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Ultraviolet light curing adhesive composition and its application

A UV and adhesive technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the requirements of anti-light leakage of edge sealing adhesives, which are difficult to meet with UV adhesives, complicated processes, and long holding time, etc. question

Active Publication Date: 2020-12-18
上海昀通电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantages are also obvious, mainly as follows: 1. The operating temperature of the glue is high, which can reach 180°C, and the equipment integration is complicated
2. After the hot melt adhesive is dispensed, it is necessary to maintain the pressure to achieve the bonding strength. This pressure holding time is long, it takes about two minutes, and the efficiency is low
3. Due to the need for heating, the hot melt adhesive can only be dispensed with a needle, and the thickness of the glue is greater than 0.3mm
This thickness is too large (the total thickness of the ultra-narrow bezel is required to be ≤0.8mm), which occupies the screen assembly space
4. The process is complicated, and the opening time of hot melt adhesive is only 2-4 minutes. During this time, glue dispensing, two connectors, one foam, one pressing steel sheet and professional screen pasting equipment must be realized. Perform TP positioning and assembly TP. After completing these steps, press and hold pressure
Although UV glue can avoid the above problems, it is difficult for UV glue to meet the anti-light leakage requirements of edge sealant.

Method used

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  • Ultraviolet light curing adhesive composition and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The first step weighs 55kg aliphatic urethane acrylate, 25kg 2-(ethoxy) ethoxyethyl acrylic acid and 10kg hydroxyethyl acrylate and puts it into a mixing tank for stirring, and the stirring speed is set at 90-120rpm. Stir for 10 minutes; in the second step, weigh 3kg 1-hydroxycyclohexyl phenyl ketone and 1kg 2,4,6-trimethylbenzoyl-diphenylphosphine oxide or put them into the mixing tank for stirring, the stirring speed Set it to 100-120rpm, and the stirring time is 20 minutes; the third step, put 1kg of color-changing powder (trade name is Tangtai BS-7, Shanghai Tangtai Chemical Co., Ltd.) into the mixing tank for stirring, and the stirring speed is set to 15-30rpm , the stirring time is 25 minutes, and finally the mixture is filtered and packaged.

Embodiment 2

[0029] In the first step, weigh 50kg of aliphatic urethane acrylate, 18kg of tetraethylene glycol diacrylate, 10kg of ethoxylated trimethylolpropane triacrylate and 10kg of hydroxypropyl acrylate and put them into the mixing tank for stirring , the stirring speed is set to 60-120rpm, stirring for about 10 minutes; the second step, 2kg 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone, 0.5kg 2,4 Isopropylthioxanthone, 1kg p-N,N-dimethylaminobenzoic acid isooctyl ester and 1.5kg o-benzoylbenzoic acid methyl ester weighed and put into the mixing tank for stirring, Stirring speed is set as 100-120rpm, and stirring time is 20 minutes; The 3rd step, 2kg color changing powder (commodity brand is Tangtai BS-7, Shanghai Tangtai Chemicals Co., Ltd.) is put into mixing tank and stirs, and stirring speed is set as 15 -30rpm, the stirring time is 25 minutes, and finally the mixture can be filtered and packaged.

Embodiment 3

[0031] In the first step, 52kg of aliphatic urethane acrylate, 10kg of 2-(ethoxy)ethoxyethyl acrylate, 10kg of hydroxyethyl acrylate, 8kg of hydroxypropyl acrylate, 5kg of ethoxylated trimethylolpropane triacrylic acid Esters and 5kg tetraethylene glycol diacrylic acid are weighed and dropped into the mixing tank for stirring, the stirring speed is set at 60-120rpm, and stirred for 10 minutes; in the second step, 2kg2-hydroxyl-methylphenylpropane-1 -ketone, 0.5kg benzophenone and 2kg benzoin dimethyl ether BDK are weighed and dropped into the mixing tank to stir, the stirring speed is set as 100-120rpm, and the stirring time is 20 minutes; The trade mark is Tangtai BS-7 (Shanghai Tangtai Chemicals Co., Ltd.) is put into a mixing tank for stirring, the stirring speed is set at 15-30rpm, and the stirring time is 25 minutes, and finally the mixture is filtered and packaged.

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Abstract

The invention relates to UV (ultraviolet)-curable adhesive composition and an application thereof. The UV-curable adhesive composition is prepared from the following components in parts by weight: 50-60 parts of a polyurethane acrylate oligomer, 30-40 parts of an acrylate monomer, 3-5 parts of a photoinitiator and 1-5 parts of discoloration powder, wherein the discoloration powder is blackened after being irradiated by UV light and is irreversibly discolored. The UV-curable adhesive composition can be used in assembly of LCD (liquid crystal display) and OLED (organic light emitting diode) display products.

Description

technical field [0001] The invention relates to an ultraviolet light curing adhesive composition and its application. Background technique [0002] With changes in market demand, various display screens, such as mobile phones, PADs, and TVs, require a screen-to-body ratio of more than 85%, and the frame size is getting narrower and narrower. The edges of the existing frame are sealed with vinyl. There are currently two types of vinyl on the market, namely hot melt vinyl and UV vinyl (ultraviolet curing vinyl). [0003] At present, the mainstream of the market chooses hot melt adhesives, because hot melt adhesives have no light transmission requirements when they are cured, and the proportion of carbon black in the formula can be relatively high, so as to achieve high OD values ​​(optical density values). But its disadvantages are also obvious, mainly as follows: 1. The operating temperature of the glue is high, which can reach 180°C, and the equipment integration is compli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C09J11/00
CPCC09J11/00C09J175/14
Inventor 朱建国魏辰
Owner 上海昀通电子科技有限公司
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