Colored sand type seam beautifying agent and preparation method thereof

Abstract

The invention belongs to the field of seam beautifying agents, and mainly relates to a color sand type seam beautifying agent and a preparation method thereof, silane modified polyether is used for preparing a basic polymer, and the basic polymer is applied to preparation of the color sand type seam beautifying agent. The colored sand type sealant overcomes the defects of yellowing resistance and weather resistance of an epoxy sealant, has the advantages of yellowing resistance and good weather resistance, and can be widely applied outdoors; in addition, the coating also has the characteristics of high hardness, good mildew resistance, easy construction by single component, environmental protection, low VOC and the like; most importantly, the product has matte sand feeling, is easy to remove glue after construction, and can be comparable with an epoxy sealant in cleaning property.

Description

Technical Field

[0001] The invention belongs to the field of seam beautifying agents, and mainly relates to a colored sand type seam beautifying agent and a preparation method thereof. Background Art

[0002] During the renovation process, gaps often need to be filled, and caulking agents are usually used. Epoxy caulking agents are more commonly used, but they have poor weather resistance and yellowing resistance, and are prone to yellowing when used outdoors; especially when used in floor heating areas, they are prone to yellowing and cracking, and lose their effectiveness. Other two-component caulking agents are also difficult to apply, and manual mixing may result in uneven mixing and non-curing risks.

[0003] Silane modified polyether caulking agent is also a commonly used caulking agent, but there are also many problems in the existing products, such as:

[0004] 1. The hardness of silane-modified polyether caulking agent is relatively soft, which does not meet the hardness requirement of caulking agent as hard as porcelain;

[0005] 2. After the construction of silane-modified polyether caulking agent, it is not easy to remove the glue.

[0006] Silane-modified polyether caulking agent has good wetting properties for most inorganic materials and metal materials due to its high polymer permeability, thus having good wetting ability for the substrate, thus producing good adhesion to the substrate. However, it also causes the problem of degumming of silane-modified polyether caulking agent after construction, which has become an industry problem and seriously affected its application in the market. Precisely because of its poor cleaning properties, the mainstream in the market is still the epoxy caulking agent with insufficient performance. Summary of the invention

[0007] In order to solve the above-mentioned technical problems, the present invention provides a colored sand type seam beautifying agent and a preparation method thereof, which solves the shortcomings of the epoxy seam beautifying agent in terms of yellowing resistance and weather resistance, has the advantages of yellowing resistance and good weather resistance, and can be widely used outdoors; in addition, it also has the characteristics of high hardness, good mildew resistance, single-component easy construction, environmental protection, low VOC, etc.; most importantly, the product has a matte sand feel, is easy to remove glue after construction, and its cleanliness is comparable to that of the epoxy seam beautifying agent.

[0008] To solve the above problems, the present invention is implemented through the following technical solutions:

[0009] The first invention object of the present invention is:

[0010] Provided is a method for preparing a colored sand type seam beautifying agent, comprising the following preparation steps:

[0011] A. Preparation of base polymer:

[0012] It includes the following components in weight percentage:

[0013] Silane modified polyether 70% to 90%, lithium aluminum hydride 1% to 9%, trifluoroacetic acid 4% to 20%; mold release wax soluble in polyether 0.5% to 1%; the sum of all components is 100%;

[0014] Calculate the exact amount of each component to be added based on the relative molecular mass of the selected silane-modified polyether;

[0015] It comprises the following preparation steps:

[0016] S1. Select silane-modified polyether in proportion, add it to a three-necked flask, slowly add lithium aluminum hydride, stir while adding, raise the temperature to 70-80°C, react for 2-6h, and after sufficient reaction, obtain the first intermediate;

[0017] S2. The temperature is maintained at 60-80°C, trifluoroacetic acid is added dropwise, stirring, and the reaction is carried out for 2-3 hours to obtain the second step intermediate;

[0018] S3. Add a release wax soluble in polyether to the intermediate in the second step, raise the temperature to 100-105°C, stir while adding, turn on the vacuum, the vacuum degree must reach above -0.095, dissolve the release wax at high temperature and remove water at high temperature for 1 hour, take a sample to test the moisture content, the moisture content is less than 200PPM, and cool to room temperature to obtain a base polymer;

[0019] B. Preparation of colored sand type seam beautifying agent:

[0020] It includes the following components in weight percentage:

[0021] Base polymer 10-35%, hardening resin 5-20%, UV absorber 0.25-1%, light stabilizer 0.25-1%, mildew inhibitor 0.5-1%, thixotropic agent 0-5%, titanium dioxide 1-1.5%, color paste 0.01-0.5%, active calcium carbonate 0-20%, natural colored sand 30-65%, fumed silica 0-5%, dehydrating agent 1-1.5%, curing accelerator 0.5-2%, the sum of all components is 100%;

[0022] Activated calcium carbonate, thixotropic agent and fumed silica all play the role of increasing thixotropy, preventing sedimentation and preventing sagging. One or more of them can be selected for use as needed.

[0023] The hardening resin has a viscosity of 100 to 200 mm 2 / s, a linear silane-modified polyether resin with polyurethane mechanical properties, containing 2 or more reactive groups that can serve as crosslinking points;

[0024] It comprises the following preparation steps:

[0025] s1. After the dual planetary mixer is started, the base polymer, hardening resin, UV absorber, light stabilizer, mildew inhibitor, thixotropic agent, titanium dioxide, and color paste are fully mixed in proportion; the temperature is controlled at 50°C to 55°C for 30 minutes to fully activate the activity of the thixotropic agent polyamide wax to prepare a premix;

[0026] s2. Select activated calcium carbonate, natural colored sand, and fumed silica, dehydrate at 120°C for 12h to 24h, measure the moisture content to be less than 2000PPM, and then cool to below 50°C for use;

[0027] s3. The natural colored sand, activated calcium carbonate and fumed silica after the treatment in step s2 are added to the premix obtained in step s1, the vacuum is turned on, the vacuum degree is above -0.090, high-speed stirring is performed for 40min to 1h, and the material temperature is controlled below 55°C;

[0028] s4. The material temperature is reduced to 40°C-45°C, a dehydrating agent is added, and the mixture is stirred for 15 minutes; a curing accelerator is added, and the mixture is stirred for 15 minutes; after vacuum degassing for 15 minutes, the material is filled and discharged to prepare a colored sand type seam beautifying agent.

[0029] The preparation method of the colored sand type seam beautifying agent of the present invention is further optimized as follows:

[0030] The high-temperature dehydration in step S3 uses a high-temperature vacuum dehydration method for silane-modified polyethers that do not self-crosslink at high temperatures; for silane-modified polyethers that self-crosslink at high temperatures, Borchers' dehydrating agent TI is used for titration. The overall requirement is to control the moisture content of the base polymer below 200 PPM.

[0031] Reaction equation for dehydration agent TI titration:

[0032]

[0033] The preparation method of the colored sand type seam beautifying agent of the present invention is further optimized as follows:

[0034] The silane-modified polyether is one or a combination of Wacker XB502, Wacker XT50, XT55, STP-E15, and STP-E35.

[0035] The preparation method of the colored sand type seam beautifying agent of the present invention is further optimized as follows:

[0036] The demoulding wax is one or a combination of carnauba wax and Micron No. 8 wax.

[0037] The preparation method of the colored sand type seam beautifying agent of the present invention is further optimized as follows:

[0038] It includes one or a combination of the following features:

[0039] The hardening resin is Wacker XT120;

[0040] The UV absorber is benzotriazole;

[0041] The light stabilizer is a hindered amine type;

[0042] The mildew inhibitor is an isothiazolinone derivative;

[0043] The thixotropic agent is polyamide wax;

[0044] The thixotropic agent is one or a combination of polyamide wax and fumed silica;

[0045] The activated calcium carbonate has a water content of less than 2000 PPM and a particle size of 300 nm;

[0046] The natural colored sand is one or a combination of 150 mesh, 200 mesh, 220 mesh, 320 mesh, and 400 mesh colored sand;

[0047] The dehydrating agent is one or a combination of vinyl trimethoxy silane and vinyl triethoxy silane;

[0048] The curing accelerator is one or a combination of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, and 1,8-diazabicyclo[5.4.0]undec-7-ene.

[0049] The preparation method of the colored sand type seam beautifying agent of the present invention is further optimized as follows:

[0050] The UV absorber is one or a combination of BASF Tinuvin 326, Tinuvin 328, Tinuvin 928 and Tinuvin P;

[0051] The light stabilizer is one or a combination of BASF Tinuvin 770, Tinuvin 292, Tinuvin 249;

[0052] The thixotropic agent is one or a combination of Arkema SLT, SLX, Wacker H18, and Cabot TS-720;

[0053] The activated calcium carbonate is Omyabond 120, a calcium carbonate produced by Omay.

[0054] In the preparation process of the base polymer in the preparation method of the colored sand type seam beautifying agent of the present invention, the first step is to use lithium aluminum hydride as a reducing agent to reduce the amide group on the main chain of the silane-modified polyether to a secondary amine group. The reaction mechanism is as follows:

[0055] (Lithium aluminum hydride was used as the reducing agent)

[0056]

[0057] In the second step, trifluoroacetic acid is added to react with the reduced secondary amine group on the main chain of the silane-modified polyether to obtain the second intermediate containing a CF bond on the main chain.

[0058] Reaction mechanism:

[0059] R2NH+CF3COOH→R2NCOCF3+H2O

[0060]

[0061] (R in organic chemistry represents any group that does not participate in the reaction)

[0062] The third step is to add a release wax such as palm wax and Micron No. 8 wax which can be dissolved in the polyether system in molecular form through the second intermediate in the second step to prepare the base polymer of the present invention;

[0063] During the polymer curing process, the molecular forms of palm wax and Micron No. 8 wax form a wax film, which reduces the deep penetration of the polymer into the substrate and weakens the adhesion of the caulking agent to the substrate. With the above steps, the construction glue removal can reach the level of epoxy caulking agent.

[0064] The second object of the present invention is:

[0065] Provided is a colored sand type seam beautifying agent, which is prepared according to the above-mentioned method for preparing the colored sand type seam beautifying agent.

[0066] The colored sand type seam beautifying agent and the preparation method thereof of the present invention have the following characteristics:

[0067] 1. Technically, silane-modified polyether with better weather resistance and yellowing resistance is used as the raw material of the base polymer, and low viscosity, polyurethane mechanical properties, small molecular weight, short molecular chain, and a functional degree of at least 2 for the reaction are used to increase the cross-linking density of the resin to enhance the hardness, so as to meet the market demand for high weather resistance and high hardness of the seam beautifying agent;

[0068] 2. Using natural colored sand, the product surface has a frosted texture and beautiful appearance.

[0069] 3. Introduce a carbon-fluorine bond (CF) into the main chain of the silane-modified polyether polymer; utilize the non-adhesiveness of the carbon-fluorine bond to reduce the adhesion between the product and the substrate.

[0070] 4. In the optimization scheme, isothiazolinone derivatives are used as mildew inhibitors, which makes the product have multiple mildew resistance (3 times or more than level 0). The product can be widely used in outdoor, floor heating, bathroom and other areas prone to mildew growth. DETAILED DESCRIPTION

[0071] In order to make the application, technical scheme and advantages of the present invention more clear, the present invention is described in detail in conjunction with specific embodiments. It should be understood that the embodiments are only used to illustrate the present invention, but not to limit the protection scope of the present invention. All simple improvements to the preparation method of the present invention under the premise of the concept of the present invention belong to the protection scope of the present invention.

[0072] Example 1

[0073] A preparation method of a colored sand type seam beautifying agent, comprising the following components:

[0074] Base polymer 100g, hardening resin XT120 100g, UV absorber Tinuvin326 2g, light stabilizer Tinuvin770 2g, ROCIMA TM 342 8g, titanium dioxide Ti-Pure R-706 12g, carbon black slurry 0.5g, Omyabond120 160g, natural colored sand 400g, dehydrating agent vinyl trimethoxy silane 8g, curing accelerator γ-aminopropyl trimethoxy silane 8g, 1,8-diazabicyclo [5.4.0] undec-7-ene 0.5g;

[0075] ROCIMA TM 342, now acquired by LANXESS, is a product of LANXESS.

[0076] (This formula uses activated calcium carbonate to increase thixotropy. Calcium carbonate and acid will react with each other, so this formula is not suitable for use in an acidic environment)

[0077] It comprises the following preparation steps:

[0078] s1. After the dual planetary mixer is started, the base polymer, hardening resin, UV absorber, light stabilizer, mildew inhibitor, titanium dioxide, and carbon black slurry are fully stirred in proportion; the temperature is controlled at 50°C to 55°C, and the temperature is kept for 30 minutes to prepare a premix;

[0079] s2. Select activated calcium carbonate and natural colored sand, dehydrate them at 120℃ for 12h~24h, measure the moisture content to be less than 2000PPM, and then cool them to below 50℃ for use;

[0080] s3. The natural colored sand and activated calcium carbonate treated in step s2 are added to the premix obtained in step s1, the vacuum is turned on, the vacuum degree is above -0.090, high-speed stirring is performed for 40min to 1h, the material temperature is controlled below 55 ° C, and stirred evenly;

[0081] s4. The material temperature is reduced to 40°C-45°C, a dehydrating agent is added, and the mixture is stirred for 15 minutes. A curing accelerator is added, and the mixture is stirred for 15 minutes. After vacuum degassing for 15 minutes, the material is filled and discharged to prepare a colored sand type seam beautifying agent.

[0082] Embodiment 2:

[0083] A preparation method of a colored sand type seam beautifying agent, comprising the following components:

[0084] Base polymer 100g, hardening resin XT120 100g, UV absorber Tinuvin326 2g, light stabilizer Tinuvin770 2g, ROCIMA TM 342 8g, titanium dioxide Ti-PureR-706 8g, thixotropic agent (polyamide wax) Arkema SLT12g, carbon black slurry 0.5g, natural colored sand 500g, fumed silica 20g, dehydrating agent vinyl trimethoxy silane 8g, curing accelerator γ-aminopropyl trimethoxy silane 8g, 1,8-diazabicyclo [5.4.0] undec-7-ene 0.5g;

[0085] It comprises the following preparation steps:

[0086] s1. After the dual planetary mixer is started, the base polymer, hardening resin, UV absorber, light stabilizer, mildew inhibitor, titanium dioxide, thixotropic agent, and carbon black slurry are fully mixed in proportion; the temperature is controlled at 50°C to 55°C, and the temperature is kept for 30 minutes to fully activate the thixotropic agent (polyamide wax) to prepare a premix;

[0087] s2. Select natural colored sand and fumed silica, dehydrate them at 120°C for 12h to 24h, measure the moisture content to be less than 2000PPM, and then cool them to below 50°C for use;

[0088] s3. The natural colored sand and fumed silica after treatment in step s2 are added to the premix obtained in step s1, vacuum is turned on, the vacuum degree is above -0.090, high-speed stirring is performed for 40min to 1h, the material temperature is controlled below 55 ° C, and stirred evenly;

[0089] s4. The material temperature is reduced to 40°C-45°C, a dehydrating agent is added, and the mixture is stirred for 15 minutes. A curing accelerator is added, and the mixture is stirred for 15 minutes. After vacuum degassing for 15 minutes, the material is filled and discharged to prepare a colored sand type seam beautifying agent.

[0090] (Example 2 uses polyamide wax and fumed silica as a catalytic enhancer, eliminates active calcium carbonate, and has no acid-reactive substances, so it has excellent acid resistance and can be used under acidic conditions, but the cost will be higher than Example 1.)

[0091] The preparation of the base polymer described in Examples 1 and 2 is as follows:

[0092] It includes the following components in weight percentage:

[0093] Silane modified polyether XB502 86.95%, lithium aluminum hydride 2.61%, trifluoroacetic acid 9.57%; Micron No. 8 wax 0.87%; the sum of all components is 100%;

[0094] It comprises the following preparation steps:

[0095] S1. Select silane-modified polyether in proportion, add it to a three-necked flask, slowly add lithium aluminum hydride, stir while adding, raise the temperature to 70°C, react for 4h, and after sufficient reaction, obtain the first intermediate;

[0096] S2. The temperature was maintained at 70°C, trifluoroacetic acid was added dropwise, stirring was performed, and the reaction was carried out for 2 hours to obtain the second step intermediate;

[0097] S3. Add release wax soluble in polyether to the intermediate in the second step, raise the temperature to 100-105°C, stir while adding, turn on the vacuum, the vacuum degree must reach above -0.095, dissolve the release wax at high temperature and remove water at high temperature for 1 hour, take samples to test the moisture content, the moisture content is less than 200PPM, cool to room temperature to obtain the base polymer.

[0098] Comparative Example 1: Using epoxy seam sealant on the market;

[0099] Nippon paint three-in-one seam sealant is preferred;

[0100] Type: Epoxy caulking agent;

[0101] Product Features:

[0102] 1. Green and environmentally friendly, excellent quality;

[0103] 2. Waterproof and stain-resistant, solid and strong;

[0104] 3. Strong bonding, durable and firm;

[0105] 4. Rich colors and delicate texture.

[0106] Comparative Example 2: Using commercially available silane-modified polyether seam beautifying agent;

[0107] The best choice is the ceramic beauty edge glue, which can beautify the edge, beautify the seam, bond and seal 4 in 1;

[0108] Features:

[0109] 1. Environmentally friendly mildew-proof sealing material that does not contain methanol, heavy metals, ketones and other harmful substances;

[0110] 2. Excellent bonding performance to polished stone, ceramic surface, cement surface, aluminum alloy and stainless steel;

[0111] 3. Wear-resistant and oil-resistant;

[0112] 4. High and low temperature resistance, no shrinkage and no discoloration;

[0113] 5. Excellent extrusion performance;

[0114] 6. In an environment of -20℃ to 100℃, it will not shrink, crack, collapse or volatilize, and its original physical properties will remain unchanged.

[0115] Table 1 Comparison of test results of the embodiments of the present invention and the comparative examples

[0116]

[0117] The above test results show that compared with the epoxy caulking agent in comparative example 1, embodiment 1 and embodiment 2 of the present invention have obvious advantages in yellowing resistance and artificial weathering aging. The epoxy caulking agent is seriously yellowed. Embodiment 1 and embodiment 2 have yellowing resistance and artificial weathering aging / grade. After the China National Inspection, they can reach the highest level of grade 0. They are better than epoxy caulking agents in environmental protection and environmental friendliness. Not only is the VOC amount lower, but it also meets the French A+ environmental protection requirements. In terms of mildew resistance, embodiment 1 and embodiment 2 have longer-lasting mildew resistance, and their mildew resistance grade reaches 3 times more than grade 0. At present, most of the epoxy caulking agents of various merchants have reached grade 0, and it is difficult to achieve high-fold mildew resistance. In terms of durability and high and low temperature resistance, embodiment 1 and embodiment 2 have obvious advantages. The caulking agent of the present invention is slightly lower than the epoxy caulking agent in hardness, and is better than the epoxy caulking agent in other important indicators. It will be more environmentally friendly in practical applications, and the caulking has a longer-lasting and beautiful effect.

[0118] Compared with other silicon-modified polyether caulking agents on the market in Comparative Example 2, the present invention has higher hardness, which is in line with the characteristic of caulking agents being as hard as porcelain; in terms of construction performance, other types of silane-modified polyether caulking agents must be waxed during construction, which greatly increases the inconvenience of construction. At the same time, after waxing, it is still difficult to remove the glue. In actual applications, caulking workers will hardly choose this type of caulking agent for construction; the improvement in the glue removal performance of the present invention greatly improves the shortcomings of silane-modified polyether caulking agents in construction.

[0119] To sum up, the above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the disclosed technical content are regarded as equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

[0120] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The experimental methods without specific conditions in the present invention are usually carried out under conventional conditions or conditions recommended by the manufacturer.

[0122] Unless otherwise stated, the various optimization technical solutions in the present invention can be combined with each other.

[0123] Unless otherwise indicated, percentages and parts are by weight.

[0124] Experimental methods without specific conditions specified in the instructions and examples are usually carried out under conventional conditions or conditions recommended by the manufacturers.

[0125] Unless otherwise defined, all professional and scientific terms used herein have the same meaning as those familiar to those skilled in the art. In addition, any method and material similar or equivalent to the described content can be applied to the method of the present invention.

Claims

1. A method for preparing a colored sand type seam beautifying agent, characterized in that: It comprises the following preparation steps: A. Preparation of base polymer: It includes the following components in weight percentage: Silane modified polyether 70% to 90%, lithium aluminum hydride 1% to 9%, trifluoroacetic acid 4% to 20%; mold release wax soluble in polyether 0.5% to 1%; the sum of all components is 100%; It comprises the following preparation steps: S1. Select silane-modified polyether in proportion, add it to a three-necked flask, slowly add lithium aluminum hydride, stir while adding, raise the temperature to 70-80°C, react for 2-6h, and after sufficient reaction, obtain the first intermediate; S2. The temperature is maintained at 60-80°C, trifluoroacetic acid is added dropwise, stirring, and the reaction is carried out for 2-3 hours to obtain the second step intermediate; S3. Add a release wax soluble in polyether to the intermediate in the second step, raise the temperature to 100-105°C, stir while adding, turn on the vacuum, the vacuum degree must reach above -0.095, dissolve the release wax at high temperature and remove water at high temperature for 1 hour, take a sample to test the moisture content, the moisture content is less than 200PPM, and cool to room temperature to obtain a base polymer; B. Preparation of colored sand type seam beautifying agent: It includes the following components in weight percentage: Base polymer 10-35%, hardening resin 5-20%, UV absorber 0.25-1%, light stabilizer 0.25-1%, mildew inhibitor 0.5-1%, thixotropic agent 0-5%, titanium dioxide 1-1.5%, color paste 0.01-0.5%, active calcium carbonate 0-20%, natural colored sand 30-65%, fumed silica 0-5%, dehydrating agent 1-1.5%, curing accelerator 0.5-2%, the sum of all components is 100%; The hardening resin has a viscosity of 100 to 200 mm 2 / s, a linear silane-modified polyether resin with polyurethane mechanical properties, containing 2 or more reactive groups that can serve as crosslinking points; It comprises the following preparation steps: s1. After the dual planetary mixer is started, the base polymer, hardening resin, UV absorber, light stabilizer, mildew inhibitor, thixotropic agent, titanium dioxide and color paste are fully mixed according to the proportion; the temperature is controlled at 50 ℃ ~ 55 ℃, 30min, and the premix is ​​prepared; s2. Select activated calcium carbonate, natural colored sand, and fumed silica, dehydrate at 120°C for 12h to 24h, measure the moisture content to be less than 2000PPM, and then cool to below 50°C for use; s3. The natural colored sand, activated calcium carbonate and fumed silica after the treatment in step s2 are added to the premix obtained in step s1, the vacuum is turned on, the vacuum degree is above -0.090, high-speed stirring is performed for 40min to 1h, and the material temperature is controlled below 55°C; s4. The material temperature is reduced to 40°C-45°C, a dehydrating agent is added, and the mixture is stirred for 15 minutes; a curing accelerator is added, and the mixture is stirred for 15 minutes; after vacuum degassing for 15 minutes, the material is filled and discharged to prepare a colored sand type seam beautifying agent.

2. The method for preparing the colored sand type seam beautifying agent according to claim 1, characterized in that: The high-temperature dehydration in step S3 uses a high-temperature vacuum dehydration method for silane-modified polyethers that do not self-crosslink at high temperatures; for silane-modified polyethers that self-crosslink at high temperatures, Borchers' dehydrating agent TI is used for titration. The overall requirement is to control the moisture content of the base polymer below 200 PPM.

3. The method for preparing the colored sand type seam beautifying agent according to claim 1, characterized in that: The silane-modified polyether is one or a combination of Wacker XB502, Wacker XT50, XT55, STP-E15, and STP-E35.

4. The method for preparing the colored sand type seam beautifying agent according to claim 1, characterized in that: The demoulding wax is one or a combination of carnauba wax and Micron No. 8 wax.

5. The method for preparing the colored sand type seam beautifying agent according to claim 1, characterized in that: It includes one or a combination of the following features: The hardening resin is Wacker XT120; The UV absorber is benzotriazole; The light stabilizer is a hindered amine type; The mildew inhibitor is an isothiazolinone derivative; The thixotropic agent is one or a combination of polyamide wax and fumed silica; The activated calcium carbonate has a water content of less than 2000 PPM and a particle size of 300 nm; The natural colored sand is one or a combination of 150 mesh, 200 mesh, 220 mesh, 320 mesh, and 400 mesh colored sand; The dehydrating agent is one or a combination of vinyl trimethoxy silane and vinyl triethoxy silane; The curing agent accelerator is one or a combination of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, and 1,8-diazabicyclo[5.4.0]undec-7-ene.

6. The method for preparing the colored sand type seam beautifying agent according to claim 5, characterized in that: The UV absorber is one or a combination of BASF Tinuvin 326, Tinuvin 328, Tinuvin 928 and Tinuvin P; The light stabilizer is one or a combination of BASF Tinuvin 770, Tinuvin 292, Tinuvin 249; The thixotropic agent is one or a combination of Arkema SLT, SLX, Wacker H18, and Cabot TS-720; The activated calcium carbonate is Omyabond 120.

7. A colored sand type seam beautifying agent, characterized in that: The colored sand type seam beautifying agent is prepared according to the preparation method of claim 1.

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