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A kind of high light transmittance optically transparent adhesive for laminating touch screen and its synthesis method

A technology of optical transparent glue and high light transmittance, which is applied in the field of electronic information, can solve problems such as corrosion electrodes, achieve the effects of improving light transmittance, convenient use, and reducing light loss

Active Publication Date: 2020-12-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fourth, this prior art uses acrylic acid, a common functional monomer, which is highly acidic. When the optical glue containing this monomer is used to bond optical devices containing electrodes such as touch screens, the electrodes will be corroded.

Method used

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  • A kind of high light transmittance optically transparent adhesive for laminating touch screen and its synthesis method
  • A kind of high light transmittance optically transparent adhesive for laminating touch screen and its synthesis method
  • A kind of high light transmittance optically transparent adhesive for laminating touch screen and its synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 (E1): raw material formula sees Table 1

[0047] Table 1 Embodiment 1 raw material formula table

[0048] raw material BA HEA IBOMA NVP NDM EA AIBN acetone Bisamide Absolute ethanol Mass / g 20 20 5 1 0.1 70 0.4 4 8 10

[0049] Pretreatment of raw materials: butyl acrylate (BA), hydroxyethyl acrylate (HEA), isobornyl methacrylate (IBOMA), N-vinylpyrrolidone (NVP) and cross-linking agent bisamide were vacuum dehydrated for 1 h before use , the temperature of the oil bath is the same as the respective boiling points, and then the monomers (BA, HEA, IBOMA, NVP), the cross-linking agent bisamide and the solvent ethyl acetate (EA) are subjected to 3A molecular sieve adsorption and dehydration for 12h, dodecyl Mercaptan (NDM) and azobisisobutyronitrile AIBN were placed in a vacuum oven for 12 hours before use.

[0050] Add BA, HEA, IBOMA, NVP and NDM after pretreatment into a 500ml four-neck flask according to the f...

Embodiment 2

[0051] Embodiment 2 (E2): raw material formula sees Table 2

[0052] Table 2 Example 2 formula table

[0053] raw material BA HPA MMA NMMA NDM EA AIBN acetone Bisamide Absolute ethanol Mass / g 20 20 5 1 0.1 70 0.4 4 8 10

[0054] Pretreatment of raw materials: BA, hydroxypropyl acrylate (HPA), methyl methacrylate (MMA), N-methylmethacrylamide (NMMA) and cross-linking agent bisamide were vacuum dehydrated for 2 hours before use, and oil bath The pot temperature is 5°C higher than their respective boiling points, and then BA, HPA, MMA, NMMA, bisamide, EA, acetone and absolute ethanol are subjected to 4A molecular sieve adsorption and dehydration for 12 hours, dodecyl mercaptan (NDM) and azo Diisobutyronitrile AIBN was placed in a vacuum oven for 12 hours for use.

[0055] Add BA, HPA, MMA, NMMA and NDM after pretreatment into a 500ml four-neck flask according to the formula, and then add 55g of EA. The experimental device is equip...

Embodiment 3

[0056] Embodiment 3 (E3): raw material formula sees Table 3

[0057] Table 3 Example 3 formula table

[0058]

[0059] Raw material pretreatment: BA, hydroxyethyl methacrylate (HEMA), methyl acrylate (MA), N,N-dimethylmethacrylamide (N,N-DMMA) and cross-linking agent bisamide before use Carry out vacuum dehydration for 3 hours, and the temperature of the oil bath is 5°C higher than their respective boiling points, then BA, HEMA, MA, N,N-DMMA, bisamide, EA, acetone and absolute ethanol are subjected to 5A molecular sieve adsorption dehydration for 36 hours, ten Dialkylmercaptan (NDM) and azobisisobutyronitrile AIBN were placed in a vacuum oven for 24 hours before use.

[0060] Add the pretreated BA, HEMA, MA, N,N-DMMA and NDM into a 500ml four-neck flask according to the formula, and then add 55g of EA. The experimental device is equipped with a mechanical stirrer with digital display function, a condensation device and a thermometer. The temperature is 120r / min, the oil b...

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Abstract

The invention discloses a high-transmittance optically transparent glue for bonding touch screens and a synthesis method thereof. In parts by weight, the raw material formula of high light transmittance optically transparent adhesive includes 30-50 parts of alkyl (meth)acrylate, 25-40 parts of hydroxyalkyl (meth)acrylate, 1-3 parts containing N Atomic polar monomer, 10-20 parts of cross-linking agent, 0.01-0.02 parts of chain transfer agent, 0.5-1 part of thermal initiator. The high-transmittance optically transparent adhesive of the present invention presents a pressure-sensitive state after being heat-cured, has moderate initial adhesion, excellent holding power, does not shift and is not easy to fall off after lamination, and has a light transmittance of over 99.5%. The degree value is lower than 0.1%, the refractive index is close to the glass refractive index 1.49, and the synthesis method is environmentally friendly.

Description

technical field [0001] The invention belongs to optical adhesives, and in particular relates to a high-transmittance optical transparent adhesive for laminating liquid crystal display screens and a synthesis method thereof. Sensitive glue belongs to the field of electronic information technology. Background technique [0002] At present, most of the smartphone and tablet markets use direct bonding technology to eliminate the gap between the LCM (liquid crystal module) and the touch screen glass or film. When laminating glass, most touch panel factories are accustomed to using optical tape OCA lamination technology with high production efficiency and uniform thickness. This has a lot to do with the nature of OCA. OCA is suitable for small lamination surfaces such as mobile phones and tablets. In some cases, the production efficiency is high, especially heat-cured OCA, which can be cured by heating and made into a film, which is convenient and quick to use. [0003] UV curin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/10C09J7/38C09J133/08C08F220/18C08F220/20C08F220/14C08F220/56C08F220/54C08F226/06C08F226/10
CPCC09J7/10C09J7/385C09J133/14C09J133/26C08F220/18C08F220/20C08F220/1804C08F220/1811C08F226/10C08F226/06C08F220/14C08F220/56C08F220/54
Inventor 傅和青王顺李晓雅
Owner SOUTH CHINA UNIV OF TECH
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