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Anti-reflective coated articles and method of making them

An anti-reflection coating, anti-reflection technology, applied in anti-reflection coatings, coatings, electrophoretic coatings, etc., can solve problems such as difficult wear and durability

Pending Publication Date: 2019-08-02
PPG IND OHIO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it was extremely difficult for this coating to achieve better wear durability and a Coefficient of Friction (COF) of ≤0.03 after testing over 6000 cycles using #0000 steel wool

Method used

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  • Anti-reflective coated articles and method of making them
  • Anti-reflective coated articles and method of making them
  • Anti-reflective coated articles and method of making them

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] In a clean container, mix 7.5 parts of tetraethylorthosilicate (98% purity, Sigma-Aldrich) with 1.5 parts of silane-functional acrylic polymer 1 , 2.25 parts of colloidal silica MT-ST (Nissan Chemical) and 3.6 parts of methyltrimethoxysilane (purchased from Evonik (Evonik)) were mixed. After mixing for 30 minutes, 6.8 parts of n-propanol (99.5% purity, Sigma-Aldrich), 2.75 parts of deionized water and 2.5 parts of HNO 3 A mixture of aqueous solutions (4.68 weight percent nitric acid in water) was added to the first mixture to hydrolyze the silanes. After 30 minutes of hydrolysis, 0.25 parts of aluminum acetylacetonate (99% purity, Sigma-Aldrich) and 0.1 part of BYK-306 (BYK USA) were added to the mixture. Finally, n-propanol was added in an amount of 72.75 parts to dilute the solution while mixing.

Embodiment 2

[0095] In a clean container, mix 7.5 parts of tetraethylorthosilicate (98% purity, Sigma-Aldrich) with 2.25 parts of silane-functional acrylic polymer 1 , 2.25 parts of colloidal silica MT-ST (Nissan Chemical) and 3.6 parts of methyltrimethoxysilane (Evonik) were mixed. After mixing for 30 minutes, 6.8 parts of n-propanol (99.5% purity, Sigma-Aldrich), 2.75 parts of deionized water and 2.5 parts of HNO 3 A mixture of aqueous solutions (4.68 weight percent nitric acid in water) was added to the first mixture to hydrolyze the silanes. After 30 minutes of hydrolysis, 0.25 parts of aluminum acetylacetonate (99% purity, Sigma-Aldrich) and 0.1 part of BYK-306 (BYK USA) were added to the mixture. Finally, n-propanol was added in an amount of 72 parts to dilute the solution while mixing.

Embodiment 3

[0097] In a clean container, mix 7.5 parts of tetraethylorthosilicate (98% purity, Sigma-Aldrich) with 3.0 parts of silane-functional acrylic polymer 1 , 2.25 parts of colloidal silica MT-ST (Nissan Chemical) and 3.6 parts of methyltrimethoxysilane (Evonik) were mixed. After mixing for 30 minutes, 6.8 parts of n-propanol (99.5% purity, Sigma-Aldrich), 2.75 parts of deionized water and 2.5 parts of HNO 3 A mixture of aqueous solutions (4.68 weight percent nitric acid in water) was added to the first mixture to hydrolyze the silanes. After 30 minutes of hydrolysis, 0.25 parts of aluminum acetylacetonate (99% purity, Sigma-Aldrich) and 0.1 part of BYK-306 (BYK USA) were added to the mixture. Finally, n-propanol was added in an amount of 71.25 parts to dilute the solution while mixing.

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Abstract

The present invention provides coated articles demonstrating anti-reflective properties. Exemplary coated articles comprise a substrate and an anti-reflective coating layer applied to at least one surface of the substrate. The anti-reflective coating layer is formed from an acidic sol-gel composition comprising: (a) tetraalkoxysilane; (b) alkyl trialkoxysilane; (c) a silane-functional acrylic polymer; (d) inorganic oxide particles; (e) a mineral acid; (f) water; and (g) a solvent. The coated article optionally further comprises an outermost anti-fouling coating layer applied to at least one surface of the anti-reflective coating layer.

Description

[0001] field of invention [0002] The present invention relates to coated articles including touch screen displays comprising a substrate coated with an antireflective coating. [0003] Background of the invention [0004] Information displays, such as touch screen displays, are appearing more and more frequently on interactive electronic devices. It is desirable to reduce the reflection of the screen caused by incident light to maximize the visibility of the display in different lighting environments. There are various known methods of reducing reflection from the surface of a transparent substrate. One exemplary method includes disposing an optical interference coating stack on a substrate that reduces reflection by employing optical interference within adjacent films. Such films typically have a thickness of about one-quarter or one-half the nominal wavelength of visible light, depending on the relative refractive index of the coating and substrate. Another method includ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/30C09D5/00C09D5/44C09D133/02C09D183/02C09D183/04C08G77/02G02B1/10G02B1/11C08J7/046
CPCC03C17/009C09D183/02C09D183/04C08G77/02G02B1/10G02B1/11C03C2217/445C03C2217/478G02B1/111C03C2217/732C08J7/046C08J7/0427C09D5/006C09D5/16C09D133/02C08K3/20C08K5/5415C03C17/30C08J2369/00C08J2333/12C09D133/00C08J2433/00C03C2218/112C03C2218/116C03C2218/113
Inventor 陆松伟邵际平J·D·巴兹尔G·撒哈I·G·施温德曼
Owner PPG IND OHIO INC