Laminated glazing panel, method for making same, and method for mounting and using said glazing

• US 6,131,563 A
• Filed: 11/07/1997
• Issued: 10/17/2000
• Est. Priority Date: 09/21/1995
• Status: Expired due to Fees

• Current Assignee: Saint-Gobain Vitrage
• Original Assignee: Saint-Gobain Vitrage
• Inventors: Rhetat, Eric, Cartigny, Michel, Bonnetin, Alain, Bauchet, Jean-Paul
• Primary Examiner(s): Price, Carl D.
• Application Number:
  US08/836,666
• Time in Patent Office: 1,075 Days
• Field of Search: 428/428, 428/429, 126/373
• US Class Current: 126/373.1
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10091 thermally hardened
• CPC Class Codes: B32B 17/10137 Chemical strengthening
• CPC Class Codes: B32B 17/10155 Edge treatment or chamfering
• CPC Class Codes: B32B 17/10798 containing silicone
• CPC Class Codes: B32B 17/10908 in liquid form
• CPC Class Codes: B32B 17/10981 Pre-treatment of the layers

Abstract

The invention relates to a laminated glazing panel having at lest two sheets of glass and to a manufacturing process. According to the invention, this glazing panel has sheets of glass have undergone a strengthening treatment and at least two sheets of the glass are separated by a silicone interlayer. The invention also pertains especially to the use as a window of a vessel in which there is a high pressure and/or a high temperature and/or a high moisture content, as well as to the mounting of the said window.

Claims

1. Laminated glazing panel comprising:

at least two sheets of glass separated by an interlayer, wherein the sheets of glass comprise glass sheets which have undergone a strengthening treatment and a silicone interlayer pivotal which separate at least two of said sheets of glass wherein the strengthening of the glass sheets is carried out by thermal toughening of first and second sheets of the glass sheets having an outwardly oriented face and by chemical toughening with respect to a third sheet of said sheets of glass which is positioned between said first and second sheets of glass.

2. Glazing panel according to claim 1, wherein the silicone interlayer is based on a one-component acetic silicone which polymerizes in air.

3. Glazing panel according to claim 1, wherein the silicone interlayer is a two-component silicone.

4. Glazing panel according to claim 3, wherein the interlayer adheres to the sheets of glass via an adhesion primer.

5. Glazing panel according to claim 1, wherein each said external face of the glazing panel has scratch-proof layers.

6. Glazing panel according to claim 1 wherein at least one of the sheets is shaped so as to have a rounded profile.

7. Glazing panel according to one of the preceding claims, wherein the sheets of glass are spaced apart by the presence of spacers such that they have a thickness of at least 0.25 mm and preferably of at least 0.30 mm.

8. A glazing panel according to one of claims 1 to 4, 5 and 6 wherein said sheets of glass comprise a window of a vessel having a high pressure and/or a high temperature and/or a high moisture content.

9. Process for manufacturing a glazing panel having at least two sheets of glass separated from each other by spacers, which comprises depositing a layer of liquid adhesive on at least one face of one of said at least two sheets of glass,

depositing the spacers on said layer;

fixing said spacers by drying said layer; and

strengthening said sheets by thermally toughening first and second sheets of said at least two sheets of glass and chemically toughening a third sheet of said sheets of glass positioned between said first and second sheets of glass.

10. Process according to claim 9, when the glazing panel comprises at least two sheets of glass bonded to each other by the combination of a priming agent and a silicone interlayer, wherein the silicone interlayer is deposited after being separated by the spacers.

11. Method of fixing a glazing panel in the wall of a vessel, which comprises:

depositing a layer of liquid adhesive on at least one face of a sheet of glass;

depositing the spacers on said layer;

fixing said spacers by drying said layer;

strengthening said sheets by thermally toughening first and second sheets of said sheets of glass;

chemically toughening a third sheet of glass positioned between said first and second sheets of glass; and

holding the glazing panel in place by a peripheral seal compressed by a peripheral clamp.

12. Method according to claim 11, which comprises fixing the glazing panel by bearing;

via the said seal, the glazing panel against a face of a wall oriented towards an inside portion of the vessel.

13. A vessel for cooking under pressure, a pressure cooker, having a glazing panel which formed by the method claimed in either of claims 11 and 12.

14. Steam generator having a glazing panel which which is formed according to the method claimed in either of claims 11 and 12.