CN116987448A - Preparation process of OCA optical adhesive - Google Patents
Preparation process of OCA optical adhesive Download PDFInfo
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- CN116987448A CN116987448A CN202211554452.5A CN202211554452A CN116987448A CN 116987448 A CN116987448 A CN 116987448A CN 202211554452 A CN202211554452 A CN 202211554452A CN 116987448 A CN116987448 A CN 116987448A
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- optical adhesive
- oca optical
- mixture
- tackifying resin
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- 239000000853 adhesive Substances 0.000 title claims abstract description 37
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 37
- 230000003287 optical effect Effects 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000000203 mixture Substances 0.000 claims abstract description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000003999 initiator Substances 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 15
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 claims abstract description 11
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims abstract description 11
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 11
- -1 acrylic ester Chemical class 0.000 claims abstract description 11
- 239000003292 glue Substances 0.000 claims abstract description 11
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000000178 monomer Substances 0.000 claims abstract description 8
- RBQRWNWVPQDTJJ-UHFFFAOYSA-N methacryloyloxyethyl isocyanate Chemical compound CC(=C)C(=O)OCCN=C=O RBQRWNWVPQDTJJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims abstract description 6
- NQSLZEHVGKWKAY-UHFFFAOYSA-N 6-methylheptyl 2-methylprop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C(C)=C NQSLZEHVGKWKAY-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 6
- LHGVFZTZFXWLCP-UHFFFAOYSA-N guaiacol Chemical compound COC1=CC=CC=C1O LHGVFZTZFXWLCP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000000016 photochemical curing Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 239000002904 solvent Substances 0.000 claims abstract description 3
- 230000035484 reaction time Effects 0.000 claims description 10
- 125000001931 aliphatic group Chemical group 0.000 claims description 4
- 229920000768 polyamine Polymers 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 3
- 229960001124 trientine Drugs 0.000 claims description 3
- 238000001723 curing Methods 0.000 claims description 2
- 150000003505 terpenes Chemical class 0.000 claims description 2
- 235000007586 terpenes Nutrition 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 5
- 239000002390 adhesive tape Substances 0.000 abstract description 3
- 239000012790 adhesive layer Substances 0.000 abstract 1
- 201000007909 oculocutaneous albinism Diseases 0.000 description 25
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000006059 cover glass Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000013035 low temperature curing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
-
- 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
- C08F220/1808—C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
-
- 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
- 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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
Landscapes
- 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 high-modulus OCA optical adhesive tape, which comprises the following steps: taking 2-ethylhexyl acrylate, hydroxyethyl acrylate, isobornyl acrylate, acrylamide, isooctyl methacrylate and ethyl acetate, sequentially pouring the monomers and the solvent into a container, uniformly stirring, introducing nitrogen, heating to 64-66 ℃, and adding an initiator azodiisobutyronitrile to form a mixture; adding a proper amount of ethyl acetate to dilute the acrylic ester glue to a proper viscosity, cooling to a temperature below 48-52 ℃, adding hydroxyanisole and isocyanoethyl methacrylate, and turning off nitrogen stirring; and adding a proper amount of thermosetting agent, photoinitiator, photo-curing agent and tackifying resin, and fully stirring to obtain the OCA optical adhesive. The high-modulus OCA optical adhesive tape provided by the invention has the advantages that the optical adhesive layer has high modulus and high gel rate, the phenomenon of uneven adhesive surface can be prevented when electronic mobile equipment is filled, the appearance is improved, the yield is improved, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of optical adhesives, in particular to a preparation process of an OCA optical adhesive.
Background
The explosive increase of the demand of the global smart phones and wearable electronic products provides wide market space for OCA optical cement and has more severe requirements on appearance and adhesive characteristics. The OCA may be filled between the external touch cover glass of the electronic display and the underlying display module, providing mechanical adhesion. In a display device, OCA must be well uniformly filled in the decorative black ink steps around the cover glass and prevented from overflowing, and OCA adhesives are required to have proper adhesive fluidity and good thickness control. OCAs for mobile devices also require a modulus to provide structural support to prevent appearance irregularities and imaging problems due to deformation under external stress trauma encountered during abnormal operation. Therefore, it is very necessary and challenging to develop an OCA optical adhesive having high light transmittance, low haze, high modulus, and good adhesion. At present, when the existing OCA optical adhesive is attached, interface unevenness easily occurs between a glass cover plate and the OCA adhesive, and the defects of influence on user experience and the like are overcome.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation process of an OCA optical adhesive, which is used for obtaining the high-viscosity OCA optical adhesive with high modulus and high gel rate, preventing the phenomenon of uneven adhesive surface when filling electronic mobile equipment, improving the appearance, increasing the yield and reducing the production cost.
In order to achieve the above purpose, the invention adopts the following technical scheme: a preparation process of an OCA optical adhesive comprises the following steps:
firstly, taking 120-130 parts of 2-ethylhexyl acrylate, 9-12 parts of hydroxyethyl acrylate, 60-65 parts of isobornyl acrylate, 6-8 parts of acrylamide, 6-8 parts of isooctyl methacrylate and 280-320 parts of ethyl acetate, sequentially pouring the monomers and the solvent into a container, uniformly stirring, introducing nitrogen, heating to 64-66 ℃, and adding 0.32-0.38 part of azo diisobutyronitrile serving as an initiator to form a mixture;
step two, weighing 70-80 parts of 2-ethylhexyl acrylate, 12-15 parts of hydroxyethyl acrylate, 40-45 parts of isobornyl acrylate, 3.8-4.2 parts of acrylamide and 55-65 parts of ethyl acetate to prepare a dropwise adding mixture;
thirdly, raising the reaction temperature of the mixture to 72-74 ℃, dropwise adding the mixture and 0.42-0.48 part of initiator, continuously reacting, raising the temperature to 77-81 ℃, adding 0.38-0.42 part of initiator, and continuously reacting to fully react monomers to obtain the acrylic ester glue;
fourth, adding a proper amount of ethyl acetate to dilute the acrylic ester glue to a proper viscosity, cooling to a temperature below 48-52 ℃, adding 0.32-0.38 part of hydroxyanisole (MEHQ) and 0.32-0.38 part of isocyano ethyl methacrylate, and closing nitrogen to stir for 6-8 hours to ensure certain grafting efficiency;
and fifthly, adding a proper amount of thermosetting agent, photoinitiator, photo-curing agent and tackifying resin, and fully stirring to obtain the OCA optical adhesive.
The technical scheme further improved in the technical scheme is as follows:
1. in the scheme, the tackifying resin is C5 series tackifying resin, C9 series tackifying resin or terpene tackifying resin.
2. In the above scheme, the low temperature curing in the step six is carried out for 3 days.
3. In the above scheme, the thermosetting agent is aliphatic polyamine or triethylene tetramine.
4. In the scheme, the dripping time of the dripping mixture in the third step is 1h, the reaction time at 72-74 ℃ in the third step is 2h, and the reaction time at 77-81 ℃ in the third step is 2h.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the high-viscosity OCA optical adhesive is added with the 2-ethylhexyl acrylate and the isocyanoethyl methacrylate, and adopts secondary curing to ensure that the adhesive has high modulus and high gel rate, so that the phenomenon of uneven adhesive surface can be prevented when electronic mobile equipment is filled, the appearance is improved, the yield is improved, and the production cost is reduced.
Description of the embodiments
The present patent will be further understood by the specific examples given below, which are not intended to be limiting.
The invention is further described below with reference to examples:
example 1: a preparation process of an OCA optical adhesive comprises the following steps:
step one, 125 parts of 2-ethylhexyl acrylate, 10 parts of hydroxyethyl acrylate, 62 parts of isobornyl acrylate, 7 parts of acrylamide, 7 parts of isooctyl methacrylate and 290 parts of ethyl acetate are sequentially poured into a container to be uniformly stirred, nitrogen is introduced for 30min, the temperature is raised to 65 ℃, and 0.35 part of azo-diisobutyronitrile serving as an initiator is added to form a mixture; the reaction is carried out for 2 hours, which is favorable for increasing the molecular weight of the polymer and increasing the cohesion and viscosity;
step two, weighing 72 parts of 2-ethylhexyl acrylate, 14 parts of hydroxyethyl acrylate, 42 parts of isobornyl acrylate, 4 parts of acrylamide and 58 parts of ethyl acetate to prepare a dropwise adding mixture;
step three, raising the reaction temperature of the mixture to 73 ℃, dropwise adding the mixture and 0.45 part of initiator, continuing to react, raising the temperature to 80 ℃, adding 0.4 part of initiator, and continuing to react to fully react the monomers to obtain the acrylic ester glue;
step four, adding a proper amount of ethyl acetate to dilute the acrylic ester glue to a proper viscosity, cooling to below 50 ℃, adding 0.36 part of hydroxyanisole MEHQ and 0.35 part of isocyano ethyl methacrylate, and closing nitrogen and stirring for 5 hours;
and fifthly, adding a proper amount of thermosetting agent, photoinitiator, photo-curing agent and tackifying resin, and fully stirring to obtain the OCA optical adhesive.
The tackifying resin is C5 series tackifying resin, the sixth step is cured for 3 days at low temperature, the thermosetting agent is aliphatic polyamine, the dripping time of the dripping mixture in the third step is 1h, the reaction time at 73 ℃ in the third step is 2h, and the reaction time at 78 ℃ in the third step is 2h.
Example 2: a high-tack OCA optical adhesive obtained by:
step one, 128 parts of 2-ethylhexyl acrylate, 11 parts of hydroxyethyl acrylate, 64 parts of isobornyl acrylate, 6 parts of acrylamide, 7 parts of isooctyl methacrylate and 290 parts of ethyl acetate are sequentially poured into a container to be uniformly stirred, nitrogen is introduced for 30min, the temperature is raised to 65 ℃, and 0.38 part of azo-diisobutyronitrile serving as an initiator is added to form a mixture; the reaction is carried out for 2 hours, which is favorable for increasing the molecular weight of the polymer and increasing the cohesion and viscosity;
step two, 78 parts of acrylic acid-2-ethylhexyl ester, 14 parts of hydroxyethyl acrylate, 42 parts of isobornyl acrylate, 4 parts of acrylamide and 60 parts of ethyl acetate are weighed to prepare a dropwise added mixture;
step three, raising the reaction temperature of the mixture to 72 ℃, dropwise adding the mixture and 0.45 part of initiator, continuing to react, raising the temperature to 78 ℃, adding 0.4 part of initiator, and continuing to react to fully react the monomers to obtain the acrylic ester glue;
step four, adding a proper amount of ethyl acetate to dilute the acrylic ester glue to a proper viscosity, cooling to below 50 ℃, adding 0.35 part of hydroxyanisole MEHQ and 0.35 part of isocyano ethyl methacrylate, and closing nitrogen and stirring for 5 hours;
and fifthly, adding a proper amount of thermosetting agent, photoinitiator, photo-curing agent and tackifying resin, and fully stirring to obtain the OCA optical adhesive.
The tackifying resin is C9 series tackifying resin, the sixth step is carried out for 3 days at low temperature, the thermosetting agent is triethylene tetramine, the dripping time of the dripping mixture in the third step is 1h, the reaction time at 73 ℃ in the third step is 2h, and the reaction time at 78 ℃ in the third step is 2h.
Example 3: a high-tack OCA optical adhesive obtained by:
step one, 125 parts of 2-ethylhexyl acrylate, 10 parts of hydroxyethyl acrylate, 62 parts of isobornyl acrylate, 8 parts of acrylamide, 7 parts of isooctyl methacrylate and 310 parts of ethyl acetate are sequentially poured into a container to be uniformly stirred, nitrogen is introduced for 30min, the temperature is raised to 65 ℃, and 0.35 part of azo-diisobutyronitrile serving as an initiator is added to form a mixture; the reaction is carried out for 2 hours, which is favorable for increasing the molecular weight of the polymer and increasing the cohesion and viscosity;
weighing 75 parts of 2-ethylhexyl acrylate, 13 parts of hydroxyethyl acrylate, 42 parts of isobornyl acrylate, 4 parts of acrylamide and 62 parts of ethyl acetate to prepare a dropwise adding mixture;
step three, raising the reaction temperature of the mixture to 73 ℃, dropwise adding the mixture and 0.45 part of initiator, continuously reacting, raising the temperature to 80 ℃, adding 0.4 part of initiator, and continuously reacting to fully react the monomers to obtain the acrylic ester glue;
step four, adding a proper amount of ethyl acetate to dilute the acrylic ester glue to a proper viscosity, cooling to below 50 ℃, adding 0.35 part of hydroxyanisole MEHQ and 0.33 part of isocyano ethyl methacrylate, and closing nitrogen and stirring for 5 hours;
and fifthly, adding a proper amount of thermosetting agent, photoinitiator, photo-curing agent and tackifying resin, and fully stirring to obtain the OCA optical adhesive.
The tackifying resin is C9 series tackifying resin, the sixth step is cured at low temperature for 3 days, the thermosetting agent is aliphatic polyamine, the dripping time of the dripping mixture in the third step is 1h, the reaction time at 73 ℃ in the third step is 2h, and the reaction time at 78 ℃ in the third step is 2h.
The high-viscosity OCA optical adhesive of the above examples 1-3 is coated on a heavy release film, oven-dried at 120 ℃ for 3min, and attached to a light release film to obtain a high-modulus OCA optical adhesive tape, and the corresponding properties are shown in Table 1:
TABLE 1
| Detecting items | Example 1 | Example 2 | Example 3 |
| Normal temperature holding force | >72h | >72h | >72h |
| Gel fraction (%) | 75.26 | 76.23 | 74.37 |
| Storage modulus at normal temperature (kPa) | 280 | 272 | 281 |
；
As shown by the evaluation results in Table 1, the high-viscosity OCA optical adhesives of examples 1 to 3 of the present invention have gel fractions (%) exceeding 74%, and normal temperature storage moduli (kPa) exceeding 270 kPa; the optical adhesive obtained by the high-viscosity OCA optical adhesive can prevent the phenomenon of uneven adhesive surface when filling electronic mobile equipment, improve the appearance, increase the yield and reduce the production cost.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (5)
1. The preparation process of the OCA optical adhesive is characterized by comprising the following steps of:
firstly, taking 120-130 parts of 2-ethylhexyl acrylate, 9-12 parts of hydroxyethyl acrylate, 60-65 parts of isobornyl acrylate, 6-8 parts of acrylamide, 6-8 parts of isooctyl methacrylate and 280-320 parts of ethyl acetate, sequentially pouring the monomers and the solvent into a container, uniformly stirring, introducing nitrogen, heating to 64-66 ℃, and adding 0.32-0.38 part of azo diisobutyronitrile serving as an initiator to form a mixture;
step two, weighing 70-80 parts of 2-ethylhexyl acrylate, 12-15 parts of hydroxyethyl acrylate, 40-45 parts of isobornyl acrylate, 3.8-4.2 parts of acrylamide and 55-65 parts of ethyl acetate to prepare a dropwise adding mixture;
thirdly, raising the reaction temperature of the mixture to 72-74 ℃, dropwise adding the mixture and 0.42-0.48 part of initiator, continuously reacting, raising the temperature to 77-81 ℃, adding 0.38-0.42 part of initiator, and continuously reacting to fully react monomers to obtain the acrylic ester glue;
fourth, adding a proper amount of ethyl acetate to dilute the acrylic ester glue to a proper viscosity, cooling to a temperature below 48-52 ℃, adding 0.32-0.38 part of hydroxyanisole and 0.32-0.38 part of isocyano ethyl methacrylate, and turning off nitrogen to stir for 6-8 hours; the method comprises the steps of carrying out a first treatment on the surface of the
And fifthly, adding a proper amount of thermosetting agent, photoinitiator, photo-curing agent and tackifying resin, and fully stirring to obtain the OCA optical adhesive.
2. The process for preparing the OCA optical adhesive according to claim 1, wherein the process comprises the steps of: the tackifying resin is C5 series tackifying resin, C9 series tackifying resin or terpene tackifying resin.
3. The process for preparing the OCA optical adhesive according to claim 1, wherein the process comprises the steps of: and step six, curing for 3 days at low temperature.
4. The process for preparing the OCA optical adhesive according to claim 1, wherein the process comprises the steps of: and the dripping time of the dripping mixture in the third step is 1h, the reaction time at 72-74 ℃ in the third step is 2h, and the reaction time at 77-81 ℃ in the third step is 2h.
5. The process for preparing the OCA optical adhesive according to claim 1, wherein the process comprises the steps of: the thermosetting agent is aliphatic polyamine or triethylene tetramine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211554452.5A CN116987448A (en) | 2022-12-06 | 2022-12-06 | Preparation process of OCA optical adhesive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211554452.5A CN116987448A (en) | 2022-12-06 | 2022-12-06 | Preparation process of OCA optical adhesive |
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| Publication Number | Publication Date |
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| CN116987448A true CN116987448A (en) | 2023-11-03 |
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| CN202211554452.5A Pending CN116987448A (en) | 2022-12-06 | 2022-12-06 | Preparation process of OCA optical adhesive |
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| Country | Link |
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| CN (1) | CN116987448A (en) |
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- 2022-12-06 CN CN202211554452.5A patent/CN116987448A/en active Pending
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