US 12,030,298 B2
Laminated glazing comprising a peripheral stepped element made of polymer material having a required maximum permeability to water vapor
Thomas Tondu, Saint-Martin d'Abbat (FR); and Didier Tellier, Saint-Pere sur Loire (FR)
Assigned to SAINT-GOBAIN GLASS FRANCE, Courbevoie (FR)
Appl. No. 17/296,409
Filed by SAINT-GOBAIN GLASS FRANCE, Courbevoie (FR)
PCT Filed Dec. 3, 2019, PCT No. PCT/FR2019/052906
§ 371(c)(1), (2) Date May 24, 2021,
PCT Pub. No. WO2020/115425, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 1872291 (FR), filed on Dec. 4, 2018.
Prior Publication US 2022/0024186 A1, Jan. 27, 2022
Int. Cl. B32B 15/04 (2006.01); B32B 3/02 (2006.01); B32B 7/12 (2006.01); B32B 17/06 (2006.01); B32B 17/10 (2006.01)
CPC B32B 7/12 (2013.01) [B32B 3/02 (2013.01); B32B 17/10 (2013.01); B32B 17/10036 (2013.01); B32B 17/10045 (2013.01); B32B 17/10302 (2013.01); B32B 17/10614 (2013.01); B32B 17/10761 (2013.01); B32B 17/1077 (2013.01); B32B 17/10788 (2013.01); B32B 17/10807 (2013.01); B32B 2307/7246 (2013.01); B32B 2605/006 (2013.01); B32B 2605/18 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A laminated glazing comprising at least a first glass sheet constituting an external face of the laminated glazing, connected to a second glass sheet by a first interlayer adhesive layer, in which an edge of the first glass sheet is set back with respect to an edge of the second glass sheet, a peripheral part of a free surface of the first glass sheet, an edge face of the first glass sheet, an edge face of the first interlayer adhesive layer and a part of a surface of the second glass sheet extending beyond the first glass sheet describing a continuous stepped contour which is covered with a stepped element with interposition of an adhesive such that the stepped element and said adhesive both cover at least in part said peripheral part of the free surface of the first glass sheet, said edge face of the first glass sheet, said edge face of the first interlayer adhesive layer and said part of a surface of the second glass sheet extending beyond the first glass sheet, wherein the stepped element is made of polymer material which optionally contains reinforcing fillers, wherein the stepped element has a thickness of at most 450 μm and the adhesive has a thickness of at most 200 μm, and wherein the stepped element exhibits a permeability to water vapor at most equal to 5 g/m2/day.