Solar light management

Patent metadata

Field	Value
Publication number	US-2016170102-A1
Application number	US-201414905400-A
Country	US
Kind code	A1
Filing date	Jul 8, 2014
Priority date	Jul 18, 2013
Publication date	Jun 16, 2016
Grant date	—

Abstract

A translucent construction element comprising a layer of translucent substrate, which contains a surface structured with nanoplanes of inclined angle relative to the substrate plane, and coated with an interrupted metallic layer covering at least a part of said nanoplanes, is characterized by a high density of interruptions in the metallic layer of low thickness; the periodicity of interruptions in the metallic layer generally is from the range 50 to 1000 nm and the thickness of the metallic layer typically is from the range 1 to 50 nm. The construction element may be integrated, for example, into windows, plastic films or sheets or glazings, especially for the purpose of light management.

First claim

1 .- 16 . (canceled)

17 . A translucent construction element comprising a layer of translucent substrate, which contains a surface structured with nanoplanes of inclined angle relative to the substrate plane, and coated with an interrupted metallic layer covering at least a part of said nanoplanes, characterized in that the thickness of the metallic layer is from the range 1 to 50 nm and the periodicity of interruptions in the metallic layer is from the range 50 to 1000 nm

18 . A translucent construction element comprising a layer of translucent substrate, which contains a surface structured with nanoplanes of inclined angle relative to the substrate plane, and coated with an interrupted metallic layer covering at least a part of said nanoplanes, characterized in that the periodicity of interruptions in the metallic layer is from the range 50 to less than 500 nm, and the thickness of the metallic layer is from the range 1 to 75 nm.

19 . The translucent construction element of claim 17 , wherein the element is a facade element, or is transparent and is a window pane.

20 . The translucent construction element of claim 17 , wherein the nanoplanes on the substrate surface are provided in form of a grating of depth from the range 30 to 1000 nm, which grating is of sinusoidal, trapezoidal, triangular or rectangular cross section.

21 . The translucent construction element of claim 20 , wherein the element is integrated in a building or vehicle with its grating lines aligned horizontally.

22 . A device comprising an interrupted metallic layer on the surface of a transparent substrate, characterized in that the surface is structured with nanoplanes of inclined angle relative to the substrate plane and carrying a metal coating on at least a part of said nanoplanes, where the periodicity of interruptions in the metallic layer is from the range 50 to 1000 nm and the thickness of the metal coating is from the range 1 to 50 nm.

23 . The device of claim 22 , wherein the inclined angle relative to the substrate plane is from the range 10 to 90°.

24 . Device of claim 22 , wherein the nanoplanes of inclined angle relative to the substrate plane are provided in form of a grating of periodicity from the range 50 to 1000 nm and of depth from the range 30 to 1000 nm, which grating is of sinusoidal, trapezoidal, triangular or rectangular cross section.

25 . The translucent construction element according to claim 17 , wherein the metallic layer is covered by a transparent medium in form of an encapsulating layer.

26 . The translucent construction element according to claim 17 , comprising between substrate and metallic layer and/or between the metallic layer and encapsulating layer one or more further layers selected from underlayers of enhancement materials and cover layers.

27 . The translucent construction element according to claim 17 , wherein the metallic layer contains a metal selected from the group consisting of silver, aluminum, gold, copper, and platinum.

28 . The translucent construction element according to claim 17 , wherein the substrate, an optional encapsulating layer(s) and an optional cover layer(s) are glass or polymeric materials selected from the group consisting of thermoplastic polymers and UV-cured polymers such as acrylic polymers, polycarbonates, polyesters, polyvinylbutyrate, polyolefines, polyetherimides, polyetherketones, polyethylene naphthalates, polyimides, polystyrenes, polyoxymethylene, polyvinylchloride, low refractive index composite materials, hybrid polymers, radiation-curable compositions, and combinations thereof.

29 . A window pane comprising the translucent construction element according to claim 17 , wherein the substrate comprises a flat or bent polymer film or sheet, or glass sheet, or a polymer film or sheet and a glass sheet.

30 . The window pane of claim 29 comprising a glass sheet carrying the element including the interrupted metallic layer on at least a part of its surface, wherein the metallic structures are directly attached to the glass surface or are embedded in a transparent medium comprising the substrate and the encapsulating medium, where substrate and the encapsulating medium are selected from the group consisting of thermoplastic polymers, UV-cured polymers such as acrylic polymers, polycarbonates, polyesters, polyvinylbutyrate, polyolefines, polyetherimides, polyetherketones, polyethylene naphthalates, polyimides, polystyrenes, polyoxymethylene, polyvinylchloride, low refractive index composite materials, hybrid polymers, radiation-curable compositions, and combinations thereof.

31 . A method for reducing the transmission of solar light through a transparent element, which method comprises integrating the translucent construction element according to claim 17 into said transparent element.

32 . A method for seasonal heat and/or light management, comprising incorporating the translucent construction element according to claim 17 into a window into the interior space of a building or vehicle.

Assignees

• Basf Se

Inventors

• Hafner Andreas
• Von Muehlenen Adrian
• Enger Olivier
• Gallinet Benjamin
• Ferrini Rolando
• Marjanovic Nenad
• Stalder Martin
• Luetolf Fabian
• Basset Guillaume

Classifications

• E06B2009/2417

  Light path control; means to control reflection · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• G02B5/203

  having holographic or diffractive elements (diffraction gratings per se G02B5/18; holographic elements per se G02B5/32; generating the spectrum using diffraction elements G01J3/18) · CPC title

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• G02B5/1809 Primary

  with pitch less than or comparable to the wavelength · CPC title