A jointing agent for gutter installation and a method for preparing the same

Abstract

The application belongs to the technical field of building materials, and particularly relates to a joint sealing agent for installing a drainage ditch and a preparation method thereof, which comprises the following raw materials in parts by weight: polyurethane acrylate resin 35-50 parts, Portland cement 20-30 parts, fly ash 10-15 parts, kaolin 5-10 parts, modified carbon fiber 3-6 parts, photoinitiator 0.2-1 part, organic silicon waterproof agent 0.5-2 parts, and stabilizer 4-8 parts. The modified carbon fiber is added in the joint sealing agent as a reinforcing phase, which can effectively enhance the mechanical strength and wear resistance of the joint sealing agent after curing. The stabilizer is added in the joint sealing agent, which plays an antioxidation and antibacterial role. The polyurethane acrylate resin is used as the main filler, the photoinitiator has good stability, and the mixture can be stored in the dark after mixing, and the photocuring speed is fast and the use is convenient.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building materials, and particularly relates to a joint sealing agent for installation of a drainage ditch and a preparation method thereof. BACKGROUND

[0002] The drainage ditch is a linear drainage facility for drainage, which is usually set according to the use function and production process needs, and is used for collecting and removing production sewage, waste water and other road surface water to keep the ground dry and safe. The traditional drainage ditch is embedded into the ground floor with an independent structure, and when people or vehicles pass by, the drainage ditch and the ground floor will collide with each other, and the gap between the two will gradually increase in this state for a long time, so that the ground will be cracked to cause water seepage accidents, which will reduce the service life of the drainage ditch and also affect the flatness of the road surface. In order to solve the sealing and fixing problems of the joint and the connecting part, a joint sealing agent is needed to better connect and fix the drainage ditch and the ground floor during installation.

[0003] The drainage ditch and the ground floor are usually made of different materials or structures, and the performance difference is large. In order to reduce the displacement between the two caused by vibration or temperature difference and reduce the risk of interface cracking, the joint sealing agent for installing the drainage ditch needs to have good mechanical properties, which can buffer the thermal expansion and contraction between different materials, adapt to material deformation and prevent cracking; good waterproofness and mildew resistance, which can prevent water penetration from causing foundation loosening or wall mildew; good weather resistance and durability, which can resist aging, mildew, ultraviolet rays and chemical corrosion to adapt to long-term outdoor use; and smooth surface to reduce dirt accumulation and facilitate cleaning and maintenance to meet environmental requirements. However, the existing joint sealing agent for installing the drainage ditch still cannot meet the comprehensive performance requirements of mechanical properties, ultraviolet aging resistance and mildew resistance, so further research is still needed on the joint sealing agent for installing the drainage ditch. SUMMARY

[0004] The first object of the present application is to provide a joint sealing agent for installing a drainage ditch.

[0005] The second object of the present application is to provide a preparation method of the joint sealing agent for installing the drainage ditch.

[0006] In order to achieve the above objects, the technical solution adopted by the present application is as follows:

[0007] The present application provides a joint sealing agent for installing a drainage ditch, which comprises the following raw materials by weight: polyurethane acrylate resin 35-50 parts, silicate cement 20-30 parts, fly ash 10-15 parts, kaolin 5-10 parts, modified carbon fiber 3-6 parts, photoinitiator 0.2-1 part, organic silicon waterproof agent 0.5-2 parts, and stabilizer 4-8 parts.

[0008] The preparation method of the modified carbon fiber comprises the following steps:

[0009] (1) Ultrasonic dispersion of carbon fibers in deionized water, adding a silane coupling agent for reaction; after the reaction, filtering, washing, and drying to obtain activated carbon fibers;

[0010] (2) Boric acid and urea are added to anhydrous ethanol and stirred to dissolve, and then activated carbon fibers are added for ultrasonic dispersion, followed by reaction under an NH3 atmosphere; after the reaction, the modified carbon fibers are obtained by filtration, washing, and drying.

[0011] Preferably, in step (1), the mass ratio of carbon fiber, silane coupling agent and deionized water is 1: (0.02-0.05): (20-40); the reaction temperature is 60-80°C, and the reaction time is 1-2h.

[0012] Preferably, in step (2), the mass ratio of boric acid, urea, activated carbon fiber, and anhydrous ethanol is 1: (3-5): (3-6): (20-30); the ultrasonic dispersion time is 5-10 min; the reaction temperature is 900-1000° C., and the reaction time is 1-2 h.

[0013] Preferably, the preparation method of the stabilizer comprises the following steps: dissolving sodium selenate and hydrazine hydrate in deionized water, and then adding mesoporous titanium dioxide to react; after the reaction, filtering, washing, and drying to obtain the stabilizer.

[0014] Preferably, the mass ratio of the sodium selenate, mesoporous titanium dioxide, hydrazine hydrate and deionized water is 1: (2.5-4): (9-10): (220-250); the reaction temperature is 150-180° C., and the reaction time is 4-5 hours.

[0015] Preferably, the diameter of the mesoporous titanium dioxide is 200-600 nm, the pore size is 2-10 nm, and the specific surface area is 50-100 m 2 / g.

[0016] Among them, titanium dioxide has photocatalytic properties. Under the action of ultraviolet light, it will produce active oxygen, destroy the cell structure of microorganisms, and has good antibacterial effect. The large specific surface area of ​​the mesoporous structure can enhance the contact with bacteria and improve the antibacterial performance. Titanium dioxide can also absorb ultraviolet rays and neutralize and eliminate free radicals, which can delay the oxidation of the sealant. In addition, titanium dioxide particles as fillers can also play a mechanical strengthening role and improve the mechanical properties of the sealant.

[0017] Preferably, the polyurethane acrylate resin is SARTOMER CN9010NS; the photoinitiator is photoinitiator TPO; the organosilicon waterproofing agent is SILRES BS4004; and the silane coupling agent is silane coupling agent QX1324.

[0018] The invention provides a preparation method of the caulking agent for installing a drainage ditch, comprising the following steps: weighing various raw material components according to the raw material ratio, stirring and mixing in the dark, and obtaining the caulking agent.

[0019] Preferably, the stirring rate is 500-700 r / min and the stirring time is 1-3 h.

[0020] Compared with the prior art, the beneficial effects of the present invention are mainly:

[0021] The present invention provides a caulking agent for installing drainage ditches, in which modified carbon fibers are added as a reinforcing phase. The carbon fibers are cross-linked with the resin. When subjected to a load, the carbon fibers and the resin jointly bear and disperse the stress, which can effectively enhance the strength, crack resistance and wear resistance of the caulking agent after curing. Among them, the present invention first uses a silane coupling agent to modify the carbon fibers. The siloxane groups in the coupling agent can condense with the carbon fibers after hydrolysis to form Si-O-Si bonds. At the same time, the coupling agent can also be grafted with boron nitride to form BO-Si bonds. The modification of the coupling agent plays a role in enhancing the interfacial bonding performance between the carbon fibers and the boron nitride. Furthermore, a boron nitride coating is prepared on the surface of the carbon fibers. Boron nitride has high hardness and can enhance the wear resistance of the fibers. At the same time, boron nitride does not react to weak bases or strong bases at room temperature, which can enhance the corrosion resistance of the fibers.

[0022] The present invention uses titanium dioxide mesoporous microspheres doped with titanium diselenide as a stabilizer, which plays an antioxidant and antibacterial role in the caulking agent. Titanium dioxide has photocatalytic properties and good antibacterial performance, and selenium ions have antibacterial and antioxidant properties. The present invention dopes titanium dioxide with titanium diselenide. The addition of titanium diselenide broadens the light response range of titanium dioxide, increases photocatalytic efficiency, and improves its antibacterial and antioxidant activity. Simultaneously, the mesoporous structure of titanium dioxide enables the sustained release of selenium, enhancing safety. The synergistic effect of these two factors significantly optimizes the antibacterial and antioxidant properties of the caulking agent.

[0023] The invention provides a preparation method of a caulking agent for installing a drainage ditch. The caulking agent adopts polyurethane acrylate resin as a main filler and a photoinitiator with good stability. The caulking agent can be stored away from light after mixing. The caulking agent has a fast light curing speed and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Scanning electron microscope image of the modified carbon fiber obtained in Example 1 of the present invention.

[0025] Figure 2 Scanning electron microscope image of the stabilizer obtained in Example 1 of the present invention. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be further described below in conjunction with specific embodiments. However, it should be understood by those skilled in the art that the following examples are only intended to illustrate the present invention and should not be construed as limiting the present invention. Specific conditions not specified in the examples are to be followed according to conventional conditions or the conditions recommended by the manufacturer. All reagents or instruments used, unless otherwise specified, are conventional products obtained from commercial channels.

[0027] The preparation method of mesoporous titanium dioxide in the embodiment of the present invention includes the following steps: adding titanium tetrachloride to a mixed solution of n-propanol and deionized water in a volume ratio of 3:1 at 0°C, wherein the amount ratio of titanium tetrachloride to the mixed solution is 0.1 mol: 1 L; continuing to stir and react at 0°C for 5 hours; then heating to 80°C, continuing to age and react for 20 minutes, adjusting the solution to neutrality, filtering, and washing to obtain a reaction product; mixing the reaction product with anhydrous ethanol and deionized water, wherein the amount ratio of the reaction product to anhydrous ethanol and deionized water is 1g:20mL:10mL; then adding ammonia water with a mass fraction of 27%, and the amount ratio of the reaction product to ammonia water is 1g:0.5mL; reacting at 160°C in a reactor for 12 hours, washing, and drying to obtain mesoporous titanium dioxide (diameter of 200-600nm, pore size of 2-10nm, specific surface area of ​​50-100m 2 / g).

[0028] Example 1

[0029] This embodiment relates to a caulking agent for installing drainage ditches, comprising the following raw materials in parts by weight: 42 parts of polyurethane acrylate resin (SARTOMER CN9010NS), 25 parts of Portland cement, 12 parts of fly ash, 8 parts of kaolin, 5 parts of modified carbon fiber, 0.5 parts of photoinitiator TPO (diphenyl-(2,4,6-trimethylbenzoyl) phosphine oxide), 1 part of silicone waterproofing agent (SILRES BS4004), and 6 parts of stabilizer;

[0030] The preparation method of the modified carbon fiber in this embodiment includes the following steps:

[0031] (1) Ultrasonic dispersion of carbon fibers (5-10 μm in diameter) in deionized water, addition of silane coupling agent QX1324 (tridecafluorooctyl triethoxysilane), wherein the mass ratio of carbon fibers, silane coupling agent, and deionized water is 1:0.04:30; ultrasonic treatment at 70°C for 1.5 h, filtration, washing, and drying to obtain activated carbon fibers;

[0032] (2) Add boric acid and urea to anhydrous ethanol and stir to dissolve, add activated carbon fiber and ultrasonically disperse for 8 minutes, wherein the mass ratio of boric acid, urea, activated carbon fiber and anhydrous ethanol is 1:4:5:25; vacuum evaporate the solvent, pyrolyze at 950℃ under NH3 atmosphere for 2 hours, filter, wash and dry to obtain modified carbon fiber. The scanning electron microscope image of the obtained modified carbon fiber is as follows: Figure 1 shown.

[0033] The preparation method of the stabilizer in this embodiment includes the following steps: dissolving sodium selenate and hydrazine hydrate in deionized water, then adding mesoporous titanium dioxide, wherein the mass ratio of sodium selenate, mesoporous titanium dioxide, hydrazine hydrate and deionized water is 1:3:10:240; reacting at 170°C for 4.5 hours, filtering, washing and drying to obtain the stabilizer. The scanning electron micrograph of the obtained stabilizer is shown below. Figure 2 shown.

[0034] The preparation method of the caulking agent for drainage ditch installation in this embodiment includes the following steps: weighing the raw material components according to the raw material ratio, adding them into a stirring tank, and stirring them in the dark at a speed of 600 r / min under vacuum conditions for 2 hours to obtain the caulking agent.

[0035] Example 2

[0036] This embodiment relates to a caulking agent for installing a drainage ditch, comprising the following raw materials in parts by weight: 50 parts of polyurethane acrylate resin (SARTOMER CN9010NS), 30 parts of Portland cement, 15 parts of fly ash, 10 parts of kaolin, 6 parts of modified carbon fiber, 1 part of photoinitiator TPO, 2 parts of silicone waterproofing agent (SILRES BS4004), and 8 parts of stabilizer;

[0037] The preparation method of the modified carbon fiber in this embodiment includes the following steps:

[0038] (1) Ultrasonic dispersion of carbon fiber in deionized water, addition of silane coupling agent QX1324, wherein the mass ratio of carbon fiber, silane coupling agent, and deionized water is 1:0.05:40; ultrasonic treatment at 80°C for 1 h, filtration, washing, and drying to obtain activated carbon fiber;

[0039] (2) Boric acid and urea were added to anhydrous ethanol and stirred to dissolve, and activated carbon fiber was added and ultrasonically dispersed for 10 minutes, wherein the mass ratio of boric acid, urea, activated carbon fiber and anhydrous ethanol was 1:5:6:30; the solvent was evaporated in vacuo, and the product was pyrolyzed at 900 °C for 1 hour under NH3 atmosphere, filtered, washed and dried to obtain modified carbon fiber.

[0040] The preparation method of the stabilizer in this embodiment includes the following steps: dissolving sodium selenate and hydrazine hydrate in deionized water, and then adding mesoporous titanium dioxide, wherein the mass ratio of sodium selenate, mesoporous titanium dioxide, hydrazine hydrate and deionized water is 1:4:10:250; reacting at 180°C for 4 hours, filtering, washing and drying to obtain the stabilizer.

[0041] The preparation method of the caulking agent for installing the drainage ditch in this embodiment includes the following steps: weighing the raw material components according to the raw material ratio, adding them into a stirring tank, and stirring them in the dark at a speed of 700 r / min under vacuum conditions for 1 hour to obtain the caulking agent.

[0042] Example 3

[0043] This embodiment relates to a caulking agent for installing a drainage ditch, comprising the following raw materials in parts by weight: 35 parts of polyurethane acrylate resin (SARTOMER CN9010NS), 20 parts of Portland cement, 10 parts of fly ash, 5 parts of kaolin, 3 parts of modified carbon fiber, 0.2 parts of TPO photoinitiator, 0.5 parts of silicone waterproofing agent (SILRES BS4004), and 4 parts of stabilizer;

[0044] The preparation method of the modified carbon fiber in this embodiment includes the following steps:

[0045] (1) Ultrasonic dispersion of carbon fiber in deionized water, addition of silane coupling agent QX1324, wherein the mass ratio of carbon fiber, silane coupling agent, and deionized water is 1:0.02:20; ultrasonic treatment at 60°C for 2 h, filtration, washing, and drying to obtain activated carbon fiber;

[0046] (2) Boric acid and urea were added to anhydrous ethanol and stirred to dissolve, and activated carbon fiber was added and ultrasonically dispersed for 5 minutes, wherein the mass ratio of boric acid, urea, activated carbon fiber and anhydrous ethanol was 1:3:3:20; the solvent was evaporated in vacuo, and the product was pyrolyzed at 1000°C for 2 hours under NH3 atmosphere. After filtering, washing and drying, the modified carbon fiber was obtained.

[0047] The preparation method of the stabilizer in this embodiment includes the following steps: dissolving sodium selenate and hydrazine hydrate in deionized water, and then adding mesoporous titanium dioxide, wherein the mass ratio of sodium selenate, mesoporous titanium dioxide, hydrazine hydrate and deionized water is 1:2.5:9:220; reacting at 150°C for 5h, filtering, washing and drying to obtain the stabilizer.

[0048] The preparation method of the caulking agent for installing the drainage ditch in this embodiment includes the following steps: weighing the raw material components according to the raw material ratio, adding them into a stirring tank, and stirring them in the dark at a speed of 500 r / min under vacuum conditions for 3 hours to obtain the caulking agent.

[0049] Comparative Example 1

[0050] The difference between this comparative example and Example 1 is that the modified carbon fiber is replaced by carbon fiber.

[0051] Comparative Example 2

[0052] The difference between this comparative example and Example 1 is that the stabilizer is replaced by mesoporous titanium dioxide.

[0053] Comparative Example 3

[0054] The difference between this comparative example and Example 1 is that the stabilizer is replaced by a direct mixture of mesoporous titanium dioxide and titanium diselenide, and the amount used is the same as that in Example 1.

[0055] Test example

[0056] 1. According to JC / T1004-2017 "Ceramic Tile Sealant", the caulking agents for drain ditch installation obtained in Examples 1-3 and Comparative Examples 1-3 were cured, and the flexural strength, compressive strength and wear resistance were measured. The results are shown in Table 1.

[0057] 2. Determination of aging and yellowing resistance: After curing the sealants for installing drainage ditches obtained in Examples 1-3 and Comparative Examples 1-3, the sealants were heated at 30 mw / cm 2 After 12 h of UV irradiation, the yellowing resistance of the samples was measured. The results are shown in Table 1.

[0058] 3. Anti-mildew performance measurement: After the sealants for installing drainage ditches obtained in Examples 1-3 and Comparative Examples 1-3 were cured, they were scrubbed with water 200 times and their anti-mildew performance was measured. The results are shown in Table 1.

[0059] Table 1

[0060]

[0061] As can be seen from Table 1, the caulking agents for drain ditch installation obtained in Examples 1-3 of the present invention have better mechanical properties, wear resistance, resistance to yellowing due to aging, and mildew resistance than those in Comparative Examples 1-3. Specifically, the present invention adds modified carbon fibers as a reinforcing phase to the caulking agent, which can effectively enhance the mechanical strength and wear resistance of the caulking agent after curing. Among them, the carbon fibers are first modified using a silane coupling agent, and then boron nitride is grafted. After modification with the coupling agent, the interfacial bonding strength between the carbon fibers and the boron nitride is enhanced, and a boron nitride coating is prepared on the surface of the carbon fibers, which can improve the wear resistance of the fibers. The present invention uses titanium dioxide mesoporous microspheres doped with titanium diselenide as a stabilizer, which plays an antioxidant and antibacterial role in the caulking agent. Among them, titanium dioxide has photocatalytic properties and good antibacterial properties, and selenium ions have antibacterial and antioxidant properties. Doping titanium diselenide in titanium dioxide can improve the photocatalytic efficiency and improve the antibacterial and antioxidant activity of titanium dioxide. The two synergistically optimize the antibacterial and antioxidant properties of the caulking agent.

[0062] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the same. The basic principles and main features of the present invention have been described above using specific implementation schemes. Modifications or substitutions may be made based on the present invention, but such modifications or substitutions do not detract from the essence of the corresponding technical solutions from the scope of protection claimed by the present invention.

Claims

1. A sealant for drainage ditch installation, characterized in that: The invention comprises the following raw materials in parts by weight: 35-50 parts of polyurethane acrylate resin, 20-30 parts of Portland cement, 10-15 parts of fly ash, 5-10 parts of kaolin, 3-6 parts of modified carbon fiber, 0.2-1 part of photoinitiator, 0.5-2 parts of organosilicon waterproofing agent, and 4-8 parts of stabilizer; The preparation method of the modified carbon fiber comprises the following steps: (1) Ultrasonic dispersion of carbon fibers in deionized water, adding a silane coupling agent for reaction; after the reaction, filtering, washing, and drying to obtain activated carbon fibers; (2) Adding boric acid and urea to anhydrous ethanol and stirring to dissolve, then adding activated carbon fiber to perform ultrasonic dispersion, and then reacting under an NH3 atmosphere; after the reaction, filtering, washing, and drying to obtain modified carbon fiber; The preparation method of the stabilizer comprises the following steps: dissolving sodium selenate and hydrazine hydrate in deionized water, then adding mesoporous titanium dioxide to react; after the reaction, filtering, washing and drying to obtain the stabilizer.

2. The sealant for installing a drainage ditch according to claim 1, characterized in that: In the step (1), the mass ratio of carbon fiber, silane coupling agent and deionized water is 1: (0.02-0.05): (20-40); the reaction temperature is 60-80° C. and the reaction time is 1-2 h.

3. The sealant for installing a drainage ditch according to claim 1, characterized in that: In step (2), the mass ratio of boric acid, urea, activated carbon fiber, and anhydrous ethanol is 1:(3-5):(3-6):(20-30); the ultrasonic dispersion time is 5-10 minutes; the reaction temperature is 900-1000°C, and the reaction time is 1-2 hours.

4. The sealant for installing a drainage ditch according to claim 1, characterized in that: In the preparation method of the stabilizer, the mass ratio of the sodium selenate, mesoporous titanium dioxide, hydrazine hydrate and deionized water is 1: (2.5-4): (9-10): (220-250); the reaction temperature is 150-180° C., and the reaction time is 4-5 hours.

5. The sealant for installing a drainage ditch according to claim 1, characterized in that: The mesoporous titanium dioxide has a diameter of 200-600 nm, a pore size of 2-10 nm, and a specific surface area of ​​50-100 m 2 / g.

6. The sealant for installing a drainage ditch according to claim 1, characterized in that: The polyurethane acrylate resin is SARTOMER CN9010NS; the photoinitiator is photoinitiator TPO; the organic silicone waterproofing agent is SILRESBS4004; and the silane coupling agent is silane coupling agent QX1324.

7. The method for preparing the sealant for installing a drainage ditch according to any one of claims 1 to 6, characterized in that: The following steps are involved: Weigh the raw material components according to the raw material ratio, stir and mix in the dark, and obtain the sealant.

8. The method for preparing the sealant for installing a drainage ditch according to claim 7, characterized in that: The stirring rate is 500-700 r / min, and the time is 1-3 h.

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