Sound insulation coating and preparation method thereof

Abstract

The invention relates to the field of building coatings, in particular to a sound insulation coating and a preparation method thereof. The sound insulation coating is prepared from the following raw material components in parts by weight: 40 to 50 parts of deionized water, 15 to 20 parts of sound insulation emulsion, 0.5 to 0.6 part of dispersing agent, 0.1 to 0.2 part of wetting agent, 10 to 18 parts of sepiolite fiber, 1 to 1.5 parts of wood fiber, 10 to 15 parts of fine cotton, 1 to 1.5 parts of mica sheet, 10 to 15 parts of ceramsite, 0.2 to 0.3 part of preservative, 0.2 to 0.5 part of coalescing agent, 0.5 to 1 part of ethylene glycol and 0.05 to 0.1 part of thickening agent. Medium-high frequency sound energy is converted through the organic damping network, full-frequency sound waves are dissipated through reflection and friction of the fiber skeleton, low-frequency sound energy is absorbed through resonance of the porous ceramsite and propagation is blocked, sound wave scattering is enhanced through the fine cotton and the mica, multi-stage synergistic sound insulation is achieved, the sound insulation material is applied to building interior walls, and the highest average sound insulation index can reach 28 dB.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of architectural coatings, in particular to a sound insulation coating and a preparation method thereof. BACKGROUND

[0002] Giving the substrate color, texture, luster and texture, improving its visual beauty and value, is the embodiment of the traditional decorative function of paint; at the same time, by forming a protective barrier to resist light, oxygen, moisture, chemical corrosion and solvent action, to prolong the service life of the substrate, which is the fundamental of its protection function. However, the current urbanization process is rapid and the pace of life is accelerating, making noise pollution such as traffic, industrial and living noise increasingly becoming a serious problem that damages the quality of life and health. The ubiquitous noise sources make people's demand for the tranquility of living, working and leisure space become increasingly urgent. People hope to build an efficient sound insulation layer on the surface of the object through a convenient coating process, which can significantly block external noise or internal noise from leaking, so as to create a quiet, comfortable and private acoustic space. The development of coatings with excellent decorative effect and high-efficiency sound insulation performance is becoming a key direction of coating technology development. Under this background, the traditional coatings with only decorative and basic protective performance can no longer meet the market's core expectations for high-quality environment. Therefore, the demand for developing a new type of functional coating has emerged: it must inherit the dual attributes of traditional coatings of decoration and protection, and at the same time, it must have excellent sound insulation and noise reduction capability. SUMMARY

[0003] To solve the above technical problems, the present application provides a sound insulation coating and a production method, which has good sound insulation performance, improves the sound environment, is non-toxic and harmless, and has no adverse effects on the human body and the environment.

[0004] The object of the present application is achieved by the following technical solutions: Firstly, the present application provides a sound insulation coating, which comprises the following raw material components in parts by weight: deionized water 40-50 parts, sound insulation emulsion 15-20 parts, dispersing agent 0.5-0.6 parts, wetting agent 0.1-0.2 parts, sepiolite fiber 10-18 parts, wood fiber 1-1.5 parts, 10-15 parts of fine cotton, mica sheet 1-1.5 parts, ceramsite 10-15 parts, preservative 0.2-0.3 parts, film-forming aid 0.2-0.5 parts, ethylene glycol 0.5-1 parts and thickening agent 0.05-0.1 parts.

[0005] Further, the sound insulation emulsion is a styrene-acrylate copolymer emulsion, and the glass transition temperature of the styrene-acrylate copolymer emulsion is -16℃ to 1℃.

[0006] Further, the sepiolite fiber has a needle-like structure, and the aspect ratio is ≥20:1.

[0007] Further, the wood fiber is a needle-leaf wood pulp fiber powder with a particle size of 60-100 mesh.

[0008] Further, the ceramic particles are obtained by grinding porous ceramics prepared by gel casting-foaming, and the particle size of the ceramic particles is 0-2 mm. The method for preparing the porous ceramics by gel casting-foaming can refer to the specific operation steps disclosed in Example 1 of patent ZL202010838879.2.

[0009] Further, the fine cotton is an aluminum silicate fiber.

[0010] Further, the mica sheet is a natural mica with a particle size of 20-40 mesh.

[0011] Further, the wetting agent is a long-chain alcohol polyoxyethylene ether (APEO-free); the defoaming agent is a mineral oil-based defoaming polymer; and the dispersing agent is an ammonia salt dispersing agent.

[0012] Further, the thickening agent is hydroxyethyl cellulose; and the preservative is a compound of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one.

[0013] Further, the raw materials of the sound insulation coating further include an amine pH adjuster.

[0014] Secondly, the application further provides a preparation method of the sound insulation coating, which comprises the following steps: Deionized water is placed in a reaction kettle, and a dispersing agent and a wetting agent are sequentially added under a stirring speed of 200-300 r / min, and stirring is performed for 10 min; Then, the stirring speed is adjusted to 600-700 r / min, and sepiolite fiber, wood fiber, fine cotton, and mica sheet are sequentially and slowly added, and stirring is continuously performed for 15 min; Then, the stirring speed is adjusted to 400-600 r / min, and ceramic particles, sound insulation emulsion, film-forming aid, ethylene glycol, and kason type preservative are sequentially added, and stirring is continuously performed for 10 min to form a homogeneous mixture; Finally, the stirring speed is adjusted to 500-600 r / min, and an amine pH adjuster and a thickening agent are added, and stirring is continuously performed for 5-8 min, and filtration is performed to obtain the sound insulation coating.

[0015] The application has the following beneficial effects: (1) The application converts medium and high frequency sound energy through an organic damping network, the fiber skeleton reflects and rubs to dissipate full frequency sound waves, the porous ceramic resonates to absorb low frequency sound energy and block propagation, the fine cotton and mica enhance sound wave scattering, and multi-level cooperative sound insulation is achieved; (2) The coating of the application is applied to an interior wall or heavy floor of a building, and the average sound insulation amount can reach up to 28 dB; (3) Meanwhile, the coating has certain heat insulation performance and environmental protection, and is widely suitable for conference rooms, hospitals, residential buildings, auditoriums and theaters and the like scenes. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Sound insulation performance chart of examples and comparative examples; Figure 2 Heat conductivity performance chart of examples and comparative examples. DETAILED DESCRIPTION

[0017] In order to further understand the present application, the preferred embodiments of the present application are described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present application, and are not limitations on the claims of the present application.

[0018] The reagents or instruments used in the present application are not marked with the manufacturer, and are all conventional products that can be purchased on the market.

[0019] Example 1 (1) 50 parts of deionized water were placed in a reaction kettle, and 0.6 parts of an ammonia salt dispersing agent, 0.12 parts of a long-chain alcohol polyoxyethylene ether (APEO-free) surfactant and 0.08 parts of a mineral oil-based antifoam polymer were sequentially added under a stirring speed of 200 r / min, and stirred for 10 min; (2) The speed was adjusted to 600 r / min, and 10 parts of needle-shaped sepiolite fiber (aspect ratio ≥ 20:1), 1.3 parts of needle-leaf pulp fiber (particle size 80 mesh), 10.5 parts of aluminum silicate fiber and 1 part of natural mica flake (particle size 30 mesh) were slowly added in sequence, and continuously stirred for 15 min to ensure uniform dispersion without clumping; (3) To avoid high-speed damage to the structure of the ceramsite, the speed was adjusted to 400 r / min, 10 parts of ceramsite (the ceramic was prepared by the preparation method disclosed in Example 1 of patent ZL202010838879.2, and then ground, and the particle size of the ceramsite was ≤0.3 mm) was added, and then 15 parts of a styrene-acrylate copolymer emulsion, 0.25 parts of dodecanol ester, 0.7 parts of ethylene glycol, 0.25 parts of a compound of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one (mass ratio 2:1) were added, and stirred for 10 min to form a homogeneous mixture; (4) The speed was adjusted to 600 r / min, 0.1 parts of 2-amino-2-methyl-1-propanol and 0.1 parts of hydroxyethyl cellulose were added, and stirred for 7 min, and then filtered to obtain a sound insulation coating; (5) The sound insulation coating prepared was dried at room temperature and made into a 3 mm thick coating layer, and the average sound insulation amount at a frequency of 500-6500 Hz was 28.138 dB, and the heat conductivity was 0.235 W / m·K.

[0020] Example 2 (1) 50 parts of deionized water was placed in a reaction kettle, under the stirring rate of 250 r / min, 0.6 parts of ammonia salt dispersant, 0.12 parts of long-chain alcohol polyoxyethylene ether (APEO-free) surfactant and 0.08 parts of mineral oil-based antifoam polymer were added in turn, and stirred for 10 min; (2) The speed was adjusted to 600 r / min, 10 parts of needle-shaped sepiolite fiber (aspect ratio ≥ 20:1), 1.3 parts of coniferous wood pulp fiber (particle size 60 mesh), 10.5 parts of aluminum silicate fiber and 1 part of natural mica flake (particle size 40 mesh) were slowly added in turn, and stirred for 15 min to ensure uniform dispersion without clumping; (3) The speed was adjusted to 400 r / min, 10 parts of ceramic particles (ceramic particles with a particle size of 0.3-0.6 mm, obtained by the same method as in Example 1) were added, followed by the addition of 15 parts of styrene-acrylic acid copolymer emulsion, 0.25 parts of dodecanol ester, 0.7 parts of ethylene glycol, 0.25 parts of a compound of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one (mass ratio 2:1), and stirred for 10 min to form a homogeneous mixture; (4) The speed was adjusted to 550 r / min, 0.1 parts of 2-amino-2-methyl-1-propanol and 0.1 parts of hydroxyethyl cellulose were added, and stirred for 8 min, then filtered to obtain a sound insulation coating; (5) The sound insulation coating prepared was dried at room temperature and made into a 3 mm thick coating, and the average sound insulation value at a frequency of 500-6500 Hz was 25.338 dB, and the thermal conductivity was 0.238 W / m·K.

[0021] Example 3 (1) 50 parts of deionized water was placed in a reaction kettle, under the stirring rate of 300 r / min, 0.6 parts of ammonia salt dispersant, 0.12 parts of long-chain alcohol polyoxyethylene ether (APEO-free) surfactant and 0.08 parts of mineral oil-based antifoam polymer were added in turn, and stirred for 10 min; (2) The speed was adjusted to 650 r / min, 10 parts of needle-shaped sepiolite fiber (aspect ratio ≥ 20:1), 1.3 parts of coniferous wood pulp fiber (particle size 100 mesh), 10.5 parts of aluminum silicate fiber and 1 part of natural mica flake (particle size 20 mesh) were slowly added in turn, and stirred for 15 min to ensure uniform dispersion without clumping; (3) The rotation speed was adjusted to 400 r / min, 10 parts of ceramic particles (the particle size of the ceramic particles was 0.6-0.9 mm, and the preparation method was the same as that in Example 1) were added, and then 15 parts of a styrene-acrylic acid copolymer emulsion, 0.25 parts of dodecanol ester, 0.7 parts of ethylene glycol, and 0.25 parts of a compound of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one (mass ratio of 2:1) were added, and stirred for 10 min to form a homogeneous mixture; (4) The rotation speed was adjusted to 500 r / min, 0.1 part of 2-amino-2-methyl-1-propanol and 0.1 part of hydroxyethyl cellulose were added, stirred for 7 min, and filtered to obtain a sound insulation coating; (5) The prepared sound insulation coating was dried at room temperature and made into a 3 mm thick coating layer, and the average sound insulation amount at a frequency of 500-6500 Hz was 21.363 dB, and the thermal conductivity was 0.221 W / m·K.

[0022] Example 4 (1) 50 parts of deionized water were placed in a reaction kettle, and 0.6 parts of an ammonia salt dispersant, 0.12 parts of a long-chain alcohol polyoxyethylene ether (APEO-free) surfactant, and 0.08 parts of a mineral oil-based defoaming polymer were added in sequence under a stirring speed of 200 r / min, and stirred for 10 min; (2) The rotation speed was adjusted to 700 r / min, and 10 parts of needle-shaped sepiolite fibers (aspect ratio ≥ 20:1), 1.3 parts of needle leaf pulp fibers (particle size 80 mesh), 10.5 parts of aluminum silicate fibers, and 1 part of natural mica flakes (particle size 30 mesh) were slowly added in sequence, and continuously stirred for 15 min to ensure uniform dispersion without clumping; (3) The rotation speed was adjusted to 500 r / min, 10 parts of ceramic particles (the particle size of the ceramic particles was 0.9-2 mm, and the preparation method was the same as that in Example 1) were added, and then 15 parts of a styrene-acrylic acid copolymer emulsion, 0.25 parts of dodecanol ester, 0.7 parts of ethylene glycol, and 0.25 parts of a compound of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one (mass ratio of 2:1) were added, and stirred for 10 min to form a homogeneous mixture; (4) The rotation speed was adjusted to 500 r / min, 0.1 part of 2-amino-2-methyl-1-propanol and 0.1 part of hydroxyethyl cellulose were added, stirred for 5 min, and filtered to obtain a sound insulation coating; (5) The prepared sound insulation coating was dried at room temperature and made into a 3 mm thick coating layer, and the average sound insulation amount at a frequency of 500-6500 Hz was 23.403 dB, and the thermal conductivity was 0.272 W / m·K.

[0023] Comparative Example (1) Put 40 parts of deionized water into a reaction kettle, under the stirring speed of 200 r / min, add 0.6 parts of ammonia salt dispersant, 0.2 parts of long-chain alcohol polyoxyethylene ether (APEO-free) surfactant and 0.1 parts of mineral oil-based antifoam polymer in turn, and stir for 10 min; (2) Adjust the speed to 600 r / min, slowly add 18 parts of needle-shaped sepiolite fiber (aspect ratio ≥ 20:1), 1.5 parts of coniferous pulp fiber (particle size 80 mesh), 10.5 parts of aluminum silicate fiber and 1.5 parts of natural mica flake (particle size 30 mesh) in turn, and continue to stir for 15 min to ensure uniform dispersion without clumping; (3) Adjust the speed to 500 r / min, add 20 parts of styrene-acrylic acid copolymer emulsion, 0.5 parts of dodecanol ester, 1 part of ethylene glycol, 0.3 parts of a compound of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one (mass ratio 2:1), and stir for 10 min to form a homogeneous mixture; (4) Adjust the speed to 500 r / min, add 0.2 parts of 2-amino-2-methyl-1-propanol and 0.1 parts of hydroxyethyl cellulose, stir for 8 min, filter, and obtain the sound insulation coating; (5) Dry the prepared sound insulation coating at room temperature and make a 3 mm thick coating, the average sound insulation amount under the frequency of 500-6500 Hz is 13.083 dB, and the thermal conductivity is 0.325 W / m·K.

[0024] It should be noted that the parts of raw materials in the preparation processes of Examples 1-4 and Comparative Example 1 refer to mass parts.

[0025] Performance test The sound insulation coatings of Examples 1-4 and Comparative Example were tested for performance, and the test items were as follows: the impedance tube system SW4201 produced by Beijing Sound Prosound Technology Co., Ltd. was used to measure the sound insulation performance of the sound insulation coating. The thermal conductivity tester produced by the Swedish HotDisk Company was used to test the thermal conductivity performance of the prepared sound insulation coating. The test results are shown in Table 1.

[0026] Table 1

[0027] According to the test data of Examples 1-4 and Comparative Example given in Table 1, it can be seen that the sound insulation coating realizes excellent sound insulation effect through the multi-stage energy dissipation system and the synergistic mechanism of structure.

[0028] The sound insulation coating core lies in that the sound insulation emulsion (silicone / epoxy system) forms a damping network with the modified component, the long-chain molecules overcome internal friction through stretching-retraction movement, and convert medium-high frequency sound energy into heat energy; the sepiolite fiber and wood fiber construct a three-dimensional skeleton, dissipate full-band energy through sound wave reflection and friction between fibers; the key is the added ceramsite, which has an internal rich closed pore and open pore interlaced system, on the one hand, through resonance effect, it efficiently absorbs low-frequency sound energy, on the other hand, by virtue of the rigid porous skeleton, it blocks the sound wave propagation path, forces the sound wave to repeatedly refract and attenuate among the pores; at the same time, the fine cotton fiber penetrates into the ceramsite pores to form a complex microstructure, and together with the mica sheet, enhances sound wave scattering.

[0029] Based on the disclosure of the above description, those skilled in the art to which the present application belongs can also make appropriate changes and modifications to the above embodiments. Therefore, the present application is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the present application should fall within the protection scope of the claims of the present application. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the present application.

Claims

1. A sound insulation coating, characterized in that: The raw material components are as follows: 40-50 parts of deionized water, 15-20 parts of sound insulation emulsion, 0.5-0.6 parts of dispersant, 0.1-0.2 parts of wetting agent, 10-18 parts of sepiolite fiber, 1-1.5 parts of wood fiber, 10-15 parts of fine cotton, 1-1.5 parts of mica flakes, 10-15 parts of ceramsite, 0.2-0.3 parts of preservative, 0.2-0.5 parts of film-forming aid, 0.5-1 parts of ethylene glycol and 0.05-0.1 parts of thickener.

2. The sound insulation coating according to claim 1, characterized in that: The sound insulation emulsion is a styrene-acrylic acid copolymer emulsion, and the glass transition temperature of the styrene-acrylic acid ester copolymer emulsion is -16°C to 1°C.

3. The sound insulation coating according to claim 1, characterized in that: The sepiolite fiber has a needle-like structure and an aspect ratio of ≥20:1; the wood fiber is coniferous wood pulp fiber powder with a particle size of 60-100 meshes.

4. The sound insulation coating according to claim 1, characterized in that: The ceramsite is obtained by grinding porous ceramics prepared by gel injection molding-foaming, and the particle size of the ceramsite is 0-2 mm.

5. The sound insulation coating according to claim 1, characterized in that: The fine cotton is aluminum silicate fiber.

6. The sound insulation coating according to claim 1, characterized in that: The mica sheet is natural mica with a mesh size of 20 to 40.

7. The sound insulation coating according to claim 1, characterized in that: The wetting agent is a long-chain alcohol polyoxyethylene ether; the defoaming agent is a mineral oil-based foam-breaking polymer; and the dispersant is an ammonia salt dispersant.

8. The sound insulation coating according to claim 1, characterized in that: The thickener is hydroxyethyl cellulose; the preservative is a compound of 5-chloro-2-methyl-4-isothiazoline-3-one and 2-methyl-4-isothiazoline-3-one.

9. The sound insulation coating according to claim 1, characterized in that: The raw materials of the sound insulation coating also include an amine pH regulator.

10. A method for preparing the sound insulation coating according to claims 1 to 9, characterized in that: It includes the following steps: Place deionized water in a reactor, add dispersant and wetting agent in sequence at a stirring rate of 200-300 r / min, and stir until the mixture is uniform; Then adjust the speed to 600-700r / min, slowly add sepiolite fiber, wood fiber, fine cotton, and mica flakes in turn, and stir until mixed evenly; Then adjust the speed to 400-600 r / min, add ceramsite, sound insulation emulsion, film-forming aid, ethylene glycol and kasonite preservative in sequence, and stir until mixed evenly to form a homogeneous mixture; Finally, the rotation speed is adjusted to 500-600 r / min, an amine pH regulator and a thickener are added, stirred until the mixture is uniform, and filtered to obtain a sound insulation coating.

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