Coating material for PVC mesh cloth and preparation method thereof

Abstract

The present application relates to the field of coating materials, and specifically discloses a coating material and preparation method for PVC mesh cloth, including the following raw materials in parts by weight: 90-110 parts of PVC resin powder, 25-50 parts of viscosity adjuster, 0.5-1.5 parts of dispersant, 6.5-8 parts of plasticizer, 6-12 parts of processing aid, the viscosity adjuster includes 2-4 parts of base oil, 1-3 parts of petroleum sulfonate, 1-2 parts of amino acid and 15-25 parts of filler. Its preparation method includes the following steps: dissolving PVC resin powder in a solvent to form a paste to obtain PVC paste; mechanically stirring the filler and base oil using ultrasonic coupling, adding sodium petroleum sulfonate and amino acid to mix evenly to obtain viscosity adjuster; stirring and mixing the PVC paste with viscosity adjuster, dispersant, plasticizer and processing aid. The obtained coating material has excellent fluidity, can be evenly coated on the surface of the mesh cloth, and has good adhesion to the mesh cloth.

Description

Technical Field

[0001] The present application relates to the field of coating materials, and more specifically, to a coating material for PVC mesh cloth and a preparation method thereof. Background Art

[0002] PVC mesh cloth is a mesh material made of polyvinyl chloride (PVC). It has a relatively sparse tissue density and holes and gaps between the yarns. It is light, soft, durable, waterproof and corrosion-resistant. It is widely used in sunshade materials, decorative materials and guardrail materials.

[0003] In order to enhance the overall strength of the mesh cloth, a layer of coating material is usually applied on its surface. However, the coating materials on the market are not easy to evenly cover the mesh cloth during application, and after the coating material is formed, it usually blocks the holes of the mesh cloth, affecting the use of the mesh cloth. Summary of the Invention

[0004] The present application provides a coating material and preparation method for PVC mesh cloth. The prepared coating material has excellent fluidity, can be evenly coated on the surface of the mesh cloth, and has good adhesion to the mesh cloth. It will not clog the holes of the mesh cloth, but can adhere to the surface of the mesh cloth to enhance the overall strength of the mesh cloth.

[0005] The present application provides a coating material for PVC mesh cloth using the following technical solution:

[0006] A coating material for PVC mesh cloth, comprising the following raw materials in parts by weight: 90-110 parts of PVC resin powder, 25-50 parts of viscosity adjusting agent, 0.5-1.5 parts of dispersant, 6.5-8 parts of plasticizer, and 6-12 parts of processing aid;

[0007] The viscosity adjusting agent comprises 2-4 parts of base oil, 1-3 parts of petroleum sulfonate, 1-2 parts of amino acid and 15-25 parts of filler.

[0008] Furthermore, the plasticizer is diisononyl phthalate.

[0009] By adopting the above technical solution, PVC resin powder is selected as the main material, which has excellent compatibility with the mesh cloth and excellent adhesion. The viscosity regulator can effectively adjust the viscosity of the material, improve the fluidity of the material, and make it easier to be coated on the surface of the mesh cloth. At the same time, it can ensure the adhesion between the material and the mesh cloth, so that a uniform coating is formed. The dispersant can make the components evenly dispersed to prevent aggregation and precipitation. It cooperates with the viscosity regulator to improve the fluidity and stability of the material.

[0010] Petroleum sulfonates not only improve the material's wetting properties but also contain sulfonic acid groups, which can form hydrogen bonds with amino, carboxyl, and hydroxyl groups in the material, introducing steric hindrance into the molecular structure. This not only maintains stability but also increases the spacing between molecules, reduces intermolecular interactions, and improves component fluidity. The combination of base oil and filler not only provides a certain lubrication effect, improving material fluidity, but also enhances adhesion between the material and the substrate.

[0011] Plasticizers can improve the coating's softness and ductility, enhance its tensile strength, reduce cracking, and help improve the adhesion between the coating and the substrate, allowing the coating to firmly adhere to the substrate surface. Processing aids can further improve the material's processing properties, adjust the material's stability, and enhance the coating's weather resistance.

[0012] Preferably, the base oil includes one of soybean oil, hydrogenated oil and palm oil.

[0013] As the base oil, soybean oil or hydrogenated oil is more preferably used.

[0014] By adopting the above technical solution, the base oil helps to improve the softness and ductility of the material, improve its processing performance, and can control the viscosity of the material to a certain extent, making it easier to evenly coat it on the surface of the mesh cloth.

[0015] Preferably, the dispersant is polyoxyethylene ether.

[0016] Furthermore, the polyoxyethylene ethers include fatty alcohol polyoxyethylene ethers and alkylphenol polyoxyethylene ethers, and specifically, dodecyl polyoxyethylene ether is preferred.

[0017] By adopting the above technical solution, polyoxyethylene ether is an excellent surfactant that can assist in uniform dispersion of PVC resin powder, prevent particle agglomeration, and improve the uniformity and stability of the material.

[0018] Preferably, the amino acid includes at least one of lysine, glutamic acid, and phenylalanine.

[0019] Preferably, the amino acid is a mixture of lysine, glutamic acid and phenylalanine, and the mass ratio of lysine, glutamic acid and phenylalanine is 1:(0.5-1)(0.3-0.8).

[0020] By adopting the above technical solution, lysine, glutamic acid and phenylalanine play a good role in adjusting viscosity, and cooperate with sodium petroleum sulfonate to improve the fluidity of the material, which is conducive to better coating of the coating material on the surface of the mesh cloth, while also ensuring the adhesion between the material and the substrate.

[0021] Preferably, the processing aid includes 3-6 parts of stabilizer, 1-2 parts of antioxidant, and 2-4 parts of mildew inhibitor.

[0022] Furthermore, the stabilizer is preferably a barium zinc stabilizer, the antioxidant is antioxidant 1010 or antioxidant 2246, and the mildew preventer is 1,2-benzisohex-3-one.

[0023] By adopting the above technical solutions and selecting appropriate processing aids, the overall quality of the coating material can be further improved.

[0024] Preferably, the filler includes at least one of fumed silica, calcium carbonate, and talc.

[0025] By adopting the above technical solution, fumed silica has a large specific surface area and pore structure, which can effectively absorb liquids and form a stable gel-like substance to adjust the viscosity and consistency of the material, while improving its rheological properties, making it easier to adhere to the material surface and form a uniform coating. Calcium carbonate is low-cost, has fine particles and a large specific surface area. It is filled between the resin powder particles, forming a network structure during coating, and improving the adhesion of the material to the substrate. Talc powder not only improves the coating performance and adhesion of the material, making it easier for the coating material to form a uniform coating on the surface of the mesh cloth, but also has certain heat-insulating and flame-retardant properties, which can improve the flame retardancy of the mesh cloth to a certain extent.

[0026] In a second aspect, the present application provides a method for preparing a coating material for PVC mesh cloth, which adopts the following technical solution:

[0027] A method for preparing a coating material for PVC mesh cloth comprises the following steps:

[0028] PVC resin powder is dissolved in a solvent to form a paste to obtain a PVC paste, wherein the mass ratio of the PVC resin powder to the solvent is 1:(1-2); the filler and the base oil are uniformly stirred using an ultrasonic coupling machine, and sodium petroleum sulfonate and amino acid are added and mixed to obtain a viscosity adjusting agent;

[0029] The PVC paste is stirred and mixed evenly with a viscosity adjusting agent, a dispersant, a plasticizer and a processing aid to obtain a coating material.

[0030] By adopting the above technical solution, PVC resin powder is first dissolved in a solvent to form a paste. The paste-like PVC resin has good adhesion properties. The filler and base oil are mechanically stirred using ultrasonic coupling, which not only allows the base oil and filler to fully contact each other, but also forms a viscosity regulator with good rheological properties with the combination of sodium petroleum sulfonate and amino acid. After the PVC paste is mixed with the viscosity regulator, dispersant, plasticizer and processing aid, the fluidity of the material can be effectively adjusted and good adhesion can be ensured.

[0031] Preferably, the solvent is one of acetone, toluene and xylene.

[0032] Furthermore, the solvent is preferably acetone, which is widely available, low in cost, and has good solubility in PVC resin powder.

[0033] Preferably, the ultrasonic conditions are: ultrasonic power of 160-220 W, ultrasonic frequency of 100-200 kHz, and mechanical stirring speed of 800-1200 rpm.

[0034] By adopting the above technical solution, the ultrasonic conditions and stirring speed are optimized, which is beneficial to the dispersion uniformity between the raw material components and obtains a coating material with better overall quality.

[0035] In summary, this application has the following beneficial effects:

[0036] 1. Petroleum sulfonates not only improve the material's wetting properties but also contain sulfonic acid groups, which can form hydrogen bonds with amino, carboxyl, and hydroxyl groups in the material, introducing steric hindrance into the molecular structure. This not only maintains stability but also increases the spacing between molecules, reduces intermolecular interactions, and improves component fluidity. The combination of base oil and filler not only provides a certain lubrication effect, improving material fluidity, but also enhances adhesion between the material and the substrate.

[0037] 2. PVC resin powder is selected as the main material, which has excellent compatibility with the mesh cloth and excellent adhesion. The viscosity adjuster can effectively adjust the viscosity of the material, improve the fluidity of the material, and make it easier to coat on the surface of the mesh cloth. At the same time, it can ensure the adhesion between the material and the mesh cloth, so that it forms a uniform coating. The dispersant can make the components evenly dispersed to prevent aggregation and precipitation. It works together with the viscosity adjuster to improve the fluidity and stability of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a sample photo of a mesh coated with the coating material of Example 6.

[0039] Figure 2 This is a sample photo of a mesh coated with the coating material of Comparative Example 1. DETAILED DESCRIPTION

[0040] The embodiments of the present invention will be described in detail below with reference to the examples. However, those skilled in the art will appreciate that the following examples are intended to illustrate the present invention only and are not to be construed as limiting the scope of the invention. Any specific conditions not specified in the examples were carried out according to conventional conditions or those recommended by the manufacturer. Reagents and instruments used, for which the manufacturer is not indicated, are commercially available conventional products. Among them, the alkylphenol polyoxyethylene ether has a CAS number of 9002-93-1, the barium zinc stabilizer is purchased from Wuxi Henderson Chemical Products Co., Ltd., model number 105-48, and the filler particle size is all in the micron range.

[0041] Example

[0042] Example 1

[0043] A coating material for PVC mesh cloth, comprising the following raw materials: 9 kg of PVC resin powder, 2.5 kg of viscosity adjusting agent, 0.05 kg of dispersant, 0.65 kg of plasticizer, and 0.6 kg of processing aid;

[0044] The plasticizer is diisononyl phthalate; the dispersant is alkylphenol polyoxyethylene ether with CAS number 9002-93-1; the processing aids include 0.3kg of barium zinc stabilizer, 0.1kg of 1010 antioxidant, and 0.2kg of mildewproof agent 1,2-benzisohex-3-one; the viscosity adjuster includes 0.2kg of base oil, 0.1kg of sodium petroleum sulfonate, 0.2kg of amino acid and 1.5kg of filler; the base oil is soybean oil, the amino acid is lysine, and the filler is calcium carbonate.

[0045] The preparation method of the coating material for PVC mesh cloth comprises the following steps:

[0046] The PVC resin powder is dissolved in a solvent to form a paste to obtain a PVC paste, wherein the mass ratio of the PVC resin powder to the solvent is 1:2, and the solvent is acetone;

[0047] The filler and base oil were uniformly stirred by ultrasonic coupling, and sodium petroleum sulfonate and amino acid were added and mixed to obtain a viscosity adjusting agent; the ultrasonic power was 160W, the ultrasonic frequency was 100kHz, and the mechanical stirring speed was 1200rpm;

[0048] The PVC paste is stirred and mixed evenly with a viscosity adjusting agent, a dispersant, a plasticizer and a processing aid to obtain a coating material.

[0049] Example 2

[0050] A coating material for PVC mesh cloth, comprising the following raw materials: 11 kg of PVC resin powder, 5 kg of viscosity adjusting agent, 0.15 kg of dispersant, 0.8 kg of plasticizer, and 1.2 kg of processing aid;

[0051] The plasticizer is diisononyl phthalate; the dispersant is alkylphenol polyoxyethylene ether with CAS number 9002-93-1; the processing aids include 0.6 kg of barium zinc stabilizer, 0.2 kg of 2246 antioxidant, and 0.4 kg of mildewproof agent 1,2-benzisohex-3-one; the viscosity adjuster includes 0.4 kg of base oil, 0.3 kg of sodium petroleum sulfonate, 0.1 kg of amino acid and 2.5 kg of filler; the base oil is palm oil, the amino acids are lysine and glutamic acid in a mass ratio of 1:1, and the filler is calcium carbonate.

[0052] Example 3

[0053] The difference from Example 1 is that the coating material for PVC mesh cloth includes the following raw materials: 10 kg of PVC resin powder, 3.5 kg of viscosity adjusting agent, 0.1 kg of dispersant, 0.7 kg of plasticizer, and 0.9 kg of processing aid;

[0054] The plasticizer is diisononyl phthalate; the dispersant is dodecyl polyoxyethylene ether; the processing aids include 0.45kg of barium zinc stabilizer, 0.15kg of 2246 antioxidant, and 0.3kg of antifungal agent 1,2-benzisohex-3-one;

[0055] The rest are the same as in Example 1.

[0056] Example 4

[0057] The difference from Example 3 is that the viscosity adjusting agent includes 0.35 kg of base oil, 0.2 kg of sodium petroleum sulfonate, 0.18 kg of amino acid and 2 kg of filler; the rest is the same as Example 3.

[0058] Example 5

[0059] The difference from Example 4 is that the base oil is hydrogenated oil, the filler is fumed silica and talc in a mass ratio of 1:1, the amino acid is glutamic acid and phenylalanine in a mass ratio of 0.5:0.3, and the rest is the same as Example 4.

[0060] Example 6

[0061] The difference from Example 5 is that the base oil is soybean oil, the filler is fumed silica, talc and calcium carbonate in a mass ratio of 1:1:2, and the amino acid is lysine and glutamic acid in a mass ratio of 1:1:0.8. The rest is the same as Example 5.

[0062] Example 7

[0063] The difference from Example 6 is that the method for preparing the coating material for PVC mesh cloth comprises the following steps:

[0064] The PVC resin powder is dissolved in a solvent to form a paste to obtain a PVC paste, wherein the mass ratio of the PVC resin powder to the solvent is 1:1, and the solvent is toluene;

[0065] The filler and base oil were uniformly stirred by ultrasonic coupling, and sodium petroleum sulfonate and amino acid were added and mixed to obtain a viscosity adjusting agent; the ultrasonic power was 220W, the ultrasonic frequency was 200kHz, and the mechanical stirring speed was 800rpm;

[0066] The PVC paste is stirred and mixed evenly with a viscosity adjusting agent, a dispersant, a plasticizer and a processing aid to obtain a coating material;

[0067] The rest are the same as in Example 6.

[0068] Comparative Example

[0069] Comparative Example 1

[0070] The difference from Example 6 is that sodium petroleum sulfonate is not added, and the rest is the same as Example 6.

[0071] Comparative Example 2

[0072] The difference from Example 6 is that an equal amount of amino acid is replaced by calcium carbonate powder, and the rest is the same as Example 6.

[0073] Comparative Example 3

[0074] The difference from Example 6 is that the added amount of the viscosity adjusting agent is 6.5 kg, and the rest is the same as Example 6.

[0075] Comparative Example 4

[0076] The difference from Example 6 is that the added amount of the viscosity adjusting agent is 1 kg, and the rest is the same as Example 6.

[0077] Performance testing

[0078] Take a mesh of the same size, apply the coating materials prepared in Example 6 and Comparative Example 1 by horizontal brushing, and then dry at a constant temperature of 37°C. Record the sample image of the mesh, as shown in the figure below. Figure 1 and Figure 2 shown.

[0079] A funnel was used for the flow rate test. The funnel specifications were: upper diameter 100 mm, bottom diameter 10 mm, and height 50 mm.

[0080] The test steps are as follows: rinse the funnel with clean water and dry it, then place it on a stand so that its top surface is horizontal and its body is vertical. Ensure that the funnel is stable, close the funnel outlet, pour the corresponding coating material into the funnel, and use a scraper to flatten the top surface of the material along the upper end of the funnel. After standing for 10±2s, quickly open the funnel outlet and use a stopwatch to record the time from the moment the funnel outlet is opened to the time when all the coating material in the funnel is emptied. Perform three parallel tests on each sample, take the average of the three test results as the test result, and the results are accurate to 0.1s. Record each result in Table 1.

[0081] Table 1

[0082] Flow rate / s Example 1 15.3 Example 2 16.1 Example 3 14.5 Example 4 14.2 Example 5 15.1 Example 6 14.9 Example 7 15.8 Comparative Example 1 17.9 Comparative Example 2 22.4 Comparative Example 3 12.1 Comparative Example 4 24.7

[0083] In combination with Examples 1-7 and Table 1, it can be seen that the coating material obtained in the present application has excellent fluidity, can be evenly coated on the surface of the mesh cloth, and has good adhesion to the mesh cloth. It will not clog the holes of the mesh cloth, but can adhere to the surface of the mesh cloth to enhance the overall strength of the mesh cloth.

[0084] Combining Example 6 with Comparative Example 1 and Table 1, it can be seen that the lack of sodium petroleum sulfonate in Comparative Example 1 results in poor fluidity of the entire coating material. Figure 1 and Figure 2 It can be clearly seen that after coating with the coating material prepared in Example 6, the holes of the mesh cloth are clear, there is no blockage, the coating is uniform, and the adhesion between the material and the mesh cloth is good. However, the coating material of Comparative Example 1 has an inappropriate viscosity and poor fluidity, resulting in a slight blockage in the mesh cloth, and the coating is somewhat uneven.

[0085] Therefore, in combination with Example 6 and Comparative Examples 1-4 and Table 1, it can be seen that whether the components of the viscosity modifier are adjusted or the amount of the viscosity modifier in the coating material is adjusted, the fluidity of the coating material is significantly poor, the viscosity of the material is poor, and the quality of the resulting mesh cloth is also significantly reduced. This is because petroleum sulfonates can not only improve the wetting properties of the material, but also contain sulfonic acid groups. The sulfonic acid groups can form hydrogen bonds with amino groups, carboxyl groups, and hydroxyl groups in the material, introducing a steric hindrance effect in the molecular structure, which can maintain stability, increase the spacing between molecules, reduce the interaction between molecules, and improve the fluidity of the components. The combination of base oil and filler can not only play a certain lubricating role and improve the fluidity of the material, but also enhance the adhesion between the material and the substrate. PVC resin powder is selected as the main material, which has excellent compatibility with the mesh cloth and excellent adhesion. The viscosity adjuster of the present application can effectively adjust the viscosity of the material, improve the fluidity of the material, make it easier to apply to the surface of the mesh cloth, and at the same time ensure the adhesion between the material and the mesh cloth, so that it forms a uniform coating. The dispersant can make each component evenly dispersed to prevent aggregation and precipitation. It cooperates with the viscosity adjuster to jointly improve the fluidity and stability of the material. It can be seen that the raw material components of the present application cooperate with each other and complement each other to form a coating material with excellent fluidity, which can be evenly applied to the surface of the mesh cloth and has good adhesion to the mesh cloth. It will not clog the holes of the mesh cloth and can adhere to the surface of the mesh cloth to enhance the overall strength of the mesh cloth.

[0086] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A coating material for PVC mesh cloth, characterized in that: The raw materials include the following parts by weight: 90-110 parts of PVC resin powder, 25-50 parts of viscosity adjusting agent, 0.5-1.5 parts of dispersant, 6.5-8 parts of plasticizer, and 6-12 parts of processing aid; The viscosity adjusting agent comprises 2-4 parts of base oil, 1-3 parts of petroleum sulfonate, 1-2 parts of amino acid and 15-25 parts of filler.

2. The coating material for PVC mesh cloth according to claim 1, characterized in that: The base oil includes one of soybean oil, hydrogenated oil and palm oil.

3. The coating material for PVC mesh cloth according to claim 1, characterized in that: The dispersant is polyoxyethylene ether.

4. The coating material for PVC mesh cloth according to claim 1, characterized in that: The amino acid includes at least one of lysine, glutamic acid and phenylalanine.

5. The coating material for PVC mesh cloth according to claim 4, characterized in that: The amino acid is a mixture of lysine, glutamic acid and phenylalanine, and the mass ratio of the lysine, glutamic acid and phenylalanine is 1:(0.5-1)(0.3-0.8).

6. The coating material for PVC mesh cloth according to any one of claims 1 to 5, characterized in that: The processing aids include 3-6 parts of stabilizer, 1-2 parts of antioxidant and 2-4 parts of mildew inhibitor.

7. The coating material for PVC mesh cloth according to claim 6, characterized in that: The filler includes at least one of fumed silica, calcium carbonate, and talc.

8. The method for preparing the coating material for PVC mesh cloth according to any one of claims 1 to 7, characterized in that: The following steps are involved: Dissolving PVC resin powder in a solvent to form a paste to obtain a PVC paste, wherein the mass ratio of the PVC resin powder to the solvent is 1:(1-2); The filler and the base oil are uniformly stirred by an ultrasonic coupling machine, and sodium petroleum sulfonate and amino acid are added and mixed uniformly to obtain a viscosity adjusting agent; The PVC paste is stirred and mixed evenly with a viscosity adjusting agent, a dispersant, a plasticizer and a processing aid to obtain a coating material.

9. The method for preparing a coating material for PVC mesh cloth according to claim 8, characterized in that: The solvent is one of acetone, toluene and xylene.

10. The method for preparing a coating material for PVC mesh cloth according to claim 8, wherein: The ultrasonic conditions are as follows: ultrasonic power of 160-220 W, ultrasonic frequency of 100-200 kHz, and mechanical stirring speed of 800-1200 rpm.

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