Inorganic artificial stone, antifouling hardness enhancing liquid, surface treatment process and application

Abstract

The invention relates to an inorganic artificial stone, an antifouling hardness enhancing liquid, a surface treatment process and application. The antifouling hardness enhancing liquid is prepared from the following raw materials in parts by mass: 1 to 20 parts of modified powder and 50 to 300 parts of silica sol, the modified powder comprises the following components in parts by mass: 1-10 parts of a silane coupling agent and 50-300 parts of modified glass flakes; the modified glass flakes comprise glass flakes and water glass; the mass ratio of the glass flakes to the water glass is 1: (1-2). According to the scheme, the modified powder and the silica sol are mixed, and the modified powder adopts water glass and a silane coupling agent to carry out surface treatment on glass flakes, so that the binding force with the glass flakes is improved, the flexibility of a coating is enhanced, and the antifouling property and the surface hardness of the inorganic artificial stone are improved; the problem that an existing artificial stone plate produced by taking an inorganic cementing material as an adhesive is low in antifouling capacity and surface hardness is solved.

Description

Technical Field

[0001] The invention relates to the field of inorganic artificial stone, and in particular to an inorganic artificial stone, an antifouling hardness enhancing liquid, a surface treatment process and a use. Background Art

[0002] Inorganic artificial stone is a building material made of inorganic cementitious materials combined with adhesives. It is divided into inorganic artificial quartz and inorganic artificial granite according to different aggregates. Inorganic artificial stone is widely used because of its bright colors, dense structure, durability, light weight, and non-absorbent properties. Since inorganic artificial stone uses inorganic cementitious materials, although the material cost is low, its anti-fouling ability and surface hardness are low. In particular, most of the aggregates of inorganic artificial granite are calcium carbonate, and its material cost is lower than that of artificial quartz, but its anti-fouling ability and surface hardness are not perfect. If it is further processed, the material cost will increase, and the improvement of anti-fouling ability and surface hardness will be limited. Therefore, the existing inorganic artificial stone has the problem that it cannot have low cost, good anti-fouling effect and high surface hardness at the same time. Summary of the invention

[0003] The purpose of the present invention is to propose an antifouling hardness enhancing liquid for inorganic artificial stone, which mixes modified powder with silica sol. The modified powder uses water glass and silane coupling agent to surface treat glass flakes to improve the bonding force to the glass flakes and enhance the flexibility of the coating, thereby improving the antifouling performance and surface hardness of the inorganic artificial stone.

[0004] The invention also provides a method for preparing an antifouling hardness enhancing liquid for inorganic artificial stone.

[0005] The present invention also provides an inorganic artificial stone, wherein the antifouling hardness enhancing layer is formed by the antifouling hardness enhancing liquid.

[0006] The invention also proposes a use of an antifouling hardness enhancing liquid in the preparation of inorganic artificial stone.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] An antifouling hardness enhancing liquid for inorganic artificial stone, the raw materials of which include, by weight: 1-20 parts of modified powder and 50-300 parts of silica sol;

[0009] The modified powder comprises, by weight: 1-10 parts of a silane coupling agent and 50-300 parts of modified glass flakes;

[0010] The modified glass flakes include: glass flakes and water glass; the mass ratio of the glass flakes to the water glass is 1:(1-2).

[0011] Optimally, the silane coupling agent includes at least one of KH450 silane coupling agent and KH460 silane coupling agent.

[0012] Optimally, the ratio between the length and thickness of the glass flakes is (10-100):1; the thickness of the glass flakes is 1-4 μm.

[0013] Preferably, the preparation method of the modified powder comprises the following steps:

[0014] Step (1) mixing glass flakes with water glass; washing with water, filtering, ultrasonically cleaning the filter residue, and then filtering to obtain treated glass flakes;

[0015] Step (2) uniformly mix the silane coupling agent and water, then add the treated glass flakes, and let stand at room temperature under stirring; after drying and dehydration, a modified powder is obtained.

[0016] A method for preparing an antifouling hardness enhancing liquid for inorganic artificial stone, which is used to prepare the above-mentioned antifouling hardness enhancing liquid for inorganic artificial stone, comprises the following steps:

[0017] The modified powder and the silica sol are mixed while stirring, and after the mixture is evenly mixed, an antifouling hardness enhancing liquid is obtained.

[0018] An inorganic artificial stone, the surface of which is provided with a permeable layer and an antifouling hardness enhancement layer in sequence from bottom to top;

[0019] The penetration layer is formed by grinding and / or polishing after the penetrant is cured;

[0020] The antifouling hardness enhancing layer is formed by the antifouling hardness enhancing liquid of the inorganic artificial stone.

[0021] Preferably, the infiltrant comprises a lithium-based infiltrant.

[0022] A surface treatment process of inorganic artificial stone comprises the following steps:

[0023] Step (S1): applying a penetrant on the surface of the inorganic artificial stone, and grinding and / or polishing the surface after the penetrant is cured;

[0024] Step (S2): applying the above-mentioned antifouling hardness enhancing liquid for inorganic artificial stone to the surface of the inorganic artificial stone.

[0025] Preferably, in the step (S2), a roller is used to roll the antifouling hardness enhancing liquid of the inorganic artificial stone onto the surface of the inorganic artificial stone.

[0026] Use of an antifouling hardness enhancing liquid in the preparation of inorganic artificial stone, wherein the antifouling hardness enhancing liquid is the above-mentioned antifouling hardness enhancing liquid for inorganic artificial stone;

[0027] The inorganic artificial stone is inorganic artificial quartz stone or inorganic artificial granite.

[0028] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0029] The present invention provides an antifouling hardness enhancing liquid for inorganic artificial stone, which mixes modified powder with silica sol. The modified powder adopts water glass and silane coupling agent to perform surface treatment on glass flakes to improve the bonding force to the glass flakes and enhance the flexibility of the coating, thereby improving the antifouling performance and surface hardness of the inorganic artificial stone, solving the problem of low antifouling ability and surface hardness of the existing artificial stone slabs produced with inorganic gelling materials as adhesives. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The artificial granite after applying the antifouling hardness enhancing liquid in Example F;

[0031] Figure 2 This is the artificial granite in Example F before applying the antifouling hardness enhancing liquid. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] For ease of understanding of the present invention, the present invention is described more fully below. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. If no specific technology or conditions are indicated in the embodiments, the technology or conditions described in the documents in this area or the product instructions are carried out. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products that can be obtained by commercial purchase.

[0034] An antifouling hardness enhancing liquid for inorganic artificial stone, the raw materials of which include, by weight: 1-20 parts of modified powder and 50-300 parts of silica sol;

[0035] The modified powder comprises, by weight: 1-10 parts of a silane coupling agent and 50-300 parts of modified glass flakes;

[0036] The modified glass flakes include: glass flakes and water glass; the mass ratio of the glass flakes to the water glass is 1:(1-2).

[0037] The present invention provides an antifouling hardness enhancing liquid for inorganic artificial stone, which mixes modified powder with silica sol. The modified powder adopts water glass and silane coupling agent to perform surface treatment on glass flakes to improve the bonding force to the glass flakes and enhance the flexibility of the coating, thereby improving the antifouling performance and surface hardness of the inorganic artificial stone, solving the problem of low antifouling ability and surface hardness of the existing artificial stone slabs produced with inorganic gelling materials as adhesives.

[0038] Water glass is also called activated silicate glass. For example, sodium silicate water glass Na is commonly used. 2 O·nSiO 2 , and potassium silicate K 2 O·nSiO 2 . The main components of glass flakes include silicon dioxide; water glass can treat the surface of glass flakes, and the surface adhesion of glass flakes can be increased after corrosion, which can improve the surface bonding ability of glass flakes. The silanol groups generated by the hydrolysis of the alkoxy groups of the silane coupling agent are adsorbed on the treated surface of the glass flakes. The silanol groups are condensed with the hydroxyl groups on the surface of the glass flakes and connected together, thereby changing the surface structure of the glass flakes, improving the compatibility of the glass flakes with silica sol, and the modified powder obtained after treatment can increase the toughness of the coating.

[0039] Optimally, the silane coupling agent includes at least one of KH450 silane coupling agent and KH460 silane coupling agent.

[0040] The silane coupling agent of this solution can be purchased directly from the market. Among the numerous silane coupling agents, the optimal embodiment of this solution uses KH450 and KH460, which have good adhesion to the surface of glass flakes and the best effect of improving antifouling and surface hardness. In particular, the use amount of KH450 and KH460 is small, but the effect is the best, the modification cost of glass flakes is low, and the application cost of inorganic artificial stone will not be increased.

[0041] Optimally, the ratio between the length and thickness of the glass flakes is (10-100):1; the thickness of the glass flakes is 1-4 μm.

[0042] This scheme preferably uses glass flakes with a certain length-to-thickness ratio, where the length is larger than the thickness. Therefore, the glass flakes as a whole extend laterally. The glass flakes are likely to be laid horizontally on the coating, which can increase the utilization rate of the glass flakes in the coating and thus improve the surface hardness of the coating in terms of morphology.

[0043] Preferably, the preparation method of the modified powder comprises the following steps:

[0044] Step (1) mixing glass flakes with water glass; washing with water, filtering, taking the filter residue for ultrasonic cleaning, and then filtering to obtain the treated glass flakes;

[0045] After the glass flakes in this scheme are mixed with water glass, water is added to rinse the glass flakes, mainly to remove the residual water glass on the surface of the glass flakes. The number of rinses can be determined according to needs. At the same time, the glass flakes during or after rinsing are filtered to obtain a filtrate to remove the rinse. This scheme also ultrasonically cleans the filter residue to thoroughly remove the water glass on the surface of the glass flakes, so as to prevent the residual water glass from affecting the subsequent coating performance.

[0046] Step (2) uniformly mix the silane coupling agent and water, then add the treated glass flakes, and let stand at room temperature under stirring; after drying and dehydration, a modified powder is obtained.

[0047] After the silane coupling agent is prepared into an aqueous solution, the silane coupling agent can be easily diluted. Since the amount of silane coupling agent used in this scheme is relatively small, the prepared water can be dried and removed in the subsequent process without affecting the coating.

[0048] A method for preparing an antifouling hardness enhancing liquid for inorganic artificial stone, which is used to prepare an antifouling hardness enhancing liquid for inorganic artificial stone according to any of the above embodiments, comprises the following steps:

[0049] The modified powder and the silica sol are mixed while stirring, and after the mixture is evenly mixed, an antifouling hardness enhancing liquid is obtained.

[0050] The preparation method of the antifouling hardness enhancing liquid of the present scheme is simple, and only requires the modified powder and the silica sol to be mixed evenly while stirring. The preparation cost is low and will not lead to an increase in the cost of inorganic artificial stone.

[0051] An inorganic artificial stone, the surface of which is provided with a permeable layer and an antifouling hardness enhancement layer in sequence from bottom to top;

[0052] The penetration layer is formed by grinding and / or polishing after the penetrant is cured;

[0053] The antifouling hardness enhancing layer is formed by an antifouling hardness enhancing liquid of an inorganic artificial stone according to any of the above embodiments.

[0054] In this solution, it is preferred to apply a penetrant on the surface of the inorganic artificial stone before applying the antifouling hardness enhancement liquid. The penetrant forms a permeation layer after solidification. The penetrant can be purchased from the market. Generally, it has a permeation effect and can react with the surface of the inorganic artificial stone. After solidification, it forms a solid structure, which can block the holes, seams, gaps and other hollow structures on the surface of the inorganic artificial stone to avoid small molecules or impurities remaining in the hollow structure, thereby improving the flatness of the surface of the inorganic artificial stone. After the permeation layer is formed in this solution, grinding, polishing, or grinding and polishing can be performed in sequence as needed, which can make the surface of the permeation layer smoother, eliminate the uneven parts of the original surface, and provide the best attachment surface for the subsequent application of the antifouling hardness enhancement liquid.

[0055] Preferably, the infiltrant comprises a lithium-based infiltrant.

[0056] The best embodiment of this scheme uses a lithium-based penetrant, whose weak alkaline properties can effectively avoid the problem of coating efflorescence. At the same time, the lithium-based penetrant has stronger penetration than conventional penetrants, blocks smaller connecting holes, reduces the holes on the surface of the plate, and thus avoids the formation of pinholes when rolling the coating on the surface, which affects the antifouling effect and decorative effect, and has the best performance in all aspects. Combined with the fact that the penetrant layer will be ground and / or polished after solidification, the risk of efflorescence is minimized.

[0057] A surface treatment process of inorganic artificial stone comprises the following steps:

[0058] Step (S1): applying a penetrant on the surface of the inorganic artificial stone, and grinding and / or polishing the surface after the penetrant is cured;

[0059] In step (S1), after the penetrant is cured, the penetrant is continuously applied and cured, which can be repeated at least once. The application of the penetrant can be repeated several times as needed to ensure the best penetration effect and to ensure that the penetrant layer is not easily damaged during subsequent grinding and / or polishing.

[0060] Step (S2): applying an antifouling hardness enhancing liquid for inorganic artificial stone according to any of the above embodiments to the surface of the inorganic artificial stone.

[0061] This scheme uses anti-fouling hardness enhancing liquid to be rolled onto the surface of inorganic artificial stone, which can spread the modified glass flakes of the anti-fouling hardness enhancing liquid horizontally as much as possible, thereby improving the utilization rate of the glass flakes to increase the surface hardness of the coating; especially when selecting materials, strictly selecting glass flakes with a length to thickness ratio of (10~50):1 can further improve the surface hardness of the coating.

[0062] In addition, this solution will polish the cured penetrant before applying the antifouling hardness enhancing liquid, so polishing can improve the glossiness to a certain extent, and the antifouling hardness enhancing liquid will not affect the color and texture of the blank after application. Furthermore, the surface treatment process directly acts on the surface of the finished inorganic artificial stone, which is not a necessary process during the preparation of inorganic artificial stone, and the process steps are simple. In this way, this solution can keep the inorganic artificial stone at a low cost and improve the antifouling and antifouling properties (and glossiness) of the inorganic artificial stone.

[0063] Preferably, in the step (S2), a roller is used to roll the antifouling hardness enhancing liquid of the inorganic artificial stone onto the surface of the inorganic artificial stone.

[0064] Use of an antifouling hardness enhancing liquid in the preparation of an inorganic artificial stone, wherein the antifouling hardness enhancing liquid is an antifouling hardness enhancing liquid for an inorganic artificial stone according to any of the above embodiments;

[0065] The inorganic artificial stone is inorganic artificial quartz stone or inorganic artificial granite.

[0066] The performance tests involved in the following embodiments are:

[0067] Antifouling: Use an oil pen to smear on the surface of the board, let it stand for 10 minutes, and then wipe it with a paper towel; if the surface of the board can be easily wiped clean without leaving any marks, it is qualified; otherwise, it is unqualified.

[0068] Surface hardness: Use the scratch test method to test the surface hardness of the board surface.

[0069] Glossiness: Use a gloss meter to test the glossiness of the board.

[0070] This scheme takes the artificial granite type of inorganic artificial stone as an example as the plate body of the following embodiments and comparative examples.

[0071] Example A includes Examples A1-A3 and Comparative Example A.

[0072] Embodiment A1:

[0073] Preparation method of antifouling hardness enhancing liquid:

[0074] (1) Mix glass flakes and water glass at a mass ratio of 1:1.5 at 45°C for 30 minutes; rinse with water, filter, take the filter residue and clean it at an ultrasonic frequency of 21kHz for 2 minutes, and then filter to obtain the treated glass flakes, and repeat the process twice;

[0075] The length of the glass flakes is selected to be 30-100 μm and the thickness is 1-3 μm;

[0076] (2) Mix 3 parts of silane coupling agent and 100 parts of water by weight, add 100 parts of treated glass flakes, and let stand for 1 hour at room temperature under stirring; dry and dehydrate at 80° C. to obtain modified powder; the silane coupling agent is a mixture of KH450 silane coupling agent and KH460 silane coupling agent in a mass ratio of 1:1;

[0077] (3) The modified powder and silica sol are dispersed and stirred in a disperser for 3 hours, and the antifouling hardness enhancing liquid is obtained after being evenly mixed; the antifouling hardness enhancing liquid comprises, by weight, 5 parts of the modified powder and 100 parts of the silica sol.

[0078] The surface treatment process of artificial granite includes the following steps:

[0079] Step (S1): applying a lithium-based penetrant on the surface of the artificial granite, and curing the lithium-based penetrant, repeating once; and polishing;

[0080] Step (S2): Use a roller to roll the above antifouling hardness enhancement liquid onto the surface of the artificial granite.

[0081] Embodiment A2:

[0082] The basic steps of Example A2 are substantially the same as those of Example A1, except that in step (1), the length of the glass flakes is 4 to 5 μm; and the thickness of the glass flakes is 2 to 3 μm.

[0083] Embodiment A3:

[0084] The basic steps of Example A3 are substantially the same as those of Example A1, except that in step (S1), a polyether penetrant is selected.

[0085] Comparative Example A:

[0086] The glass flakes and silica sol are dispersed and stirred in a disperser for 3 hours, and after being evenly mixed, a glass flake mixed solution is obtained; the glass flake mixed solution, by mass, comprises: 5 parts of glass flakes and 100 parts of silica sol. The glass flake mixed solution replaces the antifouling hardness enhancing solution in step (S2) of Example A1.

[0087] The performance of Examples A1-A3 was tested as shown in Table 1 below.

[0088] Table 1 - Performance test results of Example A

[0089] Experimental Group Antifouling Surface hardness Example A1 qualified 8H Example A2 qualified 6H Example A3 qualified 7H Comparative Example A Failure 4H

[0090] illustrate:

[0091] 1. From the comparison between Example A1 and Comparative Example A, it can be seen that Comparative Example A directly mixes glass flakes and silica sol, and the glass flakes of Comparative Example A are not surface treated, and have poor binding ability with silica sol, and the silica sol cannot be adsorbed on the surface of the glass flakes, and connecting bonds cannot be formed, thereby failing to increase the toughness of the coating; while the water glass of Example A1 can treat the surface of the glass flakes, and the surface adhesion of the glass flakes can be increased after corrosion, and the surface binding ability of the glass flakes can be improved, thereby changing the surface structure of the glass flakes, and the compatibility of the glass flakes with silica sol is improved, and the modified powder obtained after treatment can increase the toughness of the coating; thus, it is explained that the modified powder of this scheme can improve the anti-fouling property and surface hardness of the coating.

[0092] 2. From the comparison between Example A1 and Example A2, it can be seen that the length of the glass flakes used in Example A2 is 4-5 μm; the thickness of the glass flakes is 2-3 μm, and the ratio of length to thickness is close to 1:1, so the difference between length and thickness is small, that is, the lateral span of the glass flakes is small; while the length of the glass flakes in Example A1 is selected to be 30-100 μm, the thickness is 1-3 μm, and the ratio of length to thickness is close to (10-100): 1. The glass flakes in Example A1 are extended laterally as a whole, and the glass flakes can be laid horizontally on the coating, which can improve the utilization rate of the glass flakes in the coating, thereby improving the surface hardness of the coating in terms of morphology. In this way, the surface hardness of Example A1 is 8H, which is 2H higher than 6H of Example A2. It is explained that when the ratio between the length and thickness of the glass flakes is controlled within a specific range so that the glass flakes are extended laterally as a whole, the surface hardness of the coating can be improved.

[0093] 3. From the comparison between Example A1 and Example A3, it can be seen that Example A3 uses a polyether penetrant instead of the lithium-based penetrant in Example A1; and the surface hardness of Example A1 can reach 8H; while the surface hardness of Example A3 is 7H. Although it is a preferred embodiment, the surface hardness improvement range of Example A3 is relatively small; this is because the lithium-based penetrant in Example A1 has strong penetration in artificial granite, and after repeated application and curing, it has a good filling effect on the artificial granite, so the surface of the penetration layer is smoother, eliminating the uneven parts of the original surface, providing the best adhesion surface for the subsequent application of antifouling hardness enhancement liquid, thereby improving the surface hardness of the coating.

[0094] Embodiment B: includes Embodiments B1-B3;

[0095] Embodiment B1:

[0096] The basic steps of Example B1 are substantially the same as those of Example A1, except that in step (2), the silane coupling agent selected is KH450 silane coupling agent.

[0097] Embodiment B2:

[0098] The basic steps of Example B2 are substantially the same as those of Example A1, except that in step (2), the silane coupling agent selected is KH460 silane coupling agent.

[0099] Embodiment B3:

[0100] The basic steps of Example B3 are substantially the same as those of Example A1, except that in step (2), the silane coupling agent selected is KH560 silane coupling agent.

[0101] The performance of Example B was tested, as shown in Table 2 below.

[0102] Table 2 - Performance test results of Example B

[0103] Experimental Group Antifouling Surface hardness Example B1 qualified 7H Example B2 qualified 7H Example B3 qualified 6H Example A1 qualified 8H

[0104] illustrate:

[0105] 1. By comparing Example A1, Example B1 and Example B2, it can be seen that Example B1 only uses KH450 silane coupling agent to attach to the surface of glass flakes, and Example B2 only uses KH460 silane coupling agent to attach to the surface of glass flakes. The surface hardness of Examples B1 and B2 is 7H, which is a better example; and the best example A1 of this scheme is to use KH450 silane coupling agent and KH460 silane coupling agent at the same time, which has the best hardness performance when attached to the surface of glass flakes at the same time. The surface hardness of Example A1 is 8H, so the comprehensive performance of anti-fouling and surface hardness improvement effect is the best.

[0106] 2. By comparing Example B3 with Examples B1 and B2, it can be seen that the silane coupling agent of Example B3 is KH560 silane coupling agent, and its surface hardness is 6H. Although both can improve the surface hardness, it is a better example; while the silane coupling agent of Example B1 or Example B2 is KH450 silane coupling agent or KH460 silane coupling agent, its surface hardness can be 7H. Obviously, the silane coupling agent of the present application is KH450 silane coupling agent or KH460 silane coupling agent, which has the best effect on improving the surface hardness of the coating.

[0107] Embodiment C: comprising Embodiments C1-C2;

[0108] Example C1:

[0109] The basic steps of Example C1 are substantially the same as those of Example A1, except that in step (S2), the antifouling hardness enhancing liquid is sprayed onto the surface of the artificial granite.

[0110] Example C2:

[0111] The basic steps of Example C2 are substantially the same as those of Example A1, except that in step (S2), the antifouling hardness enhancing liquid is applied to the surface of the artificial granite with a brush.

[0112] The performance of Example C was tested, as shown in Table 3 below.

[0113] Table 3 - Performance test results of Example C

[0114] Experimental Group Antifouling Surface hardness Example C1 qualified 5H Example C2 qualified 6H Example A1 qualified 8H

[0115] illustrate:

[0116] 1. By comparing Example C1 with Example A1, it can be seen that Example C1 uses a spraying method to apply the antifouling hardness enhancing liquid to the surface of artificial granite, while Example A1 uses a roller to roll the above antifouling hardness enhancing liquid onto the surface of artificial granite; and in Example A1, the length of the glass flakes is selected to be 30-100μm, the thickness is 1-3μm, and the length and thickness ratio of the glass flakes is (10-100): 1, that is, the glass flakes are extended laterally; and when Example A1 uses a roller for rolling, the glass flakes are most likely to be laid horizontally on the coating, which can improve the utilization rate of the glass flakes in the coating, thereby improving the surface hardness of the coating in terms of morphology. At the same time, the roller also has a certain weight, which can be pressed on the surface of artificial granite, so that lateral and vertical forces will be applied during coating, so that the glass flakes can be fully attached to the surface of artificial granite, thereby improving the surface hardness of the coating, and the surface hardness can reach the optimal 8H. However, in embodiment C1, spraying is only performed, and the glass flakes are not subjected to the tendency of lateral and vertical movement, thus failing to utilize the shape advantage of the glass flakes. As a result, the surface hardness is relatively low, being only 5H, and is an entry-level embodiment.

[0117] 2. By comparing Example C2 with Example C1, it can be seen that Example C2 is to apply the antifouling hardness enhancing liquid to the surface of artificial granite by brushing. During the brushing process, the brush will move a short distance horizontally, so there is a probability that it will be horizontally spread on the coating during the brushing process. Therefore, the surface hardness of Example C2 is higher than that of Example C1, which is 6H; however, the brush bristles are soft, the horizontal range of movement of the glass flakes is limited, and there is no vertical pressure applied, so the area of ​​the glass flakes horizontally spread is smaller than that of Example A1. It is explained that this scheme uses the antifouling hardness enhancing liquid to roll onto the surface of artificial granite, which can horizontally spread the modified glass flakes of the antifouling hardness enhancing liquid as much as possible, improve the utilization rate of the glass flakes to increase the surface hardness of the coating; especially when selecting materials, strictly selecting glass flakes with a length-to-thickness ratio of (10-50):1 can further improve the surface hardness of the coating.

[0118] Embodiment D:

[0119] Preparation method of antifouling hardness enhancing liquid:

[0120] (1) Mix glass flakes and water glass at a mass ratio of 1:1 at 50°C for 20 minutes; rinse with water, filter, take the filter residue and clean it at a frequency of 20kHz for 3 minutes, and then filter to obtain the treated glass flakes, and repeat the process 3 times;

[0121] The length of the glass flakes is selected to be 50-100 μm and the thickness is 2-4 μm;

[0122] (2) Mix 3 parts of silane coupling agent and 100 parts of water by weight, add 300 parts of treated glass flakes, and let stand for 1.5 hours at room temperature under stirring; dry and dehydrate at 70° C. to obtain a modified powder; the silane coupling agent is KH450 silane coupling agent;

[0123] (3) Dispersing and stirring the modified powder and silica sol in a disperser for 2 hours, and obtaining an antifouling hardness enhancing liquid after uniform mixing; the antifouling hardness enhancing liquid comprises, by weight, 1 part of the modified powder and 50 parts of silica sol.

[0124] The surface treatment process of artificial granite includes the following steps:

[0125] Step (S1): applying a lithium-based penetrant on the surface of the artificial granite, and curing the lithium-based penetrant, repeating twice; and polishing;

[0126] Step (S2): Use a roller to roll the above antifouling hardness enhancement liquid onto the surface of the artificial granite.

[0127] Embodiment E:

[0128] Preparation method of antifouling hardness enhancing liquid:

[0129] (1) Mix glass flakes and water glass at a mass ratio of 1:2 at 50°C for 20 minutes; rinse with water, filter, take the filter residue and clean it with ultrasound at a frequency of 23 kHz for 7 minutes, and then filter to obtain the treated glass flakes, and repeat the process 3 times;

[0130] The length of the glass flakes is selected to be 30-100 μm and the thickness is 2-3 μm;

[0131] (2) 3 parts of silane coupling agent and 100 parts of water were mixed uniformly by weight, and then 300 parts of treated glass flakes were added, and the mixture was allowed to stand for 1 hour at room temperature under stirring; the mixture was dried and dehydrated at 60° C. to obtain a modified powder; the silane coupling agent was KH460 silane coupling agent;

[0132] (3) The modified powder and silica sol are dispersed and stirred in a disperser for 1 hour, and the antifouling hardness enhancing liquid is obtained after being evenly mixed; the antifouling hardness enhancing liquid comprises, by weight, 1 part of the modified powder and 300 parts of the silica sol.

[0133] The surface treatment process of artificial granite includes the following steps:

[0134] Step (S1): applying a lithium-based penetrant on the surface of the artificial granite, and solidifying the lithium-based penetrant; and polishing;

[0135] Step (S2): Use a roller to roll the above antifouling hardness enhancement liquid onto the surface of the artificial granite.

[0136] Embodiment F:

[0137] Preparation method of antifouling hardness enhancing liquid:

[0138] (1) Mix glass flakes and water glass at a mass ratio of 1:1.5 at 45°C for 30 minutes; rinse with water, filter, take the filter residue and clean it at an ultrasonic frequency of 21kHz for 2 minutes, and then filter to obtain the treated glass flakes, and repeat the process twice;

[0139] The length of the glass flakes is selected to be 30-100 μm and the thickness is 1-3 μm;

[0140] (2) Mix 3 parts of silane coupling agent and 100 parts of water by weight, add 100 parts of treated glass flakes, and let stand for 1 hour at room temperature under stirring; dry and dehydrate at 80° C. to obtain modified powder; the silane coupling agent is a mixture of KH450 silane coupling agent and KH460 silane coupling agent in a mass ratio of 1:1;

[0141] (3) The modified powder and silica sol are dispersed and stirred in a disperser for 3 hours, and the antifouling hardness enhancing liquid is obtained after being evenly mixed; the antifouling hardness enhancing liquid comprises, by weight, 5 parts of the modified powder and 100 parts of the silica sol.

[0142] The surface treatment process of artificial granite includes the following steps:

[0143] Step (S1): applying a lithium-based penetrant on the surface of the artificial granite, and the lithium-based penetrant is cured, and the process is repeated once; grinding and polishing are performed;

[0144] Step (S2): Use a roller to roll the above antifouling hardness enhancement liquid onto the surface of the artificial granite.

[0145] The performance of Examples DF was tested as shown in Table 4 below.

[0146] Table 4 - Performance test results of Examples DF

[0147] Experimental Group Antifouling Surface hardness Glossiness Example D qualified 7H 33° Example E qualified 7H 32° Example F qualified 8H 33°

[0148] Figure 2 This is the artificial granite before applying the antifouling hardness enhancing liquid in Example F. Figure 1 This is the artificial granite after applying the antifouling hardness enhancing liquid in Example F; obviously, the solidified penetrant is polished, so polishing can improve the glossiness to a certain extent (5-10° before polishing), and the antifouling hardness enhancing liquid does not affect the color and texture of the blank after coating. Glass flakes and water glass have high light transmittance, and do not affect the color and texture of the substrate after coating.

[0149] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An antifouling hardness enhancing liquid for inorganic artificial stone, characterized in that: The raw materials include, by weight: 1-20 parts of modified powder and 50-300 parts of silica sol; The modified powder comprises, by weight: 1-10 parts of a silane coupling agent and 50-300 parts of modified glass flakes; The modified glass flakes include: glass flakes and water glass; the mass ratio of the glass flakes to the water glass is 1:(1-2).

2. The antifouling hardness enhancing liquid for inorganic artificial stone according to claim 1, characterized in that: The silane coupling agent includes at least one of KH450 silane coupling agent and KH460 silane coupling agent.

3. The antifouling hardness enhancing liquid for inorganic artificial stone according to claim 1, characterized in that: The ratio between the length and thickness of the glass flakes is (10-100):1; the thickness of the glass flakes is 1-4 μm.

4. The antifouling hardness enhancing liquid for inorganic artificial stone according to any one of claims 1 to 3, characterized in that: The preparation method of the modified powder comprises the following steps: Step (1) mixing glass flakes with water glass; washing with water, filtering, ultrasonically cleaning the filter residue, and then filtering to obtain treated glass flakes; Step (2) uniformly mix the silane coupling agent and water, then add the treated glass flakes, and let stand at room temperature under stirring; after drying and dehydration, a modified powder is obtained.

5. A method for preparing an antifouling hardness enhancing liquid for inorganic artificial stone, used for preparing an antifouling hardness enhancing liquid for inorganic artificial stone according to any one of claims 1 to 4, characterized in that: The following steps are involved: The modified powder and the silica sol are mixed while stirring, and after the mixture is evenly mixed, an antifouling hardness enhancing liquid is obtained.

6. An inorganic artificial stone, characterized in that: The surface is provided with a permeable layer and an antifouling hardness enhancement layer in sequence from bottom to top; The penetration layer is formed by grinding and / or polishing after the penetrant is cured; The antifouling hardness enhancing layer is formed by the antifouling hardness enhancing liquid for inorganic artificial stone according to any one of claims 1 to 4.

7. The inorganic artificial stone according to claim 6, characterized in that: The infiltrant includes a lithium-based infiltrant.

8. A surface treatment process for inorganic artificial stone, characterized in that: The following steps are involved: Step (S1): applying a penetrant on the surface of the inorganic artificial stone, and grinding and / or polishing the surface after the penetrant is cured; Step (S2): applying the antifouling hardness enhancing liquid for inorganic artificial stone according to any one of claims 1 to 4 to the surface of the inorganic artificial stone.

9. The surface treatment process of inorganic artificial stone according to claim 8, characterized in that: In the step (S2), a roller is used to roll the antifouling hardness enhancing liquid of the inorganic artificial stone onto the surface of the inorganic artificial stone.

10. Use of an antifouling hardness enhancing liquid in the preparation of inorganic artificial stone, characterized in that: The antifouling hardness enhancing liquid is an antifouling hardness enhancing liquid for inorganic artificial stone as claimed in any one of claims 1 to 4; The inorganic artificial stone is inorganic artificial quartz stone or inorganic artificial granite.

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