	US 12,007,658 B2
	Method for protecting a glass substrate coated with an electrochromic stack and method for producing an insulating glazing
Florent Martin, Paris (FR); Charline Lalande, Paris (FR); Bertrand Heurtefeu, Tremblay-en-France (FR); and Jean-Christophe Giron, Edina, MN (US)
Assigned to SAINT-GOBAIN GLASS FRANCE, Courbevoie (FR)
Appl. No. 17/436,428
Filed by SAINT-GOBAIN GLASS FRANCE, Courbevoie (FR)
PCT Filed Mar. 13, 2020, PCT No. PCT/EP2020/056988 § 371(c)(1), (2) Date Sep. 3, 2021, PCT Pub. No. WO2020/183019, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 1902628 (FR), filed on Mar. 14, 2019.
Prior Publication US 2022/0163862 A1, May 26, 2022
Int. Cl. G02F 1/153 (2006.01); C03C 17/42 (2006.01)

CPC G02F 1/1533 (2013.01) [C03C 17/42 (2013.01); C03C 2218/328 (2013.01); C03C 2218/355 (2013.01)]

22 Claims

1. A process for protecting a glass substrate coated with an electrochromic stack, comprising:

depositing a temporary protective layer on said electrochromic stack, said electrochromic stack including a layer of electrochromic material, said temporary protective layer comprising an organic polymeric matrix and having a thickness between 1 μm and 30 μm, and

removing said temporary protective layer by heat treatment at a temperature between 300° C. and 500° C. for a period of between 180 s and 240 s such that the temporary protective layer deposited on said glass substrate coated with said electrochromic stack is removed without tempering, bending or annealing said glass substrate during said heat treatment and without crystallizing said layer of electrochromic material during said heat treatment.