Quick-drying leveling mortar for sticking rock plates and preparation method and application thereof

Abstract

The application belongs to the technical field of leveling mortar, and discloses quick-drying leveling mortar for sticking rock plates and a preparation method and application thereof. The quick-drying leveling mortar for sticking rock plates comprises 100 parts by weight of quartz sand, 30-55 parts by weight of cement, 2-4 parts by weight of a diluent, 20-36 parts by weight of an acid anhydride curing agent, 0.6-1.4 parts by weight of a curing accelerator, and 0.3-2 parts by weight of mercaptomethyl polystyrene grafted polyacrylonitrile fiber. The mercaptomethyl polystyrene grafted polyacrylonitrile fiber contains a large number of mercapto groups on the surface, can undergo a curing cross-linking reaction with epoxy resin, accelerates the curing reaction of the epoxy resin, and significantly reduces the curing time of the epoxy mortar. The polyacrylonitrile fiber is grafted into the molecular chain of the epoxy resin through chemical bonding, enhances the compatibility and bonding strength of the polyacrylonitrile fiber and the epoxy resin, and significantly improves the compressive strength and the bending strength of the leveling mortar.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of leveling mortar, in particular to a fast-drying leveling mortar for sticking rock plates and a preparation method and application thereof. BACKGROUND

[0002] Wall leveling is an important prerequisite and condition for wall finishing, and it is inconvenient to do decoration when the wall is uneven. Especially before laying ceramic tiles or floor panels, the wall needs to be leveled. The leveling mortar used in the existing wall leveling needs 7-15 days to level the base surface and curing and solidification, and can only be laid after curing and solidification.

[0003] Epoxy resin mortar is mainly composed of epoxy resin, curing agent, and quartz sand, cement and other hardening agents, and has good bonding strength, water resistance and corrosion resistance, and is widely used in rock plate bonding, concrete repair, track bolt hole hole fixing and other aspects. However, the traditional epoxy resin mortar has the problems of slow curing speed and low strength after curing.

[0004] Adding polymer fibers, glass fibers, inorganic nanomaterials and other reinforcing agents to epoxy resin mortar is an effective method to improve the comprehensive performance of epoxy mortar. Among them, the mechanical strength of polyacrylonitrile fiber is large, the tensile modulus is high, and the anti-fracture performance is good, and it is widely used in epoxy resin, cement mortar, concrete and other building materials. The invention patent with publication number CN106517959B discloses a surface modified fiber toughened epoxy mortar, which uses polyacrylonitrile fiber or polyvinyl alcohol fiber coated with polydopamine to modify the epoxy mortar, and the obtained mortar has better toughness, bending strength and compressive strength. However, the patent does not improve the curing speed of the epoxy mortar and reduce the curing time. SUMMARY

[0005] The technical problem solved by the present application is to solve the problem of low construction efficiency of rock plate paving leveling that requires at least one week of curing time before paving rock plates in the prior art, and to solve the problem of low strength of the mortar.

[0006] The technical solution of the present application is: a fast-drying leveling mortar for sticking rock plates, comprising 100 parts by weight of quartz sand, 25-40 parts by weight of epoxy resin, 30-55 parts by weight of cement, 2-4 parts by weight of diluent, 20-36 parts by weight of acid anhydride curing agent, 0.6-1.4 parts by weight of curing accelerator, and 0.3-2 parts by weight of mercaptomethyl polystyrene grafted polyacrylonitrile fiber.

[0007] The preparation method of mercaptomethyl polystyrene grafted polyacrylonitrile fiber is as follows:

[0008] Step (1), polyacrylonitrile fiber is washed with acetone, then added into chlorobenzene for swelling for 12-18 hours, the swollen polyacrylonitrile fiber is added into an acetone solution containing 4-thioacetyl styrene and dibenzoyl peroxide, under the irradiation of ultraviolet light source in a nitrogen atmosphere for grafting reaction for 6-12 hours, filtered, washed with xylene, and dried to obtain thioacetyl styrene grafted polyacrylonitrile fiber.

[0009] Step (2), the thioacetyl styrene grafted polyacrylonitrile fiber is added into a sodium hydroxide solution, stirred for reaction, then diluted hydrochloric acid is added, filtered, washed with water, and dried to obtain mercaptomethyl polystyrene grafted polyacrylonitrile fiber.

[0010] Preferably, in step (1), the molar concentration of 4-thioacetyl styrene in the acetone solution is 0.5-2 mol / L, and the molar concentration of dibenzoyl peroxide is 0.008-0.035 mol / L.

[0011] Preferably, in step (2), the mass concentration of the sodium hydroxide solution is 80-120 g / L.

[0012] Preferably, in step (2), the reaction temperature is 40-50℃, and the reaction time is 3-6 hours.

[0013] Preferably, in step (2), diluted hydrochloric acid is added to adjust the pH of the solution to 5-6.

[0014] Preferably, the preparation method of 4-thioacetyl styrene is as follows: 4-chloromethyl styrene and potassium thioacetate are added into N,N-dimethylformamide in a molar ratio of 1:(1.6-2.4), heated to 50-65℃ under a nitrogen atmosphere, reacted for 4-8 hours, water is added, then extracted with dichloromethane, the organic phase is dried with anhydrous sodium sulfate, filtered, the filtrate is rotary evaporated, and the product is recrystallized in dichloromethane to obtain 4-thioacetyl styrene. The reaction formula is as follows:

[0015]

[0016] Preferably, the quartz sand is composed of quartz sand fine material and quartz sand coarse material in a mass ratio of (25-33):(67-75); the average particle size of the quartz sand fine material is 100-200 mesh; and the average particle size of the quartz sand coarse material is 20-50 mesh. The cement is high-aluminum cement or sulfur-aluminum cement.

[0017] Preferably, the diluent is AGE alkyl glycidyl ether; and the curing accelerator is 2,4,6-tris(dimethylaminomethyl) phenol DMP-30.

[0018] Preferably, the anhydride curing agent is methylhexahydrophthalic anhydride or methyltetrahydrophthalic anhydride.

[0019] Preferably, the preparation method of the fast-drying leveling mortar for sticking rock plates is as follows: adding epoxy resin, mercaptomethyl polystyrene grafted polyacrylonitrile fiber into a diluent, stirring, then adding quartz sand, cement, water, stirring, then vibrating and defoaming, finally adding anhydride curing agent and curing accelerator, and uniformly mixing to obtain the fast-drying leveling mortar for sticking rock plates.

[0020] The technical effect of the present application is that the polyacrylonitrile fiber is subjected to ultraviolet light irradiation grafting reaction with 4-thioacetyl styrene, and then the thioacetyl group is hydrolyzed by sodium hydroxide to generate a mercapto group, thereby obtaining mercaptomethyl polystyrene grafted polyacrylonitrile fiber, so that a polystyrene molecular chain containing a mercapto group is introduced on the surface of the polyacrylonitrile fiber.

[0021] The present application uses quartz sand and epoxy resin as the main materials of the epoxy mortar, uses anhydride curing agent and DMP-30 accelerator as the curing system, and uses mercaptomethyl polystyrene grafted polyacrylonitrile fiber as the filling and reinforcing agent to obtain the fast-drying leveling epoxy mortar. The surface of the mercaptomethyl polystyrene grafted polyacrylonitrile fiber contains a large number of mercapto groups, and the added DMP-30 can not only act as a curing accelerator for the anhydride curing agent, but also act as a catalytic accelerator. The DMP-30 contains multiple tertiary amine groups, which can remove the proton hydrogen from the mercapto group to generate active mercapto negative ions, which can rapidly undergo ring-opening reaction with the epoxy resin, so that the polyacrylonitrile fiber and the epoxy resin can undergo curing and cross-linking reaction, the curing reaction of the epoxy resin is accelerated, and the curing time of the epoxy mortar is significantly reduced.

[0022] The mercaptomethyl polystyrene grafted polyacrylonitrile fiber of the present application can undergo curing and cross-linking reaction with the epoxy resin, and the polyacrylonitrile fiber can be grafted into the molecular chain of the epoxy resin through chemical bonding, which can enhance the compatibility and bonding strength of the polyacrylonitrile fiber and the epoxy resin, improve the dispersibility of the polyacrylonitrile fiber in the epoxy mortar, and the polystyrene molecular chain grafted with polyacrylonitrile has the advantages of high strength and high structural stability, thereby significantly improving the compressive strength and flexural strength of the epoxy mortar. The obtained epoxy mortar has good practical application in wall leveling materials, rock plate sticking materials, road repair materials, and floor materials. In practical application, the product can be initially cured within 1 hour, finally cured within 3 hours, reach a strength of >= 30 MPa, and the base surface can be leveled within 3 hours, and the rock plate can be directly stuck after leveling, achieving fast leveling, no maintenance, short curing time, and direct sticking of the brick. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Example 1

[0025] (1) 50 mmol of 4-chloromethylstyrene, 120 mmol of potassium thioacetate were added into 1000 mL of N,N-dimethylformamide, heated to 55°C under nitrogen atmosphere, reacted for 8 h, added water, then extracted with dichloromethane, the organic phase was dried with anhydrous sodium sulfate, filtered, the filtrate was rotary evaporated, the product was recrystallized in dichloromethane to obtain 4-thioacetylstyrene.

[0026] (2) The polyacrylonitrile fiber was washed with acetone, then added into chlorobenzene for swelling for 18 h, 10 g of the swollen polyacrylonitrile fiber was added into 400 mL of acetone solution containing 4-thioacetylstyrene, dibenzoyl peroxide, the molar concentration of 4-thioacetylstyrene in the acetone solution was controlled to be 1.2 mol / L, and the molar concentration of dibenzoyl peroxide was controlled to be 0.023 mol / L; under nitrogen atmosphere, a high-pressure mercury lamp was used as the ultraviolet light source for irradiation for grafting reaction for 8 h, filtered, washed with xylene, and dried to obtain the 4-thioacetylstyrene grafted polyacrylonitrile fiber.

[0027] (3) The 4-thioacetylstyrene grafted polyacrylonitrile fiber was added into a sodium hydroxide solution with a mass concentration of 120 g / L, heated to 40°C, stirred for reaction for 4 h, then added with dilute hydrochloric acid to pH 6, filtered, washed with water, and dried to obtain the mercaptomethyl polystyrene grafted polyacrylonitrile fiber.

[0028] (4) 340 g of epoxy resin 51, 3 g of the mercaptomethyl polystyrene grafted polyacrylonitrile fiber, 280 g of fine quartz sand with a particle size of 200 mesh, 720 g of coarse quartz sand with a particle size of 20 mesh, 420 g of high-alumina cement, and 220 mL of water were added into 32 g of the diluent AGE alkyl glycidyl ether, stirred, defoamed by vibration, finally 300 g of anhydride curing agent methyl hexahydrophthalic anhydride and 11 g of curing accelerator 2,4,6-tris(dimethylaminomethyl)phenol DMP-30 were added, mixed uniformly to obtain the fast-drying leveling mortar for sticking rock plates.

[0029] Example 2

[0030] (1) 50 mmol of 4-chloromethylstyrene, 120 mmol of potassium thioacetate were added into 1000 mL of N,N-dimethylformamide, heated to 55°C under nitrogen atmosphere, reacted for 8 h, added water, then extracted with dichloromethane, the organic phase was dried with anhydrous sodium sulfate, filtered, the filtrate was rotary evaporated, the product was recrystallized in dichloromethane to obtain 4-thioacetylstyrene.

[0031] (2), polyacrylonitrile fiber is washed with acetone, then added to chlorobenzene for swelling 18h, 10g of the swollen polyacrylonitrile fiber is added to 400mL of acetone solution containing 4-thioacetyl styrene, dibenzoyl peroxide, the molar concentration of 4-thioacetyl styrene in the acetone solution is controlled to be 2mol / L, the molar concentration of dibenzoyl peroxide is 0.035mol / L; under the atmosphere of nitrogen, a high-pressure mercury lamp is used as a UV light source for irradiation to carry out grafting reaction for 12h, filtered, washed with xylene, and dried to obtain thioacetyl styrene grafted polyacrylonitrile fiber.

[0032] (3), the thioacetyl styrene grafted polyacrylonitrile fiber is added to a sodium hydroxide solution with a mass concentration of 120g / L, heated to 40℃, stirred for 6h, then diluted hydrochloric acid is added to pH 6, filtered, washed with water, and dried to obtain mercaptomethyl polystyrene grafted polyacrylonitrile fiber.

[0033] (4), 250g of epoxy resin 51, 3g of mercaptomethyl polystyrene grafted polyacrylonitrile fiber, 330g of fine quartz sand with a particle size of 100 mesh, 670g of coarse quartz sand with a particle size of 20 mesh, 550g of high-alumina cement, and 300mL of water are added to 20g of diluent AGE alkyl glycidyl ether, stirred, and then vibrated to remove bubbles, finally 200g of anhydride curing agent methyl tetrahydrophthalic anhydride and 6g of curing accelerator 2,4,6-tris(dimethylaminomethyl) phenol DMP-30 are added, mixed uniformly, to obtain fast-drying leveling mortar for sticking rock plates.

[0034] Example 3

[0035] (1), 50mmol of 4-chloromethylstyrene and 80mmol of potassium thioacetate are added to 800mL of N,N-dimethylformamide, heated to 65℃ under the atmosphere of nitrogen, and reacted for 4h, then water is added, followed by extraction with dichloromethane, the organic phase is dried with anhydrous sodium sulfate, filtered, the filtrate is rotary evaporated, and the product is recrystallized in dichloromethane to obtain 4-thioacetyl styrene.

[0036] (2), polyacrylonitrile fiber is washed with acetone, then added to chlorobenzene for swelling 12h, 10g of the swollen polyacrylonitrile fiber is added to 400mL of acetone solution containing 4-thioacetyl styrene, dibenzoyl peroxide, the molar concentration of 4-thioacetyl styrene in the acetone solution is controlled to be 0.5mol / L, the molar concentration of dibenzoyl peroxide is 0.008mol / L; under the atmosphere of nitrogen, a high-pressure mercury lamp is used as a UV light source for irradiation to carry out grafting reaction for 6h, filtered, washed with xylene, and dried to obtain thioacetyl styrene grafted polyacrylonitrile fiber.

[0037] (3) The thioacetyl styrene grafted polyacrylonitrile fiber is added into a sodium hydroxide solution with a mass concentration of 80 g / L, heated to 50°C, stirred for 3 h, then dilute hydrochloric acid is added to pH 5, filtered, washed with water, and dried to obtain a mercaptomethyl polystyrene grafted polyacrylonitrile fiber.

[0038] (4) 400 g of epoxy resin 51, 3 g of mercaptomethyl polystyrene grafted polyacrylonitrile fiber, 250 g of fine quartz sand with a particle size of 100 mesh, 750 g of coarse quartz sand with a particle size of 50 mesh, 300 g of sulphoaluminate cement, and 130 mL of water are added to 40 g of diluent AGE alkyl glycidyl ether, stirred, and then deaerated by vibration. Finally, 360 g of anhydride curing agent methyl hexahydrophthalic anhydride and 14 g of curing accelerator 2,4,6-tris(dimethylaminomethyl) phenol DMP-30 are added and mixed to obtain a fast-drying leveling mortar for sticking rock plates.

[0039] Example 4

[0040] (1) The mercaptomethyl polystyrene grafted polyacrylonitrile fiber is prepared according to the method of Example 1.

[0041] (2) 340 g of epoxy resin 51, 12 g of mercaptomethyl polystyrene grafted polyacrylonitrile fiber, 280 g of fine quartz sand with a particle size of 200 mesh, 720 g of coarse quartz sand with a particle size of 20 mesh, 420 g of high-alumina cement, and 220 mL of water are added to 32 g of diluent AGE alkyl glycidyl ether, stirred, and then deaerated by vibration. Finally, 300 g of anhydride curing agent methyl hexahydrophthalic anhydride and 11 g of curing accelerator 2,4,6-tris(dimethylaminomethyl) phenol DMP-30 are added to obtain a fast-drying leveling mortar for sticking rock plates.

[0042] Example 5

[0043] (1) The mercaptomethyl polystyrene grafted polyacrylonitrile fiber is prepared according to the method of Example 1.

[0044] (2) 340 g of epoxy resin 51, 12 g of mercaptomethyl polystyrene grafted polyacrylonitrile fiber, 280 g of fine quartz sand with a particle size of 200 mesh, 720 g of coarse quartz sand with a particle size of 20 mesh, 420 g of high-alumina cement, and 220 mL of water are added to 32 g of diluent AGE alkyl glycidyl ether, stirred, and then deaerated by vibration. Finally, 300 g of anhydride curing agent methyl hexahydrophthalic anhydride and 11 g of curing accelerator 2,4,6-tris(dimethylaminomethyl) phenol DMP-30 are added to obtain a fast-drying leveling mortar for sticking rock plates.

[0045] Comparative Example 1

[0046] (1), to 32 g diluent AGE alkyl glycidyl ether, add 340 g epoxy resin 51, after stirring, add 280 g fine quartz sand with average particle size of 200 mesh, 720 g coarse quartz sand with average particle size of 20 mesh, 420 g high alumina cement, 220 mL water, stir and then vibration defoaming, finally add 300 g anhydride curing agent methyl hexahydrophthalic anhydride, 11 g curing accelerator 2,4,6-tris(dimethylaminomethyl) phenol DMP-30, mix well, get fast-drying leveling mortar for sticking rock plate.

[0047] Comparative example 2

[0048] (1), to 32 g diluent AGE alkyl glycidyl ether, add 340 g epoxy resin 51, 3 g polyacrylonitrile fiber, after stirring, add 280 g fine quartz sand with average particle size of 200 mesh, 720 g coarse quartz sand with average particle size of 20 mesh, 420 g high alumina cement, 220 mL water, stir and then vibration defoaming, finally add 300 g anhydride curing agent methyl hexahydrophthalic anhydride, 11 g curing accelerator 2,4,6-tris(dimethylaminomethyl) phenol DMP-30, mix well, get fast-drying leveling mortar for sticking rock plate.

[0049] Comparative example 3

[0050] (1) Prepare the thioacetyl styrene grafted polyacrylonitrile fiber according to the method of example 1.

[0051] (2), to 32 g diluent AGE alkyl glycidyl ether, add 340 g epoxy resin 51, 3 g thioacetyl styrene grafted polyacrylonitrile fiber, after stirring, add 280 g fine quartz sand with average particle size of 200 mesh, 720 g coarse quartz sand with average particle size of 20 mesh, 420 g high alumina cement, 220 mL water, stir and then vibration defoaming, finally add 300 g anhydride curing agent methyl hexahydrophthalic anhydride, 11 g curing accelerator 2,4,6-tris(dimethylaminomethyl) phenol DMP-30, mix well, get fast-drying leveling mortar for sticking rock plate.

[0052] The high alumina cement used in the above examples and comparative examples: CA-50 high alumina cement, Zhengzhou Zhongtai Cement Co., Ltd.

[0053] Pour the fast-drying leveling mortar for sticking rock plate into the mold, and cure at 90℃; measure the curing time of the epoxy mortar according to GB / T1346-2011 method.

[0054] After curing, the epoxy mortar test piece is placed at room temperature for 7-28 days with humidity of 80% RH; measure the compressive strength and flexural strength of the test piece according to GBT17671-2021 method. The test results are shown in the contents of tables 1-3.

[0055] Table 1 epoxy mortar curing performance test

[0056]

[0057]

[0058] From the above table, the curing time of the epoxy mortar in examples 1-5 is only 25-55 min, the curing speed is fast, mainly because the surface of the mercaptomethyl polystyrene grafted polyacrylonitrile fiber contains a large number of mercapto groups, and the added DMP-30 can be used as a catalytic promoter, which contains multiple tertiary amine groups, which can remove the proton hydrogen of mercapto group to generate active mercapto negative ions, which can react with epoxy resin to generate rapid ring-opening reaction, so that the mercaptomethyl polystyrene grafted polyacrylonitrile fiber and the epoxy resin can occur curing crosslinking reaction, which can accelerate the curing reaction of the epoxy resin and significantly reduce the curing time of the epoxy mortar.

[0059] Comparative example 1 does not add mercaptomethyl polystyrene grafted polyacrylonitrile fiber, and comparative examples 2 and 3 add polyacrylonitrile fiber which does not contain mercapto group, which cannot react with epoxy resin to generate rapid curing reaction, and cannot reduce the curing time of the epoxy mortar.

[0060] Table 2 compressive strength test of epoxy mortar

[0061]

[0062] Table 3 flexural strength test of epoxy mortar

[0063]

[0064]

[0065] From table 1 and table 2, compared with example 1, the epoxy mortar in examples 1-5 adds mercaptomethyl polystyrene grafted polyacrylonitrile fiber, which can react with epoxy resin under the catalytic promotion of DMP-30, so that the mercaptomethyl polystyrene grafted polyacrylonitrile fiber and the epoxy resin can occur curing crosslinking reaction, which can graft the polyacrylonitrile fiber into the molecular chain of the epoxy resin through chemical bonding, enhance the compatibility and bonding strength of the polyacrylonitrile fiber and the epoxy resin, improve the dispersibility of the polyacrylonitrile fiber in the epoxy mortar, and the polystyrene molecular chain grafted with polyacrylonitrile has the advantages of high strength and high structural stability, thereby significantly improving the compressive strength and flexural strength of the epoxy mortar.

[0066] Compared with example 1, the polyacrylonitrile fiber added in comparative examples 2 and 3 does not contain mercapto group, which cannot react with epoxy resin to generate rapid curing reaction, resulting in low compatibility and bonding strength of the polyacrylonitrile fiber and the epoxy resin, poor reinforcing effect on the epoxy mortar, and significantly lower compressive strength and flexural strength than example 1.

[0067] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes, modifications, substitutions and variations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A fast-drying self-leveling mortar for sticking rock plates, characterized by, The quick-drying leveling mortar for sticking rock plates comprises 100 parts by weight of quartz sand, 25-40 parts by weight of epoxy resin, 30-55 parts by weight of cement, 2-4 parts by weight of diluent, 20-36 parts by weight of acid anhydride curing agent, 0.6-1.4 parts by weight of curing accelerator, and 0.3-2 parts by weight of mercaptomethyl polystyrene grafted polyacrylonitrile fiber. The preparation method of the mercaptomethyl polystyrene grafted polyacrylonitrile fiber comprises the following steps: Step (1), the polyacrylonitrile fiber is washed with acetone and then added into chlorobenzene for swelling for 12-18 hours, the swollen polyacrylonitrile fiber is added into an acetone solution containing 4-thioacetyl styrene and dibenzoyl peroxide, and a grafting reaction is carried out under the irradiation of an ultraviolet lamp source for 6-12 hours in a nitrogen atmosphere, followed by filtration, washing, and drying to obtain thioacetyl styrene grafted polyacrylonitrile fiber; Step (2), the thioacetyl styrene grafted polyacrylonitrile fiber is added into a sodium hydroxide solution, stirred and reacted, then diluted hydrochloric acid is added, followed by filtration, washing, and drying to obtain mercaptomethyl polystyrene grafted polyacrylonitrile fiber. 2.The quick-drying self-leveling mortar for sticking rock plates according to claim 1, characterized in that, In step (1), the molar concentration of 4-thioacetyl styrene in the acetone solution is 0.5-2 mol / L, and the molar concentration of dibenzoyl peroxide is 0.008-0.035 mol / L. 3.The quick-drying self-leveling mortar for sticking rock plates according to claim 1, characterized in that, In step (2), the mass concentration of the sodium hydroxide solution is 80-120 g / L. 4.The quick-drying self-leveling mortar for sticking rock plates according to claim 1, characterized in that, In step (2), the reaction temperature is 40-50 ℃, and the reaction time is 3-6 hours. 5.The quick-drying self-leveling mortar for sticking rock plates according to claim 1, characterized in that, In step (2), diluted hydrochloric acid is added to adjust the pH of the solution to 5-6. 6.The quick-drying self-leveling mortar for sticking rock plates according to claim 2, characterized in that, The preparation method of the 4-thioacetyl styrene comprises the following steps: 4-chloromethyl styrene and potassium thioacetate are added into N,N-dimethylformamide in a molar ratio of 1:(1.6-2.4), heated to 50-65 ℃ under a nitrogen atmosphere, and reacted for 4-8 hours, then water is added, followed by extraction with dichloromethane and recrystallization to obtain 4-thioacetyl styrene. 7.The quick-drying self-leveling mortar for sticking rock plates according to claim 1, characterized in that, The quartz sand is composed of quartz sand fine material and quartz sand coarse material in a mass ratio of (25-33):(67-75); the average particle size of the quartz sand fine material is 100-200 mesh; the average particle size of the quartz sand coarse material is 20-50 mesh; and the cement is high-aluminum cement or sulfur-aluminum cement. 8.The quick-drying self-leveling mortar for sticking rock plates according to claim 1, characterized in that, The diluent is AGE alkyl glycidyl ether; and the curing accelerator is 2,4,6-tris(dimethylaminomethyl) phenol. 9.The quick-drying self-leveling mortar for sticking rock plates according to claim 1, characterized in that, The acid anhydride curing agent is methylhexahydrophthalic anhydride or methyltetrahydrophthalic anhydride.

10. A method of preparing the fast-drying self-leveling mortar for tiling according to any one of claims 1-9, characterized in that, The preparation method comprises the following steps: the diluent, the epoxy resin, and the mercaptomethyl polystyrene grafted polyacrylonitrile fiber are added into the quartz sand, the cement, and water, stirred, and then vibrated to remove bubbles, finally the acid anhydride curing agent and the curing accelerator are added, and mixed to obtain the quick-drying leveling mortar for sticking rock plates.

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