A stretch-resistant caulking material, its preparation method and application

Abstract

The present invention discloses a stretch-resistant caulking material, a preparation method thereof and an application. The stretch-resistant caulking material comprises the following components by mass fraction: 4% - 25% of a thermoplastic resin; 45% - 65% of a mineral oil; 4% - 25% of a composite polymer; 0.8% - 8.0% of a reinforcing agent; and 2% - 7% of a first chemical agent. The stretch-resistant caulking material conforms to the structures and construction characteristics of existing road cracks and reserved cracks in structural structures, has excellent high-temperature performance, low-temperature performance and deformation recovery ability, has a relatively high softening point, strong adhesion and high low-temperature tensile rate and low-temperature ductility, and can effectively fill and repair road cracks and reserved cracks in structural structures.

Description

Technical Field

[0001] The present invention relates to a stretch-resistant caulking material, a preparation method thereof, and an application thereof, and particularly to a stretch-resistant caulking material for filling and repairing road cracks and reserved cracks in structural structures, a preparation method thereof, and an application thereof. Background Art

[0002] In cold regions, frost heaving occurs on road surfaces. The reason is related to the entry of external water into the roadbed. Poor sealing at expansion joints and failure to repair road cracks in a timely manner are both contributing factors. The filling and repair of these road cracks and reserved structural cracks usually use various sealing materials, relying on the elasticity of the sealing materials to "follow" the change in crack width caused by temperature and load, and aiming to achieve the goal by improving a series of properties such as the strength, extensibility, and fatigue resistance of the materials. However, unfortunately, the actual use effects of these materials are not satisfactory so far. There are many reasons. One is the material factor. These products have good properties themselves, but have high requirements for construction environmental conditions. For example, the concrete must be dry and clean without floating slurry; or a primer or surface treatment must be added, otherwise interface cracking will occur due to poor adhesion; the environmental temperature cannot be too high or too low, otherwise it will affect the curing of the resin, and further affect the performance of the resin matrix and the adhesion performance, etc. The second is the construction factor. During on-site construction, it is too casual, the surface treatment is not good or not done at all, and water is carried during the operation, resulting in poor curing of the sealant, poor adhesion, and difficulty in realizing the material performance. There are also many other factors, making the actual sealing effect of the cracks poor.

[0003] CN109320979B discloses a preparation method and an application of a resin asphalt emulsion for improving the adhesion between acidic aggregates and asphalt. In this method, a coupling agent, an inorganic filler, and water are mixed, and an inorganic filler dispersion is obtained by ultrasonic dispersion. Then, a waterborne epoxy resin, a waterborne epoxy curing agent, and emulsified asphalt are added and stirred to obtain a resin asphalt emulsion. Then, the resin asphalt emulsion is sprayed onto the surface of the acidic aggregates, and the surface-treated aggregates can be obtained after drying. The preparation process adopted by this method is complex, the operation is cumbersome during the construction process, and its popularization and application have great limitations.

[0004] CN110183864A discloses a special asphalt for improving the adhesion between aggregates and asphalt and a preparation method thereof. In this method, matrix asphalt, amino silicone resin, maleic anhydride, and stearate are mixed, ground by a colloid mill, and then developed in a development tank to obtain the product. The product prepared by this method has high brittleness, poor flexibility, and is prone to brittle fracture at low temperatures. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a stretch-resistant caulking material, a preparation method thereof, and an application thereof. The stretch-resistant caulking material conforms to the structure and construction characteristics of existing road joints and reserved joints in the structure, has excellent high-temperature performance, low-temperature performance, and deformation recovery ability, has a relatively high softening point, strong adhesion, high low-temperature tensile rate, and low-temperature ductility, and can effectively fill and repair road joints and reserved joints in the structure.

[0006] The present invention provides a stretch-resistant caulking material, and the material comprises the following components in terms of mass fraction:

[0007] Thermoplastic resin: 4% - 25%, preferably 8% - 22%;

[0008] Mineral oil: 45% - 65%, preferably 50% - 62%;

[0009] Composite polymer: 4% - 25%, preferably 15% - 22%;

[0010] Reinforcing agent: 0.8% - 8.0%, preferably 2% - 6%;

[0011] First compounding agent: 2% - 7%, preferably 3% - 5%.

[0012] Furthermore, the composite polymer comprises a natural polymer, a synthetic polymer, and a second compounding agent.

[0013] Furthermore, in the composite polymer, the mass fractions of the natural polymer, the synthetic polymer, and the second compounding agent are respectively 15% - 55%, 20% - 75%, and 0.1% - 25%.

[0014] Furthermore, the natural polymer in the composite polymer is preferably natural rubber, the synthetic polymer is preferably synthetic rubber, and the molecular weight of the synthetic rubber is preferably 200000 - 400000.

[0015] Furthermore, the second compounding agent in the composite polymer is a second vulcanizing agent, a second vulcanization accelerator, and a second antioxidant. The second vulcanizing agent is preferably one or more of elemental sulfur, sulfide, sulfur monochloride, selenium, tellurium, and isocyanate. The second vulcanization accelerator is preferably one or more of aldehyde amines, guanidines, thiurams, thiazoles, dithiocarbamates, xanthates, thioureas, sulfenamides, and metal oxides. The second antioxidant is preferably one or more of monophenols, bisphenols, polyphenols, heterocyclic antioxidants, and phosphite antioxidants.

[0016] Furthermore, the mass ratio of the second vulcanizing agent, the second vulcanization accelerator, and the second antioxidant in the composite polymer is (0.7 - 1.5):(0.2 - 1.1):(0.3 - 1.2).

[0017] Furthermore, the chromaticity of the thermoplastic resin is 6 to 16, and it is preferably an alicyclic resin.

[0018] Furthermore, the mineral oil is a mineral oil produced from natural petroleum, which is a mixture of cycloalkanes and paraffins. The saturated content of the mineral oil is not more than 35%, preferably 15% to 30% (by mass). The viscosity of the mineral oil at 100°C is 50 to 60,000 mm 2 / s, pour point less than 30℃, and mass content of condensed ring aromatic hydrocarbons less than 5%.

[0019] Furthermore, the reinforcing agent is preferably one or more of glass fiber, asbestos, boron fiber, ceramic fiber, aramid fiber, and stainless steel fiber.

[0020] Furthermore, the first compound comprises a first vulcanizing agent, a first vulcanization accelerator and a first antioxidant, wherein the mass ratio of the first vulcanizing agent, the first vulcanization accelerator and the first antioxidant is 1:(0.5-1.0):(0.1-1.5).

[0021] Furthermore, in the first compound, the first vulcanizing agent is preferably one or more of elemental sulfur, sulfide, sulfur monochloride, selenium, tellurium, and isocyanate; the first vulcanization accelerator is preferably one or more of aldehyde amines, guanidines, thiurams, thiazoles, dithiocarbamates, xanthates, thioureas, sulfenamides, and metal oxides; and the first antioxidant is preferably one or more of monophenols, bisphenols, polyphenols, heterocyclic antioxidants, and phosphite antioxidants.

[0022] A second aspect of the present invention provides a method for preparing the above-mentioned stretch-resistant caulking material, comprising the following steps:

[0023] (1) preparing a composite polymer;

[0024] (2) adding a thermoplastic resin into mineral oil for dissolution, then adding a composite polymer for swelling, and forming a binder through high-speed shearing;

[0025] (3) Add the first antioxidant to the binder described in step (2), then perform a first stirring, then perform high-speed shearing, then add the first vulcanizing agent and the first vulcanization accelerator, perform a second stirring, then add the reinforcing agent, perform a third stirring, and then perform high-speed shearing to obtain the tensile-resistant caulking material.

[0026] Furthermore, the method for preparing the composite polymer described in step (1) comprises the following steps:

[0027] The natural polymer and the synthetic polymer are plasticized together, and then a second compound is added and mixed. When the materials are evenly dispersed and have suitable plasticity, the polymer is obtained.

[0028] Further, in the preparation method of the composite polymer described in step (1), preferably, the mass fractions of the natural polymer, the synthetic polymer, and the second compounding agent are 15% - 55%, 20% - 75%, and 0.1% - 25% respectively.

[0029] Further, in the preparation method of the composite polymer described in step (1), before being mixed with the synthetic polymer, the natural polymer can be pre - plastified. The plastification can adopt conventional techniques in the art, such as using an open mill, an internal mixer, and an extruder for plastification. The plastification temperature is 120°C - 160°C, the time is 5 min - 30 min, and the speed ratio is 1.0 - 1.3.

[0030] Further, the second compounding agent in the composite polymer is a second vulcanizing agent, a second vulcanization accelerator, and a second antioxidant.

[0031] Further, in the preparation method of the composite polymer described in step (1), the mass ratio of the second compound (the second vulcanizing agent, the second vulcanization accelerator, and the second antioxidant) is (0.7 - 1.5):(0.2 - 1.1):(0.3 - 1.2).

[0032] Further, in step (2), preferably, the mass ratio of the thermoplastic resin, the mineral oil, and the composite polymer is (4% - 25%):(45% - 65%):(4% - 25%).

[0033] Further, in step (2), the melting temperature is 100°C - 160°C, and the time is 60 min - 90 min; the swelling temperature is 120°C - 180°C, and the time is 60 min - 90 min.

[0034] Further, in step (2), the rotation speed of the high - speed shearing is 1000 r / min - 10000 r / min.

[0035] Further, in step (3), the mass ratio of the first vulcanizing agent, the first vulcanization accelerator, and the first antioxidant is 1:(0.5 - 1.0):(0.1 - 1.5).

[0036] Further, in step (3), the temperature of the first stirring is 150°C - 170°C, the time is 60 min - 90 min, and the stirring speed is 50 r / min - 150 r / min.

[0037] Further, in step (3), the temperature of the second stirring is 170°C - 180°C, the time is 4 - 10 h, and the stirring speed is 300 r / min - 800 r / min.

[0038] Further, in step (3), the temperature of the third stirring is 160°C to 170°C, the time is 1 to 5 hours, and the rotation speed of the stirring is 100 r / min to 300 r / min.

[0039] The third aspect of the present invention provides an application of the stretch-resistant caulking material provided by the first aspect in existing road cracks and structural structures.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0041] (1) By adjusting the contents of the thermoplastic resin, mineral oil, and polymer and adding a chemical agent and a reinforcing agent, the stretch-resistant material of the present invention has excellent high-temperature performance, low-temperature performance, and deformation recovery ability, with a high softening point, strong adhesion, high low-temperature tensile rate, and low-temperature ductility. At the same time, it has strong deformation following ability, thus avoiding the adhesion of the binder falling off from the surface of the crack due to a large temperature difference, enabling the crack to have good waterproof performance, increasing the service life of the road, and reducing the maintenance frequency.

[0042] (2) By adjusting the contents of the natural polymer and the synthetic polymer and adding a chemical agent for plastic refining, the polymer of the present invention can remove impurities in the polymer, increase the plasticity and flexibility of the polymer, improve the tensile resistance of the polymer, and improve the anti-aging ability of the polymer. Moreover, the polymer performance can be adjusted through the process according to the actual use performance requirements.

[0043] (3) By using the natural polymer and the synthetic polymer in combination and adding a chemical agent, chemical reactions such as polymerization, crosslinking, and grafting occur between the chemical bonds of the two polymers, enabling the original short side chains on the polymer molecules to combine with the active chemical bonds on other molecules, forming a stable network colloid structure between the thermoplastic resin and the mineral oil, and making the performance of the product of the present invention more stable.

[0044] (4) The mineral oil in the present invention can enhance the flexibility of the polymer and improve the low-temperature crack resistance of the product.

[0045] (5) Since thermoplastic resins will age after being heated at high temperatures for a long time, which affects the product performance, the present invention uses mineral oil that can become liquid at about 80°C, melts the thermoplastic resin at 100°C - 160°C, and swells the polymer at 120°C - 180°C. In this way, melting and swelling can be completed quickly and fully, and the aging of the thermoplastic resin and the volatilization of the dispersed phase in the mineral oil can be avoided; the first stirring is carried out at 150°C - 170°C, which can gradually release active chemical bonds, facilitating the control of the reaction rate and smoothly completing reactions such as polymerization, crosslinking, and grafting; the second stirring is carried out at 170°C - 180°C, which can make the active groups and chemical bonds in the material system react completely, avoiding continuous influence on the material performance in the follow-up; the third stirring is carried out at 160°C - 170°C, which can make the material system more uniform and stable, avoiding adverse situations such as delamination and gelation. Detailed implementation mode

[0046] The technical solutions and effects of the present invention will be further described below through examples. The examples are implemented on the premise of the technical solutions of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following examples.

[0047] Example 1

[0048] Plasticate the natural polymer in an open mill, then co-plasticate it with the synthetic polymer, and then add the second compounding agent for mixing. When the material is uniformly dispersed and has suitable plasticity, the composite polymer is obtained. The raw material names, ratios, and models are shown in Table 1 below.

[0049] Table 1 Raw material names, ratios, and models of the composite polymer

[0050]

[0051]

[0052] Add mineral oil and thermoplastic resin to the reaction kettle, heat to 110°C, and melt them all for 30 minutes. Then add the composite polymer and stir evenly, and then carry out swelling. The swelling temperature is 140°C and the time is 60 minutes. Pass all the mixed materials through a high-shear with a rotation speed of 3000 revolutions per minute for 30 minutes, then add the first compounding agent (the first antioxidant), and carry out the first stirring for 90 minutes. After the first stirring is completed, pass all the mixed materials through a high-shear with a rotation speed of 3000 revolutions per minute for 30 minutes, and then add the first compounding agent (the first vulcanizing agent) and the first compounding agent (the first vulcanization accelerator) for the second stirring for 10 hours. After the second stirring is completed, add the reinforcing agent for the third stirring for 5 hours to obtain the stretch-resistant material. For the stretch-resistant material prepared in this example, the raw material names, ratios, and models are shown in Table 2 below, and the performance of the obtained product is shown in Table 6.

[0053] Table 2 Raw material names, ratios and models of the stretch-resistant material

[0054]

[0055] Example 2

[0056] The composite polymer is the same as that in Example 1.

[0057] Add mineral oil and thermoplastic resin into the reaction kettle, heat to 120 °C until all are melted, and the time is 30 min. Then add the composite polymer, stir evenly and carry out swelling. The swelling temperature is 140 °C and the time is 60 min. Pass all the mixed materials through a high-shear with a rotation speed of 3000 revolutions per minute for 30 min, and then add the first compounding agent (the first antioxidant) and carry out the first stirring for 90 min. After the first stirring is completed, pass all the mixed materials through a high-shear with a rotation speed of 3000 revolutions per minute for 30 min, and then add the first compounding agent (the first vulcanizing agent and the first vulcanization accelerator) and carry out the second stirring for 10 h. After the second stirring is completed, add the reinforcing agent and carry out the third stirring for 5 h to obtain the stretch-resistant material. For the stretch-resistant material prepared in this example, the raw material names, ratios and models are as shown in Table 3 below, and the performance of the obtained product is shown in Table 6.

[0058] Table 3 Raw material names, ratios and models of the stretch-resistant material

[0059]

[0060] Example 3

[0061] Plasticate the natural polymer on the open mill, then co-plasticate it with the synthetic polymer, and then add the second compounding agent for mixing. Wait until the materials are evenly dispersed and have suitable plasticity to obtain the composite polymer, and its raw material names, ratios and models are as shown in Table 4 below.

[0062] Table 4 Raw material names, ratios and models of the composite polymer

[0063]

[0064] Mineral oil and thermoplastic resin are added to a reaction kettle and heated to 130 °C until completely melted, for 30 min. Then a synthetic polymer is added and stirred evenly for swelling. The swelling temperature is 140 °C and the time is 60 min. The entire mixture is subjected to high shear at a rotational speed of 3000 revolutions per minute for 30 min, and then a first compounding agent (first antioxidant) is added for the first stirring for 90 min. After the first stirring is completed, the entire mixture is subjected to high shear at a rotational speed of 3000 revolutions per minute for 30 min, and then a first compounding agent (first vulcanizing agent and first vulcanization accelerator) is added for the second stirring for 10 h. After the second stirring is completed, a reinforcing agent is added for the third stirring for 5 h to obtain a stretch-resistant material. For the stretch-resistant material prepared in this example, the raw material names, ratios, and models are as shown in Table 5 below, and the properties of the obtained product are shown in Table 6.

[0065] Table 5 Raw material names, ratios, and models of the stretch-resistant material

[0066]

[0067] Comparative Example 1

[0068] The raw materials and methods of this Comparative Example 1 are basically the same as those of Example 1, except that: the polymer is not prepared by a composite process, but only the synthetic polymer and the natural polymer are added to the reaction kettle according to the ratio in Example 1, stirred evenly with the mineral oil and thermoplastic resin that have been melted in the reaction kettle for swelling, and the second compounding agent is not added. The properties of the obtained product are shown in Table 6. Among them, during the preparation process, since the polymer is not prepared by a composite process, after adding the first vulcanizing agent and the first vulcanization accelerator in the first compounding agent, the polymer molecules rapidly undergo grafting, crosslinking and other reactions, resulting in serious gelation phenomenon, poor stretch resistance of the product, affecting the use of the product, and poor product performance.

[0069] Comparative Example 2

[0070] The raw materials and methods of this Comparative Example 2 are basically the same as those of Example 1, except that: the first antioxidant is not added during the first stirring, and only the first vulcanizing agent is added during the second stirring without adding the first vulcanization accelerator. The properties of the obtained product are shown in Table 6. The product properties are unstable, and serious gelation will occur. The anti-flow performance of the product is poor, affecting the use of the product, and the product performance is poor.

[0071] Test Example

[0072] The materials prepared in Examples 1 - 3 and Comparative Examples 1 - 2 are tested according to the technical requirements of JT / T 589 - 2004 "Joint Sealing Materials for Cement Concrete Pavements". The test results are shown in Table 6.

[0073] Table 6 Properties of the stretch-resistant material

[0074] Product Name Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Technical Requirements Penetration, 0.1mm 88 71 79 81 84 ＜90 Elasticity (Recovery) Rate, % 83 99 99 79 75 ≥60 Flowability, mm 2 0 0 5 13 ＜2 Tensile Amount (-10°C), mm 15 16 23 7 11 ≥15

[0075] From the comparison results in Table 6, the performance of Comparative Example 1 and Comparative Example 2 does not meet the standard technical requirements. Comparative Example 1 and Comparative Example 2 are prone to flow at high temperatures, are not resistant to stretching at low temperatures, and have a short service life.

[0076] The stretch-resistant materials of Embodiments 1-3 of the present invention not only meet the standard technical requirements, but also can be used to fill various pavement reserved gaps, and have strong practicability.

[0077] Test Example 2

[0078] The tensile tests were carried out on Embodiments 1-3 and Comparative Examples 1-2 by using a universal material testing machine, and the test results are shown in Table 7. The universal material testing machine is a common instrument for material testing, and the sensor range can be selected according to the test material. The sensor range used in this test is 200 KN.

[0079] Table 7 Tensile properties of stretch-resistant materials

[0080] Product Name Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Tensile Strength, MPa 138 153 118 256 249 Peeling Area Ratio, % Approximately 10 Approximately 7 Approximately 2 Approximately 50 Approximately 50

[0081] From the comparison results in Table 7, since the tensile strength of Embodiments 1-3 is relatively small, it indicates that the cohesive force therein is relatively small, the material has better followability and adhesiveness, and has better peel resistance, and it is not easy to appear peeling and fracture phenomena.

Claims

1. A stretch-resistant caulking material, the material comprising the following components by mass fraction: Thermoplastic resin: 4% - 25%; Mineral oil: 45% - 65%; Composite polymer: 4% - 25%; Reinforcing agent: 0.8% - 8.0%; First compounding agent: 2% - 7%; Among them, The first compounding agent is a first vulcanizing agent, a first vulcanization accelerator, and a first antioxidant; Wherein, the composite polymer comprises a natural polymer, a synthetic polymer, and a second compounding agent; The natural polymer in the composite polymer is natural rubber, and the synthetic polymer is synthetic rubber; the second compounding agent is a second vulcanizing agent, a second vulcanization accelerator, and a second antioxidant; The preparation method of the composite polymer comprises the following steps: Plasticize the natural polymer and the synthetic polymer together, and then add the second compounding agent for mixing. Wait until the material is evenly dispersed and has suitable plasticity to obtain the composite polymer.

2. The stretch-resistant caulking material according to claim 1, characterized in that, In the composite polymer, the mass fractions of the natural polymer, the synthetic polymer, and the second compounding agent are 15% - 55%, 20% - 75%, and 0.1% - 25% respectively.

3. The stretch-resistant caulking material according to claim 1, characterized in that, The mass ratio of the second vulcanizing agent, the second vulcanization accelerator, and the second antioxidant is (0.7 - 1.5):(0.2 - 1.1):(0.3 - 1.2); the second vulcanizing agent is one or more of elemental sulfur, sulfide, sulfur monochloride, selenium, tellurium, isocyanate, etc., the second vulcanization accelerator is one or more of aldehyde amines, guanidines, thiurams, thiazoles, dithiocarbamates, xanthates, thioureas, sulfenamides, metal oxides, etc., and the second antioxidant is one or more of monophenols, bisphenols, polyphenols, heterocyclic antioxidants, phosphite antioxidants, etc.

4. The stretch-resistant caulking material according to claim 1, characterized in that, The chromaticity of the thermoplastic resin is 6 - 16.

5. The stretch-resistant caulking material according to claim 1, wherein, The thermoplastic resin is an alicyclic resin.

6. The stretch-resistant caulking material according to claim 1, wherein The mineral oil is a mineral oil produced from natural petroleum and is a mixture of naphthenes and paraffins; the mass content of the saturated fraction of the mineral oil is not more than 35%; the viscosity of the mineral oil at 100 °C is 50 to 60,000 mm 2 / s, the pour point is less than 30 °C, and the mass content of polynuclear aromatic hydrocarbons is less than 5%.

7. The stretch-resistant caulking material according to claim 1, wherein The saturated fraction mass content of the mineral oil is 15% - 30%.

8. The stretch-resistant caulking material according to claim 1, characterized in that, The reinforcing agent is one or more of glass fiber, asbestos, boron fiber, ceramic fiber, aramid fiber, stainless steel fiber, etc.

9. The stretch-resistant caulking material according to claim 1, characterized in that, The mass ratio of the first vulcanizing agent, the first vulcanization accelerator, and the first antioxidant is 1:(0.5 - 1.0):(0.1 - 1.5).

10. The stretch-resistant caulking material according to claim 1, characterized in that, In the first compounding agent, the first vulcanizing agent is one or more of elemental sulfur, sulfide, sulfur monochloride, selenium, tellurium, isocyanate, etc., the first vulcanization accelerator is one or more of aldehyde amines, guanidines, thiurams, thiazoles, dithiocarbamates, xanthates, thioureas, sulfenamides, metal oxides, etc., and the first antioxidant is one or more of monophenols, bisphenols, polyphenols, heterocyclic antioxidants, phosphite antioxidants, etc.

11. The preparation method of the stretch-resistant caulking material according to any one of claims 1 - 10, comprising the following steps: (1) Prepare the composite polymer; (2) Add the thermoplastic resin to the mineral oil for melting, then add the composite polymer for swelling, and form a binder through high-speed shearing; (3) Add the first antioxidant to the binder described in step (2), then conduct the first stirring, followed by high-speed shearing. Then add the first vulcanizing agent and the first vulcanization accelerator, conduct the second stirring, then add the reinforcing agent, conduct the third stirring, and then perform high-speed shearing to obtain the stretch-resistant caulking material.

12. The preparation method according to claim 11, wherein The preparation method of the composite polymer described in step (1) includes the following steps: Plasticize the natural polymer and the synthetic polymer together, and then add the second compounding agent for kneading. Wait until the material is evenly dispersed and has suitable plasticity to obtain the composite polymer.

13. The preparation method according to claim 12, characterized in that, In the composite polymer, the mass fractions of the natural polymer, the synthetic polymer, and the second compounding agent are 15% - 55%, 20% - 75%, and 0.1% - 25% respectively; the second compounding agent in the composite polymer is the second vulcanizing agent, the second vulcanization accelerator, and the second antioxidant; in the preparation method of the composite polymer described in step (1), the mass ratio of the second vulcanizing agent, the second vulcanization accelerator, and the second antioxidant is (0.7 - 1.5):(0.2 - 1.1):(0.3 - 1.2).

14. The preparation method according to claim 11, characterized in that, In step (2), the mass ratio of the thermoplastic resin, the mineral oil, and the composite polymer is (4% - 25%):(45% - 65%):(4% - 25%); the melting temperature is 100°C - 160°C, and the time is 60 min - 90 min; the swelling temperature is 120°C - 180°C, and the time is 60 min - 90 min.

15. The preparation method according to claim 11, wherein, In step (3), the temperature of the first stirring is 150°C - 170°C, the time is 60 min - 90 min, and the stirring speed is 50 r / min - 150 r / min; the temperature of the second stirring is 170°C - 180°C, the time is 4 - 10 h, and the stirring speed is 300 r / min - 800 r / min; the temperature of the third stirring is 160°C - 170°C, the time is 1 - 5 h, and the stirring speed is 100 r / min - 300 r / min.

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