A kind of dealcohol-type silicone sealant with rapid initial curing and preparation method thereof
By using a combination of metal-organic framework MIL-101 modified CaCO3 and alkoxy-terminated polydimethylsiloxane, the problem of slow initial curing speed of traditional dealcoholized silicone sealants is solved, and the effects of rapid curing and high mechanical strength are achieved to meet the needs of fast construction.
Patent Information
- Application Number
- CN202411363105.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2044-09-27
AI Technical Summary
Traditional dealcoholized silicone sealants have a slow initial curing speed and cannot meet the needs of rapid construction, especially in applications where doors and windows must be turned over within 6 hours after gluing or photovoltaic modules must be squeezed within 6 hours after gluing.
The metal organic framework MIL-101 is used to modify CaCO3, combined with alkoxy-terminated polydimethylsiloxane to increase the migration rate of water vapor inside the filler, and through the combination of specific proportions and catalysts, rapid cross-linking and curing are achieved.
At 25°C and 30% relative humidity, the diffusion coefficient of water vapor in the filler increases by 3600%, the curing depth reaches more than 1mm after 6 hours, and the curing depth reaches more than 3.5mm after 24 hours, which significantly improves the initial curing speed while maintaining high mechanical strength.
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Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of sealants, and in particular to a dealcoholized silicone sealant with rapid initial curing and a preparation method thereof. Background Art
[0002] Dealcoholized silicone sealants have excellent adhesion to substrates such as glass, stone, plastic, and metal, and are non-corrosive to metal substrates. Consequently, they are widely used in areas such as door and window waterproofing, curtain wall weatherproofing, and electronic and electrical sealing. With the continuous advancement of technology throughout the supply chain, the demand for construction speed is increasing. The next process must begin 6 to 8 hours after gluing. For example, doors and windows must be turned over within 6 hours after gluing, photovoltaic panels must be extruded within 6 hours after gluing, and aluminum curtain walls will experience significant displacement within 8 hours of gluing. These changes in application scenarios place higher demands on the sealant's initial curing speed.
[0003] Dealcoholized silicone sealants require water vapor in the air to react and crosslink to form a three-dimensional network structure, providing sealing performance. After the surface of traditional dealcoholized silicone sealants cure, the rate at which water vapor penetrates the inner layer of the sealant decreases dramatically, resulting in a slow deep-drying cure rate for the dealcoholized silicone sealant, often requiring 24 hours to achieve the desired cure for the application. Summary of the Invention
[0004] Based on this, it is necessary to provide a dealcoholized silicone sealant with a faster initial curing speed and higher mechanical strength.
[0005] A method for preparing a dealcoholized silicone sealant with rapid initial curing comprises the following steps:
[0006] The metal organic framework MIL-101, silane coupling agent and calcium carbonate are dispersed in an organic solvent, and then the temperature is raised to 140-160°C and reacted for 5-7 hours to obtain MIL-101@CaCO3;
[0007] According to parts by mass, 100 parts of α,ω-dihydroxy polydimethylsiloxane, 20 to 30 parts of alkoxy-terminated polydimethylsiloxane, 100 to 120 parts of MIL-101@CaCO3, 15 to 30 parts of a cross-linking agent, 2 to 8 parts of a coupling agent, and 0.1 to 1 part of a catalyst are mixed and dispersed to obtain the dealcoholized silicone sealant.
[0008] In one embodiment, the mass ratio of MIL-101, silane coupling agent and calcium carbonate is 4:0.5-1.5:4-6. Preferably, the mass ratio of the three is 4:1:6.
[0009] In one embodiment, the alkoxy-terminated polydimethylsiloxane is selected from one or more of methoxy-terminated polydimethylsiloxane and ethoxy-terminated polydimethylsiloxane.
[0010] In one embodiment, the viscosity of the α,ω-dihydroxy polydimethylsiloxane is 2000-20000 cps, and the viscosity of the alkoxy-terminated polydimethylsiloxane is 100-350 cps.
[0011] In one embodiment, the preparation method of MIL-101 includes the following steps: dissolving 10 parts by mass of chromium nitrate and 4 parts by mass of terephthalic acid in water, adding 6 parts of hydrofluoric acid, heating to 210-230 degrees and reacting for 7-9 hours to obtain MIL-101.
[0012] In one embodiment, the D50 of the calcium carbonate is 100-200 nm and the specific surface area is 22-25 m 2 / g.
[0013] In one embodiment, the crosslinking agent is selected from one or more of methyltrimethoxysilane, vinyltrimethoxysilane, phenyltrimethoxysilane and vinyltriethoxysilane.
[0014] In one embodiment, the coupling agent is selected from one or more of γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-(-β-aminoethyl)-γ-aminopropyltriethoxysilane, γ-glycidyl ether propyltrimethoxysilane, γ-glycidyl ether propyltriethoxysilane, epoxycyclohexyltrimethoxysilane, epoxycyclohexyltriethoxysilane, mercaptopropyltrimethoxysilane, mercaptopropyltriethoxysilane, isocyanatetrimethoxysilane and isocyanatetriethoxysilane.
[0015] In one embodiment, the catalyst is selected from one or more of tetraisopropyl titanate, tetrabutyl titanate, diisopropoxybis(ethoxyacetoacetyl) titanium, di-n-butoxybis(ethoxyacetoacetyl) titanium and 1,3-dipropoxybis(ethoxyacetoacetyl) titanium.
[0016] The present invention also provides a dealcoholized silicone sealant with rapid initial curing, which is prepared according to the above preparation method.
[0017] The above solution of the present invention has the following beneficial effects:
[0018] The present invention provides a dealcohol-type silicone sealant with rapid initial curing and a preparation method thereof. The metal organic framework MIL-101 is used to modify CaCO3 to significantly increase the migration rate of water vapor inside the filler. The diffusion coefficient of water vapor in the filler is 0.112 cm at 25°C and 30% relative humidity. 2 / s, an increase of 3600%, while ensuring mechanical strength; on this basis, it is combined with alkoxy-terminated polydimethylsiloxane to further improve the curing rate. The curing depth can reach more than 1mm after 6 hours, and more than 3.5mm after 24 hours, which effectively solves the problem of slow initial curing speed of existing silicone sealants. DETAILED DESCRIPTION
[0019] To make the technical problems, technical solutions, and advantages to be solved by the present invention more clear, the following will be described in detail with reference to specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0020] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Unless otherwise specified, the reagents and instruments used in the examples are all conventionally selected in the art. Experimental methods without specific conditions in the examples were carried out according to conventional conditions, such as those described in the literature, books, or methods recommended by the manufacturer.
[0021] Example 1
[0022] The preparation method of metal organic framework (MOF) modified filler is as follows:
[0023] By mass, 10 parts of chromium nitrate and 4 parts of terephthalic acid are dissolved in deionized water, and 6 parts of hydrofluoric acid are slowly added. While stirring in a hydrothermal reactor, the temperature is uniformly raised to 220 degrees within 1 hour. After constant temperature reaction for 8 hours, the temperature is slowly lowered to room temperature. First wash with nitrogen and nitrogen dimethylformamide, filter and dry, and then wash with anhydrous ethanol. After filtering and drying, a metal organic framework is obtained, which is recorded as MIL-101 (Cr). Take 4 parts of MIL-101 (Cr), 1 part of aminopropyltriethoxysilane and 4 parts of heavy calcium carbonate (D50 is 150nm, specific surface area is 23m 2 / g) was ultrasonically dispersed in ether for 20 minutes, transferred to a hydrothermal reactor and heated uniformly to 150 degrees within 1 hour. After isothermal reaction for 6 hours, the temperature was uniformly lowered to 25 degrees within 8 hours. It was washed with ether and anhydrous ethanol in sequence, filtered and dried to obtain MIL-101(Cr) modified calcium carbonate, recorded as MIL-101@CaCO3. The water vapor adsorption kinetic curve was tested using a water vapor adsorption instrument, and the diffusion coefficient of water vapor in MIL-101@CaCO3 was calculated to be 0.112cm at 25°C and 30% relative humidity. 2 / s.
[0024] 100 parts of 2000cps α,ω-dihydroxypolydimethylsiloxane, 30 parts of 100cps methoxy-terminated polydimethylsiloxane, 120 parts of MIL-101@CaCO3, 30 parts of vinyltrimethoxysilane, 2 parts of N-(-βaminoethyl)-γ-aminopropyltriethoxysilane, and 1 part of 1,3-dipropoxybis(ethoxyacetoacetyl)titanium were added to a planetary mixer and stirred and dispersed under a vacuum degree of -0.095MPa for 40 minutes to obtain a dealcohol-type silicone sealant with initial rapid curing.
[0025] Example 2
[0026] The preparation method of metal organic framework (MOF) modified filler is as follows:
[0027] By mass, 10 parts of chromium nitrate and 4 parts of terephthalic acid are dissolved in deionized water, and 6 parts of hydrofluoric acid are slowly added. While stirring in a hydrothermal reactor, the temperature is uniformly raised to 210 degrees within 1 hour. After constant temperature reaction for 9 hours, the temperature is slowly lowered to room temperature. First wash with nitrogen and nitrogen dimethylformamide, filter and dry, and then wash with anhydrous ethanol. After filtering and drying, a metal organic framework is obtained, which is recorded as MIL-101 (Cr). Take 4 parts of MIL-101 (Cr), 1 part of aminopropyltriethoxysilane and 5 parts of heavy calcium carbonate (D50 is 150nm, specific surface area is 23m 2 / g) was ultrasonically dispersed in diethyl ether for 20 minutes. The mixture was transferred to a hydrothermal reactor and heated uniformly to 160°C over 1 hour. After 5 hours of constant temperature reaction, the temperature was uniformly lowered to 25°C over 8 hours. The mixture was washed sequentially with diethyl ether and anhydrous ethanol, filtered, and dried to obtain MIL-101(Cr)-modified calcium carbonate, designated 4MIL-101@5CaCO3.
[0028] 100 parts of 8000cps α,ω-dihydroxypolydimethylsiloxane, 20 parts of 350cps methoxy-terminated polydimethylsiloxane, 110 parts of MIL-101@CaCO3, 20 parts of vinyltriethoxysilane, 3 parts of N-(-βaminoethyl)-γ-aminopropyltrimethoxysilane, and 1 part of 1,3-dipropoxybis(ethoxyacetoacetyl)titanium were added to a planetary mixer and stirred and dispersed under a vacuum degree of -0.095MPa for 40 minutes to obtain a dealcohol-type silicone sealant with initial rapid curing.
[0029] Example 3
[0030] The preparation method of metal organic framework (MOF) modified filler is as follows:
[0031] By mass, 10 parts of chromium nitrate and 4 parts of terephthalic acid are dissolved in deionized water, and 6 parts of hydrofluoric acid are slowly added. While stirring in a hydrothermal reactor, the temperature is uniformly raised to 230 degrees within 1 hour. After constant temperature reaction for 7 hours, the temperature is slowly lowered to room temperature. First wash with nitrogen and nitrogen dimethylformamide, filter and dry, and then wash with anhydrous ethanol. After filtering and drying, a metal organic framework is obtained, which is recorded as MIL-101 (Cr). Take 4 parts of MIL-101 (Cr), 1 part of aminopropyltriethoxysilane and 6 parts of heavy calcium carbonate (D50 is 200nm, specific surface area is 25m 2 / g) was ultrasonically dispersed in diethyl ether for 20 minutes. The mixture was transferred to a hydrothermal reactor and heated uniformly to 140°C over 1 hour. After 7 hours of constant temperature reaction, the temperature was uniformly lowered to 25°C over 8 hours. The mixture was washed sequentially with diethyl ether and anhydrous ethanol, filtered, and dried to obtain MIL-101(Cr)-modified calcium carbonate, designated 2MIL-101@3CaCO3.
[0032] Add 100 parts of 15000cps α,ω-dihydroxy polydimethylsiloxane, 25 parts of 300cps ethoxy-terminated polydimethylsiloxane, 100 parts of MIL-101@CaCO3, 30 parts of phenyltrimethoxysilane, 8 parts of γ-aminopropyltrimethoxysilane, and 0.2 parts of tetraisopropyl titanate into a planetary mixer, stir and disperse under a vacuum degree of -0.095MPa for 40 minutes to obtain a dealcoholized silicone sealant with initial rapid curing.
[0033] Example 4
[0034] The preparation method of the metal organic framework (MOF) modified filler is the same as that in Example 1 and is recorded as MIL-101@CaCO3.
[0035] Add 100 parts of 20000cps α,ω-dihydroxypolydimethylsiloxane, 30 parts of 100cps ethoxy-terminated polydimethylsiloxane, 100 parts of MIL-101@CaCO3, 15 parts of methyltrimethoxysilane, 4 parts of γ-aminopropyltrimethoxysilane, 4 parts of γ-glycidyl ether propyltriethoxysilane, and 0.1 part of tetraorthotitanate into a planetary mixer, stir and disperse under a vacuum degree of -0.090MPa for 60 minutes to obtain a dealcoholized silicone sealant with initial rapid curing.
[0036] Comparative Example 1
[0037] The only difference between Comparative Example 1 and Example 1 is that MIL-101@CaCO3 is replaced with commercially available nano-activated calcium carbonate Warner CCS-25i.
[0038] 100 parts of 2000cps α,ω-dihydroxypolydimethylsiloxane, 30 parts of 100cps methoxy-terminated polydimethylsiloxane, 120 parts of nano-activated calcium carbonate Warner CCS-25i, 30 parts of vinyltrimethoxysilane, 2 parts of N-(-βaminoethyl)-γ-aminopropyltriethoxysilane, and 1 part of 1,3-dipropoxybis(ethoxyacetoacetyl)titanium were added to a planetary mixer and stirred and dispersed under a vacuum degree of -0.095MPa for 40 minutes to obtain a dealcoholized silicone sealant.
[0039] Comparative Example 2
[0040] The only difference between Comparative Example 2 and Example 1 is that MIL-101@CaCO3 is replaced with the metal organic framework material MIL-101. The water vapor adsorption kinetic curve of MIL-101 was tested using a water vapor adsorption instrument. The water vapor diffusion coefficient in MIL-101 was calculated to be 1.318 cm at 25°C and 30% relative humidity. 2 / s.
[0041] 100 parts of 2000cps α,ω-dihydroxypolydimethylsiloxane, 30 parts of 100cps methoxy-terminated polydimethylsiloxane, 120 parts of MIL-101, 30 parts of vinyltrimethoxysilane, 2 parts of N-(-βaminoethyl)-γ-aminopropyltriethoxysilane, and 1 part of 1,3-dipropoxybis(ethoxyacetoacetyl)titanium were added to a planetary mixer and stirred and dispersed under a vacuum degree of -0.095MPa for 40 minutes to obtain a dealcoholized silicone sealant.
[0042] Comparative Example 3
[0043] The only difference between Comparative Example 3 and Example 1 is that the methoxy-terminated polydimethylsiloxane is replaced by polydimethylsiloxane.
[0044] 100 parts of 2000cps α,ω-dihydroxypolydimethylsiloxane, 30 parts of 100cps polydimethylsiloxane, 120 parts of MIL-101@CaCO3, 30 parts of vinyltrimethoxysilane, 2 parts of N-(-βaminoethyl)-γ-aminopropyltriethoxysilane, and 1 part of 1,3-dipropoxybis(ethoxyacetoacetyl)titanium were added to a planetary mixer and stirred and dispersed under a vacuum degree of -0.095MPa for 40 minutes to obtain a dealcoholized silicone sealant.
[0045] Comparative Example 4
[0046] The only difference between Comparative Example 4 and Example 1 is that MIL-101@CaCO3 is replaced with unreacted MIL-101 and CaCO3.
[0047] 100 parts of 2000cps α,ω-dihydroxypolydimethylsiloxane, 30 parts of 100cps methoxy-terminated polydimethylsiloxane, 48 parts of MIL-101(Cr), 72 parts of CaCO3, 30 parts of vinyltrimethoxysilane, 2 parts of N-(-βaminoethyl)-γ-aminopropyltriethoxysilane, and 1 part of 1,3-dipropoxybis(ethoxyacetoacetyl)titanium were added to a planetary mixer and stirred and dispersed under a vacuum degree of -0.095MPa for 40 minutes to obtain a dealcoholized silicone sealant.
[0048] Comparative Example 5
[0049] The only difference between Comparative Example 5 and Example 1 is that MIL-101@CaCO3 is replaced by UIO-66@CaCO3.
[0050] The preparation method of metal organic framework (MOF) modified filler is as follows:
[0051] By mass, 10 parts of zirconium tetrachloride and 8 parts of concentrated hydrochloric acid are dissolved in N,N-dimethylformamide, and 6 parts of hydrofluoric acid are slowly added. While stirring in a hydrothermal reactor, the temperature is uniformly raised to 80 degrees within 1 hour. After constant temperature reaction for 12 hours, the temperature is slowly lowered to room temperature. First wash with nitrogen, nitrogen dimethylformamide, filter and dry, then wash with anhydrous ethanol, filter and dry to obtain a metal organic framework, recorded as UIO-66 (Zr). Take 4 parts of UIO-66 (Zr), 1 part of aminopropyltriethoxysilane and 4 parts of heavy calcium carbonate (D50 is 150nm, specific surface area is 23m 2 / g) was ultrasonically dispersed in diethyl ether for 20 minutes, transferred to a hydrothermal reactor, and the temperature was uniformly raised to 150°C over 1 hour. After a constant temperature reaction for 6 hours, the temperature was uniformly lowered to 25°C over 8 hours. The product was washed sequentially with diethyl ether and anhydrous ethanol, filtered, and dried to obtain UIO-66 modified calcium carbonate, designated UIO-66@CaCO3. The water vapor adsorption kinetic curve was measured using a water vapor adsorption instrument, and the calculated diffusion coefficient of water vapor in UIO-66@CaCO3 at 25°C and 30% relative humidity was 0.112 cm 2 / s.
[0052] 100 parts of 2000cps α,ω-dihydroxypolydimethylsiloxane, 30 parts of 100cps methoxy-terminated polydimethylsiloxane, 120 parts of UIO-66@CaCO3, 30 parts of vinyltrimethoxysilane, 2 parts of N-(-βaminoethyl)-γ-aminopropyltriethoxysilane, and 1 part of 1,3-dipropoxybis(ethoxyacetoacetyl)titanium were added to a planetary mixer and stirred and dispersed under a vacuum of -0.095MPa for 40 minutes to obtain a dealcoholized silicone sealant.
[0053] Tests and results
[0054] Diffusion coefficient of water vapor in different powders: The water vapor adsorption kinetic curve was tested using a water vapor adsorption instrument to obtain the relationship between the water vapor adsorption component and the adsorption time. The diffusion coefficient D of water vapor in different materials was calculated: At 25°C and 30% relative humidity, the diffusion coefficient of water vapor in calcium carbonate is 0.003cm 2 / s, and the diffusion coefficient in MIL-101(Cr) is 1.318cm 2 / s, and the diffusion coefficient in MIL-101@CaCO3 ranges from 0.091 cm 2 / s~0.112cm 2 / s, and the diffusion coefficient in UIO-66(Zr) is 0.410 cm 2 / s, and the diffusion coefficient in UIO-66@CaCO3 is 0.110 cm 2 / s. As shown in the following table.
[0055]
[0056] Cure speed: Cure speed is expressed as the cured thickness measured in a given time. Tests were conducted under standard conditions (23°C, 50% RH) using Method 2: Wedge Trough Method as specified in GB / T 32369.2015. The cured thicknesses are shown in the table below. Mechanical properties were tested according to GB 16776. Both tensile bond strength and elongation at maximum tensile strength were determined by curing for 28 days at (23±2)°C and a relative humidity of (50±5)%.
[0057]
[0058] As shown in the table above, Examples 1 to 4 can all achieve a curing depth of more than 1 mm within 6 hours, can withstand a large displacement and load in a short period of time, and can meet higher requirements such as turning over doors and windows within 6 hours after gluing, and transporting and squeezing photovoltaic modules within 6 hours after gluing. This is the biggest breakthrough of the present invention compared to traditional products.
[0059] In Comparative Example 1, after replacing the metal-organic framework-modified calcium carbonate (MIL-101@CaCO3) with active nano-calcium, both the 6-hour and 24-hour cure depths dropped significantly, reaching less than 1mm in the 6-hour period. This is no longer sufficient to allow doors and windows to be turned over within 6 hours after sealing. Turning over or significantly shaking the sealant can cause cracking. The high cure speeds in both the initial (0-6 hours) and later (6-24 hours) phases rely on the superior water vapor diffusion rate of MIL-101@CaCO3 compared to active nano-calcium. Water vapor rapidly diffuses through the filler within the sealant, enabling the sealant to cure deeply and continuously within a short period of time.
[0060] In Comparative Example 2, replacing the metal-organic framework-modified calcium carbonate (MIL-101@CaCO3) with the metal-organic framework MIL-101 significantly improved the 6-hour and 24-hour cure depths. This is because MIL-101 has an orders of magnitude higher water vapor diffusion rate than MIL-101@CaCO3. Limited by the sealant's reaction rate with water vapor, the 6-hour cure depth increased to 2.4 mm. However, due to the lack of reinforcement provided by MIL-101, the mechanical strength of Comparative Example 2 was very poor, making it of no practical value in building sealants, and the sealant easily fractured.
[0061] In Comparative Example 3, replacing alkoxy-terminated polydimethylsiloxane with polydimethylsiloxane resulted in a significant decrease in the 6-hour cure depth. This is because alkoxy silicone oil can participate in crosslinking and is highly reactive, providing a large number of active sites compared to the inert dimethyl silicone oil. These active sites significantly improve the cure speed in the early stages of curing. The 6-hour cure depth was less than 1mm, which is insufficient to meet the requirement for turning over doors and windows within 6 hours after sealing. Turning over or significantly shaking the sealant can cause cracking.
[0062] In Comparative Example 4, replacing MIL-101@CaCO3 with unreacted MIL-101 and CaCO3 resulted in a significant decrease in the 6-hour cure depth. This is because the diffusion rate of water vapor is determined by the slowest point in the transmission channel. While MIL-101 has a fast water vapor diffusion rate, CaCO3 diffuses much more slowly, so water vapor diffusion is trapped between the inflow and outflow of CaCO3. The 6-hour cure depth was less than 1mm, which was insufficient to meet the requirement for turning over doors and windows within 6 hours after sealing. Turning over or significantly shaking the sealant would cause cracking.
[0063] In Comparative Example 5, replacing MIL-101@CaCO3 with UIO-66@CaCO3 resulted in a significant decrease in the 6-hour cure depth. This is because UIO-66 is primarily microporous, resulting in a lower water vapor diffusion rate than MIL-101. Furthermore, UIO-66 has fewer active sites for reaction with calcium carbonate, making the composite material produced with calcium carbonate less effective than the composite material produced with MIL-101. The 6-hour cure depth was less than 1mm, which is insufficient to meet the requirement for flipping doors and windows within 6 hours after sealing. Flipping or excessive shaking can cause the sealant to crack.
[0064] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. A method for preparing a dealcoholized silicone sealant with rapid initial curing, characterized in that: The following steps are involved: The metal organic framework MIL-101, silane coupling agent and calcium carbonate are dispersed in an organic solvent, and then the temperature is raised to 140-160°C and reacted for 5-7 hours to obtain MIL-101@CaCO3; According to parts by mass, 100 parts of α,ω-dihydroxy polydimethylsiloxane, 20 to 30 parts of alkoxy-terminated polydimethylsiloxane, 100 to 120 parts of MIL-101@CaCO3, 15 to 30 parts of a cross-linking agent, 2 to 8 parts of a coupling agent, and 0.1 to 1 part of a catalyst are mixed and dispersed to obtain the dealcoholized silicone sealant.
2. The preparation method according to claim 1, characterized in that The mass ratio of the MIL-101, the silane coupling agent and the calcium carbonate is 4:0.5-1.5:4-6.
3. The preparation method according to claim 1, characterized in that The alkoxy-terminated polydimethylsiloxane is selected from one or more of methoxy-terminated polydimethylsiloxane and ethoxy-terminated polydimethylsiloxane.
4. The preparation method according to claim 1, characterized in that The viscosity of the α,ω-dihydroxy polydimethylsiloxane is 2000-20000 cps, and the viscosity of the alkoxy-terminated polydimethylsiloxane is 100-350 cps.
5. The preparation method according to claim 1, characterized in that The preparation method of MIL-101 comprises the following steps: dissolving 10 parts by mass of chromium nitrate and 4 parts of terephthalic acid in water, adding 6 parts of hydrofluoric acid, heating to 210-230 degrees, reacting for 7-9 hours, and obtaining MIL-101.
6. The preparation method according to claim 1, characterized in that The D50 of the calcium carbonate is 100-200 nm, and the specific surface area is 22-25 m 2 / g.
7. The preparation method according to claim 1, characterized in that The crosslinking agent is selected from one or more of methyltrimethoxysilane, vinyltrimethoxysilane, phenyltrimethoxysilane and vinyltriethoxysilane.
8. The preparation method according to claim 1, characterized in that The coupling agent is selected from one or more of γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-(-β-aminoethyl)-γ-aminopropyltriethoxysilane, γ-glycidyl ether propyltrimethoxysilane, γ-glycidyl ether propyltriethoxysilane, epoxycyclohexyltrimethoxysilane, epoxycyclohexyltriethoxysilane, mercaptopropyltrimethoxysilane, mercaptopropyltriethoxysilane, isocyanatetrimethoxysilane and isocyanatetriethoxysilane.
9. The preparation method according to claim 1, characterized in that The catalyst is selected from one or more of tetraisopropyl titanate, tetrabutyl titanate, diisopropoxybis(ethoxyacetoacetyl) titanium, di-n-butoxybis(ethoxyacetoacetyl) titanium and 1,3-dipropoxybis(ethoxyacetoacetyl) titanium.
10. A dealcohol-type silicone sealant with rapid initial curing, characterized in that: Prepared according to the preparation method according to any one of claims 1 to 9.