A coating composition, its preparation method and application

Abstract

This invention discloses a coating composition, its preparation method, and its application, relating to the field of coating technology. The coating composition of this invention comprises an emulsion, functional microspheres, functional fillers, and functional additives; the functional microspheres are gel microspheres; the functional fillers include expanded microspheres; and the functional additives include organosilicon elastomer microspheres. The coating composition of this invention exhibits excellent resilience and a smooth, skin-feeling feel, achieving a dual effect of resilience and smoothness, and can be used to prepare resilient, skin-feeling coatings, suitable for wall decoration applications.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a coating composition, its preparation method, and its application. Background Technology

[0002] With the upgrading of home furnishing consumption concepts, consumers' demands for wall materials have shifted from traditional aesthetics and durability to functional dimensions such as safety, protection, and comfort. On the one hand, walls occupy a large proportion of home space, and flexible, resilient wall paint provides protection by cushioning falls and bumps, reducing the risk of accidental injury. On the other hand, sight, hearing, and touch constitute the main proportion of human interaction with space. High-end residences, hotels, kindergartens, and other scenarios are no longer satisfied with a single visual effect, but pursue a soft touch similar to fabrics and leather to enhance the quality of space and living comfort. Therefore, developing wall paints that combine resilient protection with a multi-sensory comfort experience of touch and sight is an urgent market demand.

[0003] Existing technology discloses a foamed interior wall coating composition, which is a water-based polyurethane foam coating. The foam structure produced by foaming provides children with a gentle touch and impact-absorbing effect, but it only achieves flexible wall protection and does not provide a comfortable skin-feel experience. It borrows leather foaming technology to prepare foamed wall coatings, but this technology requires on-site foaming and cannot be left to stand for long periods; it requires repeated foaming, resulting in high on-site performance randomness. In addition, existing technology discloses a 3D resilient skin-feel paint, which uses resilient foam particles to achieve the coating's resilience and skin feel. However, in the preparation of resilient foam particles, grinding the elastomer is difficult, and grinding is often carried out in liquid nitrogen, resulting in high costs and making mass production difficult. Furthermore, due to the irregular shape of the resilient foam particles, the skin feel of the prepared paint film needs improvement. Summary of the Invention

[0004] The present invention aims to at least solve one of the aforementioned technical problems existing in the prior art. Therefore, the object of the present invention is to provide a coating composition that utilizes a triple-resilience synergistic system formed by combining functional microspheres, functional fillers, and functional additives to achieve both resilience and skin-feel effects.

[0005] A second aspect of the present invention is to provide a method for preparing a coating composition.

[0006] A third aspect of the present invention is to provide a resilient, skin-feeling coating.

[0007] A third aspect of the present invention is to provide an application of a coating composition or a resilient, skin-feel coating in the field of construction.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A first aspect of the present invention provides a coating composition comprising an emulsion, functional microspheres, functional fillers, and functional additives; wherein the functional microspheres are gel microspheres; the functional fillers include expanded microspheres; and the functional additives include silicone elastomer microspheres.

[0009] The coating composition provided by this invention contains functional microspheres, functional fillers, and functional additives, which, when combined, form a triple-resilience synergistic system. The functional microspheres are gel microspheres; after the water in the gel evaporates, they create a compressible, spring-like cavity effect. The functional fillers, through a floating effect, form micro-protrusions on the surface of the paint film formed by the coating composition, providing a velvety feel. The functional additives, by being uniformly dispersed on the surface of the paint film formed by the coating composition, provide a low-friction, smooth feel. Therefore, the coating composition of this invention has excellent resilience and skin feel, achieving a dual effect of resilience and skin feel. It should be understood that "resilient skin feel" refers to the paint film possessing a delicate and smooth touch (i.e., skin feel), while simultaneously exhibiting the elastic deformation ability to quickly rebound without leaving marks after being pressed / forced (i.e., resilience).

[0010] It should be understood that the expanded microspheres are thermoplastic hollow polymer microspheres, consisting of a thermoplastic polymer (such as acrylonitrile copolymer) shell encapsulating liquid alkane gas (such as isobutane or isopentane), and have already undergone a pre-expansion process. That is, the expanded microspheres in this invention are pre-expanded expanded microspheres, and can function normally and play their role regardless of whether the formulation contains heat or water. For example, the commercially available product Expancel 044 WE 20 d36.

[0011] Preferably, the mass ratio of the functional microspheres, the functional filler, and the functional additive is 1:(0.04~0.5):(0.04~0.5).

[0012] More preferably, the mass ratio of the functional microspheres, the functional filler, and the functional additive is 1:(0.06~0.25):(0.06~0.3).

[0013] More preferably, the mass ratio of the functional microspheres, the functional filler, and the functional additive is 1:(0.1~0.25):(0.2~0.3).

[0014] More preferably, the mass ratio of the functional microspheres, the functional filler and the functional additive is 1:(0.1~0.2):(0.2~0.3).

[0015] More preferably, the mass ratio of the functional microspheres, the functional filler, and the functional additive is 1:(0.15~0.2):(0.2~0.25).

[0016] Preferably, the raw materials for preparing the functional microspheres include a polysaccharide mixture, a first crosslinking solution, and a second crosslinking solution; The polysaccharide mixture includes sodium alginate, carrageenan, montmorillonite, hexadecyl alcohol ester, and water; The first crosslinking solution contains calcium chloride, strontium chloride, and chitosan; The second crosslinking solution contains calcium chloride, strontium chloride and polyvinyl alcohol.

[0017] In the functional microspheres of this invention, the addition of sodium alginate makes the formed functional microspheres more elastic and soft, providing a better foundation for the resilience of the cavity formed after subsequent dehydration; the addition of hexadecyl alcohol ester shears the polysaccharide solution (sodium alginate solution) to form a W / O emulsion, and then dripping the entire polysaccharide emulsion into the crosslinking solution helps to control the size of the microspheres; the addition of montmorillonite further enhances the water adsorption effect of the gel, making the difference between the microspheres before and after dehydration even greater, and further increasing the resilience of the cavity formed.

[0018] More preferably, the polysaccharide mixture comprises the following components by mass percentage: Sodium alginate 1-4%, carrageenan 0.2-1%, montmorillonite 0.1-0.5%, hexadecyl alcohol ester 0.5-1%, balance water.

[0019] More preferably, the polysaccharide mixture comprises, by mass percentage, the following components: Sodium alginate 2-3%, carrageenan 0.6-1%, montmorillonite 0.1-0.3%, hexadecyl alcohol ester 0.6-1%, balance water.

[0020] More preferably, the content of each component in the first crosslinking solution and the second crosslinking solution satisfies at least one of the following conditions: a) The concentration of calcium chloride in the first cross-linking solution is 0.8~2 mol / L; b) The concentration of strontium chloride in the first crosslinking solution is 0.2~0.6 mol / L; c) The mass content of chitosan in the first cross-linking solution is 0.05~0.3%; d) The concentration of calcium chloride in the second crosslinking solution is 0.5~1.2 mol / L; e) The concentration of strontium chloride in the second crosslinking solution is 0.05~0.5 mol / L; f) The mass content of polyvinyl alcohol in the second crosslinking solution is 0.01~0.1%.

[0021] More preferably, the content of each component in the first crosslinking solution and the second crosslinking solution satisfies at least one of the following conditions: a) The concentration of calcium chloride in the first cross-linking solution is 1~2 mol / L; b) The concentration of strontium chloride in the first crosslinking solution is 0.3~0.5 mol / L; c) The chitosan content in the first cross-linking solution is 0.05~0.15% by mass; d) The concentration of calcium chloride in the second crosslinking solution is 0.6~1 mol / L; e) The concentration of strontium chloride in the second crosslinking solution is 0.1~0.3 mol / L; f) The mass content of polyvinyl alcohol in the second crosslinking solution is 0.03~0.07%.

[0022] More preferably, the method for preparing the functional microspheres includes the following steps: After reacting the polysaccharide mixture with the first cross-linking solution, the reactants react with the second cross-linking solution to obtain the functional microspheres.

[0023] More preferably, the method for preparing the functional microspheres includes the following steps: The polysaccharide mixture was titrated into the first cross-linking solution to carry out the first reaction; the reactants after the first reaction were added to the second cross-linking solution to carry out the second reaction; after the second reaction, the solid and liquid were separated and the precipitate was collected to obtain the functional microspheres.

[0024] More preferably, the titration flow rate is 1~1.5 mL / min.

[0025] More preferably, the time for the first reaction is 40-50 seconds.

[0026] More preferably, the second reaction takes 10 to 20 minutes.

[0027] Specifically, the functional microspheres obtained by this invention are natural anionic calcium cross-linked microspheres, which are polysaccharide calcium cross-linked hydrogel microspheres.

[0028] Preferably, the particle size of the functional microspheres is 5~20μm.

[0029] Preferably, the emulsion comprises a polyurethane dispersion.

[0030] Preferably, the functional filler is a wet-type expanded microsphere.

[0031] Preferably, the functional additive is an organosilicon elastomer microsphere with surface-grafted epoxy groups and polyurethane groups, which can provide a silky and smooth touch while increasing the crosslinking density of the system, and provide a micro-velvety feel.

[0032] Preferably, the coating composition further includes cellulose, film-forming aids, inorganic fillers, pH adjusters, defoamers, thickeners, surfactants, bactericides and fungicides, and water.

[0033] Preferably, the coating composition comprises the following components in parts by weight: The composition includes: 30-50 parts emulsion, 10-25 parts functional microspheres, 1-5 parts functional filler, 1-5 parts functional additives, 0.1-0.6 parts cellulose, 0.2-1 part film-forming aid, 10-20 parts inorganic filler, 0.1-0.5 parts pH adjuster, 0.1-0.4 parts defoamer, 0.4-2.5 parts thickener, 0.2-0.6 parts surfactant, 0.2-1 part bactericide and fungicide, and 10-30 parts water.

[0034] More preferably, the coating composition comprises the following components in parts by weight: The composition includes: 40-50 parts emulsion, 10-20 parts functional microspheres, 1-3 parts functional filler, 1-3 parts functional additives, 0.1-0.3 parts cellulose, 0.3-0.7 parts film-forming aid, 10-15 parts inorganic filler, 0.1-0.3 parts pH adjuster, 0.1-0.3 parts defoamer, 1-1.5 parts thickener, 0.2-0.5 parts surfactant, 0.5-1 part bactericide and fungicide, and 10-30 parts water.

[0035] More preferably, the coating composition comprises the following components in parts by weight: The composition includes: 40-50 parts emulsion, 10-20 parts functional microspheres, 1-3 parts functional filler, 1-3 parts functional additives, 0.1-0.6 parts cellulose, 0.2-1 parts film-forming aid, 10-20 parts inorganic filler, 0.1-0.5 parts pH adjuster, 0.1-0.4 parts defoamer, 0.4-2.5 parts thickener, 0.2-0.6 parts surfactant, 0.2-1 parts bactericide and fungicide, and 15-25 parts water.

[0036] A second aspect of the present invention provides a method for preparing the coating composition described in the first aspect of the present invention, comprising the following steps: The components of the coating composition are mixed to obtain the coating composition.

[0037] Preferably, the method for preparing the coating composition includes the following steps: First, add some water and surfactants, defoamers, cellulose, and pH adjusters and mix at 200-300 r / min. Then, add inorganic fillers and functional fillers at 800-1000 r / min and mix and disperse at 1200-1400 r / min. Subsequently, add emulsion, functional additives, and functional microspheres at 500-600 r / min and mix and disperse. Add film-forming aids at the same rotation speed and mix and disperse. Continue to add bactericides, fungicides, thickeners, and water, and mix to obtain the coating composition.

[0038] More preferably, the bactericide and antifungal agent is diluted with 5 to 6 times the amount of water before being added.

[0039] A third aspect of the present invention provides a resilient skin-feel coating, wherein the raw materials for preparing the resilient skin-feel coating include the coating composition described in the first aspect of the present invention.

[0040] A fourth aspect of the present invention provides the application of the coating composition described in the first aspect of the present invention or the resilient skin-feel coating described in the third aspect of the present invention in the field of wall decoration.

[0041] Preferably, the coating composition or the resilient, skin-feel coating is used for wall decoration in residences, hotels, schools, or kindergartens.

[0042] Compared with the prior art, the beneficial effects of the present invention are: The coating composition provided by this invention contains functional microspheres, functional fillers, and functional additives, which, when combined, form a triple-resilience synergistic system. The functional microspheres are gel microspheres; after the water in the gel evaporates, they create a compressible, spring-like cavity effect. The functional fillers, through a floating effect, form micro-protrusions on the surface of the paint film formed by the coating composition, providing a velvety feel. The functional additives, by being uniformly dispersed on the surface of the paint film, provide a low-friction, smooth feel. Therefore, the coating composition of this invention exhibits excellent resilience and skin feel, achieving both resilience and skin feel effects. Compared to traditional foamed coatings and other technologies, it avoids the problems of high performance uncertainty during on-site use due to repeated foaming, and the inability to simultaneously achieve skin feel and resilience. It also avoids the problems of traditional resilience skin-feel paints requiring the addition of resilience foam particles, resulting in high costs and difficulties in mass production. Therefore, the coating composition of this invention can be used to prepare resilience skin-feel coatings and is suitable for the field of wall decoration. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the wet film morphology of the coating composition in Example 1.

[0044] Figure 2 This is a schematic diagram of the dry film morphology of the coating composition in Example 1.

[0045] Figure 3 This is a schematic diagram of the light touch mode test in the skin feel test.

[0046] Figure 4 This is a schematic diagram of the stroking mode test in the skin feel test.

[0047] Figure 5 This is a schematic diagram of the fingertip pressing mode test in the skin feel test.

[0048] Figure 6 This is a schematic diagram of the hand-slipping mode test in the skin feel test. Detailed Implementation

[0049] The present invention will be further described in detail below through specific embodiments. Unless otherwise specified, the raw materials, reagents, or apparatus used in the embodiments and comparative examples are all available from conventional commercial sources or can be obtained by existing technical methods. Unless otherwise specified, the test or experimental methods are conventional methods in the art.

[0050] The following describes some of the raw materials used in the following embodiments and comparative examples of the present invention: Emulsion: Aliphatic polyether polyurethane dispersion, Archsol® 8355, Wanhua Chemical Group Co., Ltd.

[0051] Functional filler: Lightweight wetting expandable microspheres, Expancel 044 WE 20 d36, Noron Chemicals Ltd.

[0052] Functional additives: Organosilicon elastomer microspheres with surface-grafted epoxy groups and polyurethane groups, FE213N, Heke Materials Technology (Shanghai) Co., Ltd.

[0053] Cellulose: Hydroxyethyl cellulose, Ashland Natrosol Plus 550.

[0054] Inorganic fillers: Longmang titanium dioxide R996, IMERYS diatomaceous earth Celite 499 and Guangfu wood heavy calcium carbonate powder CC700.

[0055] Film-forming aid: dodecyl alcohol ester (CZ-12), commercially available.

[0056] pH adjuster: TAMINCO neutralizer VANTEX-T Defoamer: BASF ST 2410AG.

[0057] Thickener: Polyurethane thickener, ACRYSOL RM-8W, Dow Chemical.

[0058] Surfactant: SN-WET 996, from Sannopco, Japan.

[0059] Bactericides and fungicides: THOR ACTICIDE ICB-3; LANXESS BIOX P520W; THOR ACTICIDE OTW.

[0060] The raw materials for preparing functional microspheres are as follows: Polysaccharide mixture: 2.5wt% sodium alginate (MWF 200 mesh) from Qingdao Mingyue Algae Group Co., Ltd., 0.8wt% carrageenan, 0.2wt% montmorillonite, 0.8wt% hexadecyl alcohol ester, balance deionized water; First cross-linking solution (external bath): aqueous solution containing 1.5 mol / L calcium chloride, 0.4 mol / L strontium chloride, and 0.1 wt% chitosan; Second crosslinking solution (inner bath): aqueous solution containing 0.8 mol / L calcium chloride, 0.2 mol / L strontium chloride, and 0.05 wt% polyvinyl alcohol; The water used in the first and second crosslinking solutions is deionized water.

[0061] The preparation method of functional microspheres is as follows: 20 mL of polysaccharide mixture was titrated into 240 mL of the first crosslinking solution at a flow rate of 1.2 mL / min through a nozzle with a diameter of 80 μm. The reaction was allowed to proceed for 45 s. The resulting product was then transferred to 300 mL of the second crosslinking solution and reacted under magnetic stirring for 10 min. After the reaction, the microspheres (precipitate) were collected by centrifugation and washed with pure water to remove excess calcium ions, yielding functional microspheres (particle size range of 5-20 μm).

[0062] The following detailed description is provided in conjunction with specific embodiments and comparative examples.

[0063] Example 1 A coating composition, the formulation of which is shown in Table 1, is prepared as follows: Add some deionized water (first-time water) to the container, then place it under an experimental dispersion mill. At a speed of 200-300 r / min, add surfactant, defoamer, and cellulose in sequence. Add pH adjuster, increase the speed to 800-1000 r / min, add inorganic filler and functional filler, adjust the speed to 1200-1400 r / min, disperse for 15 minutes, add an appropriate amount of deionized water (second-time water) to cool down, reduce the speed to 500-600 r / min, add emulsion, functional additives, and functional microspheres, disperse for 3-5 minutes, add film-forming aid, disperse for 3-5 minutes, then add bactericide and antifungal agent, slowly add thickener, add the remaining deionized water (third-time water), and continue stirring for 5-8 minutes.

[0064] Examples 2-3 The formulations of the coating compositions in Examples 2 and 3 are shown in Table 1, and the preparation methods are the same as in Example 1.

[0065] Table 1 Formulation table (parts by weight) of coating compositions for examples and comparative examples

[0066] Comparative Examples 1-4 The formulations of the coating compositions for Comparative Examples 1 to 4 are shown in Table 2, and the preparation methods are the same as in Example 1.

[0067] Table 2 Formulation table (parts by weight) of coating compositions for examples and comparative examples

[0068] Result detection The above-described embodiments and comparative examples were used as resilient, skin-feeling paints and tested.

[0069] 1) Resilience test: Testing instrument: Shore hardness tester, type A; Sample preparation: Black matte glass plate, 800μm film coating, 2 coats, 24h interval between each coat.

[0070] 2) Skin feel test: Test environment: The test shall be conducted in accordance with the requirements for standard atmosphere in GB / T6529-2008. Sample conditioning: The sample was conditioned to humidity for 24 hours under standard atmospheric conditions; Sample preparation: A4 cotton cement board was coated using a water-based resilient skin-feel paint system. After coating, the board was dried for 7 days before testing. The specific coating process can be found in the following steps: On a cement board, a conventional commercially available interface agent, putty, and latex paint primer are sequentially applied by roller, followed by the topcoat of this invention. The topcoat is the water-based, resilient, skin-feel wall paint of this invention. The application steps follow the latex paint industry's one-primer-two-topcoat application process, i.e., one primer and two topcoats; a small textured roller is used; the first topcoat application rate is 250~270g / m². 2 Second coat of topcoat: 190~205g / m² 2 Construction environment: Construction should be carried out in an environment with a temperature greater than 10℃ and a humidity less than 75%.

[0071] It should be noted that the present invention does not limit the specific construction process. The coating amount and dilution ratio can be adjusted appropriately according to different construction methods and scenarios.

[0072] Test Preparation: 5 evaluators should clean their hands beforehand using a neutral hand sanitizer or soap without moisturizer and gently dry them with a paper towel. They should rest calmly for 30 minutes to avoid fatigue and changes in hand temperature caused by strenuous exercise. Before the evaluation, the operator should rank the samples according to five dimensions: smoothness (corresponding to smooth resistance), softness (corresponding to softness and firmness), velvetness (corresponding to the presence or absence of velvet), temperature (corresponding to temperature), and comfort (corresponding to tactile comfort). The two samples with the highest and lowest values ​​in each dimension should be selected as the boundary values ​​for subjective perception, and these two samples should be used as reference samples and marked. Before the evaluation begins, the reference samples should be given to the evaluators for experience. During the evaluation, the evaluators may request to experience the reference samples again.

[0073] Evaluation method: Refer to the instruction manual Figures 3-6 It includes touch mode, stroke mode, fingertip press mode, and back-of-hand gliding mode. Touch mode: Press Figure 3 Gently touch the paint surface with your hand; Touch mode: Press Figure 4 Press the paint film with one hand and rub it with the other hand; fingertip pressing mode: press Figure 5 Press the paint film with one hand and rub it with the fingertips of the other hand; back-of-hand gliding mode: press Figure 6 Press the paint film down with one hand and rub it with the back of the other hand. The evaluation result is recorded as a score, ranging from 0 to 10. The higher the score, the better the effect, and 5 is the passing score.

[0074] The test results are shown in Table 3.

[0075] Table 3. Test results of the coating compositions of the examples and comparative examples as resilient skin-feel paints.

[0076] By comparing Example 1 with Comparative Example 1, Example 2 with Comparative Example 2, and Example 3 with Comparative Examples 3-4, it can be seen that omitting functional microspheres, functional fillers, or functional additives, or omitting functional microspheres, functional fillers, and functional additives simultaneously, will lead to varying degrees of deterioration in resilience and skin feel.

[0077] Comparing Examples 1-3, it can be seen that, with the remaining components used in the same or similar amounts, changing the ratio of functional microspheres, functional fillers, and functional additives can adjust the resilience and feel of the resulting resilient skin-feel coating. Different Shore hardness values ​​are observed, and the scores for smoothness, softness, velvetiness, warmth / coolness, and comfort also differ. The coating composition of Example 1 exhibits better resilience and skin feel than that of Examples 2 and 3.

[0078] Figure 1 , Figure 2The figures show the wet and dry film morphologies of the coating composition in Example 1. It can be seen that in the dry film, the functional microspheres lose water to form compressible, spring-like cavities.

[0079] In summary, the coating composition provided by this invention contains functional microspheres, functional fillers, and functional additives. The combination of these three components forms a triple-resilience synergistic system, exhibiting excellent resilience and a smooth, skin-feeling texture, achieving both resilience and a pleasant feel. Furthermore, compared to traditional foaming coatings and other technologies, this invention avoids the problems of repeated foaming leading to high performance uncertainty during on-site application and the inability to simultaneously achieve both skin feel and resilience. It also avoids the issues of traditional resilience skin-feel paints requiring the addition of resilience foam particles, resulting in high costs and difficulties in mass production. Therefore, the coating composition of this invention can be used to prepare resilience skin-feel coatings and is suitable for the field of wall decoration.

[0080] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A coating composition, characterized in that, The coating composition includes an emulsion, functional microspheres, functional fillers, and functional additives; the functional microspheres are gel microspheres; the functional fillers include expanded microspheres; and the functional additives include silicone elastomer microspheres.

2. The coating composition according to claim 1, characterized in that, The mass ratio of the functional microspheres, the functional filler, and the functional additive is 1:(0.04~0.5):(0.04~0.5).

3. The coating composition according to claim 1, characterized in that, The raw materials for preparing the functional microspheres include a polysaccharide mixture, a first cross-linking solution, and a second cross-linking solution; The polysaccharide mixture includes sodium alginate, carrageenan, montmorillonite, hexadecyl alcohol ester, and water; The first crosslinking solution contains calcium chloride, strontium chloride, and chitosan; The second crosslinking solution contains calcium chloride, strontium chloride and polyvinyl alcohol.

4. The coating composition according to claim 3, characterized in that, The polysaccharide mixture comprises the following components by mass percentage: Sodium alginate 1-4%, carrageenan 0.2-1%, montmorillonite 0.1-0.5%, hexadecyl alcohol ester 0.5-1%, balance water.

5. The coating composition according to claim 3 or 4, characterized in that, The preparation method of the functional microspheres includes the following steps: After reacting the polysaccharide mixture with the first cross-linking solution, the reactants react with the second cross-linking solution to obtain the functional microspheres.

6. The coating composition according to claim 1 or 2, characterized in that, The coating composition also includes cellulose, film-forming aids, inorganic fillers, pH adjusters, defoamers, thickeners, surfactants, bactericides and fungicides, and water.

7. The coating composition according to claim 6, characterized in that, The coating composition comprises the following components in parts by weight: The composition includes: 30-50 parts emulsion, 10-25 parts functional microspheres, 1-5 parts functional filler, 1-5 parts functional additives, 0.1-0.6 parts cellulose, 0.2-1 part film-forming aid, 10-20 parts inorganic filler, 0.1-0.5 parts pH adjuster, 0.1-0.4 parts defoamer, 0.4-2.5 parts thickener, 0.2-0.6 parts surfactant, 0.2-1 part bactericide and fungicide, and 10-30 parts water.

8. A method for preparing a coating composition according to any one of claims 1 to 7, characterized in that, Includes the following steps: The components of the coating composition are mixed to obtain the coating composition.

9. A resilient, skin-feel coating, characterized in that, The raw materials for preparing the resilient skin-feel coating include the coating composition according to any one of claims 1 to 7.

10. The application of a coating composition according to any one of claims 1 to 7 or a resilient skin-feel coating according to claim 9 in the field of wall decoration.

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