Two-component sealing water-blocking glue, preparation method and application thereof

Abstract

The application provides a two-component sealing water-blocking glue and a preparation method and application thereof, the two-component sealing water-blocking glue comprises A component and B component, the A component comprises the following components in parts by weight: silane modified resin 60-120 parts, filler 60-200 parts, curing agent 2-40 parts, anti-aging auxiliary agent 0.5-3.5 parts and thixotropic agent 0.1-5 parts; the B component comprises the following components in parts by weight: first polyol 60-120 parts, filler 60-300 parts, first catalyst 0.1-2 parts and thixotropic agent 0.1-5 parts. The two-component sealing water-blocking glue has excellent water vapor barrier performance, substrate bonding strength, tensile strength and elongation at break. The sealing glue is used in the fields of assembly frame edge sealing, junction box bonding, junction box potting, back plate repair bonding and the like.

Description

Technical Field

[0001] This invention belongs to the field of adhesive technology, and relates to a two-component sealing and water-blocking adhesive, its preparation method, and its application. Background Technology

[0002] In recent years, with the continuous growth of the global economy and people's increasing pursuit of a higher standard of living, the demand for fossil fuels has also grown rapidly, and the price of fossil fuels has risen accordingly. However, the large amount of greenhouse gases produced by fossil fuels has cast a shadow over the future of humanity. Meanwhile, with the conclusion of the United Nations Climate Change Conference (COP26) in Glasgow, UK, most countries and regions around the world have made clear plans for greenhouse gas emissions. In order to meet the ever-growing energy market demand and reduce dependence on fossil fuels, human society urgently needs to find green energy to replace traditional energy sources. Among the many green energy options, the installed capacity of photovoltaic power generation is constantly expanding, and the market size for clean and renewable energy applications, represented by photovoltaics, continues to grow.

[0003] In recent years, as the photovoltaic market has shifted from quantity to quality, maximizing the power generation efficiency of photovoltaic modules per unit area has become a key focus of photovoltaic development. With the continuous development of photovoltaic technology, N-type high-efficiency bifacial modules have begun to receive increasing attention. Within the field of N-type high-efficiency bifacial modules, crystalline silicon heterojunction solar cells (HJTs) have become a new favorite in the photovoltaic industry due to their advantages such as fewer production steps and lower temperature coefficient.

[0004] However, unlike traditional photovoltaic modules, HJT photovoltaic modules require more stringent encapsulation materials. Most manufacturers use a "butyl tape + silicone" encapsulation process, where the butyl tape at the bottom blocks moisture, and the silicone then bonds the various parts of the module together. While this solution solves the problems of HJT modules, the high price of the materials and the cumbersome production process increase the cost of photovoltaic modules. Currently, no new solution has emerged in the mainstream market to replace this method on a large scale.

[0005] Therefore, there is a need in the field to develop a sealant that not only has excellent performance but is also low in cost and simple to process. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a two-component sealing water-blocking adhesive, its preparation method, and its application.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a two-component sealing and water-blocking adhesive, the two-component sealing and water-blocking adhesive comprising component A and component B.

[0009] Component A, by weight, comprises the following components:

[0010]

[0011] Component B, by weight, comprises the following components:

[0012]

[0013] This invention, through the screening of specific components and the limitation of their content, especially the introduction of silane-modified resin, enables the two-component sealing and water-blocking adhesive to have excellent adhesion performance to substrates such as backsheets, aluminum alloy frames, glass, and junction boxes in photovoltaic modules, while providing good sealing and water-blocking properties.

[0014] Preferably, the silane-modified resin is prepared by the following method:

[0015] The second polyol is evacuated at 100-140℃ (e.g., 100℃, 110℃, 120℃, 130℃, 140℃, etc.), and then cooled to 60-90℃ (e.g., 60℃, 70℃, 80℃, 90℃, etc.) under vacuum conditions. The vacuum is then removed, and silane and a second catalyst are added to react and obtain the silane-modified resin.

[0016] Preferably, the second polyol comprises any one or a combination of at least two of castor oil derivative polyols, soybean oil polyols, palm oil polyols, rosin ester polyols, or polyolefin polyols.

[0017] Preferably, the silane comprises 3-isocyanopropyltrimethoxysilane and / or 3-isocyanopropyltriethoxysilane.

[0018] Preferably, the second catalyst comprises any one or a combination of at least two of the following: stannous octoate, dibutyltin dilaurate, bismuth isooctanoate, tetrabutyl titanate, dimethylethanolamine, triethylenediamine, N-methylmorpholine, or N-ethylmorpholine.

[0019] Preferably, the mass ratio of the second polyol to silane is (1-9):1, where 1-9 can be, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, etc.

[0020] Preferably, the mass ratio of the second polyol to the second catalyst is (6000-11000):1, where 6000-11000 can be, for example, 6000, 7000, 8000, 9000, 10000, 11000, etc.

[0021] Preferably, the reaction temperature is 60-80℃, such as 60℃, 65℃, 70℃, 75℃, 80℃, etc., and the reaction time is 4-6 hours, such as 4 hours, 5 hours, 6 hours, etc.

[0022] Preferably, the fillers of components A and B each independently include any one or a combination of at least two of the following: zinc oxide, aluminum hydroxide, magnesium oxide, magnesium hydroxide, silica powder, fumed silica, titanium dioxide, heavy calcium carbonate, precipitated barium sulfate, zinc borate, or wollastonite.

[0023] Preferably, the curing agent comprises any one or a combination of at least two of the following: hexamethylene diisocyanate, hexamethylene diisocyanate trimer, toluene diisocyanate, toluene diisocyanate trimer, diphenylmethane diisocyanate, diphenylmethane diisocyanate trimer, isoflurane diisocyanate, isoflurane diisocyanate trimer, dicyclohexylmethane-4,4'-diisocyanate, dicyclohexylmethane-4,4'-diisocyanate trimer, phenylmethylene diisocyanate, phenylmethylene diisocyanate trimer, tetramethylisophthalimethylene diisocyanate, or tetramethylisophthalimethylene diisocyanate trimer.

[0024] Preferably, the anti-aging additive includes any one or a combination of at least two of the following: ultraviolet absorber UV571, light stabilizer 292, anti-aging additive 1010, hydrolytic stabilizer carbodiimide, 4-isopropyldiphenylcarbodiimide, glycidyl ether epoxy compounds, or bisphenol A glycidyl ether.

[0025] Preferably, the thixotropic agents in components A and B each independently comprise any one or a combination of at least two of fumed silica, carbon black, organobentonite, alumina, attapulgite, or fluorinated graphene.

[0026] Preferably, the first polyol comprises any one or a combination of at least two of castor oil, castor oil derivative polyol, soybean oil polyol, palm oil polyol, rosin ester polyol, polyolefin polyol, or 1,2-propanediol.

[0027] Preferably, the first catalyst comprises any one or a combination of at least two of the following: stannous octoate, dibutyltin dilaurate, bismuth isooctanoate, tetrabutyl titanate, dimethylethanolamine, triethylenediamine, N-methylmorpholine, or N-ethylmorpholine.

[0028] In a second aspect, the present invention provides a method for preparing a two-component sealing and water-blocking adhesive as described in the first aspect, the method comprising the following steps:

[0029] (1) Add silane-modified resin, filler and thixotropic agent into planetary mixer, disperse until there are no obvious particles and the paste is uniform, heat up, stir, vacuum, dehydrate; then cool down, add curing agent and anti-aging agent under nitrogen protection, continue stirring to obtain component A;

[0030] (2) Add the first polyol, filler and thixotropic agent into a planetary mixer, disperse until there are no obvious particles and the paste is uniform, heat up, stir and dehydrate; then cool down, add the first catalyst gradually under nitrogen protection, and continue stirring to obtain component B.

[0031] (3) Mix component A and component B to obtain the two-component sealing water-blocking adhesive.

[0032] Preferably, the temperature rise in step (1) is to rise to 50-100°C, such as 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, etc.

[0033] Preferably, the stirring rate in step (1) is 200 to 600 rpm, such as 200 rpm, 300 rpm, 400 rpm, 500 rpm, 600 rpm, etc.

[0034] Preferably, the vacuuming in step (1) is performed at a pressure of <-0.09MPa (e.g., -0.1MPa, -0.12MPa, -0.14MPa, etc.).

[0035] Preferably, the dehydration time in step (1) is 1 to 3 hours, for example, 1 hour, 2 hours, 3 hours, etc.

[0036] Preferably, the cooling in step (1) is to cool down to 50-60°C, such as 50°C, 55°C, 60°C, etc.

[0037] Preferably, the temperature rise in step (2) is to rise to 50-100°C, such as 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, etc.

[0038] Preferably, the stirring speed in step (2) is 300 to 500 rpm, such as 300 rpm, 350 rpm, 400 rpm, 450 rpm, 500 rpm, etc.

[0039] Preferably, the dehydration time in step (2) is 2 to 3 hours, such as 2 hours, 2.5 hours, 3 hours, etc.

[0040] Preferably, the cooling in step (2) is to cool down to 50-60°C, such as 50°C, 55°C, 60°C, etc.

[0041] Thirdly, the present invention provides an application of the two-component sealing and water-blocking adhesive as described in the first aspect in photovoltaic modules.

[0042] Preferably, the two-component sealing and water-blocking adhesive is used for edge sealing of component frames, bonding of junction boxes, potting of junction boxes, or repair and bonding of back panels.

[0043] Compared with the prior art, the present invention has at least the following beneficial effects:

[0044] (1) The two-component sealing and water-blocking adhesive provided by this invention, after being cured at 25°C for 168 hours, has a water-blocking value of 0.5–10 g / (m³). 2 (Day), meets design requirements;

[0045] (2) The two-component sealing and water-blocking adhesive provided by the present invention is applied to the surface of different materials, such as photovoltaic backsheets (PET, fluorine coating, acrylic coating), photovoltaic glass, aluminum alloy and junction boxes. After curing, the adhesive strength is good after testing. This result can replace the mainstream tape and silicone process.

[0046] (3) The mechanical properties and water-blocking properties of the two-component sealing and water-blocking adhesive provided by the present invention are still excellent after the PCT 48-hour aging test, which will ensure that the two-component sealing and water-blocking adhesive can still maintain high performance after a long period of use. Detailed Implementation

[0047] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0048] Preparation Example 1

[0049] This preparation example provides a silane-modified resin, the preparation method of which includes: mixing 210 parts by mass of a polyolefin polyol (Krevili) HLBH-P3000 was first evacuated at 120°C for 2 hours, and then cooled to 80°C under vacuum. The vacuum was then removed, and 24.1 parts by mass of 3-isocyanate-propyltrimethoxysilane and 0.02 parts by mass of dibutyltin dilaurate were added. The mixture was reacted at 80°C for 4 hours to obtain the silane-modified resin.

[0050] Preparation Example 2

[0051] This preparation example provides a silane-modified resin, the preparation method of which includes: first, 600 parts by mass of castor oil derivative polyol (Ito Oils, Japan, Uric Y403) is evacuated at 120°C for 2 hours, and then cooled to 65°C under vacuum conditions. The vacuum is then removed, and 415 parts by mass of 3-isocyanate-propyltriethoxysilane and 0.1 parts by mass of dibutyltin dilaurate are added. The mixture is reacted at 65°C for 6 hours to obtain the silane-modified resin.

[0052] Comparative Preparation Example 1

[0053] The only difference between this comparative preparation example and preparation example 1 is that the mass fraction of the polyolefin polyol is 241 parts.

[0054] Comparative Preparation Example 2

[0055] The only difference between this comparative preparation example and preparation example 1 is that the mass fraction of the polyolefin polyol is 20 parts.

[0056] Comparative preparation example 3

[0057] The only difference between this comparative preparation example and preparation example 1 is that 3-isocyanate-propyltrimethoxysilane is replaced with an equal mass of triphenylaminosilane.

[0058] Example 1

[0059] This embodiment provides a two-component sealing and water-blocking adhesive, which includes component A and component B, and the preparation method includes the following steps:

[0060] (1) 60 parts of the silane-modified resin prepared in Preparation Example 1, 100 parts of the filler titanium dioxide, and 0.3 parts of the thixotropic agent fumed silica were added to a planetary mixer and dispersed until there were no obvious particles and the mixture was a uniform paste. The temperature was raised to 70°C, the stirring was turned on at 500 rpm, the vacuum was drawn at <-0.09 MPa, and the mixture was dehydrated for 1 hour. Then the temperature was lowered to 50°C, and under nitrogen protection, 5 parts of the curing agent toluene diisocyanate trimer (Desmodur T80) and 0.7 parts of the anti-aging agent 1010 were gradually added and stirred evenly. The mixture was then dispensed into containers to obtain component A.

[0061] (2) Add 60 parts of polyol 1,2-propanediol, 100 parts of filler titanium dioxide, and 5 parts of thixotropic agent fumed silica into a planetary mixer and disperse until there are no obvious particles and the mixture is a uniform paste. Then heat the mixture to 70°C, stir at 500 rpm, and dehydrate for 2 hours. Then cool the mixture to 50°C and gradually add 0.5 parts of catalyst dibutyltin disilicate under nitrogen protection. Stir until uniform, dispense the mixture, and obtain component B.

[0062] (3) Mix component A and component B to obtain the two-component sealing water-blocking adhesive.

[0063] Example 2

[0064] This embodiment provides a two-component sealing and water-blocking adhesive, which includes component A and component B, and the preparation method includes the following steps:

[0065] (1) 60 parts of the silane-modified resin prepared in Preparation Example 1, 100 parts of the filler heavy calcium carbonate, and 0.5 parts of the thixotropic agent fumed silica were added to a planetary mixer and dispersed until there were no obvious particles and the mixture was a uniform paste. The mixture was then heated to 70°C, stirred at 500 rpm, and vacuumed at <-0.09 MPa for 1 hour to remove water. The mixture was then cooled to 50°C and 5 parts of the curing agent toluene diisocyanate and 0.7 parts of the anti-aging agent 1010 were gradually added under nitrogen protection and stirred until homogeneous. The mixture was then dispensed into containers to obtain component A.

[0066] (2) Add 60 parts of polyol 1,2-propanediol, 100 parts of filler heavy calcium carbonate, and 5 parts of thixotropic agent fumed silica into a planetary mixer. Disperse until there are no obvious particles and the mixture is a uniform paste. Then heat to 70°C and stir at 500 rpm for 2 hours to dehydrate. Then cool to 50°C and gradually add 0.5 parts of catalyst dibutyltin disilicate under nitrogen protection. Stir until uniform and dispense to obtain component B.

[0067] (3) Mix component A and component B to obtain the two-component sealing water-blocking adhesive.

[0068] Example 3

[0069] This embodiment provides a two-component sealing and water-blocking adhesive, which includes component A and component B, and the preparation method includes the following steps:

[0070] (1) 60 parts of the silane-modified resin prepared in Preparation Example 2, 100 parts of the filler heavy calcium carbonate, and 0.5 parts of the thixotropic agent fumed silica were added to a planetary mixer and dispersed until there were no obvious particles and the mixture was a uniform paste. The mixture was then heated to 70°C, stirred at 500 rpm, and vacuumed at <-0.09 MPa for 1 hour to remove water. The mixture was then cooled to 50°C and 5 parts of the curing agent toluene diisocyanate and 0.7 parts of the anti-aging agent 1010 were gradually added under nitrogen protection and stirred until homogeneous. The mixture was then dispensed into containers to obtain component A.

[0071] (2) Add 60 parts of polyol 1,2-propanediol, 100 parts of filler heavy calcium carbonate, and 0.5 parts of thixotropic agent fumed silica into a planetary mixer. Disperse until there are no obvious particles and the mixture is a uniform paste. Then heat to 70°C and stir at 500 rpm for 2 hours to dehydrate. Then cool to 50°C and gradually add 0.5 parts of catalyst dibutyltin disilicate under nitrogen protection. Stir until uniform and dispense to obtain component B.

[0072] (3) Mix component A and component B to obtain the two-component sealing water-blocking adhesive.

[0073] Example 4

[0074] This embodiment provides a two-component sealing and water-blocking adhesive, which includes component A and component B, and the preparation method includes the following steps:

[0075] (1) 60 parts of the silane-modified resin prepared in Preparation Example 2, 80 parts of the filler heavy calcium carbonate, and 0.5 parts of the thixotropic agent fumed silica were added to a planetary mixer and dispersed until there were no obvious particles and the mixture was a uniform paste. The mixture was then heated to 70°C, stirred at 500 rpm, and vacuumed at <-0.09 MPa for 1 hour to remove water. The mixture was then cooled to 50°C and 7 parts of the curing agent toluene diisocyanate and 0.7 parts of the anti-aging agent 10100 were gradually added under nitrogen protection and stirred until homogeneous. The mixture was then dispensed into containers to obtain component A.

[0076] (2) Add 60 parts of polyol 1,2-propanediol, 80 parts of filler heavy calcium carbonate, and 0.5 parts of thixotropic agent fumed silica into a planetary mixer and disperse until there are no obvious particles and the mixture is a uniform paste. Then heat the mixture to 70°C, stir at 500 rpm, and dehydrate for 2 hours. Then cool the mixture to 50°C and gradually add 0.5 parts of catalyst dibutyltin disilicate under nitrogen protection. Stir until uniform, dispense the mixture, and obtain component B.

[0077] (3) Mix component A and component B to obtain the two-component sealing water-blocking adhesive.

[0078] Example 5

[0079] The only difference between this embodiment and Embodiment 1 is that the amount of silane-modified resin used is 80 parts.

[0080] Example 6

[0081] The only difference between this embodiment and Embodiment 1 is that the amount of silane-modified resin used is 120 parts.

[0082] Comparative Example 1

[0083] The only difference between this comparative example and Example 1 is that the silane-modified resin prepared in Example 1 is replaced with an equal amount of the silane-modified resin prepared in Comparative Example 1.

[0084] Comparative Example 2

[0085] The only difference between this comparative example and Example 1 is that the silane-modified resin prepared in Example 1 is replaced with an equal amount of the silane-modified resin prepared in Comparative Example 2.

[0086] Comparative Example 3

[0087] The only difference between this comparative example and Example 1 is that the silane-modified resin prepared in Example 1 is replaced with an equal amount of the silane-modified resin prepared in Comparative Example 3.

[0088] Comparative Example 4

[0089] The only difference between this comparative example and Example 1 is that the amount of silane-modified resin used is 50 parts.

[0090] Comparative Example 5

[0091] The only difference between this comparative example and Example 1 is that the amount of silane-modified resin used is 130 parts.

[0092] The performance of the two-component sealing and water-blocking adhesives provided in the examples and comparative examples was tested using the following methods:

[0093] (1) Shear strength: tested according to GB / T 7124-2008;

[0094] (2) Tensile strength: tested according to GB / T528;

[0095] (3) Water resistance value: Tested according to GB / T 26253-2010.

[0096] Among them, PCT48 h accelerated aging refers to aging for 48 hours at 121℃ and 100% humidity.

[0097] The performance test results are shown in Table 1.

[0098] Table 1

[0099]

[0100]

[0101] As shown in Table 1, the two-component water-blocking sealant for photovoltaic modules provided in this embodiment of the invention exhibits excellent adhesion to the backsheet film and aluminum alloy frame of the designed application (shear strength after 7 days @ 25℃: 1.86-3.98MPa; shear strength after PCT 48 h accelerated aging: 1.62-3.09MPa). Simultaneously, the product itself possesses excellent water-blocking performance (water-blocking value after 7 days @ 25℃: 1.76-5.56g / (m³)). 2 Water resistance value after PCT 48 h accelerated aging (day): 1.50-5.09 g / (m²) 2The two-component water-blocking adhesive can ensure good substitutability for the old "butyl tape + silicone" system; at the same time, after high temperature and high humidity aging test, the photovoltaic module can still maintain high performance, ensuring that the module remains reliable after long-term use.

[0102] Compared to Example 1, the two-component sealing and water-blocking adhesives provided in Comparative Examples 1-5 all showed a decrease in adhesion and water-blocking performance.

[0103] The applicant declares that this invention illustrates the two-component sealing water-blocking adhesive, its preparation method, and its application through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of the raw materials in the product, additions of auxiliary components, and selection of specific methods all fall within the protection and disclosure scope of this invention.

Claims

1. A two-component sealing and water-blocking adhesive, characterized in that, The two-component sealing and water-blocking adhesive includes component A and component B. Component A, by weight, comprises the following components: 60-120 parts of silane-modified resin 60-200 parts of filler 2-40 parts of curing agent Anti-aging additive: 0.5-3.5 parts Thixotropic agent 0.1-5 parts; The silane-modified resin was prepared by the following method: The second polyol is evacuated at 100-140℃, then cooled to 60-90℃ under vacuum conditions, the vacuum is removed, and then silane and the second catalyst are added to react and obtain the silane-modified resin. The second polyol is any one or a combination of at least two of castor oil derivative polyols, soybean oil polyols, palm oil polyols, rosin ester polyols, or polyolefin polyols; The silane is 3-isocyanopropyltrimethoxysilane and / or 3-isocyanopropyltriethoxysilane; The mass ratio of the second polyol to silane is (1-9):1; Component B, by weight, comprises the following components: 60-120 parts of the first polyol 60-300 parts of filler 0.1-2 parts of the first catalyst Thixotropic agent 0.1-5 parts.

2. The two-component sealing and water-blocking adhesive according to claim 1, characterized in that, The second catalyst comprises any one or a combination of at least two of the following: stannous octoate, dibutyltin dilaurate, bismuth isooctanoate, tetrabutyl titanate, dimethylethanolamine, triethylenediamine, N-methylmorpholine, or N-ethylmorpholine.

3. The two-component sealing and water-blocking adhesive according to claim 1, characterized in that, The reaction temperature is 60-80℃, and the reaction time is 4-6 hours.

4. The two-component sealing and water-blocking adhesive according to claim 1, characterized in that, The fillers in components A and B each independently include any one or a combination of at least two of the following: zinc oxide, aluminum hydroxide, magnesium oxide, magnesium hydroxide, silica powder, fumed silica, titanium dioxide, heavy calcium carbonate, precipitated barium sulfate, zinc borate, or wollastonite.

5. The two-component sealing and water-blocking adhesive according to claim 1, characterized in that, The curing agent includes any one or a combination of at least two of the following: hexamethylene diisocyanate, hexamethylene diisocyanate trimer, toluene diisocyanate, toluene diisocyanate trimer, diphenylmethane diisocyanate, diphenylmethane diisocyanate trimer, isoflurane diisocyanate, isoflurane diisocyanate trimer, dicyclohexylmethane-4,4'-diisocyanate, dicyclohexylmethane-4,4'-diisocyanate trimer, phenylmethylene diisocyanate, phenylmethylene diisocyanate trimer, tetramethyl isophthalimethylene diisocyanate, or tetramethyl isophthalimethylene diisocyanate trimer.

6. The two-component sealing and water-blocking adhesive according to claim 1, characterized in that, The anti-aging additives include any one or a combination of at least two of the following: UV absorber UV571, light stabilizer 292, anti-aging additive 1010, hydrolytic stabilizer carbodiimide, 4-isopropyldiphenylcarbodiimide, glycidyl ether epoxy compounds, or bisphenol A glycidyl ether.

7. The two-component sealing and water-blocking adhesive according to claim 1, characterized in that, The thixotropic agents in components A and B each independently include any one or a combination of at least two of the following: fumed silica, carbon black, organobentonite, alumina, attapulgite, or fluorinated graphene.

8. The two-component sealing and water-blocking adhesive according to claim 1, characterized in that, The first polyol includes any one or a combination of at least two of the following: castor oil, castor oil derivative polyol, soybean oil polyol, palm oil polyol, rosin ester polyol, polyolefin polyol, or 1,2-propanediol.

9. The two-component sealing and water-blocking adhesive according to claim 1, characterized in that, The first catalyst comprises any one or a combination of at least two of the following: stannous octoate, dibutyltin dilaurate, bismuth isooctanoate, tetrabutyl titanate, dimethylethanolamine, triethylenediamine, N-methylmorpholine, or N-ethylmorpholine.

10. A method for preparing a two-component sealing and water-blocking adhesive as described in any one of claims 1-9, characterized in that, The preparation method includes the following steps: (1) Add silane-modified resin, filler and thixotropic agent into planetary mixer, disperse until there are no obvious particles and the paste is uniform, heat up, stir, vacuum, dehydrate; then cool down, add curing agent and anti-aging agent under nitrogen protection, continue stirring to obtain component A; (2) The first polyol, filler and thixotropic agent are added into a planetary mixer and dispersed until there are no obvious particles and the paste is uniform. Then the temperature is raised, stirred and dehydrated. Then the temperature is lowered and the first catalyst is gradually added under nitrogen protection. Stirring is continued to obtain the B component. (3) Mix component A and component B to obtain the two-component sealing water-blocking adhesive.

11. The preparation method according to claim 10, characterized in that, The heating in step (1) is to raise the temperature to 50~100℃.

12. The preparation method according to claim 10, characterized in that, The stirring speed in step (1) is 200~600 rpm.

13. The preparation method according to claim 10, characterized in that, The vacuuming in step (1) is performed at a pressure of <-0.09 MPa.

14. The preparation method according to claim 10, characterized in that, The dehydration time in step (1) is 1 to 3 hours.

15. The preparation method according to claim 10, characterized in that, The cooling in step (1) is to cool down to 50~60℃.

16. The preparation method according to claim 10, characterized in that, The heating in step (2) is to raise the temperature to 50~100℃.

17. The preparation method according to claim 10, characterized in that, The stirring speed in step (2) is 300~500 rpm.

18. The preparation method according to claim 10, characterized in that, The dehydration time in step (2) is 2-3 hours.

19. The preparation method according to claim 10, characterized in that, The cooling in step (2) is to cool down to 50~60℃.

20. The application of a two-component sealing and water-blocking adhesive as described in any one of claims 1-9 in a photovoltaic module.

21. The application according to claim 20, characterized in that, The two-component sealing and water-blocking adhesive is used for sealing component frame edges, bonding junction boxes, potting junction boxes, or repairing and bonding back panels.

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