Single-component modified silane adhesive as well as preparation method and application thereof

Abstract

The invention provides a single-component modified silane adhesive as well as a preparation method and application thereof. The adhesive is prepared by mixing the following components: silane modified polyether resin, silane modified polymer resin, a plasticizer, a composite light stabilizer, a filler, a rheological additive, a water removal agent, a coupling agent and a catalyst, the silane modified polyether resin is silane-terminated resin prepared by a hydrosilylation method; the silane-modified polymer resin is a silane-terminated polymer resin containing a urethane bond. The adhesive is excellent in comprehensive performance, the tensile strength of a body is larger than 3 MPa, the elongation at break is larger than 450%, the adhesive is high in adhesion universality to metal base materials, PET films, ceramics, glass, wood floors, PVC, PC, ABS, wood-plastic composite materials and paint faces, the base materials do not need to be specially treated, the damage form is cohesive failure, and the adhesive has good adhesion strength, tear resistance and excellent temperature resistance and is suitable for being applied to the field of wood products. After aging at 120 DEG C for one week, the tensile strength of the body is greater than 3 MPa, the elongation at break is greater than 430%, and the surface layer can be coated after curing.

Description

Technical Field

[0001] This invention relates to the field of adhesive technology, specifically to a one-component modified silane adhesive, its preparation method, and its application. Background Technology

[0002] With continuous social progress and development, the application fields of adhesives are constantly expanding. Along with the development of lightweighting, various applications replacing welding with adhesives have emerged. The demand for low-energy substrate sealing and bonding is also increasing. At the same time, in addition to requiring adhesives to have good adhesion to a wide range of substrates, special fields such as vehicle bodies and doors and windows also require painting operations on the cured adhesive surface to ensure excellent paint adhesion. Therefore, adhesives need to have strong universality of bonding to the substrates without pretreatment, and also need to have good paintability after curing to meet the dual needs of bonding and being bonded.

[0003] Epoxy resin adhesives are widely used in structural bonding due to their excellent bonding strength. However, after curing, they have high internal stress, are prone to brittleness and cracking, have low elongation at break, and poor impact resistance. Furthermore, the amines and other curing agents used in epoxy resin adhesives give them a certain odor. Polyurethane hot melt adhesives require a specialized hot melt adhesive applicator to melt the adhesive at high temperatures, and application also requires professional operation, making the application process more complex.

[0004] Polyurethane adhesives, by controlling the ratio and structure of soft and hard segments in the molecular chain, can achieve good flexibility and avoid the drawbacks of high curing stress and brittleness, thus gaining widespread application. Single-component polyurethane sealants have poor universal adhesion to substrates. For some low surface energy metals or plastics, solvent-based activators or primers are often required, or expensive and complex plasma treatments are needed to achieve good adhesion. This causes inconvenience in actual production and also contributes to environmental pollution. Two-component polyurethane adhesives have strong cohesion, but their elongation at break is often below 200%, limiting their application in areas requiring elastic bonding and sealing. Furthermore, due to their inherent structure, the -NCO groups in polyurethane adhesives readily react with moisture in the air, generating CO2 during curing, leading to bubbles and surface blistering. Moisture or humid weather severely affects the operability and bonding reliability of the product.

[0005] Silicone adhesives offer good weather resistance and substrate compatibility, but traditional silicone sealants can leach silicone oil, causing contaminants to adhere to them, especially on porous materials, resulting in stubborn pollution. During curing, they release small molecules such as acetic acid or ethanol, producing a strong odor and corroding some substrates. Furthermore, the surface cannot be coated.

[0006] Silane-modified polyurethane or polyether materials combine the advantages of both polyurethane and silicone, and are increasingly being used in bonding and sealing in various fields. However, for some specialized applications, it is difficult to simultaneously meet the dual requirements of bonding to low-energy surfaces and paint adhesion; applications in specialized engineering fields also require meeting high-temperature requirements of 120°C. Summary of the Invention

[0007] In view of this, the present invention proposes a single-component modified silane adhesive, its preparation method and application. This adhesive not only has excellent bonding strength to a wide range of untreated low-energy surface substrates, but also has good elongation at break and aging resistance, and can withstand high temperatures of 120°C after curing; it also has good paintability to meet the requirements of paint adhesion.

[0008] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: In a first aspect, the present invention provides a single-component modified silane adhesive prepared by mixing the following components, each component including: silane-modified polyether resin, silane-modified polymer resin, plasticizer, composite light stabilizer, filler, rheology modifier, dehydrating agent, coupling agent and catalyst; The silane-modified polyether resin is a silane-terminated resin prepared by hydrosilylation; the silane-modified polymer resin is a silane-terminated polymer resin containing urethane bonds.

[0009] Furthermore, the single-component modified silane adhesive component comprises the following raw materials in parts by weight: 18-35 parts of silane-modified polyether resin; 0.5-10 parts of silane-modified polymer resin; Plasticizer 8-20 parts; 0.5-1.5 parts of composite light stabilizer; 40-60 parts of filler; 0.5~2.0 parts of rheology modifier; 0.5-5 parts of dehydrating agent; 0.5 to 2.5 parts of coupling agent; Catalyst 0.01~0.4 parts.

[0010] Furthermore, the silane in the silane-modified polymer resin and the silane-modified polyether resin are selected from one or more of dimethoxy, diethoxy, trimethoxy-terminated or triethoxy. The viscosity of both the silane-modified polyether resin and the silane-modified polymer resin is 5000~60000 mPa*s.

[0011] Furthermore, the plasticizer is one or more of the following: water-insoluble halogen-free nitrogen and phosphorus plasticizers, alkyl sulfonate plasticizers, phthalates, aliphatic diacids, and polymeric polyols.

[0012] Furthermore, the rheology modifier is at least one of hydrophobic fumed silica, polyamide wax, modified urea oligomer, bentonite, and hydrogenated castor oil.

[0013] Furthermore, the composite light stabilizer is selected as a mixture of ultraviolet absorbers with light-stabilizing effects, hindered amine light stabilizers, and antioxidants.

[0014] Furthermore, the filler is at least one selected from calcium carbonate, aluminum hydroxide, magnesium hydroxide, aluminum oxide, aluminum nitride, magnesium oxide, titanium dioxide, silica powder, kaolin, montmorillonite, halloysite, mica powder, barite powder, talc powder, and carbon black.

[0015] Furthermore, the dehydrating agent is at least one of 4-methylbenzenesulfonyl isocyanate, vinylsilane, activated molecular sieve, and 1,3-oxazine cyclopentane compounds; The vinylsilane is at least one of vinyltrimethoxysilane, vinyltriethoxysilane, and vinyltri(methoxyethoxy)silane; The coupling agent is at least one of an amine-containing coupling agent and an epoxy-containing coupling agent; The catalyst is an organotin catalyst.

[0016] In a second aspect, the present invention also provides a method for preparing a single-component modified silane adhesive as described in the first aspect, comprising the following steps: Mix silane-modified polyether resin, silane-modified polymer resin, plasticizer, composite light stabilizer, filler, and rheology modifier, and stir under vacuum at 100~120℃ for 1.5~3h. Cool down to below 40℃, add dehydrating agent and coupling agent, and continue vacuum stirring for 10~20 minutes; Add the catalyst and stir under vacuum for 10-20 minutes to obtain a single-component modified silane adhesive.

[0017] In a second aspect, the present invention also provides the application of the single-component modified silane adhesive as described in the first aspect in adhesive sealing materials, wherein the adhesive sealing materials include metal substrates, PET films, ceramics, glass, wood flooring, PVC, PC, ABS, and wood-plastic composite materials.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: The adhesive prepared by this invention exhibits a tensile strength greater than 3 MPa and an elongation at break greater than 450% after curing. It demonstrates strong aging resistance; after aging at 120°C for one week, the tensile strength remains greater than 3 MPa and the elongation at break exceeds 430%. It exhibits broad adhesion to substrates, showing excellent bonding to untreated metal substrates such as aluminum alloys, PET films, galvanized sheets, stainless steel, fiberglass, and ABS. Furthermore, it possesses strong paintability after curing, readily adhering to polyurethane paints, epoxy resin paints, acrylic paints, and other types; the cross-cut adhesion test achieves a paint adhesion rating of 0. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of protection of the present invention.

[0020] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] This invention provides a one-component modified silane adhesive, prepared by mixing the following components, each component including: silane-modified polyether resin, silane-modified polymer resin, plasticizer, composite light stabilizer, filler, rheology modifier, dehydrating agent, coupling agent, and catalyst; wherein, the silane-modified polyether resin is a silane-terminated resin prepared by hydrosilylation; and the silane-modified polymer resin is a silane-terminated polymer resin containing urethane bonds.

[0023] Specifically, the single-component modified silane adhesive component comprises the following raw materials in parts by weight: 18-35 parts of silane-modified polyether resin; 0.5-10 parts of silane-modified polymer resin; Plasticizer 8-20 parts; 0.5-1.5 parts of composite light stabilizer; 40-60 parts of filler; 0.5~2.0 parts of rheology modifier; 0.5-5 parts of dehydrating agent; 0.5 to 2.5 parts of coupling agent; Catalyst 0.01~0.4 parts.

[0024] The preparation process includes the following steps: Take 18-35 parts by weight of silane-modified polyether resin, 0.5-10 parts of silane-modified polymer resin, 8-20 parts of plasticizer, 0.5-1.5 parts of composite light stabilizer, 40-60 parts of filler, and 0.5-2.0 parts of rheology modifier, and stir under vacuum at 100-120℃ for 1.5-3 hours. Then cool down to below 40℃, add 0.5-5 parts of dehydrating agent and 0.5-2.5 parts of coupling agent, and continue to stir under vacuum for 10-20 minutes. Finally, add 0.01-0.4 parts of catalyst and stir under vacuum for 10-20 minutes to obtain the adhesive.

[0025] In an optional embodiment, the silane in the silane-modified polymer resin and the silane-modified polyether resin is selected from one or more of dimethoxy, diethoxy, trimethoxy-terminated or triethoxy. The viscosity of both the silane-modified polyether resin and the silane-modified polymer resin is 5000~60000 mPa*s.

[0026] In optional embodiments, the plasticizer is one or more of the following: water-insoluble halogen-free nitrogen and phosphorus plasticizers, alkyl sulfonate plasticizers, phthalates, aliphatic diacids, and polymeric polyols.

[0027] In an optional embodiment, the rheology modifier is at least one of hydrophobic fumed silica, polyamide wax, modified urea oligomer, bentonite, and hydrogenated castor oil.

[0028] In an optional embodiment, the composite light stabilizer is selected as a mixture of ultraviolet absorbers with light-stabilizing effects, hindered amine light stabilizers, and antioxidants.

[0029] In an optional embodiment, the filler is at least one selected from calcium carbonate, aluminum hydroxide, magnesium hydroxide, aluminum oxide, aluminum nitride, magnesium oxide, titanium dioxide, silica powder, kaolin, montmorillonite, halloysite, mica powder, barite powder, talc powder, and carbon black.

[0030] In an optional embodiment, the dehydrating agent is at least one of 4-methylbenzenesulfonyl isocyanate, vinylsilane, activated molecular sieve, and 1,3-oxazine cyclopentane compounds; The vinylsilane is at least one of vinyltrimethoxysilane, vinyltriethoxysilane, and vinyltri(methoxyethoxy)silane; The coupling agent is at least one of an amine-containing coupling agent and an epoxy-containing coupling agent; The catalyst is an organotin catalyst.

[0031] The adhesive prepared by this invention is made by mixing specific materials in a certain proportion, wherein, Key experimental material sources and physicochemical parameters: Silane-modified polyether resins: SAX750, SAX575, SAX400, S303H, SAX350, and SAX530 produced by Kaneka Corporation of Japan; TUPS 400 and TUPS303T produced by Jiangsu Ruiyang Antai Company; and TSINGO310S, TSINGO410S, TSINGO258E, and TSINGO310E produced by Nanjing Qingqi Company.

[0032] Silane-modified polymer resins: Link-shine 7200, Link-shine 1800, Link-shine 1800HT, Link-shine 2400, and Link-shine 2400HT produced by Shandong Lingxiao Company; and KERILON® 350D, KERILON® 120K, and RISUN 12000DS produced by Jiangsu Ruiyang Antai Company.

[0033] Polymer polyols: Cashew nut shell oil modified polyols NX-9203, NX-9207, NX-9208, NX-9212, and NX-9008 produced by Guangdong Cardley Chemical Co., Ltd.; DA20, DA21, DA2026, and DA3190 produced by Shanghai Jingri Co., Ltd.; and hydrolysis-resistant polycaprolactone polyols PCL-2200A and PCL-2200C produced by Hunan Juren Co., Ltd.

[0034] Plasticizers: Mesamoll alkyl sulfonate produced by Lanxess GmbH, Germany; resorcinol bis(diphenyl phosphate) produced by Zhejiang Wansheng Co., Ltd.; modified phosphate plasticizer HY101 produced by Hangzhou Hongyi Zhichuang Technology Co., Ltd.; diisononyl phthalate; and diisodecyl phthalate.

[0035] Rheology modifiers: AEROSIL R202 from Evonik and CAB-O-SIL from Cabot Corporation. ® TS530, CAB-O-SIL ® TS720, HDK manufactured by Wacker Chemie ® H17, HDK ® H18, HDK® H20, Crayvallac SLT, Crayvallac Optima, and Crayvallac LV manufactured by Arkema (France), HB-615, HB-620, and HB-630 manufactured by Hubei Huifu Company, and D680 manufactured by Guangzhou Core Chemical.

[0036] Filler: SP200 produced by Shanxi Lanhua Huaming Company, and modified calcium carbonate Omyabond produced by Omyabond Company of Switzerland. ® 520、Omyabond ® 120. Omyabond ® 160. Calcium carbonate CCS-25, CCR-4, and CCS-27 produced by Guangxi Huana Company; XTCC-201 produced by Shanxi Xintai Hengxin Company; and NOVOPOWDER DB and NOVOPOWDER DQ silicon micropowder produced by Jiangsu Lianrui Company.

[0037] Unless otherwise specified, all raw materials used in this invention are existing substances that can be purchased directly from the market.

[0038] The following is a further description with reference to specific embodiments: Example 1 This embodiment provides a one-component modified silane adhesive, the raw materials and steps of which are as follows: Table 1. Composition of Adhesive A

[0039] Add silane-modified polyether resin, silane-modified polymer resin, plasticizer, composite light stabilizer, filler, and rheology modifier to a dynamic mixer, and vacuum stir at 100~120℃ for 1.5~3h. Then cool down to below 40℃, add dehydrating agent and coupling agent, continue vacuum stirring for 15min, and finally add catalyst and vacuum stir for 15min to obtain adhesive A.

[0040] Example 2 This embodiment provides a single-component modified silane adhesive, the principle and steps of which are basically the same as those in Example 1, the difference being in the selection of materials and the proportion of materials, as shown in Table 2 below.

[0041] Table 2 Composition of Adhesive B

[0042] Example 3 This embodiment provides a single-component modified silane adhesive, the principle and steps of which are basically the same as those in Example 1, the difference being in the selection of materials and the proportion of materials, as shown in Table 3 below.

[0043] Table 3. Composition of Adhesive C

[0044] Example 4 This embodiment provides a single-component modified silane adhesive, the principle and steps of which are basically the same as those in Example 1, the difference being in the selection of materials and the proportion of materials, as shown in Table 4 below.

[0045] Table 4 Composition of Adhesive A

[0046] Example 5 This embodiment provides a single-component modified silane adhesive, the principle and steps of which are basically the same as those in Example 1, the difference being in the selection of materials and the proportion of materials, as shown in Table 5 below.

[0047] Table 5. Composition of Adhesive E

[0048] Example 6 This embodiment provides a single-component modified silane adhesive, the principle and steps of which are basically the same as those in Example 1, the difference being in the selection of materials and the proportion of materials, as shown in Table 6 below.

[0049] Table 6. Composition of Adhesive F

[0050] Example 7 This embodiment provides a single-component modified silane adhesive, the principle and steps of which are basically the same as those in Example 1, the difference being in the selection of materials and the proportion of materials, as shown in Table 7 below.

[0051] Table 7 Composition of Adhesive G

[0052] Comparative Example 1 This comparative example provides a one-component modified silane adhesive, whose composition is basically the same as that of Example 1, except that: silane-modified polyether resin is not used, and all silane-modified polyether resin is replaced by commercially available KERILON® 350D, with a replacement amount of 28 parts.

[0053] Comparative Example 2 This comparative experiment provides a single-component modified silane adhesive, whose composition is basically the same as that of Example 2, except that the plasticizer is completely replaced by polyether polyol DL4000, and the replacement amount is 12 parts.

[0054] Comparative Example 3 This comparative experiment provides a one-component modified silane adhesive, whose composition is basically the same as that of Example 3, except that: the silane-modified polyether resin used is all commercially available Link-shine 7200, with a substitution amount of 25.41 parts. The plasticizer is replaced with polyether polyol DL2000, with a substitution amount of 10 parts.

[0055] Comparative Example 4 This comparative experiment provides a one-component modified silane adhesive, whose composition is basically the same as that of Example 4, except that: the silane-modified polymer resin is entirely replaced by commercially available TSINGO310S, with a substitution amount of 6 parts. The plasticizer is replaced by polyether polyol DL4000, with a substitution amount of 13 parts.

[0056] Comparative Example 5 This comparative experiment provides a single-component modified silane adhesive, which has basically the same raw material composition as that of Example 1, except that: the silane-modified polyether resin is SAX750, with an amount of 5 parts; the silane-modified polymer resin is KERILON® 350D, with an amount of 28 parts; and the plasticizer is replaced by hydrophilic polyether polyol polyethylene glycol DL4000.

[0057] Performance testing To further verify the performance of the products prepared in each embodiment and comparative example, the following tests were performed on them: Appearance: The test was conducted in accordance with GB / T 9761, and the uniformity of the color of the sample was observed under natural sunlight illumination.

[0058] Surface drying time test: Under constant temperature and humidity conditions (temperature 23±2℃, humidity 50±5%), the prepared adhesive is conditioned for at least 12 hours. The adhesive is then evenly spread to a thickness of about 2mm. The surface of the adhesive is lightly touched with the hand, and the time it takes for no adhesive residue to be left on the finger is measured.

[0059] Tensile strength and elongation at break tests: conducted in accordance with GB / T 528.

[0060] Shear strength test: Refer to GB / T 7124 for the test method of tensile shear strength. All substrates are not treated before bonding.

[0061] Heat aging resistance: The colloid was prepared into a 2 mm thick sheet and cured for two weeks in a constant temperature and humidity environment (temperature 23±2℃, humidity 50±5%). After being placed in a forced-air drying oven at 120±2℃ for 7 days, the bulk tensile properties and elongation at break of the colloid were tested.

[0062] Paint adhesion performance: The colloid was prepared into a 2 mm thick sheet and cured for one week in a constant temperature and humidity environment (temperature 23±2℃, humidity 50±5%). A layer of paint with a thickness of approximately 50-100 μm was then coated on the surface of the sheet. After the paint cured for one week in a standard environment, the paint adhesion level was tested using a cross-cut adhesion tester according to GB / T 9286. In a specific embodiment, the paints selected were as follows: the polyurethane paint was Sigmadur 550 produced by PPG Industries; the modified acrylic paint and fluorocarbon paint were UNYMARINE HS and EVAWIN FL produced by Zhongtu Chemical Co., Ltd., respectively; and the epoxy paint was EP166 produced by Zhongshan Bridge Chemical Co., Ltd.

[0063] T-peel test: The T-peel strength of aluminum material is tested according to GB / T 2791 (the aluminum material is not treated).

[0064] Tear strength test: The bulk tear strength of the cured colloid is tested according to GB / T 529.

[0065] Table 8. Performance data of adhesives prepared in Examples 1-7 and Comparative Examples 1-5

[0066] Continued from Table 8

[0067] Note: The failure modes in the table are: (1) cohesive failure of CF adhesive, (2) adhesive failure of AF, and (3) mixed adhesion and cohesive failure of ACFP peeling mode.

[0068] As shown in Table 8, adhesives with different surface drying times of 10-30 minutes can be prepared by combining raw materials in a specific ratio, which can meet the process requirements of specific application scenarios.

[0069] Compared with Comparative Examples 1, 3, and 5, the adhesives prepared in Examples 1-7 exhibited a bulk tensile strength greater than 3 MPa and an elongation at break greater than 450%. By employing a silane-modified polyether resin via a hydrosilylation route, higher-energy Si-O-Si bonds were introduced, improving the heat resistance of the molecular structure. After aging at 120°C for 7 days, the tensile strength was greater than 3 MPa, and the elongation at break was greater than 430%. Furthermore, the bonding failure mode of the substrates after aging was cohesive failure.

[0070] Compared to Comparative Example 4, the adhesives prepared in Examples 1-7, due to the addition of a specific proportion of silane-modified polymer resin with urethane bonds, increased the polarity of the system, resulting in a significant improvement in adhesion to different paints. Compared to Comparative Example 5, by controlling the specific addition ratio, the heat resistance of the cured adhesive was not affected. Furthermore, it exhibited good tear resistance and T-peel properties.

[0071] The adhesives prepared in Comparative Examples 2, 3, 4, and 5 used hydrophilic polyether polyols as plasticizers, which reduced the polarity of the system, resulting in a significant decrease in paint adhesion and substrate bonding.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A one-component modified silane adhesive, characterized in that, It is prepared by mixing the following components, each component including: silane-modified polyether resin, silane-modified polymer resin, plasticizer, composite light stabilizer, filler, rheology modifier, dehydrating agent, coupling agent and catalyst; The silane-modified polyether resin is a silane-terminated resin prepared by hydrosilylation; the silane-modified polymer resin is a silane-terminated polymer resin containing urethane bonds.

2. The single-component modified silane adhesive according to claim 1, characterized in that, The single-component modified silane adhesive component comprises the following raw materials in parts by weight: 18-35 parts of silane-modified polyether resin; 0.5-10 parts of silane-modified polymer resin; Plasticizer 8-20 parts; 0.5-1.5 parts of composite light stabilizer; 40-60 parts of filler; 0.5~2.0 parts of rheology modifier; 0.5-5 parts of dehydrating agent; 0.5 to 2.5 parts of coupling agent; Catalyst 0.01~0.4 parts.

3. The single-component modified silane adhesive according to claim 2, characterized in that, The silane in the silane-modified polymer resin and the silane-modified polyether resin are both selected from one or more of dimethoxy, diethoxy, trimethoxy-terminated or triethoxy. The viscosity of both the silane-modified polyether resin and the silane-modified polymer resin is 5000~60000 mPa*s.

4. The single-component modified silane adhesive according to claim 1, characterized in that, The plasticizer is one or more of the following: water-insoluble halogen-free nitrogen and phosphorus plasticizers, alkyl sulfonate plasticizers, phthalates, aliphatic diacids, and polymeric polyols.

5. The single-component modified silane adhesive according to claim 1, characterized in that, The rheology modifier is at least one of hydrophobic fumed silica, polyamide wax, modified urea oligomer, bentonite, and hydrogenated castor oil.

6. The single-component modified silane adhesive according to claim 1, characterized in that, The composite light stabilizer is a mixture of ultraviolet absorbers, hindered amine light stabilizers, and antioxidants that contain light-stabilizing properties.

7. The single-component modified silane adhesive according to claim 1, characterized in that, The filler is at least one of calcium carbonate, aluminum hydroxide, magnesium hydroxide, aluminum oxide, aluminum nitride, magnesium oxide, titanium dioxide, silica powder, kaolin, montmorillonite, halloysite, mica powder, barite powder, talc powder, and carbon black.

8. The single-component modified silane adhesive according to claim 1, characterized in that, The dehydrating agent is at least one of 4-methylbenzenesulfonyl isocyanate, vinylsilane, activated molecular sieve, and 1,3-oxazolidinyl pentane compounds. The vinylsilane is at least one of vinyltrimethoxysilane, vinyltriethoxysilane, and vinyltri(methoxyethoxy)silane; The coupling agent is at least one of an amine-containing coupling agent and an epoxy-containing coupling agent; The catalyst is an organotin catalyst.

9. A method for preparing the single-component modified silane adhesive according to any one of claims 1-8, characterized in that, Includes the following steps: Mix silane-modified polyether resin, silane-modified polymer resin, plasticizer, composite light stabilizer, filler, and rheology modifier, and stir under vacuum at 100~120℃ for 1.5~3h. Cool down to below 40℃, add dehydrating agent and coupling agent, and continue vacuum stirring for 10~20 minutes; Add the catalyst and stir under vacuum for 10-20 minutes to obtain a single-component modified silane adhesive.

10. The application of the single-component modified silane adhesive according to any one of claims 1-8 in adhesive sealing materials, characterized in that, The adhesive sealing materials include metal substrates, PET films, ceramics, glass, wood flooring, PVC, PC, ABS, and wood-plastic composites.

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