B3/08

  characterised by added members at particular parts {(layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18)} · CPC title