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UV curing optical transparent adhesive tape suitable for full lamination of thick-frame liquid crystal display module and preparation method of UV curing optical transparent adhesive tape

A liquid crystal display module, optical transparent adhesive technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the weather resistance difficult to meet the corresponding environmental conditions, yellowing, film drawing cohesion Failure and other problems, to achieve the effect of improving the film formation and curing speed of the system, low haze, and controllable curing speed

Active Publication Date: 2022-05-10
NANTONG KANGERLE MEDICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional polyacrylic optical transparent adhesive formula increases the thickness of the adhesive layer to 0.5mm, which is very prone to problems such as film drawing and cohesion failure; at the same time, thick-frame LCD modules are mostly used in large-scale industrial LCD screens. The current polyacrylic optical The weather resistance of transparent glue is difficult to meet the corresponding environmental conditions, and a series of display problems such as yellowing are prone to occur after a long time

Method used

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  • UV curing optical transparent adhesive tape suitable for full lamination of thick-frame liquid crystal display module and preparation method of UV curing optical transparent adhesive tape
  • UV curing optical transparent adhesive tape suitable for full lamination of thick-frame liquid crystal display module and preparation method of UV curing optical transparent adhesive tape
  • UV curing optical transparent adhesive tape suitable for full lamination of thick-frame liquid crystal display module and preparation method of UV curing optical transparent adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The optically transparent glue includes by weight:

[0045] 50 parts of polyfunctionality acrylic end-capped polyurethane prepolymer

[0046] 25 parts of acrylic acid monomer (including: 15 parts of lauryl acrylate, 10 parts of isobornyl acrylate)

[0047]3 parts of multifunctional acrylic crosslinking agent (hexanediol diacrylate)

[0048] 1 part of photoinitiator (of which: 0.5 part of photoinitiator 819, 0.5 part of photoinitiator 184)

[0049] Inorganic filler (KH570 modified nano silica) 5 parts

[0050] 0.5 parts of chain transfer agent (n-dodecanethiol)

[0051] Anti-aging agent (anti-aging agent 264) 4 parts.

[0052] The preparation method of optically transparent adhesive comprises the following steps:

[0053] (1) Prepare polyfunctionality acrylic acid-terminated polyurethane prepolymer: 200g of polypropylene oxide diol PPG5000 dehydrated at 110°C is added in a three-necked bottle, and 0.3% by weight of dilauric acid diol is added Butyltin, 35.95g of te...

Embodiment 2

[0058] The optically transparent glue includes by weight:

[0059] 70 parts of polyfunctionality acrylic end-capped polyurethane prepolymer

[0060] 35 parts of acrylic acid monomer (including: 15 parts of lauryl acrylate, 20 parts of isobornyl acrylate)

[0061] 6 parts of multifunctional acrylic crosslinking agent (hexanediol diacrylate)

[0062] 2.5 parts of photoinitiator (among them: 1 part of photoinitiator 819, 1.5 parts of photoinitiator 184)

[0063] Inorganic filler (KH570 modified nano silica) 10 parts

[0064] 1 part of chain transfer agent (n-dodecanethiol)

[0065] Anti-aging agent (anti-aging agent 264) 6 parts.

[0066] The preparation method of optically transparent adhesive comprises the following steps:

[0067] (1) Prepare polyfunctionality acrylic acid-terminated polyurethane prepolymer: 200g of polypropylene oxide diol PPG5000 dehydrated at 110°C is added in a three-necked bottle, and 0.3% by weight of dilauric acid diol is added Butyltin, 46.21g of...

Embodiment 3

[0071] The optically transparent glue includes by weight:

[0072] 60 parts of polyfunctionality acrylic end-capped polyurethane prepolymer

[0073] 30 parts of acrylic monomer (including: 15 parts of lauryl acrylate, 15 parts of isobornyl acrylate)

[0074] 4 parts of multifunctional acrylic crosslinking agent (hexanediol diacrylate)

[0075] 2 parts of photoinitiator (of which: 1 part of photoinitiator 819, 1 part of photoinitiator 184)

[0076] Inorganic filler (KH570 modified nano silica) 8 parts

[0077] 0.8 parts of chain transfer agent (n-dodecanethiol)

[0078] Anti-aging agent (anti-aging agent 264) 5 parts.

[0079] The preparation method of optically transparent adhesive comprises the following steps:

[0080] (1) Prepare polyfunctionality acrylic acid-terminated polyurethane prepolymer: 200g of polypropylene oxide diol PPG5000 dehydrated at 110°C is added in a three-necked bottle, and 0.3% by weight of dilauric acid diol is added Butyltin, 35.95g of tetrameth...

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Abstract

The invention belongs to the technical field of optical transparent adhesive tapes, and particularly relates to a UV curing optical transparent adhesive tape suitable for full lamination of a thick-frame liquid crystal display module and a preparation method of the UV curing optical transparent adhesive tape. The UV-cured optical transparent adhesive tape is prepared from the following components in parts by weight: 50 to 70 parts of polyfunctional acrylic-terminated polyurethane prepolymer, 25 to 35 parts of acrylic monomer, 3 to 6 parts of polyfunctional acrylic cross-linking agent, 1 to 2.5 parts of photoinitiator, 5 to 10 parts of inorganic filler, 0.5 to 1 part of chain transfer agent and 4 to 6 parts of anti-aging agent. The acrylic monomer comprises the following components in parts by weight: 15-20 parts of a soft acrylic monomer with low glass transition temperature and 10-20 parts of a hard acrylic monomer with high glass transition temperature. The polyfunctionality acrylic acid terminated polyurethane prepolymer is adopted to improve the film-forming property and curing speed of a system and reduce the volume shrinkage rate of an adhesive film, the thickness of an adhesive layer can reach 3 mm and is far better than the thickness range of a traditional acrylic acid optical transparent adhesive, an organic solvent does not need to be additionally added to regulate and control the viscosity during preparation, and no volatile organic compound is discharged.

Description

technical field [0001] The application belongs to the technical field of optical transparent adhesives, and in particular relates to a UV-curable optical transparent adhesive suitable for full lamination of thick-frame liquid crystal display modules and a preparation method thereof. Background technique [0002] The liquid crystal display screen can be roughly divided into three functional units, which are protective glass, touch panel, and liquid crystal display module from top to bottom. The three parts realize the overall function through lamination. The bonding method can be divided into two types: full bonding and frame bonding. Frame bonding is also called word-of-mouth bonding, which simply uses multi-sided adhesive to fix the four sides of the touch panel and the frame of the LCD module. Although the frame sticking process is simple and the cost is low, due to the air layer between the liquid crystal display module and the touch panel, the light is refracted after pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/16C09J11/00C08G18/67C08G18/48C08G18/76C08G18/75C09J7/25C09J7/30
CPCC09J175/16C09J11/00C08G18/673C08G18/4825C08G18/765C08G18/755C08G18/758C09J7/255C09J7/30C09J2203/318C08K9/06C08K3/36C08G18/48
Inventor 王刚余英丰姜欣黄新波
Owner NANTONG KANGERLE MEDICAL MATERIALS CO LTD