A water-based acrylic emulsion for mesh cloth and a preparation method thereof

Abstract

This invention discloses an aqueous acrylic emulsion for use in mesh fabric production. The raw materials, by weight, include: 10-20 parts acrylic acid and its ester monomers, 15-20 parts styrene monomers, 1-2 parts emulsifier, 0.1-0.3 parts initiator, 0.02-0.12 parts organosilicon monomer, 0.5-1 part crosslinking monomer, and 66-69 parts water. The organosilicon monomer is a vinyl silane monomer, and the crosslinking monomer is a hydroxyl-containing propylene monomer. When used in mesh fabric production, the aqueous mesh fabric emulsion prepared by this invention enhances the shaping strength of the emulsion and improves the tensile breaking strength of the mesh fabric.

Description

Technical Field

[0001] This invention belongs to the field of architectural coatings, specifically relating to an aqueous acrylic emulsion for mesh fabric and its preparation method. Background Technology

[0002] Fiberglass mesh is a new type of alkali-resistant product made from medium-alkali or alkali-free fiberglass yarn woven into a fiberglass mesh substrate, then coated with acrylic copolymer solution and dried. This product features stable structure, high strength, good alkali resistance, corrosion resistance, and crack resistance, providing optimal reinforcement. It is also simple and easy to install, primarily suitable for reinforcing and crack-preventing the interior and exterior surfaces of cement, gypsum, and wall structures. It is a new type of building material for external wall insulation projects.

[0003] Currently, problems such as poor shaping effect, low strength, and easy detachment of glass fibers occur during the preparation of mesh fabric. This is due to the low degree of cross-linking in the synthesis of water-based mesh fabric emulsion, resulting in the generation of low molecular weight oligomers. The main reasons for the emulsion formulation are the ratio of main monomers in the synthesized emulsion and the lack of grafting of effective functional monomers, which leads to low strength of the coating film after drying. Once subjected to mechanical external force, the shaping effect of the coating film will be destroyed. As a result, not only will the coating film lose its adhesive properties, but the glass fiber raw material will also lose its usability, greatly affecting the performance of the mesh fabric. Summary of the Invention

[0004] This invention provides an aqueous acrylic emulsion for mesh fabric and its preparation method, in order to solve the problems of looseness, breakage, and poor shaping effect that exist in existing mesh fabrics coated with acrylic copolymer liquid after drying.

[0005] The present invention solves the above-mentioned technical problems by adopting the following technical solutions:

[0006] An aqueous acrylic emulsion for use in mesh fabrics comprises, by weight, 10-20 parts acrylic acid and its ester monomers, 15-20 parts styrene monomers, 1-2 parts emulsifier, 0.1-0.3 parts initiator, 0.02-0.12 parts organosilicon monomer, 0.5-1 part crosslinking monomer, and 66-69 parts water, wherein the organosilicon monomer is a vinyl silane monomer, and the crosslinking monomer is a hydroxyl-containing propylene monomer.

[0007] Preferably, the acrylic acid and its ester monomers are composed of hard monomers and soft monomers, wherein the hard monomers include acrylic acid, acrylamide, methacrylic acid, and methyl methacrylate; more preferably, the hard monomers include methyl methacrylate, acrylic acid, and acrylamide;

[0008] The soft monomer includes at least one of isooctyl acrylate, n-butyl acrylate, isobutyl acrylate, and ethyl acrylate; more preferably, the soft monomer includes n-butyl acrylate.

[0009] In a preferred embodiment, the acrylic acid and its ester monomers are composed of the following components in parts by weight: 9-12:2:1:1 n-butyl acrylate, methyl methacrylate, acrylic acid, and acrylamide.

[0010] Preferably, the styrene monomer includes at least one of styrene, 3-chlorostyrene, 4-chlorostyrene, and p-chlorostyrene; more preferably, the styrene monomer includes styrene.

[0011] Preferably, the organosilicon monomer includes one of vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriacetoxysilane, vinyltrichlorosilane, and vinyltributylone oxime silane; more preferably, the organosilicon monomer is vinyltrimethoxysilane.

[0012] Preferably, the crosslinking monomer includes one of hydroxymethylacrylamide, hydroxyethyl acrylate, and hydroxyethyl methacrylate; more preferably, the crosslinking monomer includes hydroxymethylacrylamide.

[0013] Preferably, the emulsifier comprises at least one of sodium alkyl sulfosuccinate monoester, disodium lauryl polyoxyethylene ether sulfosuccinate, and disodium ethoxylated fatty alcohol xanthyl succinate half-ester; more preferably, the emulsifier is sodium alkyl sulfosuccinate monoester.

[0014] As a preferred embodiment, an aqueous acrylic emulsion for mesh fabric comprises, by weight, the following raw materials: 9-12 parts n-butyl acrylate, 2 parts methyl methacrylate, 1 part acrylic acid, 1 part acrylamide, 15-18 parts styrene, 1.1-1.6 parts sodium sulfosuccinate monoester emulsifier, 0.1-0.3 parts initiator, 0.1 parts vinyltrimethoxysilane, 0.7-1 part hydroxymethylacrylamide, and 66-67 parts water.

[0015] A method for preparing an aqueous acrylic emulsion for mesh fabric includes the following steps:

[0016] Step (1) The acrylic acid and its ester monomers, the styrene monomers, the organosilicon monomers, water, and part of the emulsifier are mixed and pre-emulsified to obtain a pre-emulsified monomer;

[0017] Step (2) Water and the initiator are mixed to obtain initiator addition liquid A; the remaining emulsifier and water are mixed to obtain bottom liquid B;

[0018] Step (3) Take 4-6 wt% of pre-emulsified monomer and mix it with the bottom liquid B. Then add the initiator addition liquid A mentioned in Part 1 to carry out the initial reaction. After the initial reaction is completed, add the remaining pre-emulsified monomer and the initiator addition liquid A mentioned in Part 2 at the same time. After reacting for a period of time, start adding crosslinking monomer to continue the reaction. Finally, after heat preservation reaction, material C is obtained.

[0019] In step (4), the initiator added to the third part A is added dropwise to the material C. After the reaction is kept at a constant temperature, the pH value of the system is adjusted to 7-9 to obtain the final product.

[0020] In some embodiments, the initiator includes at least one of ammonium persulfate, potassium persulfate, and sodium persulfate.

[0021] In some embodiments, the weight ratio of the initiator in the first part, the initiator in the second part, and the initiator in the third part is (1.2-1.5):1:(0.1-0.4).

[0022] In some embodiments, the mass ratio of a portion of the emulsifier to the remaining portion of the emulsifier is 1.25-1.35:1, for example, in a particular embodiment, it is preferably 1.3:1.

[0023] In step (1), the pre-emulsification conditions and methods are conventional in the art and can generally be carried out under stirring conditions.

[0024] In step (2), when preparing material A, the temperature of the mixing reaction is the temperature conventional for this type of operation in the art, preferably 18-25℃.

[0025] In step (2), when preparing material B, the mixing temperature is 85-87℃.

[0026] In step (3), the initial reaction time is 5-10 min, preferably 6-8 min.

[0027] In step (3), the portion of seed pre-emulsified monomer taken is preferably 4-6 wt%.

[0028] In step (3), after the remaining pre-emulsified monomer and the initiator added to the second part A are added dropwise for 1.5 to 2.5 hours, the crosslinking monomer is added dropwise for 3 to 4 hours.

[0029] In step (3), the reaction temperature is 82-87℃, more preferably 84-87℃.

[0030] In step (3), the temperature of the heat preservation reaction is the conventional temperature for this type of operation in the art, preferably 84-87°C, and the time of the heat preservation reaction is the conventional time for this type of operation in the art, preferably 1-2.5h, preferably 1.5-2h.

[0031] In step (4), the second heat preservation reaction may be followed by a cooling operation, which can generally be reduced to below 40°C, preferably to 15-40°C.

[0032] The reagents and raw materials used in this invention are all commercially available.

[0033] Compared with the prior art, the positive and progressive effects of the present invention are as follows:

[0034] In addition to soft and hard monomers, the waterborne acrylic emulsion of this invention contains styrene monomers and vinyl-containing silanes and hydroxyl-containing functional crosslinking monomers. The addition of styrene monomers helps to improve the hardness and strength of the emulsion, while vinyl-containing silanes and hydroxyl-containing functional crosslinking monomers can undergo coupling reactions with polar groups such as hydroxyl and carboxyl groups in acrylic molecules to form strong covalent bonds, which helps to improve the strength and molecular weight of the paint film. The prepared acrylic emulsion, after being wrapped in a mesh cloth, can still maintain a certain paint film state even when subjected to mechanical external forces and is not easily dispersed and deactivated.

[0035] Furthermore, the timing of the addition of organosilicon monomers and crosslinking monomers during emulsion preparation significantly impacts the emulsion's strength properties. In this invention, the organosilicon monomers are added during the initial reaction, while the crosslinking monomers are added later in the dropwise reaction. Initially, the pre-emulsified monomers containing organosilicon monomers undergo polymerization. A small portion of the pre-emulsified monomers, acting as an initiator, first undergoes preliminary polymerization in the emulsifier (i.e., seed emulsion polymerization), forming a sufficient number of sufficiently small latex particles in the micelles. These particles then continue polymerization with a large quantity of other monomer raw materials. Subsequent reactions, with the addition of crosslinking monomers, cause the polymer particles to gradually grow, forming a uniform network of polymer dispersions. This process facilitates the coupling reaction between the organosilicon monomers, crosslinking monomers, and polar groups such as hydroxyl and carboxyl groups in the acrylic acid molecules. Vinyl functional groups are effectively grafted onto the long polymer chains, resulting in a stable reaction, moderate particle size, increased molecular weight and post-crosslinking strength, and ultimately improved product strength properties.

[0036] The preparation process of the water-based mesh fabric emulsion obtained by this invention is easy to control, the synthesis reaction is stable, the apparent particle size is moderate, and the amount of slag is low. Through this process, the coating film strength of the water-based mesh fabric emulsion in the later stage is enhanced. Attached Figure Description

[0037] Figure 1 This is a photograph of the finished mesh fabric after it has been coated with emulsion and dried, and then shaped. Detailed Implementation

[0038] The present invention is further illustrated below by way of embodiments, but the invention is not limited to the scope of the embodiments described herein. Experimental methods in the following embodiments that do not specify specific conditions were performed according to conventional methods and conditions, or as selected according to the product instructions.

[0039] Example 1

[0040] This embodiment yields an aqueous acrylic emulsion for mesh fabric, the raw materials of which include the following components in parts by weight, as detailed in Table 1.

[0041] Table 1. Weight proportions of each component in the raw materials

[0042]

[0043]

[0044] The preparation method of aqueous mesh fabric emulsion includes the following steps:

[0045] (1) 56.5 wt% sodium sulfosuccinate alkyl alcohol monoester, 58 wt% water, styrene, methyl methacrylate, acrylic acid, acrylamide, and vinyltrimethoxysilane were stirred and emulsified to obtain a pre-emulsified monomer.

[0046] (2) 33wt% water and the remaining sodium sulfosuccinate alkyl alcohol monoester were loaded into the reaction vessel, stirred, and then heated to 86℃.

[0047] (3) Mix the remaining water with ammonium persulfate to obtain the initiator addition solution; add 5 wt% of the pre-emulsified monomer into the reactor, and immediately add 52 wt% of ammonium persulfate. The initial reaction takes 7 minutes. After the initial reaction is completed, the remaining pre-emulsified monomer and 47.7 wt% of ammonium persulfate are added dropwise at the same time. After 2 hours of dropwise addition, the crosslinking monomer is added. During the dropwise addition, the temperature of the system is controlled at 86-87℃ and the dropwise addition time is 3.5 hours. After the dropwise addition is completed, the remaining initiator is added and the reaction is kept warm for 2 hours.

[0048] (4) After the reaction is complete, the system temperature is lowered to below 40°C and neutralized with ammonia to a pH of 7-9 to obtain an aqueous mesh fabric emulsion.

[0049] Example 2

[0050] The raw materials in this embodiment include the following components in parts by weight, as detailed in Table 2.

[0051] Table 2. Weight proportions of each component in the raw materials

[0052]

[0053]

[0054] The preparation method of aqueous mesh fabric emulsion includes the following steps:

[0055] (1) 56.5 wt% sodium sulfosuccinate alkyl alcohol monoester, 58 wt% water, styrene, methyl methacrylate, acrylic acid, acrylamide, and vinyltrimethoxysilane were stirred and emulsified to obtain a pre-emulsified monomer.

[0056] (2) 33wt% water and the remaining sodium sulfosuccinate alkyl alcohol monoester were loaded into the reaction vessel, stirred, and then heated to 86℃.

[0057] (3) Mix the remaining water with ammonium persulfate to obtain the initiator addition solution; add 5 wt% of the pre-emulsified monomer into the reactor, and immediately add 52 wt% of ammonium persulfate. The initial reaction takes 7 minutes. After the initial reaction is completed, the remaining pre-emulsified monomer and 47.7 wt% of ammonium persulfate are added dropwise at the same time. After 2 hours of dropwise addition, the crosslinking monomer is added. During the dropwise addition, the temperature of the system is controlled at 86-87℃ and the dropwise addition time is 3.5 hours. After the dropwise addition is completed, the remaining initiator is added and the reaction is kept warm for 2 hours.

[0058] (4) After the reaction is complete, the system temperature is lowered to below 40°C and neutralized with ammonia to a pH of 7-9 to obtain an aqueous mesh fabric emulsion.

[0059] Example 3

[0060] The raw materials in this embodiment include the following components in parts by weight, as detailed in Table 3.

[0061] Table 3. Weight proportions of each component in the raw materials

[0062]

[0063]

[0064] The preparation method of aqueous mesh fabric emulsion includes the following steps:

[0065] (1) 56.5 wt% sodium sulfosuccinate alkyl alcohol monoester, 58 wt% water, styrene, methyl methacrylate, acrylic acid, acrylamide, and vinyltrimethoxysilane were stirred and emulsified to obtain a pre-emulsified monomer.

[0066] (2) 33wt% water and the remaining sodium sulfosuccinate alkyl alcohol monoester were loaded into the reaction vessel, stirred, and then heated to 86℃.

[0067] (3) Mix the remaining water with ammonium persulfate to obtain the initiator addition solution; add 5 wt% of the pre-emulsified monomer into the reactor, and immediately add 52 wt% of ammonium persulfate. The initial reaction takes 7 minutes. After the initial reaction is completed, the remaining pre-emulsified monomer and 47.7 wt% of ammonium persulfate are added dropwise at the same time. After 1.5 h of dropwise addition, the crosslinking monomer is added. During the dropwise addition, the temperature of the system is controlled at 86-87℃. The dropwise addition time is 3.5 h. After the dropwise addition is completed, the remaining initiator is added, and the reaction is kept warm for 2 h.

[0068] (4) After the reaction is complete, the system temperature is lowered to below 40℃ and neutralized with ammonia to a pH of 7-9 to obtain an aqueous mesh fabric emulsion.

[0069] Example 4

[0070] The raw materials in this embodiment include the following components in parts by weight, as detailed in Table 4.

[0071] Table 4. Weight proportions of each component in the raw materials

[0072] n-Butyl acrylate 11 copies Methyl methacrylate 2 copies styrene 16 copies acrylic acid 1 copy Acrylamide 1 copy Sodium salt of alkyl sulfosuccinate monoester 1.6 copies ammonium persulfate 0.2 copies Vinyltrimethoxysilane 0.1 copies Hydroxymethylacrylamide 1 copy water 66.1 copies

[0073] The preparation method of aqueous mesh fabric emulsion includes the following steps:

[0074] (1) 56.5 wt% sodium sulfosuccinate alkyl alcohol monoester, 58 wt% water, styrene, methyl methacrylate, acrylic acid, acrylamide, and vinyltrimethoxysilane were stirred and emulsified to obtain a pre-emulsified monomer.

[0075] (2) 33wt% water and the remaining sodium sulfosuccinate alkyl alcohol monoester were loaded into the reaction vessel, stirred, and then heated to 86℃.

[0076] (3) Mix the remaining water with ammonium persulfate to obtain the initiator addition solution; add 5 wt% of the pre-emulsified monomer into the reactor, and immediately add 52 wt% of ammonium persulfate. The initial reaction takes 7 minutes. After the initial reaction is completed, the remaining pre-emulsified monomer and 47.7 wt% of ammonium persulfate are added dropwise at the same time. After 2 hours of dropwise addition, the crosslinking monomer is added. During the dropwise addition, the temperature of the system is controlled at 86-87℃ and the dropwise addition time is 3.5 hours. After the dropwise addition is completed, the remaining initiator is added and the reaction is kept warm for 2 hours.

[0077] (4) After the reaction is complete, the system temperature is lowered to below 40°C and neutralized with ammonia to a pH of 7-9 to obtain an aqueous mesh fabric emulsion.

[0078] Referring to Example 1, the present invention also provides the following comparative examples.

[0079] Comparative Example 1

[0080] The specific raw material composition is the same as in Example 1, but the preparation method is different. The difference lies in the timing of the addition of the crosslinking monomer, which is different from that in Example 1.

[0081] The preparation method of aqueous mesh fabric emulsion includes the following steps:

[0082] (1) 56.5wt% sodium sulfosuccinate alkyl alcohol monoester, 58wt% water, styrene, methyl methacrylate, acrylic acid, acrylamide, vinyltrimethoxysilane, and crosslinking monomer were stirred and emulsified to obtain a pre-emulsified monomer.

[0083] (2) 33wt% water and the remaining sodium sulfosuccinate alkyl alcohol monoester were loaded into the reaction vessel, stirred, and then heated to 86℃.

[0084] (3) Mix the remaining water with ammonium persulfate to obtain the initiator addition solution; add 5 wt% of the pre-emulsified monomer into the reactor, and immediately add 52 wt% of ammonium persulfate. The initial reaction takes 7 minutes. After the initial reaction is completed, the remaining pre-emulsified monomer and 47.7 wt% of ammonium persulfate are added dropwise until the end. During the dropwise addition, the temperature of the system is controlled at 86-87℃ and the dropwise addition time is 3.5h. After the dropwise addition is completed, add the remaining initiator and keep the reaction at the temperature for 2h.

[0085] (4) After the reaction is complete, the system temperature is lowered to below 40°C and neutralized with ammonia to a pH of 7-9 to obtain an aqueous mesh fabric emulsion.

[0086] Comparative Example 2

[0087] The specific raw material composition is the same as in Example 1, except that the timing of adding silicon monomers is different from that in Example 1.

[0088] The preparation method of aqueous mesh fabric emulsion includes the following steps:

[0089] (1) 56.5 wt% sodium sulfosuccinate alkyl alcohol monoester, 58 wt% water, styrene, methyl methacrylate, acrylic acid, and acrylamide were stirred and emulsified to obtain a pre-emulsified monomer.

[0090] (2) 33wt% water and the remaining sodium sulfosuccinate alkyl alcohol monoester were loaded into the reaction vessel, stirred, and then heated to 86℃.

[0091] (3) Mix the remaining water with ammonium persulfate to obtain the initiator addition solution; add 5 wt% of the pre-emulsified monomer into the reactor, and immediately add 52 wt% of ammonium persulfate. The initial reaction takes 7 minutes. After the initial reaction is completed, the remaining pre-emulsified monomer and 47.7 wt% of ammonium persulfate are added dropwise at the same time. When the dropwise addition is 2 hours, the silicon monomer and crosslinking monomer are added. During the dropwise addition, the temperature of the system is controlled at 86-87℃ and the dropwise addition time is 3.5 hours. After the dropwise addition is completed, the remaining initiator is added and the reaction is kept at the temperature for 2 hours.

[0092] (4) After the reaction is complete, the system temperature is lowered to below 40°C and neutralized with ammonia to a pH of 7-9 to obtain an aqueous mesh fabric emulsion.

[0093] Comparative Example 3

[0094] The specific raw material composition is the same as in Example 1, except that the timing of the addition of the crosslinking monomer is different from that in Example 1, and no initial reaction is carried out.

[0095] The preparation method of aqueous mesh fabric emulsion includes the following steps:

[0096] (1) 56.5wt% sodium sulfosuccinate alkyl alcohol monoester, 58wt% water, styrene, methyl methacrylate, acrylic acid, acrylamide, vinyltrimethoxysilane, and crosslinking monomer were stirred and emulsified to obtain a pre-emulsified monomer.

[0097] (2) 33wt% water and the remaining sodium sulfosuccinate alkyl alcohol monoester were loaded into the reaction vessel, stirred, and then heated to 86℃.

[0098] (3) Mix the remaining water with ammonium persulfate to obtain the initiator addition solution; add 52wt% ammonium persulfate, react for 3 minutes initially, then simultaneously add the pre-emulsified monomer and 47.7wt% ammonium persulfate until the end. During the addition, the temperature of the system is controlled at 86-87℃, and the addition time is 3.5h. After the addition is completed, add the remaining initiator and keep the reaction at the temperature for 2h.

[0099] (4) After the reaction is complete, the system temperature is lowered to below 40°C and neutralized with ammonia to a pH of 7-9 to obtain an aqueous mesh fabric emulsion.

[0100] Comparative Example 4

[0101] The difference from Example 1 is that the organosilicon monomer vinyltrimethoxysilane is not added; otherwise, they are the same as in Example 1.

[0102] Comparative Example 5

[0103] The difference from Example 1 is that the crosslinking monomer hydroxymethylacrylamide is not added; otherwise, they are the same as in Example 1.

[0104] Comparative Example 6

[0105] Compared with Example 1, the difference is that styrene is replaced with the hard monomer methyl methacrylate, otherwise it is the same as Example 1.

[0106] Effect test

[0107] Using the water-based mesh fabric emulsions prepared in Examples 1-4 and Comparative Examples 1-6 as raw materials, finished mesh fabrics were prepared, and the tensile breaking strength of the mesh fabrics was tested according to industry standard JG149-2003.

[0108] The specific method is as follows: After coating the spliced ​​and twisted fiberglass mesh with a water-based mesh emulsion, it is placed in a 280℃ drying tunnel and left to stand for 2-3 hours under environmental conditions of (23±1℃, humidity 50±2%) to obtain the final product. Figure 1 This is a photograph of the finished mesh fabric after emulsion coating and drying according to the present invention. The maximum tensile strength, or tensile breaking strength, was measured using a tensile testing machine along the perpendicular direction of the specimen surface at a tensile rate of 5 mm / min. The experimental results are detailed in Table 5.

[0109] Table 5 Tensile breaking strength data

[0110]

[0111]

[0112] As can be seen from the test results in Table 5, the tensile breaking strength of the water-based mesh fabric emulsions prepared in Examples 1-4 of this invention is significantly better than that of commercially available emulsions and also significantly better than that of the water-based mesh fabric emulsions prepared in Comparative Examples 1-6, demonstrating significant progress.

[0113] Finally, it should be noted that in this invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0114] Although this disclosure has been described above through specific embodiments, it should be understood that those skilled in the art can devise various modifications, improvements, or equivalents to this disclosure within the spirit and scope of the appended solutions. Such modifications, improvements, or equivalents should also be considered to be included within the scope of protection claimed in this disclosure.

Claims

1. An aqueous acrylic emulsion for use in mesh fabrics, characterized in that, The raw materials, by weight, include: 10-20 parts acrylic acid and its ester monomers, 15-20 parts styrene monomers, 1-2 parts emulsifier, 0.1-0.3 parts initiator, 0.02-0.12 parts organosilicon monomer, 0.5-1 part crosslinking monomer, and 66-69 parts water, wherein the organosilicon monomer is a vinyl silane monomer, and the crosslinking monomer is a hydroxyl-containing propylene monomer; the acrylic acid and its ester monomers are composed of hard monomers and soft monomers; The method for preparing an aqueous acrylic emulsion for mesh fabric includes the following steps: Step (1) The acrylic acid and its ester monomers, the styrene monomers, the organosilicon monomers, water, and part of the emulsifier are mixed and pre-emulsified to obtain a pre-emulsified monomer; Step (2) Water and the initiator are mixed to obtain initiator addition liquid A; the remaining emulsifier and water are mixed to obtain bottom liquid B; Step (3) Take 4-6 wt% of pre-emulsified monomer and mix it with the bottom liquid B. Then add the initiator addition liquid A mentioned in Part 1 to carry out the initial reaction. After the initial reaction is completed, add the remaining pre-emulsified monomer and the initiator addition liquid A mentioned in Part 2 at the same time. After reacting for a period of time, start adding crosslinking monomer to continue the reaction. Finally, after heat preservation reaction, material C is obtained. In step (4), the initiator added to the third part A is added dropwise to the material C. After the reaction is kept at a constant temperature, the pH value of the system is adjusted to 7-9 to obtain the final product.

2. The aqueous acrylic emulsion for mesh fabric according to claim 1, characterized in that, The hard monomers include acrylic acid, methacrylic acid, and methyl methacrylate; the soft monomers include at least one of isooctyl acrylate, n-butyl acrylate, isobutyl acrylate, and ethyl acrylate.

3. The aqueous acrylic emulsion for mesh fabric according to claim 1, characterized in that, The styrene monomers include at least one of styrene, 3-chlorostyrene, and 4-chlorostyrene.

4. The aqueous acrylic emulsion for mesh fabric according to claim 1, characterized in that, The silicon monomers mentioned include one of vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriacetoxysilane, vinyltrichlorosilane, and vinyltributylone oxime silane; The crosslinking monomers include one of hydroxymethylacrylamide, hydroxyethyl acrylate, and hydroxyethyl methacrylate.

5. The aqueous acrylic emulsion for mesh fabric according to claim 1, characterized in that, The emulsifier includes at least one of sodium alkyl sulfosuccinate monoester, disodium lauryl ether sulfosuccinate, and disodium ethoxylated fatty alcohol sulfosuccinate half-ester.

6. The aqueous acrylic emulsion for mesh fabric according to claim 1, characterized in that, The mass ratio of the emulsifier described in step (1) to the remaining emulsifier in step (2) is 1.25-1.35:

1.

7. The aqueous acrylic emulsion for mesh fabric according to claim 1, characterized in that, In step (3), after the remaining pre-emulsified monomer and the initiator added to the second part of the solution A are added dropwise for 1.5 to 2.5 hours, the crosslinking monomer is added dropwise. The crosslinking monomer is added dropwise for 3 to 4 hours, and the reaction temperature is 82-87℃.

8. The aqueous acrylic emulsion for mesh fabric according to claim 1, characterized in that, In step (3), the initial reaction time is 5-10 min.

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