A sound-absorbing and heat-insulating coating with a velvet touch, and a preparation method and application thereof

Abstract

The application provides a velvet touch sound-absorbing and heat-insulating coating as well as a preparation method and application thereof. The preparation raw material of the velvet touch sound-absorbing and heat-insulating coating comprises A component and B component. The A component comprises the following components: 10-20 parts of deionized water, 1.8-3.5 parts of a first additive, 20-30 parts of organic silicon hollow microspheres with a particle size of 1.5-2.5 microns, 20-30 parts of organic silicon hollow microspheres with a particle size of 3-5 microns, and 20-30 parts of organic silicon modified aerogel. The B component comprises the following components: 10-20 parts of deionized water, 25.3-35.6 parts of a second additive, 30-50 parts of a dispersion liquid prepared from the A component, 10-15 parts of silica sol, and 20-30 parts of a water-based polyurethane dispersion. The sound-absorbing coating provided by the application has a velvet touch, is safe and environmentally friendly, does not have specific requirements for a base layer, has a heat-insulating performance, and has excellent decorative performance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coatings, and relates to a velvet touch sound-absorbing and heat-insulating coating as well as a preparation method and application thereof. BACKGROUND

[0002] Studies have shown that the harm of noise to the human body is multifaceted. Light, can cause hearing impairment, inability to concentrate, insomnia, and neurasthenia; severe, can cause high blood pressure, heart dysfunction, and can induce other diseases. In addition, noise in the workplace can also interfere with language communication, affect work efficiency, and even cause accidents.

[0003] With the rapid development of China's economy and the rapid improvement of people's living standards, the problem of sound insulation, noise reduction and thermal insulation of living environment is increasingly concerned. More and more sound insulation, noise reduction, thermal insulation and other functional materials are explored, developed and put into the market. In order to reduce the influence of noise on civil buildings and ensure a good sound environment in civil buildings, the state has increased the sound insulation and noise reduction design requirements in the design of residential buildings, school buildings, hospital buildings, hotel buildings, office buildings and commercial buildings. Due to the simple and convenient production and construction of sound-absorbing coating, rich color and good decoration performance, the application of sound-absorbing coating in environments requiring sound absorption and noise reduction is becoming more and more widespread. In addition, compared with sound-absorbing cotton of similar performance, sound-absorbing coating is more convenient and flexible to construct, is not limited by site, and to some extent reduces material loss and construction cost. Moreover, sound-absorbing coating is an environmentally friendly material that does not produce secondary pollution to the environment during construction and operation, unlike sprayed inorganic fiber cotton. In recent years, with the improvement and development of technology, sound-absorbing coating has gradually replaced other similar functional products.

[0004] CN116285524A discloses a water-resistant sound insulation coating and application. The coating includes liquid material and powder material; the raw materials of the liquid material include activated polymer emulsion, and optionally, additives and water; the activated polymer emulsion contains amino and epoxy groups; the raw materials of the powder material include fillers, which can form chemical bonding with the activated polymer emulsion. The invention forms a stable three-dimensional network structure through addition ring-opening reaction to make the polymer emulsion have amino and epoxy groups, and the powder material forms chemical bonding, which can significantly reduce the transmitted sound wave energy and play a sound insulation role. However, the coating of the invention needs to be coated with a relatively thick thickness to have a good sound insulation effect, and has a high requirement for the base layer.

[0005] Therefore, it is desirable in the art to develop a coating that not only has sound absorption and heat insulation effects, but also has good sound absorption effect with a relatively thin coating thickness, and has no specific requirements for the base layer and good decoration effect. SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the present application is to provide a velvet touch sound-absorbing and heat-insulating coating as well as a preparation method and application thereof. The sound-absorbing coating provided by the present application has a velvet touch, is safe and environmentally friendly, does not have specific requirements for the base layer, has heat-insulating performance, and has excellent decorative performance. The sound-absorbing coating provided by the present application has very good sound-absorbing effect when the coating thickness is 80-100 mu.

[0007] To achieve this purpose, the present application adopts the following technical solutions:

[0008] In the first aspect, the present application provides a velvet touch sound-absorbing and heat-insulating coating, and the preparation raw materials of the velvet touch sound-absorbing and heat-insulating coating include component A and component B.

[0009] The component A includes the following components in terms of weight fraction:

[0010]

[0011] The component B includes the following components in terms of weight fraction:

[0012]

[0013] The coating provided by the present application is prepared by screening and synergistic compounding of specific components, especially the introduction of organic silicon hollow microspheres, organic silicon modified aerogel, silica sol and water-based polyurethane dispersion with different particle sizes. The coating has very good sound-absorbing effect when the coating thickness is 80-100 mu, solving the problem of thick coating of the current sound-absorbing coating, especially the poor decorative effect. The coating provided by the present application has a velvet touch, solving the problem of poor finishing effect of the existing sound-absorbing coating. In addition, the coating provided by the present application has heat-insulating and heat-preserving performance, which can expand the application field of sound-absorbing coating and solve the problem of single function of the existing sound-absorbing coating.

[0014] In the present application, the introduction of organic silicon hollow microspheres and the matching of different particle sizes can inhibit sound diffusion to reduce mixed sound and achieve sound-absorbing and noise-reducing functions. The organic silicon hollow microspheres will be slightly raised in the coating layer, showing a velvet touch. The introduction of organic silicon modified aerogel can make the coating have heat-insulating and heat-preserving performance, and the microporous structure of the organic silicon modified aerogel can inhibit the diffusion of sound, thereby achieving the sound-absorbing function. The pre-dispersion of the organic silicon modified aerogel and the organic silicon hollow microspheres can improve the storage stability of the product.

[0015] In the present application, the introduction of silica sol can obtain a coating layer with excellent adhesion and weather resistance when matched with the water-based polyurethane dispersion. In addition, the silica sol has good compatibility with the organic silicon modified aerogel and the organic silicon hollow microspheres, thereby obtaining a stable coating product.

[0016] Conventional sound-absorbing coatings require a minimum coating thickness of 3mm. This invention introduces hollow silicone microspheres and porous materials, achieving a noise reduction coefficient of 0.5 when the film thickness is 80-100μm. This improves the ease of construction, reduces material waste, and saves space when applied in limited spaces.

[0017] In this invention, component A includes deionized water in amounts of 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 parts by weight.

[0018] In this invention, component A includes, by weight, the amount of the first auxiliary agent, which can be 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, 3 parts, 3.2 parts, 3.4 parts, 3.5 parts, etc.

[0019] In this invention, the A component comprises organosilicon hollow microspheres with a particle size of 1.5 to 2.5 μm (e.g., 1.5 μm, 1.6 μm, 1.7 μm, 1.8 μm, 1.9 μm, 2 μm, 2.1 μm, 2.2 μm, 2.3 μm, 2.4 μm, 2.5 μm, etc.) in parts by weight, which can be 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, etc.

[0020] In this invention, the amount of organosilicon hollow microspheres with a particle size of 3-5 μm (e.g., 3 μm, 3.2 μm, 3.4 μm, 3.6 μm, 3.8 μm, 4 μm, 4.2 μm, 4.4 μm, 4.6 μm, 4.8 μm, 5 μm, etc.) in component A, by weight, can be 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, etc.

[0021] In this invention, component A includes, by weight, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 parts of organosilicon-modified aerogel.

[0022] In this invention, the B component includes deionized water in parts by weight, which can be 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 parts, etc.

[0023] In this invention, the B component includes, by weight, the amount of the second auxiliary agent, which can be 25.3 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 35.6 parts, etc.

[0024] In this invention, the B component includes, by weight, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 ​​parts, 50 parts, etc. of the dispersion prepared from the A component.

[0025] In this invention, component B includes silica sol in parts by weight, which can be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, etc.

[0026] In this invention, the B component includes an amount of waterborne polyurethane dispersion of 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 parts by weight.

[0027] In this invention, the organosilicon hollow microspheres, organosilicon modified aerogels, silica sols, and aqueous polyurethane dispersions are all commercially available products that can be purchased through commercial channels.

[0028] Preferably, the first additive includes any one or a combination of at least two of the following: thickener, dispersant, and wetting agent.

[0029] Preferably, the first additive comprises the following components in parts by weight: 0.2 to 0.5 parts of thickener (e.g., 0.2, 0.3, 0.4, 0.5, etc.), 0.8 to 1.5 parts of dispersant (e.g., 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, etc.), and 0.8 to 1.5 parts of wetting agent (e.g., 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, etc.).

[0030] Preferably, the second additive includes any one or a combination of at least two of the following: thickener, dispersant, wetting agent, bactericide, pigment, filler, and film-forming aid.

[0031] Preferably, the second additive comprises the following components in parts by weight: 0.4 to 1 part thickener (e.g., 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 part, etc.), 0.3 to 0.5 parts dispersant (e.g., 0.3, 0.4, 0.5 parts, etc.), 0.3 to 0.5 parts wetting agent (e.g., 0.3, 0.4, 0.5 parts, etc.), 0.3 to 0.6 parts bactericide (e.g., 0.3, 0.4, 0.5, 0.6 parts, etc.), 15 to 20 parts pigment (e.g., 15, 16, 17, 18, 19, 20 parts, etc.), 8 to 11 parts filler (e.g., 8, 9, 10, 11 parts, etc.), and 1 to 2 parts film-forming aid (e.g., 1, 1.2, 1.4, 1.6, 1.8, 2 parts, etc.).

[0032] Preferably, the thickeners in the first and second additives each independently comprise any one or a combination of at least two of bentonite, attapulgite, hydroxyethyl cellulose, and hydroxypropyl methylcellulose.

[0033] Preferably, the dispersant in the first and second additives each independently comprises any one or a combination of at least two of acrylate polymeric dispersants, polyurethane or polyester polymeric dispersants.

[0034] Preferably, the wetting agent in the first and second additives each independently comprises any one or a combination of at least two of polyoxyethylene alkylphenol ether, polyoxyethylene fatty alcohol ether, and polyoxyethylene polyoxypropylene block copolymer.

[0035] Preferably, the bactericide includes isothiazolinone bactericides and / or benzisothiazolinone bactericides.

[0036] Preferably, the pigment includes titanium dioxide.

[0037] Preferably, the filler comprises nano-diatomaceous earth and / or talc.

[0038] Preferably, the film-forming aid comprises dodecyl alcohol ester and / or ethylene glycol monobutyl ether.

[0039] As a preferred embodiment of the present invention, component A comprises the following components in parts by weight:

[0040]

[0041] Component B comprises the following components in parts by weight:

[0042]

[0043]

[0044] In a second aspect, the present invention provides a method for preparing a plush-feel sound-absorbing and heat-insulating coating as described in the first aspect, the method comprising the following steps:

[0045] (1) Mix the specific components in component A of the formula to obtain a dispersion;

[0046] (2) Mix and disperse the deionized water, the second additive, the dispersion obtained in step (1), the silica sol, and the waterborne polyurethane dispersion in component B of the formula to obtain the plush-feel sound-absorbing and heat-insulating coating.

[0047] Preferably, the dispersion step (2) is followed by a filtration step.

[0048] Thirdly, the present invention provides an application of the plush-feel sound-absorbing and heat-insulating coating as described in the first aspect in civil buildings.

[0049] Compared with the prior art, the present invention has at least the following beneficial effects:

[0050] The coating provided by this invention, through the screening and synergistic compounding of specific components, especially the introduction of organosilicon hollow microspheres of different particle sizes, organosilicon modified aerogels, silica sols, and waterborne polyurethane dispersions, enables the coating to have excellent sound absorption effect when the coating thickness is 80-100μm, solving the problem of current sound-absorbing coatings having excessively thick coatings, especially with poor decorative effects. Furthermore, the coating provided by this invention has a velvety feel, solving the problem of poor surface finish of existing sound-absorbing coatings. In addition, the coating provided by this invention has heat insulation properties, which can expand the application field of sound-absorbing coatings and solve the problem of the single function of existing sound-absorbing coatings. Detailed Implementation

[0051] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0052] Unless otherwise specified, the raw material information used in the embodiments and comparative examples of this invention is as follows:

[0053] Bentonite: BENTONE 38 from ELEMENTIS;

[0054] Dispersant: BYK190;

[0055] Wetting agent: Organosilicon wetting agent, BYK333;

[0056] Organosilicon hollow microspheres: 2μm particle size, FE212;

[0057] Organosilicon hollow microspheres: 3μm particle size, FE213;

[0058] Organosilicon modified aerogel: ENOVA AEROGEL IC3110, manufacturer: CABOT;

[0059] Bactericide: Dow LXE;

[0060] Titanium dioxide: DuPont rutile R706;

[0061] Nano-diatomite: 10-15μm, JSY660;

[0062] Talc: HY-TA;

[0063] Silica sol: Ludox HS-30;

[0064] Aqueous polyurethane dispersion: SYNTEGRATMYS-3000;

[0065] Film-forming aid: Dodecyl alcohol ester;

[0066] Polyurethane thickener: BYK410.

[0067] Example 1

[0068] This embodiment provides a plush-feel sound-absorbing and heat-insulating coating. The raw materials for preparing the plush-feel sound-absorbing and heat-insulating coating include component A and component B. The specific components and amounts (parts by weight) of component A and component B are shown in Table 1.

[0069] The preparation method includes the following steps:

[0070] (1) According to the formula in Table 1, add the materials 1-7 of component A in sequence, disperse them evenly to obtain the dispersion prepared by component A, and set aside.

[0071] (2) According to the formula in Table 1, add the materials 1-8 of component B in sequence, disperse at 1500 rpm for 25 min until the fineness is below 30 μm; then add the dispersion prepared by component A and the remaining materials 10-13 of component B, disperse at 800 rpm for 12 min, filter, fill, and obtain the coating.

[0072] It should be noted that the preparation method provided by the present invention is not limited to the preparation method of Example 1. Alternatively, the materials in component A can be directly mixed and dispersed to obtain a dispersion, and then directly mixed and dispersed with other components of component B to obtain the coating.

[0073] Examples 2-7

[0074] The only difference between Examples 2-7 and Example 1 is that the specific components and / or amounts of the raw materials used in the preparation are different, as shown in Table 1.

[0075] Comparative Examples 1-6

[0076] The only difference between Comparative Examples 1-6 and Example 1 is that the specific components and / or amounts of the raw materials used in preparation are different, as shown in Table 2.

[0077] Table 1

[0078]

[0079]

[0080] Table 2

[0081]

[0082]

[0083] Comparative Example 7

[0084] The only difference between this comparative example and Example 3 is that the 29 parts of organosilicon hollow microspheres (2μm) in component A are replaced with 29 parts of hollow glass microspheres HN60 (2μm).

[0085] Comparative Example 8

[0086] The only difference between this comparative example and Example 3 is that 20 parts of organosilicon hollow microspheres (3μm) in component A are replaced with 20 parts of hollow glass microspheres HN46 (3μm).

[0087] The coatings provided in the examples and comparative examples were subjected to performance tests. The test methods and performance test results are shown in Tables 3 and 4.

[0088] Table 3

[0089]

[0090]

[0091] Table 4

[0092]

[0093]

[0094] It should be noted that (1) the test standards or methods of the relevant tests in Table 4 are the same as those in Table 3; (2) the noise reduction coefficient and coating appearance in Table 3 and Table 4 are obtained under the condition that the coating thickness is 80μm.

[0095] As can be seen from Table 3, the coatings provided in the embodiments of the present invention have good sound absorption effect (noise reduction coefficient: 0.54~0.58) even when the coating thickness is relatively thin (80μm), and have good workability, uniform color of the coating film, good thermal insulation performance (thermal conductivity: 0.05~0.07W / m·K), and the adhesion, hardness, water resistance, acid and alkali resistance, and scrub resistance all meet the index requirements.

[0096] As can be seen from Tables 3 and 4, compared with Example 3, the sound absorption and heat insulation effects of the coatings provided in Comparative Examples 1-2 are significantly worse and do not meet the requirements; the sound absorption and heat insulation effects of the coatings provided in Comparative Example 3 are slightly worse and the heat insulation performance does not meet the requirements; the heat insulation effect of the coatings provided in Comparative Example 4 is worse and the heat insulation performance does not meet the requirements.

[0097] Compared with Example 3, the coating provided in Comparative Example 5 showed a significant decrease in adhesion and hardness, and its water resistance, acid and alkali resistance, and scrub resistance all failed to meet the required standards; the coating provided in Comparative Example 6 showed a decrease in adhesion and its acid and alkali resistance failed to meet the required standards.

[0098] Compared with Example 3, the sound absorption and heat insulation effects of the coatings provided in Comparative Examples 7-8 were significantly worse, failing to meet the requirements, and the adhesion was reduced.

[0099] The applicant declares that this invention illustrates the plush-feel sound-absorbing and heat-insulating coating, its preparation method, and its application through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of the raw materials in the product, additions of auxiliary components, and selection of specific methods all fall within the protection and disclosure scope of this invention.

Claims

1. A plush-feel sound-absorbing and heat-insulating coating, characterized in that, The raw materials for preparing the plush-feel sound-absorbing and heat-insulating coating include component B; Component B comprises the following components in parts by weight: Component A comprises the following components in parts by weight:

2. The plush-feel sound-absorbing and heat-insulating coating according to claim 1, characterized in that, The first additive includes any one or a combination of at least two of the following: thickener, dispersant, and wetting agent.

3. The plush-feel sound-absorbing and heat-insulating coating according to claim 1, characterized in that, The first additive comprises the following components in parts by weight: 0.2 to 0.5 parts thickener, 0.8 to 1.5 parts dispersant, and 0.8 to 1.5 parts wetting agent.

4. The plush-feel sound-absorbing and heat-insulating coating according to claim 1, characterized in that, The second auxiliary agent includes any one or a combination of at least two of the following: thickener, dispersant, wetting agent, bactericide, pigment, filler, and film-forming aid.

5. The plush-feel sound-absorbing and heat-insulating coating according to claim 1, characterized in that, The second additive comprises the following components in parts by weight: 0.4 to 1 part thickener, 0.3 to 0.5 part dispersant, 0.3 to 0.5 part wetting agent, 0.3 to 0.6 part bactericide, 15 to 20 parts pigment, 8 to 11 parts filler, and 1 to 2 parts film-forming aid.

6. The plush-feel sound-absorbing and heat-insulating coating according to claim 2 or 4, characterized in that, The thickeners in the first and second additives each independently include any one or a combination of at least two of bentonite, attapulgite, hydroxyethyl cellulose, and hydroxypropyl methylcellulose.

7. The plush-feel sound-absorbing and heat-insulating coating according to claim 2 or 4, characterized in that, The dispersants in the first and second additives each independently include any one or a combination of at least two of acrylate polymeric dispersants, polyurethane or polyester polymeric dispersants.

8. The plush-feel sound-absorbing and heat-insulating coating according to claim 2 or 4, characterized in that, The wetting agents in the first and second additives each independently include any one or a combination of at least two of polyoxyethylene alkylphenol ethers, polyoxyethylene fatty alcohol ethers, and polyoxyethylene polyoxypropylene block copolymers.

9. The plush-feel sound-absorbing and heat-insulating coating according to claim 4, characterized in that, The bactericides include isothiazolinone bactericides and / or benzisothiazolinone bactericides.

10. The plush-feel sound-absorbing and heat-insulating coating according to claim 4, characterized in that, The pigment includes titanium dioxide.

11. The plush-feel sound-absorbing and heat-insulating coating according to claim 4, characterized in that, The filler includes nano-diatomite and / or talc.

12. The plush-feel sound-absorbing and heat-insulating coating according to claim 4, characterized in that, The film-forming aids include dodecyl alcohol ester and / or ethylene glycol monobutyl ether.

13. The plush-feel sound-absorbing and heat-insulating coating according to claim 1, characterized in that, Component B comprises the following components in parts by weight: Component A comprises the following components in parts by weight:

14. A method for preparing the plush-feel sound-absorbing and heat-insulating coating as described in claim 1, characterized in that, The preparation method includes the following steps: (1) Mix the specific components in component A of the formula to obtain a dispersion; (2) Mix and disperse the deionized water, the second additive, the dispersion obtained in step (1), the silica sol, and the waterborne polyurethane dispersion in component B of the formula to obtain the plush-feel sound-absorbing and heat-insulating coating.

15. The preparation method according to claim 14, characterized in that, Step (2) includes a filtration step after dispersion.

16. The application of the plush-feel sound-absorbing and heat-insulating coating as described in claim 1 in civil buildings.

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