Single-component acrylic acid type microcapsule pre-coating thread locking agent and preparation method thereof

Abstract

The invention relates to the technical field of thread locking agents, in particular to a single-component acrylic acid type microcapsule pre-coating thread locking agent and a preparation method thereof. The invention relates to a single-component acrylic acid type microcapsule precoating thread locking agent which is characterized by being prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules, 10-50 parts of curing agent microgel, 0-15 parts of a thickening agent, 0-15 parts of a plasticizer, 0-10 parts of a light absorbent, 80-200 parts of a solvent, 5-30 parts of an adhesive, 0-20 parts of a lubricant, 0-10 parts of a curing agent, 0-20 parts of inorganic filler and 0-8 parts of color paste. The low-toxicity solvent is adopted, and the problem that the curing performance is affected by moisture regain is solved. The friction coefficient can be controlled to be 0.10-0.16, the application range of the product is greatly widened, lubricating wax and a sealing agent do not need to be additionally sprayed or dip-coated in the using process, the process is simplified, the cost is reduced, and using is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of thread locking agents, and particularly relates to a one-component acrylic microcapsule pre-coated thread locking agent and a preparation method thereof. Background Art

[0002] Thread locking agents are adhesives composed of (meth)acrylate, initiator, co-promoter, stabilizer (polymerization inhibitor), dye, filler, etc. in a certain proportion. At present, the common thread locking agents on the market are mainly two-component water-based acrylate pre-coating agents. The component A is mainly composed of a dispersion of acrylic monomers, and the component B is a microencapsulated initiator. Before use, the two components are mixed in advance, coated on the thread, and dried to form a reactive adhesive film. When the thread is assembled, the microcapsules in the already formed reactive adhesive film are broken, releasing the initiator, which initiates the polymerization and curing of the acrylate monomers, forming a thermosetting resin in the thread gap, thereby playing a role in preventing loosening.

[0003] Since it is a water-based resin material, during the actual process of applying glue to screws, it is difficult to dry the moisture, resulting in low production efficiency; and there are many hydrophilic materials in the water-based pre-coated thread locking agent. After drying to form an adhesive film on the bolt, it is very easy to absorb moisture in the air and cause moisture return. When the moisture content is relatively high, the curing strength of the assembled thread locking agent will be greatly reduced, and even cannot be cured.

[0004] In order to solve the problem of moisture resistance and water resistance, the invention patent CN104893635A discloses a one-component thread locking epoxy pre-coating adhesive and a preparation method thereof. This one-component thread locking epoxy pre-coating adhesive is made of coated epoxy capsules, epoxy curing agent, filler, toluene and film-forming agent. Although this one-component thread locking epoxy pre-coating adhesive can solve the problem of moisture return of water-based pre-coating adhesives, using toluene with relatively high toxicity as a solvent will cause great harm to the human body during production and use. Therefore, it is necessary to explore a more low-toxic solution. In addition, the measured friction coefficient of the fastener thread of this one-component thread locking epoxy pre-coating adhesive exceeds 0.25, and the friction coefficient is very large. However, industries including automobiles, wind power, bridges, construction machinery, etc. recommend that the friction coefficient should be controlled within 0.08 - 0.18, and some more strict requirements are even within 0.1 - 0.16. This has a certain impact on the scope of application of the product.

[0005] Therefore, it is necessary to develop a one-component acrylic microcapsule pre-coated thread locking agent with low toxicity, moisture return avoidance and low friction coefficient. Summary of the Invention

[0006] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a one-component acrylic microcapsule pre-coated thread locking agent, which can not only reduce the toxicity of the thread locking agent, but also avoid the influence of moisture absorption on the curing performance, while accelerating the volatilization rate to improve the drying efficiency, and solve the requirement of low friction coefficient.

[0007] In order to achieve the above objective, a one-component acrylic microcapsule pre-coated thread locking agent provided by the present application adopts the following technical solution:

[0008] A one-component acrylic microcapsule pre-coated thread locking agent is prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules, 10 - 50 parts of curing agent microgels, 0 - 15 parts of thickeners, 0 - 15 parts of plasticizers, 0 - 10 parts of light absorbers, 80 - 200 parts of solvents, 5 - 30 parts of adhesives, 0 - 20 parts of lubricants, 0 - 10 parts of curing agents, 0 - 20 parts of inorganic fillers, and 0 - 8 parts of color pastes. Among them, the light absorber can inhibit heat accumulation.

[0009] Preferably, the acrylic resin microcapsules are selected from acrylic resin microcapsules with amino organosilicon acrylic resin (Preparation and drag reduction performance of internal coating for crude oil pipeline based on amino organosilicon acrylic resin [J]. Chemistry and Adhesion, 2025, 47(02): 167 - 171 + 176), polyacrylate-double bond dopamine resin (Preparation and properties of polyacrylate-double bond dopamine film-forming agent containing catechol structure [J / OL]. Fine Chemicals, 1 - 10 [2025 - 04 - 01]), polymethyl methacrylate (PMMA), acrylic resin-n-dodecanol, propionaldehyde resin, styrene-acrylic resin, silicone-acrylic resin, and tertiary acrylic resin as the core material.

[0010] Preferably, the curing agent microgels are selected from microcapsules with poly(N-isopropylacrylamide), poly(N,N-dimethylacrylamide), poly(ethylene oxide)-polyacrylamide block copolymer, poly(tert-butyl methacrylate), poly(tributyl acrylate), or poly(neopentyl methacrylate) as the core material.

[0011] Preferably, the thickener is poly(sulfobetaine) or poly(carboxybetaine).

[0012] Preferably, the light absorber includes an infrared absorber and a UV absorber. The infrared absorber is polypolyaniline, carbon nanotubes, titanium dioxide, or cesium-doped tungsten oxide (Cs 0.33 WO3); the UV absorber is 2-(2'-hydroxy-5'-methylphenyl)benzotriazole.

[0013] Preferably, the volatile solvent is selected from one or more of acetone, methylcyclohexane, dimethyl carbonate, isopropanol, heptane, and propyl acetate.

[0014] Preferably, the adhesive is selected from one or more of epoxy resin, acrylate, starch, casein, polyvinyl alcohol, fish glue, rosin, hot melt adhesive, and shellac.

[0015] Preferably, the lubricant is selected from one or more of glass microspheres, graphite, boron nitride, paraffin wax, and polyethylene powder.

[0016] Preferably, the curing agent is selected from one or more of vinyltriamine, aminoethylpiperazine, and diaminodiphenylmethane.

[0017] The second object of the present invention is to provide a preparation method of a one-component acrylic microcapsule pre-coated thread locking agent.

[0018] In order to achieve the above object, a preparation method of a one-component acrylic microcapsule pre-coated thread locking agent provided by the present application adopts the following technical solutions:

[0019] A preparation method of a one-component acrylic microcapsule pre-coated thread locking agent includes the following steps:

[0020] A preparation method of a one-component acrylic microcapsule pre-coated thread locking agent includes the following steps:

[0021] (1) Mix the acrylic resin microcapsules, thickener, and light absorber evenly to form component A;

[0022] (2) Mix the curing agent microgel, solvent, inorganic filler, and color paste evenly, add component A, plasticizer, adhesive, lubricant, and curing agent, and stir evenly at 30 - 50 °C to obtain the product.

[0023] Beneficial effects:

[0024] (1) The one-component acrylic microcapsule pre-coated thread locking agent of the present invention uses acrylic resin microcapsules, curing agent microgel, thickener, infrared absorber, solvent, adhesive, lubricant, curing agent, inorganic filler, and color paste as raw materials, which can effectively solve the problem of the influence of moisture on the curing performance, and at the same time, reduce the toxicity of the solvent. In addition, the one-component acrylic microcapsule pre-coated thread locking agent of the present invention can be made into a white lubricant or a colorless lubricant according to needs, which is convenient for solving the problem of post-coloring.

[0025] (2) The thread locking agent of the present invention does not contain S and P, and is an anaerobic thread locking agent suitable for thread locking and sealing. It is filled into the grooves of thread fasteners. When the thread fastener is tightened, the glued surface is isolated from the air, and it can polymerize and cure quickly at room temperature under the catalysis of the surface metal. After curing, it has good sealing and lubricating properties, and can be widely used in industries such as automobiles, machinery, electronics, and electrical appliances.

[0026] (3) The one-component acrylic microcapsule pre-coated thread locking agent of the present invention can control the friction coefficient between 0.10 and 0.16, greatly expanding the scope of application of the product. Moreover, during use, there is no need to spray or dip lubricating wax and sealant separately, which simplifies the process, reduces costs, and makes it more convenient to use. Detailed implementation manners

[0027] The following will describe the present application in detail with reference to embodiments. Each example is provided by way of explanation of the present application rather than limitation thereof. In fact, those skilled in the art will clearly understand that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, features shown or described as part of one embodiment can be used in another embodiment to yield yet another embodiment. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the embodiments of the present invention shall fall within the scope protected by the embodiments of the present invention.

[0028] Example 1

[0029] A one-component acrylic microcapsule pre-coated thread locking agent is prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules with amino organosilicon acrylic resin as the core material, 20 parts of microcapsules with poly(N-isopropylacrylamide) as the core material, 5 parts of poly(sulfobetaine), 5 parts of dioctyl phthalate, 3 parts of polyphenylamine, 2 parts of 2-(2'-hydroxy-5'-methylphenyl) benzotriazole, 140 parts of acetone, 5 parts of starch, 5 parts of hollow glass microspheres, 3 parts of vinyltriamine, and 5 parts of fumed silica.

[0030] Among them, the amino organosilicon acrylic resin is prepared with reference to the research on the preparation and drag reduction performance of the inner coating of crude oil pipelines based on amino organosilicon acrylic resin [J]. Chemistry and Adhesion, 2025, 47(02): 167-171+176.

[0031] A preparation method of a one-component acrylic microcapsule pre-coated thread locking agent includes the following steps:

[0032] (1) Mix the acrylic resin microcapsules, thickener, and light absorber evenly to prepare Component A;

[0033] (2) Mix the curing agent microgel, solvent, inorganic filler, and color paste evenly, add Component A, plasticizer, binder, lubricant, and curing agent, and stir evenly at 30°C to obtain the product.

[0034] Example 2

[0035] A one-component acrylic microcapsule pre-coated thread locking agent is prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules with polyacrylate-double-bonded dopamine resin as the core material, 30 parts of microcapsules with poly(N,N-dimethylacrylamide) as the core material, 10 parts of poly(sulfobetaine), 10 parts of dioctyl phthalate, 5 parts of carbon nanotubes, 3 parts of 2-(2'-hydroxy-5'-methylphenyl) benzotriazole, 150 parts of methylcyclohexane, 10 parts of polyvinyl alcohol, 10 parts of graphite, 5 parts of aminoethyl piperazine, and 10 parts of nano calcium carbonate.

[0036] Among them, the amino organosilicon acrylic resin is prepared with reference to the research on the preparation and drag reduction performance of the crude oil pipeline inner coating based on amino organosilicon acrylic resin [J]. Chemistry and Adhesion, 2025, 47(02): 167-171+176.

[0037] A preparation method of a one-component acrylic microcapsule pre-coated thread locking agent includes the following steps:

[0038] (1) Mix the acrylic resin microcapsules, thickener, and light absorber evenly to make component A;

[0039] (2) Mix the curing agent microgel, solvent, inorganic filler, and color paste evenly, add component A, plasticizer, binder, lubricant, and curing agent, and stir evenly at 30°C to obtain the product.

[0040] Example 3

[0041] A one-component acrylic microcapsule pre-coated thread locking agent is prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules with polymethyl methacrylate as the core material, 50 parts of microcapsules with polyethylene oxide-polyacrylamide block copolymer as the core material, 15 parts of poly(sulfobetaine), 15 parts of dioctyl phthalate, 3 parts of titanium dioxide, 5 parts of 2-(2'-hydroxy-5'-methylphenyl) benzotriazole, 170 parts of dimethyl carbonate, 15 parts of fish glue, 10 parts of graphite, 8 parts of diaminodiphenylmethane, 20 parts of talc powder, and 8 parts of iron oxide pigment.

[0042] A preparation method of a one-component acrylic microcapsule pre-coated thread locking agent includes the following steps:

[0043] (1) Mix the acrylic resin microcapsules, thickener, and light absorber evenly to make component A;

[0044] (2) Mix the curing agent microgel, solvent, inorganic filler, and color paste evenly, add component A, plasticizer, binder, lubricant, and curing agent, and stir evenly at 40°C to obtain the product.

[0045] Example 4

[0046] A one-component acrylic microcapsule pre-applied thread locking agent is prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules with acrylic resin - dodecanol as the core material, 40 parts of microcapsules with poly(tert-butyl methacrylate) as the core material, 5 parts of poly(carboxybetaine), 10 parts of dioctyl adipate, 5 parts of cesium-doped tungsten oxide (Cs 0.33 WO3), 5 parts of 2-(2'-hydroxy-5'-methylphenyl) benzotriazole, 200 parts of isopropanol, 20 parts of rosin, 15 parts of polyethylene powder, 10 parts of aminoethylpiperazine, 15 parts of talcum powder, 5 parts of phthalocyanine blue BGS.

[0047] A preparation method of a one-component acrylic microcapsule pre-applied thread locking agent comprises the following steps:

[0048] (1) Mix the acrylic resin microcapsules, thickener and light absorber evenly to prepare component A;

[0049] (2) Mix the curing agent microgel, solvent, inorganic filler and color paste evenly, add component A, plasticizer, binder, lubricant and curing agent, and stir evenly at 50 °C to obtain the product.

[0050] Example 5

[0051] A one-component acrylic microcapsule pre-applied thread locking agent is prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules with styrene-acrylic resin as the core material, 25 parts of microcapsules with tributyl acrylate as the core material, 10 parts of poly(carboxybetaine), 15 parts of dioctyl adipate, 7 parts of polyphenyleneamine, 5 parts of 2-(2'-hydroxy-5'-methylphenyl) benzotriazole, 150 parts of heptane, 15 parts of acrylate, 15 parts of paraffin wax, 8 parts of aminoethylpiperazine, 10 parts of kaolin, 3 parts of phthalocyanine green G.

[0052] A preparation method of a one-component acrylic microcapsule pre-applied thread locking agent comprises the following steps:

[0053] (1) Mix the acrylic resin microcapsules, thickener and light absorber evenly to prepare component A;

[0054] (2) Mix the curing agent microgel, solvent, inorganic filler and color paste evenly, add component A, plasticizer, binder, lubricant and curing agent, and stir evenly at 50 °C to obtain the product.

[0055] Example 6

[0056] A one-component acrylic microcapsule pre-applied thread locking agent is prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules with silicon acrylic resin as the core material, 10 parts of microcapsules with polyneopentyl methacrylate as the core material, 15 parts of poly(carboxybetaine), 10 parts of dibutyl phthalate, 8 parts of polyphenyleneamine, 7 parts of 2-(2'-hydroxy-5'-methylphenyl) benzotriazole, 140 parts of ethyl acetate, 10 parts of polyvinyl alcohol, 10 parts of hollow glass microspheres, 5 parts of aminoethyl piperazine, 5 parts of fumed silica, and 2 parts of pigment red 122 (Lithol Rubine).

[0057] A preparation method of a one-component acrylic microcapsule pre-applied thread locking agent comprises the following steps:

[0058] (1) Mix the acrylic resin microcapsules, thickener, and light absorber evenly to prepare Component A;

[0059] (2) Mix the curing agent microgel, solvent, inorganic filler, and color paste evenly, add Component A, plasticizer, binder, lubricant, and curing agent, and stir evenly at 50°C to obtain the product.

[0060] Comparative Example 1

[0061] A one-component acrylic microcapsule pre-applied thread locking agent is prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules with styrene acrylic resin as the core material, 10 parts of microcapsules with tributyl acrylate as the core material, 5 parts of dioctyl phthalate, 3 parts of polyphenyleneamine, 140 parts of acetone, 5 parts of starch, 5 parts of hollow glass microspheres, 3 parts of vinyltriamine, and 5 parts of fumed silica.

[0062] Its preparation method refers to Example 1.

[0063] Comparative Example 2

[0064] A one-component acrylic microcapsule pre-applied thread locking agent is prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules with styrene acrylic resin as the core material, 10 parts of microcapsules with tributyl acrylate as the core material, 5 parts of dioctyl phthalate, 2 parts of 2-(2'-hydroxy-5'-methylphenyl) benzotriazole, 140 parts of acetone, 5 parts of starch, 5 parts of hollow glass microspheres, 3 parts of vinyltriamine, and 5 parts of fumed silica.

[0065] Its preparation method refers to Example 1.

[0066] Comparative Example 3

[0067] A one-component acrylic microcapsule pre-coated thread locking agent is prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules with styrene-acrylic resin as the core material, 10 parts of microcapsules with tributyl acrylate as the core material, 5 parts of dioctyl phthalate, 140 parts of acetone, 5 parts of starch, 5 parts of hollow glass microspheres, 3 parts of vinyltriamine, and 5 parts of fumed silica.

[0068] Its preparation method refers to Example 1.

[0069] Performance test:

[0070] 1. Viscosity of the adhesive solution: The thread locking agent is respectively tested according to the rotational viscometer method of GB / T 2794 at a rotational speed of 20 rpm.

[0071] 2. Adhesion of the adhesive film: The thread locking agent is evenly coated on 5 M10×50 color zinc-plated bolts, placed in a constant temperature drying oven at 70°C for 15 min, taken out and cooled to room temperature, then screwed into an M10 standard nut, and observe whether there is still an adhesive film remaining in the bolt thread groove exposed after screwing in the nut. If there is a continuous adhesive film, it indicates good adhesion; if there is an adhesive film but it is intermittent, it indicates general adhesion; if there is no adhesive film, it indicates poor adhesion.

[0072] 3. Screw-in torque: The thread locking agent is evenly coated on 5 M10×50 color zinc-plated bolts, placed in a constant temperature drying oven at 70°C for 15 min, taken out and cooled to room temperature, and then screwed into an M10 standard nut using a digital torque wrench with automatic counting to make the bolt expose 2 - 3 threads, and test the maximum torque during this process, which is the screw-in torque, and check whether the data meets the requirements of standard GB / T35480.

[0073] 4. Thread friction coefficient: The thread locking agent is evenly coated on 10 10.9-grade M10×50 color zinc-plated bolts, placed in a constant temperature drying oven at 70°C for 15 min, taken out and cooled to room temperature. Then, the thread friction coefficient is tested according to GB / T16823.3, and check whether the data meets the requirements of standard GB / T35480.

[0074] 5. Breaking torque and pull-out torque: The thread locking agent is evenly coated on 5 10.9-grade M10×50 galvanized bolts, placed in a constant temperature drying oven at 70°C for 15 min, taken out and cooled to room temperature. Screw in an M10 standard nut to make the bolt expose 2 - 3 threads, and then cure for 72 h, and test and compare whether the data meets the standard requirements according to GB / T35480.

[0075] The above bolts use 10.9-grade M10 color zinc-plated bolts specified in GB / T 5782, and the nuts use 10-grade M10 color zinc-plated nuts specified in GB / T 6170. The fit precision of the bolt and nut: bolt 6g, nut 6H.

[0076] Summarize the above performance test results as shown in Table 1:

[0077] Table 1 Summary of performance test results for Examples 1-6 and Comparative Examples 1-3.

[0078]

[0079]

[0080] As can be seen from Table 1, compared with Comparative Examples 1-3, the thread locking agents of Examples 1-6 all adopt a formulation system of solvent and water-insoluble curing agent. The toxicity of the product can be further reduced, the cured film is insensitive to moisture after drying and is not prone to moisture return. The screwing torque of the thread locking agents of Examples 1-6 is less than 3 N·m, the viscosity is relatively low, the matching with spraying equipment is good, and the adhesion of the cured film is good. The thread locking agent of the present invention can achieve that while reducing the toxicity of the product, the cured film is insensitive to moisture after drying and is not prone to moisture return. The thread locking agent of the present invention can control the friction coefficient between 0.10 and 0.16, expand the application range of the product, and there is no need to spray or dip lubricating wax and sealant additionally during use, which simplifies the process, reduces costs and is more convenient to use. The thread locking agent of the present invention does not contain S and P, and is an anaerobic thread locking agent suitable for thread locking and sealing. It is filled into the grooves of threaded fasteners. When the threaded fasteners are tightened, the coated surface is isolated from the air and can polymerize and cure quickly at room temperature under the catalysis of the surface metal. After curing, it has good sealing and lubricity and can be widely used in industries such as automobiles, machinery, electronics, and electrical appliances.

[0081] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. 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.

[0082] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A one-component acrylic microcapsule pre-applied thread locking agent, characterized in that It is prepared from the following raw materials in parts by mass: 100 parts of acrylic resin microcapsules, 10 - 50 parts of curing agent microgels, 0 - 15 parts of thickeners, 0 - 15 parts of plasticizers, 0 - 10 parts of light absorbers, 80 - 200 parts of solvents, 5 - 30 parts of adhesives, 0 - 20 parts of lubricants, 0 - 10 parts of curing agents, 0 - 20 parts of inorganic fillers, and 0 - 8 parts of color pastes.

2. The one-component acrylic microcapsule pre-coated thread locking agent according to claim 1, characterized in that, The acrylic resin microcapsules are selected from acrylic resin microcapsules with amino organosilicon acrylic resin, polyacrylate - double - bonded dopamine resin, polymethyl methacrylate, acrylic resin - n - dodecanol, propionaldehyde resin, styrene - acrylic resin, silicone - acrylic resin, and tertiary acrylic resin as the core materials.

3. The one-component acrylic microcapsule pre-coated thread locking agent according to claim 1, characterized in that, The curing agent microgels are selected from microcapsules with poly(N - isopropylacrylamide), poly(N,N - dimethylacrylamide), poly(ethylene oxide - polyacrylamide) block copolymer, poly(tert - butyl methacrylate), poly(tributyl acrylate), or poly(neopentyl methacrylate) as the core materials.

4. The one-component acrylic microcapsule pre-applied thread locking agent according to claim 1, characterized in that, The thickener is poly(sulfobetaine) or poly(carboxybetaine).

5. The one-component acrylic microcapsule pre-applied thread locking agent according to claim 1, characterized in that, The light absorber includes an infrared absorber and a UV absorber. The infrared absorber is polypolyaniline, carbon nanotubes, titanium dioxide, or cesium - doped tungsten oxide; the UV absorber is 2 - (2'-hydroxy - 5'-methylphenyl)benzotriazole.

6. The one-component acrylic microcapsule pre-coated thread locking agent according to claim 1, characterized in that, The volatile solvent is selected from one or more of acetone, methylcyclohexane, dimethyl carbonate, isopropanol, heptane, and propyl acetate.

7. The one-component acrylic microcapsule pre-coated thread locking agent according to claim 1, characterized in that, The adhesive is selected from one or more of epoxy resin, acrylate, starch, casein, polyvinyl alcohol, fish glue, rosin, hot melt adhesive, and shellac.

8. The one-component acrylic microcapsule pre-coated thread locking agent according to claim 1, wherein, The lubricant is selected from one or more of glass microspheres, graphite, boron nitride, paraffin wax, and polyethylene powder.

9. The one-component acrylic microcapsule pre-coated thread locking agent according to claim 1, wherein The curing agent is selected from one or more of vinyltriamine, aminoethylpiperazine, and diaminodiphenylmethane.

10. A preparation method of a one-component acrylic microcapsule pre-coated thread locking agent as described in any one of claims 1 to 9, characterized in that, It includes the following steps: (1) Mix the acrylic resin microcapsules, thickener, and light absorber evenly to form Component A; (2) Mix the curing agent microgels, solvent, inorganic filler, and color paste evenly, add Component A, plasticizer, adhesive, lubricant, and curing agent, and stir evenly at 30 - 50 °C to obtain the product.

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