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Acrylate OCA optical adhesive film, and preparation method and application thereof

An acrylate and acrylate-based technology, which is applied in the field of acrylate OCA optical adhesive film and its preparation, can solve the problems of inability to precisely control and design molecular chains, loss of practicability of products, loss of elasticity of products, etc.

Active Publication Date: 2017-04-26
NANJING HUIXIN PHOTOELECTRIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that it is impossible to precisely control and design the structure of the molecular chain. The disordered arrangement of the polymerized monomers in the molecular chain destroys the symmetry and crystallinity of the molecular chain, and it is difficult to control the molecular weight of the polymer, so that the molecular weight distribution of the molecular chain is relatively large. Wide, the high elastic state temperature range of the formed random copolymer is narrow, the product tends to become brittle and loses elasticity when the temperature is low, and it is easy to soften when the temperature is high, so that the product loses its practicability

Method used

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  • Acrylate OCA optical adhesive film, and preparation method and application thereof
  • Acrylate OCA optical adhesive film, and preparation method and application thereof
  • Acrylate OCA optical adhesive film, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Example 1 Preparation of bifunctional initiator 4-methyl-4-tert-butylazo-peroxyvaleric acid tert-butyl ester

[0063] (1) Dissolve 12.8g of tert-butylpropionylhydrazone in 400mL of tetrahydrofuran, add 80mL of n-hexane solution with a concentration of 1.4mol / L methyllithium at -20°C to obtain reaction solution A, and react at this temperature 30min; the reaction solution was cooled to -60°C, and a solution of 13g of ethyl acrylate dissolved in 100mL of tetrahydrofuran was added to the reaction solution A to obtain a reaction solution B, and the reaction was continued for 2 hours at this temperature, and the color of the reaction solution changed from orange to When the reaction is bright yellow, the reaction is terminated; then 200 mL of n-hexane solution with 10 mL of acrylic acid is added to the reaction solution B to obtain the reaction solution C, and the reaction temperature is raised to room temperature; 300 mL of water is added to the reaction solution C, and the ...

Embodiment 2

[0066] The preparation of embodiment 2 acrylate prepolymer glue

[0067] Add 200g of ethyl acetate as a reaction diluent to a 500mL reaction bottle, then add 50g of ethyl acrylate monomer, and simultaneously add 1g of hydroxyethyl acrylate and 0.1g of azoperoxybifunctional initiator 4-methyl-4-tert Butylazo-peroxyvalerate tert-butyl, feed nitrogen and start stirring, the speed is set to 80r / min, turn on the 100W LED ultraviolet lamp at room temperature, and then slowly add 0.1g of 20mL of ethyl acetate solution of bifunctional initiator 4-methyl-4-tert-butylazo-peroxyvaleric acid tert-butyl ester initiates the polymerization reaction, after 30 minutes of dropwise addition, it reacts for 1.5 hours, and its viscosity reaches about 2000cps after testing , raise the temperature to 75°C, and start to drop 100mL of ethyl acetate solution containing 85g of isooctyl methacrylate and 1g of triethylamine at the same time, and then react for about 3h after 1h of dropping, when the viscos...

Embodiment 3

[0068] The preparation of embodiment 3 acrylate prepolymer glue

[0069] In a 500mL reaction flask, add 200g of ethyl acetate as a reaction diluent, then add 60g of butyl acrylate monomer, and simultaneously add 1.2g of hydroxyethyl acrylate and 0.15g of azoperoxybifunctional initiator 4-methyl-4- tert-butyl azo peroxyvalerate tert-butyl, feed nitrogen and start stirring, the speed is set to 90r / min, turn on the 100W LED ultraviolet lamp at room temperature, then slowly add 0.15 25mL of ethyl acetate solution of g bifunctional initiator 4-methyl-4-tert-butylazoperoxyvaleric acid tert-butyl ester initiates the polymerization reaction, and after 40min dropwise addition, it reacts for about 2h, and its viscosity reaches the When the viscosity reaches about 1500cps, raise the temperature to 80°C, and start to drop 150mL of ethyl acetate solution containing 100g of isooctyl methacrylate and 1.5g of triethylenediamine at the same time, and then react for 2.5h after 1h of dropping W...

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Abstract

The invention discloses an acrylate OCA optical adhesive film, comprising by weight, 90 to 92 parts of an acrylate prepolymer adhesive, 3 to 5 parts of a curing agent, 10 to 15 parts of tackifying resin, 0.5 to 1 part of a catalyst, 0.3 to 1 part of an antioxidant and 0.1 to 1 part of a blue light absorber. A preparation method for the acrylate OCA optical adhesive film comprises the following steps: adding the curing agent, the catalyst, the antioxidant, the blue light absorbent and other additives into the acrylate prepolymer adhesive, carrying out uniform mixing, and then successively carrying out coating, drying and curing, unreeling, compounding, reeling and the like so as to prepare a substrate-free acrylate OCA optical adhesive product. The prepared substrate-free acrylate OCA optical adhesive has excellent resistance to low and high temperature and humidity; and when used as a filling adhesive and a bonding double-faced adhesive tape applied between a touch screen and a display layer, the acrylate OCA optical adhesive has the outstanding advantages of strong and stable adhesion, good light-admitting quality and no proneness to fogging and whitening.

Description

technical field [0001] The invention belongs to the field of oily acrylate pressure-sensitive double-sided adhesives, and more specifically relates to an acrylate OCA optical adhesive film and its preparation method and application. Background technique [0002] As the application of electronic and electrical products with LCD screens such as mobile phones and computers becomes more and more popular, the use of OCA (Optically Clear Adhesive) optical glue in LCD touch screens is becoming more and more widely used, and the amount is also increasing. Because during the storage and transportation process, especially during the export shipping process, its products have to withstand the severe test of extreme weather such as hot and humid or severe cold for dozens of days or months, and there are also different natural weather environments in the north and south during use. Or the difference in the indoor use environment, which puts forward requirements for the display screen to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J153/00C09J11/06C09J11/08C09J7/00C08F293/00C08F2/48
CPCC08F2/48C08F293/00C08L2201/08C09J7/00C09J11/06C09J11/08C09J153/00C09J2203/318C09J2301/312C09J2453/00C08L57/02C08L45/00C08L93/04C08K5/205C08K5/1345
Inventor 夏建明夏小五符定良
Owner NANJING HUIXIN PHOTOELECTRIC MATERIAL
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