Sound insulation paste as well as preparation method and application thereof
By combining ordered mesoporous carbon materials and foaming stabilizers, multiple reflection and friction mechanisms are formed, which solves the problems of complex construction of floor sound insulation materials and sound bridge effect, and achieves efficient sound insulation effect and noise reduction performance.
Patent Information
- Application Number
- CN202511607122.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-05
- Publication Date
- 2026-02-13
AI Technical Summary
Existing floor sound insulation materials are complex to install, easily forming sound bridges, which leads to a decrease in sound insulation performance. In addition, some materials emit odors or are not fully foamed, affecting the effect.
By using ordered mesoporous carbon materials and specific types of foaming stabilizers, the ordered mesoporous structure and foaming work together to form multiple reflection and friction mechanisms to dissipate sound wave energy. Combined with the sound absorption of the open-pore structure after foaming, a core-shell damping unit is constructed to reduce sound propagation.
It achieves good sound insulation, reduces noise transmission, improves the sound insulation performance of the floor slab, and avoids problems such as odor emission and insufficient foaming.
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Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of sound insulation materials, and particularly relates to a sound insulation paste as well as a preparation method and application thereof. BACKGROUND
[0002] With the acceleration of urbanization, the number of high-rise buildings has increased rapidly, and the problem of insufficient floor sound insulation performance has become increasingly prominent. In daily life, the noise of footsteps, furniture movement and children running and jumping on the upper floor can easily penetrate the floor and be transmitted to the lower floor, seriously interfering with the work and rest of the residents and reducing the living comfort.
[0003] Currently, floor sound insulation mainly relies on precast coiled materials or board sound insulation materials, but such materials have obvious defects in actual application: 1) complex construction process: frequent cutting and lapping are required during laying, which not only is low in efficiency, but also easily affects the overall sound insulation effect due to improper joint treatment. 2) significant sound bridge effect: if improperly installed, rigid connections (i.e., "sound bridges") between the material and the building structure are easily formed, resulting in direct transmission of sound waves and significantly reducing the sound insulation performance.
[0004] Some studies have used polyurethane damping particles, rubber particles and rubber powder to reduce noise, but rubber itself may emit an odor (especially recycled rubber powder), which is difficult to dissipate in a closed space. Some studies have uniformly mixed thermally expandable plastic polymer hollow microspheres and film-forming substances, mixed with other film-forming substances after foaming by heating to form a coating, forming a hollow structure to improve the elasticity and sound insulation effect of the coating; however, when using thermally expandable plastic polymer hollow microspheres, the microspheres need to be expanded by 2 to 7 times in diameter by heating to a temperature above the initial foaming temperature, and temperature fluctuations in actual production may result in insufficient foaming, or the microspheres may not fully expand at low temperatures, reducing the sound insulation / damping effect.
[0005] Therefore, it is of great significance to provide a sound insulation material with good sound insulation effect. SUMMARY
[0006] The present application aims to solve one or more of the problems existing in the prior art, and at least provide a beneficial alternative. Specifically, the present application provides a sound insulation paste with good sound insulation effect.
[0007] The inventive concept of the present application: the sound insulation paste of the present application comprises an emulsion, an ordered mesoporous carbon material and a foaming stabilizer; the ordered mesoporous carbon material has an ordered hexagonal symmetry mesoporous structure; and the foaming stabilizer comprises an organosilicon-alkylene oxide copolymer. The sound insulation paste has good sound insulation effect by the combined action of the ordered mesoporous carbon material with a specific structure and the foaming stabilizer of a specific type.
[0008] Therefore, the first aspect of the present application provides a sound insulation paste.
[0009] Specifically, the sound insulation paste includes an emulsion, an ordered mesoporous carbon material, and a foaming stabilizer; The ordered mesoporous carbon material has an ordered hexagonal symmetric mesoporous structure; The foaming stabilizer includes an organosilicon-oxidized olefin copolymer.
[0010] Specifically, the ordered mesoporous carbon material possesses a regularly arranged pore structure. Transmission electron microscopy characterization reveals that the material exhibits an overall sheet-like morphology, with high-resolution images further demonstrating its ordered hexagonal symmetrical mesoporous structure. This structure endows the material with abundant mesoporous cavities, enabling it to effectively trap air molecules when used as a sound insulation material. Furthermore, it significantly dissipates sound wave energy through multiple reflections and friction within the pores, thereby enhancing sound insulation performance. When sound waves are incident, their energy is dissipated in the multi-level porous structure through the following mechanisms: (1) Air vibration friction dissipation: Sound waves force the air in the pores (surface mesopores and internal cavities) of different scales to vibrate violently, and the air molecules and the pore walls undergo viscous friction, converting sound energy into heat energy; (2) Pore wall resonance absorption: Sound waves of a specific frequency induce elastic resonance of the pore walls, and the structural vibration further consumes sound energy through internal friction; (3) Multiple reflection interference: Sound waves undergo repeated reflection and scattering between the interfaces of the hierarchical pores, which prolongs the propagation path and enhances energy dissipation; (4) Resonance absorption: Sound waves of a specific frequency induce elastic resonance of the pore walls, and the structural vibration further consumes sound energy through internal friction.
[0011] Specifically, the present invention achieves good sound insulation effect through the following aspects: (1) The ordered mesoporous carbon material and foaming work together, the ordered mesoporous structure induces sound wave scattering, and combined with the sound absorption of the open structure after foaming, noise reduction is achieved; (2) The ordered mesoporous structure induces Bragg scattering, which deflects low-frequency sound waves in a directional manner; the interconnected and open cell structure formed after foaming, i.e., the open cell network (such as PU open cell network), dissipates high-frequency sound energy through the viscous boundary layer effect; (3) Mechanical enhancement model: The ordered mesoporous carbon material and the foamed cell wall construct a core-shell damping unit. Under dynamic load, the hollow shell undergoes elastic buckling deformation. During the unloading stage, the shell rebound and the polymer chain entropy elastic recovery work synchronously, which can convert sound energy into heat energy to reduce the propagation of sound.
[0012] Preferably, the emulsion comprises a polyurethane emulsion.
[0013] Preferably, the latex particles in the emulsion have a particle size of 27-220 nm; more preferably, the latex particles in the emulsion have a particle size of 30-200 nm.
[0014] Preferably, the particle size of the ordered mesoporous carbon material is 2-50 nm.
[0015] Preferably, the sound insulation paste comprises, by weight, 65-85 parts emulsion, 2.7-5.5 parts ordered mesoporous carbon material, and 1.8-3.3 parts foaming stabilizer.
[0016] More preferably, by weight, the sound insulation paste comprises 70-80 parts emulsion, 3-5 parts ordered mesoporous carbon material, and 2-3 parts foaming stabilizer.
[0017] Preferably, the sound insulation paste further includes at least one of fillers, dispersants, thickeners, mildew inhibitors, and preservatives.
[0018] Preferably, the sound insulation paste further includes fillers, dispersants, thickeners, mildew inhibitors, and preservatives, and by weight, the sound insulation paste comprises 65-85 parts emulsion, 2.7-5.5 parts ordered mesoporous carbon material, 1.8-3.3 parts foaming stabilizer, 16-27 parts fillers, 0.45-0.85 parts dispersant, 1.3-3.3 parts thickener, 0.05-0.33 parts mildew inhibitor, and 0.05-0.28 parts preservative.
[0019] More preferably, the sound insulation paste further includes fillers, dispersants, thickeners, mildew inhibitors, and preservatives, and by weight, the sound insulation paste includes 70-80 parts of emulsion, 3-5 parts of ordered mesoporous carbon material, 2-3 parts of foaming stabilizer, 18-25 parts of filler, 0.5-0.8 parts of dispersant, 1.5-3 parts of thickener, 0.05-0.3 parts of mildew inhibitor, and 0.05-0.25 parts of preservative.
[0020] Preferably, the filler includes at least one of heavy calcium carbonate, titanium dioxide, and kaolin.
[0021] Preferably, the dispersant comprises a block copolymer type dispersant; more preferably, the block copolymer type dispersant comprises an acrylate block copolymer dispersant.
[0022] Preferably, the thickener comprises an alkali-swellable thickener.
[0023] Preferably, the antifungal agent includes isothiazolinone antifungal agents.
[0024] Preferably, the preservative includes benzisothiazolinone preservatives.
[0025] A second aspect of the present invention provides a method for preparing the sound-insulating paste described in the first aspect of the present invention.
[0026] Specifically, the preparation method of the sound-insulating paste includes the following steps: Mix all the raw material components.
[0027] Preferably, the method for preparing the sound-insulating paste includes the following steps: The emulsion is stirred, and then the foaming stabilizer, dispersant, filler, ordered mesoporous carbon material, and thickener are added. The mixture is dispersed at high speed, and then the speed is reduced. A mildew inhibitor and a preservative are added, and stirring is continued to obtain the sound insulation paste.
[0028] Preferably, the stirring speed when stirring the emulsion is 450-650 r / min; more preferably, the stirring speed when stirring the emulsion is 500-600 r / min.
[0029] Preferably, the high-speed dispersion rotation speed is 750-1600 r / min; more preferably, the high-speed dispersion rotation speed is 800-1500 r / min.
[0030] Preferably, the high-speed dispersion time is 7-15 min; more preferably, the high-speed dispersion time is 8-12 min; and even more preferably, the high-speed dispersion time is 10 min.
[0031] Preferably, the foaming stabilizer, dispersant, filler, and ordered mesoporous carbon material are added and then stirred independently at a stirring speed of 750-1400 r / min; more preferably, the stirring speed is 800-1300 r / min. The stirring time is determined by ensuring uniform mixing.
[0032] Preferably, the reduced rotational speed is 350-650 r / min; more preferably, the reduced rotational speed is 400-600 r / min.
[0033] A third aspect of the present invention provides the application of the sound-insulating paste described in the first aspect of the present invention in building materials.
[0034] Compared with the prior art, the beneficial effects of the technical solution provided by the present invention are as follows: This invention uses ordered mesoporous carbon materials and specific types of foaming stabilizers. The ordered mesoporous carbon materials work synergistically with foaming, and the ordered mesoporous structure induces sound wave scattering. Combined with the sound absorption of the open-pore structure after foaming, the sound insulation paste has a good sound insulation effect and achieves noise reduction. Detailed Implementation
[0035] To enable those skilled in the art to more clearly understand the technical solutions described in this invention, the following embodiments are provided for illustration. It should be noted that the following embodiments do not constitute a limitation on the scope of protection claimed by this invention.
[0036] Unless otherwise specified, the raw materials, reagents or devices used in the following examples are available from conventional commercial sources or can be obtained by existing known methods.
[0037] The sources of the relevant raw material components in the embodiments and comparative examples of this invention are as follows: Leasys 3472 polyurethane emulsion was purchased from Wanhua Chemical Group Co., Ltd. Foaming stabilizer EP-112, purchased from Evonik Industries; Dispersant LCN 070 was purchased from Clariant Chemicals (China) Co., Ltd. The precipitated calcium carbonate has a mesh size of 250 and was purchased from Omia Calcium Industry (Changshu) Co., Ltd. Ordered mesoporous carbon material CMK-3 was purchased from Suzhou Kaifa New Material Technology Co., Ltd. Thickener A801 was purchased from Wanhua Chemical Group Co., Ltd. The anti-mold agent is Rozone. TM Purchased from Dow Chemical (China) Co., Ltd. in 2000; The preservative was Proxel® BD 20, purchased from Lanxess Chemicals (China) Co., Ltd.
[0038] Example 1 This embodiment provides a sound insulation paste, which, by weight, consists of 70 parts polyurethane emulsion, 2 parts foaming stabilizer, 0.5 parts dispersant, 22.9 parts 250-mesh heavy calcium carbonate, 3 parts ordered mesoporous carbon material, 1.5 parts thickener, 0.05 parts mildew inhibitor, and 0.05 parts preservative.
[0039] The preparation process of the above sound insulation paste is as follows: Add polyurethane emulsion to a dispersion container and stir for 1 minute using a disperser at 500 rpm. Add foaming and stabilizing agent, and stir using a disperser at 800 r / min to ensure uniform mixing; Add the dispersant and stir using a disperser at 800 r / min to ensure uniform mixing; Add 250-mesh heavy calcium carbonate and stir using a disperser at 800 rpm to ensure uniform mixing; Add ordered mesoporous carbon material and stir using a disperser at 800 r / min to ensure uniform mixing; Add thickener and stir with dispersant at 1000 r / min for 10 min; then reduce the speed to 500 r / min, add mildew inhibitor and preservative in sequence, stir for 3 min, stop stirring, and obtain sound insulation paste.
[0040] Example 2 This embodiment provides a sound insulation paste, which, by weight, consists of 80 parts polyurethane emulsion, 3 parts foaming stabilizer, 0.5 parts dispersant, 21.9 parts 250-mesh heavy calcium carbonate, 3 parts ordered mesoporous carbon material, 1.5 parts thickener, 0.05 parts mildew inhibitor, and 0.05 parts preservative.
[0041] The preparation process of the above sound insulation paste is as follows: Add polyurethane emulsion to a dispersion container and stir for 1 minute using a disperser at 500 rpm. Add foaming and stabilizing agent, and stir using a disperser at 800 r / min to ensure uniform mixing; Add the dispersant and stir using a disperser at 800 r / min to ensure uniform mixing; Add 250-mesh heavy calcium carbonate and stir using a disperser at 800 rpm to ensure uniform mixing; Add ordered mesoporous carbon material and stir using a disperser at 800 r / min to ensure uniform mixing; Add thickener and stir with dispersant at 1000 r / min for 10 min; then reduce the speed to 500 r / min, add mildew inhibitor and preservative in sequence, stir for 3 min, stop stirring, and obtain sound insulation paste.
[0042] Example 3 This embodiment provides a sound insulation paste, which, by weight, consists of 70 parts polyurethane emulsion, 2 parts foaming stabilizer, 0.5 parts dispersant, 20.9 parts 250-mesh heavy calcium carbonate, 5 parts ordered mesoporous carbon material, 1.5 parts thickener, 0.05 parts mildew inhibitor, and 0.05 parts preservative.
[0043] The preparation process of the above sound insulation paste is as follows: Add polyurethane emulsion to a dispersion container and stir for 1 minute using a disperser at 500 rpm. Add foaming and stabilizing agent, and stir using a disperser at 800 r / min to ensure uniform mixing; Add the dispersant and stir using a disperser at 800 r / min to ensure uniform mixing; Add 250-mesh heavy calcium carbonate and stir using a disperser at 800 rpm to ensure uniform mixing; Add ordered mesoporous carbon material and stir using a disperser at 800 r / min to ensure uniform mixing; Add thickener and stir with dispersant at 1000 r / min for 10 min; then reduce the speed to 500 r / min, add mildew inhibitor and preservative in sequence, stir for 3 min, stop stirring, and obtain sound insulation paste.
[0044] Example 4 This embodiment provides a sound insulation paste, which, by weight, consists of 80 parts of polyurethane emulsion, 3 parts of foaming stabilizer, 0.5 parts of dispersant, 21.9 parts of 250-mesh heavy calcium carbonate, 5 parts of ordered mesoporous carbon material, 1.5 parts of thickener, 0.05 parts of mildew inhibitor, and 0.05 parts of preservative.
[0045] The preparation process of the above sound insulation paste is as follows: Add the polyurethane emulsion to the dispersion container and stir using a disperser at 500 r / min. Add foaming and stabilizing agent, and stir using a disperser at 800 r / min to ensure uniform mixing; Add the dispersant and stir using a disperser at 800 r / min to ensure uniform mixing; Add 250-mesh heavy calcium carbonate and stir using a disperser at 800 rpm to ensure uniform mixing; Add ordered mesoporous carbon material and stir using a disperser at 800 r / min to ensure uniform mixing; Add thickener and stir with dispersant at 1000 r / min for 10 min; then reduce the speed to 500 r / min, add mildew inhibitor and preservative in sequence, stir for 3 min, stop stirring, and obtain sound insulation paste.
[0046] Comparative Example 1 The only difference between Comparative Example 1 and Example 1 is that Comparative Example 1 uses sodium dodecyl sulfate as a foaming stabilizer to replace the foaming stabilizer in Example 1 in an equal amount; otherwise, they are the same as in Example 1.
[0047] Comparative Example 2 The only difference between Comparative Example 2 and Example 1 is that Comparative Example 2 uses hollow glass microspheres HL20 (purchased from Zhengzhou Shenglait) to replace the ordered mesoporous carbon material in Example 1 in an equal amount; otherwise, it is the same as Example 1.
[0048] Comparative Example 3 The only difference between Comparative Example 3 and Example 1 is that Comparative Example 3 uses AG-D aerogel (purchased from Shenzhen Zhongning Technology Co., Ltd.) to replace the ordered mesoporous carbon material in Example 1 in an equal amount; otherwise, it is the same as Example 1.
[0049] Performance testing The sound insulation performance of the sound insulation pastes prepared in Examples 1-4 and Comparative Examples 1-3 was tested, and the specific test methods are as follows: Using a 600mm×600mm×9mm mold, the sound insulation pastes of Examples 1-4 and Comparative Examples 1-3 were applied into the mold in three coats. After the material was fully dried, the mold was removed to obtain test samples. Then, the weighted normalized impact sound pressure level of the test samples obtained from Examples 1-4 and Comparative Examples 1-3 was tested in accordance with GB / T19889.6-2005. The test results are shown in Table 1.
[0050] Table 1: Performance test results of sound-insulating pastes in Examples 1-4 and Comparative Examples 1-3
[0051] As can be seen from Table 1, the sound insulation paste of the present invention has a good sound insulation effect.
[0052] Comparative Example 1 used sodium dodecyl sulfate as a foaming stabilizer, Comparative Example 2 used hollow microspheres, and Comparative Example 3 used aerogel. This resulted in the sound insulation performance of Comparative Examples 1-3 being inferior to that of Example 1. This demonstrates that the use of specific foaming stabilizers and ordered mesoporous carbon materials in this invention can significantly improve the sound insulation performance of the sound insulation paste.
[0053] In summary, this invention utilizes ordered mesoporous carbon materials and specific types of foaming stabilizers, combined with other components, to achieve excellent sound insulation properties in the sound insulation paste.
[0054] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.
Claims
1. A sound-insulating paste, characterized in that, The sound insulation paste includes an emulsion, ordered mesoporous carbon material, and a foaming stabilizer; The ordered mesoporous carbon material has an ordered hexagonal symmetric mesoporous structure; The foaming stabilizer includes an organosilicon-oxidized olefin copolymer.
2. The sound-insulating paste according to claim 1, characterized in that, The emulsion includes a polyurethane emulsion.
3. The sound-insulating paste according to claim 1, characterized in that, The latex particles in the emulsion have a particle size of 27-220 nm.
4. The sound-insulating paste according to claim 1, characterized in that, The ordered mesoporous carbon material has a pore size of 2-50 nm.
5. The sound-insulating paste according to any one of claims 1-4, characterized in that, The sound insulation paste comprises, by weight, 65-85 parts emulsion, 2.7-5.5 parts ordered mesoporous carbon material, and 1.8-3.3 parts foaming stabilizer.
6. The sound-insulating paste according to any one of claims 1-4, characterized in that, The sound insulation paste also includes at least one of the following: filler, dispersant, thickener, mildew inhibitor, and preservative.
7. The sound-insulating paste according to claim 6, characterized in that, The sound insulation paste also includes fillers, dispersants, thickeners, mildew inhibitors, and preservatives. By weight, the sound insulation paste comprises 65-85 parts emulsion, 2.7-5.5 parts ordered mesoporous carbon material, 1.8-3.3 parts foaming stabilizer, 16-27 parts fillers, 0.45-0.85 parts dispersant, 1.3-3.3 parts thickener, 0.05-0.33 parts mildew inhibitor, and 0.05-0.28 parts preservative.
8. The sound-insulating paste according to claim 7, characterized in that, The filler includes at least one of heavy calcium carbonate, titanium dioxide, and kaolin; and / or, the dispersant includes a block copolymer type dispersant; and / or, the thickener includes an alkali-swellable type thickener; and / or, the fungicide includes isothiazolinone fungicide; and / or, the preservative includes benzisothiazolinone preservative.
9. The method for preparing the sound-insulating paste according to any one of claims 1-8, characterized in that, The preparation method includes the following steps: Mix all the raw material components.
10. The use of the sound-insulating paste according to any one of claims 1-8 in building materials.