Antireflective articles and methods of making the same

Patent metadata

Field	Value
Publication number	US-9939557-B2
Application number	US-201615227349-A
Country	US
Kind code	B2
Filing date	Aug 3, 2016
Priority date	Dec 30, 2008
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A composite having (a) a substrate that has opposing first and second surfaces, the substrate being at least 90% transmissive in visible light and has less than 5% haze, (b) a nanostructured article including a matrix and a nanoscale dispersed phase and having a random nanostructured anisotropic surface; and (c) an optically clear adhesive disposed on the second surface of the substrate.

First claim

We claim:

1. A device comprising:
a substrate comprising at least one of an organic light emitting diode, a display, and a polarizer; and
a nanostructured article disposed on a first surface of the substrate, the nanostructured article comprising a matrix and a nanoscale dispersed phase, and having a major surface that is only an exposed etched random nanostructured anisotropic surface defined by nano-pillars or nano-columns comprising the matrix and nanoscale dispersed phase, wherein the nano-pillars and nano-columns are structural asperities having an aspect ratio of 1.5:1 or greater, and wherein the nanostructured article has a length along an x-direction, a width along a y-direction, and a thickness along a z-direction, wherein the nanoscale features comprise nano-pillars generally in the z-direction, wherein a majority of the nano-pillars are capped with physically exposed nanoscale dispersed phase from the nanoscale phase in the matrix.

2. The device of claim 1 , wherein the aspect ratio is 2:1 or greater.

3. The device of claim 1 , wherein the aspect ratio is 5:1 or greater.

4. A device preparable by attaching a layer or coating to the exposed etched random nanostructured anisotropic surface of the nanostructured article of the device of claim 1 .

5. The device of claim 4 , wherein the layer or coating is at least one of an ink, an encapsulant, an adhesive and a metal.

6. The device of claim 1 , wherein the matrix comprises a hardcoat comprising nanoparticles of SiO 2 , ZrO 2 and combinations thereof dispersed in a crosslinkable matrix comprising multi(meth)acrylate, polyester, epoxy, fluoropolymer, urethane, siloxane, or blends or copolymers thereof.

7. The device of claim 1 , wherein the nanoscale dispersed phase comprises nanoparticles of SiO 2 , ZrO 2 , TiO 2 , ZnO, Al 2 O 3 , calcium carbonate, magnesium silicate, indium tin oxide, antimony tin oxide, poly(tetrafluoroethylene), carbon and combinations thereof.

8. The device of claim 7 , wherein the nanoparticles having average particle size of less than about 100 nm.

9. The device of claim 8 , wherein the nanoparticles are surface modified.

10. The device of claim 1 , wherein the matrix comprises a polymer selected from the group consisting of polycarbonate, poly(meth)acrylate, polyester, nylon, siloxane, fluoropolymer, urethane, epoxy, cyclic olefin copolymer, triacetate cellulose, diacrylate cellulose or blends or copolymers thereof.

11. The device of claim 1 , wherein the matrix comprises an inorganic material selected from the group of silicon oxide and tungsten carbide.

12. The device of claim 1 , wherein the substrate comprises a cross-linkable material selected from multi(meth)acrylate, polyester, epoxy, fluoropolymer, urethane, siloxane, or blends or copolymers thereof.

13. The device of claim 1 , wherein the substrate comprises a polymer selected from the group consisting of polycarbonate, poly(meth)acrylate, polyester, nylon, siloxane, fluoropolymer, urethane, epoxy, cyclic olefin copolymer, triacetate cellulose, diacrylate cellulose or blends or copolymers thereof.

14. The device of claim 1 , wherein the matrix comprises an alloy or a solid solution.

15. The device of claim 1 , wherein the concentration of the dispersed phase within the matrix is between about 5 and 90 weight percent.

Assignees

• 3M Innovative Properties Co

Inventors

• David Moses M
• Hartzell Andrew K
• Hebrink Timothy J
• Yu Ta-Hua
• Zhang Jun-Ying
• Vang Kalc C
• Cheng Ming

Classifications

• C08J7/0423

  with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder · CPC title

• G02B1/12

  by surface treatment, e.g. by irradiation · CPC title

• B32B2551/00

  Optical elements · CPC title

• G02B1/118 Primary

  having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures · CPC title

• Y10T428/259

  Silicic material · CPC title