Moisture-absorbing breathable anti-condensation coating as well as preparation method and application thereof

Abstract

The invention belongs to the field of comprehensive utilization of building materials and solid wastes, and particularly relates to a moisture-absorbing breathable anti-condensation coating as well as a preparation method and application thereof. The invention provides a moisture-absorbing breathable anti-condensation coating. The moisture-absorbing breathable anti-condensation coating comprises a film-forming base material, a powder material and a framework material, the powder material comprises jade tailings; the framework material comprises a porous mineral material. The coating provided by the invention has relatively good moisture absorption, air permeability and anti-condensation performance, and is long in service life.

Description

Technical Field

[0001] The present invention belongs to the fields of building materials and comprehensive utilization of solid waste, and particularly relates to a moisture-absorbing, breathable and anti-condensation coating, a preparation method thereof and an application thereof. Background Art

[0002] Due to its good decorative properties, long-lasting color, easy cleaning and maintenance, etc., latex paint has been widely used in the field of interior decoration; however, the latex paint coating has poor air permeability, and a dense airtight film will be formed on the wall surface, hindering the free flow of air, which will have a very serious impact on human health and the home environment. For example, indoor materials such as furniture and floors will deform and crack due to humidity changes; it will also cause the air humidity to be too high, and condensation may occur on the wall surface and then mildew appears, polluting the indoor air quality and affecting the health of the occupants.

[0003] At the same time, jade tailings are solid waste discarded during the processes of jade mining, processing and fine carving. In Xiuyan area with the largest reserves and mining volume, explosives are often used for blasting to mine jade, and the mineral utilization rate is less than 30%. 70% of the mineral resources are discarded as waste, resulting in huge waste of resources. How to convert it into latex paint poses a great challenge. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the waste of jade tailings resources in the prior art, how to apply it to latex paint, and solve the defects such as poor air permeability of the paint, so as to provide a moisture-absorbing, breathable and anti-condensation coating, a preparation method thereof and an application thereof.

[0005] To this end, the present invention provides the following technical solutions.

[0006] The present invention provides a moisture-absorbing, breathable and anti-condensation coating, which comprises a film-forming base material, a powder material and a skeleton material; the powder material comprises jade tailings; the skeleton material comprises a porous mineral material.

[0007] Jade tailings can be obtained through commercial purchase. The compositions in different regions will vary slightly, but the main compositions are the same. The composition here is for illustrative purposes. The main components include SiO2, MgO, CaO, Fe2O3, etc. Optionally, it can also include TiO2, Al2O3, MnO, Na2O, K2O, Co3O4, NiO, etc. See Table 1 for details;

[0008] Table 1 Main components and mass contents of jade tailings in different regions of China

[0009]

[0010] Porous mineral materials refer to mineral materials that naturally have micron pores or nano pores or have a porous structure formed through treatment. The pore diameter of the nano pores in the porous mineral materials is 2 - 50 nm;

[0011] In an alternative embodiment, the mass ratio of the jade tailings in the powder material to the porous mineral materials in the framework material is (5 - 20):(5 - 20);

[0012] In an alternative embodiment, the particle size of the jade tailings is 300 - 1000 mesh;

[0013] In an alternative embodiment, the porous mineral materials include nano pores and / or micron pores;

[0014] In an alternative embodiment, the porous mineral materials include at least one of zeolite, sepiolite, montmorillonite, and diatomite.

[0015] In an alternative embodiment, the framework material further includes jade tailings;

[0016] Preferably, the mass ratio of the jade tailings in the framework material to the porous mineral materials is (0 - 10):(5 - 20). It should be noted here that the content of jade tailings in the framework material can be 0 or not 0.

[0017] In an alternative embodiment, the powder material further includes a filler;

[0018] Preferably, the mass ratio of the jade tailings and the filler in the powder material is (5 - 20):(5 - 20);

[0019] Preferably, the filler includes at least one of titanium dioxide, shell powder, light calcium carbonate, heavy calcium carbonate, barite powder, talc powder, silica, white carbon black, mica powder, wollastonite, bentonite, and kaolin.

[0020] In an alternative embodiment, the film-forming base material includes an emulsion and an auxiliary agent;

[0021] Preferably, the mass ratio of the emulsion to the auxiliary agent is (15 - 30):(0.2 - 4);

[0022] Preferably, the auxiliary agent includes a suspending agent and / or a modifier;

[0023] Preferably, the mass ratio of the emulsion, the suspending agent, and the modifier is (15 - 30):(0.2 - 2):(1 - 2).

[0024] In an alternative embodiment, the emulsion comprises at least one of styrene-acrylic emulsion, pure acrylic emulsion, VAE emulsion and polyurethane emulsion; the present invention does not limit the solid content of the emulsion, and it can be selected according to the conventional in the art;

[0025] In an alternative embodiment, the suspending agent comprises at least one of bentonite and attapulgite;

[0026] In an alternative embodiment, the modifier comprises at least one of a dispersant, an antifoaming agent and a stabilizer;

[0027] The dispersant, antifoaming agent and stabilizer can be conventional dispersants, antifoaming agents and stabilizers in the art, and the present invention does not make specific limitations.

[0028] In an alternative embodiment, the film-forming binder further comprises a solvent.

[0029] The type and addition amount of the solvent are conventional types and dosages in the art, and the present invention does not make specific limitations.

[0030] In an alternative embodiment, the mass ratio of the film-forming binder, the powder material and the skeleton material is (0.2 - 64):(5 - 60):(5 - 30).

[0031] The present invention also provides a method for preparing a moisture-absorbing, breathable and anti-condensation coating, which comprises mixing the film-forming binder, the powder material and the skeleton material uniformly to obtain the moisture-absorbing, breathable and anti-condensation coating; the powder material comprises jade tailings; the skeleton material comprises a porous mineral material.

[0032] In an alternative embodiment, the powder material and the skeleton material are mixed uniformly, and then the film-forming binder is added and mixed uniformly to obtain the moisture-absorbing, breathable and anti-condensation coating.

[0033] The present invention also provides an application of the above moisture-absorbing, breathable and anti-condensation coating or the moisture-absorbing, breathable and anti-condensation coating prepared by the above preparation method in buildings, bridges, tunnels, refrigeration equipment, transportation vehicles and the protection of ancient buildings.

[0034] The technical solution of the present invention has the following advantages:

[0035] 1. The moisture-absorbing, breathable and anti-condensation coating provided by the present invention comprises a film-forming binder, a powder material and a framework material; the powder material includes jade tailings; the framework material includes porous mineral materials. The coating provided by the present invention has good moisture-absorbing, breathable and anti-condensation properties and a long service life. Among them, the jade tailings and the porous mineral materials form a micro-framework structure, enabling water vapor to permeate through, endowing the wall with certain breathability, thus avoiding the imbalance of vapor pressure inside and outside the wall caused by poor breathability when the environmental temperature and humidity change, resulting in phenomena such as wall condensation, coating blistering, cracking and mildew, which cause harm to the home environment and human health; the minerals and trace elements in the jade tailings can resist ultraviolet rays, etc., extending the service life of the moisture-absorbing, breathable and anti-condensation coating; the natural color and texture of the jade tailings endow the moisture-absorbing, breathable and anti-condensation coating with a unique aesthetic feeling after being applied to the wall, improving the added value and market competitiveness of the product. By using jade tailings, the present invention consumes a large amount of tailings and reasonably realizes the comprehensive utilization of solid waste resources.

[0036] 2. For the moisture-absorbing, breathable and anti-condensation coating provided by the present invention, the addition amounts of raw materials such as fillers and emulsions are optimized, which can further improve the moisture-absorbing, breathable and anti-condensation properties of the coating, making the formed coating less likely to be damaged, condensed, mildewed, etc.; emulsions and suspending agents can improve the film-forming property, adhesion property, etc. of the coating; titanium dioxide can further improve the anti-ultraviolet property, weather resistance and covering power of the moisture-absorbing, breathable and anti-condensation coating; kaolin can further improve the hardness, abrasion resistance and adhesion of the moisture-absorbing, breathable and anti-condensation coating and improve the glossiness; shell powder can further consume solid waste resources, protect the environment, and endow the coating with antibacterial and purification properties. Description of the Drawings

[0037] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 It is the SEM electron micrograph of the coating in Example 3 of the present invention magnified 1000 times;

[0039] Figure 2 It is the SEM electron micrograph of the coating in Example 3 of the present invention magnified 4000 times. Detailed Embodiments

[0040] The following embodiments are provided to better understand the present invention further. It is not limited to the described optimal embodiment, and does not limit the content and protection scope of the present invention. Any product identical or similar to the present invention obtained by anyone under the inspiration of the present invention or by combining the features of the present invention with those of other existing technologies falls within the protection scope of the present invention.

[0041] For those embodiments where specific experimental steps or conditions are not indicated, the operations or conditions of the conventional experimental steps described in the literature in this field can be followed. For the reagents or instruments whose manufacturers are not indicated, they are all conventional reagent products that can be obtained through commercial purchase.

[0042] All the following raw materials can be obtained through commercial purchase, and no requirements are made for their sources. In the following embodiments, the Xiuyu tailings powder can be purchased from Wankelai Enterprise Group Jade Mining Co., Ltd., Xiuyan Manchu Autonomous County, Anshan City, Liaoning Province.

[0043] Example 1

[0044] This embodiment provides a preparation method of a moisture-absorbing, breathable and anti-condensation coating, which includes the following steps:

[0045] (1) By mass, the powder materials include 15 parts of 800-mesh Xiuyu tailings powder, 5 parts of titanium dioxide, 5 parts of shell powder, and 3 parts of heavy calcium carbonate. The framework materials include 10 parts of diatomite with a pore size of 2 - 10 nm, 5 parts of zeolite with a pore size of 10 - 50 nm, and 6 parts of montmorillonite with a pore size of 3 - 5 nm. The powder materials and the framework materials are mixed evenly to form a powder mixture.

[0046] (2) 0.5 part of Dispersago-9880 dispersant, 20 parts of pure acrylic emulsion, and 30 parts of water are dispersed evenly, and 0.2 part of bentonite is added and stirred evenly to form a liquid mixture. The powder mixture and the liquid mixture are mixed evenly, and 0.3 part of Sago-8030 stabilizer and 0.5 part of NOPCO NXZ defoamer are added and mixed evenly to obtain the moisture-absorbing, breathable and anti-condensation coating.

[0047] The moisture-absorbing, breathable and anti-condensation coating has no hard lumps, shows a uniform state after stirring, and there is no obstacle when applying two coats on the wall; the wall coating after application is intact.

[0048] Example 2

[0049] This embodiment provides a preparation method of a moisture-absorbing, breathable and anti-condensation coating, which includes the following steps:

[0050] (1) By mass, the powder materials include 15 parts of 500-mesh Xiuyu tailings powder, 10 parts of titanium dioxide, 3 parts of shell powder, and 5 parts of heavy calcium carbonate. The framework materials include 11 parts of diatomite with a pore size of 2 - 10 nm and 5 parts of montmorillonite with a pore size of 3 - 5 nm. The powder materials and the framework materials are mixed evenly to form a powder mixture.

[0051] (2) Disperse 0.5 parts of BYK-142 dispersant, 20 parts of pure acrylic emulsion and 30 parts of water evenly, add 0.2 parts of bentonite and stir evenly to form a liquid material; mix the powder material and the liquid material evenly, add 0.3 parts of Sago-8030 stabilizer and 0.5 parts of NOPCO NXZ defoamer and mix evenly to obtain a moisture-absorbing, breathable and anti-condensation coating.

[0052] The moisture-absorbing, breathable and anti-condensation coating has no hard lumps, is in a uniform state after stirring, and there is no obstacle to applying two coats on the wall; the wall coating after application is intact.

[0053] Example 3

[0054] This example provides a preparation method of a moisture-absorbing, breathable and anti-condensation coating, which includes the following steps:

[0055] (1) By mass, the powder materials include 20 parts of 800-mesh serpentine tailings powder, 8 parts of titanium dioxide, 8 parts of heavy calcium carbonate, and 2 parts of kaolin, and the skeleton materials include 4 parts of 10-50nm zeolite and 8 parts of 3-5nm montmorillonite. Mix the powder materials and the skeleton materials evenly to form a powder material;

[0056] (2) Disperse 0.2 parts of DOWFAXTM 8390 dispersant, 22 parts of VAE emulsion and 27 parts of water evenly, add 0.4 parts of bentonite and stir evenly to form a liquid material. Mix the powder material and the liquid material evenly, add 0.3 parts of Sago-8030 stabilizer and 0.5 parts of MSD-201 dimethyl silicone oil defoamer and mix evenly to obtain a moisture-absorbing, breathable and anti-condensation coating.

[0057] The moisture-absorbing, breathable and anti-condensation coating has no hard lumps, is in a uniform state after stirring, and there is no obstacle to applying two coats on the wall; the wall coating after application is intact.

[0058] The SEM electron micrographs of the coating after drying at 1000 times and 4000 times magnification are shown in Figure 1-2 , it can be seen that there are a large number of voids inside the microscopic structure of the coating, and there are connected voids between the particles, indicating that the particles are not closely packed. The voids between the particles enable the coating to contact the environment and achieve material interaction, and the moisture-absorbing, breathable and anti-condensation properties are better.

[0059] Example 4

[0060] This example provides a preparation method of a moisture-absorbing, breathable and anti-condensation coating, which includes the following steps:

[0061] (1) By mass parts, the powder material includes 2 parts of 800-mesh serpentine tailing powder, 15 parts of titanium dioxide, 7 parts of shell powder, 8 parts of heavy calcium carbonate, and 5 parts of kaolin. The skeleton material includes 6 parts of 2-10nm diatomaceous earth and 6 parts of 10-50nm zeolite. Mix the powder material and the skeleton material evenly to form a powder mixture;

[0062] (2) Disperse 0.5 part of Anjeka-6270A dispersant, 20 parts of pure acrylic emulsion, and 30 parts of water evenly, add 0.2 part of bentonite and stir evenly to form a liquid mixture; Mix the powder mixture and the liquid mixture evenly, and add 0.3 part of Sago-8300 stabilizer and 0.4 part of Sago-1552 defoamer and mix evenly; Obtain the moisture-absorbing, breathable and anti-condensation coating.

[0063] The moisture-absorbing, breathable and anti-condensation coating has no hard lumps, shows a uniform state after stirring, and there is no obstacle in applying two coats on the wall; The wall coating after application is intact.

[0064] Example 5

[0065] This example provides a preparation method of a moisture-absorbing, breathable and anti-condensation coating, which includes the following steps:

[0066] (1) By mass parts, the powder material includes 10 parts of 1000-mesh serpentine tailing powder, 10 parts of titanium dioxide, 3 parts of shell powder, 5 parts of heavy calcium carbonate. The skeleton material includes 5 parts of 500-mesh serpentine tailing powder, 11 parts of 2-10nm diatomaceous earth and 5 parts of 3-5nm montmorillonite. Mix the powder material and the skeleton material evenly to form a powder mixture;

[0067] (2) Disperse 0.5 part of BYK-142 dispersant, 20 parts of pure acrylic emulsion, and 30 parts of water evenly, add 0.2 part of bentonite and stir evenly to form a liquid mixture; Mix the powder mixture and the liquid mixture evenly, and add 0.3 part of Sago-8030 stabilizer and 0.5 part of NOPCO NXZ defoamer and mix evenly to obtain the moisture-absorbing, breathable and anti-condensation coating.

[0068] The moisture-absorbing, breathable and anti-condensation coating has no hard lumps, shows a uniform state after stirring, and there is no obstacle in applying two coats on the wall; The wall coating after application is intact.

[0069] Comparative Example 1

[0070] This comparative example provides a preparation method of a moisture-absorbing, breathable and anti-condensation coating. Compared with Example 2, the difference is only that diatomaceous earth and montmorillonite are not added.

[0071] Comparative Example 2

[0072] This comparative example provides a preparation method of a moisture-absorbing, breathable and anti-condensation coating. Compared with Example 2, the difference is only that serpentine tailing powder is not added.

[0073] Test Example

[0074] Performance tests were carried out on the coatings prepared in each example and comparative example, as follows:

[0075] (1) Low-temperature stability: Tested according to GB / T 9755-2024 "Synthetic resin emulsion wall coatings", and the results are shown in Table 2;

[0076] (2) Water resistance: Tested according to GB / T 9755-2024 "Synthetic resin emulsion wall coatings", and the results are shown in Table 2;

[0077] (3) Alkali resistance: Tested according to GB / T 9755-2024 "Synthetic resin emulsion wall coatings", and the results are shown in Table 2;

[0078] (4) Contrast ratio: The coating was applied on the wall, and the proportion of covering the underlying color was tested according to GB / T 9755-2024 "Synthetic resin emulsion wall coatings", and the results are shown in Table 2;

[0079] (5) Water vapor transmission rate V: Tested according to JG / T 309-2011 "Determination and classification of water vapor transmission rate of exterior wall coatings", and the results are shown in Table 2;

[0080] (6) Scrub resistance: Tested according to the number of times in GB / T 9755-2024 "Synthetic resin emulsion wall coatings", and the results are shown in Table 2;

[0081] Table 2

[0082]

[0083] As can be seen from Table 2, the moisture-absorbing, breathable and anti-condensation coating provided by the present invention has good low-temperature stability, water resistance, scrub resistance and alkali resistance, strong ability to cover the substrate, and high water vapor transmission rate, indicating that the wall has a certain breathing function, making the coating not easily damaged and reducing the phenomena of condensation and mildew. According to JG / T 309-2011 "Determination and classification of water vapor transmission rate of exterior wall coatings", the water vapor transmission rate of the moisture-absorbing, breathable and anti-condensation coating provided by the present invention is all > 150 g / (m 2 ·d), indicating a high water vapor transmission rate.

[0084] From the comparison between the examples and the comparative examples, it can be seen that jade tailings and porous mineral materials can significantly improve the air permeability of the coating. While effectively utilizing solid waste resources, the prepared coating also has good low-temperature stability, water resistance, alkali resistance, contrast ratio and water vapor transmission rate. Existing commercially available elastic coatings have problems such as poor air permeability and easy environmental pollution. When constructed on a wet substrate, they also have adverse phenomena such as peeling and falling off due to their hydrophobicity, and poor ability to cover the substrate.

[0085] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to exhaustively list all implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of this invention.

Claims

1. A moisture-absorbing, breathable, anti-condensation coating, characterized in that: It includes a film-forming base material, a powder material and a skeleton material; the powder material includes jade tailings; and the skeleton material includes a porous mineral material.

2. The moisture-absorbing, breathable, anti-condensation coating according to claim 1, characterized in that: The mass ratio of the jade tailings in the powder material to the porous mineral material in the skeleton material is (5-20):(5-20); and / or, The particle size of the jade tailings is 300-1000 mesh; and / or, The porous mineral material comprises nanopores and / or micropores; and / or, The porous mineral material includes at least one of zeolite, sepiolite, montmorillonite and diatomaceous earth.

3. The moisture-absorbing, breathable, anti-condensation coating according to claim 1 or 2, characterized in that: The skeleton material also includes jade tailings; Preferably, the mass ratio of the jade tailings in the skeleton material to the porous mineral material is (0-10):(5-20).

4. The moisture-absorbing, breathable, anti-condensation coating according to any one of claims 1 to 3, characterized in that: The powder material also includes fillers; Preferably, the mass ratio of jade tailings to filler in the powder material is (5-20):(5-20); Preferably, the filler includes at least one of titanium dioxide, shell powder, light calcium carbonate, heavy calcium carbonate, barite powder, talcum powder, silicon dioxide, white carbon black, mica powder, wollastonite, bentonite and kaolin.

5. The moisture-absorbing, breathable, anti-condensation coating according to claim 4, characterized in that: The film-forming base material includes an emulsion and an auxiliary agent; Preferably, the mass ratio of the emulsion to the auxiliary agent is (15-30):(0.2-4); Preferably, the auxiliary agent includes a suspending agent and / or a modifying agent; Preferably, the mass ratio of the emulsion, the suspending agent and the improving agent is (15-30):(0.2-2):(1-2).

6. The moisture-absorbing, breathable, anti-condensation coating according to claim 5, characterized in that: The emulsion comprises at least one of styrene-acrylic emulsion, pure acrylic emulsion, VAE emulsion and polyurethane emulsion; and / or, The suspending agent comprises at least one of bentonite and attapulgite; and / or, The improver includes at least one of a dispersant, a defoamer, and a stabilizer; and / or, The film-forming binder also includes a solvent.

7. The moisture-absorbing, breathable, anti-condensation coating according to any one of claims 1 to 6, characterized in that: The mass ratio of the film-forming base material, the powder material and the skeleton material is (0.2-64):(5-60):(5-30).

8. A method for preparing a moisture-absorbing, breathable, anti-condensation coating, characterized in that: The film-forming base material, the powder material and the skeleton material are mixed evenly to obtain a moisture-absorbing, breathable and anti-condensation coating; the powder material comprises jade tailings; and the skeleton material comprises a porous mineral material.

9. The preparation method according to claim 8, characterized in that: The powder material and the skeleton material are mixed evenly, and then the film-forming base material is added and mixed evenly to obtain a moisture-absorbing, breathable and anti-condensation coating.

10. Use of the hygroscopic, breathable, anti-condensation coating according to any one of claims 1 to 7 or the hygroscopic, breathable, anti-condensation coating prepared by the preparation method according to any one of claims 8 to 9 in the protection of buildings, bridges, tunnels, refrigeration equipment, vehicles and ancient buildings.

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