Functionalized substrate

Patent metadata

Field	Value
Publication number	US-2017190610-A1
Application number	US-201615393570-A
Country	US
Kind code	A1
Filing date	Dec 29, 2016
Priority date	Dec 31, 2015
Publication date	Jul 6, 2017
Grant date	—

Abstract

The present invention relates to a functionalized substrate comprising a substrate ( 10 ) and a near infrared absorbing coating ( 20 ), wherein said near infrared absorbing coating ( 20 ) comprises near infrared absorbing nanoparticles ( 21 ) comprising indium, tin, zinc, antimony, aluminum, tungsten or mixtures thereof. In an embodiment, the near infrared absorbing coating ( 20 ) further includes an inorganic matrix ( 22, 23, 24 ).

First claim

1 . A functionalized substrate comprising a substrate and a near infrared absorbing coating, wherein said near infrared absorbing coating comprises near infrared absorbing nanoparticles comprising indium, tin, zinc, antimony, aluminum, tungsten or mixtures thereof.

2 . The functionalized substrate according to claim 1 , wherein the near infrared absorbing nanoparticles comprise a transparent conductive oxide selected from the group consisting of indium tin oxide, indium zinc oxide, antimony tin oxide, tin zinc oxide, fluorine-doped tin oxide, aluminum-doped zinc oxide, gallium-doped zinc oxide, and optionally doped tungsten oxide.

3 . The functionalized substrate according to claim 1 , wherein the near infrared absorbing nanoparticles have a core-shell structure with a metallic core and an at least partially oxidized shell.

4 . The functionalized substrate according to claim 2 , wherein the transparent conductive oxide is indium tin oxide.

5 . The functionalized substrate according to claim 1 , wherein the near infrared absorbing nanoparticles have a diameter from 0.2 to 150 nm.

6 . The functionalized substrate according to claim 1 , wherein the near infrared absorbing nanoparticles are spaced apart from each other.

7 . The functionalized substrate according to claim 1 , wherein the near infrared absorbing coating comprises near infrared absorbing nanoparticles dispersed within an inorganic encapsulating layer.

8 . The functionalized substrate according to claim 1 , wherein the near infrared absorbing coating comprises an inorganic underlayer, a near infrared absorbing nanoparticles layer directly on said inorganic underlayer, and an overlayer directly on said near infrared absorbing nanoparticles layer.

9 . The functionalized substrate according to claim 1 , wherein the near infrared absorbing nanoparticles have an equivalent theoretical layer thickness from 0.5 nm to 70 nm.

10 . The functionalized substrate according to claim 1 , wherein said near infrared absorbing coating further comprises an inorganic matrix based on oxide materials, nitride materials, or oxynitride materials.

11 . The functionalized substrate according to claim 1 , wherein the near infrared absorbing coating comprises a first near infrared absorbing nanoparticles layer, a first inorganic overlayer directly on said first near infrared absorbing nanoparticles layer, a second near infrared absorbing nanoparticles layer directly on said first inorganic overlayer, and a second inorganic overlayer directly on said second near infrared absorbing nanoparticles layer

12 . The functionalized substrate according to claim 1 , wherein the substrate comprises a glass.

13 . A window film comprising the functionalized substrate according to claim 1 , wherein the substrate is a flexible polymer substrate.

14 . A glazing comprising the window film according to claim 13 .

15 . A process for manufacturing a functionalized substrate comprising:
providing a substrate; and depositing near infrared absorbing nanoparticles by magnetron sputtering on said substrate.

16 . The process according to claim 15 , wherein depositing near infrared absorbing nanoparticles comprises:
depositing an inorganic underlayer on said substrate; depositing an near infrared absorbing nanoparticles layer directly on said inorganic underlayer; and depositing an inorganic overlayer directly on said near infrared absorbing nanoparticles layer.

17 . The process according to claim 15 , wherein depositing near infrared absorbing nanoparticles comprises depositing simultaneously near infrared absorbing nanoparticles and an inorganic encapsulating layer on said substrate.

18 . The process according to claim 15 , wherein depositing near infrared absorbing nanoparticles comprises:
depositing metallic clusters; and oxidizing said metallic clusters so as to obtain near infrared absorbing nanoparticles.

19 . The process according to claim 18 , wherein said metallic clusters are based on indium, tin, zinc, antimony, aluminum, tungsten or alloys thereof.

20 . The process according to claim 19 , wherein said process comprises an annealing step.

Assignees

• Saint Gobain Performance Plastics Corp

Inventors

• Joseph Camille
• Singh Laura J
• Bon Saint Come Yemima Anne
• Leyder Charles

Classifications

• C03C17/007 Primary

  containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase · CPC title

• C03C2217/48

  having a specific function · CPC title

• C23C14/205

  by cathodic sputtering · CPC title

• C23C14/10

  Glass or silica · CPC title

• C23C14/35

  by application of a magnetic field, e.g. magnetron sputtering {(C23C14/3457 takes precedence)} · CPC title