Sound-absorbing coating and preparation process thereof

Abstract

The invention discloses a sound-absorbing coating and a manufacturing process thereof, and belongs to the technical field of building coatings, and the sound-absorbing coating is prepared from the following raw materials in parts by weight: 200-280 parts of water, 2-10 parts of a preservative, 1-4.5 parts of cellulose, 1-5 parts of a multifunctional additive, 50-90 parts of an emulsion, 1-7 parts of a coalescing agent, 230-280 parts of vermiculite, 180-220 parts of velvet fibers, 50-100 parts of floating beads, 115-145 parts of mineral fibers, 1-6 parts of a thickening agent and 7-12 parts of a foam leading agent. The sound-absorbing coating prepared by the invention is finally mixed together to form a channel consisting of countless small gaps and countless tiny holes which are connected together, so that enough channels are left on the surface of the sound-absorbing coating for sound to enter, the sound is adsorbed into the sound-absorbing coating through the countless small black holes, and the sound is not easy to flow out once entering the sound-absorbing coating. Sound rubs left and right in the channel, through air viscous resistance and the heat conduction effect in the coating, a considerable part of sound energy is converted into heat energy through sound wave energy in the process, the heat energy is gradually consumed along with time, the sound absorption effect is achieved, and high-strength sound absorption, sound insulation, heat insulation and heat preservation performance is achieved.

Description

Technical Field

[0001] This invention relates to the field of architectural coatings technology, specifically to a sound-absorbing coating and its manufacturing process. Background Technology

[0002] Sound-absorbing coatings, also known as sound-absorbing spraying, refer to a 2-10mm thick porous cotton-like coating material made primarily of biological fibers and mineral fibers, combined with other fire retardants, moisture-proofing agents, and mildew-proofing agents. This material is sprayed together with an adhesive using specialized machinery and adheres to the interior roof and walls.

[0003] However, since sound-absorbing coatings are usually applied to walls or ceilings, they are affected by environmental factors such as temperature, humidity and ultraviolet rays over a long period of time, which leads to a decline in the performance of the material and loss of sound absorption effect. Similarly, under long-term use and environmental changes, they are prone to aging, cracking and peeling. Therefore, a sound-absorbing coating and its manufacturing process are proposed. Summary of the Invention

[0004] This invention aims to address at least one of the technical problems in existing technologies: the performance of materials deteriorates and they lose their sound-absorbing effect due to prolonged exposure to environmental factors such as temperature, humidity, and ultraviolet radiation; similarly, they are prone to aging, cracking, and peeling under long-term use and environmental changes. Therefore, one objective of this invention is to provide a sound-absorbing coating and its manufacturing process.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A sound-absorbing coating is composed of the following raw materials in parts by weight: 200-280 parts water, 2-10 parts preservative, 1-4.5 parts cellulose, 1-5 parts multifunctional additive, 50-90 parts emulsion, 1-7 parts film-forming aid, 230-280 parts vermiculite, 180-220 parts fiber, 50-100 parts cenospheres, 115-145 parts mineral fiber, 1-6 parts thickener, and 7-12 parts foaming agent.

[0007] In one or more embodiments of the present invention, the multifunctional adjuvant includes a stabilizer, an antioxidant, and a catalyst;

[0008] The composition includes 0.3 parts stabilizer, 1.2 parts antioxidant, and 0.5 parts catalyst.

[0009] In one or more embodiments of the present invention, the emulsion is an acrylic emulsion.

[0010] A manufacturing process for a sound-absorbing coating includes the following steps:

[0011] S1. First, heat the water to 60-80℃, then mix the water and preservative in an equal proportion in a container and stir well.

[0012] S2. Add vermiculite to the mixture in step S1 and continue stirring until the vermiculite is completely dissolved;

[0013] S3. Add the multifunctional additive, emulsion and film-forming agent to the mixture in step S2 in sequence, and stir.

[0014] S4. Gradually add vermiculite, fleece fiber, cenospheres and mineral fiber to the mixture and stir them in sequence;

[0015] S5. Finally, add thickener and foaming agent, stir well, and make sound-absorbing coating.

[0016] In one or more embodiments of the present invention, in steps S1-S5, the ambient temperature of the manufacturing process is 20-30°C.

[0017] In one or more embodiments of the present invention, in steps S1-S3, the stirring speed is 300-500 r / min and the stirring time is 10-20 min; in steps S4-S5, the stirring speed is 1300-1800 r / min and the stirring time is 15-30 min.

[0018] In one or more embodiments of the present invention, in step S4, vermiculite is crushed, separated from other impurities by mineral processing, crushed a second time, and then graded. The graded vermiculite is dried to remove moisture and obtain vermiculite particles.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In this invention, the added vermiculite, fiber, and mineral fiber have excellent sound absorption properties, effectively absorbing sound waves in the air and reducing noise transmission. The addition of emulsion and film-forming aids enables the sound-absorbing coating to form a robust film structure, improving its durability and stability. The addition of thickeners can adjust the viscosity of the sound-absorbing coating, making it easier to apply and coat. The addition of foaming agents can increase the porosity of the material, thereby achieving heat insulation, sound insulation, and soundproofing. By using the sound-absorbing formula in this invention, the sound-absorbing coating has an externally closed-pore cotton-like structure, thereby reducing external sound and possessing high-strength fire resistance, sound insulation, and heat insulation properties.

[0021] The sound-absorbing coating prepared by this invention is formed by countless fibers or open-pore sound-absorbing materials interwoven and mixed together to form numerous tiny gaps and channels composed of countless interconnected micropores. This allows the surface of the sound-absorbing coating to provide sufficient channels for sound to enter. The sound is absorbed through countless tiny black holes, and once the sound enters, it is not easy to escape. The sound travels around in the channels, colliding and rubbing from side to side. Through the air viscosity resistance and the thermal conductivity inside the coating, a considerable portion of the sound energy is converted into heat energy in this process, which is gradually consumed over time, thus playing a role in sound absorption. It has high flame retardancy, sound absorption and insulation, and heat insulation properties. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the process of the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1

[0025] Please see Figure 1 The present invention provides a technical solution:

[0026] A sound-absorbing coating is composed of the following raw materials in parts by weight: 250 parts water, 2 parts preservative, 1.5 parts cellulose, 2 parts multifunctional additive, 80 parts emulsion, 3 parts film-forming aid, 250 parts vermiculite, 200 parts fiber, 80 parts cenospheres, 120 parts mineral fiber, 2 parts thickener, and 10 parts foaming agent.

[0027] Specifically, multifunctional additives include stabilizers, antioxidants, and catalysts;

[0028] The composition includes 0.3 parts stabilizer, 1.2 parts antioxidant, and 0.5 parts catalyst.

[0029] Specifically, the emulsion is an acrylic emulsion.

[0030] A manufacturing process for a sound-absorbing coating includes the following steps:

[0031] S1. First, heat the water to 60°C, then mix the water and preservative in an equal ratio in a container and stir well.

[0032] S2. Add vermiculite to the mixture in step S1 and continue stirring until the vermiculite is completely dissolved;

[0033] S3. Add the multifunctional additive, emulsion and film-forming agent to the mixture in step S2 in sequence, and stir.

[0034] S4. Gradually add vermiculite, fleece fiber, cenospheres and mineral fiber to the mixture and stir them in sequence;

[0035] S5. Finally, add thickener and foaming agent, stir well, and make sound-absorbing coating.

[0036] Specifically, in steps S1-S5, the ambient temperature of the manufacturing process is 20-30℃.

[0037] Specifically, in steps S1-S3, the stirring speed is 300-500 r / min and the stirring time is 10-20 min; in steps S4-S5, the stirring speed is 1300 r / min and the stirring time is 15-30 min.

[0038] Specifically, in step S4, vermiculite is crushed, separated from other impurities by mineral processing, crushed a second time, and then graded. The graded vermiculite is then dried to remove moisture, resulting in vermiculite particles.

[0039] Example 2

[0040] A sound-absorbing coating is composed of the following raw materials in parts by weight: 200 parts water, 2 parts preservative, 1 part cellulose, 1 part multifunctional additive, 50 parts emulsion, 1 part film-forming aid, 230 parts vermiculite, 180 parts fiber, 50 parts cenosphere, 115 parts mineral fiber, 1 part thickener, and 7 parts foaming agent.

[0041] Specifically, multifunctional additives include stabilizers, antioxidants, and catalysts;

[0042] The composition includes 0.3 parts stabilizer, 1.2 parts antioxidant, and 0.5 parts catalyst.

[0043] Specifically, the emulsion is an acrylic emulsion.

[0044] A manufacturing process for a sound-absorbing coating includes the following steps:

[0045] S1. First, heat the water to 68°C, then mix the water and preservative in an equal ratio in a container and stir well.

[0046] S2. Add vermiculite to the mixture in step S1 and continue stirring until the vermiculite is completely dissolved;

[0047] S3. Add the multifunctional additive, emulsion and film-forming agent to the mixture in step S2 in sequence, and stir.

[0048] S4. Gradually add vermiculite, fleece fiber, cenospheres and mineral fiber to the mixture and stir them in sequence;

[0049] S5. Finally, add thickener and foaming agent, stir well, and make sound-absorbing coating.

[0050] Specifically, in steps S1-S5, the ambient temperature of the manufacturing process is 20-30℃.

[0051] Specifically, in steps S1-S3, the stirring speed is 450 r / min and the stirring time is 15 min; in steps S4-S5, the stirring speed is 1600 r / min and the stirring time is 20 min.

[0052] Specifically, in step S4, vermiculite is crushed, separated from other impurities by mineral processing, crushed a second time, and then graded. The graded vermiculite is then dried to remove moisture, resulting in vermiculite particles.

[0053] Example 3

[0054] A sound-absorbing coating is composed of the following raw materials in parts by weight: 280 parts water, 10 parts preservative, 4.5 parts cellulose, 5 parts multifunctional additive, 90 parts emulsion, 7 parts film-forming aid, 280 parts vermiculite, 220 parts fiber, 100 parts cenosphere, 145 parts mineral fiber, 6 parts thickener, and 12 parts foaming agent.

[0055] Specifically, multifunctional additives include stabilizers, antioxidants, and catalysts;

[0056] The composition includes 0.3 parts stabilizer, 1.2 parts antioxidant, and 0.5 parts catalyst.

[0057] Specifically, the emulsion is an acrylic emulsion.

[0058] A manufacturing process for a sound-absorbing coating includes the following steps:

[0059] S1. First, heat the water to 80°C, then mix the water and preservative in an equal ratio in a container and stir well.

[0060] S2. Add vermiculite to the mixture in step S1 and continue stirring until the vermiculite is completely dissolved;

[0061] S3. Add the multifunctional additive, emulsion and film-forming agent to the mixture in step S2 in sequence, and stir.

[0062] S4. Gradually add vermiculite, fleece fiber, cenospheres and mineral fiber to the mixture and stir them in sequence;

[0063] S5. Finally, add thickener and foaming agent, stir well, and make sound-absorbing coating.

[0064] Specifically, in steps S1-S5, the ambient temperature of the manufacturing process is 30°C.

[0065] Specifically, in steps S1-S3, the stirring speed is 500 r / min and the stirring time is 20 min; in steps S4-S5, the stirring speed is 1800 r / min and the stirring time is 30 min.

[0066] Specifically, in step S4, vermiculite is crushed, separated from other impurities by mineral processing, crushed a second time, and then graded. The graded vermiculite is then dried to remove moisture, resulting in vermiculite particles.

[0067] Experimental Example

[0068] Experiments were conducted in sequence for Example 1, Example 2, and Example 3 for comparison.

[0069] The steps are as follows: First, heat the water, mix the water and preservative in equal proportions in a container, stir well, add vermiculite to the mixture, continue stirring until the vermiculite is completely dissolved, add the multifunctional additive, emulsion, and film-forming agent to the mixture in sequence, and stir, gradually add vermiculite particles, fiber, cenospheres and mineral fibers to the mixture, and stir in sequence, and finally add thickener and foaming agent, stir well to make sound-absorbing coating.

[0070] Performance of different weight parts tested in the three embodiments

[0071] Three examples and commercially available sound-absorbing coatings were sequentially applied to the same wooden board, ensuring that the coating thickness was the same. Acoustic performance tests were conducted on the wooden boards coated with the sound-absorbing coatings using acoustic testing instruments, including airborne sound insulation, sound absorption coefficient by standing wave tube method, and sound absorption coefficient by reverberation chamber method. The three test results were compared and analyzed with commonly available sound-absorbing coatings to evaluate the performance of the sound-absorbing coatings.

[0072] The sound absorption effect analysis results are as follows (according to sound absorption volume): Example 2 < Example 1 < Example 3 < Commercially available materials

[0073] Application Experiment

[0074] Select a noisy experimental site, apply the sound-absorbing coatings prepared in Examples 1, 2 and 3 to the walls, place the noise detection instrument in front of the walls, and conduct noise detection.

[0075] The noise test results showed that walls coated with sound-absorbing paint were less than those without.

[0076] As can be seen from the above, the sound-absorbing coating prepared by the present invention has higher fire resistance, sound insulation, and heat insulation properties compared with existing sound-absorbing coatings.

[0077] The added vermiculite, fiber, and mineral fiber have excellent sound absorption properties, effectively absorbing sound waves in the air and reducing noise transmission. The addition of emulsion and film-forming aids enables the sound-absorbing coating to form a robust film structure, improving its durability and stability. The addition of thickeners can adjust the viscosity of the sound-absorbing coating, making it easier to apply and coat. The addition of foaming agents can increase the porosity of the material, allowing air to mix together and form countless tiny gaps. The channels composed of countless interconnected micropores provide sufficient channels for sound to enter through the surface of the sound-absorbing coating. The sound is absorbed through these countless tiny black holes, and once it enters, it is not easy for it to escape. The sound travels around in the channels, colliding and rubbing against each other. Through the air viscosity resistance and the thermal conductivity inside the coating, a considerable portion of the sound energy is converted into heat energy in this process, which is gradually consumed over time, thus achieving the effect of sound absorption. It has high flame retardancy, sound absorption and insulation, and heat insulation properties.

[0078] All parts not described in this invention are the same as or can be implemented using existing technology. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sound-absorbing coating, characterized in that, It is composed of the following raw materials in parts by weight: water 200-280 parts, preservative 2-10 parts, cellulose 1-4.5 parts, multifunctional additive 1-5 parts, emulsion 50-90 parts, film-forming aid 1-7 parts, vermiculite 230-280 parts, fiber 180-220 parts, cenosphere 50-100 parts, mineral fiber 115-145 parts, thickener 1-6 parts, and foaming agent 7-12 parts.

2. The sound-absorbing coating according to claim 1, characterized in that: Multifunctional additives include stabilizers, antioxidants, and catalysts; The composition includes 0.3 parts stabilizer, 1.2 parts antioxidant, and 0.5 parts catalyst.

3. The sound-absorbing coating according to claim 1, characterized in that: The emulsion is an acrylic emulsion.

4. A manufacturing process for a sound-absorbing coating, characterized in that: Includes the following steps: S1. First, heat the water to 60-80℃, then mix the water and preservative in an equal proportion in a container and stir well. S2. Add vermiculite to the mixture in step S1 and continue stirring until the vermiculite is completely dissolved. S3. Add the multifunctional additive, emulsion and film-forming agent to the mixture in step S2 in sequence, and stir. S4. Gradually add vermiculite, fleece fiber, cenospheres and mineral fiber to the mixture and stir them in sequence; S5. Finally, add thickener and foaming agent, stir well, and make sound-absorbing coating.

5. The manufacturing process of the sound-absorbing coating according to claim 4, characterized in that: In steps S1-S5, the ambient temperature of the manufacturing process is 20-30℃.

6. The manufacturing process of the sound-absorbing coating according to claim 4, characterized in that: In steps S1-S3, the stirring speed is 300-500 r / min and the stirring time is 10-20 min. In steps S4-S5, the stirring speed is 1300-1800 r / min and the stirring time is 15-30 min.

7. The manufacturing process of the sound-absorbing coating according to claim 4, characterized in that: In step S4, vermiculite is crushed, separated from other impurities by mineral processing, crushed a second time, and then graded. The graded vermiculite is dried to remove moisture and obtain vermiculite particles.

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