WO2024103441A1 - Colle ocr pulvérisable à ultra-faible viscosité pour module de stratification complète, et son procédé de préparation - Google Patents

Colle ocr pulvérisable à ultra-faible viscosité pour module de stratification complète, et son procédé de préparation Download PDF

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Publication number
WO2024103441A1
WO2024103441A1 PCT/CN2022/134939 CN2022134939W WO2024103441A1 WO 2024103441 A1 WO2024103441 A1 WO 2024103441A1 CN 2022134939 W CN2022134939 W CN 2022134939W WO 2024103441 A1 WO2024103441 A1 WO 2024103441A1
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WIPO (PCT)
Prior art keywords
acrylate
weight
parts
ultra
sprayable
Prior art date
Application number
PCT/CN2022/134939
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English (en)
Chinese (zh)
Inventor
金闯
梁哲会
冉光富
齐杰
丁豪杰
Original Assignee
太仓斯迪克新材料科技有限公司
江苏斯迪克新材料科技股份有限公司
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Publication of WO2024103441A1 publication Critical patent/WO2024103441A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B33/00—Packaging articles by applying removable, e.g. strippable, coatings
    • B65B33/04—Packaging large articles, e.g. complete machines, aircraft
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
    • C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the invention relates to the field of OCR glue, and in particular to an ultra-low-viscosity, sprayable OCR glue for a full film lamination set and a preparation method thereof.
  • Capacitive touch screens are made by coating a transparent thin-film conductive layer on a glass screen, and then adding a protective glass outside the conductive layer.
  • the double-glass design can completely protect the conductive layer and the sensor.
  • capacitive touch screens are mainly bonded using optical-grade pressure-sensitive adhesive tape (OCA).
  • the touch display integrated module is divided into three layers: display screen, touch screen and protective glass.
  • the three-layer integrated structure is formed by laminating. It can be laminated by full lamination or frame lamination.
  • the frame lamination mainly uses double-sided adhesive film to fix the four sides together, and there will be an air layer between the layers.
  • the full lamination technology uses OCA film or OCR glue to glue the screens together seamlessly, eliminating the air gap between the screens, greatly reducing the reflection of light, reducing the loss of transmitted light, and thus improving the brightness and enhancing the display effect.
  • the thickness of the fully laminated screen is reduced by more than 100 microns compared to the ordinary lamination method, making the body thinner and lighter.
  • the close combination of the touch screen and the display panel can not only improve the strength, but also effectively reduce the impact of noise on the touch screen, and improve the smoothness of the touch operation. It also helps with the narrow frame design, making the frame narrower.
  • OCA Optically clear pressure-sensitive adhesive tape
  • OCA Optically clear pressure-sensitive adhesive tape
  • It has the advantages of optical transparency, high transmittance, good bonding strength, no special requirements for the substrate of the bonding product, uniform thickness, high production efficiency, no glue overflow problem, controllable bonding area, no corrosion problem, etc. It is particularly suitable for bonding small-sized products; however, there are problems such as difficulty in rework, need to be cut according to the shape and size of the substrate, easy to cause the adhesive material to fall off, insufficient contact between the adhesive layer and the bonding surface, or easy mixing of bubbles or dents on the bonding surface.
  • Liquid optically clear adhesive is colorless and transparent, has high transmittance, good bonding strength, and can be cured under light or heat conditions. It can be used for laminating flat, curved and uneven surfaces, especially for large-size lamination; it has special advantages over OCA film in terms of regular shapes, sizes, gaps and comprehensive costs of laminating surfaces, and can solve the limitations of OCA film.
  • patent CN 102426494 A introduces block olefins into acrylic resin to greatly improve the adhesion of OCR glue, but the disadvantage is also obvious.
  • the viscosity of the product is too high to be sprayed;
  • patent CN 114316895 A uses a silicone system to prepare OCR glue, which greatly improves the optical properties and chemical resistance, but the high viscosity is still a major defect that makes it impossible to spray.
  • Patent CN 113831848 A uses an acrylic system and has a low viscosity that can be sprayed, but there is only a description of tg ⁇ 0°C without a specific numerical value.
  • the relatively high glass transition temperature is obviously not conducive to peel strength.
  • the patented product does not describe or reflect the peel strength.
  • the first object of the present invention is to provide an ultra-low viscosity, sprayable OCR glue for a fully laminated module, which is composed of the following raw materials in weight ratio:
  • the auxiliary agent is a defoamer, a wetting and dispersing agent, an adhesion promoter or a silane coupling agent;
  • the acrylic resin is at least one of polyurethane acrylate, epoxy acrylate, polyester acrylate and polyolefin acrylate.
  • the photoinitiator is at least one of 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-propanone, benzoin dimethyl ether, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and 2,4,6-trimethylbenzoylphenylphosphonic acid ethyl ester.
  • the photoinitiator is a combination of 1-hydroxycyclohexyl phenyl ketone (184) and photoinitiator 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO).
  • TPO 2,4,6-trimethylbenzoyl-diphenylphosphine oxide
  • the acrylic monomer is at least one of isobornyl acrylate, tetrahydrofuran acrylate, silane acrylate, lauric acid acrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, butyl acrylate, 4-(1-oxo-2-propenyl)morpholine, stearic acid acrylate, isooctyl acrylate, and isodecyl acrylate.
  • the acrylic monomer is isodecyl acrylate or a mixture comprising isodecyl acrylate.
  • the antioxidant is a hindered phenol antioxidant.
  • the present invention also relates to a method for preparing the ultra-low viscosity, sprayable OCR glue for a full lamination set as described above, comprising the following steps:
  • step S1 mixing is performed under the conditions of being protected from light and having a humidity of less than 50%.
  • step S1 acrylic resin, acrylic monomer, photoinitiator, antioxidant and auxiliary agent are weighed in parts by weight and mixed, and stirred at a speed of 500 RPM for 30 minutes using a high-speed disperser to obtain a uniform mixed solution.
  • the beneficial effect of the present invention is that the present invention provides an ultra-low viscosity, sprayable OCR glue for full lamination modules, which is composed of the following raw materials in weight ratio: 15-25 parts of acrylic resin; 65-80 parts of acrylic monomer; 0.5-4 parts of photoinitiator; 0.1-0.5 parts of antioxidant; 0.1-0.5 parts of auxiliary agent; wherein the auxiliary agent is a defoamer, a wetting dispersant, an adhesion promoter or a silane coupling agent; the acrylic resin is one or more of polyurethane acrylate, epoxy acrylate, polyester acrylate and polyolefin acrylate.
  • the present invention also relates to a preparation method of the OCR glue, and the OCR glue prepared thereby has high bonding strength, high elongation, good optical properties, stable modulus under heavy and high temperature, low tg, and is suitable for Inkjet spraying viscosity.
  • the present invention relates to an ultra-low-viscosity, sprayable OCR glue for a fully-fitted module, which is composed of the following raw materials in the following weight ratio:
  • the additive is a defoamer, a wetting and dispersing agent, an adhesion promoter or a silane coupling agent; specifically, the additive can be BYK-088, BYK A530, BYK DISPER 163, BYK 3550, BYK 4500, BYK 4510, A187, A1120, A174, etc.;
  • Acrylic resin is a mixture of one or more of polyurethane acrylate, epoxy acrylate, polyester acrylate and polyolefin acrylate; the molecules of acrylic resin contain a variety of characteristic functional groups, so that the cured OCR glue has excellent wear resistance, adhesion, flexibility, peel strength, low temperature resistance, optical properties and weather resistance.
  • the acrylic resin can be CN9004, CN152, CN153, CN2273, CN9023, CN9021, CN9018, etc.
  • the present invention fully cooperates with each other, takes the advantages and makes up for the shortcomings, and the OCR glue obtained has excellent properties; and in the process of touch screen production, it can be sprayed and fully bonded efficiently, and there will be no air residue between the screens, fast curing speed, high production efficiency, extremely low viscosity, high peel strength, good light transmittance, low haze, stable medium and high temperature modulus, good yellowing resistance, and has excellent usability and curing performance.
  • OCR glue can be prepared using silicone system theory to a certain extent, but excessive viscosity is always a problem that needs to be solved for efficient spraying.
  • Acrylic resin 15-25 parts The acrylic resin content within this weight range plays a very important role in peel strength. Too low will cause a sharp drop in peel strength, and too high will cause an increase in viscosity.
  • the photoinitiator is one or a mixture of 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexylphenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-propanone, benzoin dimethyl ether, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 2,4,6-trimethylbenzoylphenylphosphonic acid ethyl ester.
  • the photoinitiator is a combination of 1-hydroxycyclohexylphenyl ketone (184) and photoinitiator 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO).
  • the acrylic monomer is one or a mixture of one or more of isobornyl acrylate, tetrahydrofuran acrylate, silyl acrylate, lauric acid acrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, butyl acrylate, 4-(1-oxo-2-propenyl)morpholine, stearic acid acrylate, isooctyl acrylate, and isodecyl acrylate.
  • the acrylic monomer is isodecyl acrylate or a mixture containing isodecyl acrylate; the use of the long-chain monomer isodecyl acrylate SR395 provides a guarantee for tg, and further provides a guarantee of modulus and adhesion.
  • the antioxidant may be a hindered phenol, a phosphite, a carbon radical scavenger, a metal passivator, etc.
  • the antioxidant in order to ensure thermal stability, not affect light curing, and contain no metal ions, the antioxidant is a hindered phenol antioxidant.
  • the present invention also relates to a method for preparing an ultra-low-viscosity, sprayable OCR glue for a full film lamination set, comprising the following steps:
  • the mixed liquid is vacuum degassed for 15 minutes to form a final product, which is a touch screen OCR glue with high bonding strength, high elongation, good optical performance, stable modulus under heavy and high temperatures, low tg, and suitable viscosity for Inkjet spraying.
  • step S1 mixing is performed under conditions of light protection and humidity less than 50%; because the product is light sensitive and needs to be protected from light, water vapor will cause incomplete curing, and the reaction can proceed smoothly when the humidity is below 50.
  • step S1 acrylic resin, acrylic monomer, photoinitiator, antioxidant, and additive are weighed by weight and mixed, and a high-speed disperser is used to fully stir at a speed of 500 RPM for 30 minutes to obtain a uniform mixed solution.
  • the above OCR glue preparation method is used to prepare a glue composition as shown in Table 2 below, and then tested.
  • Examples 1-3 and Comparative Examples 1-8 were respectively subjected to ultraviolet irradiation at a wavelength of UV-LED 365, with a cumulative energy of not less than 5000 mj;
  • Test method multifunctional continuous induction viscometer method; test instrument: DV2T LV; calibration: silicone oil standard liquid; test rotor: 61-64 or SC4-18; torque range: 40-60%; measurement temperature: 25°C.
  • Test instrument Anton Paar MCR302; Specimen size: cylinder with 8mm diameter and 1mm thickness; Temperature range: -50-100°C; Heating rate: 3°C/min; Deformation mode: shear mode; Test frequency: 1Hz.
  • Examples 1-3 The various properties of Examples 1-3 in which the components are reasonably matched in the present invention are excellent.
  • the content of acrylic resin is too low, and the peel strength of the product is poor, which may be due to the reduction of the content of the characteristic group that promotes adhesion and the reduction of the density of hydrogen bonds;
  • the content of acrylic resin is relatively high, and the comprehensive performance is good, but the viscosity of the product is significantly increased, which is not conducive to Inkjet spraying; in Comparative Example 3, only a single photoinitiator 184 is used, and the peel strength of the product is low, which is due to the lack of the synergistic effect of the initiator.
  • Comparative Example 4 only a single photoinitiator TPO is used, and the modulus of the product is significantly reduced, which is due to the insufficient efficiency of the single initiator.
  • Comparative Example 5 a combination of photoinitiators 184 and 1173 is used, and the peel strength of the product is low, which is due to the single effect of the combination.
  • Comparative Example 6 a combination of photoinitiators TPO and 1173 is used, and the modulus of the product is significantly reduced, which is due to the insufficient curing effect of the combination.
  • Comparative Example 7 a combination of photoinitiators 651 and 1173 is used, and the optical YI of the product is significantly increased, which is due to the yellowing of 651 in the combination.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

La présente invention concerne une colle OCR pulvérisable à ultra-faible viscosité pour un module de stratification complète. La colle OCR est préparée à partir des matières premières suivantes, en parties en poids : 15 à 25 parties d'une résine acrylique ; 65 à 80 parties d'un monomère acrylique ; 0,5 à 4 parties d'un photo-initiateur ; 0,1 à 0,5 partie d'un antioxydant ; et 0,1 à 0,5 partie d'un agent auxiliaire, l'agent auxiliaire étant un agent antimousse, un dispersant mouillant, un promoteur d'adhérence ou un agent de couplage de type silane ; et la résine acrylique étant un ou un mélange de plus d'un parmi un polyuréthane acrylate, un époxy acrylate , un polyester acrylate et un polyoléfine acrylate. La présente invention concerne en outre un procédé de préparation pour la colle OCR. La colle OCR préparée de cette façon présente une force de liaison élevée, un allongement élevé, une bonne performance optique, un module haute température fort stable et une faible Tg, et convient également à la viscosité de la pulvérisation à jet d'encre.
PCT/CN2022/134939 2022-11-16 2022-11-29 Colle ocr pulvérisable à ultra-faible viscosité pour module de stratification complète, et son procédé de préparation WO2024103441A1 (fr)

Applications Claiming Priority (2)

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CN202211472549.1 2022-11-16
CN202211472549.1A CN115926726A (zh) 2022-11-16 2022-11-16 超低粘、可喷涂的用于全贴膜组的ocr胶水及其制备方法

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Citations (7)

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Publication number Priority date Publication date Assignee Title
CN104263311A (zh) * 2014-09-04 2015-01-07 武汉华工图像技术开发有限公司 一种uv冷烫金胶水
CN104745140A (zh) * 2015-04-09 2015-07-01 广州惠利电子材料有限公司 玻璃增强uv胶及其制备方法
EP2960166A1 (fr) * 2013-05-08 2015-12-30 Nitto Denko Corporation Procédé de collage de feuille adhésive pour protection du verre
US20170174953A1 (en) * 2015-12-22 2017-06-22 Nulabel Technologies, Inc. Fluid activatable adhesives for glue-free, liner-free, labels for glass and plastic substrates and methods of use thereof
CN107090252A (zh) * 2017-04-19 2017-08-25 无锡云亭石墨烯技术有限公司 一种石墨烯uv固化胶的制备及其复合加热玻璃的应用
CN108517196A (zh) * 2018-04-16 2018-09-11 苏州市贝特利高分子材料股份有限公司 蓝宝石玻璃基材用可感光显影的特殊纹路转印胶及其制备方法
CN110776870A (zh) * 2019-09-25 2020-02-11 塔威新材料科技(上海)有限公司 光学塑料和玻璃粘接用uv胶及其制备方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108949091A (zh) * 2018-06-26 2018-12-07 深圳市宝力新材料有限公司 一种紫外线固化型粘合剂组合物以及制作工艺

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2960166A1 (fr) * 2013-05-08 2015-12-30 Nitto Denko Corporation Procédé de collage de feuille adhésive pour protection du verre
CN104263311A (zh) * 2014-09-04 2015-01-07 武汉华工图像技术开发有限公司 一种uv冷烫金胶水
CN104745140A (zh) * 2015-04-09 2015-07-01 广州惠利电子材料有限公司 玻璃增强uv胶及其制备方法
US20170174953A1 (en) * 2015-12-22 2017-06-22 Nulabel Technologies, Inc. Fluid activatable adhesives for glue-free, liner-free, labels for glass and plastic substrates and methods of use thereof
CN107090252A (zh) * 2017-04-19 2017-08-25 无锡云亭石墨烯技术有限公司 一种石墨烯uv固化胶的制备及其复合加热玻璃的应用
CN108517196A (zh) * 2018-04-16 2018-09-11 苏州市贝特利高分子材料股份有限公司 蓝宝石玻璃基材用可感光显影的特殊纹路转印胶及其制备方法
CN110776870A (zh) * 2019-09-25 2020-02-11 塔威新材料科技(上海)有限公司 光学塑料和玻璃粘接用uv胶及其制备方法

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