# US 9,752,799 B2 · Solar energy reflector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,799 B2 - Document ID: US9752799B2 - Status: Granted - Kind: B2 - Application number: 15/074,594 - Filed: 2016-03-18 - Published: 2016-09-22 - Granted: 2017-09-05 - Earliest claimed: 2007-12-21 - Assignees: Agc Glass Europe - Applicants: Agc Glass Europe - Inventors: Lionel Ventelon; Olivier Bouesnard; Bruno Cosijns - Web page: https://patentgrep.com/patent/US9752799B2 ## CPC - F24S 23/82: {characterised by the material or the construction of the reflector} - F24S 23/77: with flat reflective plates - F24S 70/30: Auxiliary coatings, e.g. anti-reflective coatings - F24S 80/20: Working fluids specially adapted for solar heat collectors - G02B 5/0808: {having a single reflecting layer (G02B5/0883, G02B5/0891 take precedence)} - Y02E 10/40: Solar thermal energy, e.g. solar towers - F24S: SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS (for producing mechanical power from solar energy F03G6/00) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A solar energy reflector (1) comprises a mirror (5) with no copper layer laminated to a supporting sheet (7) by means of a bonding material (6). The edges of the mirror (5) are provided, at least on a portion forming the major part of their height and closest to the metallic sheet, with an edge protection (8) made of a material comprising silicone, polyurethane and/or acrylic and the material forming the edge protection (8) is different from the bonding material (6). ## Claims ### Claim 1 A solar energy reflector, comprising: a mirror that comprises a glass substrate coated with a layer of silver and at least one layer of paint with no copper layer present between the silver layer and the paint layer, and a supporting sheet, wherein said mirror is laminated to said supporting sheet with a bonding material, wherein the edges of the mirror have, at least on a portion forming a major part of their height and closest to the supporting sheet, an edge protection member comprising at least one material selected from the group consisting of silicone, polyurethane, and acrylic, wherein the material of the edge protection member is different from the bonding material, and wherein the glass substrate is coated with the layer of silver by contacting the glass substrate with a solution comprising a silver salt. ### Claim 2 (depends on 1) A solar energy reflector according to claim 1, wherein the material forming the edge protection consists essentially of silicone. ### Claim 3 (depends on 1) A solar energy reflector according to claim 1, wherein the mirror is laminated to the supporting sheet so that the at least one layer of paint is facing the supporting sheet. ### Claim 4 (depends on 1) A solar energy reflector according to claim 1, wherein the bonding material comprises an acrylic resin. ### Claim 5 (depends on 4) A solar energy reflector according to claim 4, wherein the bonding material comprises an acrylic pressure-sensitive adhesive. ### Claim 6 (depends on 1) A solar energy reflector according to claim 1, wherein the bonding material comprises at least one film selected from the group consisting of an acetate-based polymer film, a PVB film, an ionomer-based film, and a TPU film. ### Claim 7 (depends on 1) A solar energy reflector according to claim 1, wherein the edges of the mirror are provided substantially on their total height with the edge protection. ### Claim 8 (depends on 1) A solar energy reflector according to claim 1, which has an average edge corrosion of less than 50 μm after having been subjected to a 15 days CASS test. ### Claim 9 (depends on 1) A method for manufacturing a solar energy reflector according to claim 1, the method comprising: a) laminating a glass substrate, a silver coating layer provided at a surface of the glass substrate and at least one layer of paint covering the silver coating layer to a supporting sheet with a bonding material, to form the mirror that has no copper layer present between the silver layer and the paint layer; and b) applying to the edges of the mirror, at least against the glass/silver and silver/paint interfaces, an edge protection member that comprises a material which is different from the bonding material and which, at the time it is applied on the edges of the mirror, has a viscosity defined by at least one of the following: i extrusion rate greater than or equal to 50 g/min when measured according to method A as herein defined ii extrusion rate greater than or equal to 5 g/min when measured according to method B as herein defined iii viscosity less than or equal to 800 Pa·s when measured according to method C as herein defined iv melt flow index greater than or equal to 30 ml/10 min when measured according to method D as herein defined v extrusion rate greater than or equal to 60 g/min when measured according to method E as herein defined. ### Claim 10 (depends on 9) A method according to claim 9, wherein the bonding material has a viscosity, at the time it is applied on the edges of the mirror, defined by at least one of the following: i extrusion rate greater than or equal to 100 g/min when measured according to method A as herein defined ii extrusion rate greater than or equal to 10 g/min when measured according to method B as herein defined iii viscosity less than or equal to 700 Pas when measured according to method C as herein defined iv melt flow index greater than or equal to 50 ml/10 min when measured according to method D as herein defined v extrusion rate greater than or equal to 180 g/min when measured according to method E as herein defined. ### Claim 11 (depends on 9) A method according to claim 9, wherein the edge protection is applied to the edges of the mirror on at least a portion forming the major part of their height. ### Claim 12 (depends on 9) A method according to claim 9, wherein the edge protection is applied by extrusion. ### Claim 13 (depends on 1) A solar energy reflector according to claim 1, wherein a thickness of the mirror is greater than 0.9 mm. ### Claim 14 (depends on 1) A solar energy reflector according to claim 1, wherein a thickness of the mirror is greater than 1.1 mm. ### Claim 15 (depends on 1) A solar energy reflector according to claim 1, wherein a thickness of the mirror is from greater than 0.9 mm to less than 2.0 mm. ### Claim 16 (depends on 1) A solar energy reflector according to claim 1, wherein a thickness of the mirror is from greater than 1.1 mm to less than 1.5 mm. ### Claim 17 (depends on 1) A solar energy reflector according to claim 1, wherein a thickness of the layer of silver is from 80 nm to less than 200 nm. ### Claim 18 (depends on 1) A solar energy reflector according to claim 1, wherein a thickness of the layer of silver is from 100 nm to less than 180 nm. ### Claim 19 (depends on 1) A solar energy reflector according to claim 1, wherein a thickness of the layer of silver is from 120 nm to less than 180 nm. ### Claim 20 (depends on 1) A solar energy reflector according to claim 1, wherein a thickness of the layer of silver is from 140 nm to less than 180 nm.