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Optical transparent adhesive composition and optical transparent adhesive film

An optically transparent, adhesive technology, applied in the direction of adhesives, amide/imide polymer adhesives, adhesive types, etc., can solve the problems of cumbersome process, inability to repair, low yield, etc., and achieve defoaming good effect

Active Publication Date: 2022-03-25
SUZHOU FINESET MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is cumbersome, the cost is high, it cannot be repaired, and the yield rate is low
[0004] Patent CN108314979A provides an optically transparent adhesive, which has a certain ability to fill ink steps, but does not mention the adhesion and specific modulus of OCA, which cannot be used on curved surfaces. Bonding and rebound bubbles are generated by the stress of the supporting curved surface on the glass

Method used

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  • Optical transparent adhesive composition and optical transparent adhesive film
  • Optical transparent adhesive composition and optical transparent adhesive film
  • Optical transparent adhesive composition and optical transparent adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This example provides a preparation method for an optically clear adhesive film:

[0036] In parts by weight, 30 parts of 2-EHA, 3 parts of EHMA, 42 parts of IBOA, 15 parts of ACMO, 7 parts of AM, 6 parts of 4-HBA, 6 parts of ISTA, 0.4 parts of 651 at 0.5-1.5mw / m 2 Under the irradiation of LED light source, about 40mj energy is absorbed to obtain adhesive prepolymer;

[0037] Add 0.4 parts of 651, 0.5 parts of Z-6011 and 0.05 parts of HDDA to the adhesive prepolymer, mix completely, and vacuum defoam. Glue the heavy film with a slot-type coating head, stick it with a light film, and then cure it with UV light. The light source is a metal halide lamp, and the intensity is 80mw / m 2 , energy 580mj / m 2 . Prepared 100μm optically transparent adhesive film;

[0038] The above optically transparent adhesive film is bonded to the glass cover with a curvature of 90° (edge ​​ink thickness 25um) and the OLED module through the laminating equipment, and then degassed in a high-...

Embodiment 2

[0040] This example provides a preparation method for an optically clear adhesive film:

[0041] By weight, 46 parts of 2-EHA, 5 parts of EHMA, 16 parts of IBOA, 9 parts of ACMO, 4 parts of 4-HBA, 4 parts of ISTA, 0.3 parts of 184 at 0.5-1.5mw / m 2 Under the irradiation of LED light source, the absorption is about 60mj / m 2 energy to obtain the adhesive prepolymer;

[0042] Add 0.3 part of 651, 0.5 part of KBM403 and 0.3 part of HDDA to the adhesive prepolymer, mix completely, and vacuum defoam. Glue the heavy film with a slot-type coating head, stick it with a light film, and then cure it with UV light. The curing light source is a metal halide lamp, and the intensity is 60mw / m 2 , energy 660mj / m 2 . Prepared 100μm optically transparent adhesive film;

[0043] The above optically transparent adhesive film is bonded to the glass cover with a curvature of 90° (edge ​​ink thickness 25um) and the OLED module through the laminating equipment, and then degassed in a high-tempera...

Embodiment 3

[0045] This example provides a preparation method for an optically clear adhesive film:

[0046] In parts by weight, 32 parts of 2-EHA, 6 parts of LA, 2 parts of EHMA, 27 parts of IBOA, 6 parts of ACMO, 8 parts of AM, 4 parts of 4-HBA, 7 parts of ISTA, 0.5 parts of 651 at 0.5-1.5mw / m 2 Under the irradiation of LED light source, the absorption is about 60mj / m 2 energy to obtain the adhesive prepolymer;

[0047] Add 0.2 parts of 651 and 1.5 parts of PO-NPGDA to the adhesive prepolymer, mix completely, after vacuum defoaming, use a slot-type coating head to glue on the heavy film, stick it with a light film, and then cure it with UV. Light source metal halide lamp, intensity 60mw / m 2 , energy 660mj / m 2 , to prepare a 100μm optically transparent adhesive film;

[0048] The above optically transparent adhesive film is bonded to the glass cover with a curvature of 90° (edge ​​ink thickness 25μm) and the OLED module through the laminating equipment, and then degassed in a high-...

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Abstract

The invention discloses an optical transparent adhesive composition and an optical transparent film, the raw materials of the adhesive composition comprise a polymer and a photoinitiator, and also comprise at least one of a cross-linking agent, a coupling agent and a heat stabilizer, the weight-average molecular weight of the polymer is 10000-800000, the Tg is-30-30 DEG C, the monomer conversion rate is 10-30%, and the photoinitiator is at least one of a cross-linking agent, a coupling agent and a heat stabilizer. The apparent viscosity of the polymer at 25 DEG C is 1000-15000Pa. S, the polymer is prepared by polymerizing the following raw materials in parts by weight: 30-55 parts of alkyl (meth) acrylate, 3-10 parts of hydrophobic monomer and 33-70 parts of functional acrylic monomer, and alkyl ester in the alkyl (meth) acrylate has a C4-C18 structure. The adhesive film prepared from the adhesive composition is high in bonding strength and modulus, not only can wet and fill the printing ink segment difference on the cover plate display, but also can have certain strength to support the damage of curved surface stress to the adhesive without generating or rebounding bubbles.

Description

technical field [0001] The invention relates to the technical field of optically transparent adhesives, in particular to an optically transparent adhesive composition and an optically transparent adhesive film, which are applied to the bonding of a curved touch screen glass cover and an OLED fixed curved display. Background technique [0002] The 5G era has entered our daily life, and mobile phones, Pads, laptops, and car displays are increasingly trending towards the development of diversified appearance and practicality. OLED displays are gradually replacing LCD screens due to their wide color gamut, simpler screen structure, thinner, and better curvature. [0003] Optically Clear Adhesive (OCA) is an important material for bonding display covers and display modules. It not only plays the role of bonding, but also has the effect of increasing (eliminating the problem of whitening and fogging the screen display caused by the difference in refraction in the air gap) and buf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J7/30C08F220/18C08F220/36C08F220/56C08F220/20C08F222/14C08F220/06C08F222/20
CPCC09J133/26C09J133/14C09J7/30C08F220/1811C08F220/1808C08F220/36C08F220/56C08F220/20C08F220/1818C08F222/102C08F220/1812C08F220/1804C08F220/06Y02E10/50
Inventor 朱敏芳朱蓉刘齐文杨春强
Owner SUZHOU FINESET MATERIAL TECH CO LTD