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A hard coating film and optical technology, applied in the direction of coating, polyester coating, epoxy resin coating, etc., can solve the problems of hard coating film damage, hard coating film deformation, tearing, etc.
Active Publication Date: 2021-11-02
NINGBO HUGHSTAR ADVANCED MATERIAL TECH
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When the hard coating film adhered for a long time is unwound and separated, the local area of the hard coat...
Method used
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[0026] In the preparation of optical hard coatings, in order to make the anti-adhesion effect between the hard coatings better, inorganic particles are usually added to the hard coating. After the addition of inorganic particles, the surface of the hard coating can have a certain roughness. Degree, so that it has a certain anti-adhesion performance. At the same time, the inorganic particles on the surface of the hard coating can enhance the scratch resistance of the hard coating; however, if the amount of inorganic particles added is too large, the hard coating will be more brittle, making it easy to crack. Therefore, since the toughness and scratch resistance of the hard coating film need to be balanced, in the prior art, the addition amount of inorganic particles is usually adjusted so that the effects of the two can be balanced.
[0027] In the present application, the inorganic particles are more likely to gather on the surface of the hard coat, which can improve the scrat...
Embodiment 1
[0064] This embodiment provides an optical hard coating film, comprising a transparent base film laminated sequentially from bottom to top and an optical hard coating layer coated on both sides of the transparent base film, wherein the optical hard coating liquid used to form the optical hard coating Components are in parts by weight as shown in Table 1:
[0065] The composition list of the optical hard coating liquid that table 1 embodiment 1 provides
[0066]
[0067] The preparation method of optical hard coating film, comprises the steps:
[0068] (1) Preparation of modified silicon powder: put Evonik hydrophilic silicon powder Aerosil 130 into a blast dryer, dry at 200°C for 12 hours, then put 20 parts by weight of silicon powder into a flask, add volume 100ml of ethanol / water mixed solution with a ratio of 1:1, ultrasonically disperse for 30 minutes to obtain a dispersion, then add oxalic acid to the dispersion, adjust the pH value of the dispersion between 4.0 and 4...
Embodiment 2
[0073] Example 2 is basically the same as Example 1, the difference being that the added amount of the modified dispersion liquid is 3.5 parts by weight.
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Abstract
The invention relates to a preparation method of an optical hard coating film, and belongs to the technical field of optical hard coating films. The preparation method comprises the steps of hydrolyzing -Si-X at one end part of a silane coupling agent into -Si-OH, and then carrying out dehydration reaction on part of hydroxyl groups on the surfaces of hydrophilic inorganic particles and hydroxyl groups in -Si-OH so as to enable the hydrophilic inorganic particles to be grafted with the silane coupling agent to obtain the hydrophilic modified inorganic particles; mixing the hydrophilic modified inorganic particles, a solvent and a hydrophobic UV curing reaction matrix to obtain an optical hard coating liquid; and coating at least one surface of a transparent base film with the optical hard coating liquid, carrying out ultraviolet curing, enabling a hydrophobic UV curing reaction matrix to be subjected to a cross-linking reaction, meanwhile, enabling an olefinic bond at the other end of the hydrophilic modified inorganic particle grafted silane coupling agent to react with an olefinic bond in the hydrophobic UV curing reaction matrix, and obtaining the optical hard coating film. The optical hard coating film prepared by the preparation method is relatively good in toughness, scratch resistance and adhesion resistance.
Description
technical field [0001] The present application relates to the technical field of optical hard coating, and in particular to a preparation method of optical hard coating. Background technique [0002] Image display devices such as liquid crystal displays (LCDs) and electroluminescent displays (OLEDs) are easily scratched by external foreign matter. Generally, a layer of hard coating liquid is coated on the plastic film, and after curing, a hard coating is formed and attached to the surface. The surface of the display device, the hard coating can improve the durability of the display device, the hard coating can be transparent or matte (anti-glare), with anti-static, anti-fingerprint, anti-blue light or anti-reflection function, so the hard coating (Plastic film + hard coating) In addition to increasing the surface scratch resistance of the protected object, it can also improve the image quality of the display. The above-mentioned hard coating films are often produced continu...
Claims
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