High sound insulation type sound-absorbing paint and preparation method thereof

Abstract

The application discloses a high-sound-insulation sound-absorbing coating and a preparation method thereof, and relates to the technical field of polysiloxane coatings. The high-sound-insulation sound-absorbing coating comprises the following raw materials in parts by weight: 25-28 parts of an acrylic emulsion, 13-15 parts of a polyurethane emulsion, 5-8 parts of polysiloxane, 0.8-1.2 parts of a dispersing agent, 1-3 parts of an antistatic agent, 5-8 parts of a curing agent, 0.2-0.3 parts of a curing accelerator, 25-30 parts of deionized water, 5-8 parts of a reinforcing modifier, 5-8 parts of silica aerogel, 10-15 parts of sound-insulation fillers and 2-5 parts of a thickening agent. The high-sound-insulation sound-absorbing coating prepared by the application has excellent wear resistance, antistatic performance and sound insulation performance.

Description

Technical Field

[0001] This invention relates to the field of polysiloxane coating technology, specifically to a high sound insulation and sound absorption coating and its preparation method. Background Technology

[0002] With the accelerating pace of urbanization, problems such as traffic noise, industrial noise, and noise from equipment operation inside buildings are becoming increasingly prominent. Noise pollution has become a significant environmental factor affecting people's quality of life and physical and mental health. Especially in residential buildings, office spaces, commercial spaces, schools, hospitals, and public buildings, higher requirements are being placed on the sound insulation and sound absorption performance of buildings. In recent years, sound-absorbing coatings have gradually gained attention due to their advantages such as convenient construction, strong decorative properties, and good adaptability to substrates. Sound-absorbing coatings typically achieve sound absorption by introducing porous structures or lightweight fillers into the coating, allowing sound waves to enter the pores and undergo reflection, friction, and energy dissipation. However, increasing porosity or the content of lightweight fillers to improve sound absorption often leads to a decrease in the coating's mechanical strength, insufficient wear resistance, and durability, affecting long-term performance. Furthermore, some sound-absorbing and insulating coatings have high surface resistivity in practical applications, making them prone to static electricity accumulation under friction or equipment operation. Unstable static electricity release can easily cause safety hazards in flammable and explosive environments.

[0003] Chinese invention patent CN114958096A discloses a sound-insulating coating, its preparation method, and a sound-insulating building. The sound-insulating coating comprises the following raw materials by weight: 200-250 parts water; 60-80 parts coal slag; 100-120 parts filler; 80-100 parts metal powder; 80-120 parts aggregate; 60-100 parts pumice particles; 240-250 parts rubber latex; 100-150 parts reed straw particles; and 7.5-9.5 parts processing aids. The density of the metal powder is in the range of 7.5 g / cm³. 2 -11.5g / cm 2 The components in the coating of this application work synergistically to achieve good sound insulation, with high safety and good adhesion strength and durability. It overcomes the problems of easy detachment and cracking of sound insulation mortar and the volatilization of fine harmful fibers from sound insulation fibers. However, its sound insulation performance still needs to be improved.

[0004] Therefore, there is an urgent need to develop a high-sound-insulating and sound-absorbing coating that combines good mechanical properties and antistatic properties to meet the needs of modern buildings for acoustic environment and functional integration. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a high-sound-insulating sound-absorbing coating and its preparation method.

[0006] A high sound insulation and sound-absorbing coating comprises the following raw materials in parts by weight: 25-28 parts acrylic emulsion, 13-15 parts polyurethane emulsion, 5-8 parts polysiloxane, 0.8-1.2 parts dispersant, 1-3 parts antistatic agent, 5-8 parts curing agent, 0.2-0.3 parts curing accelerator, 25-30 parts deionized water, 5-8 parts reinforcing modifier, 5-8 parts silica aerogel, 10-15 parts sound insulation filler, and 2-5 parts thickener; The structural formula of the reinforcing modifier is as follows: ; The antistatic agent has the following structural formula: .

[0007] The reinforcing modifier is prepared by the following method: S1: N-p-hydroxyphenylacrylamide reacts with D-allylglycine to generate intermediate 1, and the reaction equation is shown below:

[0008] S2: Intermediate 1 reacts with lipoic acid to generate intermediate 2, and the reaction equation is shown below:

[0009] S3: Intermediate 2 reacts with γ-mercaptopropyltrimethoxysilane to generate a reinforcing modifier, and the reaction equation is shown below:

[0010] In step S1, the molar ratio of N-p-hydroxyphenylacrylamide to D-allylglycine is (2.05-2.08):1.

[0011] In step S2, the molar ratio of intermediate 1 to thioctic acid is 1:(2.05-2.1).

[0012] In step S3, the molar ratio of intermediate 2 to γ-mercaptopropyltrimethoxysilane is 1:(1.04-1.06).

[0013] The antistatic agent is prepared by the following method: N1: The reaction of dodecyl dimethyl tertiary amine with 2-(2-(2-(2-(2-chloroethoxy)ethoxy)ethoxy)acetic acid yields a quaternary ammonium salt compound, and the reaction equation is shown below:

[0014] N2: The reaction of quaternary ammonium salt compounds with N,N,N',N'-tetracyclooxypropyl-4,4'-diaminodiphenylmethane yields an antistatic agent, as illustrated in the following reaction equation:

[0015] In step N1, the molar ratio of the dodecyl dimethyl tertiary amine to 2-(2-(2-(2-chloroethoxy)ethoxy)ethoxy)acetic acid is 1:1.05; in step N2, the molar ratio of the quaternary ammonium salt compound to N,N,N',N'-tetracyclooxypropyl-4,4'-diaminodiphenylmethane is 4.1:1.

[0016] The sound-insulating filler is a mixture of mica powder, glass microspheres and hollow ceramic microspheres in a mass ratio of 3:1:1; the thickener is hydroxyethyl cellulose.

[0017] The dispersant is a mixture of sodium hexametaphosphate and sodium polycarboxylate in a mass ratio of 1:1; the curing agent is the waterborne polyurethane curing agent Bayhydur XP 2655; and the curing accelerator is zinc octanoate.

[0018] A method for preparing a high sound insulation and sound-absorbing coating includes the following steps: (1) Weigh out the following by weight: 25-28 parts acrylic emulsion, 13-15 parts polyurethane emulsion, 5-8 parts polysiloxane, 0.8-1.2 parts dispersant, 1-3 parts antistatic agent, 5-8 parts curing agent, 0.2-0.3 parts curing accelerator, 25-30 parts deionized water, 5-8 parts reinforcing modifier, 5-8 parts silica aerogel, 10-15 parts sound insulation filler, and 2-5 parts thickener; (2) Stir and mix deionized water and reinforcing modifier, add silica aerogel and sound insulation filler and stir, add thickener and stir and mix to obtain slurry; stir and mix acrylic emulsion, polyurethane emulsion, polysiloxane, dispersant and antistatic agent, add to slurry and disperse at high speed to obtain component A; stir and mix curing agent and curing accelerator to obtain component B; add component B to component A and stir and mix to obtain high sound insulation sound absorption coating.

[0019] Due to the adoption of the above technical solutions, the beneficial effects of the present invention include: The high sound insulation type sound-absorbing coating prepared by this invention has excellent wear resistance, antistatic properties and sound insulation properties. Attached Figure Description

[0020] Figure 1 The image shows the 1H NMR spectrum of the reinforcing modifier prepared in Example 1.

[0021] Figure 2 The image shows a high-resolution mass spectrum of the reinforcing modifier prepared in Example 1.

[0022] Figure 3 The image shows the proton NMR spectrum of the antistatic agent prepared in Example 4.

[0023] Figure 4 The image shows a high-resolution mass spectrum of the antistatic agent prepared in Example 4. Detailed Implementation

[0024] Example 1: Preparation of the reinforcing modifier S1: 250 ml methanol, 0.205 mol N-p-hydroxyphenylacrylamide, 0.1 mol D-allylglycine, 0.2 mol triethylamine, and 5 mmol 2,6-di-tert-butyl-p-cresol were added sequentially to a reaction flask, stirred and mixed, heated to reflux, and reacted for 6 h. After cooling to room temperature, the mixture was rotary evaporated at 50 °C to constant weight. 200 ml dichloromethane was added and stirred for 30 min. The mixture was washed sequentially with 80 ml 2 wt% HCl solution and 80 ml saturated brine, dried over 20 g anhydrous magnesium sulfate, filtered, and the filtrate was rotary evaporated at 35 °C to constant weight to obtain intermediate 1. Its 1H NMR data are as follows: 1 H NMR (400 MHz, Chloroform-d) 11.72 (s, 1H),9.29 (s, 2H), 8.52 (s, 2H), 7.42 – 7.32 (m, 4H), 6.79 – 6.71 (m, 4H), 5.75(ttd, J = 11.2, 7.7, 1.7 Hz, 1H), 5.11 (ddd, J = 18.3, 11.3, 2.3 Hz, 2H), 3.50 (td, J = 7.8, 1.8 Hz, 1H), 2.99 (dt, J = 13.2, 5.9 Hz, 2H), 2.86 (dt, J= 13.2, 5.9 Hz, 2H), 2.63 – 2.46 (m, 4H), 2.37 (td, J = 7.8, 1.7 Hz, 2H); HRMS(m / z): 442.1908[M+H] + ; S2: 200 ml anhydrous chloroform and 0.205 mol lipoic acid were added to a reaction flask and stirred until homogeneous. 0.45 mol thionyl chloride was added dropwise over 30 min. The mixture was stirred at room temperature for 2 h, then heated to reflux for 5 h. After cooling to room temperature, the mixture was rotary evaporated at 50 °C to constant weight. The residue was dissolved in 200 ml dichloromethane to obtain an acyl chloride solution. 200 ml dichloromethane, 0.1 mol intermediate 1, and 0.2 mol triethylamine were added to a reaction flask and stirred until homogeneous. The mixture was cooled to 0 °C, and the acyl chloride solution was added dropwise over 1 h. The mixture was stirred for 1 h, then heated to reflux for 3 h. After cooling to room temperature, the mixture was filtered. The filtrate was washed with 100 ml 2 wt% HCl solution. The organic phase was rotary evaporated at 35 °C to constant weight. The phase was recrystallized with 180 ml acetone, filtered, and dried under vacuum at 50 °C for 12 h to obtain intermediate 2. Its 1H NMR data are as follows:1 H NMR(400 MHz, Chloroform-d) δ 11.71 (s, 1H), 9.29 (s, 2H), 7.39 – 7.29 (m, 4H), 7.22 – 7.13 (m, 4H), 5.76 (ttd, J = 16.8, 7.9, 1.8 Hz, 1H), 5.10 (ddd, J =18.1, 16.8, 2.3 Hz, 2H), 3.51 (td, J = 8.0, 1.9 Hz, 1H), 3.27 (tt, J = 4.4,3.6 Hz, 2H), 3.18 (dd, J = 4.6, 2.8 Hz, 2H), 3.07 (dd, J = 4.6, 2.8 Hz, 2H), 2.98 (dt, J = 13.3, 5.8 Hz, 2H), 2.87 (dt, J = 13.3, 6.0 Hz, 2H), 2.63 – 2.44(m, 8H), 2.38 (td, J = 7.9, 1.6 Hz, 2H), 2.20 HRMS (m / z):818.2554[M+H] + ; S3: Under nitrogen protection, 500 ml of anhydrous tetrahydrofuran, 0.1 mol of intermediate 2, 0.104 mol of γ-mercaptopropyltrimethoxysilane, and 2 g of photoinitiator TPO were added sequentially to a reaction flask, stirred and mixed thoroughly, and the mixture was incubated at room temperature with an intensity of 5 mW / cm². 2 The reaction was carried out under 365nm ultraviolet LED light irradiation for 30 min, followed by rotary evaporation at 45℃ to constant weight. 400ml of anhydrous diethyl ether was added and stirred to precipitate the mixture. The precipitate was filtered, and the filter cake was washed with anhydrous diethyl ether (2×50ml). The cake was then vacuum dried at 50℃ for 12 h to obtain the enhancing modifier. Its 1H NMR spectrum is shown below. Figure 1 As shown, the proton NMR data are as follows: 1H NMR (400 MHz, Chloroform-d) δ 11.59 (s, 1H), 9.28 (s,2H), 7.44 – 7.29 (m, 4H), 7.20 – 7.12 (m, 4H), 3.57 (s, 9H), 3.44 (t, J = 6.7Hz, 1H), 2.85 (dt, J =13.4, 6.1 Hz, 2H), 2.63 – 2.43 (m, 12H), 2.20 (ddd, J = 4.4, 3.4, 2.7 Hz, 2H), 1.90 (ddd, J = 4.6, 3.4, 2.6 Hz, 2H), 1.84 – 1.76 (m, 2H), 1.75 – 1.51 (m, 12H), 1.50 – 1.34 (m, 4H), 0.91 (td, J = 9.1, 1.6 Hz, 2H); High-resolution mass spectra are shown below. Figure 2 As shown, HRMS (m / z): 1014.3157 [M+H] + .

[0025] Example 2 Preparation of reinforcing modifier S1: 250 ml methanol, 0.206 mol N-p-hydroxyphenylacrylamide, 0.1 mol D-allylglycine, 0.2 mol triethylamine and 5 mmol 2,6-di-tert-butyl-p-cresol were added sequentially to a reaction flask, stirred and mixed, heated to reflux, reacted for 7 h, cooled to room temperature, and rotary evaporated at 50 °C to constant weight. 200 ml dichloromethane was added and stirred for 30 min. The mixture was washed sequentially with 80 ml 2 wt% HCl solution and 80 ml saturated brine, dried with 20 g anhydrous magnesium sulfate, filtered, and the filtrate was rotary evaporated at 35 °C to constant weight to obtain intermediate 1. S2: Add 200 ml of anhydrous chloroform and 0.208 mol of lipoic acid to a reaction flask, stir and mix well, add 0.45 mol of thionyl chloride dropwise, completing the addition in 30 min, stir at room temperature for 2 h, heat to reflux for 5 h, cool to room temperature, and rotary evaporate at 50 °C to constant weight. Dissolve the residue in 200 ml of dichloromethane to obtain an acyl chloride solution; add 200 ml of dichloromethane, 0.1 mol of intermediate 1, and 0.2 mol of triethylamine to a reaction flask, stir and mix well, cool to 0 °C, add the acyl chloride solution dropwise, completing the addition in 1 h, stir for 1 h, heat to reflux, react for 4 h, cool to room temperature, filter, wash the filtrate with 100 ml of 2 wt% HCl solution, rotary evaporate the organic phase at 30 °C to constant weight, recrystallize with 180 ml of acetone, filter, and vacuum dry at 50 °C for 12 h to obtain intermediate 2; S3: Under nitrogen protection, 500 ml of anhydrous tetrahydrofuran, 0.1 mol of intermediate 2, 0.105 mol of γ-mercaptopropyltrimethoxysilane, and 2 g of photoinitiator TPO were sequentially added to a reaction flask, stirred and mixed thoroughly, and the mixture was incubated at room temperature with an intensity of 5 mW / cm². 2 The reaction was carried out under 365nm ultraviolet LED light for 30 min, and then rotary evaporated at 45℃ to constant weight. 400 ml of anhydrous diethyl ether was added and stirred to precipitate the precipitate. The precipitate was filtered, and the filter cake was washed with anhydrous diethyl ether (2×50 ml). The cake was then vacuum dried at 50℃ for 12 h to obtain the reinforcing modifier.

[0026] Example 3 Preparation of reinforcing modifier S1: 250 ml methanol, 0.208 mol N-p-hydroxyphenylacrylamide, 0.1 mol D-allylglycine, 0.2 mol triethylamine and 5 mmol 2,6-di-tert-butyl-p-cresol were added sequentially to a reaction flask, stirred and mixed, heated to reflux, reacted for 8 h, cooled to room temperature, and rotary evaporated at 50 °C to constant weight. 200 ml dichloromethane was added and stirred for 30 min. The mixture was washed sequentially with 80 ml 2 wt% HCl solution and 80 ml saturated brine, dried with 20 g anhydrous magnesium sulfate, filtered, and the filtrate was rotary evaporated at 35 °C to constant weight to obtain intermediate 1. S2: Add 200 ml of anhydrous chloroform and 0.21 mol of thioctic acid to a reaction flask, stir and mix well, add 0.45 mol of thionyl chloride dropwise, completing the addition in 30 min, stir at room temperature for 2 h, heat to reflux and react for 5 h, cool to room temperature, and rotary evaporate at 50 °C to constant weight. Dissolve the residue in 200 ml of dichloromethane to obtain an acyl chloride solution; add 200 ml of dichloromethane, 0.1 mol of intermediate 1, and 0.2 mol of triethylamine to a reaction flask, stir and mix well, cool to 0 °C, add the acyl chloride solution dropwise, completing the addition in 1 h, stir for 1 h, heat to reflux and react for 5 h, cool to room temperature, filter, wash the filtrate with 100 ml of 1 wt% HCl solution, rotary evaporate the organic phase at 35 °C to constant weight, recrystallize with 180 ml of acetone, filter, and vacuum dry at 50 °C for 12 h to obtain intermediate 2; S3: Under nitrogen protection, 500 ml of anhydrous tetrahydrofuran, 0.1 mol of intermediate 2, 0.106 mol of γ-mercaptopropyltrimethoxysilane, and 2 g of photoinitiator TPO were sequentially added to a reaction flask, stirred and mixed thoroughly, and the mixture was incubated at room temperature with an intensity of 5 mW / cm². 2 The reaction was carried out under 365nm ultraviolet LED light for 30 min, and then rotary evaporated at 45℃ to constant weight. 400 ml of anhydrous diethyl ether was added and stirred to precipitate the precipitate. The precipitate was filtered, and the filter cake was washed with anhydrous diethyl ether (2×80 ml). The cake was then vacuum dried at 50℃ for 12 h to obtain the reinforcing modifier.

[0027] Example 4 Preparation of antistatic agent N1: Under nitrogen protection, 250 ml of acetonitrile, 0.1 mol of dodecyl dimethyl tertiary amine, 0.11 mol of potassium carbonate, and 0.105 mol of 2-(2-(2-(2-chloroethoxy)ethoxy)ethoxy)acetic acid were added to a reaction flask, stirred and mixed, heated to reflux, and reacted for 10 h. After cooling to room temperature, the mixture was filtered, and the pH of the filtrate was adjusted to 4 with 1 M HCl solution. The filtrate was rotary evaporated at 50 °C to constant weight, and the final weight was determined using a mixture of 200 ml of anhydrous ethanol and ethyl acetate (V... 无水乙醇 V 乙酸乙酯 Recrystallization (r=2:8) was performed, filtered, and dried under vacuum at 50°C for 12 h to obtain the quaternary ammonium salt compound; its 1H NMR data are as follows: 1H NMR (400 MHz, Chloroform-d) δ10.77 (s, 1H), 4.06 (s, 2H), 3.81 (dd, J = 5.2, 4.5 Hz, 2H), 3.71 – 3.57 (m,10H), 3.40 (t, J = 8.6 Hz, 2H), 3.18 (s, 6H), 1.76 (tt, J = 8.6, 6.3 Hz, 2H), 1.45 – 1.22 (m, 18H), 0.93 – 0.85 (m, 3H); HRMS (m / z): 404.3376[M-Cl] + ; Under nitrogen protection, 800 ml of DMF, 0.1 mol of N,N,N',N'-tetracyclooxypropyl-4,4'-diaminodiphenylmethane, 0.41 mol of quaternary ammonium salt compound, and 0.04 mol of tetrabutylammonium bromide were sequentially added to a reaction flask, stirred and mixed, heated to 120 °C, and reacted for 8 h. After cooling to room temperature, the mixture was rotary evaporated at 80 °C to constant weight. 600 ml of acetone was added and stirred to precipitate the precipitate. The precipitate was filtered, washed with 50 wt% acetone aqueous solution (3 × 50 ml), and dried under vacuum at 60 °C for 12 h to obtain the antistatic agent. Its proton NMR spectrum is shown below. Figure 3 As shown, the proton NMR data are as follows: 1 H NMR (400 MHz, DMSO-d6) δ 7.05 – 6.96 (m, 4H), 6.70 –6.63 (m, 4H), 4.95 (d, J = 6.4 Hz, 4H), 4.22 – 4.11 (m, 16H), 4.06 – 3.96 (m,4H), 3.93 (p, J = 0.9 Hz, 2H), 3.79 (t, J = 4.9 Hz, 8H), 3.71 – 3.63 (m,16H), 3.62 – 3.53 (m, 24H), 3.49 (dd, J = 12.3, 6.0 Hz, 4H), 3.39 (t, J = 8.5Hz, 8H), 3.33 (dd, J = 12.4, 6.0 Hz, 4H), 3.17 (s, 24H), 1.74 (ttd, J = 8.7, 6.2, 2.6 Hz, 8H), 1.43 – 1.26 (m, 72H), 0.95 – 0.84 (m, 12H); High-resolution mass spectra are shown below. Figure 4 As shown, HRMS (m / z): 510.1437 [M-4Cl] 4+ .

[0028] Example 5 Preparation of high sound insulation and sound absorption coating (1) Weigh out: 250g acrylic emulsion, 130g polyurethane emulsion, 50g polysiloxane, 8g dispersant (4g sodium hexametaphosphate, 4g sodium polycarboxylate), 10g antistatic agent (prepared in Example 4), 50g curing agent (Bayhydur XP 2655), 2g curing accelerator (zinc octoate), 250g deionized water, 50g reinforcing modifier (prepared in Example 1), 50g silica aerogel, 100g sound insulation filler (60g mica powder, 20g glass microspheres, 20g hollow ceramic microspheres), and 20g thickener (hydroxyethyl cellulose); (2) Mix deionized water and reinforcing modifier, stir at 100 rpm for 10 min, adjust pH to 4 with 1M HCl solution, add silica aerogel and sound insulation filler in sequence, stir at 200 rpm for 2 h at room temperature, add thickener, stir at 500 rpm for 30 min to obtain slurry; add acrylic emulsion, polyurethane emulsion, polysiloxane, dispersant and antistatic agent in sequence to high-speed disperser, disperse at 1500 rpm for 60 min, add slurry and continue to disperse for 30 min to obtain component A; stir curing agent and curing accelerator at 500 rpm for 15 min to obtain component B; when using, add component B to component A and stir at 500 rpm for 15 min to obtain high sound insulation sound absorption coating.

[0029] Example 6 Preparation of high sound insulation and sound absorption coating (1) Weigh out: 260g of acrylic emulsion, 140g of polyurethane emulsion, 60g of polysiloxane, 10g of dispersant (5g of sodium hexametaphosphate, 5g of sodium polycarboxylate), 20g of antistatic agent (prepared in Example 4), 60g of curing agent (Bayhydur XP 2655), 2.5g of curing accelerator (zinc octoate), 280g of deionized water, 70g of reinforcing modifier (prepared in Example 2), 70g of silica aerogel, 120g of sound insulation filler (72g of mica powder, 24g of glass microspheres, 24g of hollow ceramic microspheres), and 40g of thickener (hydroxyethyl cellulose); (2) Mix deionized water and reinforcing modifier, stir at 100 rpm for 10 min, adjust pH to 4 with 1M HCl solution, add silica aerogel and sound insulation filler in sequence, stir at 200 rpm for 2 h at room temperature, add thickener, stir at 500 rpm for 30 min to obtain slurry; add acrylic emulsion, polyurethane emulsion, polysiloxane, dispersant and antistatic agent in sequence to high-speed disperser, disperse at 1500 rpm for 60 min, add slurry and continue to disperse for 30 min to obtain component A; stir curing agent and curing accelerator at 500 rpm for 15 min to obtain component B; when using, add component B to component A and stir at 500 rpm for 15 min to obtain high sound insulation sound absorption coating.

[0030] Example 7 Preparation of high sound insulation and sound absorption coating (1) Weigh out: 280g acrylic emulsion, 150g polyurethane emulsion, 80g polysiloxane, 12g dispersant (6g sodium hexametaphosphate, 6g sodium polycarboxylate), 30g antistatic agent (prepared in Example 4), 80g curing agent (Bayhydur XP 2655), 3g curing accelerator (zinc octoate), 300g deionized water, 80g reinforcing modifier (prepared in Example 3), 80g silica aerogel, 150g sound insulation filler (90g mica powder, 30g glass microspheres, 30g hollow ceramic microspheres), and 50g thickener (hydroxyethyl cellulose); (2) Mix deionized water and reinforcing modifier, stir at 100 rpm for 10 min, adjust pH to 4 with 1M HCl solution, add silica aerogel and sound insulation filler in sequence, stir at 200 rpm for 2 h at room temperature, add thickener, stir at 500 rpm for 30 min to obtain slurry; add acrylic emulsion, polyurethane emulsion, polysiloxane, dispersant and antistatic agent in sequence to high-speed disperser, disperse at 1500 rpm for 60 min, add slurry and continue to disperse for 30 min to obtain component A; stir curing agent and curing accelerator at 500 rpm for 15 min to obtain component B; when using, add component B to component A and stir at 500 rpm for 15 min to obtain high sound insulation sound absorption coating.

[0031] Comparative Example 1 The raw material composition and preparation method of the high sound insulation and sound-absorbing coating are basically the same as those in Example 6, except that the reinforcing modifier is replaced with an equal weight of the reinforcing modifier prepared by the following method: The preparation method of the reinforcing modifier is basically the same as that in Example 2, except that N-p-hydroxyphenylacrylamide in step S1 is replaced with an equimolar amount of 3-butene-1-amine.

[0032] Comparative Example 2 The raw material composition and preparation method of the high sound insulation and sound-absorbing coating are basically the same as those in Example 6, except that the reinforcing modifier is replaced with an equal weight of the reinforcing modifier prepared by the following method: The preparation method of the reinforcing modifier is basically the same as that in Example 2, except that N-p-hydroxyphenylacrylamide in step S1 is replaced with an equimolar amount of 3-acryloyldopamine, and lipoic acid in step S2 is replaced with 0.41 mol.

[0033] Comparative Example 3 The raw material composition and preparation method of the high sound insulation and sound-absorbing coating are basically the same as those in Example 6, except that the reinforcing modifier is replaced with an equal weight of the reinforcing modifier prepared by the following method: The preparation method of the reinforcing modifier is basically the same as that in Example 2, except that the lipoic acid in step S2 is replaced with an equimolar amount of 4-(methyl disulfide)butyric acid.

[0034] Comparative Example 4 The raw material composition and preparation method of the high sound insulation and sound-absorbing coating are basically the same as those in Example 6, except that the reinforcing modifier is replaced with an equal weight of the reinforcing modifier prepared by the following method: The preparation method of the reinforcing modifier is basically the same as that in Example 2, except that γ-mercaptopropyltrimethoxysilane in step S3 is replaced with an equimolar amount of mercaptopropylmethyldimethoxysilane.

[0035] Comparative Example 5 The raw material composition and preparation method of the high sound insulation and sound-absorbing coating are basically the same as those in Example 6, except that the antistatic agent is replaced with an equal weight of antistatic agent prepared by the following method: The preparation method of the antistatic agent is basically the same as that in Example 4, except that 2-(2-(2-(2-chloroethoxy)ethoxy)ethoxy)acetic acid in step N1 is replaced with an equimolar amount of 11-chloroundecanoic acid.

[0036] Comparative Example 6 The raw material composition and preparation method of the high sound insulation and sound-absorbing coating are basically the same as those in Example 6, except that the antistatic agent is replaced with an equal weight of antistatic agent prepared by the following method: The preparation method of the antistatic agent is basically the same as that in Example 4, except that the 2-(2-(2-(2-chloroethoxy)ethoxy)ethoxy)acetic acid in step N1 is replaced with an equimolar amount of 2-(2-chloroethoxy)acetic acid.

[0037] Comparative Example 7 The raw material composition and preparation method of the high sound insulation and sound-absorbing coating are basically the same as those in Example 6, except that the antistatic agent is replaced with an equal weight of antistatic agent prepared by the following method: The preparation method of the antistatic agent is basically the same as that in Example 4, except that N,N,N',N'-tetracyclooxypropyl-4,4'-diaminodiphenylmethane in step N2 is replaced with 0.2 mol of N,N-bis(glycidyl)aniline.

[0038] Comparative Example 8 The raw material composition and preparation method of the high sound insulation and sound-absorbing coating are basically the same as those in Example 6, except that the antistatic agent is replaced with an equal weight of antistatic agent prepared by the following method: The preparation method of the antistatic agent is basically the same as that in Example 4, except that N,N,N',N'-tetracyclooxypropyl-4,4'-diaminodiphenylmethane in step N2 is replaced with an equimolar amount of N,N,N',N'-tetra(epoxyethylenemethyl)-1,4-phenylenediamine (CAS: 28469-72-9).

[0039] The acrylic emulsion used in this application is model S-05 pure acrylic emulsion with a solid content of 48wt%, produced by Jiangsu Shengda New Material Technology Co., Ltd.; the polyurethane emulsion is model HA-2750H with a solid content of 35wt%, produced by Shanghai Hecheng Polymer Technology Co., Ltd.; the polysiloxane is model IOTA 201-10, produced by Anhui Aiyota Silicon Oil Co., Ltd.; the silica aerogel is model Fusil® ARG150, produced by Dalian Fuchang Chemical Co., Ltd.; the mica powder is model ZR-A4, produced by Guangdong Yongfeng Chemical Co., Ltd.; the glass microspheres are model hollow glass microspheres H60, produced by Zhongke Yali Technology Co., Ltd.; the hollow ceramic microspheres have a particle size uniformly distributed between 10-400μm, produced by Shanghai Huijingya Nanomaterials Co., Ltd.; the sodium polycarboxylate is model SN-5040; and the hydroxyethyl cellulose is model HECOCELL®HE150, produced by Henan Hengkai Chemical Co., Ltd.

[0040] The high sound insulation and sound-absorbing coatings prepared in the examples and comparative examples were tested for wear resistance, antistatic properties and sound insulation properties. The test results are shown in Table 1.

[0041] Abrasion resistance test: The high sound insulation and sound absorption coating was evenly applied to the surface of a tinplate (φ100mm×5mm) with a surface roughness of 0.8μm after sanding using a wire bar coater. The coating thickness was 1mm. After coating, the tinplate was placed in an environment with room temperature and relative humidity of 50% for 48 hours for curing. The test was conducted according to GB / T 1768-2006, with test conditions of 750g / 500r and a CS-17 rubber grinding wheel.

[0042] Antistatic performance test: The high sound insulation and sound absorption coating was uniformly applied to the surface of an asbestos-free fiber cement flat plate (100mm×100mm×5mm) using a wire bar coater. The coating thickness was 1mm. After the coating was applied, the plate was placed in an environment with room temperature and relative humidity of 50% for 48 hours for curing. According to GB / T 31838.3-2019, the surface resistivity of the sample was measured using electrode device A in a specific environment (temperature of 23℃ and relative humidity of 50%), and the test voltage was set to 500V.

[0043] Sound insulation performance test: The high sound insulation and sound-absorbing coating was evenly applied to the surface of a reinforced concrete floor slab (1000mm×1000mm×140mm) using a wire bar applicator. The coating thickness was 3mm. After the coating was applied, it was placed in an environment with room temperature and relative humidity of 50% for 48 hours for curing. The improvement in impact sound pressure level was tested according to GB / T 19889.8-2006 standard.

[0044] Table 1 Performance Test Data

[0045] As can be seen from the data in Table 1, the high sound insulation and sound absorption coating prepared by the present invention has excellent wear resistance, antistatic properties and sound insulation properties.

[0046] The high sound insulation and sound-absorbing coating prepared in this invention incorporates a reinforcing modifier containing carboxyl groups, methoxysilane, and a rigid benzene ring structure, linked by flexible alkyl chains to form cyclic disulfide bonds. The methoxysilane hydrolyzes under acidic conditions to form a silanol structure, which then undergoes a condensation reaction with the hydroxyl groups on the surface of inorganic fillers (such as mica powder and silica aerogel) in the coating, forming stable Si-O-Si covalent bonds. This creates a stable interfacial bonding layer between the filler and the coating resin (such as polyurethane), effectively improving the dispersion stability of the filler in the system and reducing interfacial defects, thus enhancing the wear resistance of the coating. The carboxyl groups not only form hydrogen bonds with polar groups (such as ester groups) in the coating system but also form weak coordination with metal ions on the filler surface, synergistically improving the interfacial compatibility between the inorganic filler and the resin, resulting in a more uniform and stable dispersion structure of the inorganic filler in the coating. The rigid structure of the benzene ring can improve the overall modulus and structural stability of the coating, further enhancing its friction resistance. The flexible alkyl chain undergoes molecular chain conformation rearrangement and extension deformation under external stress, dissipating energy and dispersing local high stress concentrations, effectively protecting the coating. The cyclic disulfide bond can undergo dynamic fracture and recombination under stress, which can alleviate stress concentration, thereby improving the coating's fatigue resistance and wear resistance.

[0047] The reinforcing modifier used in Comparative Example 2 contains four cyclic disulfide bonds. The large number of dynamic bonds reduces the overall network stiffness and modulus, giving the chain segments excessively high degrees of freedom of movement. This leads to significant chain slippage, plastic deformation, and shear band formation at the friction interface, making the surface prone to abrasive grains, ploughing, and material spalling. The reinforcing modifier used in Comparative Example 3 has linear disulfide bonds, exhibiting high molecular flexibility but lacking the stress-regulating ability provided by cyclic structures. It struggles to form stable mechanical reinforcement nodes. Therefore, under frictional stress, chain slippage and structural damage are more likely to occur within the coating, reducing the coating surface's wear resistance.

[0048] The antistatic agent added to the high sound insulation and sound-absorbing coating prepared in this invention is based on tertiary amine diphenylmethane, and incorporates hydroxyl groups, polyether segments, quaternary ammonium salts, and long-chain alkyl groups. The quaternary ammonium salt groups carry a strong polar positive charge and possess excellent ionic conductivity, effectively adsorbing and neutralizing static charges generated on the material surface. The diphenylmethane and paired tertiary amine groups synergistically expand the local conjugated structure of π electrons, jointly enhancing charge transport capability and achieving electron hopping conduction, thus reducing resistivity. The polyether segments and hydroxyl groups can bind with trace amounts of moisture in the air through hydrogen bonds, forming an extremely thin conductive water film on the coating surface, thereby constructing continuous conductive channels and allowing static charges to leak and dissipate rapidly. The long-chain alkyl groups can entangle and blend with the polymer segments through van der Waals forces and hydrophobic interactions, preventing the antistatic agent from being lost during long-term use and ensuring the durability of the antistatic effect.

[0049] The antistatic agent used in Comparative Example 5 lacks polyether segments, resulting in fewer conductive paths formed by the antistatic agent in the coating and reduced charge migration efficiency. Simultaneously, the long-chain alkyl structure more easily forms hydrophobic aggregation regions in the organic matrix, leading to uneven distribution of polar quaternary ammonium salt groups and weakening the ability to form a surface polar conductive layer, thus reducing antistatic performance. The antistatic agent used in Comparative Example 8 has a tertiary amine benzene ring as its core, resulting in a smaller π-electron local conjugated structure. Furthermore, its molecular skeleton is relatively flat and its spatial structure is smaller, leading to uneven distribution of polar groups, thus its antistatic performance is relatively poor.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. However, any modifications, alterations, and variations made by those skilled in the art without departing from the scope of the present invention based on the disclosed technical content are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A high sound insulation and sound-absorbing coating, characterized in that, The raw materials include the following parts by weight: 25-28 parts acrylic emulsion, 13-15 parts polyurethane emulsion, 5-8 parts polysiloxane, 0.8-1.2 parts dispersant, 1-3 parts antistatic agent, 5-8 parts curing agent, 0.2-0.3 parts curing accelerator, 25-30 parts deionized water, 5-8 parts reinforcing modifier, 5-8 parts silica aerogel, 10-15 parts sound insulation filler, and 2-5 parts thickener; The structural formula of the reinforcing modifier is as follows: ； The antistatic agent has the following structural formula: 。 2. The high sound insulation and sound absorption coating according to claim 1, characterized in that, The reinforcing modifier is prepared by the following method: S1: N-p-hydroxyphenylacrylamide reacts with D-allylglycine to generate intermediate 1. S2: Intermediate 1 reacts with lipoic acid to form intermediate 2. S3: Intermediate 2 reacts with γ-mercaptopropyltrimethoxysilane to generate a reinforcing modifier.

3. The high sound insulation and sound absorption coating according to claim 2, characterized in that, In step S1, the molar ratio of N-p-hydroxyphenylacrylamide to D-allylglycine is (2.05-2.08):

1.

4. The high sound insulation and sound absorption coating according to claim 2, characterized in that, In step S2, the molar ratio of intermediate 1 to thioctic acid is 1:(2.05-2.1).

5. The high sound insulation and sound absorption coating according to claim 2, characterized in that, In step S3, the molar ratio of intermediate 2 to γ-mercaptopropyltrimethoxysilane is 1:(1.04-1.06).

6. The high sound insulation and sound absorption coating according to claim 1, characterized in that, The antistatic agent is prepared by the following method: N1: The reaction of dodecyl dimethyl tertiary amine with 2-(2-(2-(2-chloroethoxy)ethoxy)ethoxy)acetic acid yields a quaternary ammonium salt compound. N2: The reaction of quaternary ammonium salt compounds with N,N,N',N'-tetracyclooxypropyl-4,4'-diaminodiphenylmethane yields an antistatic agent.

7. The high sound insulation and sound absorption coating according to claim 6, characterized in that, In step N1, the molar ratio of the dodecyl dimethyl tertiary amine to 2-(2-(2-(2-chloroethoxy)ethoxy)ethoxy)acetic acid is 1:1.05; in step N2, the molar ratio of the quaternary ammonium salt compound to N,N,N',N'-tetracyclooxypropyl-4,4'-diaminodiphenylmethane is 4.1:

1.

8. The high sound insulation and sound absorption coating according to claim 1, characterized in that, The sound-insulating filler is a mixture of mica powder, glass microspheres and hollow ceramic microspheres in a mass ratio of 3:1:1; the thickener is hydroxyethyl cellulose.

9. The high sound insulation and sound absorption coating according to claim 1, characterized in that, The dispersant is a mixture of sodium hexametaphosphate and sodium polycarboxylate in a mass ratio of 1:1; the curing agent is the waterborne polyurethane curing agent Bayhydur XP2655; and the curing accelerator is zinc octanoate.

10. A method for preparing a high sound insulation and sound-absorbing coating according to any one of claims 1-9, characterized in that, Includes the following steps: (1) Weigh out the following by weight: 25-28 parts acrylic emulsion, 13-15 parts polyurethane emulsion, 5-8 parts polysiloxane, 0.8-1.2 parts dispersant, 1-3 parts antistatic agent, 5-8 parts curing agent, 0.2-0.3 parts curing accelerator, 25-30 parts deionized water, 5-8 parts reinforcing modifier, 5-8 parts silica aerogel, 10-15 parts sound insulation filler, and 2-5 parts thickener; (2) Stir and mix deionized water and reinforcing modifier, add silica aerogel and sound insulation filler and stir, add thickener and stir and mix to obtain slurry; stir and mix acrylic emulsion, polyurethane emulsion, polysiloxane, dispersant and antistatic agent, add to slurry and disperse at high speed to obtain component A; stir and mix curing agent and curing accelerator to obtain component B; add component B to component A and stir and mix to obtain high sound insulation sound absorption coating.

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