Moisture-curing organic silicon modified acrylate adhesive with high refractive index and preparation method of moisture-curing organic silicon modified acrylate adhesive

Abstract

The invention comprises two aspects: firstly, the moisture-curing organosilicone modified acrylate adhesive with high refractive index comprises the following components: 80-150 parts of a thiol compound; 224 to 360 parts of an acryloyloxy siloxane monomer containing a carbon-carbon double bond; 1-2% of a photoinitiator; 0.01%-0.1% of a catalyst; the invention also discloses a preparation method of the moisture-cured organic silicon modified acrylate adhesive with the high refractive index, which is used for preparing the moisture-cured organic silicon modified acrylate adhesive with the high refractive index as described in the first step. The preparation method comprises the following steps: S1, firstly synthesizing a prepolymer mixture of organic silicon modified acrylate containing a certain amount of moisture-curable siloxane groups and sulfur bonds, and S2, adding a catalyst for catalyzing moisture curing on the basis of the step S1, so as to prepare the moisture-curable organic silicon modified acrylate adhesive with high refractive index. The moisture-curing organic silicon modified acrylate adhesive with high refractive index prepared by the invention is high in adhesive performance and high in refractive index, and the refractive index is as high as 1.5 or above.

Description

Technical Field

[0001] The present invention relates to the technical field of the preparation of acrylic acid ester adhesives, and more particularly to a moisture-curable organosilicon-modified acrylic acid ester adhesive with a high refractive index and a preparation method thereof. Background Art

[0002] With the rapid development of 3C electronic consumer products, electronic products emerge in an endless stream, and various screens and optical properties are involved more and more widely, and the application surface is more and more extensive. Therefore, the environmental assessment received is becoming more and more stringent; the substrates to be bonded are more and more extensive, and various substrates may be used, from metals to nylons, etc.; it is understood that the current high refractive index adhesives are difficult to meet the above conditions at the same time, have poor universality for substrate bonding, are difficult to meet in the case of longer double 85 or salt spray performance tests, etc., and at the same time, the production and manufacturing process is complex.

[0003] Therefore, there is a lack of an adhesive that needs to meet higher optical performance requirements (with a high refractive index) and at the same time meet better adhesive performance requirements (the adhesive performance is strong adhesion and strong reliability). Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and provide a moisture-curable organosilicon-modified acrylic acid ester adhesive with a high refractive index and a preparation method thereof, and the prepared moisture-curable organosilicon-modified acrylic acid ester adhesive has strong adhesion and a high refractive index.

[0005] To achieve the above purpose, the present invention is realized through the following two aspects:

[0006] In the first aspect, a moisture-curable organosilicon-modified acrylic acid ester adhesive with a high refractive index, which comprises the following components:

[0007] 80 - 150 parts of thiol compound

[0008] 224 - 360 parts of acryloyloxy siloxane monomer containing carbon-carbon double bonds

[0009] 1 - 2% of photoinitiator

[0010] 0.01% - 0.1% of catalyst.

[0011] In the second aspect, a preparation method of a moisture-curable organosilicon-modified acrylic acid ester adhesive with a high refractive index, which is used to prepare a moisture-curable organosilicon-modified acrylic acid ester adhesive as described in the first aspect, and comprises the following preparation steps:

[0012] Step S1: First, synthesize a prepolymer mixture of organosilicon-modified acrylic acid ester containing a certain amount of moisture-curable siloxane groups and sulfur bonds, wherein the above preparation steps are:

[0013] Through a thiol compound, an acryloyloxy siloxane monomer containing a carbon-carbon double bond, and a photoinitiator, and then through ultraviolet irradiation, finally a prepolymer is synthesized by the click chemistry of the thiol and the carbon-carbon double bond olefin, thereby forming a prepolymer mixture of organosilicon-modified acrylate;

[0014] Step S2: Then, on the basis of Step S1, a catalyst for catalyzing moisture curing is added to obtain a moisture-curable organosilicon-modified acrylate adhesive with a high refractive index.

[0015] Preferably, the thiol compound contains at least three mercapto groups, and the acryloyloxy siloxane monomer containing a carbon-carbon double bond contains at least two siloxane groups.

[0016] Preferably, the thiol compound mainly includes polythiol 504, pentaerythritol tetra(3-mercaptopropionate) (PETMP), and trimethylolpropane tris(3-mercaptopropionate) (TMPMP).

[0017] Preferably, the acryloyloxy siloxane monomer containing a carbon-carbon double bond is a substance containing both a silicon methoxy group and an acyloxy group or a substance containing both a silicon ethoxy group and an acryloyloxy group.

[0018] Preferably, the acryloyloxy siloxane monomer containing a carbon-carbon double bond is one or a mixture of several of 3-(trimethoxysilyl)propyl methacrylate, 3-(triethoxysilyl)propyl methacrylate, 3-(methyldimethoxysilyl)propyl methacrylate, and 3-(methyldiethoxysilyl)propyl methacrylate.

[0019] Preferably, the photoinitiator is one or a mixture of several of photoinitiator 189, photoinitiator 1173, TPO photoinitiator, photoinitiator 184, and BDK photoinitiator.

[0020] Preferably, in Step S2, the catalyst for catalyzing moisture curing is one or a mixture of several of stannous octoate, dibutyltin dilaurate, and the acetylacetone chelate of dibutyltin dilaurate.

[0021] Preferably, in Step S1, the preparation steps of the prepolymer mixture of the organosilicon-modified acrylate are as follows:

[0022] Step S11: Put 80-150 parts of a thiol compound containing at least three mercapto groups and 224-360 parts of an acryloyloxy siloxane monomer containing at least two siloxane groups and a carbon-carbon double bond into a reaction flask and stir continuously. Among them, the molar ratio of the carbon-carbon double bond group of the acryloyloxy siloxane monomer to the mercapto group of the thiol compound is 1.1-1.05:1 for feeding;

[0023] Step S12: To avoid the influence of air humidity, protect it with high-purity nitrogen, then add 1-2% of BDK photoinitiator, and continuously irradiate it with ultraviolet light with a wavelength of 365 nm until the mercapto infrared absorption peak at 2500-2700 cm-1 disappears to determine that the reaction reaches the end point;

[0024] Step S13: Then, evacuate the remaining unreacted acryloyloxy siloxane monomer by negative pressure pumping at 80-100 °C;

[0025] In step S2, the preparation steps of the moisture-curing organosilicon-modified acrylate adhesive are as follows:

[0026] Finally, add 0.01%-0.1% of the catalyst and discharge to obtain a high-refractive-index moisture-curing organosilicon-modified acrylate adhesive.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] A high-refractive-index moisture-curing organosilicon-modified acrylate adhesive and a preparation method thereof according to the present invention first synthesize a prepolymer mixture containing a certain amount of siloxane groups (i.e., at least two siloxane groups) and sulfur bonds (i.e., at least three mercapto groups) through thiol-alkene click chemistry, and then add a moisture-curing catalyst to obtain the moisture-curing organosilicon-modified acrylate adhesive of the present invention. It has a high refractive index (refractive index greater than 1.5), wide applicability to substrate bonding, high adhesive force, and excellent reliability, and is expected to be used in more stringent optical bonding applications. Specific Embodiments

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only one embodiment of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Example 1

[0031] Example 1 of the present invention provides a high-refractive-index moisture-curing organosilicon-modified acrylate adhesive, which includes the following components:

[0032] 80-150 parts of thiol compound

[0033] 224-360 parts of acryloyloxy siloxane monomer containing carbon-carbon double bonds

[0034] 1-2% of photoinitiator

[0035] 0.01%-0.1% of catalyst.

[0036] Example 2

[0037] Example 2 of the present invention provides a method for preparing a moisture-curable organosilicon-modified acrylate adhesive with a high refractive index, which is used to prepare a moisture-curable organosilicon-modified acrylate adhesive with a high refractive index as described in Example 1. The preparation steps include the following:

[0038] Step S1: First, synthesize a prepolymer mixture of organosilicon-modified acrylate containing a certain amount of moisture-curable siloxane groups and sulfur bonds. The above preparation steps are as follows:

[0039] Through a thiol compound, an acryloyloxy siloxane monomer containing a carbon-carbon double bond, and a photoinitiator, and then through ultraviolet light irradiation, finally use the click chemistry of thiol and carbon-carbon double bond olefins to synthesize a prepolymer, thereby forming a prepolymer mixture of organosilicon-modified acrylate;

[0040] Step S2: Then, on the basis of Step S1, add a catalyst for catalytic moisture curing to obtain a moisture-curable organosilicon-modified acrylate adhesive with a high refractive index.

[0041] Among them, in the prepolymer mixture of organosilicon-modified acrylate, the same molecular structural formula contains both siloxane groups and sulfur bonds.

[0042] Among them, the thiol compound contains at least three mercapto groups, and the acryloyloxy siloxane monomer containing a carbon-carbon double bond contains at least two siloxane groups.

[0043] Among them, the thiol compound mainly includes polythiol 504, pentaerythritol ester of mercaptopropionic acid (PETMP), trimethylolpropane tris(3-mercaptopropionate) (TMPMP), etc. Specifically, the mercapto content and refractive index of the above substances are not necessarily fixed, but the refractive index of the above substances can be greater than 1.5.

[0044] Among them, the acryloyloxy siloxane monomer containing a carbon-carbon double bond is a substance containing both silicon methoxy and acryloxy groups or a substance containing both silicon ethoxy and acryloxy groups. More specifically, the acryloyloxy siloxane monomer containing a carbon-carbon double bond is one or a mixture of several of methylacryloyloxypropyltrimethoxysilane, methylacryloyloxypropyltriethoxysilane, methylacryloyloxypropylmethyldimethoxysilane, methylacryloyloxypropylmethyldiethoxysilane, etc.

[0045] Among them, the photoinitiator is one or a mixture of several of photoinitiator 189, photoinitiator 1173, TPO photoinitiator, photoinitiator 184, and BDK photoinitiator.

[0046] Among them, in step S2, the catalyst for catalyzing moisture curing is one or more of stannous octoate, dibutyltin dilaurate, and the acetylacetone chelate of dibutyltin dilaurate.

[0047] Example 3

[0048] Example 3 of the present invention provides a preparation method of a moisture-curing organosilicon-modified acrylate adhesive with a high refractive index. This preparation method is the specific preparation steps of the preparation method in Example 2, and it is used to prepare a moisture-curing organosilicon-modified acrylate adhesive as described in Example 1. It includes the following preparation steps:

[0049] Step S1: First, synthesize a prepolymer mixture of an organosilicon-modified acrylate containing a certain amount of moisture-curable siloxane groups and sulfur bonds. Among them, through a thiol compound, an acryloyloxy siloxane monomer containing a carbon-carbon double bond, plus a photoinitiator, and then through ultraviolet light irradiation, and finally using the click chemistry of thiol and carbon-carbon double bond olefins to synthesize the prepolymer, thereby forming a prepolymer mixture of an organosilicon-modified acrylate. The specific preparation steps are as follows:

[0050] Step S11: Put 80-150 parts of a thiol compound containing at least three mercapto groups and 224-360 parts of an acryloyloxy siloxane monomer containing at least two siloxane groups and a carbon-carbon double bond into a reaction flask and stir continuously. Among them, the molar ratio of the carbon-carbon double bond group of the acryloyloxy siloxane monomer to the mercapto group of the thiol compound is 1.1-1.05:1 for feeding;

[0051] Step S12: Protect from the influence of air humidity through high-purity nitrogen protection, then add 1-2% of BDK photoinitiator, and continuously irradiate with ultraviolet light of 365 nm wavelength until the disappearance of the mercapto infrared absorption peak at 2500-2700 cm-1 is used to judge that the reaction reaches the end point;

[0052] Step S13: Then evacuate the remaining unreacted acryloyloxy siloxane by negative pressure at 80-100 °C;

[0053] Step S2: Then, on the basis of step S1, add a catalyst for catalyzing moisture curing to obtain a moisture-curing organosilicon-modified acrylate adhesive with a high refractive index (the high refractive index is a refractive index greater than 1.5). The specific preparation steps are as follows:

[0054] Finally, add 0.01%-0.1% catalyst and discharge to obtain a moisture-curing organosilicon-modified acrylate adhesive with a high refractive index.

[0055] Example 4:

[0056] Example 3 of the present invention provides experimental data on the adhesion test, heat resistance test, salt spray test, volume resistivity, and dielectric strength test of a high refractive index moisture-curing organosilicon-modified acrylate adhesive, a moisture-curing organosilicon-modified adhesive, and a moisture-curing organosilicon-modified acrylate adhesive with only one siloxane group, all prepared by the specific preparation method of Example 3.

[0057] First:

[0058] This experimental data has three experimental examples and two comparative examples. Among them, the components and preparation methods of Experimental Examples 1 to 3 are as follows:

[0059] Experimental Example 1

[0060] In step S1, the preparation steps of the prepolymer mixture of the organosilicon-modified acrylate are as follows:

[0061] Step S11: Put 100 parts of PETMP and 224 parts of methacryloxypropyltrimethoxysilane (feeding with a molar ratio of carbon-carbon double bond group to mercapto group of 1.1:1) into a reaction flask and continuously stir at room temperature for half an hour to evenly mix the above two substances.

[0062] Step S12: While introducing high-purity nitrogen to protect against the influence of air humidity, add 1% of BDK photoinitiator and stir for half an hour. Then, irradiate continuously with ultraviolet light of 365 nm wavelength while stirring, take samples every half an hour for infrared testing, and judge that the reaction reaches the end point until the mercapto infrared absorption peak at 2500 - 2700 cm-1 disappears.

[0063] Step S13: Then, during stirring, evacuate the remaining unreacted methacryloxypropyltrimethoxysilane by negative pressure pumping at 100 °C (vacuum degree -0.01 Mpa).

[0064] In step S2, the preparation steps of the moisture-curing organosilicon-modified acrylate adhesive are as follows:

[0065] Finally, add 0.01% of the catalyst dibutyltin dilaurate and stir for half an hour, then discharge to obtain a moisture-curing organosilicon-modified acrylate adhesive with a high refractive index (refractive index 1.56).

[0066] Experimental Example 2

[0067] In step S1, the preparation steps of the prepolymer mixture of the organosilicon-modified acrylate are as follows:

[0068] Step S11: Put 150 parts of TMPMP and 360 parts of 3-(Trimethoxysilyl)propyl methacrylate (feeding with a molar ratio of carbon-carbon double bond groups to mercapto groups of 1.1:1) into a reaction flask and continuously stir at room temperature for half an hour to uniformly mix the above two substances.

[0069] Step S12: While introducing high-purity nitrogen for protection to avoid the influence of air humidity, add 2% of photoinitiator 1173 and stir for half an hour. Then, continuously irradiate with ultraviolet light at a wavelength of 365 nm while stirring, take samples every half an hour for infrared testing, and judge that the reaction reaches the end point until the mercapto infrared absorption peak at 2500 - 2700 cm-1 disappears.

[0070] Step S13: Then, during stirring, evacuate the remaining unreacted 3-(Trimethoxysilyl)propyl methacrylate by negative pressure pumping at 100 °C (vacuum degree -0.01 Mpa).

[0071] In Step S2, the preparation steps of the moisture-curing organosilicon-modified acrylate adhesive are as follows:

[0072] Finally, add 0.1% of catalyst stannous octoate and stir for half an hour, then discharge to obtain a moisture-curing organosilicon-modified acrylate adhesive with a high refractive index (refractive index 1.54).

[0073] Experimental Example 3

[0074] In Step S1, the preparation steps of the prepolymer mixture of the organosilicon-modified acrylate are as follows:

[0075] Step S11: Put 80 parts of polythiol 504 and 235 parts of methacryloxypropylmethyldimethoxysilane (feeding with a molar ratio of carbon-carbon double bond groups to mercapto groups of 1.1:1) into a reaction flask and continuously stir at room temperature for half an hour to uniformly mix the above two substances.

[0076] Step S12: While introducing high-purity nitrogen for protection to avoid the influence of air humidity, add 2% of photoinitiator 184 and stir for half an hour. Then, continuously irradiate with ultraviolet light at a wavelength of 365 nm while stirring, take samples every half an hour for infrared testing, and judge that the reaction reaches the end point until the mercapto infrared absorption peak at 2500 - 2700 cm-1 disappears.

[0077] Step S13: Then, during stirring, evacuate the remaining unreacted methacryloxypropylmethyldimethoxysilane by negative pressure pumping at 100 °C (vacuum degree -0.01 Mpa).

[0078] In Step S2, the preparation steps of the moisture-curing organosilicon-modified acrylate adhesive are as follows:

[0079] Finally, add 0.05% of the catalyst, the acetylacetone chelate of dibutyltin dilaurate, stir for half an hour, and then discharge to obtain a moisture-curing organosilicon-modified acrylate adhesive with a high refractive index (refractive index 1.63).

[0080] Comparative Example 1

[0081] Step S11: Put 50 parts of n-butyl mercaptopropionate (containing one mercapto group) and 84 parts of methacryloxypropyltrimethoxysilane (feeding with a molar ratio of carbon-carbon double bond group to mercapto group of 1.1:1) into the reaction flask and continuously stir at room temperature for half an hour. The purpose is to uniformly mix the above two substances.

[0082] Step S12: At the same time, introduce high-purity nitrogen for protection to avoid the influence of air humidity. Then add 1% of 184 photoinitiator and stir for half an hour. Then, while stirring, continuously irradiate with ultraviolet light of 365 nm wavelength. Take samples every half an hour for infrared testing until the mercapto infrared absorption peak at 2500 - 2700 cm-1 disappears to determine that the reaction reaches the end point.

[0083] Step S13: Then, during the stirring process, evacuate the remaining unreacted methacryloxypropyltrimethoxysilane by negative pressure pumping at 100 °C (vacuum degree -0.01 Mpa).

[0084] Step S2: Finally, add 0.05% of the catalyst, dibutyltin dilaurate, stir for half an hour, and then discharge to obtain a moisture-curing organosilicon-modified adhesive (refractive index 1.44).

[0085] Comparative Example 2

[0086] Step S11: Put 100 parts of PETMP and 430 parts of methacryloxypropyl dimethylmethoxysilane (containing one siloxane group, feeding with a molar ratio of carbon-carbon double bond group to mercapto group of 1.1:1) into the reaction flask and continuously stir at room temperature for half an hour.

[0087] Step S12: The purpose is to uniformly mix the above two substances. At the same time, introduce high-purity nitrogen for protection to avoid the influence of air humidity. Then add 2% of TPO photoinitiator and stir for half an hour. Then, while stirring, continuously irradiate with ultraviolet light of 365 nm wavelength. Take samples every half an hour for infrared testing until the mercapto infrared absorption peak at 2500 - 2700 cm-1 disappears to determine that the reaction reaches the end point.

[0088] Step S13: Then, during the stirring process, evacuate the remaining unreacted methacryloxypropyltrimethoxysilane by negative pressure pumping at 100 °C (vacuum degree -0.01 Mpa).

[0089] Step S2: Finally, add 0.01% of the catalyst dibutyltin dilaurate and stir for half an hour, then discharge to obtain a moisture-curing silicone-modified acrylate adhesive with a high refractive index (refractive index 1.54).

[0090] Secondly,

[0091] Perform adhesion tests, salt spray tests, refractive index tests, shear strength tests, and boiling water strength tests on the above five test samples of Example 4 (the five test samples refer to the test samples of Experimental Examples 1 to 3 and Comparative Examples 4 to 5). Among them, the test items and test methods are as follows:

[0092] Adhesion test: GB / T 9286-1998.

[0093] Salt spray test: GB / T 1771-1991 Determination of resistance to neutral salt spray of paints and varnishes

[0094] Refractive index test: GB / T 614-2006

[0095] Shear strength: GB / T7124-2008: Determination of tensile shear strength of adhesives

[0096] Boiling water strength: Boil in boiling water at 100 °C for 4 hours, then return to room temperature and measure the PC bonding strength. Finally,

[0097] The experimental data after the above-mentioned item tests are shown in Table 1 below:

[0098] Table 1 shows the performance test results of the above-mentioned test items

[0099]

[0100] Therefore, from the performance test results in Table 1, it can be known that

[0101] The high refractive index moisture-curing silicone-modified acrylate adhesives prepared in Experimental Examples 1-3 have high adhesive strength, a wide range of bonding substrates (taking PC plastic, aluminum, and 304 steel as examples), and high reliability (salt spray resistance (while the adhesion is indirectly evaluated through the salt spray test), boiling water). They have a relatively high refractive index (all greater than 1.5). In Comparative Example 1, when the introduced mercapto group is less, the refractive index is lower. In Comparative Example 2, when the introduced siloxane group is less, the number of adhered substrates is less, resulting in a smaller adhesion.

[0102] Therefore, based on the experimental data and experimental results of Example 4, the following experimental conclusions can be drawn:

[0103] A kind of moisture-curing organosilicon-modified acrylate adhesive with high refractive index (referring to Example 1) and its preparation method (referring to Examples 2 and 3) of the present invention are obtained based on the following method: Firstly, through the click chemistry of thiol-alkene, a prepolymer mixture containing a certain amount of siloxane groups (at least two siloxane groups) and sulfur bonds (at least three mercapto groups) is synthesized, and then a moisture-curing catalyst is added to prepare the moisture-curing organosilicon-modified acrylate adhesive of the present invention, which has a high refractive index (refractive index greater than 1.5), wide applicability for substrate bonding, high adhesive force, and excellent reliable performance, and is expected to be used in more stringent optical bonding occasions.

[0104] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A moisture-curable silicone-modified acrylate adhesive with a high refractive index, characterized in that It includes the following components: 80 - 150 parts of thiol compound 224 - 360 parts of acryloyloxy siloxane monomer containing carbon - carbon double bond 1 - 2% of photoinitiator 0.01% - 0.1% of catalyst.

2. A preparation method of a moisture-curing organosilicon-modified acrylate adhesive with a high refractive index, characterized in that, It is used for preparing a moisture - curable organosilicon - modified acrylate adhesive with high refractive index as described in claim 1, and it includes the following preparation steps: Step S1: First, synthesize a prepolymer mixture of organosilicon - modified acrylate containing a certain amount of moisture - curable siloxane groups and sulfur bonds. Among them, the above - mentioned preparation steps are: Through thiol compound, acryloyloxy siloxane monomer containing carbon - carbon double bond, plus photoinitiator, and then through ultraviolet light irradiation, finally use the click chemistry of thiol and carbon - carbon double - bond olefins to synthesize prepolymer, thereby forming a prepolymer mixture of organosilicon - modified acrylate; Step S2: Then, on the basis of step S1, add a catalyst for catalytic moisture curing to obtain a moisture - curable organosilicon - modified acrylate adhesive with high refractive index.

3. The preparation method of a moisture-curable organosilicon-modified acrylate adhesive with a high refractive index according to claim 2, characterized in that, The thiol compound contains at least three mercapto groups, and the acryloyloxy siloxane monomer containing carbon - carbon double bond contains at least two siloxane groups.

4. The preparation method of a moisture-curing organosilicon-modified acrylate adhesive with high refractive index according to claim 2 or 3, characterized in that, The thiol compound mainly includes polythiol 504, pentaerythritol ester of mercaptopropionic acid (PETMP) and trimethylolpropane tris(3 - mercaptopropionate) (TMPMP).

5. The preparation method of a moisture-curable organosilicon-modified acrylate adhesive with a high refractive index according to claim 2 or 3, characterized in that, The acryloyloxy siloxane monomer containing carbon - carbon double bond is a substance containing both silicon methoxy group and acyloxy group or a substance containing both silicon ethoxy group and acryloyloxy group.

6. The preparation method of a moisture-curing organosilicon-modified acrylate adhesive with a high refractive index according to claim 5, characterized in that, The acryloyloxy siloxane monomer containing carbon - carbon double bond is one or a mixture of methylacryloyloxypropyltrimethoxysilane, methylacryloyloxypropyltriethoxysilane, methylacryloyloxypropylmethyldimethoxysilane, and methylacryloyloxypropylmethyldiethoxysilane.

7. The preparation method of a high refractive index moisture-curing organosilicon-modified acrylate adhesive according to claim 2, characterized in that, The photoinitiator is one or a mixture of photoinitiator 189, photoinitiator 1173, TPO photoinitiator, photoinitiator 184, and BDK photoinitiator.

8. The preparation method of a wet-curing silicone-modified acrylate adhesive with a high refractive index according to claim 1, characterized in that, In step S2, the catalyst for catalytic moisture curing is one or a mixture of stannous octoate, dibutyltin dilaurate, and acetylacetone chelate of dibutyltin dilaurate.

9. According to the preparation method of a moisture - curable organosilicon - modified acrylate adhesive with high refractive index as described in claim 2, it is characterized in that In step S1, the preparation steps of the prepolymer mixture of organosilicon - modified acrylate are: Step S11: Put 80 - 150 parts of thiol compound containing at least three mercapto groups and 224 - 360 parts of acryloyloxy siloxane monomer containing at least two siloxane groups and carbon - carbon double bond into a reaction flask and stir continuously. Among them, the molar ratio of the carbon - carbon double - bond group of acryloyloxy siloxane monomer to the mercapto group of thiol compound is 1.1 - 1.05:1 for feeding; Step S12: Protect from the influence of air humidity by high - purity nitrogen protection, then add 1 - 2% of BDK photoinitiator, and continuously irradiate with ultraviolet light of 365 nm wavelength until the disappearance of the mercapto infrared absorption peak at 2500 - 2700 cm - 1 to judge that the reaction reaches the end point; Step S13: Then, the remaining unreacted acryloxysiloxane monomers are removed by negative pressure evacuation at 80 - 100 °C. In step S2, the preparation steps of the moisture-curing organosilicon-modified acrylate adhesive are as follows: Finally, 0.01% - 0.1% catalyst is added and then discharged to obtain a moisture-curing organosilicon-modified acrylate adhesive with a high refractive index.

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