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Antireflective articles and methods of making the same

A product and transmittance technology, applied in the field of preparing nanostructured products, can solve problems such as restricting commercial feasibility, and achieve the effect of reducing reflectivity

Inactive Publication Date: 2014-09-17
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requirement for extreme vacuum conditions limits the commercial viability of the method

Method used

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  • Antireflective articles and methods of making the same
  • Antireflective articles and methods of making the same
  • Antireflective articles and methods of making the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0130] According to the method described in U.S. Patent No. 5,104,929 (Bilkadi), Nalco2327, SR444 (pentaerythritol triacrylate), A-174 (methacryloxypropyltrimethoxysilane) and Irgacure TM 184 (photoinitiator) A 40% by weight 20nm silica particle filled acrylic coating was prepared. The coating formulation was then diluted with isopropanol (IPA) to form a 50% by weight solution. Next the coating solution was coated on the primed 2 mil PET film. The solution was drawn into the coating mold with a syringe, the coating was dried by passing through an oven set at 120°C, and then cured with a UV light source. The resulting cured coating was about 4 microns thick. The samples were treated with oxygen plasma at different treatment times (30, 60, 90, 120, 150 and 180 seconds). The average % reflectance was measured and reported in Table 1. Samples 2-7 achieved a significant reduction in reflectance, with the 90 second treatment providing the best reflectance performance.

[0131] ...

example 2

[0134] SR295 (pentaerythritol tetraacrylate) (240 gm), SR238 (hexanediol diacrylate) (240 gm) and SR506 (isobornyl acrylate) (120 gm) were combined and mixed. 5 nm silica particles Nalco 2326 (400 gm) were charged into a 1 quart jar. 1-Methoxy-2-propanol (450 gm), 3-(methacryloxy)propyltrimethoxysilane (27.82 gm) and 5% Prostab 5128 in water (hindered amine nitrogen oxide inhibited agent) (0.23 gm) were mixed together and added to the colloidal dispersion with stirring. The jar was sealed and heated to 80°C for 16 hours. The surface modified silica dispersion (1166 gm), the resin blend of SR295, SR238 and SR506 (70 gm) and 5% Prostab in water (058 gm) were combined and mixed. Water and 1-methoxy-2-propanol were removed from the mixture by rotary evaporation. This gives SiO 2 Clear composition of resin mixture (184.6 gm). The weight percent of modified silica in the formulation was about 60% by weight. The preparation of the 20 nm silica particle concentrate was accomplis...

example 3

[0138] Will be POSS by MA0736 TM Molecule (from Hybrid Plastics Inc., Hattiesburg, MS), CN991 (aliphatic urethane acrylate from Sartomer, Exton, PA), CN2303 (alkoxylated polyfunctional acrylate oligomer from Sartomer), Tetrahydrofurfuryl Alcohol (TFHA) and Lucirin TM Coating solutions made from blends of TPO-L (a photoinitiator from BASF) were applied to a primed PET film and then cured by a UV light source. The coated film was then treated with oxygen plasma for 90 seconds. The % reflectance was measured and reported in Table 4 along with the formulation and treatment conditions.

[0139] Table 4: Reflectance results for plasma treated samples of Example 3

[0140]

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Abstract

The present invention provides a composite material having (a) a substrate having opposing first and second surfaces, the substrate having a transmittance in visible light of at least 90% and having a haze of less than 5%, (b) a nanostructured article comprising a matrix and a nanoscale dispersed phase and having a randomly nanostructured anisotropic surface; and (c) an optically clear adhesive disposed on said second surface of said substrate.

Description

[0001] Cross references to related patent applications [0002] This application claims U.S. Provisional Application Serial No. 61 / 141,517, filed December 30, 2008; U.S. Provisional Application Serial No. 61 / 157,683, filed March 5, 2009; and U.S. Provisional Application Serial No. Priority to Application Serial No. 61 / 234,782, each of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to nanostructured articles useful, for example, as antireflection articles. In another aspect, the invention relates to methods for making nanostructured articles. Background technique [0004] Whenever light passes from one medium to another, some portion of the light is reflected by the interface between the two media. For example, about 4-5% of light shining on a light transmissive plastic substrate is reflected at the top surface. [0005] A few different approaches have been taken to reduce the reflectance of polymeric mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/11C08J7/043C08J7/044C08J7/046C08J7/054C08J7/056
CPCG02B1/118G02B27/0006B32B37/02B32B38/0008B32B2551/00C08J7/123C08J2323/06C08J2433/08C08J2483/02G02B1/12G02B1/18Y10T428/254Y10T428/257Y10T428/258Y10T428/259Y10T428/2848B32B17/06G02B1/111C08J7/0423F24S70/60F24S70/10C08J7/043C08J7/054C08J7/046C08J7/044C08J7/056B32B2457/202G02B1/14B05D3/107B05D5/06B32B7/12B32B2255/26B32B2307/412B32B2307/42B32B2457/20C08J2367/02C08J2433/06
Inventor 莫塞斯·M·大卫安德鲁·K·哈策尔蒂莫西·J·赫布林克余大华张俊颖卡尔克·C·旺程铭
Owner 3M INNOVATIVE PROPERTIES CO
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