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Light curing adhesive for splicing capacitive touch screen and preparation method of light curing adhesive

A capacitive touch screen, light-curing technology, applied in the direction of adhesives, carboxyl rubber adhesives, adhesive types, etc., can solve the problems of low curing shrinkage, yellowing resistance, low refractive index, etc., and achieve low curing shrinkage High efficiency, good yellowing resistance, high light transmittance

Inactive Publication Date: 2013-07-03
SHENZHEN FISHER NEW MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the defects of low refractive index, high hardness, low curing shrinkage rate, and yellowing resistance of the light-curing adhesive used for capacitive touch screen bonding in the prior art, and to provide a capacitive A photocurable adhesive for bonding a type touch screen and a preparation method thereof, the transmittance of the adhesive is greater than or equal to 99%; the refractive index after curing is greater than or equal to 1.52; the shrinkage rate is small; the hardness is low, colorless and transparent, good yellowing resistance and reliability good sex

Method used

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  • Light curing adhesive for splicing capacitive touch screen and preparation method of light curing adhesive

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preparation example Construction

[0056] The present invention proposes a preparation method for preparing the above-mentioned photocurable adhesive for capacitive touch screen bonding, which comprises the following steps:

[0057] Step 1: According to weight percentage, take 30%-50% of main resin, 20%-40% of auxiliary resin, 10%-30% of active monomer, 0.5%-5% of photoinitiator, and 0.1%-5% of auxiliary agent;

[0058] Step 2: Stir well and serve.

Embodiment 1

[0061] Take the following components,

[0062] Main resin: 30g high molecular weight aliphatic urethane acrylate resin with grade CN980,

[0063] Auxiliary resin: 40g brand is the acrylate-modified isocyanuric acid resin of UV1820,

[0064] Active monomer: 25g of isobornyl acrylate (IBOA) of SR506 produced by Sartomer Company,

[0065] Photoinitiator: 4.0 g of 1-hydroxyl-cyclohexyl benzophenone of I-184,

[0066] Auxiliary agent: 0.5g of coupling agent, choose γ-methacryloxypropyl trimethoxysilane with brand A-174, and 0.5g of leveling agent, choose polyacrylic acid with brand TEGO-370 ester solution.

[0067] The above-mentioned components are stirred evenly.

[0068] After conversion, the main resin accounts for 30.0%, the auxiliary resin accounts for 40.0%, the active monomer accounts for 25%, the photoinitiator accounts for 4.0%, and the auxiliary agent accounts for 1.0%.

[0069]

Embodiment 2

[0071] Take the following components,

[0072] Main resin: 49.9g high molecular weight aliphatic urethane acrylate resin with grade CN964,

[0073] Auxiliary resin: 35g vinyl-terminated liquid nitrile rubber of the grade VTBN1300X33,

[0074] Active monomer: 10g hydroxyethyl methacrylate (HEMA, selected from Guangzhou Sanwang Chemical Materials Co., Ltd.),

[0075] Photoinitiator: 5.0g brand is the macromolecule photoinitiator of the oligomeric polyfunctional group-a-hydroxy ketone of ESACURE ONE,

[0076] Auxiliary agent: 0.05g coupling agent, γ-aminopropyltriethoxysilane with brand A-1100, and 0.05g leveling agent, polyacrylate solution with brand TEGO-460.

[0077] The above-mentioned components are stirred evenly.

[0078] After conversion, the main resin accounts for 49.9%, the auxiliary resin accounts for 35.0%, the active monomer accounts for 10.0%, the photoinitiator accounts for 5.0%, and the auxiliary agent accounts for 0.1%.

[0079]

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Abstract

The invention discloses a light curing adhesive for splicing a capacitive touch screen. The light curing adhesive is prepared from the following components by weight percent: 30-50% of main body resin, 20-40% of auxiliary resin, 10-30% of an active monomer, 0.5-5% of a photoinitiator, and 0.1-5% of an auxiliary agent, wherein the main body resin is aliphatic urethane acrylate resin; the auxiliary resin is one substance or a mixture of more substances: cyanuric acid resin modified by acrylic ester, liquid nitrile rubber, liquid polybutadiene rubber and liquid isoprene rubber; the active monomer is one or a mixture of more of a vinyl ether monomer and an acrylate monomer; the photoinitiator is one or a mixture of two of a free radical initiator and a cationic photoinitiator; and the auxiliary agent is one or mixture of two of a silane coupling agent and a flatting agent. The light curing adhesive for splicing the capacitive touch screen has the advantages of high refractive index, high light transmittance, low color brightness, low hardness, low cure shrinkage rate, good reliability, good yellowing resistance and the like.

Description

technical field [0001] The invention relates to a photocurable adhesive and a preparation method thereof, in particular to a photocurable adhesive for bonding capacitive touch screens cured by ultraviolet light or visible light and a preparation method thereof. Background technique [0002] With the rapid development of the information industry, especially with the application and explosive development of touch screen technology in electronic products such as mobile phones and notebook computers, the touch screen technology has also been rapidly developed and widely used. [0003] Capacitive touch screen technology is currently the most popular touch screen technology. In its process, the bonding of the cover lens and the sensor requires the use of special optical glue. However, the initial solid-state optical adhesive OCA has disadvantages such as that each product needs to be molded to the corresponding size, can only fill thicker gaps ≥ 1 / 10, the process is complicated, t...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J179/04C09J115/00C09J113/00C09J109/00C09J153/00
Inventor 戚仁宏
Owner SHENZHEN FISHER NEW MATERIALS CO LTD
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