Coated substrate for solar control

Patent metadata

Field	Value
Publication number	US-10392292-B2
Application number	US-201615737617-A
Country	US
Kind code	B2
Filing date	Jun 14, 2016
Priority date	Jun 19, 2015
Publication date	Aug 27, 2019
Grant date	Aug 27, 2019

Abstract

The invention relates to substrates, in particular to transparent substrates, optionally colored, coated with an infrared-reflecting layer and capable of being used as glazing in buildings or in vehicles. Said coated substrates are made up of the combination of a glass substrate in which the composition has a redox of less than 15%, characterized by infrared reflection RIRV so that RIRV≥1.087*TLV, wherein TLV is the light transmission of the glass, and an infrared reflecting layer characterized by light transmission TLC so that TLC≥1.3*TIRC, wherein TIRC is the infrared transmission of the layer.

First claim

The invention claimed is:

1. A transparent substrate coated with an infrared-reflecting layer, wherein the substrate is a glass comprising a composition which has a redox lower than 15%, characterized by an infrared reflection RIR V between 780 and 2500 nm such that RIR V ≥1.087*TL V , TL V being the light transmission of the glass between 380 and 780 nm, and in that the infrared-reflecting layer is characterized by a light transmission TL C between 380 and 780 nm such that TL C ≥1.3*TIR C , TIR C being the infrared transmission of the layer between 780 and 2500 nm.

2. The coated substrate as claimed in claim 1 , wherein the substrate is a glass characterized by an infrared reflection RIR V such that RIR V ≥1.087*TL V +5.

3. The coated substrate as claimed in claim 1 , characterized by an infrared reflection RIR V such that RIR V ≥0.510*TL V +53.

4. The coated substrate as claimed in claim 1 , wherein the glass of the substrate has a composition that comprises, in a content expressed in percentage by total weight of glass:

Total iron (expressed in the form of Fe 2 O 3 )
   0.002-0.06%; and

Cr 2 O 3
0.0001-0.06%.

5. The coated substrate as claimed in claim 1 , wherein the glass of the substrate has a composition that comprises, in a content expressed in percentages by total weight of glass:

Total iron (expressed in the form of Fe 2 O 3 )
0.002-0.06%;  

Cr 2 O 3
0.0015-1%;

Co
0.0001-1%.

6. The coated substrate as claimed in claim 1 , wherein the glass of the substrate has a composition that comprises, in a content expressed in percentages by total weight of glass:

Total iron (expressed in the form of Fe 2 O 3 )
   0.02-1%;

Cr 2 O 3
0.002-0.5%;

Co
0.0001-0.5%.  

7. The coated substrate as claimed in claim 1 , wherein the glass of the substrate has a composition that comprises, in a content expressed in percentages by total weight of glass:

Total iron (expressed in the form of Fe 2 O 3 )
  0.002-1%;

Cr 2 O 3
0.0010-0.5%;

Co
0.0001-0.5%;

Se
0.0003-0.5%.

8. The coated substrate as claimed in claim 1 , wherein the infrared-reflecting layer is characterized by an infrared reflection RIR C of value comprised between or equal to 0.5*(1−AIR C ) and 0.86*(1−AIR C ).

9. The coated substrate as claimed in claim 1 , wherein the infrared-reflecting layer is characterized by an infrared reflection RIR C of value higher than 0.86*(1−AIR C ) and lower than or equal to 0.97*(1−AIR C ).

10. The coated substrate as claimed in claim 1 , wherein the infrared-reflecting layer is characterized by an infrared reflection RIR C of value higher than 0.97*(1−AIR C ).

11. The coated substrate as claimed in claim 1 , wherein the infrared-reflecting layer is a multilayer stack comprising n functional layers based on an infrared-reflecting material, with n≥1, and n+1 dielectric coatings such that each functional layer is flanked by dielectric coatings.

12. The coated substrate as claimed in claim 11 , wherein the functional layers of the infrared-reflecting layer are silver-based.

Assignees

• Agc Glass Europe

Inventors

• Lambricht Thomas
• Depauw Jean-Michel
• Marenne Ingrid
• Boland Francois
• Dogimont Audrey
• Degand Aline
• Hevesi Kadosa

Classifications

• C03C17/3652

  the coating stack containing at least one sacrificial layer to protect the metal from oxidation · CPC title

• C03C17/3639

  Multilayers containing at least two functional metal layers · CPC title

• C03C17/36

  at least one coating being a metal · CPC title

• C03C4/0092

  for glass with improved high visible transmittance, e.g. extra-clear glass · CPC title

• C03C4/02

  for coloured glass · CPC title