Coating and optical element

A coating and mixture technology, applied in optical components, coatings, optics, etc., can solve the problems of poor adhesion between coatings and substrates, low wear resistance and hardness, achieve high adhesion, increase toughness, prevent warping effect

Active Publication Date: 2011-05-25
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the technical problems of poor adhesion between the coating and the substrate, low wear resistance and low hardness in the prior art

Method used

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  • Coating and optical element
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  • Coating and optical element

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The preparation method of the optical element provided by the present invention can adopt various coating methods commonly used in the prior art to form a coating on a transparent substrate, for example, the coating composition can be coated on a transparent substrate by various common methods surface, and then cured to obtain the coating of the present invention on the surface of the transparent substrate, thereby preparing the optical element of the present invention. In order to ensure that the coating forms a suitable thickness on the surface of the transparent substrate, the amount of the coating composition is 0.05-0.5g / cm 2 .

[0037] In order to improve the adhesion between the coating and the transparent substrate, before the surface of the transparent substrate is coated with the coating composition, the transparent substrate can also be roughened with chromic anhydride to roughen the surface of the transparent substrate, thereby improving the adhesion between...

Embodiment 1

[0040] 1) Put the 70×40×1.5mm PC board into the chromic anhydride roughening solution, soak for 10 minutes at 60°C; transfer to 10wt% oxalic acid solution, soak for 5min at 60°C; transfer to 10wt% sodium hydroxide solution Soak in water for 30s, rinse with clean water and dry. Chromic anhydride roughening liquid: 160ml pure water, 130ml concentrated sulfuric acid, 28g potassium dichromate.

[0041] 2) Take 18g of methyltriethoxysilane, 2g of dimethyldiethoxysilane, 19g of deionized water, 1.5g of itaconic acid and 8.4g of isopropanol, stir and hydrolyze for 2 hours; add dropwise 30g of KH560 and 14.5 g deionized water mixture, react at 40°C for 2h; add 18g of silica sol (Sunardi acidic silica sol, average particle size 15nm), 0.4g of N,N-dimethylbenzylamine, 0.4g of FC-430 and mix for 12h , to obtain a coating composition.

[0042] 3) Apply the coating composition prepared in the brushing step 2) to one side of the transparent substrate after step 1), and the amount of brush...

Embodiment 2

[0044] Adopt the same method as embodiment 1 to prepare the optical element, the difference is that,

[0045] In step 2), take 19g methyltriethoxysilane, 1g dimethyldiethoxysilane, 21g deionized water, 1.5g itaconic acid and 15g isopropanol, stir and hydrolyze for 2h; add dropwise 40g KH560 Mix with 17.5g of deionized water, react at 40°C for 2h; add 25g of Shanghai Hengsheng Chemical Co. 12h.

[0046] Through the above steps, the optical element of this embodiment is obtained, which is denoted as A2.

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Abstract

The invention provides a coating. The coating is formed by the following steps of: performing hydrolytic condensation on a first mixture comprising three-functionality-degree silane, linear siloxane, an organic silicon coupling agent, and an organic hydrophilic solvent, adding a second mixture comprising nano water-based silica sol and a curing agent, and coating and curing. The invention also provides an optical element. The optical element comprises a transparent base material and a coating which is positioned on the surface of the transparent base material and provided by the invention. The coating comprises the nano water-based silica sol, so that the toughness, hardness and abrasive resistance of the coating are improved and the coating has high adhesion to the base material.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a coating, an optical element and a preparation method thereof. Background technique [0002] Optical plastic, light in weight and low in weight, has excellent properties such as low density, impact resistance, good toughness, easy processing and molding, and can absorb ultraviolet rays. It has been widely used in optical lenses, eyeglass lenses, car lights, instrument panels, lighting fixtures, etc. . But its biggest defect is low hardness, easy to wear on the surface, and poor scratch resistance, which has become a problem that restricts the service life of optical plastics and the development of its application fields. Surface protection of optical plastics is therefore a prerequisite for the widespread use of these materials. [0003] At present, the wear-resistant coating of optical plastics mainly adopts polysiloxane, multifunctional acrylate, polyurethane an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06G02B1/10G02B1/04G02B1/14
Inventor 吴平胡文冷世伟
Owner BYD CO LTD
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