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Polarized and abrasion-resistant optical article and process for manufacturing thereof

An anti-wear and polarization technology, applied in chemical instruments and methods, optics, optical components, etc., can solve problems such as cost-consuming, demanding technical requirements, and difficult application

Active Publication Date: 2007-04-18
ESSILOR INT CIE GEN DOPTIQUE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Binder addition is a cost-intensive and technically demanding step on an industrial scale
Moreover, this technique is difficult to apply to cured surfaces and usually requires a thermal formation step with a polarizing film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] A polarizing layer is applied to the ORMA lens with a center thickness of 2 mm.

[0067] 1) Fabrication of linear photopolymerization layer

[0068] The glass surface is activated by plasma treatment under the following general conditions: power 600W, 3 minutes, gaseous medium is a mixture of oxygen and argon (50:50). A solution containing 2% by weight of an acrylic acid polymer containing a cinnamic acid derivative of the species to be determined was prepared in methyl ethyl ketone. The solution was set up by spin coating onto the activated substrate at a rotation speed of 2000 rpm within 1 minute. The solvent was evaporated by heating on a hot plate at 130°C for 20 minutes. A photo-alignment layer with a thickness of 50 nm was obtained. The layer was exposed to polarized UV light for 30 seconds at a dose of 100 mJ / cm 2 .

[0069] 2) Fabrication of liquid crystal and two-color dye layers.

[0070] A solution containing liquid crystal molecules and dichroic dyes w...

Embodiment 2

[0115] A polarizing layer is applied on the lens made of polythiourea material. A preferred polythiol is 1,2-

[0116] Bis-(2'-thiolethylthio)-3-thiolpropane (MDO). A preferred isocyanate is m-xylylene diisocyanate.

[0117] 1) Fabrication of linear photopolymerization layer

[0118] High-index lenses are cleaned with ultrasonic waves at 55°C in NaOH (5%) solution. Then soak in water and deionized water (isopropanol if necessary). In a 10:1 mixed solvent of methyl ethyl ketone and cyclopentanone, a solution of an acrylic acid polymer containing a cinnamic acid derivative to be determined was prepared in an amount of 2% by weight. The solution was deposited on the substrate by spin coating. Spin at 500 rpm for 3 seconds and then at 2500 rpm for 20 seconds. The solvent was evaporated by heating at 100°C for 20 minutes. A photoalignment layer with a thickness of 150 nm was obtained. The layer is dosed at 100J / cm 2 Exposure to polarized UV light.

[0119] 2) Fabrication ...

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Abstract

The invention relates to polarized and abrasion-resistant article comprising: a) a polarized layer applied to a substrate, said polarized layer including an oriented liquid crystal polymer layer (LCP) including at least one dichroic dye, said liquid crystal layer being coated on a photo-orientation layer, and b) an abrasion-resistant coating applied to the polarized layer on said substrate. The invention also relates to a process for manufacturing said articles, and to the use of the above-mentioned article for the manufacturing of optic glasses or lenses.

Description

technical field [0001] The present invention relates to a polarized anti-wear article and a method of forming a polarized anti-wear coating on a suitable substrate, such as inorganic or organic glass. Background technique [0002] The application of anti-wear coatings to substrates has been described in the prior art. For example, US Pat. No. 4,211,823 or EP 0 614 957 disclose anti-wear coating compositions comprising hydrolyzed silanes and aluminum compounds, as well as anti-wear and impact-resistant coated articles. US 5,316,791, US 6,503,631 and US 6,489,028 disclose combined two-layer impact and anti-wear systems comprising respectively a base coat of cured polyurethane or poly(meth)acrylic latex or latex containing butadiene units, as previously described A wear coat is applied to this base coat. The latex may also be a photochromic latex as described in EP 1 161 512 or FR 2811 322 . This kind of latex can improve the impact resistance of the coated product, and can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30C09K19/38C09K19/60
CPCC09K19/60C09K19/38C09K2219/03G02B5/3016G02B5/30
Inventor 克洛迪娜·比韦西尔韦特·迈索尼耶托马斯·巴舍尔斯诺埃米·莱萨特
Owner ESSILOR INT CIE GEN DOPTIQUE