CN115960542A - OCA optical cement and preparation method thereof - Google Patents
OCA optical cement and preparation method thereof Download PDFInfo
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- CN115960542A CN115960542A CN202211743152.1A CN202211743152A CN115960542A CN 115960542 A CN115960542 A CN 115960542A CN 202211743152 A CN202211743152 A CN 202211743152A CN 115960542 A CN115960542 A CN 115960542A
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Abstract
The invention relates to the technical field of optical cement, and discloses OCA (optical clear adhesive) and a manufacturing method thereof. The raw materials for preparing the OCA optical adhesive comprise, by weight, 50-85 parts of an acrylic resin prepolymer, 20-40 parts of an acrylic reactive diluent, 0.1-0.5 part of an antioxidant, 0.05-0.5 part of a silane coupling agent, 0.1-0.5 part of a crosslinking agent and 0.5-3 parts of a photoinitiator. The OCA optical adhesive has better adhesive force and higher yellowing resistance, and can meet the long-term use requirement of a special adhesive for cementing transparent optical elements.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to an optical cement, and more particularly relates to an OCA optical cement and a manufacturing method thereof.
Background
OCA optical glues are typically specialty adhesives used to bond transparent optical elements. The OCA optical cement is classified into two types, one is a resistive type and the other is a capacitive type, the resistive type optical cement is classified into 50um and 25um according to thickness, and the capacitive type optical cement is classified into 100um, 175um, 200um and 250um. OCA optical cement can be applied to different fields according to thickness, and the main application thereof is as follows: electronic paper, transparent device bonding, projection screen assemblies, aerospace or military optical device assemblies, display assemblies, lens assemblies, resistive touch screens (G + F or F + F), capacitive touch screens, panels, icons, and plastic materials such as glass and polycarbonate. The OCA optical cement is one of important raw materials of the touch screen and is the best adhesive of the touch screen at present. OCA optical adhesives are typically double-sided laminated tapes, without a substrate, made by making an optical acrylic adhesive and laminating a peelable film on each side. The adhesive is colorless and transparent, has light transmittance of over 90 percent and good bonding strength, can be cured at room temperature or middle temperature, and has the characteristic of small curing shrinkage.
The color of the OCA optical cement is yellow due to the fact that the OCA optical cement is usually exposed to natural light, ultraviolet rays, heat, oxygen, stress, chemical etching, moisture and the like, and improper production processes and other factors may exist. The concrete points are as follows: (1) The bonding energy exists among macromolecular chain bonds of the polymer in the OCA optical adhesive, when the provided energy is greater than the bonding energy, the molecular chain is easy to generate activity concentration, and the polymer is gradually degraded in the using and storing processes to cause yellowing; (2) After the OCA optical adhesive absorbs light energy, a molecular chain on an absorption part can generate the cracking of a carbon-carbon bond or a carbon-hydrogen bond, so that the yellowing phenomenon is generated; (3) OCA optical adhesive can generate oxidation reaction along with the long-term use time, the heat can accelerate the oxidation process of the material, after a peroxidation structure is formed, free radicals are easily formed, the transparent, light-colored or white material is discolored, the damage effect of oxygen on unsaturated diene materials is most obvious, and the thermal effect can not only activate oxidation, but also cause the breakage of a-C-bond and the breakage of a double bond to cause the yellowing of the material; (4) Yellowing is also related to the addition of additives, moisture, impurities and processing and production processes in the OCA optical adhesive, and the stability of the polymer is reduced by mixing various chemical or mechanical impurities into the raw materials, so that the adhesive is yellowed.
The use of the OCA optical adhesive is greatly limited due to yellowing, so that the technical problem which needs to be solved urgently in the industry is to provide the OCA optical adhesive with yellowing resistance and good adhesion performance.
Disclosure of Invention
Based on the above problems, an object of the present invention is to provide an OCA optical adhesive and a method for manufacturing the same, wherein the OCA optical adhesive has not only good adhesion but also high yellowing resistance, and can meet the long-term use requirement of a special adhesive for cementing transparent optical elements.
In order to achieve the purpose, the invention provides an OCA optical adhesive which comprises, by weight, 50-85 parts of an acrylic resin prepolymer, 20-40 parts of an acrylic reactive diluent, 0.1-0.5 part of an antioxidant, 0.05-0.5 part of a silane coupling agent, 0.1-0.5 part of a crosslinking agent and 0.5-3 parts of a photoinitiator.
The invention adopts the acrylic resin prepolymer and the acrylic reactive diluent as the main components of the OCA optical cement, so that the compatibility of the system is better, and the adhesive force is higher. The antioxidant, the cross-linking agent and the silane coupling agent are introduced into the OCA optical adhesive, so that the OCA optical adhesive can keep the original chemical properties in various adverse environments, stably exist in various environments, and the yellowing probability of the OCA optical adhesive is greatly reduced, and the optical properties of the OCA optical adhesive reach an excellent point. The preparation raw materials adopted by the invention are simple and easy to obtain, the preparation method is easy to operate, halogen-free and environment-friendly, the obtained product has excellent performances such as optical performance, bonding performance and the like besides yellowing resistance and aging resistance, and when the product is used in a touch screen product, the signal delay time can be effectively reduced, the sensitivity of the touch screen is improved, and the product has good market application prospect.
Preferably, the acrylic resin prepolymer in the raw materials for preparation can be, but is not limited to, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts and 85 parts. The acrylic reactive diluent may be, but is not limited to, 20 parts, 23 parts, 26 parts, 30 parts, 33 parts, 35 parts, 40 parts. The antioxidant may be, but is not limited to, 0.10 parts, 0.15 parts, 0.20 parts, 0.25 parts, 0.30 parts, 0.35 parts, 0.40 parts, 0.45 parts, 0.50 parts. The silane coupling agent may be, but is not limited to, 0.05 parts, 0.10 parts, 0.15 parts, 0.20 parts, 0.25 parts, 0.30 parts, 0.35 parts, 0.40 parts, 0.45 parts, 0.50 parts. The crosslinking agent may be, but is not limited to, 0.10 parts, 0.20 parts, 0.30 parts, 0.40 parts, 0.50 parts. The photoinitiator may be, but is not limited to, 0.5 parts, 1.0 parts, 1.5 parts, 2.0 parts, 2.5 parts, 3.0 parts.
Preferably, the acrylic resin prepolymer is polymerized by acrylate reaction monomers.
Preferably, the preparation method of the acrylic resin prepolymer comprises the steps of adding an acrylate reaction monomer into a reaction kettle, adding an acrylic reactive diluent and a photoinitiator, introducing nitrogen, stirring, discharging gas, and starting an ultraviolet lamp to react to obtain the prepolymer with the viscosity of 10000-15000 MPa.s. The adhesive force can be greatly enhanced by compounding the acrylic reactive diluent on the basis of the acrylate reaction monomer. Furthermore, the stirring speed is 20-50 r/min, the power of the ultraviolet lamp is 5-10W, the wavelength is 300-400 nm, and the ultraviolet reaction is carried out for 0.1-1.0 h. The acrylic reactive diluent can be universal, and only needs to adjust viscosity to promote the reaction of acrylic reaction monomers.
Preferably, the acrylate-based reactive monomer comprises at least one of methyl acrylate, ethyl acrylate, butyl acrylate, isobutyl acrylate, n-octyl acrylate, isooctyl acrylate, and cyclohexyl acrylate.
Preferably, the acrylic reactive diluent comprises a monofunctional acrylic reactive diluent and/or a multifunctional acrylic diluent. Preferably, the acrylic reactive diluent comprises a monofunctional acrylic reactive diluent and a polyfunctional acrylic diluent, and the monofunctional acrylic and the polyfunctional acrylic are selected for compounding to accelerate curing, enhance the toughness of the OCA optical adhesive and reduce the yellowing risk.
Preferably, the monofunctional acrylic reactive diluent comprises isobornyl acrylate and/or β -hydroxyethyl methacrylate and the multifunctional acrylic diluent comprises at least one of 1, 4-butanediol dimethacrylate, neopentyl glycol diacrylate, alkoxylated trimethylolpropane triacrylate, and alkoxylated diacrylate.
Preferably, the antioxidant comprises at least one of antioxidant 1076, antioxidant 168, antioxidant 1010, antioxidant 1089, antioxidant 164 and antioxidant 3114.
Preferably, the silane coupling agent is at least one selected from the group consisting of gamma-aminopropyltriethoxysilane (KH-550), gamma-glycidoxypropyltrimethoxysilane (JH-560) and gamma- (methacryloyloxy) propyltrimethoxysilane (KH-570). The silane coupling agent can slow down the cracking and oxidation processes of molecular chains in the OCA optical adhesive and inhibit the yellowing of the molecular chains.
Preferably, the crosslinking agent includes at least one of triethylene tetramine, toluene diisocyanate, aziridine, ethoxylated trimethylolpropane triacrylate, and propoxylated glycerol triacrylate.
Preferably, the photoinitiator includes at least one of 1-hydroxycyclohexyl phenyl ketone (HCPK), 2,4, 6-trimethylbenzoyl chloride-diphenylphosphine oxide (TPO), and 2-hydroxy-2-methyl-1-phenyl-1-propanone (UV 1173).
The invention provides a preparation method of OCA optical cement, which comprises the following steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, and sieving and defoaming the mixture to obtain slurry;
(2) Coating the slurry on a first release film, and curing by an ultraviolet lamp to obtain an optical cement primary product;
(3) Covering the second release film on one side of the optical cement primary product far away from the first release film.
Preferably, the first release film and the second release film are respectively and independently a PE release film, a PET release film, an OPP release film, a PC release film, a PS release film, a PMMA release film or a BOPP release film. Preferably, the first release film and the second release film are PET release films.
Preferably, the thickness of the first release film is 75-125 μm, the peeling force is 45-90 g/f, the surface of the first release film is subjected to corona treatment, the thickness of the second release film is 25-75 μm, and the peeling force is 1-25 g/f.
Preferably, the step (1) is performed by sieving the mixture through a stainless steel mesh sieve of at least 500 meshes.
Preferably, the wavelength of the ultraviolet lamp curing in the step (2) is 300-400 nm, and the energy is 1600-3000 mJ/cm 2 The curing time of the ultraviolet lamp is 1-2 min.
Detailed Description
To better illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to specific examples. It should be noted that the following implementation of the method is a further explanation of the present invention, and should not be taken as a limitation of the present invention.
Example 1
The embodiment is an OCA optical cement, which is prepared from the following raw materials in parts by weight:
the method comprises the following steps of adding methyl acrylate, ethyl acrylate and isooctyl acrylate into a reaction kettle in a mass ratio of 1.
The method for manufacturing the OCA optical cement of the embodiment includes the steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials by a stainless steel mesh sieve of 500 meshes, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 100 μm and peeling force of 75 g/f) by knife coating with ultraviolet lamp (wavelength of 350nm and energy of 2000 mJ/cm) 2 ) Curing at 60 ℃ for 1min to obtain an optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 45 μm, and the peeling force is 15 g/f).
Example 2
The embodiment is an OCA optical adhesive, which comprises the following raw materials in parts by weight:
the method comprises the following steps of adding methyl acrylate, ethyl acrylate and isooctyl acrylate into a reaction kettle in a mass ratio of 1.
The method for manufacturing the OCA optical cement of the embodiment includes the steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials by a stainless steel mesh sieve of 500 meshes, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 100 μm and peeling force of 75 g/f) by knife coating with ultraviolet lamp (wavelength of 350nm and energy of 2000 mJ/cm) 2 ) Curing at 60 ℃ for 1min to obtain an optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 45 μm, and the peeling force is 15 g/f).
Example 3
The embodiment is an OCA optical cement, which is prepared from the following raw materials in parts by weight:
the method comprises the following steps of adding methyl acrylate, ethyl acrylate and isooctyl acrylate into a reaction kettle in a mass ratio of 1.
The method for manufacturing the OCA optical cement comprises the following steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials by a stainless steel mesh sieve of 500 meshes, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 100 μm and peeling force of 75 g/f) by knife coating with ultraviolet lamp (wavelength of 350nm and energy of 2000 mJ/cm) 2 ) Curing at 60 ℃ for 1min to obtain an optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 45 μm, and the peeling force is 15 g/f).
Example 4
The embodiment is an OCA optical cement, which is prepared from the following raw materials in parts by weight:
the method comprises the following steps of adding methyl acrylate, ethyl acrylate and isooctyl acrylate into a reaction kettle in a mass ratio of 1.
The method for manufacturing the OCA optical cement of the embodiment includes the steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials by a stainless steel mesh sieve of 500 meshes, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 100 μm and peeling force of 75 g/f) by knife coating with ultraviolet lamp (wavelength of 350nm and energy of 2000 mJ/cm) 2 ) Curing at 60 ℃ for 1min to obtain an optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 45 μm, and the peeling force is 15 g/f).
Example 5
The embodiment is an OCA optical cement, which is prepared from the following raw materials in parts by weight:
the method comprises the following steps of adding methyl acrylate, ethyl acrylate and isooctyl acrylate into a reaction kettle in a mass ratio of 1.
The method for manufacturing the OCA optical cement of the embodiment includes the steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials with a 500-mesh stainless steel screen, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 90 μm and peeling force of 90 g/f) by knife coating with ultraviolet lamp (wavelength of 300nm and energy of 3000 mJ/cm) 2 ) Curing at 50 deg.C for 2min to obtain optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 50 μm, and the peeling force is 20 g/f).
Example 6
The embodiment is an OCA optical cement, which is prepared from the following raw materials in parts by weight:
wherein, the acrylic ester performed polymer is through adding butyl acrylate, ethyl acrylate and n-octyl acrylate into reation kettle with mass ratio 1 for 1.
The method for manufacturing the OCA optical cement comprises the following steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials by a stainless steel mesh sieve of 500 meshes, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 100 μm and peeling force of 75 g/f) by knife coating with ultraviolet lamp (wavelength of 350nm and energy of 2000 mJ/cm) 2 ) Curing at 60 ℃ for 1min to obtain an optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 45 μm, and the peeling force is 15 g/f).
Example 7
The embodiment is an OCA optical adhesive, which comprises the following raw materials in parts by weight:
the method comprises the following steps of adding methyl acrylate, ethyl acrylate and isooctyl acrylate into a reaction kettle in a mass ratio of 1.
The method for manufacturing the OCA optical cement comprises the following steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials with a 500-mesh stainless steel screen, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 100 μm and peeling force of 75 g/f) by knife coating with ultraviolet lamp (wavelength of 350nm and energy of 2000 mJ/cm) 2 ) Curing at 60 ℃ for 1min to obtain an optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 45 μm, and the peeling force is 15 g/f).
Example 8
The embodiment is an OCA optical adhesive, which comprises the following raw materials in parts by weight:
the method comprises the following steps of adding methyl acrylate, ethyl acrylate and isooctyl acrylate into a reaction kettle in a mass ratio of 1.
The method for manufacturing the OCA optical cement of the embodiment includes the steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials by a stainless steel mesh sieve of 500 meshes, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 100 μm and peeling force of 75 g/f) by knife coating with ultraviolet lamp (wavelength of 350nm and energy of 2000 mJ/cm) 2 ) Curing at 60 ℃ for 1min to obtain an optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 45 μm, and the peeling force is 15 g/f).
Comparative example 1
The embodiment is an OCA optical cement, which is prepared from the following raw materials in parts by weight:
the method comprises the following steps of adding methyl acrylate, ethyl acrylate and isooctyl acrylate into a reaction kettle in a mass ratio of 1.
The method for manufacturing the OCA optical cement of the embodiment includes the steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials by a stainless steel mesh sieve of 500 meshes, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 100 μm and peeling force of 75 g/f) by knife coating with ultraviolet lamp (wavelength of 350nm and energy of 2000 mJ/cm) 2 ) Curing at 60 ℃ for 1min to obtain an optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 45 μm, and the peeling force is 15 g/f).
Comparative example 2
The embodiment is an OCA optical cement, which is prepared from the following raw materials in parts by weight:
wherein, the acrylic ester performed polymer is through adding methyl acrylate, ethyl acrylate and isooctyl acrylate into reation kettle with mass ratio 1 for 2.
The method for manufacturing the OCA optical cement comprises the following steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials by a stainless steel mesh sieve of 500 meshes, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 100 μm and peeling force of 75 g/f) by knife coating with ultraviolet lamp (wavelength of 350nm and energy of 2000 mJ/cm) 2 ) Curing at 60 ℃ for 1min to obtain an optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 45 μm, and the peeling force is 15 g/f).
Comparative example 3
The embodiment is an OCA optical cement, which is prepared from the following raw materials in parts by weight:
the method comprises the following steps of adding methyl acrylate, ethyl acrylate and isooctyl acrylate into a reaction kettle in a mass ratio of 1.
The method for manufacturing the OCA optical cement of the embodiment includes the steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials by a stainless steel mesh sieve of 500 meshes, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 100 μm and peeling force of 75 g/f) by knife coating with ultraviolet lamp (wavelength of 350nm and energy of 2000 mJ/cm) 2 ) Curing at 60 ℃ for 1min to obtain an optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 45 μm, and the peeling force is 15 g/f).
Comparative example 4
The embodiment is an OCA optical cement, which is prepared from the following raw materials in parts by weight:
the method comprises the following steps of adding methyl acrylate, ethyl acrylate and isooctyl acrylate into a reaction kettle in a mass ratio of 1.
The method for manufacturing the OCA optical cement comprises the following steps:
(1) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, sieving the dispersed raw materials by a stainless steel mesh sieve of 500 meshes, and defoaming the dispersed raw materials to obtain slurry;
(2) Coating the slurry on a first release film (PET release film with thickness of 100 μm and peeling force of 75 g/f) by knife coating with ultraviolet lamp (wavelength of 350nm and energy of 2000 mJ/cm) 2 ) Curing at 60 ℃ for 1min to obtain an optical cement primary product;
(3) Covering the side of the optical adhesive primary product far away from the first release film with a second release film (the thickness is 45 μm, and the peeling force is 15 g/f).
The results of testing the yellowing value of the OCA optical adhesives prepared in examples 1 to 8 and comparative examples 1 to 4 after aging in an environment of 150 ℃ and the adhesion after removing the second release film are shown in table 1.
TABLE 1 yellow discoloration value and adhesion test results for the examples
The results in table 1 show that the OCA optical adhesive prepared by using the acrylic resin prepolymer and the acrylic reactive diluent as main raw materials and adding the antioxidant, the silane coupling agent and the crosslinking agent has high adhesion and a low yellowing value.
As can be seen from comparison between example 1 and examples 7-8, the OCA optical adhesive prepared by compounding the monofunctional group acrylic acid and the polyfunctional group acrylic acid as the reactive diluent has a lower yellowing value.
As can be seen from comparative examples 1 to 4, when the antioxidant content is controlled to be 0.1 to 0.2 parts, the yellowing value is low, and mainly because a small amount of antioxidant is added, the color difference value caused by ultraviolet and infrared light irradiation can be effectively reduced, so that the yellowing resistance and the aging resistance of the OCA optical adhesive can be improved.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it is not limited to the embodiments, and those skilled in the art should understand that the technical solutions of the present invention can be modified or substituted with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The OCA optical adhesive is characterized in that the preparation raw materials comprise, by weight, 50-85 parts of acrylic resin prepolymer, 20-40 parts of acrylic reactive diluent, 0.10-0.50 part of antioxidant, 0.05-0.50 part of silane coupling agent, 0.1-0.5 part of crosslinking agent and 0.5-3.0 parts of photoinitiator.
2. The OCA optical cement of claim 1, wherein the acrylic resin pre-polymer is polymerized by acrylate reaction monomers.
3. The OCA optical cement of claim 1, wherein the acrylic resin prepolymer is prepared by adding an acrylate reaction monomer into a reaction kettle, adding an acrylic reactive diluent and a photoinitiator, introducing nitrogen gas, stirring, discharging gas, and starting an ultraviolet lamp to react to obtain a prepolymer with a viscosity of 10000-15000 MPa-s.
4. The OCA optical adhesive of claim 2 or 3, wherein the acrylate-based reactive monomer comprises at least one of methyl acrylate, ethyl acrylate, butyl acrylate, isobutyl acrylate, n-octyl acrylate, isooctyl acrylate, and cyclohexyl acrylate.
5. The OCA optical glue of claim 1, wherein the acrylic reactive diluent comprises a monofunctional acrylic reactive diluent and/or a multifunctional acrylic diluent.
6. The OCA optical adhesive of claim 5, wherein the monofunctional acrylic reactive diluent comprises isobornyl acrylate and/or β -hydroxyethyl methacrylate and the multifunctional acrylic diluent comprises at least one of 1, 4-butanediol dimethacrylate, neopentyl glycol diacrylate, alkoxylated trimethylolpropane triacrylate, and alkoxylated diacrylate.
7. The OCA optical glue of claim 1, comprising at least one of features (1) to (4):
(1) The antioxidant comprises at least one of antioxidant 1076, antioxidant 168, antioxidant 1010, antioxidant 1089, antioxidant 164 and antioxidant 3114;
(2) The silane coupling agent is at least one of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane and gamma- (methacryloyloxy) propyltrimethoxysilane;
(3) The cross-linking agent comprises at least one of triethylene tetramine, toluene diisocyanate, aziridine, ethoxylated trimethylolpropane triacrylate and propoxylated glycerol triacrylate;
(4) The photoinitiator includes at least one of 1-hydroxycyclohexyl phenyl ketone, 2,4, 6-trimethylbenzoyl chloride-diphenylphosphine oxide, and 2-hydroxy-2-methyl-1-phenyl-1-propanone.
8. The method for manufacturing an OCA optical cement according to any one of claims 1-7, comprising the steps of:
(I) Weighing the raw materials in parts by weight, mixing and stirring the raw materials to disperse the raw materials, and sieving and defoaming the mixture to obtain slurry;
(II) coating the slurry on a first release film, and curing by an ultraviolet lamp to obtain an optical adhesive primary product;
(III) covering a second release film on one side of the optical adhesive primary product far away from the first release film.
9. The method of claim 8, wherein the first release film and the second release film are each independently a PE release film, a PET release film, an OPP release film, a PC release film, a PS release film, a PMMA release film, or a BOPP release film.
10. The method for manufacturing an OCA optical cement as claimed in claim 8, wherein the first release film has a thickness of 75-125 μm and a peeling force of 45-90 g/f, the surface of the first release film is corona-treated, the second release film has a thickness of 25-75 μm and a peeling force of 1-25 g/f.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116875228A (en) * | 2023-07-31 | 2023-10-13 | 派乐玛光学薄膜(东莞)有限公司 | Environment-friendly ultraviolet-resistant OCA optical cement and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116875228A (en) * | 2023-07-31 | 2023-10-13 | 派乐玛光学薄膜(东莞)有限公司 | Environment-friendly ultraviolet-resistant OCA optical cement and preparation method thereof |
| CN116875228B (en) * | 2023-07-31 | 2024-05-03 | 广东派乐玛新材料技术有限公司 | Environment-friendly ultraviolet-resistant OCA optical cement and preparation method thereof |
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