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High-performance optical adhesive as well as preparation method and application thereof

A high-performance, optical adhesive technology, applied in adhesives, non-polymer adhesive additives, N-vinylpyrrolidone copolymer adhesives, etc., can solve the problems of insufficient performance, high light transmittance and low haze of LOCA, High peeling force, high stickiness, poor effect, etc., to achieve fast curing speed, excellent anti-bubble peeling performance, and improve the effect of cohesion

Inactive Publication Date: 2020-09-01
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent application CN103709941A discloses a preparation and application method of OCA optical glue, which has the following components: diester methacrylate: 90-95; initiator: 1-5; accelerator: 0.5-5; plasticizer Agent: 0-3; Stabilizer: 0.1. The OCA optical adhesive tape described in this invention solves the technical problem that ordinary acrylic optical adhesives have poor bonding effect on plastic and glass at the same time, but the overall performance is still not excellent enough and cannot be used in electronic applications such as touch screens. Product requirements for LOCA high light transmittance, low haze, high peeling force and high holding force

Method used

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  • High-performance optical adhesive as well as preparation method and application thereof
  • High-performance optical adhesive as well as preparation method and application thereof
  • High-performance optical adhesive as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0129] The invention provides a method for preparing acrylic acid-free high-performance thermosetting optical glue.

[0130] In the examples of the present application, a Lambda950 ultraviolet-visible spectrophotometer was used for the test of the light transmittance, an Abbe refractometer was used for the test of the refractive index, and a haze meter was used for the test of the haze. The initial adhesion test uses the model CZY-G initial adhesion tester, the holding force test uses the model CZY-GS holding force tester, and the 180°peeling force test uses the universal tensile machine.

[0131] The heat-curable acrylic optical adhesive with high performance of the present invention is composed of nine components, including acrylic acid containing alkyl (meth)acrylate, alkoxyalkyl (meth)acrylate and hydroxyacrylate as essential monomer components. Class polymers also include polar group-containing monomers, multifunctional monomers, free radical initiators, molecular weight ...

Embodiment 1

[0136] The specific formula of the composition used in the present embodiment is as follows in Table 1:

[0137] Table 1 embodiment 1 (E1) and comparative example (CE) formula list

[0138]

[0139] Note: d is the first letter of the English word drop, which means a drop.

[0140]The specific experimental steps are as follows: butyl acrylate, hydroxyethyl acrylate, 2-methoxyethyl acrylate, neopentyl glycol diacrylate, N-vinyl-2-pyrrolidone and α-thioglycerol were prepared according to the formula Add the amount into a 500mL four-necked flask, and then add 65g of ethyl acetate solvent. The experimental device is equipped with a mechanical stirrer with a digital display function, the rotation speed is 80r / min, a condensed water reflux device, and a nitrogen protection device is installed. The nitrogen flow rate is moderate. , heated in a water bath and gradually raised to 75°C. During the heating process, dissolve azobisisobutyronitrile in acetone, then add the remaining et...

Embodiment 2

[0142] Table 2 embodiment 2 (E2) and comparative example (CE) formula list

[0143]

[0144] Note: d is the first letter of the English word drop.

[0145] The specific experimental steps are as follows: 2-ethylhexyl acrylate, N,N-dimethylacrylamide, methoxytriethylene glycol acrylate, dipentaerythritol hexaacrylate, N-vinyl-2-pyrrolidone and Add 2-mercaptoethanol into a 500mL four-necked flask according to the amount given in the formula, and then add 65g of ethyl acetate solvent. The experimental device is equipped with a mechanical stirrer with digital display function, the speed is 80r / min, condensed water reflux device, and nitrogen protection device, the nitrogen flow rate is moderate, the water bath is heated, and the temperature is gradually raised to 83°C. During the heating process, dissolve AIBN in acetone, then add the remaining ethyl acetate, shake well, add the polytetrafluoroethylene constant pressure dropping funnel, and start adding the initiator solution ...

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Abstract

The invention discloses a high-performance optical adhesive as well as a preparation method and application thereof. The high-performance optical adhesive is obtained through a chemical reaction of acomposition, and the composition comprises an acrylic polymer monomer, a multifunctional monomer, a polar group-containing monomer, a silane coupling agent, a cross-linking agent, a chain transfer agent, an initiator and a solvent. The adhesive film prepared by the invention is a pressure-sensitive adhesive film, the initial adhesive force is moderate, no displacement is generated during lamination, the lamination process is similar to the existing process, and no new equipment needs to be added.

Description

technical field [0001] The application relates to a high-performance optical adhesive and its preparation method and application, belonging to the fields of optical adhesive preparation and electronic information technology. Background technique [0002] OCA (Optically Clear Adhesive) optical glue is currently used in various electronic display devices and plays an important role in the display effect. One of the basic functions of this material is to improve the optical properties of the display, such as brightness and contrast, by eliminating air bubbles between the various component layers in the assembled display. The composition and characteristics of assembled screens in the display industry are changing rapidly, which leads to more and more requirements for OCA, which are more and more challenging. Not only is OCA required to have good adhesive properties, which can tightly adhere various adjacent substrates in the assembly process, but also requires OCA to maintain ...

Claims

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Application Information

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IPC IPC(8): C09J133/08C09J133/10C09J11/06C09J7/38C09J7/10C08F220/18C08F220/20C08F220/28C08F222/14C08F226/10C08F2/38C08F220/34C08F230/02G09F9/30G06F3/041
CPCC08F2/38C09J11/06C09J133/14C09J133/20C09J139/06C09J143/02C09J7/10C09J7/385C08F220/1804C08F220/1808G06F3/0412G06F2203/04103G09F9/30C08K5/5435C08K5/29C08K5/5425C08K5/544C08F220/20C08F220/281C08F222/102C08F226/10C08F220/34C08F222/104C08F230/02
Inventor 傅和青王顺王盛颜财彬陈其辉洪茂椿
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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