A sound insulation coating, its preparation method and application

Abstract

The present invention discloses a sound insulation coating, its preparation method and application, belonging to the technical field of architectural coatings. The sound insulation coating of the present invention combines an elastic emulsion and an elastic filler, improving the sound insulation effect and water resistance of the coating, and enhancing the adaptability of the coating to mortar and substrates; the sound insulation mortar is a two-component mortar, achieving a high sound absorption effect of the coating, while improving the crack resistance and sound insulation of the coating. The sound insulation coating of the present invention adopts a "sandwich" structure, and the sound absorption of the sound insulation mortar and the elastic shock absorption of the sound insulation coating can achieve sound insulation and noise reduction at different frequencies, realizing double sound insulation, reducing noise caused by vibration from the source, and having a wide range of application scenarios.

Description

Technical Field

[0001] The present invention belongs to the technical field of architectural coatings, and particularly relates to a sound insulation coating, a preparation method thereof, and an application thereof. Background Art

[0002] Subway rail transit has greatly improved the convenience of urban residents' travel and made outstanding contributions to the construction of cities. However, with the rapid development of rail transit, the derived noise problem has become increasingly serious. Among them, the noise in the subway staff lounge has seriously affected the work and rest of subway staff. Therefore, solving the sound insulation and noise reduction problem in subway stations has become one of the focuses of attention.

[0003] Currently, the materials for indoor floor and ground sound insulation and noise reduction mainly include sound insulation pads, sound insulation coatings, sound insulation mortars, etc., and the sound insulation structures are usually floating floor structures, lightweight sound insulation mortar structures, sound insulation pad structures, etc. Among them, the floor sound insulation pad and floating floor have good noise reduction performance, but the air-laid design of the sound insulation pad and floating floor is not conducive to the bonding of the ceramic tile layer, resulting in a too thick structure layer occupying space in later use and poor sound insulation effect in later stage. The prior art has developed a flame-retardant and water-resistant sound insulation coating by adding inorganic fillers and flame retardants to a silicon-acrylic emulsion system; prepared a damping sound insulation coating by combining an emulsion with special cement and adding rubber particles; developed a two-component sound insulation coating for floor and ground sound insulation and noise reduction; prepared a shock-absorbing and sound insulation coating on the floor based on an acrylic emulsion and a fiber system; developed a two-component sound insulation mortar by using ordinary Portland cement lightweight mortar and rubber emulsion; designed a sound insulation floor structure based on lightweight concrete sound insulation mortar; designed a gypsum leveling floor sound insulation floor structure based on gypsum self-leveling sound insulation mortar; and realized the design of a shock-absorbing and noise-reducing structure layer by laying a coarse sand layer on the sound insulation coating. However, the above-mentioned sound insulation coatings have poor water resistance and cohesive strength. Even when adding cement in a two-component form, there are still defects in the bonding compatibility with tile adhesive during tile laying construction; and the sound insulation mortar adopts a complete silicate cement combined with a lightweight filler system, which has a slow drying speed after construction and is prone to cracking, reducing the sound insulation effect and having a greater risk; in addition, the sound insulation mortar with a two-component system combined with an emulsion can solve some later cracking problems, but still easily has hidden cracks, etc.

[0004] In view of the problems existing in the above-mentioned sound insulation materials, finding a sound insulation material with good sound insulation effect is the current research focus. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a sound insulation coating, a preparation method thereof, and an application thereof. The sound insulation coating has excellent sound insulation effect, strong stability, adjustable thickness, and a wide range of application scenarios.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, the present invention provides a sound insulation coating, which includes at least two sound insulation coating layers and a sound insulation mortar disposed between the at least two sound insulation coating layers;

[0008] The sound insulation coating layer includes the following raw materials: a low glass transition temperature polymer emulsion, rubber particles, vermiculite, nano kaolin, sodium silicate, and cationic polyacrylamide;

[0009] The glass transition temperature of the low glass transition temperature polymer emulsion is ≤0°C, and the solid content is ≥50%;

[0010] The sound insulation mortar layer includes component B1 and component B2. Component B1 includes sulfoaluminate cement, expanded perlite beads, rubber particles, and expanded vermiculite, and component B2 includes a high glass transition temperature polymer emulsion;

[0011] The glass transition temperature of the high glass transition temperature polymer emulsion is >0°C, and the solid content is ≥50%.

[0012] Existing coating formulations generally have problems of poor water resistance and cohesion strength, and have defects in the bonding compatibility with tile adhesives during tile laying construction; moreover, the sound insulation mortar used in the prior art is a completely silicate cement combined with a lightweight filler system, which has a slow drying rate after construction, is prone to cracking, reduces the sound insulation effect, and has a relatively high risk; currently, the two-component sound insulation mortar can only solve some problems of late coating cracking, but still easily has hidden cracks, etc., which is not conducive to the construction of long-term sound insulation performance; and in terms of structural design, the structural designs of existing floating floors, sound insulation pads, sound insulation coatings, and sound insulation mortars all solve the noise reduction of impact sound insulation on the upper layer of the floor structure, and do not solve the problem of sound insulation and noise reduction of air vibration from the lower layer of the floor structure.

[0013] First, in view of the problems of poor water resistance and cohesion strength existing in the above coating formulation, the present invention uses an elastic emulsion with Tg≤0°C and a solid content ≥50% and combines it with elastic fillers to prepare a sound insulation coating layer with water resistance and fire resistance properties, which can have good adaptability with tile adhesive materials; in the sound insulation coating layer, the incorporation of nano kaolin solves the problem of cohesion strength, and rubber particles, vermiculite, sodium silicate, and cationic polyacrylamide can make the coating achieve uniform dispersion, help the structure to form a film, improve the sound insulation performance and water resistance performance, realize the improvement of the cohesion strength of the sound insulation coating, enhance the adaptability to the mortar and the substrate, and make the bonding strength of the entire floor and ground component reach 0.4 MPa, which meets the project acceptance requirements of the "Testing Standard for Bonding Strength of Facing Tiles in Building Engineering" JGJ 110-2018, solving the problem that the bonding strength of the previous floor and ground sound insulation coating could not be measured.

[0014] Second, the sound-insulating mortar of the present invention is a two-component system, including component B1 and component B2. The sound-insulating mortar is doped with a polymer emulsion with Tg > 0°C and a solid content ≥ 50% in the sulfoaluminate cement and vitrified microbead quick-drying system. The polymer emulsion is introduced into the porous structure of the quick-drying lightweight mortar to construct a dual structure of sound insulation, shock absorption, sound absorption, and noise reduction, achieving sound absorption and sound insulation of noises with different frequencies. Rubber particles and modified expanded vermiculite are added to achieve a high sound absorption effect of the material, and at the same time, the crack resistance and sound insulation of the material can be greatly improved; the problem of insufficient cohesive strength of the mortar in the prior art is solved.

[0015] Third, in terms of structural design, the sound-insulating paint of the present invention includes a sound-insulating coating, a sound-insulating mortar, and a sound-insulating coating stacked in sequence, adopting a "sandwich" structure. The sound absorption of the sound-insulating mortar and the elastic shock absorption and sound absorption of the sound-insulating coating can achieve sound insulation and noise reduction of different frequencies, realizing double sound insulation. On the one hand, it reduces the noise problem caused by the operation of indoor equipment. On the other hand, this structure can reduce the noise caused by the vibration of the subway entering the station from the source.

[0016] As a preferred embodiment of the sound-insulating paint of the present invention, the thickness ratio of the sequentially stacked sound-insulating coating, sound-insulating mortar, and sound-insulating coating is 3-10:30-50:3-6; the inventor found that the specific thickness ratio of the above-mentioned sound-insulating coating, sound-insulating mortar, and sound-insulating coating can effectively solve the double-layer sound insulation and noise reduction between the upper and lower floors of the indoor floor slab; in addition, the thickness of the sound-insulating paint of the present invention has strong adjustability and a wider application scenario.

[0017] As a preferred embodiment of the sound-insulating paint of the present invention, the weight parts of each raw material in the sound-insulating coating are: 30-50 parts of a low glass transition temperature polymer emulsion, 6-15 parts of rubber particles, 5-15 parts of vermiculite, 5-15 parts of nano kaolin, 2-4 parts of sodium silicate, and 1-2 parts of cationic polyacrylamide.

[0018] As a preferred embodiment of the sound-insulating paint of the present invention, the weight parts of each raw material in component B1 are: 15-35 parts of sulfoaluminate cement, 15-35 parts of vitrified microbeads, 5-15 parts of rubber particles, and 5-10 parts of expanded vermiculite. The weight part of the high glass transition temperature polymer emulsion in component B2 is 35-55 parts.

[0019] As a preferred embodiment of the sound-insulating paint of the present invention, the sound-insulating coating also includes 10-35 parts of quartz sand, 1-4 parts of functional additives, and 5-15 parts of water.

[0020] As a preferred embodiment of the sound-insulating paint of the present invention, component B1 also includes 5-35 parts of quartz sand, 1-4 parts of functional additives, and 5-10 parts of calcium powder; component B2 also includes 2.05-7.1 parts of functional additives and 45-65 parts of water.

[0021] As a more preferred embodiment of the sound insulation coating of the present invention, the functional additives include at least one of a thickener, a water reducing agent, a plasticizer, an antifoaming agent, a bactericide, and a preservative.

[0022] As a more preferred embodiment of the sound insulation coating of the present invention, in the sound insulation coating layer, the functional additives include a thickener, an antifoaming agent, and a bactericide.

[0023] As the most preferred embodiment of the sound insulation coating of the present invention, in the sound insulation coating layer, the mass ratio of the antifoaming agent, the thickener, and the bactericide is 2-4:0.1-0.5:0.01-0.3.

[0024] As a more preferred embodiment of the sound insulation coating of the present invention, in the component B1, the functional additives include a thickener, a water reducing agent, and a preservative.

[0025] As the most preferred embodiment of the sound insulation coating of the present invention, in the component B1, the mass ratio of the thickener, the water reducing agent, and the preservative is 1-4:0.01-0.3:0.1-0.3.

[0026] As a more preferred embodiment of the sound insulation coating of the present invention, in the component B2, the functional additives include a plasticizer, an antifoaming agent, and a bactericide.

[0027] As the most preferred embodiment of the sound insulation coating of the present invention, in the component B2, the mass ratio of the antifoaming agent, the plasticizer, and the bactericide is 1-2:1-5:0.05-0.1.

[0028] As a preferred embodiment of the sound insulation coating of the present invention, the mass ratio of the component B1 to the component B2 is component B1: component B2 = 4-7:1-3.

[0029] As a preferred embodiment of the sound insulation coating of the present invention, in the sound insulation coating layer:

[0030] The mesh number of the rubber particles is 40 mesh - 70 mesh;

[0031] The mesh number of the vermiculite is 40 mesh - 70 mesh;

[0032] The sodium silicate is sodium silicate nonahydrate;

[0033] The antifoaming agent is an organosilicon antifoaming agent;

[0034] The thickener is a cellulose ether, and the cellulose ether includes at least one of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the viscosity of the cellulose ether is 20000m - 30000mPa·S.

[0035] The active ingredient of the bactericide is an isothiazolinone compound.

[0036] As a preferred embodiment of the sound insulation coating of the present invention, in the component B1:

[0037] The vitrified microspheres are 30 - 50 mesh;

[0038] The rubber particles are 40 - 70 mesh;

[0039] The thickener is cellulose ether, and the cellulose ether includes at least one of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the viscosity of the cellulose ether is 20000m - 30000mPa.S;

[0040] The water reducing agent is a polycarboxylate water reducing agent;

[0041] The preservative is sodium citrate dihydrate.

[0042] As a preferred embodiment of the floor component of the present invention, in the component B2:

[0043] The active ingredient of the bactericide is an isothiazolinone compound.

[0044] Second, the present invention provides a preparation method of the sound insulation coating as described in the first aspect, and the preparation method includes the following steps:

[0045] Prepare the sound insulation coating: Pre - mix the low glass transition temperature polymer emulsion, rubber particles, vermiculite, quartz sand, nano - kaolin, sodium silicate, cationic polyacrylamide, and water, and then add the functional additives. After mixing evenly, obtain the sound insulation coating;

[0046] Prepare the component B1: Pre - mix the sulfoaluminate cement, vitrified microspheres, rubber particles, quartz sand, expanded vermiculite, and calcium powder, and then add the functional additives. After mixing evenly, obtain the component B1;

[0047] Prepare the component B2: Mix the high glass transition temperature polymer emulsion, water, and functional additives evenly to obtain the component B2;

[0048] Prepare the sound insulation mortar: Mix the component B1 and the component B2 evenly to obtain the sound insulation mortar;

[0049] Prepare the sound insulation coating: Coat in sequence of the sound insulation coating, the sound insulation mortar, and the sound insulation coating to obtain the sound insulation coating.

[0050] Third, the present invention provides a floor component, and the floor component includes the sound insulation coating as described in the first aspect.

[0051] As a preferred embodiment of the floor component of the present invention, the floor component further includes a ceramic tile layer, a ceramic tile adhesive layer, and a concrete layer.

[0052] As a more preferred embodiment of the floor component of the present invention, the floor component is laminated in sequence with a ceramic tile layer, a tile adhesive layer, a sound insulation coating layer, and a concrete layer.

[0053] As the most preferred embodiment of the floor component of the present invention, the thickness ratio of each layer in the floor component is: ceramic tile layer: tile adhesive layer: sound insulation coating layer: concrete layer = 10:5 - 20:36 - 66:120 - 140.

[0054] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0055] (1) The present invention uses an elastic emulsion with Tg ≤ 0°C and a solid content ≥ 50% in combination with an elastic filler to prepare a sound insulation coating with water resistance and fire resistance, improving the sound insulation performance and water resistance, achieving an increase in the cohesive strength of the sound insulation coating, and enhancing the adaptability to mortar and substrates;

[0056] (2) The sound insulation mortar of the present invention is a two-component system, including component B1 and component B2. The sound insulation mortar is doped with a polymer emulsion with Tg > 0°C and a solid content ≥ 50% in a sulfoaluminate cement and vitrified microbead quick-drying system, and rubber particles and modified expanded vermiculite are added, achieving a high sound absorption effect of the material, and at the same time, the crack resistance and sound insulation of the material can be greatly improved; solving the problem of insufficient cohesive strength of the mortar in the prior art;

[0057] (3) The sound insulation coating of the present invention includes a sound insulation coating layer and a sound insulation mortar laminated in sequence. The sound insulation coating adopts a "sandwich" structure. The sound absorption of the sound insulation mortar and the elastic shock absorption sound absorption of the sound insulation coating can achieve sound insulation and noise reduction at different frequencies, realizing double sound insulation. On the one hand, it reduces the noise problem caused by the operation of indoor equipment. On the other hand, this structure can reduce the noise caused by the vibration of the subway entering the station from the source. Description of the Drawings

[0058] Figure 1 Schematic diagram of the floor component of the present invention;

[0059] (1): Ceramic tile layer, (2): Tile adhesive layer, (3): Sound insulation coating layer, (31): Sound insulation coating layer, (32): Sound insulation mortar layer, (33): Sound insulation coating layer, (4): Concrete layer;

[0060] Figure 2 Picture of the sound insulation coating layer of the present invention;

[0061] Figure 3 Picture of the coating layer of the sound insulation mortar of the present invention;

[0062] Figure 4 Finished product picture of the floor component of the present invention. Detailed implementation manners

[0063] To better illustrate the purpose, technical solution and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0064] The reagents, methods and equipment used in the present invention are all conventional reagents, methods and equipment in the technical field, unless otherwise specified.

[0065] Examples 1 - 5

[0066] The formulations of the sound insulation coatings described in Examples 1 - 5 are shown in Table 1 below, and the formulations of components B1 and B2 are shown in Table 2 below. The preparation method of the sound insulation coating includes the following steps:

[0067] Preparing the sound insulation coating: Add the low glass transition temperature polymer emulsion, rubber particles, vermiculite, quartz sand, nano - kaolin, sodium silicate, cationic polyacrylamide, and water into a bucket container in sequence according to the formulation in Table 1, stir and mix evenly, then add the functional additives, manually stir, and then put it into a JC / T681 - 2005 planetary cement mortar mixer and stir at a low speed for 15 minutes to mix evenly to obtain the sound insulation coating;

[0068] Preparing component B1: Premix the sulfoaluminate cement, expanded perlite, rubber particles, quartz sand, expanded vermiculite, and calcium powder in a dry powder mixer according to the formulation in Table 2, then add the functional additives, and then use a JC / T681 - 2005 planetary cement mortar mixer to stir at a low speed for 5 minutes to mix evenly to obtain component B1;

[0069] Preparing component B2: Mix the high glass transition temperature polymer emulsion, water and functional additives evenly in a mixer and stir for 5 minutes to obtain component B2;

[0070] Preparing the sound insulation mortar: Weigh according to the mass ratio of B1:B2 = 4:1. First, pour component B2 into a container, then add component B1, manually stir in advance, and then put it into a JC / T681 - 2005 planetary cement mortar mixer and stir at a low speed for 5 minutes to mix evenly to obtain the sound insulation mortar;

[0071] Preparing the sound insulation coating: Coat in sequence according to the sound insulation coating, sound insulation mortar, and sound insulation coating. Specifically, first construct the sound insulation coating with a thickness of 3 mm - 10 mm. After it is completely dried, construct layer B with a thickness of 30 - 50 mm. After it is completely dried, construct the sound insulation coating again with a thickness of 3 mm - 6 mm; thus obtaining the sound insulation coating.

[0072] Table 1

[0073]

[0074] Table 2

[0075]

[0076]

[0077] Comparative Example 1

[0078] The difference between this comparative example and the sound insulation coating described in Example 1 is only that: there is only one layer of sound insulation coating, that is, the sound insulation coating only includes sound insulation mortar and 1 layer of sound insulation coating stacked in sequence; the rest are the same as those in Example 1.

[0079] Comparative Example 2

[0080] The difference between this comparative example and the sound insulation coating described in Example 1 is only that: it does not include sound insulation mortar, that is, the sound insulation coating only includes at least two layers of sound insulation coating stacked in sequence; the rest are the same as those in Example 1.

[0081] Comparative Example 3

[0082] The difference between this comparative example and the sound insulation coating described in Example 1 is only that: it does not include component B1; the rest are the same as those in Example 1.

[0083] Comparative Example 4

[0084] The difference between this comparative example and the sound insulation coating described in Example 1 is only that: it does not include component B2; the rest are the same as those in Example 1.

[0085] Comparative Example 5

[0086] The difference between this comparative example and the sound insulation coating described in Example 1 is only that: when preparing the sound insulation coating, a polymer emulsion with Tg > 0 °C is used; the rest are the same as those in Example 1.

[0087] Comparative Example 6

[0088] The difference between this comparative example and the sound insulation coating described in Example 1 is only that: when preparing component B2, a polymer emulsion with Tg < 0 °C is used; the rest are the same as those in Example 1.

[0089] Performance Test

[0090] 1. The sound insulation coatings and sound insulation mortars described in Examples 1 - 5 are respectively subjected to the following tests. The test results of the sound insulation coatings are shown in Table 3 below, and the test results of the sound insulation mortars are shown in Table 4 below.

[0091] Table 3

[0092]

[0093] Table 4

[0094]

[0095] According to the results in Table 3, in the sound insulation coatings described in Examples 1-5 of the present invention, the sound insulation coatings all adopt an elastic emulsion with Tg≤0°C and a solid content ≥50% combined with elastic fillers. The incorporation of nano kaolin solves the problem of cohesive strength. Rubber particles, vermiculite, sodium silicate, and cationic polyacrylamide can make the coating achieve uniform dispersion, help the structure form a film, improve the sound insulation performance and water resistance performance, realize the improvement of the cohesive strength of the sound insulation coating, enhance the adaptability to mortar and substrates, and make the bonding strength of the entire floor component reach 0.4 MPa, which meets the engineering acceptance requirements of the "Test Standard for Bonding Strength of Facing Tiles in Building Engineering" JGJ 110-2018, solving the problem that the bonding strength of the previous floor sound insulation coating for tile pasting could not be measured.

[0096] According to the results in Table 4, in the sound insulation coatings described in Examples 1-5 of the present invention, the sound insulation mortar is a two-component system, including component B1 and component B2. The sound insulation mortar is doped with a polymer emulsion with Tg>0°C and a solid content ≥50% in the sulfoaluminate cement and vitrified microbead quick-drying system. The polymer emulsion is introduced into the porous structure of the quick-drying lightweight mortar to construct a dual structure of sound insulation and shock absorption and sound absorption and noise reduction, realizing sound absorption and sound insulation of noises with different frequencies, and adding rubber particles and modified expanded vermiculite to achieve a high sound absorption effect of the material, greatly improving the crack resistance and sound insulation of the material.

[0097] 2. The sound insulation coatings described in the above examples and comparative examples are made into floor components together with a ceramic tile layer, a tile adhesive layer, and a concrete layer. The schematic diagram of the floor component is as Figure 1 shown; the sound insulation performance of the floor component is tested, and the test results are shown in Table 5 and Table 6 below.

[0098] Table 5

[0099]

[0100] Table 6

[0101]

[0102]

[0103] According to the data in Table 5 and Table 6, the sound insulation coating of the present invention includes a sound insulation coating, a sound insulation mortar, and a sound insulation coating stacked in sequence, adopting a "sandwich" structure. The sound absorption of the sound insulation mortar and the elastic shock absorption and sound absorption of the sound insulation coating can achieve sound insulation and noise reduction at different frequencies, realizing double sound insulation. On the one hand, it reduces the noise problems caused by the operation of indoor equipment. On the other hand, this structure can reduce the noise caused by the vibration of the subway entering the station from the source.

[0104] Comparative Examples 1-6 have poor sound insulation effects on the final floor slabs because their formulations are different from those of the present invention or they do not adopt the "sandwich" structure of the present invention.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A sound insulation coating, characterized in that, The sound insulation coating includes at least two layers of sound insulation coatings and sound insulation mortar disposed between the at least two layers of sound insulation coatings; The sound insulation coating comprises the following raw materials: Low glass transition temperature polymer emulsion, rubber particles, vermiculite, nano kaolin, sodium silicate, cationic polyacrylamide; The weight parts of each raw material in the sound insulation coating are: 30 - 50 parts of low glass transition temperature polymer emulsion, 6 - 15 parts of rubber particles, 5 - 15 parts of vermiculite, 5 - 15 parts of nano kaolin, 2 - 4 parts of sodium silicate, 1 - 2 parts of cationic polyacrylamide; The glass transition temperature of the low glass transition temperature polymer emulsion ≤ 0 °C, and the solid content ≥ 50%; The sound insulation mortar layer includes component B1 and component B2. Component B1 includes sulfoaluminate cement, vitrified microspheres, rubber particles, expanded vermiculite, and component B2 includes high glass transition temperature polymer emulsion; The weight parts of each raw material in component B1 are: 15 - 35 parts of sulfoaluminate cement, 15 - 35 parts of vitrified microspheres, 5 - 15 parts of rubber particles, 5 - 10 parts of expanded vermiculite. The weight part of the high glass transition temperature polymer emulsion in component B2 is 35 - 55 parts; The mass ratio of component B1 to component B2 is component B1: component B2 = 4 - 7:1 - 3; The glass transition temperature of the high glass transition temperature polymer emulsion > 0 °C, and the solid content ≥ 50%.

2. The sound insulation coating according to claim 1, wherein The sound insulation coating also includes 10 - 35 parts of quartz sand, 1 - 4 parts of functional additives, and 5 - 15 parts of water.

3. The sound-insulating paint according to claim 1, wherein, Component B1 also includes 5 - 35 parts of quartz sand, 1 - 4 parts of functional additives, and 5 - 10 parts of calcium powder; Component B2 also includes 2.05 - 7.1 parts of functional additives and 45 - 65 parts of water.

4. The sound insulation coating according to claim 1, wherein The low glass transition temperature polymer emulsion includes acrylic emulsion, styrene-acrylic emulsion, polyurethane emulsion; The high glass transition temperature polymer emulsion includes acrylic emulsion, styrene-acrylic emulsion, polyurethane emulsion.

5. The sound insulation coating according to claim 2 or 3, wherein The functional additives include at least one of thickener, water reducer, plasticizer, defoamer, bactericide, preservative.

6. The preparation method of the sound insulation coating according to any one of claims 1-5, characterized in that The preparation method includes the following steps: Preparing the sound insulation coating: premixing the low glass transition temperature polymer emulsion, rubber particles, vermiculite, quartz sand, nano kaolin, sodium silicate, cationic polyacrylamide, and water, then adding the functional additives, and mixing evenly to obtain the sound insulation coating; Preparing component B1: premixing the sulfoaluminate cement, vitrified microspheres, rubber particles, quartz sand, expanded vermiculite, and calcium powder, then adding the functional additives, and mixing evenly to obtain component B1; Preparing component B2: mixing the high glass transition temperature polymer emulsion, water, and functional additives evenly to obtain component B2; Preparing the sound insulation mortar: mixing component B1 and component B2 evenly to obtain the sound insulation mortar; Preparing the sound insulation coating: coating in sequence according to the sound insulation coating, sound insulation mortar, and sound insulation coating to obtain the sound insulation coating.

7. A floor component, characterized in that, The floor member includes the sound insulation coating as described in any one of claims 1 - 5.

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