Antiglare coating and articles

a technology of antiglare coating and antiglare film, applied in the direction of instruments, transportation and packaging, oxygen/ozone/oxide/hydroxide, etc., can solve the problems of modifying the surface characteristics, relativly high vacuum deposition technique cost, and high deposit cos

Inactive Publication Date: 2008-01-17
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The antiglare layer achieves reduced reflectance and increased durability, with a reflected haze of at least 150, transmission of at least 80%, and enhanced scratch resistance, while being environmentally friendly and cost-effective.

Problems solved by technology

However, they are relatively expensive to deposit, requiring the use of relatively high cost vacuum deposition techniques such as sputtering and precise manufacturing conditions, or very precise alkoxide solution dip coating techniques, with subsequent drying and firing.
There are numerous drawbacks in etching or otherwise modifying the surface characteristics of a substrate or coated substrate.
Such compounds create processing and disposal problems in view of increasingly stringent environmental laws.
Etching by non-chemical means, such as by sandblasting, necessitates additional and costly processing operations.

Method used

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  • Antiglare coating and articles
  • Antiglare coating and articles

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0066] A 3 kg batch of an antiglare coating composition was prepared as follows: In a vessel equipped with a stirring paddle, 34.06 weight % tetraethoxysilane (Dynasil A, Sivento Corp.) was added to 19.45% methyltriethoxysilane (Dynasilan MTES, Sivento Corp.). Stirring was then started and continued throughout the mixing process. 1.83% ethyl alcohol was then added followed by 12.73% of 2-propanol. After 5 minutes, a mixture of 11.31% deionized water and 0.11% sodium acetate trihydrate was added to the above. After 10 minutes, 0.11% concentrated nitric acid was added to the stirring mixture. After a 2-hour reaction time, 13.65% 2-propanol was added. The resultant partially hydrolyzed ethyl silicate solution was then allowed to age for a period of 2 days. After the aging period, 6.75% DP5540 (Nyacol Corp.) (30% 100 nm colloidal silica dispersed in ethylene glycol) was added at a flow rate of 15 ml / minute. The completed coating composition was kept stored under constant stirring. Befor...

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Abstract

The present invention relates to articles comprising an antiglare layer, coating compositions suitable for making antiglare layers, methods of making an antiglare article, and methods of making antiglare coating compositions. In some embodiments the article is a (e.g. illuminated) display article such as a touch screen. The antiglare layer comprises aggregate silica particle in a cured inorganic polymer matrix.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional of application Ser. No. 10 / 926690, filed Aug. 26, 2004, now allowed.BACKGROUND [0002] As described in U.S. Pat. No. 5,725,957, there are primarily two methods of reducing glare associated with surfaces of glass substrates. The first method involves depositing an “interference” coating stack on the glass substrate that controls glare by taking advantage of the optical interference within thin films. Such films usually have a thickness of about one-quarter or one-half the nominal wavelength of visible light, depending on the relative indexes of refraction of the coating and glass. The second method involves forming a light scattering, i.e. diffusing, means at the surface of the glass, usually either by altering the characteristics of the outermost surface of the glass substrate or via a diffuser coating on the glass substrate. [0003] Interference coatings reduce glare without reducing resolution. However, ...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): C09D183/06B05D5/06C01B13/14C09D183/04
CPCB82Y30/00Y10T428/25C03C17/007C03C17/009C03C17/3411C03C2203/22C03C2203/26C03C2203/27C03C2217/45C03C2217/475C03C2217/478C03C2217/732C03C2217/78C03C2218/111C03C2218/113G02B5/0226G02B5/0278G02B5/0294Y10T428/259C03C1/008C03C17/00C03C17/02
InventorRICHTER, PAUL J.CAIRNS, DARRAN R.BOTTARI, FRANK J.
Owner3M INNOVATIVE PROPERTIES CO