LAMINATED GLAZING AND SEALING AND PERIPHERAL REINFORCING MEANS FOR SAME

• US 20090181203A1
• Filed: 04/04/2007
• Published: 07/16/2009
• Est. Priority Date: 04/10/2006
• Status: Abandoned Application

• Current Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Inventors: Valentin, Emmanuel, Dubrenat, Samuel, Fanton, Xavier
• Application Number:
  US12/296,035
• Publication Number:
  US 20090181203A1
• Time in Patent Office: Days
• US Class Current: 428/38
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10045 with at least one intermediate layer consisting of a glass sheet
• CPC Class Codes: B32B 17/10302 Edge sealing
• CPC Class Codes: B32B 17/10467 Variable transmission
• CPC Class Codes: B32B 17/1077 containing polyurethane
• CPC Class Codes: B64C 1/1492 Structure and mounting of the transparent elements in the window or windscreen
• CPC Class Codes: E04F 13/145 with an outer layer of glass
• CPC Class Codes: G02F 1/157 Structural association of cells with optical devices, e.g. reflectors or illuminating devices

Abstract

Laminated window comprising two substrates (S1, S2) between which an active system (3) is placed, characterized in that the window is provided with a first peripheral sealing means (10) for sealing the active system 3, in particular against water in vapor form, comprising at least one seal based on one or more hot-melt polymers chosen from at least one of the following polymer families: ethylene/vinyl acetate, polyisobutylene, butyl rubber and polyamide, and a second sealing means (11), especially for sealing against liquid water, this second sealing means being positioned between the substrates and peripherally with respect to the first sealing means (10).

Claims

1. :

A laminated window comprising two thin substrates (S1, S2) between which an active system (3) is placed, characterized in that the window is provided with a first peripheral sealing means (10) for sealing the active system, in particular against water in vapor form, comprising at least one seal based on one or more hot-melt polymers chosen from at least one of the following polymer families;

ethylene/vinyl acetate, polyisobutylene, butyl rubber and polyamide, and a second sealing means (11), especially for sealing against liquid water, this second sealing means being positioned between the substrates (S1, S2) and peripherally with respect to the first sealing means (10), this second sealing means (11) being at least one frame portion produced from a sheet of thermoplastic.

2. :

The window as claimed in claim 1, characterized in that the sheet of thermoplastic is based on EVA, PU, PVB, polyethylene acrylate or sulfur-containing polymers, especially of the same kind as the interlayer polymer sheet(s) used for laminating said window.

3. :

The window as claimed in claim 1, characterized in that the active system (3) is an electrochemical system, especially an electrically controllable system having variable energy/optical properties, such as an all-solid-state or polymeric electrochromic system, an optical-valve system, a liquid-crystal system, a viologen-based system, a photovoltaic system or an electroluminescent system.

4. :

The window as claimed in claim 1, characterized in that the active system (3) is a thermochromic, thermotropic, photochromic, solar-control or low-emissivity layer or multilayer.

5. :

The window as claimed in claim 1, characterized in that it is in the form of a laminated window with two rigid or semi-rigid substrates (S1, S2) between which is the electroactive system (3) surmounted by at least one interlayer sheet (f1) based on a thermoplastic polymer.

6. :

The window as claimed in claim 5, characterized in that the interlayer sheet(s) (f1) has (have) smaller dimensions than those of the two substrates (S1, S2) so as to create a peripheral groove between said substrates, the seal(s) of the first peripheral sealing means (10) and of the second sealing means (11) being at least partly, and preferably entirely, housed in said groove.

7. :

The window as claimed in claim 1, characterized in that the seal(s) of the first peripheral sealing means (10) has (have) a softening point at room temperature.

8. :

The window as claimed in claim 1, characterized in that the seal(s) of the first peripheral sealing means (10) has (have) a viscosity of between 0.1 and 20 Pa.s, especially between 0.8 and 8 Pa.s, at 190°

C.

9. :

The window as claimed in claim 1, characterized in that the seal(s) of the first peripheral sealing means (10) has (have) a permeability to water in vapor form not exceeding 5 or 4 or 3 g/m2/24 h according to the ASTM E 9663 T standard.

10. :

The window as claimed in claim 1, characterized in that the seal(s) of the first peripheral sealing means (10) is (are) laid by extrusion or injection in the liquid phase.

11. :

The window as claimed in claim 1, characterized in that the first and second peripheral sealing means (10, 11) comprise seals that are juxtaposed.

12. :

The window as claimed in claim 1, characterized in that all of the seals of the peripheral sealing means (10, 11) are housed in the peripheral groove present between the two substrates (S1, S2) owing to the shrinkage of the thermoplastic-polymer-based interlayer sheet or sheets, especially so as to obtain flush seals.

13. :

The window as claimed in claim 1, characterized in that it constitutes a window for motor vehicles, aircraft or buildings.

14. :

The window as claimed in claim 1, characterized in that it constitutes a facade positioned in front of a vehicle instrument panel.

15. :

The window as claimed in claim 14, characterized in that it is used as an HUD (head-up display) screen.