A magnetic expansion self-tightening anchor material and its preparation method

Abstract

This application proposes a magneto-expandable self-tightening anchor material and its preparation method, comprising the following components by weight: 90-100 parts anchor matrix monomer material, 1 part initiator, 5-8 parts anchor matrix crosslinking agent, 1-2 parts anchor matrix crosslinking promoter, 1-3 parts reinforcing agent, 20-30 parts magnetic molecules, and 3-5 parts interface modifier. The self-tightening anchor material provided by this application only requires the application of an external magnetic field to achieve self-expansion and self-tightening. The addition of an anchoring agent in a random manner reduces the number of steps, reduces costs, and achieves an outstanding reinforcement effect. This application also proposes a preparation method for the self-tightening anchor material, which has the characteristics of simple process, low cost, and easy promotion and application.

Description

Technical Field

[0001] The present application relates to the technical field of new anchor rod materials, and in particular to a magneto-expansion self-tightening anchor rod material and a preparation method thereof. Background Art

[0002] As the depth of coal mining increases, the surrounding rock of coal mine tunnels undergoes continuous expansion deformation and sustained deformation due to deep wells, looseness, crushing, and impact. Anchor support is an effective means to solve the problem of tunnel deformation. Anchor support needs to work together with anchors and anchoring agents. Anchoring agents enhance adhesion by chemically reacting with the base material. Anchoring agents can also enhance adhesion through physical action, by generating friction with the base material or relying on physical structures (such as protrusions, grooves, or mesh structures) to increase adhesion. The use of anchors and anchoring agents has effectively improved the integrity and stability of the tunnel surrounding rock, and has achieved good control effects. However, in the use of anchors and anchoring agents, anchoring agents require additional processes, which increases the labor intensity of workers and seriously affects the application of anchor support. Summary of the Invention

[0003] This application aims to address, at least to some extent, one of the technical problems in the related art. This application proposes a magnetically induced expansion self-tightening anchor material and a preparation method thereof, wherein the preparation method is characterized by simplicity, low cost, and ease of application. The self-tightening anchor material provided in this application achieves self-expansion and self-tightening simply by applying an external magnetic field, eliminating the need for the addition of an additional anchoring agent, thus reducing process steps, lowering costs, and achieving an excellent reinforcement effect.

[0004] According to an embodiment of the first aspect of the present application, a magneto-expandable self-tightening anchor material is proposed, comprising the following components in parts by mass: 90-100 parts of an anchor matrix monomer material, 1 part of an initiator, 5-8 parts of an anchor matrix cross-linking agent, 1-2 parts of an anchor matrix cross-linking promoter, 1-3 parts of a reinforcing agent, 20-30 parts of magnetic molecules, and 3-5 parts of an interface modifier.

[0005] In some embodiments, the anchor matrix monomer material includes butadiene, clethodim, methyl 2,4-pentadienoate, and 2-ethyl-1,3-butadiene in a mass ratio of 1:3:2:2.

[0006] In some embodiments, the initiator comprises benzoyl peroxide.

[0007] In some embodiments, the anchor matrix crosslinking agent includes a 2,5-mercapto-1,3,4-thiadiazole-sulfur dichloride polymer and a zinc propylene bisdithiocarbamate polymer in a mass ratio of 6:1.

[0008] In some embodiments, the anchor matrix cross-linking promoter includes 5-[(3-methylthiazolidine-2-ylidene)ethylidene]-4-oxo-2-thioketothiazolidine-3-acetic acid and 5-[1-methyl-2-(3-methylthiazolidine-2-ylidene)ethylidene]-4-oxo-2-thioketothiazolidine-3-acetic acid in a mass ratio of 5:1.

[0009] In some embodiments, the reinforcing agent includes 1,3,5,7,9,11,14-heptacyclohexyltricyclo[7.3.3.15,11]heptasiloxane-3,7,14-triol and N-phenylamino-cage polysilsesquioxane in a mass ratio of 1:1.

[0010] In some embodiments, the magnetic molecules include ferrocenecarboxaldehyde, ferroceneacetylene, hydroxymethylferrocene, and ferrocenecarboxylic acid in a mass ratio of 1:1:4:2.

[0011] In some embodiments, the interfacial modifier includes octylphenoxypolyethoxyethyl phosphate and perfluorooctanesulfonic acid amine in a mass ratio of 3:1.

[0012] According to an embodiment of the second aspect of the present application, a method for preparing a magneto-expansion self-tightening anchor material is provided, comprising the following steps:

[0013] Mixing the anchor matrix monomer material, the reinforcing agent, the magnetic molecules, and the interface modifier according to stoichiometric ratio to obtain a mixed matrix material;

[0014] Adding an initiator, an anchor matrix crosslinking agent, and an anchor matrix crosslinking accelerator to the mixed matrix material according to stoichiometric amounts and mixing them uniformly to obtain a mixture A;

[0015] The mixed material A is heated and melted to carry out a polymerization reaction; the melted slurry is injected into a mold and heated to 150-180° C. to carry out a cross-linking reaction to obtain the self-tightening anchor material described in any of the above embodiments.

[0016] In some embodiments, the mixture A is heated to 100-120°C to undergo polymerization; the melted slurry is heated to 25-30W / cm 2 Ultrasonic heating.

[0017] This application uses an olefin containing multiple carbon-carbon double bonds as the anchor matrix material, to which a magneto-expandable material is added. This material then undergoes polymerization and cross-linking reactions under the action of an initiator, an anchor matrix cross-linking agent, and an anchor matrix cross-linking accelerator to produce a magneto-expandable self-tightening anchor material. Ultimately, this material is developed for widespread application, featuring a simple preparation method, low cost, and outstanding reinforcement properties.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is a flow chart of a method for preparing a self-tightening anchor material according to one embodiment of the present application. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present application and are not to be construed as limiting the present application. On the contrary, this application includes all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0022] " range " disclosed in the present application is limited in the form of lower limit and upper limit, and given range is limited by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundary of special range. The scope limited in this way can be to include end value or not include end value, and can be arbitrarily combined, that is, any lower limit can form a range with any upper limit combination. For example, if the scope of 60-120 and 80-110 is listed for specific parameters, it is understood that the scope of 60-110 and 80-120 is also expected. In addition, if the minimum range value 1 and 2 are listed, and if the maximum range value 3,4 and 5 are listed, then the following range can all be expected: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In this application, unless otherwise specified, the numerical range " ab " represents the abbreviation of any real number combination between a and b, wherein a and b are all real numbers. For example, a numerical range of "0-5" indicates that all real numbers between "0-5" are listed herein, and "0-5" is simply an abbreviation for these numerical combinations. Furthermore, when a parameter is expressed as an integer ≥ 2, this is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0023] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0024] To achieve the above-mentioned purpose, according to an embodiment of the first aspect of the present application, a magneto-expansive self-tightening anchor material is proposed, comprising the following components in parts by mass: 90-100 parts of anchor matrix monomer material, 1 part of initiator, 5-8 parts of anchor matrix crosslinking agent, 1-2 parts of anchor matrix crosslinking promoter, 1-3 parts of enhancer, 20-30 parts of magnetic molecules, and 3-5 parts of interface modifier.

[0025] In this embodiment, the self-tightening anchor material includes 90-100 parts by weight of an anchor matrix monomer material, wherein the anchor matrix monomer material includes butadiene (CAS: 106-99-0), clethodim (CAS: 99129-21-2), methyl 2,4-pentadienoate (CAS: 1515-75-9), and 2-ethyl-1,3-butadiene (CAS: 3404-63-5) in a mass ratio of 1:3:2:2. In some embodiments, the anchor matrix monomer material comprises 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or 100 parts by weight. If the anchor matrix monomer material comprises a smaller amount, such as less than 90 parts, the self-tightening anchor material has a low molecular weight and insufficient mechanical strength. If the number of monomer materials in the anchor rod matrix is ​​large, such as greater than 100 parts, there will be a large amount of residual monomers that have not been polymerized, which will affect the mechanical strength of the self-tightening anchor rod material.

[0026] In this embodiment, the self-tightening anchor material includes 1 part by mass of an initiator, and the initiator includes benzoyl peroxide.

[0027] In this embodiment, the self-tightening anchor material includes 5-8 parts by weight of an anchor matrix crosslinker, wherein the anchor matrix crosslinker comprises a 6:1 mass ratio of 2,5-mercapto-1,3,4-thiadiazole-sulfur dichloride polymer (CAS: 174672-51-6) and a propylene bisdithiocarbamate zinc polymer (CAS: 9016-72-2). In some embodiments, the anchor matrix crosslinker comprises 5, 6, 7, or 8 parts by weight. If the anchor matrix crosslinker comprises a smaller amount, such as less than 5 parts, the crosslink density of the self-tightening anchor material is low, affecting its mechanical strength and flexibility. If the anchor matrix crosslinker comprises a larger amount, such as greater than 8 parts, residual unreacted crosslinker may remain, affecting the mechanical strength of the self-tightening anchor material.

[0028] In this embodiment, the self-tightening anchor material includes 1-2 parts by weight of an anchor matrix crosslinking accelerator, wherein the anchor matrix crosslinking accelerator includes 5-[(3-methylthiazolidin-2-ylidene)ethylidene]-4-oxo-2-thioketothiazolidine-3-acetic acid (CAS: 65152-09-2) and 5-[1-methyl-2-(3-methylthiazolidin-2-ylidene)ethylidene]-4-oxo-2-thioketothiazolidine-3-acetic acid (CAS: 25651-76-7) in a mass ratio of 5:1. In some embodiments, the amount of the anchor matrix crosslinking accelerator is 1 part or 2 parts by weight. If the amount of the anchor matrix crosslinking accelerator is smaller, such as less than 1 part, the crosslinking effect is poor, which affects the tensile strength and deformation resistance of the self-tightening anchor material. If the proportion of the anchor matrix cross-linking accelerator is large, such as greater than 2 parts, the local cross-linking rate will be fast, the system will be unevenly cross-linked, and phase separation will occur, which will affect the durability of the self-tightening anchor material.

[0029] In this embodiment, the self-tightening anchor material includes 1-3 parts by weight of a reinforcing agent, wherein the reinforcing agent comprises 1,3,5,7,9,11,14-heptacyclohexyltricyclo[7.3.3.15,11]heptasiloxane-3,7,14-triol (CAS: 47904-22-3) and N-phenylamino-cage polysilsesquioxane (CAS: 1187675-16-6) in a 1:1 mass ratio. In some embodiments, the reinforcing agent is present in 1, 2, or 3 parts by weight. The reinforcing agent acts as nano-crosslinking points, enhancing the crosslinking and curing of the anchor matrix, significantly improving the mechanical strength of the anchor material. If the reinforcing agent is present in a small amount, such as less than 1 part, the reinforcing effect is poor, and the tensile strength and rigidity of the self-tightening anchor material are insufficient. If the reinforcing agent is present in a large amount, such as greater than 3 parts, the self-tightening anchor material has high rigidity, but lacks flexibility and impact resistance, making it prone to cracking during use.

[0030] In this embodiment, the self-tightening anchor material includes 20-30 parts by weight of magnetic molecules, wherein the magnetic molecules include ferrocene carboxaldehyde (CAS: 12093-10-6), ferrocene acetylene (CAS: 1271-47-2), hydroxymethylferrocene (CAS: 1273-86-5), and ferrocene carboxylic acid (CAS: 1271-42-7) in a mass ratio of 1:1:4:2. In some embodiments, the mass fraction of the magnetic molecules is 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, or the like. If the mass fraction of the magnetic molecules is small, such as less than 20, the magnetic expansion coefficient is insufficient, and the anchoring force of the self-tightening anchor material is not high. If the mass fraction of the magnetic molecules is large, such as greater than 30, the tensile strength and deformation resistance of the self-tightening anchor material are low, and the anchoring effect of the anchor is affected.

[0031] By incorporating magnetic expansion materials such as ferrocene formaldehyde, ferrocene acetylene, hydroxymethyl ferrocene, and ferrocene formic acid into the anchor rod, the rod possesses magnetostrictive properties. In field applications, self-expansion and self-tightening can be achieved simply by applying an external magnetic field, eliminating the need for additional anchoring agents, reducing process steps and costs. Furthermore, the active functional groups formaldehyde, acetylene, and formate in the magnetic molecules participate in the cross-linking reaction within the anchor rod matrix, forming a three-dimensional network structure. This increases the degree of cross-linking within the anchor rod material. The resulting cross-linking points between chains inhibit inter-polymer chain slippage, enhancing the mechanical properties of the anchor rod. This allows the anchor rod material to resist damage from external forces such as impact and collision, enhancing its impact resistance.

[0032] In this embodiment, the self-clinching anchor material includes 3-5 parts by weight of an interface modifier, wherein the interface modifier comprises octylphenoxy polyethoxyethyl phosphate (CAS: 52623-95-7) and perfluorooctane sulfonic acid amine (CAS: 29081-56-9) in a mass ratio of 3:1. In some embodiments, the interface modifier comprises 3, 4, or 5 parts by weight. If the interface modifier comprises a small amount, such as less than 3 parts, the interface between the magnetic molecules and the anchor matrix is ​​not tightly bonded, and phase separation is likely to occur, affecting the overall performance of the self-clinching anchor material. If the interface modifier comprises a large amount, such as greater than 5 parts, the tensile strength of the self-clinching anchor material is affected, and the anchor may break.

[0033] According to the embodiment of the second aspect of the present application, a method for preparing a magneto-expansion self-tightening anchor material is proposed, such as Figure 1 The following steps are involved:

[0034] S1: mixing the anchor matrix monomer material, reinforcing agent, magnetic molecules and interface modifier according to stoichiometric ratio to obtain a mixed matrix material;

[0035] S2: adding the initiator, anchor matrix crosslinking agent, and anchor matrix crosslinking accelerator to the mixed matrix material according to stoichiometric amounts and mixing them to obtain a mixture A;

[0036] S3: heating and melting the mixed material A to carry out a polymerization reaction; injecting the melted slurry into a mold and heating it to 150-180° C. to carry out a cross-linking reaction to obtain the self-tightening anchor material in any of the above embodiments.

[0037] In some embodiments, the mixture A is heated to 100-120°C to undergo polymerization; the melted slurry is heated to 25-30W / cm 2 Ultrasonic heating.

[0038] In step S1, 90-100 parts of anchor matrix monomer material, 1-3 parts of reinforcing agent, 20-30 parts of magnetic molecules, and 3-5 parts of interface modifier are weighed according to their mass fractions, and the mixture is stirred in a dry powder mixer for 30 minutes to obtain a mixed matrix material;

[0039] Step S2: Weigh 1 part of initiator, 5-8 parts of anchor matrix crosslinking agent, and 1-2 parts of anchor matrix crosslinking accelerator according to their mass parts, add them to the mixed matrix material, and stir in a dry powder mixer for 20 minutes to obtain a mixture A.

[0040] In S3, the mixture A is heated to 100-120°C to cause a polymerization reaction, wherein in some embodiments, the mixture A is heated to 100°C, 105°C, 110°C, 115°C, 118°C, and 120°C; the melted slurry is injected into a mold of a specific shape and heated at a power density of 25-30W / cm 2 Ultrasonic heating to 150-180° C. causes a cross-linking reaction to prepare the self-tightening anchor material of any of the above embodiments. In some embodiments, the cross-linking reaction temperature is 150° C., 160° C., 170° C., 180° C., etc.

[0041] To facilitate further understanding of the present application, the present invention is further described below in conjunction with the embodiments. Those skilled in the art will understand that the descriptions in the present application are only partial examples, and any other suitable specific examples are within the scope of the present application.

[0042] Example 1

[0043] This embodiment provides a magneto-expansive self-tightening anchor material, and its preparation method and specific operating parameters are as follows: 91 parts of anchor matrix monomer material, 3 parts of reinforcing agent, 30 parts of magnetic molecules, and 5 parts of interface modifier are weighed according to mass, and stirred in a dry powder mixer for 30 minutes to obtain a mixed matrix material.

[0044] 1 part of initiator, 8 parts of anchor matrix crosslinking agent, and 2 parts of anchor matrix crosslinking accelerator were weighed according to their mass parts, added to the obtained mixed matrix material, and stirred in a dry powder mixer for 20 minutes to obtain mixture A.

[0045] Mixture A is heated to 120°C to undergo polymerization, and the molten slurry is then injected into a mold of a specific shape at a power density of 28W / cm 2 Ultrasonic heating to 160° C. causes a cross-linking reaction to prepare a self-tightening anchor material.

[0046] Example 2

[0047] This embodiment is different from embodiment 1 in the following ways: 94 parts of anchor rod matrix monomer material, 1 part of reinforcing agent, 28 parts of magnetic molecules, and 5 parts of interface modifier are weighed according to mass parts, and the mixture is stirred evenly in a dry powder mixer for 30 minutes to obtain a mixed matrix material.

[0048] 1 part of initiator, 8 parts of anchor matrix crosslinking agent, and 2 parts of anchor matrix crosslinking accelerator were weighed according to their mass parts, added to the obtained mixed matrix material, and stirred in a dry powder mixer for 20 minutes to obtain mixture A.

[0049] Mixture A is heated to 120°C to undergo polymerization, and the molten slurry is then injected into a mold of a specific shape at a power density of 28W / cm 2 Ultrasonic heating to 150 ° C causes a cross-linking reaction.

[0050] Example 3

[0051] This embodiment is different from embodiment 1 in the following ways: 99 parts of anchor rod matrix monomer material, 1 part of reinforcing agent, 21 parts of magnetic molecules, and 4 parts of interface modifier are weighed according to mass parts, and stirred in a dry powder mixer for 30 minutes to obtain a mixed matrix material.

[0052] 1 part of initiator, 6 parts of anchor matrix crosslinking agent, and 2 parts of anchor matrix crosslinking accelerator were weighed according to their mass parts, added to the obtained mixed matrix material, and stirred in a dry powder mixer for 20 minutes to obtain mixture A.

[0053] Mixture A is heated to 100°C to undergo polymerization, and the molten slurry is then injected into a mold of a specific shape at a power density of 30W / cm 2 Ultrasonic heating to 180 ° C causes a cross-linking reaction.

[0054] Example 4

[0055] This embodiment is different from embodiment 1 in the following ways: 100 parts of anchor rod matrix monomer material, 2 parts of reinforcing agent, 20 parts of magnetic molecules, and 3 parts of interface modifier are weighed according to mass parts, and stirred in a dry powder mixer for 30 minutes to obtain a mixed matrix material.

[0056] 1 part of initiator, 5 parts of anchor matrix crosslinking agent, and 1 part of anchor matrix crosslinking accelerator were weighed according to their mass parts, added to the obtained mixed matrix material, and stirred in a dry powder mixer for 20 minutes to obtain mixture A.

[0057] Mixture A is heated to 100°C to undergo polymerization, and the molten slurry is then injected into a mold of a specific shape at a power density of 25W / cm 2 Ultrasonic heating to 170 ° C causes a cross-linking reaction.

[0058] Example 5

[0059] This embodiment is different from embodiment 1 in the following ways: 90 parts of anchor rod matrix monomer material, 2 parts of reinforcing agent, 29 parts of magnetic molecules, and 4 parts of interface modifier are weighed according to mass parts, and stirred in a dry powder mixer for 30 minutes to obtain a mixed matrix material.

[0060] 1 part of initiator, 7 parts of anchor matrix crosslinking agent, and 1 part of anchor matrix crosslinking accelerator were weighed according to their mass parts, added to the obtained mixed matrix material, and stirred in a dry powder mixer for 20 minutes to obtain mixture A.

[0061] Mixture A is heated to 110°C to undergo polymerization, and the molten slurry is then injected into a mold of a specific shape at a power density of 25W / cm 2 Ultrasonic heating to 150 ° C causes a cross-linking reaction.

[0062] Experimental example

[0063] The self-tightening anchor materials in each embodiment were tested after use, and the results are shown in Table 1.

[0064] Table 1 Performance results of self-tightening anchor materials in the embodiment

[0065]

[0066] It can be seen from the results in Table 1 that the self-tightening anchor material provided by the present application has an excellent magnetic expansion recovery rate and an outstanding reinforcement effect.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0068] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A magneto-expansion self-tightening anchor material, characterized in that: The invention comprises the following components in parts by mass: 90-100 parts of anchor rod matrix monomer material, 1 part of initiator, 5-8 parts of anchor rod matrix crosslinking agent, 1-2 parts of anchor rod matrix crosslinking accelerator, 1-3 parts of reinforcing agent, 20-30 parts of magnetic molecules, and 3-5 parts of interface modifier; the anchor rod matrix monomer material comprises butadiene, clethodim, methyl 2,4-pentadienoate and 2-ethyl-1,3-butadiene in a mass ratio of 1:3:2:2; the magnetic molecules comprise ferrocene formaldehyde, ferrocene acetylene, hydroxymethyl ferrocene and ferrocene carboxylic acid in a mass ratio of 1:1:4:

2.

2. The self-tightening anchor material according to claim 1, characterized in that: The initiator includes benzoyl peroxide.

3. The self-tightening anchor material according to claim 1, characterized in that: The anchor matrix crosslinking agent comprises a 2,5-mercapto-1,3,4-thiadiazole-sulfur dichloride polymer and a propylene bisdithiocarbamate zinc polymer in a mass ratio of 6:

1.

4. The self-tightening anchor material according to claim 1, characterized in that: The anchor matrix cross-linking promoter includes 5-[(3-methylthiazolidine-2-ylidene)ethylidene]-4-oxo-2-thioketothiazolidine-3-acetic acid and 5-[1-methyl-2-(3-methylthiazolidine-2-ylidene)ethylidene]-4-oxo-2-thioketothiazolidine-3-acetic acid in a mass ratio of 5:

1.

5. The self-tightening anchor material according to claim 1, characterized in that: The reinforcing agent comprises 1,3,5,7,9,11,14-heptacyclohexyltricyclo[7.3.3.15,11]heptasiloxane-3,7,14-triol and N-phenylamino-cage polysilsesquioxane in a mass ratio of 1:

1.

6. The self-tightening anchor material according to any one of claims 1 to 5, characterized in that: The interface modifier comprises octylphenoxy polyethoxy ethyl phosphate and perfluorooctane sulfonic acid amine in a mass ratio of 3:

1.

7. A method for preparing a magneto-expansion self-tightening anchor material, characterized in that: The following steps are involved: Mixing the anchor matrix monomer material, the reinforcing agent, the magnetic molecules, and the interface modifier according to stoichiometric ratio to obtain a mixed matrix material; Adding an initiator, an anchor matrix crosslinking agent, and an anchor matrix crosslinking accelerator to the mixed matrix material according to stoichiometric amounts and mixing them uniformly to obtain a mixture A; The mixed material A is heated and melted to carry out a polymerization reaction; the melted slurry is injected into a mold and heated to 150-180° C. to carry out a cross-linking reaction, thereby preparing the self-tightening anchor material according to any one of claims 1-6.

8. The preparation method according to claim 7, characterized in that The mixed material A is heated to 100-120°C to undergo polymerization reaction; the melted slurry is heated to 25-30W / cm 2 Ultrasonic heating.

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