Liquid optical adhesive and preparation method thereof

An adhesive and optical technology, applied in the direction of adhesives, non-polymer organic compound adhesives, etc., can solve problems such as high refraction and atomization, poor adhesive tape adhesion, and insufficient flexibility, and achieve low refractive index and production The effect of high efficiency and high light transmission

Inactive Publication Date: 2014-02-05
深圳市中显微电子有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the performance deficiencies of traditional OCA tapes, such as easy generation of air bubbles, high cost, limited thickness, poor tape adhesion, low light transmittance, high refraction and atomization, and insufficient flexibility. Provide a liquid optically transparent adhesive that is cured by ultraviolet rays (UV) and is used to achieve fixed bonding between the glass in the touch screen and the touch-sensitive screen, so as to adapt to the electronic display screen (touch screen) that has no difference in text and image information Requirements for optimized transmission and reproduction, meeting multiple technical indicators such as non-differentiated transmission and reproduction of text and image information after gluing, bonding, and fixing between the glass protective layer in the touch screen and the touch sensor screen (Sensor screen)

Method used

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  • Liquid optical adhesive and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A raw material for making a liquid optically transparent adhesive according to the present invention includes the following ingredients in proportion by weight:

[0016] Resin oligomer for binder: polyurethane acrylate PUA 22%

[0017] Epoxy Acrylate EA 20%

[0018] Reactive diluent: HDDA 24.5%

[0019] TPGDA 30%

[0020] Photosensitizer: HMPF 1.5%

[0021] Photosensitization Accelerator: EDAB 1.3%

[0022] Crosslinking tackifier: KH-170 1.7%

[0023] Add the resin oligomer and reactive diluent weighed according to the above weight percentage ratio into the reaction kettle, stir at room temperature (25°C) for 1.5 hours, and then add photosensitizer, photosensitization accelerator, and crosslinking tackifier according to the proportion of ingredients , stirred for 3.5 hours, until the mixture was uniform; then, conventional vacuum defoaming was carried out on the obtained product of the preceding steps, and after filtering and discharging, in the finished product, s...

Embodiment 2

[0026] The raw materials for making the liquid optically transparent adhesive of embodiment 2 include the following ingredients in proportion by weight:

[0027] Binder resin oligomer: polyurethane acrylate PUA 35%

[0028] Reactive diluent: TPGDA 63%

[0029] Photosensitizer: HMPF 0.8%

[0030] Photosensitization Accelerator: EDAB 0.6%

[0031] Crosslinking tackifier: KH-550 0.7%

[0032] Similarly, weigh the binder resin oligomer and active diluent into the reaction kettle according to the above weight percentage ratio, stir at 40°C for 0.5 hours, then add photosensitizer, photosensitization accelerator, crosslinking enhancer according to the above ratio of ingredients. Viscosity, stirring for 4 hours, until the mixture is uniform; then carry out conventional vacuum degassing on the obtained product of the previous steps, and after filtering and discharging, in the finished product, samples are compared with the technical indicators, and the quality parameters are checked...

Embodiment 3

[0035] The liquid optical adhesive of embodiment 3 comprises the following raw material formula feeding and making by weight ratio:

[0036] Binder resin oligomer: epoxy acrylate EA 45%

[0037] Reactive diluent: HDDA 29%

[0038] TPGDA 23%

[0039] Photosensitizer: HMPF 1.2%

[0040] Photosensitizer: EDAB 0.8%

[0041] Crosslinking tackifier: KH550 1.0%

[0042] Add the resin oligomer and active diluent weighed according to the above weight percentage ratio into the reaction kettle, stir at 30°C for 2.5 hours, then add photosensitizer, photosensitization accelerator, and crosslinking tackifier according to the proportion of ingredients, and stir for 2.5 hours. Hours, until the mixture is uniform, take its clear sample, and carry out quality inspection against the technical indicators. The measured viscosity of the product is 2530 mPa·s, the liquid light transmittance is 99.2%, and the refractive index is 1.48.

[0043] The liquid optical adhesive for the UV curing capaci...

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Abstract

The invention relates to a liquid optical adhesive which can be cured through ultraviolet light and is capable of achieving fixed adhesion between glass and touch control sensing screens in the process that a capacitance type touch screen is manufactured, and a preparation method of the liquid optical adhesive. The liquid optical adhesive is prepared from the following raw materials in percentage by weight: 35-48% of a resin oligomer, 50-63% of a reactive diluent, 0.5-1.3% of a photosensitizer, 0.8-1.6% of a photosensitive prompter and 0.4-1.4% of a cross-linking tackifier. The resin oligomer can be prepared by mixing and dissolving urethane acrylate or epoxy acrylate or a mixture of the two acrylic esters, by defoaming in vacuum and by filtering. The resin oligomer has the advantages of sufficient solidification in ultraviolet light, high production efficiency, high adhesion strength, high light permeability, small solidification shrinkage, yellowing resistance, simple manufacturing process, environmental friendliness and the like.

Description

technical field [0001] The invention relates to a liquid optical adhesive and a preparation method thereof, belonging to the technical field of chemical synthetic adhesives, in particular to a liquid optical adhesive that is mainly used in the production process of capacitive touch screens and can be cured by ultraviolet rays to realize the bonding between glass and touch sensing screens. Adhesive for fixed bonding and method for its preparation. Background technique [0002] Mobile phones and electronic instrument displays are undergoing a revolution, and traditional resistive touch screens are gradually being replaced by capacitive touch screens. Capacitive touch screens are not only used in mobile phones, computers, and TV display screens, but also have a large number of applications in various sectors of the national economy such as process site monitoring and information remote transmission. [0003] A typical capacitive touch screen is a four-layer composite glass scr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02
Inventor 熊远钦姚伏恒杨忠奎李坤夏新年周自立卢彦兵周卫华徐伟箭刘海峰
Owner 深圳市中显微电子有限公司
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