An inorganic artificial stone, its preparation method and application

Abstract

The present invention discloses an inorganic artificial stone and its preparation method and application, belonging to the field of building decoration materials. The inorganic artificial stone provided by the present invention comprises a substrate and a penetrating protective agent infiltrated in the substrate and coated on the surface of the substrate; by weight, the raw materials for preparing the substrate comprise: 20-60 parts of an inorganic binder; 1-10 parts of nano-silica sol A; 30-80 parts of aggregate; 0.05-5 parts of a mixing liquid. The inorganic artificial stone provided by the present invention can effectively improve the stain resistance and mechanical strength of the inorganic artificial stone. The present invention also provides a preparation method and application of the above inorganic artificial stone.

Description

Technical Field

[0001] The present invention relates to the field of building decoration materials, and in particular to an inorganic artificial stone and its preparation method and application. Background Art

[0002] Inorganic artificial stones, organic artificial stones, natural stones, ceramic tiles, etc. are common decorative plates and are widely used in large-scale projects and home decorations. Among them, inorganic artificial stone is a building decoration material, which is made by mixing and pressing inorganic binders such as cement with aggregates, mineral admixtures, additives and other materials. Inorganic artificial stone has outstanding advantages such as environmental protection and excellent durability, but there are also some defects: the surface of cement-based artificial stone is easily contaminated during use, affecting its appearance quality. The surface contamination of inorganic artificial stone mainly comes from the porous and hydrophilic characteristics of cement-based products, resulting in easy adhesion of external pollutants on the surface. Solving the problem of easy contamination of cement-based artificial stone products will help expand the product market, improve the product quality, and achieve the goal of promoting the high-quality development of the industry.

[0003] In traditional technologies, in order to solve the problem of easy soiling of concrete, relevant researchers have made various attempts. Some technologies attempt to add additives with anti-fouling effects to inorganic artificial stones. For example, adding anti-fouling and antibacterial polycarboxylate water reducers, and the incorporation amount is 1% - 1.5% of the total weight of the gel material; for example, adding tridecafluorooctyltrimethoxysilane, higher fatty acids, etc., to make the concrete have hydrophobic and anti-fouling properties; for example, adding modified plant ash to increase the compactness, waterproofness of the concrete, and the plasticity and pumpability are good. Some technologies also attempt to change the types of fillers in inorganic artificial stones. For example, some technologies use waste tire rubber powder, rare earth tailings, coal cinder, copper mine tailings, which not only saves costs, but also increases the compactness and impermeability of the concrete. There are also technologies that attempt to modify inorganic artificial stones with waterproof agents. For example, adding a waterproof agent with strong permeability, which can penetrate to 3 - 8 cm below the surface layer of the concrete, and the formed eutectic grows along the capillary pores of the concrete, plugging all the pores of the concrete, which can not only enhance the compactness of the concrete, but also enhance the strength and hardness of the concrete substrate, achieving a waterproof effect with the same service life as the concrete; for another example, some technologies disclose a breathable and permeable concrete protective agent and its preparation method, which can solve the problems of small penetration depth, poor hydrophobic performance, poor water resistance, poor durability, and environmental pollution of traditional concrete protective agents; for another example, some technologies provide a tax-increasing and anti-fouling agent for concrete, which can make the concrete have hydrophobic and anti-fouling properties, but the problem of efflorescence still exists, and there are a large number of organic substances in the raw materials, which is not conducive to environmental protection.

[0004] Although inorganic artificial stone may contain a certain amount of cement-based materials, the methods used for anti-fouling of traditional concrete are generally not applicable to anti-fouling of inorganic artificial stone. The reasons are as follows: Inorganic artificial stone is formed by vacuum, vibration, and pressure, so the overall plate is dense, with a low porosity, and the water absorption rate can reach below 0.8%. While the water absorption rate of concrete is 3%. Using the same penetrant for concrete, the penetration effect on inorganic artificial stone is very poor, and it is difficult to penetrate deeply, failing to achieve the effect of plugging pores and anti-fouling.

[0005] In related technologies, the commonly used anti-fouling technology for inorganic artificial stone is the method of surface treatment with crystallization paste. Crystallization paste is a composite material. Due to pressure and heat, its small molecule materials are added into the pores on the surface of inorganic artificial stone, resulting in the technical problems of poor wear resistance and corrosion resistance of the surface protection substances. Due to its poor wear resistance and durability, frequent maintenance is required, leading to high maintenance costs and restricting the popularization of cement-based artificial stone.

[0006] In summary, it is very important to provide an inorganic artificial stone with high anti-fouling performance. Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides an inorganic artificial stone, which can effectively improve the anti-fouling performance and mechanical strength of the inorganic artificial stone.

[0008] The present invention also provides a preparation method for the above-mentioned inorganic artificial stone.

[0009] The present invention also provides an application of the above-mentioned inorganic artificial stone.

[0010] According to an embodiment of the first aspect of the present invention, there is provided an inorganic artificial stone, which includes a substrate and a penetrant-type protective agent infiltrated in the substrate and covering the surface of the substrate;

[0011] By weight, the preparation raw materials of the substrate include:

[0012]

[0013] The inorganic artificial stone according to the embodiment of the present invention has at least the following beneficial effects:

[0014] The nano-silica sol used in the present invention is practical. It can produce hydrated calcium silicate with unhydrated cement, free calcium hydroxide, and calcium oxide in the inorganic artificial stone to block pores and inhibit efflorescence. Combining with the penetrant-type protective agent arranged inside and on the surface of the substrate, it can jointly increase the density of the inorganic artificial stone, reduce the water absorption rate, achieve the anti-fouling effect, and at the same time play a strengthening role (enhancing the strength of the plate).

[0015] According to some embodiments of the present invention, the inorganic binder includes an inorganic cementitious material and an auxiliary cementitious material.

[0016] According to some embodiments of the present invention, the mass ratio of the inorganic cementitious material to the auxiliary cementitious material is 6 - 8:3. For example, specifically it is about 7:3.

[0017] According to some embodiments of the present invention, the inorganic cementitious material includes at least one of portland cement, aluminate cement, and phosphate cement.

[0018] According to some embodiments of the present invention, the auxiliary cementitious material includes at least one of limestone powder, natural pozzolan, and slag.

[0019] According to some embodiments of the present invention, by weight, in the raw materials for preparing the substrate, there are 50 - 55 parts of inorganic binder and 4 - 8 parts of nano - silica sol A. For example, the mass ratio of the inorganic binder to the nano - silica sol A can be 53:5.

[0020] According to some embodiments of the present invention, the pH of the nano - silica sol A is 7 - 9.

[0021] According to some embodiments of the present invention, the particle size of the nano - silica sol A is 1 - 50 nm.

[0022] According to some embodiments of the present invention, the particle size of the nano - silica sol A is 10 - 40 nm.

[0023] According to some embodiments of the present invention, the particle size of the nano - silica sol A is 20 - 30 nm.

[0024] The particle size and pH of the nano - silica sol jointly improve its stability.

[0025] According to some embodiments of the present invention, the aggregate includes at least one of quartz sand, calcium carbonate sand, crushed glass, and recycled aggregate.

[0026] According to some embodiments of the present invention, the aggregate includes crushed glass.

[0027] According to some embodiments of the present invention, the particle size of the aggregate is between 0.1 - 20 mm.

[0028] According to some embodiments of the present invention, the particle size of the aggregate is between 0.125 - 0.25 mm.

[0029] According to some embodiments of the present invention, by weight, in the raw materials for preparing the substrate, there are 50 - 55 parts of inorganic binder and 32 - 45 parts of aggregate. Specifically, the mass ratio of the inorganic binder to the aggregate is about 53:34.

[0030] According to some embodiments of the present invention, the mixing liquid includes at least one of water and water reducing agent.

[0031] According to some embodiments of the present invention, in the mixing liquid, the mass ratio of water to water reducing agent is 6.5 to 15:1.

[0032] According to some embodiments of the present invention, in the mixing liquid, the mass ratio of water to water reducing agent is 8 to 12:1. For example, it can be specifically about 10:1.

[0033] According to some embodiments of the present invention, in the mixing liquid, the mass ratio of water to water reducing agent is 6.6 to 7:1.

[0034] According to some embodiments of the present invention, the water reducing agent is a polycarboxylate water reducing agent.

[0035] According to some embodiments of the present invention, by weight, in the raw materials for preparing the substrate, it includes 50 to 55 parts of inorganic binder and 1 to 3 parts of mixing liquid. Specifically, the mass ratio of the inorganic binder to the mixing liquid is about 53:2.

[0036] According to some embodiments of the present invention, by weight, the raw materials for preparing the substrate include:

[0037]

[0038] According to some embodiments of the present invention, by weight, the raw materials for preparing the substrate include:

[0039]

[0040] According to some embodiments of the present invention, by weight, the raw materials for preparing the penetrating protective agent include:

[0041]

[0042] The penetrating protective agent can chemically react with the free alkali substances in the substrate to form crystals, thereby effectively blocking all capillary channels and cracks inside the substrate (cement-based), improving the denseness of the obtained inorganic artificial stone, and further enhancing its water resistance and stain resistance.

[0043] According to some embodiments of the present invention, the organosilicon monomer includes at least one of sodium silicate (CAS: 1344-09-8), sodium methylsilanolate (CAS: 16589-43-8), and potassium silicate (CAS: 1312-76-1).

[0044] According to some embodiments of the present invention, the pH of the nano-silica sol B is 4 to 6.

[0045] According to some embodiments of the present invention, the particle size of the nano-silica sol B is 1 to 50 nm.

[0046] According to some embodiments of the present invention, the particle size of the nano-silica sol B is 10 to 40 nm.

[0047] According to some embodiments of the present invention, the mass ratio of the organosilicon monomer to the nano-silica sol B is 20 to 30:2 to 5. For example, it can specifically be about 20:4.

[0048] According to some embodiments of the present invention, the mass ratio of the organosilicon monomer to the dispersant is 20 to 30:0.2 to 0.3. For example, it can specifically be about 20:0.2.

[0049] According to some embodiments of the present invention, the surface penetrant includes at least one of hexadecyltrimethoxysilane (CAS: 16415-12-6), dodecyltrimethoxysilane (CAS: 3069-21-4), and methyltriethoxysilane (CAS: 2031-67-6).

[0050] According to some embodiments of the present invention, the mass ratio of the organosilicon monomer to the surface penetrant is 20 to 30:2 to 3. For example, it can specifically be about 20:3.

[0051] According to some embodiments of the present invention, the raw materials for preparing the penetrant-type protective agent further include at least one of a complexing aid, an antifoaming agent, and a stabilizer.

[0052] According to some embodiments of the present invention, the complexing aid includes at least one of carboxymethyl chitosan and ethylenediaminetetraacetic acid.

[0053] According to some embodiments of the present invention, the mass ratio of the organosilicon monomer to the complexing aid is 20 to 40:0.3 to 1.

[0054] According to some embodiments of the present invention, the mass ratio of the organosilicon monomer to the complexing aid is 20 to 30:0.5 to 0.8.

[0055] According to some embodiments of the present invention, the antifoaming agent is an organosilicon antifoaming agent.

[0056] According to some embodiments of the present invention, the mass ratio of the organosilicon monomer to the antifoaming agent is 20 to 40:0.1 to 0.2.

[0057] According to some embodiments of the present invention, the mass ratio of the organosilicon monomer to the antifoaming agent is 20 to 30:0.1.

[0058] According to some embodiments of the present invention, the mass ratio of the silicone monomer to the stabilizer is 20 to 40: 0.1 to 0.3.

[0059] According to some embodiments of the present invention, the mass ratio of the silicone monomer to the stabilizer is 20 to 30: 0.1 to 0.2.

[0060] According to some embodiments of the present invention, the raw materials for preparing the penetrating protective agent further include water. The mass ratio of the silicone monomer to the water is 20 to 40: 70 to 90.

[0061] According to some embodiments of the present invention, the raw materials for preparing the penetrating protective agent further include water. The mass ratio of the silicone monomer to the water is 20 to 30: 72 to 78. For example, it can specifically be about 20:75.

[0062] According to some embodiments of the present invention, by weight, the raw materials for preparing the penetrating protective agent include:

[0063]

[0064] Thus, the penetrating protective agent will not block the pattern and surface color of the substrate itself, and will not affect the surface effect after use.

[0065] According to some embodiments of the present invention, by weight, the raw materials for preparing the penetrating protective agent include:

[0066]

[0067] According to some embodiments of the present invention, the preparation method of the penetrating protective agent includes: mixing the silicone monomer, nano-silica sol B and dispersant, and then mixing the obtained mixture with the surface penetrant again.

[0068] According to some embodiments of the present invention, the preparation method of the penetrating protective agent includes:

[0069] D1. Mix the silicone monomer, nano-silica sol B, defoamer and dispersant;

[0070] D2. Mix the mixture obtained in step D1 with the surface penetrant again;

[0071] D3. Continuously mix the mixture obtained in step D2 with the complexing aid, stabilizer and water.

[0072] According to some embodiments of the present invention, in step D1, the temperature of the mixing is 40-50°C. The duration of the mixing is 2-5 min; for example, it can be specifically about 3 min. The mixing is carried out by stirring, and the rotation speed of the stirring is 500-1000 rpm; for example, it can be specifically about 800 rpm.

[0073] According to some embodiments of the present invention, in step D2, the duration of the re-mixing is 3-10 min. For example, it can be specifically about 5 min. The method of the re-mixing is stirring, and the rotation speed of the stirring is 500-1000 rpm.

[0074] According to some embodiments of the present invention, in step D3, the duration of the continuous mixing is 8-12 min. For example, it can be specifically about 10 min. The method of the continuous mixing is stirring, and the rotation speed of the stirring is 500-1000 rpm.

[0075] According to an embodiment of the second aspect of the present invention, a method for preparing the inorganic artificial stone is provided. The preparation method includes mixing and molding the raw materials for preparing the substrate, and then applying the penetrant on the substrate within a period of 1-24 h of curing and drying.

[0076] The preparation method according to the embodiments of the present invention has at least the following beneficial effects:

[0077] The present invention has found through research that when the substrate adopts the raw materials provided by the present invention, during the open period of the pore structure, it is beneficial to the penetration of the penetrant. Therefore, the obtained inorganic artificial stone has better densification and stain resistance. That is to say, the present invention combines the raw materials for preparing the substrate and the application timing of the penetrant to achieve the technical effects of surface stain resistance, reducing the surface porosity of the inorganic artificial stone, lowering the water absorption rate, and improving the strength both internally and externally.

[0078] According to some embodiments of the present invention, the molding is carried out with the assistance of vacuum, vibration or pressing. Thus, the effects of degassing and improving densification can be achieved.

[0079] According to some embodiments of the present invention, the time of curing and drying is 3-24 h.

[0080] According to some embodiments of the present invention, the time of curing and drying is 7-12 h.

[0081] According to some embodiments of the present invention, the application method includes at least one of spraying, coating and soaking.

[0082] According to an embodiment of the third aspect of the present invention, an application of the inorganic artificial stone in the field of architectural decoration is provided.

[0083] Since the application adopts all the technical solutions of the inorganic artificial stone in the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment. That is, on the basis of having a good decorative effect, it has excellent strength and anti-... ability.

[0084] Unless otherwise specified, the "about" in the present invention actually means that the allowable error is within the range of ±2%. For example, about 100 is actually 100 ± 2% × 100.

[0085] Unless otherwise specified, "between... and..." in the present invention includes the endpoints. For example, "between 2 and 3" includes the endpoint values 2 and 3.

[0086] Other features and advantages of the present invention will be described in the following specification, and, in part, will become apparent from the specification or will be understood by practicing the present invention. Detailed Embodiments

[0087] The following will clearly and completely describe the concept and technical effects generated by the present invention in combination with embodiments to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0088] In the description of the present invention, the description of reference terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0089] Unless otherwise specified, in the detailed embodiments, the water reducing agent used is a polycarboxylate water reducing agent purchased from Guangdong Redwall New Materials Co., Ltd.;

[0090] The nano-silica sol is purchased from Linyi Kehan Silicon Products Co., Ltd.;

[0091] The defoaming agent and dispersant are purchased from Evonik.

[0092] The inorganic binder is a mixture of Portland cement (42.5) and limestone powder (particle size of 300 - 500 mesh) in a mass ratio of 7:3.

[0093] Table 1 Raw materials for preparing the substrate in Examples 1 - 5

[0094]

[0095] In Table 1, the ratio of water to water reducer is by mass.

[0096] Raw materials for preparing the penetrating protective agent used in Examples 1 - 5 of Table 2

[0097]

[0098] Example 1

[0099] An inorganic artificial stone was prepared in this example. The specific steps were as follows:

[0100] S1. Referring to the formulation ratio in Table 1, all the raw materials for preparation were mixed, vibrated, and pressed into shape to obtain a substrate.

[0101] Referring to the formulation ratio in Table 2, the organosilicon monomer, nano - silica sol B, defoamer, and dispersant were stirred at 40 - 50 °C for 3 min at a rotation speed of 800 rpm. Then, the surface penetrant was added to the obtained mixture and stirred for 5 min. After that, the complexing aid, stabilizer, and water were added and stirred for 10 min to obtain the penetrating protective agent.

[0102] In this step, the preparation of the substrate and the penetrating protective agent can be in any order as long as the application time requirement of the penetrating protective agent in step S2 can be met.

[0103] S2. The substrate obtained in step S1 was cured under the conditions of a temperature of 23 ± 2 °C and a relative humidity of 70 ± 5% for 24 hours, and then the penetrating protective agent obtained in step S1 was sprayed. Until the 28 - day age, its anti - fouling ability and strength performance were tested.

[0104] The range values involved in this example indicate that floating within this range will not affect the performance of the obtained inorganic artificial stone, and the corresponding range is the deviation caused during the normal operation of the instrument.

[0105] Example 2

[0106] An inorganic artificial stone was prepared in this example. The specific difference from Example 1 was as follows:

[0107] (1) The raw materials for preparing the substrate and the penetrating protective agent were slightly different, and the specific differences are shown in Tables 1 - 2.

[0108] (2) In step S2, it was cured for 7 h and then the penetrating protective agent obtained in step S1 was sprayed.

[0109] Example 3

[0110] An inorganic artificial stone was prepared in this example. The specific difference from Example 1 was as follows:

[0111] (1) The raw materials for preparing the substrate and the penetrating protective agent are slightly different, and the specific differences are shown in Tables 1 - 2;

[0112] (2) In step S2, after curing for 12 h, the penetrating protective agent obtained in step S1 is sprayed.

[0113] Example 4

[0114] An inorganic artificial stone was prepared in this example. The specific differences from Example 1 are as follows:

[0115] (1) The raw materials for preparing the substrate and the penetrating protective agent are slightly different, and the specific differences are shown in Tables 1 - 2.

[0116] (2) In step S2, after curing for 3 h, the penetrating protective agent obtained in step S1 (the same as in Example 1) is sprayed.

[0117] Example 5

[0118] An inorganic artificial stone was prepared in this example. The specific differences from Example 1 are as follows:

[0119] (1) The raw materials for preparing the substrate and the penetrating protective agent are slightly different, and the specific differences are shown in Tables 1 - 2;

[0120] (2) In step S2, after curing for 1 h, the penetrating protective agent obtained in step S1 (the same as in Example 1) is sprayed.

[0121] Comparative Example 1

[0122] An inorganic artificial stone was prepared in this example. The specific differences from Example 1 are as follows:

[0123] The preparation of the penetrating protective agent is not included in step S1;

[0124] In step S2, the penetrating protective agent is not sprayed, and it is directly cured for 28 days for testing.

[0125] Comparative Example 2

[0126] An inorganic artificial stone was prepared in this example. The specific differences from Example 1 are as follows:

[0127] (1) The raw materials for preparing the substrate do not include nano - silica sol A, and the mass fraction of the inorganic binder is 58 parts.

[0128] (2) The preparation of the penetrating protective agent is not included in step S1;

[0129] In step S2, the penetrating protective agent is not sprayed, and it is directly cured for 28 days for testing.

[0130] Comparative Example 3

[0131] In this embodiment, an inorganic artificial stone was prepared. The specific difference from Example 1 is as follows:

[0132] (1) The raw materials for preparing the substrate and the penetrating protective agent are the same.

[0133] (2) In step S2, after curing for 36 h, the penetrating protective agent obtained in step S1 was sprayed for testing.

[0134] In this example, the methyl violet pollution color difference, 28-day flexural strength data, and surface water absorption data of the inorganic artificial stones obtained in Examples 1 to 5 and Comparative Examples 1 to 3 were tested. Specifically, the water absorption was tested according to the method specified in GB / T 3810.3, the flexural strength was tested according to the method specified in DB44T 1100.2-2012 Test methods for artificial stones - Part 2: Determination of flexural strength, and the color difference of methyl violet pollution was tested according to the method specified in DB44-T 1601-2015. The test results are shown in Tables 3 to 4.

[0135] Table 3 Color difference and strength results of the inorganic artificial stones obtained in Examples 1 to 5 and Comparative Examples 1 to 3

[0136] Color difference before and after methylrosanilinium chloride pollution / △E Flexural strength / MPa Comparative Example 1 40 15.27 Comparative Example 2 43 15.11 Comparative Example 3 36 16.23 Example 1 15 20.84 Example 2 10 21.41 Example 3 12 21.46 Example 4 18 20.97 Example 5 35 18.71

[0137] Table 4 Surface water absorption of the inorganic artificial stones obtained in Comparative Examples 1 to 2

[0138] Surface water absorption rate at different ages / % Comparative Example 1 Comparative Example 2 1h 0.0213 0.0269 3h 0.0328 0.0341 7h 0.0425 0.0434 12h 0.0412 0.0418 24h 0.0351 0.0378

[0139] The results shown in Tables 3 to 4 indicate that through the production process of internal incorporation of nano-silica sol and spraying of penetrating protective agent within the window period of 1 to 24 h, the ability to resist methyl violet pollution has been greatly improved. When using methyl violet pollution solution for anti-fouling test, the anti-fouling effect with a color difference △E of 10 can be achieved on the surface of the artificial stone before and after pollution, and at the same time, its flexural strength has also been improved. Further, the results in Table 4 also show that regardless of whether nano-silica sol A is contained in the preparation raw materials, the pore structure of the obtained inorganic artificial stone has a trend of first expanding and then contracting with the extension of the curing time. Therefore, applying the penetrating protective agent within 1 to 24 h, especially within 7 to 12 h, can promote its full penetration into the interior of the substrate to improve the density of the inorganic artificial stone, enhance the stain resistance and mechanical strength.

[0140] Comparing Example 1 and Example 2, it can be seen that within the scope provided by the present invention, by changing the specific selection of the preparation raw materials or the application time of the penetrating protective agent, an inorganic artificial board with good stain resistance and good mechanical properties can be obtained.

[0141] Comparing Comparative Example 1 and Comparative Example 3, it can be seen that if the application time of the penetrating protective agent exceeds the range provided by the present invention, the stain resistance and strength properties of the resulting inorganic artificial stone will be significantly reduced. This also indirectly shows that as the curing time increases, the pore structure in the substrate will gradually close, and after 24 hours, the closing ratio will increase significantly, preventing the penetration of the penetrating protective agent.

[0142] Comparing Example 1 and Example 3, it can be seen that compared with 24 hours, the color difference value of the inorganic artificial stone obtained by applying the penetrating protective agent at 12 hours is better. At the same time, as the particle size of nano-silica sol A decreases, its activity is better, and the strength of the resulting inorganic artificial board is slightly improved.

[0143] Comparing Examples 1 to 5, it can be seen that the application time of the penetrating protective agent will significantly affect the stain resistance and strength properties of the resulting inorganic artificial stone. Specifically, applying it within 3 to 24 hours of curing, especially within 7 to 12 hours, has a significantly improved effect compared to applying it at 1 hour of curing.

[0144] Comparing the example and Comparative Example 1, it can be seen that if the penetrating protective agent is omitted, the stain resistance and flexural strength of the resulting inorganic artificial board will decrease significantly.

[0145] Further comparing Comparative Example 1 and Comparative Example 2, it can be seen that if the substrate does not include nano-silica sol A, the stain resistance and anti-bending strength of the substrate will be further reduced.

[0146] In summary, in the inorganic artificial board provided by the present invention, the synergistic effect of the substrate preparation raw materials and the penetrating protective agent can significantly improve its stain resistance and mechanical strength, and is expected to be widely used in the field of building decoration.

[0147] The above has described the embodiments of the present invention in detail. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge scope of those of ordinary skill in the art. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. An inorganic artificial stone, characterized in that, The inorganic artificial stone includes a substrate and a penetrating protective agent infiltrated in the substrate and covering the surface of the substrate; By weight, the preparation raw materials of the substrate include: 20 - 60 parts of an inorganic binder; 1 - 10 parts of nano-silica sol A; 30 - 80 parts of aggregate; 0.05 - 5 parts of a mixing liquid; The pH of the nano-silica sol A is 7 - 9; By weight, the preparation raw materials of the penetrating protective agent include: 20 - 40 parts of an organosilicon monomer; 1 - 10 parts of nano-silica sol B; 1 - 3 parts of a surface penetrant; 0.1 - 0.5 parts of a dispersant; The pH of the nano-silica sol B is 4 - 6; The surface penetrant includes at least one of cetyltrimethoxysilane, dodecyltrimethoxysilane, and methyltriethoxysilane; The inorganic artificial stone is prepared by a preparation method including the following steps: After mixing and molding the preparation raw materials of the substrate, the penetrating protective agent is applied within a period of 7 - 12 h of curing and drying.

2. The inorganic artificial stone according to claim 1, characterized in that, The particle size of the nano-silica sol A is 1 - 50 nm.

3. The inorganic artificial stone according to claim 1, wherein The organosilicon monomer includes at least one of sodium silicate, sodium methyl silanolate, and potassium silicate.

4. The inorganic artificial stone according to claim 1, characterized in that, The preparation raw materials of the penetrating protective agent further include at least one of a complexing aid, an antifoaming agent, and a stabilizer.

5. The inorganic artificial stone according to claim 1, characterized in that, The preparation method of the penetrating protective agent includes: after mixing the organosilicon monomer, nano-silica sol B, and the dispersant, the obtained mixture is mixed with the surface penetrant again.

6. A preparation method of the inorganic artificial stone according to any one of claims 1 to 5, characterized in that, The preparation method includes mixing and molding the preparation raw materials of the substrate, and applying the penetrating protective agent within a period of 7 - 12 h of curing and drying.

7. The application of the inorganic artificial stone according to any one of claims 1 - 5 in the field of architectural decoration.

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