CN115537164B - Capacitive touch screen full-lamination liquid optical cement and application thereof - Google Patents

Capacitive touch screen full-lamination liquid optical cement and application thereof Download PDF

Info

Publication number
CN115537164B
CN115537164B CN202211219272.1A CN202211219272A CN115537164B CN 115537164 B CN115537164 B CN 115537164B CN 202211219272 A CN202211219272 A CN 202211219272A CN 115537164 B CN115537164 B CN 115537164B
Authority
CN
China
Prior art keywords
touch screen
parts
liquid optical
capacitive touch
photoinitiator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202211219272.1A
Other languages
Chinese (zh)
Other versions
CN115537164A (en
Inventor
吴文琦
牛森
先真
孙中昊
鲁琰涵
秦海婧
李博瑶
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhenping Power Supply Co Of State Grid Henan Electric Power Co
Original Assignee
Zhenping Power Supply Co Of State Grid Henan Electric Power Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhenping Power Supply Co Of State Grid Henan Electric Power Co filed Critical Zhenping Power Supply Co Of State Grid Henan Electric Power Co
Priority to CN202211219272.1A priority Critical patent/CN115537164B/en
Publication of CN115537164A publication Critical patent/CN115537164A/en
Application granted granted Critical
Publication of CN115537164B publication Critical patent/CN115537164B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
    • C09J163/10—Epoxy resins modified by unsaturated compounds
    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Abstract

The invention discloses a full-lamination liquid optical adhesive for a capacitive touch screen and application thereof, belonging to the technical field of optical adhesives, and comprising the following components: prepolymer: epoxy acrylate, urethane acrylate; and (3) a photoinitiator: 1-hydroxy-cyclohexylbenzophenone, 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, isopropylphenyl cyclopentadienyl iron hexafluorophosphate; reactive diluent: isobornyl methacrylate, trimethylolpropane tetraacrylate. The liquid optical adhesive has excellent light transmittance, definition and adhesion, and excellent wet heat resistance and weather resistance, and greatly improves the safety, reliability, durability and aesthetic property of the whole touch screen, and effectively maintains the stability and long-term use of the touch screen.

Description

Capacitive touch screen full-lamination liquid optical cement and application thereof
Technical Field
The invention relates to the technical field of capacitive touch screens, in particular to a full-lamination liquid optical adhesive for a capacitive touch screen and application thereof.
Background
The capacitive touch screen technology works by utilizing current induction of a human body, and can be generally divided into 3 parts from the structure, namely a protective glass, a touch screen and an LCD display screen from top to bottom. The three parts need to be bonded in alignment, generally two times of bonding are needed, one time of bonding is needed between the protective glass and the touch screen, and the other time of bonding is needed between the display screen and the touch screen. The method can be divided into a full-lamination mode and a frame lamination mode according to lamination modes, wherein the frame lamination mode is often adopted between a display screen and a touch screen, the frame lamination process is simple and the cost is low, but because an air layer exists between the display screen and the touch screen, the display effect is greatly reduced after light reflection. The full lamination is to completely adhere the display screen and the touch screen together in a seamless mode. Since the air layer is eliminated, a better display effect can be provided compared with the frame patch. The liquid optical adhesive is commonly used for full lamination, has good adhesive strength, can be cured rapidly by ultraviolet rays, can be cured at normal temperature or medium temperature, and has the characteristics of small curing shrinkage, yellowing resistance and the like.
The liquid optical cement may be classified into acrylic optical cement, polyurethane optical cement, epoxy optical cement, silicone optical cement, and the like according to the type of the main resin. The optical adhesive of different main resins has different performance characteristics, for example, the adhesive surface of polyurethane is wider, but the moisture resistance is obviously insufficient, the epoxy optical adhesive has higher adhesive strength, but the line shrinkage is larger, the disconnection of a conductive line is easy to cause, and the temperature resistance of silicone is extremely excellent, but the epoxy optical adhesive has little resistance to the corrosion of solvents. The acrylic is between the systems, has higher optical performance, and is especially suitable for bonding optical devices. Therefore, it is necessary to develop a liquid optical adhesive suitable for full lamination of a touch screen and excellent in comprehensive performance.
Patent document with publication number CN111808534A discloses an ultraviolet light curing liquid optical cement, and a preparation method and application thereof. The local solid shrinkage rate of the ultraviolet light curing liquid optical adhesive is below 0.6%. The ultraviolet light curing liquid optical adhesive comprises tackifying resin, active oligomer, active diluent and photoinitiator. The ultraviolet light curing liquid optical adhesive can reduce curing shrinkage and reduce yellow spots in the laminating process of the liquid crystal touch screen. However, the liquid optical cement is solidified by two steps, the steps are complex, and the comprehensive effect is required to be improved.
The patent document with the publication number of CN113214743A discloses an optical adhesive for bonding a touch display screen and a preparation method thereof, and the optical adhesive consists of three layers of thermal composite structures, namely EVA optical adhesive of a middle layer, and first-layer OCA adhesive and second-layer OCA adhesive which are compounded on two sides of the EVA optical adhesive, wherein the first-layer OCA adhesive is externally covered with a first-layer PET release film, and the second-layer OCA adhesive is externally covered with a second-layer PET release film. The optical collagen material is simple and easy to obtain, the preparation method is easy to operate, the compactness of the joint is improved through grafting modification, and the curing shrinkage and yellowing resistance are required to be improved.
Disclosure of Invention
Accordingly, the present invention is directed to a liquid optical adhesive for capacitive touch screen and an application thereof, so as to solve the above-mentioned problems.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a full-lamination liquid optical cement for a capacitive touch screen comprises the following components:
prepolymer: epoxy acrylate, urethane acrylate;
and (3) a photoinitiator: 1-hydroxy-cyclohexylbenzophenone, 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, isopropylphenyl cyclopentadienyl iron hexafluorophosphate;
reactive diluent: isobornyl methacrylate, trimethylolpropane tetraacrylate.
Further, the weight portions of the components are as follows:
prepolymer: 35-45 parts of epoxy acrylate and 10-15 parts of polyurethane acrylate;
and (3) a photoinitiator: 1.2-2 parts of 1-hydroxy-cyclohexyl benzophenone, 0.2-0.5 part of 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide and 0.1-0.3 part of isopropylphenyl cyclopentadienyl iron hexafluorophosphate;
reactive diluent: 15-20 parts of isobornyl methacrylate and 8-12 parts of trimethylolpropane tetra-acrylate.
Further, the paint also comprises the following additives in parts by weight: 0.2 to 0.8 part of p-toluenesulfonic acid, 1.3 to 2 parts of coupling agent, 5 to 8 parts of plasticizer, 0.5 to 1.2 parts of antioxidant and 0.1 to 0.4 part of polymerization inhibitor.
Further, the coupling agent is a silane coupling agent KH560 or KH570.
Further, the plasticizer is one or more of tri (2-ethylhexyl) phosphate, dioctyl sebacate and poly (1, 2-propylene adipate).
Further, the plasticizer comprises the following components in percentage: 25-39% of tri (2-ethylhexyl) phosphate, 56-70% of dioctyl sebacate and 1-6% of poly (1, 2-propylene glycol) adipate.
Further, the antioxidant is an antioxidant 1010 or 1076.
Further, the polymerization inhibitor is benzene diphenol and/or p-methoxyphenol.
Further, in the polymerization inhibitor, the percentage content of each component is as follows: 40-50% of benzenediol and 50-60% of p-methoxyphenol.
Further, the application of the full-lamination liquid optical adhesive in lamination of the touch screen panel is disclosed.
The ultraviolet curing technology refers to that under the irradiation of ultraviolet light, active groups of a substance containing photoactive groups are decomposed, unsaturated bonds and the like in reactants are promoted to be cracked, a series of polymerization reactions are generated, and thus, a reticular macromolecular structure is formed through crosslinking. Ultraviolet light curing is the most important one in the radiation curing technology, and has the characteristics of high efficiency, wide adaptability, economy and environmental protection. The liquid optical adhesive is widely applied by adopting ultraviolet curing technology, and the optical adhesive generally comprises main components such as prepolymer, photoinitiator, active diluent and the like, wherein under the irradiation of ultraviolet light with proper wavelength and light intensity, the photoinitiator rapidly generates free radicals or cations so as to induce the prepolymer and the active diluent to polymerize and crosslink into a reticular structure, thereby bonding the prepolymer and the active diluent with an adhered material.
The two most common types of photoinitiators are free radical systems and cationic systems, which can be divided into two types: cleavage type and hydrogen abstraction type. Wherein, the cleavage type is a common type, and the photoinitiator achieves the energy of transition from a ground state to an excited state after absorbing light radiation, so that the photoinitiator is decomposed into innumerable active fragments, and the active fragments trigger monomers containing active groups to generate polymerization reaction, crosslink and solidify, thereby catalyzing and polymerizing the whole substance. Cationic photoinitiators, photoactivated to bring the molecule to an excited state, do not generate reactive fragments after decomposition, but generate protonic acids or lewis acids, thereby initiating the cross-linking polymerization of cationic monomers. That is, since the cationic photoinitiator needs to initiate polymerization in two steps, the curing speed of the cationic photoinitiator is low, and the radical photoinitiator is commonly used and mature in the test by ordinary technicians, so that the cationic photoinitiator is generally not used in the fully-adhered liquid optical adhesive for improving the curing speed. The inventor of the present application found that, even if two free radical photoinitiators are used, the volume shrinkage is larger, the deep curing is poor, and the like, and the cationic photoinitiator can make up for the defects, but belongs to different curing modes, the curing rates of the two modes are inconsistent, and even if the two curing modes are matched, the curing effect is still not ideal, so that the combination of the two curing modes is not easily thought of by a person skilled in the art.
The invention has the following beneficial effects:
according to the invention, epoxy acrylate and polyurethane acrylate are adopted as prepolymers, and acrylic acid groups with photoactive groups are introduced while the epoxy acrylate has epoxy active groups, so that the epoxy acrylate has the water resistance, heat resistance and good bonding performance of epoxy resin, and when the epoxy acrylate is used as the prepolymers, the obtained product has good heat resistance, corrosion resistance and the like, and has more side chain groups and stronger bonding performance. However, the groups in the chain also lead to poor flexibility of the prepolymer, and degradation and fragmentation are liable to occur. The polyurethane acrylate is different from epoxy acrylate in that the polyurethane acrylate is not directly reacted with acrylic acid in the synthesis process, isocyanate groups in polyurethane react with hydroxyl groups in hydroxyl acrylate to generate carbamate groups, polyurethane acrylate prepolymers with different performances are obtained through selection and proportion of different raw materials, the polyurethane has good tensile property and better toughness, the tensile strength, the volume shrinkage and the adhesive force of a system are improved, and after the acrylate is introduced, the advantages are combined, so that the excellent comprehensive effect is achieved.
The photoinitiator adopts a mode of combining a free radical photoinitiator and a cationic initiator, and the free radical photoinitiator 1-hydroxy-cyclohexyl benzophenone and the 2,4, 6-trimethyl benzoyl-diphenyl phosphine oxide are all cracked, so that more free radicals are generated, and the curing rate is increased. 1-hydroxy-cyclohexyl benzophenone is a high-efficiency free radical solid photoinitiator without yellowing, has good non-yellowing property, and has very small yellowing degree due to no benzyl generated by photolysis even if the cured product is exposed to sunlight for a long time. The 2,4, 6-trimethyl benzoyl-diphenyl phosphine oxide is a high-efficiency free radical photoinitiator, has longer absorption peak, can generate two free radicals of benzoyl and phosphoryl after illumination, can initiate polymerization, has high photocuring speed, has a photo-bleaching effect, has low volatilization, has a wide absorption range, does not yellow, has low post polymerization effect and has no residue. The isopropylbenzene-based cyclopentadienyl iron hexafluorophosphate is taken as a cationic photoinitiator, and after light absorption and decomposition, isopropylbenzene and cyclopentadienyl iron Lewis acid are generated to initiate cationic polymerization, so that the polymerization is not influenced by oxygen polymerization inhibition, the volume shrinkage rate is small, and the bonding strength is high. The method has the advantages that the oxidation and the excitation of the isopropylphenyl cyclopentadienyl iron hexafluorophosphate are carried out by adding cyclohexanone peroxide, the curing rate is improved, and the obtained optical adhesive is fast in curing speed, small in shrinkage and excellent in optical performance by combining with two free radical photoinitiators.
The reactive diluent isobornyl methacrylate is monofunctional, the trimethylolpropane tetra-acrylate is polyfunctional, and the reactive diluent isobornyl methacrylate and the trimethylolpropane tetra-acrylate are combined to increase the conversion rate, improve the curing speed, improve the toughness and control the shrinkage rate. In the additive, the p-toluenesulfonic acid is combined with the photoinitiator, so that the reaction speed is increased, and the curing efficiency is improved. The silane coupling agent KH560 or KH570 increases intermolecular force and improves bonding strength. The plasticizer tri (2-ethylhexyl) phosphate has the advantages of excellent low temperature resistance and weather resistance, dioctyl sebacate, good low temperature resistance and low volatility, and the poly (1, 2-propanediol adipate) is prepared by condensing dibasic acid and dihydric alcohol and then blocking by monohydric alcohol, and has good heat resistance and durability. Antioxidants 1010 and 1076 improve oxidation resistance and yellowing resistance. And the polymerization inhibitor of the benzenediol and the p-methoxyphenol stops or delays the substances polymerized in the storage or carrying process of the liquid optical cement, so that the storage stability is improved.
The liquid optical adhesive has excellent light transmittance, definition and adhesion, and excellent wet heat resistance and weather resistance, and greatly improves the safety, reliability, durability and aesthetic property of the whole touch screen, and effectively maintains the stability and long-term use of the touch screen.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention are clearly and completely described below. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
A full-lamination liquid optical cement for a capacitive touch screen comprises the following components:
prepolymer: 35-45 parts of epoxy acrylate and 10-15 parts of polyurethane acrylate;
and (3) a photoinitiator: 1.2-2 parts of 1-hydroxy-cyclohexyl benzophenone, 0.2-0.5 part of 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide and 0.1-0.3 part of isopropylphenyl cyclopentadienyl iron hexafluorophosphate;
reactive diluent: 15-20 parts of isobornyl methacrylate and 8-12 parts of trimethylolpropane tetra-acrylate.
Preferably, the additive also comprises the following components in parts by weight: 0.2 to 0.8 part of p-toluenesulfonic acid, 1.3 to 2 parts of coupling agent, 5 to 8 parts of plasticizer, 0.5 to 1.2 parts of antioxidant and 0.1 to 0.4 part of polymerization inhibitor.
The coupling agent is silane coupling agent KH560 or KH570.
The plasticizer is one or more of tri (2-ethylhexyl) phosphate, dioctyl sebacate and poly (1, 2-propylene glycol) adipate.
The plasticizer comprises the following components in percentage: 25-39% of tri (2-ethylhexyl) phosphate, 56-70% of dioctyl sebacate and 1-6% of poly (1, 2-propylene glycol) adipate.
The antioxidant is antioxidant 1010 or 1076.
The polymerization inhibitor is benzene diphenol and/or p-methoxyphenol.
The polymerization inhibitor comprises the following components in percentage: 40-50% of benzenediol and 50-60% of p-methoxyphenol.
The capacitive touch screen full-lamination liquid optical adhesive is applied to lamination of a touch screen panel.
Marking prepolymer as component a, photoinitiator as component b, and activator as component c, wherein, marking, prepolymer a: epoxy acrylate a1 and urethane acrylate a2;
photoinitiator b: 1-hydroxy-cyclohexylbenzophenone b1, 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide b2, isopropylphenyl cyclopentadienyl iron hexafluorophosphate b3;
reactive diluent c: isobornyl methacrylate c1, trimethylolpropane tetra-acrylate c2.
The additive is a component d, the p-toluenesulfonic acid is a component d1, the coupling agent is a component d2, the plasticizer is a component d3, the antioxidant is a component d4, and the polymerization inhibitor is a component d5;
coupling agent d2: KH560 d21 or KH570 d22;
and (3) a plasticizer d3: tri (2-ethylhexyl) phosphate d31, dioctyl sebacate d32, poly (1, 2-propylene glycol) adipate d33.
And (2) an antioxidant d4: 1010 d41, 1076 d42.
Polymerization inhibitor d5: benzene diphenol d51, p-methoxyphenol d52.
The parts by weight of the components in examples 1-6 are shown in Table 1 and the parts by weight of the components in examples 7-18 are shown in Table 2.
Examples 1 to 6
TABLE 1
Examples a:a1/a2 b:b1/b2/b3 c:c1/c2
1 45:35/10 1.5:1.2/0.2/0.1 23:15/8
2 48:37/11 1.8:1.4/0.3/0.1 25：16/9
3 51:39/12 2:1.5/0.3/0.2 26：17/9
4 54:41/13 2.2:1.6/0.4/0.2 28：18/10
5 57:43/14 2.5:1.8/0.4/0.3 30：19/11
6 60:45/15 2.8:2/0.5/0.3 32：20/12
In embodiments 1 to 6, the preparation method of the liquid optical adhesive for full lamination of the capacitive touch screen comprises the following steps:
1. weighing prepolymer, photoinitiator and reactive diluent according to a certain proportion;
2. adding the prepolymer and the reactive diluent into a reaction kettle, stirring for 1h at 40+/-2 ℃ at 200r/min, adding the photoinitiator, and stirring for 2h at 300 r/min;
3. defoaming by a vacuum pump, standing for 1h at normal temperature, and filtering.
Examples 7 to 18
TABLE 2
Examples d1 d2:d21/d22 d3:d31/d32/d33 d4:d41/d42 d5:d51/d52
7 0.2 1.3:0/1.3 5:0/5/0 0.5:0.5/0 0.1:0.1/0
8 0.3 1.4:1.4/0 5: 1.25/3.5/0.25 0.6:0/0.6 0.1:0.045/0.055
9 0.4 1.5:0/1.5 5:1.75/3.1/0.15 0.7:0.7/0 0.1:0.05/0.05
10 0.4 1.5:1.5/0 6:1.8/4.14/0.06 0.7:0/0.7 0.2:0.08/0.12
11 0.5 1.6:0/1.6 6:2.1/3.72/0.18 0.8:0.8/0 0.2:0.09/0.11
12 0.6 1.6:1.6/0 6:2.28/3.36/0.36 0.8:0/0.8 0.2:0.1/0.1
13 0.5 1.7:0/1.7 7:2.1/4.83/0.07 0.9:0.9/0 0.3:0.12/0.18
14 0.6 1.7:1.7/0 7:2.45/4.34/0.21 0.9:0/0.9 0.3:0.135/0.165
15 0.7 1.8:0/1.8 7:2.66/3.92/0.42 1.0:1.0/0 0.3:0.15/0.15
16 0.6 1.8:1.8/0 8:2.8/4.96/0.24 1.0:0/1.0 0.4:0.16/0.24
17 0.7 1.9:0/1.9 8:3.04/4.48/0.48 1.1:1.1/0 0.4:0.18/0.22
18 0.8 2.0:2.0/0 8:3.12/4.56/0.32 1.2:0/1.2 0.4:0.2/0.2
Examples 7 to 18 refer to examples 1 to 6, wherein examples 7 and 8 have the same parts by weight of prepolymer, photoinitiator and reactive diluent as example 1, examples 9 and 10 have the same parts by weight of prepolymer, photoinitiator and reactive diluent as example 2, examples 11 and 12 have the same parts by weight of prepolymer, photoinitiator and reactive diluent as example 3, examples 13 and 14 have the same parts by weight of prepolymer, photoinitiator and reactive diluent as example 4, examples 15 and 16 have the same parts by weight of prepolymer, photoinitiator and reactive diluent as example 5, and examples 17 and 18 have the same parts by weight of prepolymer, photoinitiator and reactive diluent as example 6.
Example 19
The embodiment provides a liquid optical adhesive for full lamination of a capacitive touch screen, which is the same as embodiment 9, but is different from embodiment 9 in that in the embodiment, 1.8 parts by weight of a photoinitiator, 1.3 parts by weight of 1-hydroxy-cyclohexyl benzophenone, 0.3 parts by weight of 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, 0.15 parts by weight of isopropylphenyl cyclopentadienyl iron hexafluorophosphate and 0.05 parts by weight of cyclohexanone peroxide are provided.
Example 20
The embodiment provides a liquid optical adhesive for full lamination of a capacitive touch screen, which is the same as embodiment 11, but is different from embodiment 11 in that in the embodiment, 2 parts by weight of a photoinitiator is provided, wherein 1.4 parts of 1-hydroxy-cyclohexyl benzophenone, 0.3 parts of 2,4, 6-trimethyl benzoyl-diphenyl phosphine oxide, 0.2 parts of isopropylphenyl cyclopentadienyl iron hexafluorophosphate and 0.1 part of cyclohexanone peroxide.
Example 21
The embodiment provides a liquid optical adhesive for full lamination of a capacitive touch screen, which is the same as embodiment 13, but is different from embodiment 13 in that in the embodiment, 2.2 parts by weight of a photoinitiator is provided, wherein 1.5 parts of 1-hydroxy-cyclohexyl benzophenone, 0.4 part of 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, 0.22 parts of isopropylphenyl cyclopentadienyl iron hexafluorophosphate and 0.08 parts of cyclohexanone peroxide.
In embodiments 7 to 21, the preparation method of the liquid optical adhesive for full lamination of the capacitive touch screen comprises the following steps:
1. weighing prepolymer, photoinitiator, reactive diluent and additive according to a certain proportion;
2. adding the prepolymer and the reactive diluent into a reaction kettle, stirring for 1h at 40+/-2 ℃ at 200r/min, adding the additive and the photoinitiator, and stirring for 2h at 300 r/min;
3. defoaming by a vacuum pump, standing for 1h at normal temperature, and filtering.
Comparative example 1
The embodiment provides a liquid optical adhesive for full lamination of a capacitive touch screen, which is the same as in embodiment 1, but is different from embodiment 1 in that the photoinitiator comprises 1.4 parts by weight, 1.2 parts of 1-hydroxy-cyclohexyl benzophenone and 0.2 parts of 2,4, 6-trimethyl benzoyl-diphenyl phosphine oxide.
Comparative example 2
This example provides a liquid optical adhesive for full-lamination of capacitive touch screen, which is the same as in example 7, but different from example 7 in that the photoinitiator is 1.4 parts by weight, 1.2 parts of 1-hydroxy-cyclohexyl benzophenone and 0.2 parts of 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide.
Comparative example 3
The embodiment provides a full-lamination liquid optical adhesive for a capacitive touch screen, which is the same as in embodiment 1, but is different from embodiment 1 in that the photo initiator comprises, by weight, 3 parts of 1-hydroxy-cyclohexyl benzophenone 2 parts, 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide 0.6 parts and isopropylphenyl cyclopentadienyl iron hexafluorophosphate 0.4 parts.
Comparative example 4
This example provides a liquid optical adhesive for full lamination of capacitive touch panels, which is the same as example 7, but different from example 7, the comparative example does not contain p-toluenesulfonic acid.
The capacitive touch screen full-lamination liquid optical adhesive is applied to the lamination of a touch screen panel, the liquid optical adhesive is coated on the touch screen, then protective glass or a display screen is laminated, ultraviolet radiation is used, and finally, the touch screen is kept stand for 5-6 hours at room temperature.
Performance test:
bond strength, as measured in accordance with GB/T31541-2015; total volume shrinkage, light transmittance according to GB/T24148-2014, light transmittance by a light transmittance meter DR81, yellowing index, and GB/T7921-2008 are shown in Table 3.
TABLE 3 Table 3
Bond strength MPa Total volume shrinkage% Yellowing index
Example 1 0.58 0.33 0.52
Example 2 0.58 0.35 0.53
Example 3 0.57 0.33 0.52
Example 4 0.58 0.34 0.55
Example 5 0.59 0.33 0.54
Example 6 0.57 0.33 0.53
Example 7 0.65 0.30 0.41
Example 8 0.67 0.29 0.41
Example 9 0.66 0.28 0.42
Example 10 0.68 0.27 0.41
Example 11 0.67 0.27 0.43
Example 12 0.68 0.29 0.41
Example 13 0.66 0.28 0.42
Example 14 0.67 0.28 0.43
Example 15 0.66 0.27 0.41
Example 16 0.68 0.28 0.42
Example 17 0.68 0.27 0.43
Example 18 0.67 0.27 0.42
Example 19 0.71 0.24 0.41
Example 20 0.71 0.25 0.40
Example 21 0.70 0.25 0.40
Comparative example 1 0.55 0.48 0.52
Comparative example 2 0.61 0.45 0.42
Comparative example 3 0.45 0.36 0.55
Comparative example 4 0.59 0.32 0.41
The liquid optical adhesives of examples 1-21 and comparative examples 1-4 were tested to have a light transmittance of 99.0% or more, and cured under ultraviolet light irradiation for 24-30 seconds for examples 1-21, 29-30 seconds for examples 1-6, 26-28 s for examples 7-18, 25 seconds for example 19-21, 25s and 25s for example, and 27-s, 25s, 26 s and 29 s for comparative examples 1-4. As can be seen from the combination of Table 3, the adhesive strength of the invention is 0.57-0.71Mpa, the total volume shrinkage is 0.35-0.24%, the yellowing index is 0.52-0.40, and the combination property is excellent. Comparative examples 1 and 2 lack cumyl cyclopentadienyl iron hexafluorophosphate, the volume shrinkage is larger, the bonding strength is slightly reduced, comparative example 3 increases the content of the photoinitiator, the bonding strength and yellowing resistance are both reduced, the photoinitiator is excessive and can remain in the adhesive layer, the adhesive layer is easy to yellow, the surface and the internal polymerization rate of the adhesive layer are inconsistent, the internal stress of the adhesive layer is uneven, and the bonding strength is affected; comparative example 4 lacks p-toluene sulfonic acid, the adhesive strength is slightly reduced, the curing time is increased, and the performance of the liquid optical cement is affected.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the invention, and that equivalent modifications and variations of the invention in light of the spirit of the invention will be covered by the claims of the present invention.

Claims (6)

1. The utility model provides a full laminating liquid optical cement of capacitive touch screen which characterized in that: comprises the following components in parts by weight:
prepolymer: 35-45 parts of epoxy acrylate and 10-15 parts of polyurethane acrylate;
and (3) a photoinitiator: 1.2-2 parts of 1-hydroxy-cyclohexyl benzophenone, 0.2-0.5 part of 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide and 0.1-0.3 part of isopropylphenyl cyclopentadienyl iron hexafluorophosphate;
reactive diluent: 15-20 parts of isobornyl methacrylate and 8-12 parts of trimethylolpropane tetra-acrylate;
additive: 0.2 to 0.8 part of p-toluenesulfonic acid, 1.3 to 2 parts of coupling agent, 5 to 8 parts of plasticizer, 0.5 to 1.2 parts of antioxidant and 0.1 to 0.4 part of polymerization inhibitor;
the plasticizer is one or more of tri (2-ethylhexyl) phosphate, dioctyl sebacate and poly (1, 2-propylene glycol) adipate;
the polymerization inhibitor is benzenediol and/or p-methoxyphenol;
the preparation method of the capacitive touch screen full-lamination liquid optical adhesive comprises the following steps:
(1) Weighing prepolymer, photoinitiator, reactive diluent and additive according to a certain proportion;
(2) Adding the prepolymer and the reactive diluent into a reaction kettle, stirring for 1h at 40+/-2 ℃ at 200r/min, adding the additive and the photoinitiator, and stirring for 2h at 300 r/min;
(3) Defoaming by a vacuum pump, standing for 1h at normal temperature, and filtering.
2. The capacitive touch screen full-lamination liquid optical cement according to claim 1, wherein: the coupling agent is silane coupling agent KH560 or KH570.
3. The capacitive touch screen full-lamination liquid optical cement according to claim 2, wherein: the plasticizer comprises the following components in percentage: 25-39% of tri (2-ethylhexyl) phosphate, 56-70% of dioctyl sebacate and 1-6% of poly (1, 2-propylene glycol) adipate, wherein the sum of the percentages of the components is 100%.
4. The capacitive touch screen full-lamination liquid optical cement according to claim 3, wherein: the antioxidant is antioxidant 1010 or 1076.
5. The capacitive touch screen full-lamination liquid optical cement according to claim 4, wherein: the polymerization inhibitor comprises the following components in percentage: 40-50% of benzenediol and 50-60% of p-methoxyphenol.
6. Use of a capacitive touch screen full-fit liquid optical adhesive according to any of claims 1-4 in touch screen panel fit.
CN202211219272.1A 2022-10-08 2022-10-08 Capacitive touch screen full-lamination liquid optical cement and application thereof Active CN115537164B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211219272.1A CN115537164B (en) 2022-10-08 2022-10-08 Capacitive touch screen full-lamination liquid optical cement and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211219272.1A CN115537164B (en) 2022-10-08 2022-10-08 Capacitive touch screen full-lamination liquid optical cement and application thereof

Publications (2)

Publication Number Publication Date
CN115537164A CN115537164A (en) 2022-12-30
CN115537164B true CN115537164B (en) 2024-01-26

Family

ID=84732121

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211219272.1A Active CN115537164B (en) 2022-10-08 2022-10-08 Capacitive touch screen full-lamination liquid optical cement and application thereof

Country Status (1)

Country Link
CN (1) CN115537164B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104449419A (en) * 2014-12-05 2015-03-25 烟台泰盛精化科技有限公司 Ultraviolet-heat dual curing optical adhesive containing epoxidized polybutadiene resin
CN106244030A (en) * 2016-07-28 2016-12-21 江苏乘鹰新材料股份有限公司 Photocurable adhesive compositions for cold transfer and preparation method thereof
CN111234712A (en) * 2019-12-23 2020-06-05 深圳日高胶带新材料有限公司 UV-cured optical pressure-sensitive adhesive and preparation method thereof
CN113897168A (en) * 2021-10-26 2022-01-07 湖北大学 UV (ultraviolet) viscosity-reducing glue solution, single-side UV viscosity-reducing protective film and preparation method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103160212B (en) * 2011-12-19 2015-09-02 烟台德邦科技有限公司 A kind of ultraviolet light polymerization optical adhesive

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104449419A (en) * 2014-12-05 2015-03-25 烟台泰盛精化科技有限公司 Ultraviolet-heat dual curing optical adhesive containing epoxidized polybutadiene resin
CN106244030A (en) * 2016-07-28 2016-12-21 江苏乘鹰新材料股份有限公司 Photocurable adhesive compositions for cold transfer and preparation method thereof
CN111234712A (en) * 2019-12-23 2020-06-05 深圳日高胶带新材料有限公司 UV-cured optical pressure-sensitive adhesive and preparation method thereof
CN113897168A (en) * 2021-10-26 2022-01-07 湖北大学 UV (ultraviolet) viscosity-reducing glue solution, single-side UV viscosity-reducing protective film and preparation method

Also Published As

Publication number Publication date
CN115537164A (en) 2022-12-30

Similar Documents

Publication Publication Date Title
KR101563764B1 (en) Bendable polycarbonate resin laminate, optically transparent electromagnetic wave shield laminate, and manufacturing method thereof
KR101142804B1 (en) Ultraviolet Hardening Polyurethane Adhesive Making Method
KR20090128490A (en) Light-transmitting electromagnetic-shielding laminate and method for producing the same, light-transmitting radio wave absorber, and adhesive composition
TW201406903A (en) Dual curable adhesive composition
US9412893B2 (en) Solar module and process for production thereof
JPH10338860A (en) Anisotrpoic conductive film
US8680171B2 (en) Method of encapsulating a photovoltaic cell and encapsulated photovoltaic cell
EP2770000A1 (en) Active-energy-ray-curable resin composition, adhesive, and laminate film
WO2012032880A1 (en) Wavelength-converting resin composition, sealing material for wavelength-conversion-type solar cell and process for production thereof, and solar cell module and process for production thereof
CN115466565B (en) Coating composition for packaging photovoltaic module, preparation method of composite material for packaging and photovoltaic module
CN115537164B (en) Capacitive touch screen full-lamination liquid optical cement and application thereof
CN102585755A (en) Solar component package material capable of being cured through ultraviolet
CN117106214A (en) Rapid crosslinking forming light photovoltaic module packaging front plate and preparation method thereof
JP2011153187A (en) Resin composition and photocoupler device
JP5707899B2 (en) Urethane resin having (meth) acryloyl group, active energy ray-curable adhesive containing the urethane resin, and solar cell back surface protective sheet
KR102002173B1 (en) Polymer Dispersed Liquid Crystal Film Comprising UV Curable Resins With Silicone―Based Acrylate and Urethane―Based Acrylate And Preparing Methods Thereof
CN111320958B (en) UV/thermal dual-curing adhesive for solar photovoltaic back panel and preparation method thereof
JP2557884B2 (en) Adhesive composition for glass lamination
CN115011302A (en) Environment-friendly UV (ultraviolet) laminated silver reflector plate
JP2001176335A (en) Anisotropic conductive film
KR20170059800A (en) Ultraviolet curable acrylic hybrid adhesive composition for acrylic panel lamination
CN110194943A (en) Uvioresistant acrylic acid modified polyurethane adhesive resistant to high temperature and preparation method thereof
CN108219690A (en) Ethylene vinyl acetate glued membrane and its corresponding packaging method for the high refractive index of encapsulation
KR101550756B1 (en) Adhesive composition for touch screen panel and adhesive film using the same
KR101907910B1 (en) Pressure sensitive adhesive tape comprising an ultraviolet curable adhesive composition having a low hardening shrinkage and a method for producing the same

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant