CN114561164A - Post-curable optical transparent adhesive tape and preparation method thereof - Google Patents
Post-curable optical transparent adhesive tape and preparation method thereof Download PDFInfo
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- CN114561164A CN114561164A CN202210017346.7A CN202210017346A CN114561164A CN 114561164 A CN114561164 A CN 114561164A CN 202210017346 A CN202210017346 A CN 202210017346A CN 114561164 A CN114561164 A CN 114561164A
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- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1812—C12-(meth)acrylate, e.g. lauryl (meth)acrylate
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- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/24—Homopolymers or copolymers of amides or imides
-
- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/24—Homopolymers or copolymers of amides or imides
- C09J133/26—Homopolymers or copolymers of acrylamide or methacrylamide
-
- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/10—Adhesives in the form of films or foils without carriers
-
- 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
- C09J2433/00—Presence of (meth)acrylic polymer
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a post-curable optical transparent adhesive tape, which comprises a light release film, a curable optical transparent adhesive layer and a heavy release film, wherein the light release film and the heavy release film are respectively attached to two sides of the curable optical transparent adhesive layer, and the curable optical transparent adhesive layer is obtained by coating and drying a post-curable (methyl) acrylate polymer. According to the invention, the (methyl) acrylate functional monomer which can be used for post-curing is added into the (methyl) acrylate main monomer and the (methyl) acrylate functional monomer, and different photoinitiators are selected to react with the corresponding (methyl) acrylate functional monomer, so that the filling property and reliability are improved, the filling property can reach 50-70% under the condition of keeping the same thickness, and the filling property is far more than that of the currently mainstream fully-bonded OCA and is 20-40%.
Description
Technical Field
The invention belongs to the field of optical adhesive tapes, and particularly relates to a post-curable optical transparent adhesive tape.
Background
The optical transparent adhesive tape (OCA) is an adhesive used for producing a display screen, and the OCA not only can reduce the reflection among layers due to the refractive index matched with the cover plate, but also can increase the contrast and the brightness of the display; and also as a structural support with impact resistance. At present, the mobile phone market has higher requirements on screen occupation ratio, perforated screens are popular, and the design is characterized in that circular holes with the diameter of about 4mm and the height of 60-80 μm are arranged on a polarizer in a display module, so that the OCA is required to have 50% -70% of filling property on the premise of keeping the current thickness. At present, the filling performance of the mainstream fully-laminated OCA is 20% -40%, faults generated by the round hole cannot be well filled, and a post-curable OCA with high filling performance and cohesion is developed for the problem.
Disclosure of Invention
The invention aims to provide a post-curable optical scotch tape, which improves the filling property and reliability, can achieve 50-70% of filling property under the condition of keeping the same thickness, and is far more than the current mainstream attaching OCA with the filling property of 20-40%.
In order to achieve the purpose, the invention adopts the technical scheme that: the post-curable optical transparent adhesive tape comprises a light release film, a curable optical transparent adhesive layer and a heavy release film, wherein the light release film and the heavy release film are respectively attached to two sides of the curable optical transparent adhesive layer, and the curable optical transparent adhesive layer is obtained by coating and drying a post-curable (methyl) acrylate polymer.
The technical scheme of further improvement in the technical scheme is as follows:
1. in the above scheme, the raw materials for preparing the post-curable (meth) acrylate polymer comprise the following components in percentage by weight:
75-90 parts of (methyl) acrylic acid alkyl ester main monomer, 10-25 parts of (methyl) acrylic acid ester functional monomer, 0.01-1 part of (methyl) acrylic acid ester functional monomer capable of being used as post-curing and 0.05-1 part of photoinitiator.
2. In the above scheme, the alkyl (meth) acrylate main monomer may be any one or more of isooctyl (meth) acrylate, n-hexyl (meth) acrylate, n-butyl (meth) acrylate, lauryl (meth) acrylate, and dihexyl (meth) acrylate.
3. In the above scheme, the (meth) acrylate functional monomer may be: any one or more of hydroxyethyl (meth) acrylate, hydroxybutyl (meth) acrylate, hydroxypropyl (meth) acrylate, (meth) acrylamide, (meth) acryloylmorpholine, isobornyl (meth) acrylate.
4. In the above scheme, the (meth) acrylate functional monomer that can be used for post-curing is any one of ethyl (meth) acrylate isocyanate or glycidyl (meth) acrylate.
5. In the above scheme, the photoinitiator may be a radical initiator: dimethyl bismethyl ether, dialkoxyacetophenone, methyl benzoylformate, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-methyl-1- (4-methylthiophenyl) -2-morpholine-1-propanone, any one or more of 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinebenzylphenyl) butanone, 2,4, 6-trimethylbenzoylphenylphosphine, 2,4, 6-trimethylbenzoyldiphenylphosphine oxide, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate, benzophenone, 4' -bis (diethylamino) benzophenone, may also be a cationic initiator: any one or more of diazonium salt, diaryl iodonium salt, triaryl sulfonium salt, alkyl sulfonium salt, iron arene salt, sulfonyloxy ketone and triaryl siloxy ether.
6. In the above-mentioned embodiment, when the ethyl (meth) acrylate isocyanate is used as the (meth) acrylate functional monomer that can be used for post-curing, a radical photoinitiator is used, and when the glycidyl (meth) acrylate is used as the (meth) acrylate functional monomer that can be used for post-curing, a cationic photoinitiator is used.
The invention adopts another technical scheme that: a preparation method of a post-curable optical transparent adhesive tape comprises the steps of coating a post-curable (methyl) acrylate polymer on a heavy release film, baking for 2-5min at the temperature of 80-110 ℃, and then attaching a light release film to prepare the post-curable optical transparent adhesive tape.
The technical scheme of further improvement in the technical scheme is as follows:
1. in the above embodiment, when the (meth) acrylate functional monomer that can be used for post-curing is ethyl (meth) acrylate isocyanate, the method includes the following steps:
s1, reacting under the protection of nitrogen with a reflux device, a thermometer and a stirring device, adding alkyl (meth) acrylate main monomer, (meth) acrylate functional monomer and a solvent into a flask, stirring and dissolving uniformly, heating to 60 ℃, adding a thermal initiator, reacting for 8-10 hours, and then cooling to obtain a (meth) acrylate polymer;
s2, adding the (methyl) acrylic ester isocyanate and the catalyst into the flask, heating to 40 ℃, stirring for 4h, adding the photoinitiator, and uniformly stirring again to obtain the (methyl) acrylic ester polymer capable of being post-cured.
2. In the above embodiment, when the (meth) acrylate functional monomer that can be used for post-curing is glycidyl (meth) acrylate, the method includes the following steps:
s1', reacting under the protection of nitrogen with a reflux device, a thermometer and a stirring device, adding alkyl (meth) acrylate main monomer, functional (meth) acrylate monomer, glycidyl methacrylate and a solvent into a flask, stirring and dissolving uniformly, heating to 60 ℃, adding a thermal initiator, reacting, cooling to obtain a (meth) acrylate polymer,
s2', and adding a photoinitiator to obtain the (methyl) acrylic ester polymer capable of being post-cured.
3. In the above-mentioned embodiment, the weight-average molecular weight of the (meth) acrylate polymer is 10 to 80 ten thousand, and the further weight-average molecular weight is 20 to 40 ten thousand.
4. In the scheme, the solvent is a mixture of ethyl acetate and butanone; the thermal initiator is azodiisoheptanitrile, and the weight part of the thermal initiator is 0.0.5-0.2; the catalyst is dibutyltin dilaurate.
5. In the scheme, the storage modulus of the curable optical transparent adhesive layer at 25 ℃ is 40 x 103～100*103Pa。
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the post-curable optical transparent adhesive tape, the (methyl) acrylate functional monomer which can be used for post-curing is added into the (methyl) acrylate main monomer and the (methyl) acrylate functional monomer, and different photoinitiators are selected to react with the corresponding (methyl) acrylate functional monomer, so that the filling property is improved, 50% -70% of the filling property can be achieved under the condition of keeping the same thickness, the filling property is far more than that of the existing mainstream full-lamination OCA with the filling property of 20% -40%, the filling problem of the height difference of a perforated screen is solved, and the reliability of the perforated screen is ensured after UV post-curing.
2. According to the preparation method of the post-curable optical transparent adhesive tape, different preparation processes are adjusted according to different (methyl) acrylate functional monomers, so that the prepared optical transparent adhesive tape is stable in adhesive force and excellent in filling property, has relatively high molecular weight and storage modulus while ensuring the filling property, can have relatively strong cohesive force, and does not overflow glue in the processes of die cutting, transportation and storage.
Detailed Description
The invention is further described below with reference to the following examples:
examples 1 to 6: the post-curable optical transparent adhesive tape comprises a light release film, a curable optical transparent adhesive layer and a heavy release film, wherein the light release film and the heavy release film are respectively attached to two sides of the curable optical transparent adhesive layer, the curable optical transparent adhesive layer is obtained by coating and drying a post-curable (meth) acrylate polymer, and the post-curable (meth) acrylate polymer is prepared from the following raw materials in percentage by weight, as shown in table 1:
TABLE 1
The post-curable optical transparent adhesive tape in the embodiment of the invention is prepared by coating a post-curable (meth) acrylate polymer on a heavy release film, baking the heavy release film at 80-110 ℃ for 2-5min, and then attaching a light release film to the heavy release film to obtain the post-curable optical transparent adhesive tape.
Specifically, the method for preparing the post-curable optical clear adhesive tape of examples 1, 3 and 4, when the (meth) acrylate functional monomer used for post-curing is ethyl (meth) acrylate isocyanate, comprises the following steps:
s1, reacting under the protection of nitrogen with a reflux device, a thermometer and a stirring device, adding a, b and a solvent into a flask, stirring and dissolving uniformly, heating to 60 ℃, adding a thermal initiator, reacting for 9 hours, and then cooling to obtain a (methyl) acrylate polymer;
and S2, adding the c (methyl) ethyl acrylate isocyanate and the catalyst into a flask, heating to 40 ℃, stirring for 4 hours, adding the photoinitiator, and uniformly stirring again to obtain the (methyl) acrylate polymer capable of being post-cured.
Examples 2, 5, and 6 a method for preparing a post-curable optical clear adhesive tape, when the (meth) acrylate functional monomer used for post-curing is glycidyl (meth) acrylate, comprising the steps of:
s1', reacting under the protection of nitrogen with a reflux device, a thermometer and a stirring device, adding a, b and c (glycidyl methacrylate) and a solvent into a flask, stirring and dissolving uniformly, heating to 60 ℃, adding a thermal initiator, cooling after reaction to obtain a (methyl) acrylate polymer,
s2', and adding a photoinitiator to obtain the (methyl) acrylic ester polymer capable of being post-cured.
Comparative examples 1 to 2: the utility model provides an optical transparent adhesive tape, is including lightly from type membrane, optical transparent adhesive tape layer and heavily from type membrane, lightly from type membrane and heavily from type membrane laminating respectively in optical transparent adhesive tape layer both sides, optical transparent adhesive tape layer's preparation raw materials includes the following component according to weight percent, as shown in Table 2:
TABLE 2
| Components | Comparative example 1 | Comparative example 2 |
| Isooctyl (meth) acrylate | 83 | 60 |
| N-hexyl (meth) acrylate | / | 10 |
| Lauryl (meth) acrylate | / | / |
| Hydroxyethyl (meth) acrylate | 5 | 20 |
| (meth) acrylamide | / | 10 |
| (meth) acryloylmorpholine | / | / |
| Glycidyl (meth) methacrylate | / | 0.3 |
| (meth) acrylic acid ethyl ester isocyanate | / | / |
| Dialkoxyacetophenones | / | / |
| 1-hydroxycyclohexyl phenyl methanones | 0.5 | / |
| Diazonium salts | / | 0.5 |
| Diaryl iodonium salt | / | / |
| Butanone | 110 | 60 |
| Ethyl acetate | 50 | |
| Azo diisoheptonitrile | 0.1 | 0.1 |
Comparative example preparation methods preparation procedures commonly used in the art were employed.
The properties of the optical transparent adhesive tapes obtained in examples 1 to 6 and comparative examples 1 to 2 are shown in Table 3:
TABLE 3
Test method
1) And (3) testing adhesive force: a150 μm thick sample was cut into a width of 25mm, the light film was removed and attached to glass, PET 25 μm thick and 300mm long and subjected to corona treatment was attached to the other side, the end of each strip was clamped to a tensile jig of a tensile machine (Aiander tensile machine), peeled off at a speed of 300mm/min, and 5 sets of data were measured to find an average value.
2) Modulus test: the test was carried out by placing a disk of 8mm diameter in a DHR-2 rheometer (TA instruments USA) with reference to ASTM D4440-15.
3) And (3) filling property test: punching a round hole with the aperture of 4mm on the edge of a polaroid (coated with an adhesive film with the thickness of 5 microns) with the thickness of 80 microns, attaching the round hole to glass with the thickness of 8mm, simultaneously attaching the OCA with the thickness of 150 microns to another glass with the thickness of 8mm, vacuum attaching the OCA and the glass, placing the OCA and the glass into a high-pressure defoaming machine for high-pressure defoaming, carrying out UV curing on a sample after defoaming, and finally, judging whether bubbles exist in a punching position or not. (1, vacuum bonding conditions: 1000pa, 45 ℃, 30 s; 2, high-pressure defoaming conditions: 50 ℃, 5 kg; 3, UV curing conditions: 2-200mw/cm2，＞3000mj/cm2)。
4) And (3) reliability testing: and (3) placing the attached UV-cured sample in a double 85 high-temperature high-humidity box for 500h, and observing whether newly-added bubbles are generated at the punching position.
As shown in the evaluation results of Table 3, the optical transparent adhesive tape of the example has excellent performance, stable adhesion, excellent filling property and reliability, can meet the impact resistance of the adhesive tape in structural support, and simultaneously can meet the filling of various faults in a display screen through excellent filling, while the adhesive force of the comparative example 1 is lower, the viscosity is poor, the adhesive is easy to fall off in the using process, and the filling property and the reliability of the comparative example 2 are poor, so that the fault filling between structural members in the using process cannot be ensured; therefore, the invention improves the filling property and reliability, can reach 50-70% of filling property under the condition of keeping the same thickness, is far more than the totally-laminated OCA with the filling property of 20-40% of the current mainstream, can meet the die cutting process while ensuring the filling property, and can not overflow glue in the die cutting, transportation and storage processes.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A post-curable optical clear adhesive tape characterized by: the curable optical transparent adhesive layer is prepared by coating and drying a (methyl) acrylate polymer which can be post-cured.
2. The post-curable optical clear adhesive tape according to claim 1, characterized in that: the preparation raw materials of the post-curable (methyl) acrylate polymer comprise the following components in parts by weight:
75-90 parts of (methyl) acrylic acid alkyl ester main monomer, 10-25 parts of (methyl) acrylic acid ester functional monomer, 0.01-1 part of (methyl) acrylic acid ester functional monomer capable of being used as post-curing and 0.05-1 part of photoinitiator.
3. The post-curable optical clear adhesive tape according to claim 1, characterized in that: the main monomer of the alkyl (meth) acrylate is any one or more of isooctyl (meth) acrylate, n-hexyl (meth) acrylate, n-butyl (meth) acrylate, lauryl (meth) acrylate and dihexyl (meth) acrylate;
the (methyl) acrylate functional monomer is as follows: any one or more of hydroxyethyl (meth) acrylate, hydroxybutyl (meth) acrylate, hydroxypropyl (meth) acrylate, (meth) acrylamide, (meth) acryloylmorpholine, isobornyl (meth) acrylate;
the (meth) acrylate functional monomer capable of being used for post-curing is any one of ethyl (meth) acrylate isocyanate or glycidyl (meth) acrylate;
the photoinitiator is a free radical initiator: dimethyl bismethyl ether, dialkoxyacetophenone, methyl benzoylformate, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-methyl-1- (4-methylthiophenyl) -2-morpholine-1-propanone, 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinebenzylphenyl) butanone, 2,4, 6-trimethylbenzoylphenylphosphine, 2,4, 6-trimethylbenzoyldiphenylphosphine oxide, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate, benzophenone, 4' -bis (diethylamino) benzophenone, or as a cationic initiator: any one or more of diazonium salt, diaryl iodonium salt, triaryl sulfonium salt, alkyl sulfonium salt, iron arene salt, sulfonyloxy ketone and triaryl siloxy ether.
4. The post-curable optical clear adhesive tape according to claim 1, characterized in that: when ethyl (meth) acrylate isocyanate is used as the (meth) acrylate functional monomer that can be used for post-curing, a radical photoinitiator is used, and when glycidyl (meth) acrylate is used as the (meth) acrylate functional monomer that can be used for post-curing, a cationic photoinitiator is used.
5. A method for preparing the post-curable optical clear adhesive tape according to any one of claims 1 to 4, wherein the method comprises the following steps: coating the (methyl) acrylate polymer capable of being post-cured on the heavy release film, baking for 2-5min at the temperature of 80-110 ℃, and then attaching the light release film to prepare the optical transparent adhesive tape capable of being post-cured.
6. The method of claim 5, wherein the step of preparing the post-curable optical scotch tape comprises: when the (meth) acrylate functional monomer capable of being used for post-curing is ethyl (meth) acrylate isocyanate, the method comprises the following steps:
s1, reacting under the protection of nitrogen with a reflux device, a thermometer and a stirring device, adding alkyl (meth) acrylate main monomer, (meth) acrylate functional monomer and a solvent into a flask, stirring and dissolving uniformly, heating to 60 ℃, adding a thermal initiator, reacting for 8-10 hours, and then cooling to obtain a (meth) acrylate polymer;
s2, adding the (methyl) acrylic ester isocyanate and the catalyst into the flask, heating to 40 ℃, stirring for 4h, adding the photoinitiator, and uniformly stirring again to obtain the (methyl) acrylic ester polymer capable of being post-cured.
7. The method of claim 5, wherein the step of preparing the post-curable optical scotch tape comprises: when the (meth) acrylate functional monomer capable of being used for post-curing is glycidyl (meth) acrylate, the method comprises the following steps:
s1', reacting under the protection of nitrogen with a reflux device, a thermometer and a stirring device, adding alkyl (meth) acrylate main monomer, functional (meth) acrylate monomer, glycidyl methacrylate and a solvent into a flask, stirring and dissolving uniformly, heating to 60 ℃, adding a thermal initiator, reacting, and cooling to obtain a (meth) acrylate polymer;
s2', and adding a photoinitiator to obtain the (methyl) acrylic ester polymer capable of being post-cured.
8. A process for the preparation of a post-curable optical clear adhesive tape according to claim 6 or 7, characterized in that: the weight average molecular weight of the (meth) acrylate polymer is 10 to 80 ten thousand, and the further weight average molecular weight is 20 to 40 ten thousand.
9. The process for preparing post-curable optical scotch tape according to any one of claims 6 or 7, characterized in that: the solvent is a mixture of ethyl acetate and butanone; the thermal initiator is azodiisoheptanitrile, and the weight part of the thermal initiator is 0.0.5-0.2 part; the catalyst is dibutyltin dilaurate.
10. A process for preparing a post-curable optical clear adhesive tape according to claim 5, wherein: the curable optical transparent adhesive layer has a storage modulus of 40 x 10 at 25 DEG C3～100*103Pa。
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