Optical film adhesive used for full bonding, preparation method and application of adhesive and optical film based on adhesive

An optical film and adhesive technology, applied in the field of optical films, can solve the problems of difficulty in exerting cohesiveness and adhesion, problems of product durability, and high cost of bonded materials, so as to solve the problems of cohesion and adhesion. Easy to peel off, prevent whitening and fogging, prevent high temperature and high humidity and boiled whitening effect

Inactive Publication Date: 2018-09-28
GUANGZHOU HUMAN ENG MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, touch screens usually print black or white ink on the window glass for shading. Generally, the printing height ranges from 20-50 μm. If the adhesive does not have the filling performance of printing height difference, it is difficult to exert sufficient adhesion and adhesion
In addition, during use in a high-temperature and high-humidity environment, the adhesive is infiltrated by water vapor. After returning to low temperature, the compatibility between the moisture in the adhesive and the adhesive will decrease, phase separation will occur, and whitening will occur, resulting in product failure. Problems in durability
[0004] In addition, the adhesive is bonded between the touch screen panel and the LCD screen. Due to the high processing difficulty, the relatively low production yield, and the high cost of the bonded materials (touch screen and display screen), the defective rework of the full bonding is quite large. important

Method used

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  • Optical film adhesive used for full bonding, preparation method and application of adhesive and optical film based on adhesive
  • Optical film adhesive used for full bonding, preparation method and application of adhesive and optical film based on adhesive

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preparation example Construction

[0046] The preparation method of the acrylate copolymer of the present invention is a conventional free radical polymerization method, by adjusting the ratio of soft and hard monomers, adding different hydrophilic monomers to synthesize a series of resins with different Tg and hydroxyl values. The following is one of the preparation methods, but it is not the only preparation method. Other methods that can obtain the target structure of the copolymer of the present invention are all achievable methods of the present invention.

[0047] Typical preparation method of acrylate copolymer: monomer composition (total weight 100g): methyl methacrylate 10-30%, butyl acrylate 40-60%, hydroxyethyl acrylate 10-30%, acrylamide 2-10% %. It is mixed with 0.2-1.5% thermal initiator benzoyl peroxide, and reacted at 80° C. for 2 hours in a solvent-free environment to obtain an acrylate copolymer.

Embodiment 1

[0048] Embodiment 1: be used for the preparation of the adhesive of electronic equipment

[0049] 50g acrylate copolymer (Tg: -31°C, hydroxyl value: 25mgKOH / g, acid value: 0.1mgKOH / g), 0.03g adhesion modifier (ShinEtsu-X-41-1059A), 5g acrylate monomer (PETA) mixed with 43g organic solvent (33g methyl isobutyl ketone and 10g ethyl acetate); add 1g crosslinking agent (Bayer N3390) and stir to disperse evenly; add 0.1g photoinitiator (1-hydroxycyclohexylbenzene base ketone), uniformly dispersed, and filtered to obtain an adhesive used for electronic equipment.

Embodiment 2

[0050] Embodiment 2: be used for the preparation of the adhesive of electronic equipment

[0051] 50g acrylate copolymer (Tg: -15℃, hydroxyl value: 40mgKOH / g, acid value: 0.5mgKOH / g), 0.05g adhesion modifier (ShinEtsu-X-41-1059A), 3g acrylate monomer (PETA) mixed with 43g organic solvent (33g methyl isobutyl ketone and 10g ethyl acetate); add 1g crosslinking agent (Bayer N3390) and stir to disperse evenly; add 0.1g photoinitiator (1-hydroxycyclohexylbenzene base ketone), uniformly dispersed, and filtered to obtain an adhesive used for electronic equipment.

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Abstract

The invention belongs to the technical field of adhesives, and discloses an optical film adhesive used for full bonding, a preparation method and application of the adhesive and an optical film basedon the adhesive. The adhesive composition disclosed by the invention has the characteristics of having excellent segment difference filling performance, having no corrosivity while satisfying the characteristics of preventing high temperature, high humidity and whitening because of water boiling, and being easy to peel off when being reworked. The optical film adhesive comprises the following components in parts by mass: 40-50 parts of an acrylate copolymer, 0.5-5 parts of a crosslinking agent, 0.5-10 parts of an acrylate monomer, 0.02-0.4 part of a photoinitiator, 0.01-1 part of an adhesion modifier, and 20-50 parts of an organic solvent. The optical film adhesive disclosed by the invention improves hydrophilicity of a material by controlling glass transition temperature Tg of the material and introduction of a hydroxyl group, achieves the effect of preventing whitening and fogging in high-temperature high-humidity or water boiling environments, and reacts with the crosslinking agent;and addition of a silane coupling agent is combined, so that the technical effect of easy reworkability is realized.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to an optical film adhesive for full lamination, a preparation method and application thereof, and an optical film based thereon. The adhesive composition of the present invention has the characteristics of excellent step filling performance, meeting the characteristics of preventing high temperature and high humidity and boiling whitening, being non-corrosive and easy to peel off during rework. Background technique [0002] Optical adhesives are widely used in electronic devices such as smartphones, tablets, touch displays, and e-readers due to their excellent optical properties and good bonding properties. Optical glue is mainly used in the bonding between the touch screen panel (TSP) and the liquid crystal display (LCD), to eliminate the air layer between the touch module and the display module, reduce the reflection between the display panel and the glass, and enha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J4/06C09J7/30C09J7/20
CPCC09J4/06C09J7/20C09J7/30C09J2203/318C09J2433/00
Inventor 乔立根董步坛许海燕黄链张玉娟
Owner GUANGZHOU HUMAN ENG MATERIAL
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