Solvent-free epoxy anti-static floating colored sand self-leveling finish and preparation method thereof

Abstract

The solvent-free epoxy anti-static floating colored sand self-leveling finish paint and the preparation method thereof belong to the technical field of epoxy anti-static floor and comprise: A component containing single-walled carbon nanotube conductive paste and anti-static floating resin colored sand, B component containing modified alicyclic amine and C component containing one of quartz sand, emery and hollow glass microbeads, wherein the raw materials of the single-walled carbon nanotube conductive paste in the A component are pretreated by 19-23 kHz ultrasonic wave for 10 minutes. 6 ~1x10 9 Ω of the standard of GB / T 22374-2018 floor coating materials, and can also meet the demand of clean workshop for material surface roughness, and has greater tolerance for product color diversity.

Description

Technical Field

[0001] This invention belongs to the field of epoxy antistatic flooring technology, specifically relating to a solvent-free epoxy antistatic floating colored sand self-leveling surface paint and its preparation method. Background Technology

[0002] In high-end manufacturing, with the increasing demand for electrostatic protection, epoxy antistatic self-leveling and antistatic ultra-wear-resistant products have been widely used. However, while achieving functionality, these products often sacrifice some aesthetics. In particular, the conductive materials used limit the diversity of colors, currently mostly only allowing for darker shades, making it difficult to meet the market's demand for a wider range of colors and higher decorative appeal.

[0003] Patent application CN111777913A discloses a method for preparing electrostatic protective epoxy self-leveling colored sand, but this technical solution has the following problems:

[0004] 1. The paint color is too dark: Because conductive graphite is used as the conductive material, the product is dark in color, which limits its use in decorative applications that require lighter colors.

[0005] 2. Surface smoothness issues: With colored sand accounting for over 40%, this not only increases the difficulty of construction but also makes it more prone to sand leakage and agglomeration on uneven substrates. This results in an uneven and rough final coating surface, failing to meet the high cleanliness and aesthetic requirements of cleanrooms. Summary of the Invention

[0006] The purpose of this invention is to overcome the problems of excessively dark paint colors and uneven surface smoothness in existing products, and to provide a solvent-free epoxy antistatic floating colored sand self-leveling surface paint and its preparation method. The technical solution of this invention meets the antistatic performance of 1×10⁻⁶ in the GB / T 22374-2018 standard for floor coating materials. 6 ~1×10 9 Under the requirement of Ω electrostatic dissipation, it can also meet the requirements of cleanroom for material surface roughness, and at the same time, it has a greater tolerance for product color diversity.

[0007] To solve the above problems, the present invention is achieved through the following technical solution:

[0008] The first objective of this invention is:

[0009] A solvent-free epoxy antistatic floating colored sand self-leveling surface paint is provided, comprising the following components in parts by weight:

[0010] Component A:

[0011] 30-40 parts resin, 3-4 parts benzyl alcohol, 4-5 parts ethylene glycol glycidyl ether, 0.3-0.5 parts dispersant, 0.03-0.2 parts single-walled carbon nanotube conductive paste, 0.2-1 parts defoamer, 0.1-0.5 parts leveling agent, 0.1-0.5 parts anti-settling agent, 30-40 parts barium sulfate, 0.1-0.5 parts wax powder, 10-20 parts antistatic floating resin colored sand, and 2-5 parts color paste;

[0012] The resin mentioned is one of Nan Ya 128 epoxy resin, Yang Nong YN-1828 resin, or Aimont EMTE 128 epoxy resin;

[0013] Component B: 100 parts of 5-amino-1,3,3-trimethylcyclohexanemethylamine;

[0014] Component C: 100 parts of one of the following: 80-120 mesh quartz sand, 80-120 mesh corundum, or 80-120 mesh hollow glass microspheres;

[0015] The weight ratio of components A, B, and C is 4–6:1:0.65–1;

[0016] The single-walled carbon nanotube conductive paste comprises the following components in parts by weight:

[0017] 2-5 parts polymer dispersant, 1-2 parts sodium dodecyl sulfate, 94-96 parts 2-N-methylpyrrolidone (NMP), and 2-5 parts single-walled carbon nanotubes (SWCNTs);

[0018] The polymer dispersant is one of Lubrizol 5000S, BYK-110, and Uniqsperse 560S dispersants;

[0019] The raw materials of the single-walled carbon nanotube conductive paste were pretreated with ultrasound at 19-23 kHz for 10 minutes.

[0020] The antistatic floating resin colored sand comprises the following components in parts by weight:

[0021] 70-80 parts PMMA resin, 3-5 parts nitrile rubber, 5-8 parts single-walled carbon nanotube conductive paste, 2-3 parts triphenyl phosphate, 5-10 parts silica powder, and 2-8 parts pigment.

[0022] The solvent-free epoxy antistatic floating colored sand self-leveling surface paint of the present invention is further optimized as follows:

[0023] The PMMA resin mentioned is Asahi Kasei SR8500. One of MG555 and LG Chem HI535 resins.

[0024] The second objective of this invention is:

[0025] A method for preparing the solvent-free epoxy antistatic floating colored sand self-leveling surface paint described above is provided, which includes the following preparation steps:

[0026] S1. Mix the resin, benzyl alcohol, ethylene glycol glycidyl ether, dispersant and single-walled carbon nanotube conductive paste in proportion, and stir at 2000-2500 rpm for 30 minutes to disperse;

[0027] S2. Add defoamer, leveling agent and anti-settling agent, and disperse at 1000-1600 rpm for 10 minutes;

[0028] S3. Add barium sulfate and wax powder, and disperse again at 2000-2500 rpm for 30 minutes;

[0029] S4. Add antistatic floating resin colored sand and color paste, and disperse at 1000-1600 rpm for 20 minutes to obtain component A;

[0030] Components A, B, and C are mixed in a specific ratio to prepare the solvent-free epoxy antistatic floating colored sand self-leveling surface paint.

[0031] The preparation method of the solvent-free epoxy antistatic floating colored sand self-leveling surface paint of the present invention is further optimized as follows:

[0032] The preparation method of the single-walled carbon nanotube conductive paste:

[0033] It includes the following preparation steps:

[0034] A1. Add the polymer dispersant and sodium dodecyl sulfate to 2-N-methylpyrrolidone in proportion, and mechanically disperse at 1000-1600 rpm for 10 minutes;

[0035] A2. Add single-walled carbon nanotubes and continue mechanical dispersion at 1000-1600 rpm for 10 minutes;

[0036] A3. Pre-treat the above mixture with ultrasound at 19-23 kHz for 10 minutes;

[0037] A4. Grind the ultrasonically treated mixture using a horizontal sand mill for 20 minutes;

[0038] A5. The ground mixture was filtered through a 300μm filter to obtain a single-walled carbon nanotube conductive paste.

[0039] The preparation method of the solvent-free epoxy antistatic floating colored sand self-leveling surface paint of the present invention is further optimized as follows:

[0040] The preparation method of the aforementioned antistatic floating resin colored sand:

[0041] It includes the following preparation steps:

[0042] B1. Gradually heat the PMMA resin to 200℃ according to the ratio to soften it and avoid automatic decomposition or uneven melting.

[0043] B2. Further heat the PMMA resin to 220°C to ensure it is completely melted and flows uniformly;

[0044] B3. Add nitrile rubber, single-walled carbon nanotube conductive paste, triphenyl phosphate, silica powder and pigment to molten PMMA resin, and mechanically disperse at 1000-1600 rpm for 20 minutes to mix evenly.

[0045] B4. Reheat the mixture to 230°C, extrude it through a screw extruder, then crush and sieve it into 40-80 mesh resin sand particles to obtain the antistatic floating resin colored sand.

[0046] The technical solution of the present invention has the following beneficial effects:

[0047] 1. Due to their high conductivity and excellent dispersibility after ultrasonic treatment, single-walled carbon nanotubes have little impact on the color of paint when added in small amounts, thus maintaining the aesthetic appeal of the product.

[0048] 2. By utilizing antistatic floating resin colored sand (antistatic lightweight resin colored sand) and precisely controlling the density of antistatic floating resin colored sand and the density of component A in solvent-free epoxy antistatic floating colored sand self-leveling paint, the resin colored sand is slowly floated to the upper layer of the paint film during the drying process, resulting in a smooth and even paint film surface while ensuring the stability of the electrical resistance.

[0049] 3. By adding quartz sand, corundum, or hollow glass microspheres, the mechanical properties of the paint film are improved. Furthermore, the interstitial conductive materials form a conductive network within the paint film, effectively reducing resistance and achieving a balance between color diversity and good resistance. Its mechanical and application properties meet the standards of GB / T22374-2018 for floor coating materials, and its antistatic performance meets the 1×10⁻⁶ standard. 6 ~1×10 9 The Ω-shaped electrostatic dissipation design ensures a seamless overall appearance, meeting the high standards of cleanrooms for both cleanliness and aesthetics.

[0050] The technical solution of this invention not only achieves the anti-static function of the product, but also meets the market's growing demand for decoration and aesthetics. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Any simple improvements to the preparation method of this invention based on the inventive concept are within the scope of protection of this invention.

[0052] Example 1

[0053] A method for preparing a solvent-free epoxy antistatic floating colored sand self-leveling surface paint, comprising the following components in parts by weight:

[0054] Component A:

[0055] 38 parts resin, 4 parts benzyl alcohol, 5 parts ethylene glycol glycidyl ether, 0.5 parts dispersant, 0.08 parts single-walled carbon nanotube conductive paste, 0.3 parts defoamer, 0.3 parts leveling agent, 0.1 parts anti-settling agent, 38.42 parts barium sulfate, 0.3 parts wax powder, 10 parts antistatic floating resin colored sand, and 3 parts color paste;

[0056] The resin mentioned is South Asia 128 epoxy resin;

[0057] Component B: 100 parts of 5-amino-1,3,3-trimethylcyclohexanemethylamine;

[0058] Component C: 100 parts of 80-120 mesh quartz sand;

[0059] The weight ratio of components A, B, and C is 4.5:1:1.

[0060] It includes the following preparation steps:

[0061] S1. Mix the resin, benzyl alcohol, ethylene glycol glycidyl ether, dispersant and single-walled carbon nanotube conductive paste in proportion, and stir at 2500 rpm for 30 minutes to disperse;

[0062] S2. Add defoamer, leveling agent and anti-settling agent, and disperse at 1600 rpm for 10 minutes;

[0063] S3. Add barium sulfate and wax powder, and disperse again at 2500 rpm for 30 minutes;

[0064] S4. Add antistatic floating resin colored sand and color paste, and disperse at 1600 rpm for 20 minutes to obtain component A;

[0065] Components A, B, and C are mixed in a ratio of 4.5:1:1 to prepare the solvent-free epoxy antistatic floating colored sand self-leveling surface paint.

[0066] The single-walled carbon nanotube conductive paste comprises the following components in parts by weight:

[0067] Lubrizol 5000S 2 parts, sodium dodecyl sulfate 1 part, 2-N-methylpyrrolidone (NMP) 95 parts, single-walled carbon nanotubes (SWCNT) 2 parts;

[0068] The preparation method of the single-walled carbon nanotube conductive paste:

[0069] It includes the following preparation steps:

[0070] A1. Add Lubrizol 5000S and sodium dodecyl sulfate to 2-N-methylpyrrolidone in proportion and mechanically disperse at 1600 rpm for 10 minutes;

[0071] A2. Add single-walled carbon nanotubes and continue mechanical dispersion at 1600 rpm for 10 minutes;

[0072] A3. Pre-treat the above mixture with ultrasound at 19-23 kHz for 10 minutes;

[0073] A4. Grind the ultrasonically treated mixture using a horizontal sand mill for 20 minutes;

[0074] A5. The ground mixture was filtered through a 300μm filter to obtain a single-walled carbon nanotube conductive paste.

[0075] The antistatic floating resin colored sand comprises the following components in parts by weight:

[0076] LG Chem HI535 PMMA resin 78 parts, nitrile rubber 3 parts, single-walled carbon nanotube conductive paste 7 parts, triphenyl phosphate 2 parts, silica powder 5 parts, pigment 5 parts.

[0077] The preparation method of the aforementioned antistatic floating resin colored sand:

[0078] It includes the following preparation steps:

[0079] B1. Gradually heat the PMMA resin to 200℃ according to the ratio to soften it and avoid automatic decomposition or uneven melting.

[0080] B2. Further heat the PMMA resin to 220°C to ensure it is completely melted and flows uniformly;

[0081] B3. Add nitrile rubber, single-walled carbon nanotube conductive paste, triphenyl phosphate, silica powder and pigment to molten PMMA resin, and mechanically disperse at 1600 rpm for 20 minutes to mix evenly;

[0082] B4. Reheat the mixture to 230°C, extrude it through a screw extruder, then crush and sieve it into 40-80 mesh resin sand particles to obtain antistatic floating resin colored sand.

[0083] The prepared solvent-free epoxy antistatic floating colored sand self-leveling surface paint has a yield of 2.0 kg / m³. 2 When applied to tinplate, the surface resistivity is 5.67 × 10⁻⁶. 6 ~9.87×10 6 It has a stable resistance with no blind spots, and the surface has uniform floating sand without floating color and a smooth and flat paint film.

[0084] Comparative Example 1

[0085] Comparative Example 1 and Example 1 have the same composition and preparation method, the difference being that: in Comparative Example 1, the preparation of the single-walled carbon nanotube conductive paste did not use ultrasonic pretreatment, and the actual preparation steps are as follows:

[0086] Add Lubrizol 5000S and sodium dodecyl sulfate to 2-N-methylpyrrolidone in the specified proportions and mechanically disperse at 1600 rpm for 10 minutes;

[0087] A2. Add single-walled carbon nanotubes and continue mechanical dispersion at 2500 rpm for 30 minutes;

[0088] A3. Grind the mixture using a horizontal sand mill for 20 minutes;

[0089] A4. The ground mixture was filtered through a 300μm filter to obtain a single-walled carbon nanotube conductive paste.

[0090] The paint film made from this conductive paste has a strength of 2.0 kg / m³. 2 When applied to tinplate, the surface resistivity is 1.89 × 10⁻⁶. 7 ~7.68×10 9 The resistance is high, with many blind spots and unstable resistance. Comparative Example 1 demonstrates that single-walled carbon nanotubes are difficult to disperse using ordinary mechanical methods, ultimately leading to a coating film with high resistance and many blind spots.

[0091] Comparative Example 2

[0092] Comparative Example 2 has the same composition and preparation method as Example 1, except that:

[0093] In Comparative Example 2, an equal amount of conventional 40-80 mesh PMMA resin colored sand was used to replace the antistatic floating resin colored sand in Example 1.

[0094] Paint films made with conventional PMMA resin tend to float to the surface during the curing process due to the low density of PMMA resin, thus blocking the conductive path and affecting the actual resistance. The paint film prepared in Comparative Example 2, with a density of 2.0 kg / m³, exhibits a different resistance. 2 When applied to tinplate, the surface resistivity is 8.98 × 10⁻⁶.8 ~5.16×10 10 It has a high resistance of ohms, but also many blind spots and unstable resistance.

[0095] Comparative Example 3

[0096] Comparative Example 3 has the same composition and preparation method as Example 1, except that:

[0097] In Comparative Example 3, the solvent-free epoxy antistatic floating colored sand self-leveling surface paint was applied without adding component C from Example 1. The weight ratio of components A and B was 4.5:1.

[0098] The paint film prepared by Comparative Example 3 has a coating strength of 2.0 kg / m². 2 When applied to tinplate, the surface resistivity is 5.12 × 10⁻⁶. 7 ~1.65×10 8 Ohms, no blind spots. This indicates that the quartz sand in component C not only improves the mechanical properties of the paint film, but also, through its interstitial interaction with conductive materials, forms a parallel conductive network within the film, effectively reducing resistance and achieving a balance between color diversity and good resistance.

[0099] In summary, the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any changes, modifications, and evolutions made by those skilled in the art without departing from the scope of the present invention based on the disclosed technical content shall be considered equivalent embodiments of the present invention. Furthermore, any changes, modifications, and evolutions made to the above embodiments based on the essential technology of the present invention shall still fall within the protection scope of the present invention.

[0100] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] Experimental methods not specified in this invention are generally performed under conventional conditions or as recommended by the manufacturer.

[0102] Unless otherwise stated, the various optimized technical solutions in this invention can be combined with each other.

[0103] Unless otherwise stated, percentages and parts are weight percentages and weight parts.

[0104] Experimental methods not specified in the instructions and examples are generally performed under standard conditions or as recommended by the manufacturer.

[0105] The various raw materials, reagents and components used in this invention are all commonly used raw materials in the field unless otherwise stated.

[0106] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as are familiar to those skilled in the art. Furthermore, any methods and materials similar to or equivalent to those described herein may be used in the methods of this invention.

Claims

1. A solvent-free epoxy antistatic floating colored sand self-leveling surface paint, characterized in that: It comprises the following components in parts by weight: Component A: 30-40 parts resin, 3-4 parts benzyl alcohol, 4-5 parts ethylene glycol glycidyl ether, 0.3-0.5 parts dispersant, 0.03-0.2 parts single-walled carbon nanotube conductive paste, 0.2-1 parts defoamer, 0.1-0.5 parts leveling agent, 0.1-0.5 parts anti-settling agent, 30-40 parts barium sulfate, 0.1-0.5 parts wax powder, 10-20 parts antistatic floating resin colored sand, and 2-5 parts color paste; The resin mentioned is one of Nan Ya 128 epoxy resin, Yang Nong YN-1828 resin, or Aimont EMTE 128 epoxy resin; Component B: 100 parts of 5-amino-1,3,3-trimethylcyclohexanemethylamine; Component C: 100 parts of one of the following: 80-120 mesh quartz sand, 80-120 mesh corundum, or 80-120 mesh hollow glass microspheres; The weight ratio of components A, B, and C is 4–6:1:0.65–1; The single-walled carbon nanotube conductive paste comprises the following components in parts by weight: 2-5 parts polymer dispersant, 1-2 parts sodium dodecyl sulfate, 94-96 parts 2-N-methylpyrrolidone, and 2-5 parts single-walled carbon nanotubes; The polymer dispersant is one of Lubrizol 5000S, BYK-110, and Uniqsperse 560S dispersants; The raw materials of the single-walled carbon nanotube conductive paste were pretreated with ultrasound at 19-23 kHz for 10 minutes. The antistatic floating resin colored sand comprises the following components in parts by weight: 70-80 parts PMMA resin, 3-5 parts nitrile rubber, 5-8 parts single-walled carbon nanotube conductive paste, 2-3 parts triphenyl phosphate, 5-10 parts silica powder, and 2-8 parts pigment.

2. The solvent-free epoxy antistatic floating colored sand self-leveling surface paint according to claim 1, characterized in that: The PMMA resin mentioned is Asahi Kasei SR8500. One of MG555 and LG Chem HI535 resins.

3. A method for preparing the solvent-free epoxy antistatic floating colored sand self-leveling surface paint according to claim 1, characterized in that: It includes the following preparation steps: S1. Mix the resin, benzyl alcohol, ethylene glycol glycidyl ether, dispersant and single-walled carbon nanotube conductive paste in proportion, and stir at 2000-2500 rpm for 30 minutes to disperse; S2. Add defoamer, leveling agent and anti-settling agent, and disperse at 1000-1600 rpm for 10 minutes; S3. Add barium sulfate and wax powder, and disperse again at 2000-2500 rpm for 30 minutes; S4. Add antistatic floating resin colored sand and color paste, and disperse at 1000-1600 rpm for 20 minutes to obtain component A; Components A, B, and C are mixed in a specific ratio to prepare the solvent-free epoxy antistatic floating colored sand self-leveling surface paint.

4. The method for preparing solvent-free epoxy antistatic floating colored sand self-leveling surface paint according to claim 3, characterized in that: The preparation method of the single-walled carbon nanotube conductive paste: It includes the following preparation steps: A1. Add the polymer dispersant and sodium dodecyl sulfate to 2-N-methylpyrrolidone in proportion, and mechanically disperse at 1000-1600 rpm for 10 minutes; A2. Add single-walled carbon nanotubes and continue mechanical dispersion at 1000-1600 rpm for 10 minutes; A3. Pre-treat the above mixture with ultrasound at 19-23 kHz for 10 minutes; A4. Grind the ultrasonically treated mixture using a horizontal sand mill for 20 minutes; A5. The ground mixture was filtered through a 300μm filter to obtain a single-walled carbon nanotube conductive paste.

5. The method for preparing solvent-free epoxy antistatic floating colored sand self-leveling surface paint according to claim 3, characterized in that: The preparation method of the aforementioned antistatic floating resin colored sand: It includes the following preparation steps: B1. Gradually heat the PMMA resin to 200℃ according to the ratio to soften it and avoid automatic decomposition or uneven melting. B2. Further heat the PMMA resin to 220°C to ensure it is completely melted and flows uniformly; B3. Add nitrile rubber, single-walled carbon nanotube conductive paste, triphenyl phosphate, silica powder and pigment to molten PMMA resin, and mechanically disperse at 1000-1600 rpm for 20 minutes to mix evenly. B4. Reheat the mixture to 230°C, extrude it through a screw extruder, then crush and sieve it into 40-80 mesh resin sand particles to obtain the antistatic floating resin colored sand.

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