Soundproofing coating, method for its production and use

Abstract

The application belongs to the technical field of coatings, and particularly relates to a sound insulation coating as well as a preparation method and application thereof. The sound insulation coating is prepared from the following components: a butylphenyl emulsion, artificial stone waste, waste rubber powder, basalt rock wool, functional particles and cellulose ether. The functional particles have a metal solid waste-containing core and a shell formed by solidified resin coated on the surface of the core. The density of the metal solid waste is >1.5 g / cm 3 The application applies the principle of acoustic metamaterial structure to the field of building floor sound insulation, can achieve excellent low-frequency sound insulation effect, applies waste materials to the sound insulation coating to realize effective recycling of the waste materials, improves the green environmental protection of the preparation raw materials, and reduces the material cost. Furthermore, the sound insulation coating prepared by the application has the advantages of simple preparation process and convenient construction process.

Description

Technical Field

[0001] This invention belongs to the field of coating technology, specifically relating to a sound-insulating coating, its preparation method, and its application. Background Technology

[0002] In the design strategies of low-carbon and energy-saving building design and green building ecological energy-saving design, noise reduction and sound insulation of buildings are indispensable. With the development of green buildings, people's requirements for the acoustic environment of buildings are constantly increasing. In GB / T50378-2019 "Evaluation Standard for Green Buildings", the impact sound requirements for the floor slabs of two-star and three-star buildings are <70dB and <65dB, respectively. Poor sound insulation of the floor slabs of residential buildings, especially poor impact sound insulation, is a long-standing problem that has not been effectively solved. At present, the floor slabs of unfinished houses basically do not meet the requirements, and even houses with conventional wood flooring are difficult to meet the requirements for impact sound insulation. Indoor noise pollution affects people's work and life, and seriously endangers people's health. Existing low-frequency noise control generally uses large-scale concrete structures or complex composite structures, which are not only difficult to manufacture but also expensive. Due to the long sound waves of low-frequency noise, it attenuates slowly in the air and has strong penetrating power. Traditional materials, due to their weak internal losses, are difficult to achieve effective sound attenuation. Over the past 20 years, with the emergence and development of new materials, noise control technology has made phased progress, but there is still a lack of research on the performance of sound insulation coatings for building floors. Currently, it has been found that the low-frequency sound insulation effect of most sound insulation coatings still needs to be improved.

[0003] Related technologies disclose a sound insulation structure with low-frequency broadband sound insulation function. This structure increases sound transmission loss by more than 40% and improves the sound wave attenuation capability of the material. However, it employs multiple periodically arranged sound insulation units, resulting in a complex structure and cumbersome construction. This may lead to quality problems such as ground cracking and hollowing, making it unsuitable for use in building floor sound insulation coatings. Related technologies also disclose a low-frequency sound-absorbing and insulating structural component. This component is simple to fabricate and inexpensive, providing engineering application value for noise control in the low-frequency range. It uses a localized resonant acoustic metamaterial sound-absorbing and insulating structural component. This material structure can achieve excellent low-frequency sound insulation effects and is suitable for wall panel structures, but not for floor sound insulation. Existing technologies have prepared sound insulation coatings based on low-frequency sound insulation films. While these materials can achieve low-frequency sound insulation effects, their construction process is cumbersome, hindering on-site construction and increasing the construction period.

[0004] Therefore, it is necessary to provide a sound insulation coating for use in the field of building floor sound insulation, in order to improve the low-frequency sound insulation effect of the floor sound insulation coating without the need for a complex structure. Summary of the Invention

[0005] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a sound-insulating coating, its preparation method, and its application. This invention applies the principles of acoustic metamaterial structures to the field of building floor sound insulation, achieving excellent low-frequency sound insulation effects; the application of waste materials to the sound-insulating coating enables the effective recycling of waste materials, improving the green and environmentally friendly nature of the raw materials and reducing material costs; furthermore, the sound-insulating coating prepared by this invention has the advantages of simple preparation and convenient construction.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a sound-insulating coating, wherein the raw materials for preparing the sound-insulating coating include the following components:

[0009] Styrene-butadiene emulsion, artificial stone waste, waste rubber powder, basalt rock wool, functional particles, cellulose ether;

[0010] The functional particles have a core containing metallic solid waste and a shell formed of cured resin covering the surface of the core.

[0011] This invention uses styrene-butadiene emulsion, artificial stone waste, waste rubber powder, basalt rock wool, functional particles, and cellulose ether as raw materials. The styrene-butadiene emulsion acts as a binder; the artificial stone waste improves the stiffness and density of the coating; the waste rubber powder improves the damping and sound insulation properties of the coating; the basalt rock wool improves the stiffness and density of the coating and provides sound insulation, fire resistance, and crack resistance; the cellulose ether provides water retention and crack resistance, preventing cracking and delamination; the functional particles utilize the principle of local resonance to encapsulate denser materials into small-sized functional particles with a "core-shell structure." These functional particles are uniformly incorporated into the sound-insulating coating, improving its low-frequency sound insulation effect. The combined effect of these components results in excellent overall performance of the coating.

[0012] Specifically, this invention can improve the low-frequency sound insulation effect of building floors, and also apply the principles of acoustic metamaterial structures to the field of building floor sound insulation, reducing costs and simplifying the process. Furthermore, the sound-insulating coating of this invention also has strong tensile bond strength and excellent construction performance.

[0013] This invention utilizes acoustic metamaterials based on the principle of local resonance, which have broad prospects for practical engineering applications. Local resonance acoustic metamaterials change the natural frequency of the structure through resonant coupling of the internal structure, broaden the low-frequency sound absorption range, optimize the low-frequency sound absorption and insulation performance, and make up for the shortcomings of traditional sound absorption and insulation materials in addressing low-frequency noise issues.

[0014] In some embodiments of the present invention, the raw materials for preparing the sound-insulating coating include the following components in parts by weight:

[0015] Styrene-butadiene emulsion 20-30 parts, artificial stone waste 5-15 parts, waste rubber powder 5-10 parts, basalt rock wool 2-5 parts, functional particles 1-30 parts, cellulose ether 1-3 parts.

[0016] In some embodiments of the present invention, the raw materials for preparing the sound-insulating coating further include a first auxiliary agent.

[0017] In some embodiments of the present invention, the raw materials for preparing the sound-insulating coating include the following components in parts by weight:

[0018] Styrene-butadiene emulsion 20-30 parts, artificial stone waste 5-15 parts, waste rubber powder 5-10 parts, basalt rock wool 2-5 parts, functional particles 1-30 parts, cellulose ether 1-3 parts, first auxiliary agent 0.5-4 parts.

[0019] In some embodiments of the present invention, the raw materials for preparing the sound-insulating coating also include water.

[0020] In some embodiments of the present invention, the raw materials for preparing the sound-insulating coating include the following components in parts by weight:

[0021] Styrene-butadiene emulsion 20-30 parts, artificial stone waste 5-15 parts, waste rubber powder 5-10 parts, basalt rock wool 2-5 parts, functional particles 1-30 parts, cellulose ether 1-3 parts, first auxiliary agent 0.5-4 parts, water 20-40 parts.

[0022] In some embodiments of the present invention, the raw materials for preparing the sound-insulating coating include the following components in parts by weight:

[0023] Styrene-butadiene emulsion 20-30 parts, artificial stone waste 8-12 parts, waste rubber powder 5-8 parts, basalt rock wool 3-5 parts, functional particles 10-30 parts, cellulose ether 1-3 parts, first auxiliary agent 0.5-2 parts, water 20-40 parts.

[0024] In some embodiments of the present invention, the raw materials for preparing the sound-insulating coating include the following components in parts by weight:

[0025] 25 parts styrene-butadiene emulsion, 8-12 parts artificial stone waste, 5 parts waste rubber powder, 4 parts basalt rock wool, 10-20 parts functional particles, 2 parts cellulose ether, 1 part first auxiliary agent, and 35 parts water.

[0026] In some embodiments of the present invention, the functional particles are obtained by mixing component A and component B and then extruding and granulating them; wherein, component A includes a polymer resin and a silane coupling agent, and component B includes metal solid waste.

[0027] In some embodiments of the present invention, component A comprises 50-90 parts of polymeric resin and 0.1-0.3 parts of silane coupling agent; preferably, component A comprises 50-70 parts of polymeric resin and 0.1-0.3 parts of silane coupling agent; more preferably, component A comprises 50-60 parts of polymeric resin and 0.1-0.3 parts of silane coupling agent. The polymeric resin has a glass transition temperature of -5°C to 20°C. Preferably, the polymeric resin comprises at least one of epoxy resin and unsaturated polyester. The silane coupling agent is selected from at least one of KH550, KH560, and KH570.

[0028] In some embodiments of the present invention, component A further includes 0.2-0.6 parts of a second auxiliary agent, for example, 0.2-0.4 parts or 0.2 parts.

[0029] In some embodiments of the present invention, component B comprises 10-40 parts of metallic solid waste, including but not limited to 20-40 parts or 30-40 parts, wherein the metallic solid waste is selected from at least one of iron tailings slag, steel slag, copper slag, lead slag, zinc slag, and nickel slag. The particle size of the metallic solid waste ranges from 0.1 to 0.8 mm, and the density is greater than 1.5 g / cm³. 3 For example: 2-10g / cm 3 This invention selects metal smelting waste slag with a particle size range of 0.1-0.8 mm, which is beneficial for dispersion and addition; in addition, this particle size range can achieve a particle size greater than 1.5 g / cm³. 3 The density of the sound increases, thereby improving the low-frequency sound insulation effect.

[0030] In some embodiments of the present invention, component B further includes 0.1-0.5 parts of a third adjuvant.

[0031] In some embodiments of the present invention, the particle size of the functional particles is 0.5-10 mm. The particle size of the functional particles can be controlled by adjusting the liquid output, etc. For example, to achieve a particle size range of 0.5-10 mm, the dripping speed is controlled to be 0.1-1 mL / min during the extrusion granulation process.

[0032] In some embodiments of the present invention, the method for preparing the functional particles includes the following steps:

[0033] Mix component A and component B, stir for 5-15 minutes, inject into a glue applicator, granulate by extrusion, and dry to obtain the functional particles.

[0034] In some preferred embodiments of the present invention, the method for preparing the functional particles includes the following steps:

[0035] The polymer resin is stirred with a silane coupling agent and a second auxiliary agent until completely dispersed. Then, metal solid waste and a third auxiliary agent are added and mixed. The mixture is injected into a glue applicator, extruded and granulated, and dried to obtain the functional particles.

[0036] In some embodiments of the present invention, the stirring time is 2-10 min.

[0037] In some embodiments of the present invention, the mixing time is 10-20 minutes.

[0038] In some embodiments of the present invention, the solid content of the styrene-butadiene emulsion is 45%-55%, the emulsion particle size is 100-150 nm, and the viscosity is 500-3000 mPa·s (23±2℃).

[0039] In some embodiments of the present invention, the artificial stone waste is obtained by drying and grinding the waste slurry after grinding and polishing inorganic artificial stone.

[0040] In some embodiments of the present invention, the particle size of the artificial stone waste is 200-500 mesh.

[0041] In some embodiments of the present invention, the main components of the artificial stone waste include: calcium carbonate and polymer resin.

[0042] In some embodiments of the present invention, the particle size of the waste rubber powder is 200-500 mesh.

[0043] Waste rubber is a major solid pollutant, causing numerous environmental, social, and economic problems. Traditional waste rubber disposal methods, such as simple landfilling and incineration, easily lead to even greater environmental pollution. Recycling is an effective way to treat waste rubber; therefore, this invention applies waste rubber powder to the preparation of coating materials. However, according to existing technology reports, the surface of waste rubber powder is usually non-polar with few functional groups, and direct addition to the polymer matrix may result in poor interfacial bonding. This invention synergizes waste rubber with other components, which can improve system compatibility and further improve coating performance.

[0044] Furthermore, the present invention selects waste rubber powder with a particle size of 200-500 mesh, which is convenient for subsequent addition and subsequent drying and molding steps.

[0045] In some embodiments of the present invention, the basalt rock wool has a diameter of 3-15 μm and a length of 5-20 mm.

[0046] Within the scope of this invention, the longer the length and the thicker the diameter of basalt rock wool, the lower its content.

[0047] In some embodiments of the present invention, the cellulose ether is selected from at least one of carboxymethyl cellulose and hydroxypropyl methyl cellulose.

[0048] In some embodiments of the present invention, the first auxiliary agent includes at least one of the following: defoamer (including but not limited to: emulsified silicone oil, higher carbon alcohol fatty acid ester complex, polyoxyethylene polyoxypropylene pentaerythritol ether), thickener (including but not limited to: methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropyl methylcellulose), dispersant (including but not limited to: triethylhexylphosphate, sodium lauryl sulfate), wetting agent (including but not limited to: polyoxyethylene alkylphenol ether, polyoxyethylene fatty alcohol ether), and film-forming aid (including but not limited to: propylene glycol butyl ether, propylene glycol methyl ether acetate). The defoamer accounts for 10%-30% of the weight of the first auxiliary agent, the thickener accounts for 1%-10% of the weight of the first auxiliary agent, the dispersant accounts for 40%-60% of the weight of the first auxiliary agent, the wetting agent accounts for 10%-20% of the weight of the first auxiliary agent, and the film-forming aid accounts for 5%-15% of the weight of the first auxiliary agent.

[0049] In some embodiments of the present invention, the second auxiliary agent includes at least one of a thickener (including but not limited to: methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulose) and a dispersant (including but not limited to: triethylhexylphosphate, sodium dodecyl sulfate). The thickener and the dispersant constitute 40%-60% of the weight of the second auxiliary agent.

[0050] In some embodiments of the present invention, the third auxiliary agent includes at least one of stabilizers (including but not limited to: magnesium stearate, aluminum stearate, potassium stearate).

[0051] In some embodiments of the present invention, the sound-insulating coating is particularly suitable for low-frequency sound insulation of building (floor) floors, for example, 50-1000Hz sound insulation and 50-5000Hz sound insulation.

[0052] In a second aspect, the present invention provides a method for preparing the above-mentioned sound-insulating coating, comprising mixing the styrene-butadiene emulsion, artificial stone waste, waste rubber powder, basalt rock wool, functional particles, and cellulose ether to obtain the coating.

[0053] In some embodiments of the present invention, the preparation method includes the following steps:

[0054] Add defoamer, thickener, dispersant, and wetting agent to water and stir at 300-500 rpm / min for 3-10 min; then add cellulose ether, artificial stone waste, and waste rubber powder to water in sequence and stir at 1000-1500 rpm / min for 5-15 min; then add film-forming aid and stir at 300-500 rpm / min for 1-5 min; then add styrene-butadiene emulsion and stir for 1-5 min; then add basalt rock wool and stir at 500-700 rpm / min for 5-10 min; finally add functional particles and stir for 10-20 min to obtain the final product.

[0055] In a third aspect, the present invention provides a sound-insulating coating, said sound-insulating coating being prepared from the above-described sound-insulating coating material.

[0056] In some embodiments of the present invention, the sound insulation coating is particularly suitable for low-frequency sound insulation of building (floor) floors, for example, 50-1000Hz sound insulation and 50-5000Hz sound insulation.

[0057] The sound-insulating coating according to embodiments of the present invention has at least the following beneficial effects:

[0058] (1) Applying the principle of acoustic metamaterial structure to the field of building floor sound insulation, truly solving the low-frequency sound insulation problem, and providing engineering application value for the sound insulation control of the low-frequency range of the floor; Local resonant acoustic metamaterial is an artificial material structure that uses the vibration characteristics of structural units to block the propagation of sound waves. It can achieve low-frequency sound insulation in a specific frequency band with a small surface density.

[0059] (2) Combined with solid waste materials, it truly solves the problem of low-carbon and environmentally friendly sound insulation coatings;

[0060] (3) It achieves excellent sound insulation performance, and has high strength, low cost and convenient construction. Attached Figure Description

[0061] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0062] Figure 1 This is an electron microscope image of the low-frequency sound insulation functional particles of the present invention. Detailed Implementation

[0063] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0064] In the description of this invention, the use of terms such as "first," "second," etc., is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0065] The terms "preferred," "more preferably," etc., used in this invention refer to embodiments of the invention that provide certain beneficial effects under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the description of one or more preferred embodiments does not imply that other embodiments are unavailable, nor is it intended to exclude other embodiments from the scope of this invention.

[0066] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0067] "Prepared from" is synonymous with "comprising". The terms "comprising", "including", "having", "containing", or any other variations thereof as used herein are intended to cover non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that includes the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article, or apparatus.

[0068] "Parts by mass" refers to the basic unit of measurement that expresses the mass ratio of multiple components. One part can represent any unit mass, such as 1g or 2.689g. If we say that component A has "a" parts by mass and component B has "b" parts by mass, it means the ratio of the mass of component A to the mass of component B is a:b. Alternatively, it can mean that the mass of component A is aK and the mass of component B is bK (K is any number representing a multiplier). It is important to understand that, unlike the number of parts by mass, the sum of the mass parts of all components is not limited to 100 parts.

[0069] Unless otherwise specified, "about" in this invention means that the allowable error is within ±2%.

[0070] "And / or" is used to indicate that one or both of the described situations may occur, for example, A and / or B includes (A and B) and (A or B).

[0071] Example

[0072] In this invention, unless otherwise specified, all equipment and raw materials are available from the market or commonly used in the industry. Unless otherwise specified, the methods in the following embodiments are conventional methods in the art.

[0073] In the specific embodiments of this invention, the raw materials are purchased from:

[0074] The styrene-butadiene emulsion preferably has a solid content of 45%-55%, an emulsion particle size of 100-150 nm, and a viscosity of 500-3000 mPa·s. The styrene-butadiene emulsion used in the embodiments of the present invention is BASF SD516.

[0075] The epoxy resin is Phoenix brand E51;

[0076] The unsaturated polyester is Jiangsu Xinyang Technology's unsaturated polyester resin 196#;

[0077] The silane coupling agent is Nanjing Jingtianwei Chemical KH550;

[0078] The defoamer is a silicone-based defoamer, specifically BYK1799;

[0079] The thickener is a hydrophobic polyether thickening rheology modifier, specifically BASF Rheovis PE1330;

[0080] The dispersant is triethanolamine salt, specifically BYK190;

[0081] The wetting agent is fatty alcohol polyoxyethylene ether, specifically GSK-588;

[0082] The film-forming aid is propylene glycol butyl ether;

[0083] The stabilizer is Clariant light stabilizer PR-31;

[0084] In the embodiments of this invention, the particle size of the artificial stone waste is controlled to be 200-500 mesh;

[0085] In the embodiments of the present invention, the particle size of the waste rubber powder used is controlled at 200-500 mesh;

[0086] The basalt rock wool used in this embodiment of the invention has a diameter of 5μm and a length of 10mm.

[0087] Example 1

[0088] This embodiment provides a low-frequency sound-insulating functional particle and the sound-insulating coating prepared therefrom, specifically:

[0089] (I) First, prepare low-frequency sound insulation functional particles. Add 59.5 parts of epoxy resin (glass transition temperature -5℃), then add 0.1 parts of silane coupling agent, 0.1 parts of thickener, and 0.1 parts of dispersant. Mix and stir for 5 minutes until completely dispersed. Then add 40 parts of iron tailings slag (particle size 0.1mm, density 7.8g / cm³). 3 Add 0.2 parts of stabilizer. Stir for 15 minutes, then inject into a glue applicator for extrusion granulation, and dry for later use. Particles with a diameter of 0.5-10 mm are prepared by controlling the dripping amount.

[0090] (II) At room temperature, add 0.2 parts of defoamer, 0.05 parts of thickener, 0.5 parts of dispersant, and 0.15 parts of wetting agent sequentially to 35 parts of water, stirring at 300-500 rpm for 5 minutes; then add 2 parts of cellulose ether, 8 parts of artificial stone waste, and 5 parts of waste rubber powder sequentially to the aqueous solution, stirring at 1000-1500 rpm for 10 minutes. Add 0.1 parts of film-forming aid, stirring at 300-500 rpm for 3 minutes, then add 25 parts of styrene-butadiene emulsion, stirring for 3 minutes; add 4 parts of basalt rock wool, stirring at 500-700 rpm for 10 minutes; add 10 parts of low-frequency sound-insulating functional particles, stirring for 15 minutes to obtain the low-frequency sound-insulating coating.

[0091] Example 2

[0092] This embodiment provides a low-frequency sound-insulating functional particle and the sound-insulating coating prepared therefrom, specifically:

[0093] (I) First, prepare low-frequency sound insulation functional particles. Add 59.5 parts of epoxy resin (glass transition temperature -5℃), then add 0.1 parts of silane coupling agent, 0.1 parts of thickener, and 0.1 parts of dispersant. Mix and stir for 5 minutes until completely dispersed. Then add 40 parts of iron tailings slag (particle size 0.3mm, density 7.8g / cm³). 3 Add 0.2 parts of stabilizer. Stir for 15 minutes, then inject into a glue applicator for extrusion granulation, and dry for later use. Particles with a diameter of 0.5-10 mm are prepared by controlling the dripping amount.

[0094] (II) At room temperature, add 0.2 parts of defoamer, 0.05 parts of thickener, 0.5 parts of dispersant, and 0.15 parts of wetting agent sequentially to 35 parts of water, stirring at 300-500 rpm for 5 minutes; then add 2 parts of cellulose ether, 8 parts of artificial stone waste, and 5 parts of waste rubber powder sequentially to water, stirring at 1000-1500 rpm for 10 minutes. Add 0.1 parts of film-forming aid, stirring at 300-500 rpm for 3 minutes, then add 25 parts of styrene-butadiene emulsion, stirring for 3 minutes; add 4 parts of basalt rock wool, stirring at 500-700 rpm for 10 minutes; add 20 parts of low-frequency sound-insulating functional particles, stirring for 15 minutes to obtain the low-frequency sound-insulating coating.

[0095] Example 3

[0096] This embodiment provides a low-frequency sound-insulating functional particle and the sound-insulating coating prepared therefrom, specifically:

[0097] (I) First, prepare low-frequency sound-insulating functional particles. Add 59.4 parts of unsaturated polyester (glass transition temperature 0℃), then add 0.1 parts of silane coupling agent, 0.1 parts of thickener, and 0.1 parts of dispersant. Mix and stir for 5 minutes until completely dispersed. Then add 40 parts of iron tailings slag (particle size range 0.5mm, density 4.5g / cm³). 3 Add 0.3 parts of stabilizer. Stir for 15 minutes, then inject into a glue applicator for extrusion granulation, and dry for later use. Particles with a diameter of 0.5-10 mm are prepared by controlling the dripping amount.

[0098] (II) At room temperature, add 0.2 parts of defoamer, 0.05 parts of thickener, 0.5 parts of dispersant, and 0.15 parts of wetting agent sequentially to 35 parts of water, stirring at 300-500 rpm for 5 minutes; then add 2 parts of cellulose ether, 8 parts of artificial stone waste, and 5 parts of waste rubber powder sequentially to water, stirring at 1000-1500 rpm for 10 minutes. Add 0.1 parts of film-forming aid, stirring at 300-500 rpm for 3 minutes, then add 25 parts of styrene-butadiene emulsion, stirring for 3 minutes; add 4 parts of basalt rock wool, stirring at 500-700 rpm for 10 minutes; add 20 parts of low-frequency sound-insulating functional particles, stirring for 15 minutes to obtain the low-frequency sound-insulating coating.

[0099] Example 4

[0100] This embodiment provides a low-frequency sound-insulating functional particle and the sound-insulating coating prepared therefrom, specifically:

[0101] (I) First, prepare low-frequency sound-insulating functional particles. Add 59.4 parts of unsaturated polyester (glass transition temperature 0℃), 0.1 parts of silane coupling agent, 0.1 parts of thickener, and 0.1 parts of dispersant. Mix and stir for 5 minutes until completely dispersed. Then add 40 parts of iron tailings slag (particle size range 0.5mm, density 4.5g / cm³). 3 Add 0.3 parts of stabilizer. Stir for 15 minutes, then inject into a glue applicator for extrusion granulation, and dry for later use. Particles with a diameter of 0.5-10 mm are prepared by controlling the dripping amount.

[0102] (II) At room temperature, add 0.2 parts of defoamer, 0.05 parts of thickener, 0.5 parts of dispersant, and 0.15 parts of wetting agent sequentially to 35 parts of water, stirring at 300-500 rpm for 5 minutes; then add 2 parts of cellulose ether, 12 parts of artificial stone waste, and 5 parts of waste rubber powder sequentially to water, stirring at 1000-1500 rpm for 10 minutes. Add 0.1 parts of film-forming aid, stirring at 300-500 rpm for 3 minutes, then add 25 parts of styrene-butadiene emulsion, stirring for 3 minutes; finally, add 20 parts of low-frequency sound-insulating functional particles and stir for 15 minutes to obtain the low-frequency sound-insulating coating.

[0103] Comparative Example 1

[0104] This comparative example provides a sound insulation coating, specifically:

[0105] At room temperature, 0.2 parts of defoamer, 0.05 parts of thickener, 0.2 parts of dispersant, 0.15 parts of wetting agent, and 0.3 parts of KH550 silane coupling agent were sequentially added to 40 parts of water at a speed of 300-500 rpm for 5 minutes. Then, 7 parts of cellulose ether, 8 parts of artificial stone waste, and 5 parts of waste rubber powder were sequentially added to water at a speed of 1000-1500 rpm for 10 minutes. 0.1 parts of film-forming aid were added, followed by 4 parts of basalt rock wool at a speed of 300-500 rpm for 3 minutes. Finally, 35 parts of styrene-butadiene emulsion were added, and the mixture was stirred for 3 minutes at a speed of 500-700 rpm for 15 minutes to obtain the sound-insulating coating.

[0106] Comparative Example 2

[0107] This comparative example provides a sound insulation coating, specifically:

[0108] (1) First, prepare a low-frequency sound insulation film. First, add 59.5 parts of styrene-butadiene emulsion (glass transition temperature -15℃), then add 0.1 parts of silane coupling agent, 0.1 parts of thickener, and 0.1 parts of dispersant and mix for 5 minutes. After complete dispersion, add 40 parts of iron tailings slag (particle size 0.1mm, density 3.6g / cm³). 3 Add 0.2 parts of stabilizer. Stir for 15 minutes, then spread into a film and dry for later use.

[0109] (2) At room temperature, 0.2 parts of defoamer, 0.05 parts of thickener, 0.2 parts of dispersant, 0.15 parts of wetting agent, and 0.3 parts of KH550 silane coupling agent were added sequentially to 40 parts of water at a speed of 300-500 rpm / min for 5 min. Then, 7 parts of cellulose ether, 8 parts of artificial stone waste, and 5 parts of waste rubber powder were added sequentially to water at a speed of 1000-1500 rpm / min for 10 min. 0.1 parts of film-forming aid were added, followed by 4 parts of basalt rock wool at a speed of 300-500 rpm / min for 3 min. Then, 35 parts of styrene-butadiene emulsion were added at a speed of 500-700 rpm / min for 15 min to obtain the sound insulation coating. The mixture of (1) and (2) was laid and cured. A sound insulation test was conducted after 7 days.

[0110] Comparative Example 3

[0111] This comparative example provides a low-frequency sound-insulating functional particle and the sound-insulating coating prepared therefrom, specifically:

[0112] (I) First, prepare low-frequency sound-insulating functional particles. Add 59.4 parts of styrene-butadiene emulsion (glass transition temperature -15℃), then add 0.1 parts of silane coupling agent, 0.1 parts of thickener, and 0.1 parts of dispersant. Mix and stir for 5 minutes until completely dispersed. Then add 40 parts of iron tailings slag (particle size range 0.5mm, density 4.5g / cm³). 3 Then add 0.3 parts of stabilizer. After stirring for 15 minutes, inject into a glue applicator for extrusion granulation, and dry for later use (the injection volume remains the same as in the example).

[0113] (II) At room temperature, add 0.2 parts of defoamer, 0.05 parts of thickener, 0.5 parts of dispersant, and 0.15 parts of wetting agent to 35 parts of water in sequence, stirring at 300-500 rpm for 5 minutes; then add 2 parts of cellulose ether, 12 parts of artificial stone waste, and 5 parts of waste rubber powder to water in sequence, stirring at 1000-1500 rpm for 10 minutes. Add 0.1 parts of film-forming aid, stirring at 300-500 rpm for 3 minutes, then add 25 parts of styrene-butadiene emulsion, stirring for 3 minutes; finally, add 20 parts of low-frequency sound-insulating functional particles and stir for 15 minutes to obtain the low-frequency sound-insulating coating.

[0114] Comparative Example 4

[0115] This comparative example provides a low-frequency sound-insulating functional particle and the sound-insulating coating prepared therefrom, specifically:

[0116] (I) First, prepare low-frequency sound-insulating functional particles. Add 59.4 parts of unsaturated polyester (glass transition temperature 0℃), 0.1 parts of silane coupling agent, 0.1 parts of thickener, and 0.1 parts of dispersant. Mix and stir for 5 minutes until completely dispersed. Then add 40 parts of artificial stone waste (particle size range 0.8mm, density 1.2g / cm³). 3 Add 0.3 parts of stabilizer. Stir for 15 minutes, then inject into a glue applicator for extrusion granulation, and dry for later use. Particles with a diameter of 0.5-10 mm are prepared by controlling the dripping amount.

[0117] (II) At room temperature, add 0.2 parts of defoamer, 0.05 parts of thickener, 0.5 parts of dispersant, and 0.15 parts of wetting agent to 35 parts of water in sequence, stirring at 300-500 rpm for 5 minutes; then add 2 parts of cellulose ether, 8 parts of artificial stone waste, and 5 parts of waste rubber powder to water in sequence, stirring at 1000-1500 rpm for 10 minutes. Add 0.1 parts of film-forming aid, stirring at 300-500 rpm for 3 minutes, then add 25 parts of styrene-butadiene emulsion, stirring for 3 minutes; finally, add 4 parts of basalt rock wool and 20 parts of low-frequency sound insulation functional particles in sequence, stirring at 500-700 rpm for 15 minutes to obtain the low-frequency sound insulation coating.

[0118] Test case

[0119] Electron micrographs of the low-frequency sound-insulating functional particles obtained in the examples are shown below. Figure 1 As shown, the particle size of the obtained particles is 0.5-10 mm.

[0120] The sound insulation coatings from Examples 1-4, Comparative Examples 1-4, and commercially available products (purchased from Tubainian, Sound Insulation Coating 9100) were laid in films with a dry film thickness of 3 mm. After curing at room temperature for seven days, the sound insulation performance and physical performance were tested in accordance with the standard GB / T 19889.8 Acoustics of Buildings and Building Components - Part 8: Laboratory Measurement of Impact Sound Improvement of Heavy Standard Floor Slab Coatings and JG / T24-2018 Synthetic Resin Emulsion Sand-textured Building Coatings. The test results are shown in Tables 1 and 2 below.

[0121] Table 1

[0122]

[0123]

[0124] Table 2

[0125]

[0126] From the test results in Tables 1 and 2, we can conclude that:

[0127] (1) As can be seen from the test data of the examples, the coating with added low-frequency sound insulation functional particles by extrusion granulation exhibits excellent sound insulation performance in the low-frequency range of the test, and has excellent tensile bond strength and construction performance.

[0128] (2) By comparing the examples and comparative examples 1 and 2, the functional particles obtained by granulation have significantly better low-frequency sound insulation performance than pre-made low-frequency films or sound insulation coatings that directly mix the raw materials together; and the overall sound insulation is also improved.

[0129] (3) By comparing the examples and Comparative Example 3, replacing unsaturated polyester or epoxy resin with styrene-butadiene emulsion leads to a decrease in sound insulation effect. This is because polymers with different glass transition temperatures provide different "shell" damping to the sound insulation functional particles, and the low-frequency sound absorption and insulation performance is optimized through the resonant coupling of the internal structure.

[0130] (4) By comparing the examples and Comparative Example 4, reducing the density of the core material in the low-frequency sound insulation functional particles will significantly degrade the low-frequency sound insulation effect of the sound insulation coating.

[0131] The above description provides a detailed account of the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

Claims

1. A sound-insulating coating, characterized in that, The sound-insulating coating is used for low-frequency sound insulation of building floors, and the raw materials for preparing the sound-insulating coating include the following components: Styrene-butadiene emulsion, artificial stone waste, waste rubber powder, basalt rock wool, functional particles, cellulose ether; The functional particles have a core containing metal solid waste and a shell formed of cured resin covering the surface of the core. The density of the metal solid waste is >1.5 g / cm³. 3 ; The functional particles have a particle size of 0.5-10 mm; the functional particles are obtained by mixing component A and component B and then extruding and granulating; wherein, component A includes a polymer resin and a silane coupling agent, and component B includes metal solid waste; the polymer resin includes at least one of epoxy resin and unsaturated polyester.

2. The sound-insulating coating according to claim 1, characterized in that, The raw materials for preparing the sound-insulating coating include the following components in parts by weight: Styrene-butadiene emulsion 20-30 parts, artificial stone waste 5-15 parts, waste rubber powder 5-10 parts, basalt rock wool 2-5 parts, functional particles 1-30 parts, cellulose ether 1-3 parts.

3. The sound-insulating coating according to claim 1, characterized in that, Component A comprises 50-90 parts of polymeric resin and 0.1-0.3 parts of silane coupling agent; Optionally, component B includes 10 to 40 parts of metallic solid waste.

4. The sound-insulating coating according to any one of claims 1-3, characterized in that, The solid content of the styrene-butadiene emulsion is 45%-55%, the emulsion particle size is 100-150 nm, and the viscosity is 500-3000 mPa·s.

5. The sound-insulating coating according to any one of claims 1-3, characterized in that, The artificial stone waste is obtained by drying and grinding the waste slurry after grinding and polishing inorganic artificial stone. Optionally, the particle size of the artificial stone waste is 200-500 mesh.

6. The sound-insulating coating according to any one of claims 1-3, characterized in that, The particle size of the waste rubber powder is 200-500 mesh.

7. The sound-insulating coating according to any one of claims 1-3, characterized in that, The diameter of the basalt rock wool is 3-15 μm; Optionally, the length of the basalt rock wool is 5-20 mm.

8. The method for preparing the sound-insulating coating as described in any one of claims 1-7, characterized in that, Includes the following steps: The styrene-butadiene emulsion, artificial stone waste, waste rubber powder, basalt rock wool, functional particles, and cellulose ether are mixed to obtain the final product.

9. A sound-insulating coating, characterized in that, The sound insulation coating is prepared from the sound insulation coating according to any one of claims 1-7.

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