OPTICAL FILM EXHIBITING IMPROVED LIGHT TO SOLAR GAIN HEAT RATIO

• US 20150183301A1
• Filed: 12/18/2014
• Published: 07/02/2015
• Est. Priority Date: 12/30/2013
• Status: Active Grant

• Current Assignee: Saint-Gobain Performance Plastics Corporation (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Performance Plastics Corporation (Compagnie De Saint-Gobain)
• Inventors: Diguet, Antoine, Leyder, Charles, Lienhart, Fabien
• Granted Patent: US 10,081,570 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B32B 15/00 Layered products comprising a layer of metal
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3613 Coatings of type glass/inorganic compound/metal/inorganic compound/metal/other
• CPC Class Codes: C03C 17/3644 the metal being silver
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: C08J 2301/12 Cellulose acetate
• CPC Class Codes: C08J 2327/12 containing fluorine atoms
• CPC Class Codes: C08J 2333/06 of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
• CPC Class Codes: C08J 2353/02 of vinyl aromatic monomers and conjugated dienes
• CPC Class Codes: C08J 2367/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds; C08J2367/06 takes precedence
• CPC Class Codes: C08J 2369/00 Characterised by the use of polycarbonates; Derivatives of polycarbonates
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 7/044 Forming conductive coatings; Forming coatings having anti-static properties
• CPC Class Codes: C08J 7/06 with compositions not containing macromolecular substances
• CPC Class Codes: G02B 5/282 reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection
• CPC Class Codes: Y10T 428/12549 Adjacent to each other

Abstract

The present disclosure is directed to optically transparent and IR reflecting films having a metal oxide based composite layer which can synergistically improve the optical properties, solar properties, and production speed of the whole composite.

Claims

1. A composite film comprising a metal oxide based composite layer comprising a niobium oxide layer and a metal oxide layer adapted to improve the uniformity of a metal based layer, and wherein the composite film comprises a silver based layer, wherein the composite film has a visual light transmittance of at least 65%.

2. The composite of claim 1, wherein the composite comprises one or more zinc oxide based layers comprising AZO.

3. The composite of claim 1, wherein the composite comprises a zinc oxide based layer for every silver based layer.

4. The composite of claim 1, wherein the composite comprises one or more zinc oxide based layers disposed adjacent to a metal based layer.

5. The composite of claim 1, wherein the composite comprises a titanium oxide based layer disposed adjacent to a substrate layer.

7. The composite of claim 1, wherein the composite comprises a first metal based layer and a second metal based layer, and wherein the first metal based layer and the second metal based layer are in direct contact with one of the one or more silver based layer.

8. The composite of claim 1, wherein the composite comprises a first silver based layer, a second silver based layer, a third metal based layer and a fourth metal based layer, and wherein the third metal based layer and the fourth metal based layer are in direct contact with the second silver based layer.

9. The composite of claim 1, wherein the composite comprises one or more zinc oxide based layers comprising AZO.

10. The composite of claim 1, wherein the one more metal oxide based composite layers comprise a metal oxide layer comprising niobium oxide and a metal oxide layer comprising zinc oxide in the same metal oxide based composite layer.

11. The composite of claim 1, wherein the one more metal oxide based composite layers comprise a metal oxide layer comprising titanium oxide and a metal oxide layer comprising zinc oxide in the same metal oxide based composite layer.

12. The composite of claim 1, wherein the one more metal oxide based composite layers comprise a metal oxide layer comprising niobium oxide and a metal oxide layer comprising titanium oxide in the same metal oxide based composite layer.

13. The composite of claim 1, wherein the one more metal oxide based composite layers comprise a metal oxide layer comprising niobium oxide and a metal oxide layer comprising titanium oxide in the same metal oxide based composite layer, and wherein the thickness of the titanium oxide layer is less than the thickness of the niobium oxide layer in the same metal oxide based composite layer.

14. The composite of claim 1, wherein the one more metal oxide based composite layers comprise a metal oxide layer comprising a zinc oxide and a metal oxide layer comprising titanium oxide or niobium oxide in the same metal oxide based composite layer, and wherein the thickness of the zinc oxide layer is less than the thickness of the niobium oxide or titanium oxide layer in the same metal oxide based composite layer.

15. The composite of claim 1, wherein the composite comprises a zinc oxide based layer for every silver based layer.

16. The composite of claim 1, wherein the composite comprises one or more zinc oxide based layers disposed adjacent to a metal based layer.

17. The composite of claim 1, wherein the composite comprises a titanium oxide based layer disposed adjacent to a substrate layer.

6. A composite film comprising a metal oxide based composite layer, wherein the metal oxide based composite layer comprises at least two distinct layers of different metal oxides.

18. A method of forming a composite film comprising:

a. providing a transparent substrate layer comprising a polymer;

b. forming one or more metal oxide based layers by sputtering;

c. forming one or more metal based layers;

d. forming one or more silver based layers;

e. wherein, forming the one or more metal oxide based layers by sputtering has a deposition rate of greater than 1.5 nm·

m²·

min<sup>−

1</sup>·

kW<sup>−

1</sup> on a single rotative ceramic target.

19. The method of claim 18, wherein the composite comprises one or more zinc oxide based layers comprising AZO.

20. The method of claim 18, wherein the one more metal oxide based composite layers comprise a metal oxide layer comprising niobium oxide and a metal oxide layer comprising titanium oxide in the same metal oxide based composite layer, and wherein the thickness of the titanium oxide layer is less than the thickness of the niobium oxide layer in the same metal oxide based composite layer.