A soft-throwing, stain-resistant material and methods of use thereof

Abstract

This invention relates to the field of ceramic cold working technology, specifically to a stain-resistant material for soft-polished bricks and its application method. The stain-resistant material comprises modified high-modulus potassium silicate, a nanoparticle dispersion, and a matting material. The mass ratio of the modified high-modulus potassium silicate, the nanoparticle dispersion, and the matting material is (6-8):(1-3):(0.2-0.6). The modified high-modulus potassium silicate is obtained by modification with a silane coupling agent or organosilicon. The nanoparticle dispersion contains nanorod-shaped zinc oxide, additives, and water. The mass ratio of the nanorod-shaped zinc oxide, additives, and water is (20-30):(1-3):(50-60). The matting material is one or more of fumed silica and organic polymethyl urea resin nanospheres, addressing the current problems of poor stain resistance, insufficient stain resistance durability, and inadequate soft-light effect in soft-polished bricks.

Description

Technical Field

[0001] This invention relates to the field of ceramic cold working technology, and in particular to a soft-polished brick anti-fouling material and its application method. Background Technology

[0002] After polishing, the surface of a ceramic tile will typically have a number of open pores. These pores are mostly distributed between a few micrometers and tens of micrometers in diameter. There are also a large number of micro-scale "grooves" of varying depths, sizes, and shapes. These surface defects are the root cause of dirt accumulation on ceramic tiles in daily life.

[0003] Existing anti-fouling treatment technologies for soft-polished tiles, due to the requirement of a soft gloss surface, cannot use silica sol substances and silicone oil-based anti-fouling waxes like those used for fully polished glazed tiles. This is because the gloss of silica sol substances is significantly improved after polishing, reaching up to 90 degrees. Therefore, only oil-based anti-fouling waxes similar to silicone oils are generally used for surface treatment. However, this silicone oil-based anti-fouling material will gradually lose its anti-fouling and waterproofing properties after wax removal or prolonged friction and cleaning, resulting in a decrease in the anti-fouling ability of the tile glaze. Summary of the Invention

[0004] To address the aforementioned shortcomings, the present invention aims to propose a non-fouling material for soft-polished bricks, thereby solving the problems of poor non-fouling performance, insufficient non-fouling durability, and inadequate soft-light effect of current soft-polished bricks.

[0005] The second objective of this invention is to provide a method for using a stain-resistant material for soft-polished bricks, ensuring that the stain-resistant material can be applied effectively to the surface of the soft-polished bricks, and ensuring that the stain-resistant effect, the light-diffusing effect, and the stain-resistant durability meet the requirements.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A soft-polished brick antifouling material includes modified high-modulus potassium silicate, nanoparticle dispersion, and matting material;

[0008] The mass ratio of the modified high-modulus potassium silicate, the nanoparticle dispersion, and the matting material is (6-8):(1-3):(0.2-0.6).

[0009] The modified high-modulus potassium silicate is obtained by modification with a silane coupling agent or organosilicon, and the molar ratio n of SiO2 to K2O in the modified high-modulus potassium silicate is 5.7-5.9.

[0010] The nanoparticle dispersion comprises nanorod-shaped zinc oxide, additives, and water; wherein the mass ratio of nanorod-shaped zinc oxide, additives, and water is (20-30):(1-3):(50-60).

[0011] The matting material is one or more of fumed silica and organic polymethyl urea resin nanospheres. When both fumed silica and organic polymethyl urea resin nanospheres are present, fumed silica should be added first, followed by organic polymethyl urea resin nanospheres.

[0012] Preferably, the modified high-modulus potassium silicate has a pH value of 10-12 and a solid content of 15-20%.

[0013] Preferably, the nanorod-shaped zinc oxide has a particle size of no more than 20 nm, and the particle diameter in the dispersed state is 120-180 nm.

[0014] Preferably, the additives include dispersants, defoamers, film-forming aids, and coupling agents;

[0015] The dispersant is an anionic surfactant, the defoamer is an organosilicon defoamer, and the film-forming aid has a viscosity of 3-7 mPa·s.

[0016] Preferably, the surface antifouling material is also included, which comprises siloxanes and silane-based materials and a catalyst, wherein the mass ratio of the siloxanes and silane-based materials to the catalyst is 100:(0.5-1.5).

[0017] Preferably, the siloxane and silane material are one or more mixed oligomers selected from methylsiloxane, methyltriethoxysilane and triacetoxysilane, and the solid content of the siloxane and silane material is 38-42%;

[0018] The catalyst is dibutyltin dilaurate.

[0019] A method for using a soft-polished brick anti-fouling material includes the following steps:

[0020] S1. Polish the tiles to a gloss level of 18-25° and keep the surface dry;

[0021] S2. The modified high-modulus potassium silicate, nanoparticle dispersion and matting material are mixed in the formula amount to obtain soft polished brick antifouling material;

[0022] S3. Apply the anti-fouling material for polished tiles to the tile surface using a waxing machine and a fiber pad, and let it dry.

[0023] A method for using a soft-polished brick anti-fouling material includes the following steps:

[0024] S1. Polish the tiles to a gloss level of 18-25° and keep the surface dry;

[0025] S2. Mix the modified high-modulus potassium silicate, nanoparticle dispersion and matting material in the formula amount to obtain the bottom antifouling material, and mix the siloxane and silane materials and catalyst in the formula amount to obtain the top antifouling material.

[0026] S3. Use a waxing machine and a fiber pad to apply a base stain-resistant material to the tile surface;

[0027] S4. After the bottom anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top anti-fouling material.

[0028] Preferably, in step S3, the revolution speed of the polishing disc of the waxing machine is 100-120 r / min, the rotation speed of the abrasive installed on the polishing disc is 1200-1400 r / min, and the pressure of the polishing head is 5-8 kg.

[0029] The technical solution provided by this invention may include the following beneficial effects:

[0030] This technical solution involves adding modified high-modulus potassium silicate, nano-rod-shaped zinc oxide particle dispersion, and matting material in appropriate mass ratios. The nano-rod-shaped zinc oxide and the matting material are combined to improve the matting effect while ensuring a high pore filling rate. The modified high-modulus potassium silicate is obtained by modifying silane coupling agents or organosilicon, and has good chemical stability and adhesion. The modified high-modulus potassium silicate and the nano-rod-shaped zinc oxide particle dispersion are well bonded to the brick surface and are not easy to fall off, thus improving the stain resistance and durability. Attached Figure Description

[0031] Figure 1 This is a SEM image of a soft-polished brick without anti-fouling material treatment.

[0032] Figure 2 This is a SEM image of the soft-polished brick after anti-fouling treatment according to Embodiment 1 of the present invention. Detailed Implementation

[0033] The technical solution of the present invention will be further illustrated below through specific embodiments.

[0034] To facilitate understanding of the present invention, a more complete description is provided below. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0035] Where specific techniques or conditions are not specified in the examples, they shall be performed in accordance with the techniques or conditions described in the literature in this field or in accordance with the product instructions. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0036] A soft-polished brick antifouling material includes modified high-modulus potassium silicate, nanoparticle dispersion, and matting material;

[0037] The mass ratio of the modified high-modulus potassium silicate, the nanoparticle dispersion, and the matting material is (6-8):(1-3):(0.2-0.6).

[0038] The modified high-modulus potassium silicate is obtained by modification with a silane coupling agent or organosilicon, and the molar ratio n of SiO2 to K2O in the modified high-modulus potassium silicate is 5.7-5.9.

[0039] The nanoparticle dispersion comprises nanorod-shaped zinc oxide, additives, and water; wherein the mass ratio of nanorod-shaped zinc oxide, additives, and water is (20-30):(1-3):(50-60).

[0040] The matting material is one or more of fumed silica and organic polymethyl urea resin nanospheres. When both fumed silica and organic polymethyl urea resin nanospheres are present, fumed silica should be added first, followed by organic polymethyl urea resin nanospheres.

[0041] To address the problems existing in the prior art, this invention proposes a soft-polished brick antifouling material, comprising modified high-modulus potassium silicate, nanoparticle dispersion, and matting material, which serves as the bottom antifouling material in specific applications. Existing antifouling materials generally use silica sol to bond with ceramic tile substrates. However, silica sol requires high pressure to generate significant friction for polishing and filling pores, typically 1-3 MPa, to ensure uniform coating. This can cause some wear on the tile surface, and the gloss level increases after high-pressure polishing. The modified high-modulus potassium silicate used in this invention is obtained by modifying silane coupling agents and organosilicon. The modified high-modulus potassium silicate has excellent weather resistance, enhanced adhesion, fast film formation, and scrub resistance. Unlike silica sol, it does not require high-pressure polishing and filling of pores. Furthermore, the modified high-modulus potassium silicate has improved adhesion, is not easily removed, and has a more durable antifouling effect and chemical stability, thus improving durability. At the same time, the modified high-modulus potassium silicate contains less free K2O (alkaline component), has a higher degree of silicate polymerization, and forms a dense silicate network, which extends the acid erosion path and has better chemical stability, further improving antifouling durability. Meanwhile, the nanoparticles used in the nanoparticle dispersion of this invention are rod-shaped zinc oxide nanoparticles. To ensure antifouling performance, it is necessary to fill open pores and micro-sized grooves to guarantee the antifouling effect. Rod-shaped zinc oxide nanoparticles can effectively fill these surface defects. Furthermore, the rod-shaped zinc oxide nanoparticles undergo Mie scattering of visible and ultraviolet light. In a randomly oriented aggregate of rod-shaped zinc oxide, longer rods increase the number of times light is scattered within the material. Therefore, rod-shaped zinc oxide nanoparticles possess a certain degree of matting effect. However, when combined with matting materials, which only possess a single matting effect and exhibit good matting performance when applied to coatings, their matting effect is limited when used as a filler material in the antifouling process of pressure polishing. Therefore, using a combination of rod-shaped zinc oxide nanoparticles and matting materials can better achieve the desired effect. To balance the seemingly contradictory issues of high porosity and low gloss, the antifouling material proposed in this invention comprises modified high-modulus potassium silicate, a nano-rod-shaped zinc oxide dispersion, and a matting material. The nano-rod-shaped zinc oxide fills surface defects, ensuring antifouling effectiveness, while its combination with the matting material achieves low gloss. Furthermore, the combination of the nano-rod-shaped zinc oxide and modified high-modulus potassium silicate better fills surface defects, allowing the antifouling material to adhere well to the brick surface without requiring high-pressure polishing to fill pores, further ensuring a soft-gloss effect. This results in a gloss level of no more than 45° for soft-polished bricks treated with this antifouling material, while also improving the durability of the antifouling performance, making it less prone to detachment from the brick surface. This addresses the problems of poor antifouling performance, insufficient durability, and inadequate soft-gloss effect in current soft-polished bricks. In addition, the nano-rod-shaped zinc oxide also possesses antibacterial properties, inhibiting bacterial growth and reproduction on the brick surface.

[0042] The mass ratio of the modified high-modulus potassium silicate, nanoparticle dispersion, and matting material is (6-8):(1-3):(0.2-0.6). This ratio ensures the overall consistency of the anti-fouling material is moderate, effectively reducing the probability of wax burning while maintaining a good matting effect. It is worth noting that wax burning refers to the problem of abnormal damage, discoloration, cracking, or "burnt" marks on the surface anti-fouling layer of ceramic tiles during the anti-fouling treatment process due to improper use of the anti-fouling material or environmental factors. Essentially, it is the destruction of the stability of the anti-fouling material.

[0043] Specifically, the modified high-modulus potassium silicate can be purchased from Anhui Sibao Xiangfei Organosilicon New Materials Co., Ltd., Linyi Zhixuan New Materials Co., Ltd., or Anhui Cima New Materials Technology Co., Ltd.

[0044] Specifically, the molar ratio n of SiO2 to K2O is the modulus. The modulus range of the modified high-modulus potassium silicate is 5.7-5.9. Within this modulus range, it can effectively improve chemical stability and acid resistance, and the process is not too complicated, and it is relatively stable and not easy to gel.

[0045] Specifically, at this mass ratio, the nanoparticle dispersion has stable dispersibility because too many nanorod-shaped zinc oxide particles are prone to agglomeration, while too few will not be able to fill pores and extinct the light. At this mass ratio, it can be ensured that the nanoparticle dispersion can better play the role of filling pores and extinct the light.

[0046] Specifically, the matting material can be an inorganic matting powder, i.e., fumed silica, such as Degussa OK520, or an organic matting powder, i.e., organic polymethyl urea resin nanospheres, such as Clariant PERGOPAK® series, which has a porous spherical shape, an internal honeycomb porous structure, a pore size of 0.1-0.5μm, and a high specific surface area, resulting in efficient matting.

[0047] It is worth noting that the matting material is one or more of fumed silica and organic polymethyl urea resin nanospheres. Fumed silica alone has a better matting effect than organic polymethyl urea resin nanospheres alone. However, organic polymethyl urea resin nanospheres have a higher refractive index, which allows them to improve transparency and water resistance while simultaneously matting the light. When the two are used in combination, fumed silica should be added first, followed by the organic polymethyl urea resin nanospheres, to prevent flocculation.

[0048] Furthermore, the modified high-modulus potassium silicate has a pH value of 10-12 and a solid content of 15-20%.

[0049] Preferably, the nanorod-shaped zinc oxide has a particle size of no more than 20 nm, and the particle diameter in the dispersed state is 120-180 nm.

[0050] Specifically, by utilizing the light scattering effect of nanorod-shaped zinc oxide particles, the number of times light is scattered within the material is increased, so that the nanoparticles not only have the function of filling pores in the glaze, but also have the function of extinction. The particle size of the nanorod-shaped zinc oxide is no greater than 20nm, and the dispersed particle diameter is concentrated in 120-180nm, ensuring that the nanorod-shaped zinc oxide particles scatter visible light and play a corresponding role in extinction.

[0051] Preferably, the additives include dispersants, defoamers, film-forming aids, and coupling agents;

[0052] The dispersant is an anionic surfactant, the defoamer is an organosilicon defoamer, and the film-forming aid has a viscosity of 3-7 mPa·s.

[0053] The additives include dispersants, defoamers, film-forming aids, and coupling agents. Anionic surfactants are used to achieve dispersion by forming negative charge repulsion on the surface of the nanorod-shaped zinc oxide particles, ensuring that the particle diameter of the dispersed nanorod-shaped zinc oxide is 120-180 nm. Examples include sodium dodecylbenzene sulfonate (SDBS) and sodium naphthalene sulfonate formaldehyde condensate (NNO). Organosilicon defoamers are used to achieve a large defoaming effect with a small dosage, ensuring that the underlying antifouling material can fill the surface defects of the brick surface densely, ensuring good antifouling effect. The coupling agent can activate the bonding force between the nanorod-shaped zinc oxide particles and the modified high-modulus potassium silicate, thereby improving the flexibility of the underlying antifouling material. The coupling agent can be KH550 or KH370. At the same time, the film-forming aid is limited to a low viscosity, mainly to prevent the viscosity of the underlying antifouling material from increasing and causing wax burning. This facilitates the composite formation of the nanoparticle dispersion and the modified high-modulus potassium silicate and promotes film formation. The use of the above additives can ensure that the underlying antifouling material can better fill the glaze pores and other defects, while ensuring good matting and antifouling effects.

[0054] Preferably, the surface antifouling material is also included, which comprises siloxanes and silane-based materials and a catalyst, wherein the mass ratio of the siloxanes and silane-based materials to the catalyst is 100:(0.5-1.5).

[0055] Specifically, the surface antifouling material includes siloxanes and silane-based materials and a catalyst. The siloxanes and silane-based materials have hydrolyzable groups, which, under the action of the catalyst, hydrolyze and condense to form a Si-O-Si three-dimensional network. The network itself has solid components, which are then replenished and filled to further ensure the antifouling effect. The mass ratio of the siloxanes and silane-based materials to the catalyst is 100:(0.5-1.5) to ensure a moderate curing speed and prevent wax burning.

[0056] Preferably, the siloxane and silane material are one or more mixed oligomers selected from methylsiloxane, methyltriethoxysilane and triacetoxysilane, and the solid content of the siloxane and silane material is 38-42%;

[0057] The catalyst is dibutyltin dilaurate.

[0058] Specifically, the solid content of the siloxane and silane-based materials is 38-42%, ensuring that the surface antifouling material forms an effective film while maintaining a moderate viscosity or an appropriate amount of active ingredients to prevent wax burning.

[0059] Furthermore, the catalyst is dibutyltin dilaurate, which is a fast-drying tin catalyst with low toxicity. It catalyzes cross-linking and curing, promotes the hydrolysis of hydrolyzable groups of siloxane oligomers, and condenses them to form a Si-O-Si three-dimensional network. At the same time, it significantly shortens the surface drying time from several hours to tens of minutes, improving efficiency. It can also regulate the reaction depth and control the cross-linking density, ensuring that the final surface antifouling material has good hardness, flexibility and adhesion.

[0060] A method for using a soft-polished brick anti-fouling material includes the following steps:

[0061] S1. Polish the tiles to a gloss level of 18-25° and keep the surface dry;

[0062] S2. The modified high-modulus potassium silicate, nanoparticle dispersion and matting material are mixed in the formula amount to obtain soft polished brick antifouling material;

[0063] S3. Apply the anti-fouling material for polished tiles to the tile surface using a waxing machine and a fiber pad, and let it dry.

[0064] Specifically, while ensuring the anti-fouling effect, the anti-fouling material for polished bricks uses fiber pads with a hardness of 4P. It can fill glaze defects and effectively prevent gloss, providing a good soft gloss effect while improving anti-fouling durability.

[0065] The brick temperature is between 40-70℃ to ensure that the anti-fouling material of the soft-polished bricks is dry.

[0066] A method for using a soft-polished brick anti-fouling material includes the following steps:

[0067] S1. Polish the tiles to a gloss level of 18-25° and keep the surface dry;

[0068] S2. Mix the modified high-modulus potassium silicate, nanoparticle dispersion and matting material in the formula amount to obtain the bottom antifouling material, and mix the siloxane and silane materials and catalyst in the formula amount to obtain the top antifouling material.

[0069] S3. Use a waxing machine and a fiber pad to apply a base stain-resistant material to the tile surface;

[0070] S4. After the bottom anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top anti-fouling material.

[0071] Specifically, a sponge pad is used for applying the surface anti-fouling material. Since the bottom layer of anti-fouling material has already filled most of the surface defects of the brick, excessive pressure and filling volume are no longer required. The sponge pad ensures uniform coating and the flatness of the brick surface. In step S3, to avoid glossiness, the pressure is chosen to be low, which may result in some incomplete filling of glaze defects. The second layer of anti-fouling material itself also contains solid components, which can be used for secondary filling to ensure the anti-fouling effect. Through the above steps, good filling is achieved under relatively low pressure, without significantly increasing gloss, and the anti-fouling material is ensured to adhere to the brick surface, improving the durability of the anti-fouling material and solving the problems of poor anti-fouling performance, insufficient durability, and insufficient soft-gloss effect of current soft-polished bricks.

[0072] Specifically, in step S4, after applying the base layer of anti-fouling material, the temperature of the brick body is between 40-70℃ to ensure that the base layer of anti-fouling material has dried.

[0073] Preferably, in step S4, when applying the surface anti-fouling material, the grinding disc of the waxing machine revolves at a speed of 100-120 r / min, the abrasive mounted on the grinding disc rotates at a speed of 1200-1400 r / min, and the grinding head pressure is 5-8 kg.

[0074] Preferably, in step S3, the revolution speed of the polishing disc of the waxing machine is 100-120 r / min, the rotation speed of the abrasive installed on the polishing disc is 1200-1400 r / min, and the pressure of the polishing head is 5-8 kg.

[0075] Specifically, the grinding head pressure is limited to 5-8 kg. This pressure is significantly lower than the pressure required for silica sol, which can effectively prevent shine while ensuring that the underlying anti-fouling material adheres well to the brick surface.

[0076] The technical solution of the present invention will be further illustrated below through specific embodiments.

[0077] Example group

[0078] Example 1

[0079] S1. Polish the tiles to a gloss level of 25° and keep the surface dry; at this point, the tile surface should appear... Figure 1 As shown;

[0080] S2. Modified high-modulus potassium silicate, nanoparticle dispersion and organic polymethylurea resin nanospheres are mixed to obtain the bottom antifouling material, wherein the mass ratio of modified high-modulus potassium silicate, nanoparticle dispersion and organic polymethylurea resin nanospheres is 8:2:0.4.

[0081] The nanoparticle dispersion comprises nanorod-shaped zinc oxide, additives, and water; the mass ratio of nanorod-shaped zinc oxide, additives, and water is 25:2:55; and the particle diameter of the nanorod-shaped zinc oxide in the dispersed state is 150±30nm.

[0082] The modified high-modulus potassium silicate has a SiO2 to K2O molar ratio n of 5.8, a pH of 11, and a solid content of 18%.

[0083] A surface antifouling material is obtained by mixing siloxanes and silane-based materials with dibutyltin dilaurate, wherein the mass ratio of the siloxanes and silane-based materials to dibutyltin dilaurate is 100:0.5.

[0084] S3. Use a waxing machine, set the grinding disc of the waxing machine to a revolution speed of 110r / min, the abrasive mounted on the grinding disc to a rotation speed of 1300r / min, the grinding head pressure to 7kg, and use a fiber pad to apply the bottom anti-fouling material to the surface of the tile.

[0085] S4. After the base layer of anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top layer of anti-fouling material. At this point, the brick surface will look like... Figure 2 As shown.

[0086] Example 2

[0087] S1. Polish the tiles to a gloss level of 25° and keep the surface dry;

[0088] S2. Modified high-modulus potassium silicate, nanoparticle dispersion, and organic polymethylurea resin nanospheres are mixed to obtain a bottom antifouling material, wherein the mass ratio of modified high-modulus potassium silicate, nanoparticle dispersion, and organic polymethylurea resin nanospheres is 6:1:0.2.

[0089] The nanoparticle dispersion comprises nanorod-shaped zinc oxide, additives, and water; the mass ratio of nanorod-shaped zinc oxide, additives, and water is 25:2:55; and the particle diameter of the nanorod-shaped zinc oxide in the dispersed state is 150±30nm.

[0090] The modified high-modulus potassium silicate has a SiO2 to K2O molar ratio n of 5.8, a pH of 11, and a solid content of 18%.

[0091] A surface antifouling material is obtained by mixing siloxanes and silane-based materials with dibutyltin dilaurate, wherein the mass ratio of the siloxanes and silane-based materials to dibutyltin dilaurate is 100:1.

[0092] S3. Use a waxing machine, set the grinding disc of the waxing machine to a revolution speed of 110r / min, the abrasive mounted on the grinding disc to a rotation speed of 1300r / min, the grinding head pressure to 7kg, and use a fiber pad to apply the bottom anti-fouling material to the surface of the tile.

[0093] S4. After the bottom anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top anti-fouling material.

[0094] Example 3

[0095] S1. Polish the tiles to a gloss level of 25° and keep the surface dry;

[0096] S2. Modified high-modulus potassium silicate, nanoparticle dispersion and organic polymethylurea resin nanospheres are mixed to obtain the bottom antifouling material, wherein the mass ratio of modified high-modulus potassium silicate, nanoparticle dispersion and organic polymethylurea resin nanospheres is 7:3:0.6;

[0097] The nanoparticle dispersion comprises nanorod-shaped zinc oxide, additives, and water; the mass ratio of nanorod-shaped zinc oxide, additives, and water is 25:2:55; and the particle diameter of the nanorod-shaped zinc oxide in the dispersed state is 150±30nm.

[0098] The modified high-modulus potassium silicate has a SiO2 to K2O molar ratio n of 5.8, a pH of 11, and a solid content of 18%.

[0099] A surface antifouling material is obtained by mixing siloxanes and silane-based materials with dibutyltin dilaurate, wherein the mass ratio of the siloxanes and silane-based materials to dibutyltin dilaurate is 100:1.5.

[0100] S3. Use a waxing machine, set the grinding disc of the waxing machine to a revolution speed of 110r / min, the abrasive mounted on the grinding disc to a rotation speed of 1300r / min, the grinding head pressure to 7kg, and use a fiber pad to apply the bottom anti-fouling material to the surface of the tile.

[0101] S4. After the bottom anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top anti-fouling material.

[0102] Example 4

[0103] S1. Polish the tiles to a gloss level of 25° and keep the surface dry;

[0104] S2. Modified high-modulus potassium silicate, nanoparticle dispersion and organic polymethylurea resin nanospheres are mixed to obtain a soft-polished brick antifouling material, wherein the mass ratio of modified high-modulus potassium silicate, nanoparticle dispersion and organic polymethylurea resin nanospheres is 8:2:0.4.

[0105] The nanoparticle dispersion comprises nanorod-shaped zinc oxide, additives, and water; the mass ratio of nanorod-shaped zinc oxide, additives, and water is 25:2:55; and the particle diameter of the nanorod-shaped zinc oxide in the dispersed state is 150±30nm.

[0106] The modified high-modulus potassium silicate has a SiO2 to K2O molar ratio n of 5.8, a pH of 11, and a solid content of 18%.

[0107] S3. Use a waxing machine, set the grinding disc's revolution speed to 110r / min, the abrasive's rotation speed on the grinding disc to 1300r / min, the grinding head pressure to 7kg, and use a fiber pad to apply the soft polishing tile anti-fouling material to the tile surface.

[0108] Example 5

[0109] S1. Polish the tiles to a gloss level of 25° and keep the surface dry;

[0110] S2. Modified high-modulus potassium silicate, nanoparticle dispersion, fumed silica, and organic polymethylurea resin nanospheres are mixed to obtain a bottom antifouling material. The mass ratio of the modified high-modulus potassium silicate, nanoparticle dispersion, and organic polymethylurea resin nanospheres is 8:2:0.4. Fumed silica is added first, followed by organic polymethylurea resin nanospheres.

[0111] The nanoparticle dispersion comprises nanorod-shaped zinc oxide, additives, and water; the mass ratio of nanorod-shaped zinc oxide, additives, and water is 25:2:55; and the particle diameter of the nanorod-shaped zinc oxide in the dispersed state is 150±30nm.

[0112] The modified high-modulus potassium silicate has a SiO2 to K2O molar ratio n of 5.8, a pH of 11, and a solid content of 18%.

[0113] A surface antifouling material is obtained by mixing siloxanes and silane-based materials with dibutyltin dilaurate, wherein the mass ratio of the siloxanes and silane-based materials to dibutyltin dilaurate is 100:0.5.

[0114] S3. Use a waxing machine, set the grinding disc of the waxing machine to a revolution speed of 110r / min, the abrasive mounted on the grinding disc to a rotation speed of 1300r / min, the grinding head pressure to 7kg, and use a fiber pad to apply the bottom anti-fouling material to the surface of the tile.

[0115] S4. After the bottom anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top anti-fouling material.

[0116] Comparative group

[0117] Comparative Example 1

[0118] S1. Polish the tiles to a gloss level of 25° and keep the surface dry;

[0119] S2. A bottom antifouling material is obtained by mixing high-modulus potassium silicate, nanoparticle dispersion, and organic polymethylurea resin nanospheres. The mass ratio of the high-modulus potassium silicate, nanoparticle dispersion, and organic polymethylurea resin nanospheres is 8:2:0.4. The high-modulus potassium silicate is not modified with silane coupling agents or organosilicon. The nanoparticle dispersion contains nanorod-shaped zinc oxide, additives, and water. The mass ratio of the nanorod-shaped zinc oxide, additives, and water is 25:2:55. The particle diameter of the nanorod-shaped zinc oxide in its dispersed state is 150±30 nm.

[0120] The high-modulus potassium silicate has a SiO2 to K2O molar ratio n of 5.8, a pH of 11, and a solid content of 18%.

[0121] A surface antifouling material is obtained by mixing siloxanes and silane-based materials with dibutyltin dilaurate, wherein the mass ratio of the siloxanes and silane-based materials to dibutyltin dilaurate is 100:0.5.

[0122] S3. Use a waxing machine, set the grinding disc of the waxing machine to a revolution speed of 110r / min, the abrasive mounted on the grinding disc to a rotation speed of 1300r / min, the grinding head pressure to 7kg, and use a fiber pad to apply the bottom anti-fouling material to the surface of the tile.

[0123] S4. After the bottom anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top anti-fouling material.

[0124] Comparative Example 2

[0125] S1. Polish the tiles to a gloss level of 25° and keep the surface dry;

[0126] S2. Modified high-modulus potassium silicate, nanoparticle dispersion and organic polymethylurea resin nanospheres are mixed to obtain the bottom antifouling material, wherein the mass ratio of modified high-modulus potassium silicate, nanoparticle dispersion and organic polymethylurea resin nanospheres is 8:2:0.4.

[0127] The nanoparticle dispersion comprises nano-spherical zinc oxide, additives, and water; the mass ratio of nano-spherical zinc oxide, additives, and water is 25:2:55; the particle diameter of the nano-spherical zinc oxide in the dispersed state is 150±30nm.

[0128] The modified high-modulus potassium silicate has a SiO2 to K2O molar ratio n of 5.8, a pH of 11, and a solid content of 18%.

[0129] A surface antifouling material is obtained by mixing siloxanes and silane-based materials with dibutyltin dilaurate, wherein the mass ratio of the siloxanes and silane-based materials to dibutyltin dilaurate is 100:0.5.

[0130] S3. Use a waxing machine, set the grinding disc of the waxing machine to a revolution speed of 110r / min, the abrasive mounted on the grinding disc to a rotation speed of 1300r / min, the grinding head pressure to 7kg, and use a fiber pad to apply the bottom anti-fouling material to the surface of the tile.

[0131] S4. After the bottom anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top anti-fouling material.

[0132] Comparative Example 3

[0133] S1. Polish the tiles to a gloss level of 25° and keep the surface dry;

[0134] S2. A bottom antifouling material is obtained by mixing silica sol, nanoparticle dispersion and organic polymethyl urea resin nanospheres, wherein the mass ratio of silica sol, nanoparticle dispersion and organic polymethyl urea resin nanospheres is 8:2:0.4.

[0135] The nanoparticle dispersion comprises nanorod-shaped zinc oxide, additives, and water; the mass ratio of nanorod-shaped zinc oxide, additives, and water is 25:2:55; and the particle diameter of the nanorod-shaped zinc oxide in the dispersed state is 150±30nm.

[0136] A surface antifouling material is obtained by mixing siloxanes and silane-based materials with dibutyltin dilaurate, wherein the mass ratio of the siloxanes and silane-based materials to dibutyltin dilaurate is 100:0.5.

[0137] S3. Use a waxing machine, set the grinding disc of the waxing machine to a revolution speed of 110r / min, the abrasive mounted on the grinding disc to a rotation speed of 1300r / min, the grinding head pressure to 7kg, and use a fiber pad to apply the bottom anti-fouling material to the surface of the tile.

[0138] S4. After the bottom anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top anti-fouling material.

[0139] Comparative Example 4

[0140] S1. Polish the tiles to a gloss level of 25° and keep the surface dry;

[0141] S2. A bottom antifouling material is obtained by mixing silica sol, nanoparticle dispersion and organic polymethyl urea resin nanospheres, wherein the mass ratio of silica sol, nanoparticle dispersion and organic polymethyl urea resin nanospheres is 8:2:0.4.

[0142] The nanoparticle dispersion comprises nanorod-shaped zinc oxide, additives, and water; the mass ratio of nanorod-shaped zinc oxide, additives, and water is 25:2:55; and the particle diameter of the nanorod-shaped zinc oxide in the dispersed state is 150±30nm.

[0143] A surface antifouling material is obtained by mixing siloxanes and silane-based materials with dibutyltin dilaurate, wherein the mass ratio of the siloxanes and silane-based materials to dibutyltin dilaurate is 100:0.5.

[0144] S3. Use a waxing machine, set the grinding disc of the waxing machine to a revolution speed of 110r / min, the abrasive mounted on the grinding disc to a rotation speed of 1300r / min, the grinding head pressure to 30kg, and use a fiber pad to apply the bottom anti-fouling material to the surface of the tile.

[0145] S4. After the bottom anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top anti-fouling material.

[0146] Comparative Example 5

[0147] S1. Polish the tiles to a gloss level of 25° and keep the surface dry;

[0148] S2. Modified high-modulus potassium silicate, nanoparticle dispersion and organic polymethylurea resin nanospheres are mixed to obtain the bottom antifouling material, wherein the mass ratio of modified high-modulus potassium silicate, nanoparticle dispersion and organic polymethylurea resin nanospheres is 8:2:0.4.

[0149] The nanoparticle dispersion comprises nanorod-shaped zinc oxide, additives, and water; the mass ratio of nanorod-shaped zinc oxide, additives, and water is 25:2:55; and the particle diameter of the nanorod-shaped zinc oxide in the dispersed state is 150±30nm.

[0150] The modified high-modulus potassium silicate has a SiO2 to K2O molar ratio n of 5.8, a pH of 11, and a solid content of 18%.

[0151] The surface antifouling material is a mixture of silicone oil and 120# solvent oil.

[0152] S3. Use a waxing machine, set the grinding disc of the waxing machine to a revolution speed of 110r / min, the abrasive mounted on the grinding disc to a rotation speed of 1300r / min, the grinding head pressure to 7kg, and use a fiber pad to apply the bottom anti-fouling material to the surface of the tile.

[0153] S4. After the bottom anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top anti-fouling material.

[0154] Comparative Example 6

[0155] Compared with Example 5, the difference in Comparative Example 6 is that fumed silica and organic polymethylurea resin nanospheres were added directly and mixed without any specific order.

[0156] Comparative Example 7

[0157] Compared with Example 1, the difference in Comparative Example 7 is that the molar ratio of the modified high-modulus potassium silicate is 3.

[0158] Comparative Example 8

[0159] Compared with Example 1, the difference in Comparative Example 8 is that the particle diameter of the nanorod-shaped zinc oxide in the dispersed state is 90±30nm.

[0160] Comparative Example 9

[0161] Compared with Example 1, the difference in Comparative Example 9 is that the mass ratio of the nanorod-shaped zinc oxide, additives and water in the nanoparticle dispersion is 50:2:55.

[0162] Comparative Example 10

[0163] Compared with Example 1, Comparative Example 10 differs in that the mass ratio of the siloxane and silane-based materials to dibutyltin dilaurate is 20:1.

[0164] The gloss and stain resistance of the bricks treated with the above examples and comparative examples were tested. After surface dewaxing with double-flying powder, the stain resistance was tested again. A 60° gloss meter was used to test the gloss of the brick surface, and the stain resistance level was determined according to GB / T 3810.14-2016 "Ceramic Tiles Test Methods Part 14: Determination of Stain Resistance". The specific test results are shown in Table 1.

[0165]

[0166] As shown in Table 1, the gloss of Examples 1-5, after treatment with the antifouling material of this scheme, can be maintained at no higher than 45°, and can reach a minimum of 33°. Furthermore, after double-flying powder treatment, the antifouling material did not experience significant peeling, and its antifouling performance remained consistent with that before double-flying powder treatment. This indicates that the antifouling material can effectively fill pores to ensure antifouling performance while possessing high adhesion. Even after double-flying powder treatment, it still exhibits good antifouling performance and a good soft-light effect. In Example 4, the lack of a top-layer antifouling material resulted in weaker antifouling performance compared to Examples 1-3, which had a top-layer antifouling material. However, the antifouling performance before and after double-flying powder treatment remained consistent, indicating that even a single-layer antifouling material has high adhesion. Adding a top-layer antifouling material can further improve the level of antifouling performance.

[0167] Compared to Example 1, Comparative Example 1 used high-modulus potassium silicate that was not modified with silane coupling agent and organosilicon, resulting in poor adhesion. After being treated with double-flying powder, its anti-fouling performance was weakened.

[0168] Compared to Example 1, Comparative Example 2 uses nano-spherical zinc oxide, which has better anti-fouling performance and adhesion. However, because it uses spherical zinc oxide, its scattering effect on visible and ultraviolet light is not as good as that of rod-shaped zinc oxide, and its gloss is higher than that of Example 1.

[0169] Comparative Examples 3 and 4 use silica sol instead of modified high-modulus potassium silicate. Under the pressure specified in this invention, Comparative Example 3 can ensure a soft-light effect, but it cannot meet the pressure required for silica sol to fill the pore defects of the glaze, and its anti-fouling performance is only level 3-4. Comparative Example 4 uses a larger pressure to meet the requirements for silica sol to fill the defects of the brick surface, but the soft-light effect is not good, and the gloss is as high as 93°. While failing to meet the soft-light effect, it has good adhesion and anti-fouling performance.

[0170] Compared with Example 1, Comparative Example 5 uses a mixture of silicone oil and 120# solvent oil as the surface antifouling material. However, its antifouling performance is not as good as that of Example 1 using the surface antifouling material of the present invention. Furthermore, its antifouling ability is weakened after being treated with double fly powder, and its adhesion is not as good as that of Example 1.

[0171] Compared with Example 5, Comparative Example 6 used fumed silica and organic polymethyl urea resin nanospheres as matting materials. However, Comparative Example 6 did not add fumed silica first and then add polymethyl urea resin microspheres. As a result, the antifouling material prepared in Comparative Example 6 flocculated and could not be coated.

[0172] Compared with Example 1, the molar ratio of the modified high-modulus potassium silicate in Comparative Example 7 is not in the range of 5.7-5.9, has poor water resistance, is easily corroded by water, and has poor antifouling performance.

[0173] Compared with Example 1, the particle diameter of the nanorod-shaped zinc oxide in the dispersed state of Comparative Example 8 is not in the range of 120-180nm. The dispersed particle size is smaller, the scattering effect of visible light is weaker, the extinction effect is reduced, and the gloss can reach below 45°. However, the overall gloss is slightly higher than that of Example 1, and the anti-fouling performance is partially weakened. However, the anti-fouling performance before and after the double-flying powder treatment is consistent, indicating that it has good adhesion.

[0174] Compared to Example 1, Comparative Example 9 used too much nanorod-shaped zinc oxide, which easily agglomerated, resulting in uneven dispersion and uneven gloss. The highest and lowest gloss values ​​differed by 20°, and a slight burning phenomenon was observed. The antifouling material layer was damaged, and the antifouling performance was weaker than that of Example 1. After being treated with double-flying powder, the antifouling performance was weakened, and the durability was poor.

[0175] Compared with Example 1, Comparative Example 10 used too much catalyst in the surface antifouling material, which led to excessively fast curing and wax burning. The surface antifouling material was damaged, and the antifouling performance was weaker than that of Example 1. After double-flying powder treatment, the antifouling performance was weakened, and the gloss was uneven. The gloss could be less than 45°, but the difference between the highest and lowest gloss values ​​was 40°.

[0176] In summary, the present invention provides a soft-polished brick anti-fouling material and its application method, which, while ensuring a soft-light effect, effectively ensures that the soft-polished brick has good anti-fouling performance and anti-fouling durability.

[0177] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A type of soft-polished brick anti-fouling material, characterized in that: Including modified high-modulus potassium silicate, nanoparticle dispersions, and matting materials; The mass ratio of the modified high-modulus potassium silicate, the nanoparticle dispersion, and the matting material is (6-8):(1-3):(0.2-0.6). The modified high-modulus potassium silicate is obtained by modification with a silane coupling agent or organosilicon, and the molar ratio n of SiO2 to K2O in the modified high-modulus potassium silicate is 5.7-5.

9. The nanoparticle dispersion comprises nanorod-shaped zinc oxide, additives, and water; wherein the mass ratio of nanorod-shaped zinc oxide, additives, and water is (20-30):(1-3):(50-60). The matting material is one or more of fumed silica and organic polymethyl urea resin nanospheres. When both fumed silica and organic polymethyl urea resin nanospheres are present, fumed silica should be added first, followed by organic polymethyl urea resin nanospheres.

2. The anti-fouling material for flexible polished bricks according to claim 1, characterized in that: The modified high-modulus potassium silicate has a pH value of 10-12 and a solid content of 15-20%.

3. The anti-fouling material for flexible polished bricks according to claim 1, characterized in that: The nanorod-shaped zinc oxide has a particle size of no more than 20 nm, and its particle diameter in the dispersed state is 120-180 nm.

4. The anti-fouling material for flexible polished bricks according to claim 1, characterized in that: The additives include dispersants, defoamers, film-forming aids, and coupling agents; The dispersant is an anionic surfactant, the defoamer is an organosilicon defoamer, and the film-forming aid has a viscosity of 3-7 mPa·s.

5. The anti-fouling material for flexible polished bricks according to claim 1, characterized in that: It also includes a surface antifouling material, which comprises siloxanes and silane-based materials and a catalyst, wherein the mass ratio of the siloxanes and silane-based materials to the catalyst is 100:(0.5-1.5).

6. The anti-fouling material for flexible polished bricks according to claim 5, characterized in that: The siloxanes and silane materials are one or more mixed oligomers selected from methylsiloxane, methyltriethoxysilane, and triacetoxysilane, and the solid content of the siloxanes and silane materials is 38-42%. The catalyst is dibutyltin dilaurate.

7. The method of using the anti-fouling material for flexible polished bricks according to claim 1, characterized in that, Includes the following steps: S1. Polish the tiles to a gloss level of 18-25° and keep the surface dry; S2. The modified high-modulus potassium silicate, nanoparticle dispersion and matting material are mixed in the formula amount to obtain soft polished brick antifouling material; S3. Apply the anti-fouling material for polished tiles to the tile surface using a waxing machine and a fiber pad, and let it dry.

8. The method of using the soft-polished brick anti-fouling material according to claim 5 or 6, characterized in that, Includes the following steps: S1. Polish the tiles to a gloss level of 18-25° and keep the surface dry; S2. Mix the modified high-modulus potassium silicate, nanoparticle dispersion and matting material in the formula amount to obtain the bottom antifouling material, and mix the siloxane and silane materials and catalyst in the formula amount to obtain the top antifouling material. S3. Use a waxing machine and a fiber pad to apply a base stain-resistant material to the tile surface; S4. After the bottom anti-fouling material has dried, use a waxing machine and a sponge pad to apply the top anti-fouling material.

9. The method of using the soft-polished brick anti-fouling material according to claim 7 or 8, characterized in that: In step S3, the revolution speed of the polishing disc of the waxing machine is 100-120 r / min, the rotation speed of the abrasive installed on the polishing disc is 1200-1400 r / min, and the pressure of the polishing head is 5-8 kg.

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