Permeable floor paint and preparation method thereof

Abstract

The invention relates to a water-permeable pavement, and discloses a water-permeable floor paint and a preparation method thereof, the water-permeable floor paint comprises the following raw materials by mass: 76-81 parts of a pigment, 450 parts of water-based modified epoxy resin, 257-263 parts of water, 1.8-2.1 parts of an amine regulator, 1.9-2.2 parts of a wetting agent, 4.6-5.3 parts of ethylene glycol, and 2.5-3 kg of calcium lactate; according to the water-permeable floor paint disclosed by the invention, the calcium lactate and the high-ester pectin are added into the raw materials of the water-permeable floor paint, so that the water-permeable floor paint can be endowed with excellent water permeability, and the wear resistance and the adhesive force of the water-permeable floor paint are enhanced.

Description

Technical Field

[0001] The present application relates to a permeable floor, and in particular to a permeable floor paint and a preparation method thereof. Background Art

[0002] In the prior art, water-permeable floor paints are mostly made by adding porogens. Porogens are porous materials such as bentonite, diatomaceous earth, etc., which form porous channels in the cured coating film of the floor paint, thereby allowing water to penetrate through the coating film.

[0003] Due to the coating of porous materials by organic resin in the coating film, the water permeation channel flux actually provided by the porous materials is limited and easily saturated. A large amount of porous materials need to be added to maintain good water permeability. However, the adsorption of water in the floor paint by a large amount of porous materials leads to poor fluidity of the floor paint, and the porous materials are easy to settle, which ultimately makes the floor paint have poor self-leveling properties, uneven distribution of solid content in the coating film, low coating strength, poor pressure bearing performance, and easy local wear. Summary of the invention

[0004] In order to make the paint film of permeable floor paint have both excellent water permeability and wear resistance, a permeable floor paint and a preparation method thereof are provided.

[0005] The first above-mentioned invention objective of the present invention is achieved through the following technical solutions: A permeable floor paint comprises the following raw materials in parts by weight: Pigment 76-81 parts, 450 parts of water-based modified epoxy resin, 250-265 parts of water, 1.8 to 2.1 parts of amine regulator, Wetting agent 1.9-2.2 parts, 4.6-5.3 parts of ethylene glycol, Calcium lactate 2.5-3 parts; 3.2 to 4 parts of high ester pectin.

[0006] By adopting the above technical scheme, high ester pectin first absorbs water to form a gel during the preparation process, and then calcium ions combine with the gel formed by high ester pectin to form a composite system; after the water floor paint is applied, as the water evaporates, the liquid phase environment of the water-permeable floor paint is alkaline, and the calcium ion concentration in the liquid phase continues to increase until the solubility threshold, the composite system begins to gradually form aggregates, the pore size in the gel begins to decrease, the gel network structure becomes complex and disordered, and an irreversible decrease in water holding capacity occurs, resulting in a decrease in the re-absorption of the gel. The difference between the initial water absorption and the re-absorption causes the composite system in the paint film to form interconnected long-term permeable pore channels in the paint film after drying. The composite system will not block the permeable pore channels due to the decrease in water holding capacity, and will dissolve and combine with calcium ions again, thereby increasing the flow area of ​​the permeable pore channels again without damaging other organic phase solids. Therefore, the paint film has good permeability. In addition, the addition of calcium lactate promotes the cross-linking and curing of the resin, which can enhance the curing strength of the resin, thereby improving the wear resistance and adhesion of the paint film. Therefore, the present application adds calcium lactate and high-ester pectin to the raw materials of the permeable floor paint, which can give the permeable floor paint excellent water permeability and enhance the wear resistance and adhesion of the permeable floor paint.

[0007] Optional: also include 1.2 to 3.4 parts of microcrystalline cellulose.

[0008] By adopting the above technical scheme, microcrystalline cellulose can swell under weakly alkaline conditions, but is insoluble and does not swell under weakly acidic and neutral conditions; it swells in the microcrystalline cellulose after being mixed with the permeable floor paint, which, on the one hand, increases the tiny micropores in the cured paint film and enhances the connectivity between the pores formed by the pore former; on the other hand, it can play an emulsifying role, promote the uniform mixing and dispersion stability of the resin, pigment and pore former, and improve the self-leveling effect of the floor paint and the coating strength.

[0009] Optionally, the invention further comprises 4.5 to 6.1 parts of monoglycidyl-terminated polysiloxane.

[0010] By adopting the above technical scheme, monoglycidyl-terminated polysiloxane can promote the mixing and dispersion of inorganic solids, compound systems, and organic resins in permeable floor paints, and after curing, it can enhance the strength of the paint film itself and the bonding strength between the paint film and concrete, and improve the water permeability, adhesion and wear resistance of the cured paint film.

[0011] Optionally, the invention also includes 3.0 to 4.1 parts of modified zinc oxide modified with a silane coupling agent.

[0012] By adopting the above technical scheme, the addition of modified zinc oxide can change the stacking structure of the organic resin and the compound system in the paint film. Under a limited amount of the compound system, the number of pore channels in the paint film is more and they are interconnected, the water permeability of the paint film is better, and the wear resistance of the paint film is further improved.

[0013] Optional: The modified zinc oxide is a modified zinc oxide whisker.

[0014] By adopting the above technical scheme, the four-needle zinc oxide whiskers have better fixation effect on the compound system and stacking adjustment effect during the curing process of the permeable floor paint into a paint film, and the fixation is more stable. The resulting paint film has better water permeability and wear resistance. In addition, the structure of the zinc oxide whiskers can also reduce the growth of bacteria on the surface of the paint film and pore channels, slow down the biological aging of the paint film, and reduce the growth of bacteria in the pores to block the holes.

[0015] Optionally, the method further comprises 8 to 12 parts of a modified porous material, wherein the modified porous material is obtained by ball-milling the porous material and pregelatinized starch in a dispersion medium.

[0016] By adopting the above-mentioned technical scheme, adding an appropriate amount of porous material in the present application can also change the stacking structure of the organic resin and the compound system in the paint film, so that the water permeability of the paint film is better and the wear resistance of the paint film is further improved, and by modifying the porous material, the blocking of the entrance and exit of the pores on the surface of the porous material by the organic resin can be reduced. Although it is impossible to achieve the pore channel flow rate provided by the compound system, it can still be used as a supplement to improve the water permeability of the paint film. Optional: The dispersion medium used when the porous material and the pregelatinized starch are co-ball-milled is a mixture of polyethylene glycol, water, and ethanol.

[0017] By adopting the above technical solution, the modification effect of the porous material is better, the pregelatinized starch component is embedded in the surface of the porous material to cover a larger area, it is easier to dissolve in subsequent water contact to open the pores on the surface of the porous material, and the paint film has better water permeability.

[0018] The second above-mentioned invention objective of the present invention is achieved through the following technical solutions: A method for preparing a water-permeable floor paint comprises the following steps: Mix high ester pectin with water, and then add water to crush the high ester pectin after it absorbs water to obtain material A; Material A is mixed with the remaining other raw materials to obtain a water-permeable floor paint.

[0019] By adopting the above technical scheme, the high-ester pectin first fully absorbs water to form a gel, and then the gel and calcium ions form a complex system, thereby avoiding the reduction of pore channels caused by the local high calcium ion concentration environment in the mixing preparation prematurely affecting the water absorption of the complex system.

[0020] In summary, this application has at least the following beneficial effects: 1. The present application adds calcium lactate and high ester pectin to the raw materials of the permeable floor paint, which can give the permeable floor paint excellent water permeability and enhance the wear resistance and adhesion of the permeable floor paint; 2. Modified zinc oxide is a modified zinc oxide whisker, the addition of which can change the stacking structure of the organic resin and the compound system in the paint film. Under a limited amount of the compound system, the number of pore channels in the paint film is more and interconnected, the water permeability of the paint film is better, and the wear resistance of the paint film is further improved; 3. Adding modified zinc oxide changes the stacking structure of organic resin and compound system in the paint film. Under the limited amount of compound system, the number of pore channels in the paint film is more and interconnected, the water permeability of the paint film is better and the wear resistance of the paint film is further improved. In addition, the structure of zinc oxide whiskers can also reduce the growth of bacteria on the surface of the paint film and pore channels, slow down the biological aging of the paint film and reduce the growth of bacteria in the pores to block the holes. DETAILED DESCRIPTION

[0021] raw material The pigment is iron red paste, which is a commercially available color paste pigment; The water-based modified epoxy resin is Keding Resin MR1487W water-based acrylic modified resin; The amine regulator is hexamethylenediamine; The wetting agent is BYK-161; Monoglycidyl end-capping is poly(dimethylsiloxane)-monoglycidyl ether end-capping, CAS: 157723-26-7, which is a commercially available industrial grade product; Zinc oxide includes zinc oxide powder and zinc oxide whisker. The particle size of zinc oxide powder is 3±0.5μm. The zinc oxide whisker is four-needle type with a diameter of 4μm, a length of 20μm and an apparent density of 0.21g / cm3. The porous material is obtained by mixing diatomite and kaolin in a mass ratio of 1:0.21, and the particle size of the diatomite is 3±0.5 μm; Ethylene glycol, calcium lactate, starch, and ethanol are all commercially available industrial-grade products, and the fineness of calcium lactate and starch is 500 nm; High ester pectin is a product of Jiangsu Baoshijia Biotechnology Co., Ltd., with a purity of 99wt%, an esterification degree of 67.8%, a gel degree of 171, and a total galacturonic acid content of 84.5%.

[0022] The pregelatinized starch is obtained by uniformly mixing starch and water in a mass ratio of 1:2.4, and stirring the mixture for pregelatinization at 43°C for 45 minutes.

[0023] Preparation Example 1 A modified zinc oxide, the preparation method of which is as follows: Mix dimethyldimethoxysilane and ethanol in a mass ratio of 13:100 to obtain a modified solution; The zinc oxide whiskers and the modified liquid were mixed in a mass ratio of 32:113, heated to 35°C, stirred, and 12.5wt% ammonia water was added dropwise to adjust the pH to 8.2, and the reaction was kept warm for 1 hour; The mixture was cooled to room temperature, allowed to stand for 12 hours, filtered and dried to obtain modified zinc oxide.

[0024] Preparation Example 2 A modified zinc oxide, the preparation method of which is as follows: Mix dimethyldimethoxysilane and ethanol in a mass ratio of 13:100 to obtain a modified solution; Zinc oxide powder and modified liquid were mixed in a mass ratio of 32:113, heated to 35°C, stirred, and 12.5wt% ammonia water was added dropwise to adjust the pH to 8.2, and the mixture was kept warm for 1 hour. Cool to room temperature, let stand for 12 hours, filter and dry to obtain modified zinc oxide Preparation Example 3 A modified porous material, the preparation method of which is as follows: The porous material, pregelatinized starch and dispersion medium were put into a ball mill at a mass ratio of 10:2.3:15, mixed and ball-milled for 1 hour, and then the filtrate was filtered and dried to obtain a modified porous material.

[0025] The dispersion medium is obtained by mixing polyethylene glycol, water and ethanol in a mass ratio of 1.2:100:64.

[0026] Preparation Example 4 A modified porous material, the preparation method of which is as follows: The porous material, pregelatinized starch and dispersion medium were put into a ball mill at a mass ratio of 10:2.3:15, mixed and ball-milled for 1 hour, and then the filtrate was filtered and dried to obtain a modified porous material.

[0027] The dispersion medium is a mixture of water and ethanol in a mass ratio of 100:64.

[0028] Example 1 A water-permeable floor paint, whose raw materials are pigment, water-based modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, calcium lactate, high-ester pectin, microcrystalline cellulose and monoglycidyl-terminated polysiloxane.

[0029] The preparation method of permeable floor paint is as follows: 3.6 kg of high ester pectin was mixed evenly with 10 kg of water, and then allowed to stand for 6 hours. Then, the mixture was put into a ball mill with 40 kg of water and ball-milled until the retention rate was less than 1.5 wt% when the mixture was passed through a 10 μm sieve, to obtain material A. Material A, 180 kg of water, 80 kg of pigment, and 450 kg of water-based modified epoxy resin were uniformly mixed to obtain material B; Material B, 30 kg of water, 2 kg of amine regulator, 2 kg of wetting agent, 5 kg of ethylene glycol, 2.7 kg of calcium lactate, 2.9 kg of microcrystalline cellulose, and 5.8 kg of monoglycidyl-terminated polysiloxane were stirred and mixed uniformly to obtain a permeable floor paint.

[0030] Comparative Example 1 A water-permeable floor paint, whose raw materials are pigment, water-based modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, microcrystalline cellulose and monoglycidyl-terminated polysiloxane.

[0031] The preparation method of permeable floor paint is as follows: 230 kg of water, 80 kg of pigment, and 450 kg of water-based modified epoxy resin were uniformly mixed to obtain material B; Material B, 30 kg of water, 2 kg of amine regulator, 2 kg of wetting agent, 5 kg of ethylene glycol, 2.9 kg of microcrystalline cellulose, and 5.8 kg of monoglycidyl-terminated polysiloxane were stirred and mixed uniformly to obtain a permeable floor paint.

[0032] Comparative Example 2 A water-permeable floor paint, whose raw materials are pigment, water-based modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, calcium lactate, microcrystalline cellulose and monoglycidyl-terminated polysiloxane.

[0033] The preparation method of permeable floor paint is as follows: 230 kg of water, 80 kg of pigment, and 450 kg of water-based modified epoxy resin were uniformly mixed to obtain material B; Material B, 30 kg of water, 2 kg of amine regulator, 2 kg of wetting agent, 5 kg of ethylene glycol, 2.7 kg of calcium lactate, 2.9 kg of microcrystalline cellulose, and 5.8 kg of monoglycidyl-terminated polysiloxane were stirred and mixed uniformly to obtain a permeable floor paint.

[0034] Comparative Example 3 A water-permeable floor paint, whose raw materials are pigment, water-based modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, high-ester pectin, microcrystalline cellulose and monoglycidyl-terminated polysiloxane.

[0035] The preparation method of permeable floor paint is as follows: 3.6 kg of high ester pectin was mixed evenly with 10 kg of water, and then allowed to stand for 6 hours. Then, the mixture was put into a ball mill with 40 kg of water and ball-milled until the retention rate was less than 1.5 wt% when the mixture was passed through a 10 μm sieve, to obtain material A. Material A, 180 kg of water, 80 kg of pigment, and 450 kg of water-based modified epoxy resin were uniformly mixed to obtain material B; Material B, 30 kg of water, 2 kg of amine regulator, 2 kg of wetting agent, 5 kg of ethylene glycol, 2.9 kg of microcrystalline cellulose, and 5.8 kg of monoglycidyl-terminated polysiloxane were stirred and mixed uniformly to obtain a permeable floor paint.

[0036] Comparative Example 4 A water-permeable floor paint, whose raw materials are pigment, water-based modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, porous material, microcrystalline cellulose and monoglycidyl-terminated polysiloxane.

[0037] The preparation method of permeable floor paint is as follows: 230 kg of water, 80 kg of pigment, and 450 kg of water-based modified epoxy resin were uniformly mixed to obtain material B; Material B, 30 kg of water, 2 kg of amine regulator, 2 kg of wetting agent, 5 kg of ethylene glycol, 2.9 kg of microcrystalline cellulose, 5.8 kg of monoglycidyl-terminated polysiloxane, and 56 kg of porous material were stirred and mixed to obtain a permeable floor paint.

[0038] Comparative Example 5 A water-permeable floor paint, whose raw materials are pigment, water-based modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, porous material, microcrystalline cellulose and monoglycidyl-terminated polysiloxane.

[0039] The preparation method of permeable floor paint is as follows: 230 kg of water, 80 kg of pigment, and 450 kg of water-based modified epoxy resin were uniformly mixed to obtain material B; Material B, 30 kg of water, 2 kg of amine regulator, 2 kg of wetting agent, 5 kg of ethylene glycol, 2.9 kg of microcrystalline cellulose, 5.8 kg of monoglycidyl-terminated polysiloxane, and 70 kg of porous material were stirred and mixed to obtain a permeable floor paint.

[0040] Comparative Example 6 A water-permeable floor paint, which differs from Example 1 in that calcium lactate is replaced by an equimolar amount of calcium chloride.

[0041] Comparative Example 7 A water-permeable floor paint, which differs from Example 1 in that calcium lactate is replaced by an equimolar amount of calcium hydroxide.

[0042] Example 2 A water-permeable floor paint, which is different from Example 1 in that the amount of microcrystalline cellulose used is 1.2 kg.

[0043] Example 3 A water-permeable floor paint, which is different from Example 1 in that the amount of microcrystalline cellulose used is 3.4 kg.

[0044] Example 4 A water-permeable floor paint, which is different from Example 1 in that the amount of microcrystalline cellulose used is 0 kg.

[0045] Example 5 A water-permeable floor paint, which is different from Example 1 in that the amount of monoglycidyl-terminated polysiloxane used is 4.5 kg.

[0046] Example 6 A water-permeable floor paint, which is different from Example 1 in that the amount of monoglycidyl-terminated polysiloxane used is 6.1 kg.

[0047] Example 7 A water-permeable floor paint, which is different from Example 1 in that the amount of monoglycidyl-terminated polysiloxane used is 0 kg.

[0048] Example 8 A water-permeable floor paint, which is different from Example 1 in that the raw materials are pigment, water-based modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, calcium lactate, high-ester pectin, microcrystalline cellulose, monoglycidyl-terminated polysiloxane, and modified zinc oxide.

[0049] The preparation method is as follows: 3.6 kg of high ester pectin was mixed evenly with 10 kg of water, and then allowed to stand for 6 hours. Then, the mixture was put into a ball mill with 40 kg of water and ball-milled until the retention rate was less than 1.5 wt% when the mixture was passed through a 10 μm sieve, to obtain material A. Material A, 180 kg of water, 80 kg of pigment, and 450 kg of water-based modified epoxy resin were uniformly mixed to obtain material B; Material B, 30 kg of water, 2 kg of amine regulator, 2 kg of wetting agent, 5 kg of ethylene glycol, 2.7 kg of calcium lactate, 2.9 kg of microcrystalline cellulose, 5.8 kg of monoglycidyl-terminated polysiloxane, and 3.0 kg of modified zinc oxide were stirred and mixed uniformly to obtain a permeable floor paint.

[0050] The modified zinc oxide was prepared in Preparation Example 1.

[0051] Example 9 A water-permeable floor paint, which differs from Example 8 in that the modified zinc oxide is 3.6 kg.

[0052] Example 10 A water-permeable floor paint, which differs from Example 8 in that the modified zinc oxide is 4.1 kg.

[0053] Embodiment 11 A water-permeable floor paint, which differs from Example 8 in that the modified zinc oxide is 5.6 kg.

[0054] Example 12 A water-permeable floor paint, which is different from Example 9 in that the modified zinc oxide is prepared according to Preparation Example 2.

[0055] Example 13 A water-permeable floor paint, whose raw materials are pigment, water-based modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, calcium lactate, high-ester pectin, microcrystalline cellulose, monoglycidyl-terminated polysiloxane, and modified porous material.

[0056] The preparation method of permeable floor paint is as follows: 3.6 kg of high ester pectin was mixed evenly with 10 kg of water, and then allowed to stand for 6 hours. Then, the mixture was put into a ball mill with 40 kg of water and ball-milled until the retention rate was less than 1.5 wt% when the mixture was passed through a 10 μm sieve, to obtain material A. Material A, 180 kg of water, 80 kg of pigment, and 450 kg of water-based modified epoxy resin were uniformly mixed to obtain material B; Material B, 30 kg of water, 2 kg of amine regulator, 2 kg of wetting agent, 5 kg of ethylene glycol, 2.7 kg of calcium lactate, 2.9 kg of microcrystalline cellulose, 5.8 kg of monoglycidyl-terminated polysiloxane, and 10 kg of modified porous material are stirred and mixed evenly to obtain a permeable floor paint.

[0057] The modified porous material was prepared in Preparation Example 3.

[0058] Embodiment 14 A water-permeable floor paint, which differs from Example 13 in that the modified porous material is prepared according to Preparation Example 4.

[0059] Embodiment 15 A water-permeable floor paint, which differs from Example 13 in that the modified porous material is replaced by a porous material of equal mass.

[0060] Example 16 A permeable floor paint, which differs from Example 13 in that the amount of raw materials used is different, as follows: 76kg pigment, 450kg water-based modified epoxy resin, 257kg water (27kg water when material B is mixed with other raw materials), 1.8kg amine regulator, 1.9kg wetting agent, 4.6kg ethylene glycol, 2.5kg calcium lactate, 3.2kg high ester pectin, 3.4kg microcrystalline cellulose, 4.5kg monoglycidyl-terminated polysiloxane, and 12kg modified porous material.

[0061] Embodiment 17 A permeable floor paint, which differs from Example 13 in that the amount of raw materials used is different, as follows: 81kg pigment, 450kg water-based modified epoxy resin, 263kg water (33kg water when material B is mixed with other raw materials), 2.1kg amine regulator, 2.2kg wetting agent, 5.3kg ethylene glycol, 3kg calcium lactate, 4kg high ester pectin, 1.2kg microcrystalline cellulose, 6.1kg monoglycidyl-terminated polysiloxane, and 8kg modified porous material.

[0062] Embodiment 18 A permeable floor paint, which differs from Example 9 in that the amount of raw materials used is different, as follows: 76kg pigment, 450kg water-based modified epoxy resin, 257kg water (27kg water when material B is mixed with other raw materials), 1.8kg amine regulator, 1.9kg wetting agent, 4.6kg ethylene glycol, 2.5kg calcium lactate, 3.2kg high ester pectin, 3.4kg microcrystalline cellulose, 4.5kg monoglycidyl-terminated polysiloxane, and 4.1kg modified zinc oxide.

[0063] Embodiment 19 A permeable floor paint, which differs from Example 9 in that the amount of raw materials used is different, as follows: 81kg pigment, 450kg water-based modified epoxy resin, 263kg water (33kg water when material B is mixed with other raw materials), 2.1kg amine regulator, 2.2kg wetting agent, 5.3kg ethylene glycol, 3kg calcium lactate, 4kg high ester pectin, 1.2kg microcrystalline cellulose, 6.1kg monoglycidyl-terminated polysiloxane, and 3kg modified zinc oxide.

[0064] The water permeability, abrasion resistance and adhesion of the water-permeable floor paints obtained in Examples 1 to 19 and Comparative Examples 1 to 6 were tested.

[0065] Water permeability: During the research process of this application, the material "Suna, Wang Chongwu. Discussion on factors affecting water permeability test of exterior wall coatings [J]. China Coatings, 2021, 36(5):7. DOI:10.13531." was usually tested and consulted. It was learned that according to the existing water permeability test after coating on the permeable concrete board, the water content and maintenance conditions of the permeable concrete board are greatly affected by the test results. The deviation is large. Therefore, this application draws on the idea of ​​improving the water permeability method of building exterior wall coatings.

[0066] According to the standard, apply a layer of wax on the flat glass, and then apply the paint on the wax. After the paint film is dry, carefully scrape the film off the glass bottom plate, and then place the water permeability test device (funnel) in the middle of the film according to the same method specified in GB / T9755-2014, and seal it with a non-absorbent sealing material. Since the film is thin, the film and the funnel may sag after the funnel is filled with water. Therefore, the film and the funnel are fixed in a stainless steel sieve. After the sealing material is dry, slowly inject water into the water permeability test device, so that the film will not sag and the water that passes through the film can still flow out freely. Add water until the 0mL scale of the test tube, confirm that there are no bubbles in the container, and wrap the top of the glass tube with tin box paper. After standing for 90 minutes in a standard environment (25℃, standard atmospheric pressure), observe and record the number of milliliters of liquid level drop as the water seepage. The greater the water seepage, the stronger the water permeability.

[0067] Abrasion resistance: Tested according to HG / T 6088-2022 Permeable Road Coatings. The results are expressed in terms of wear. The less wear, the better the wear resistance.

[0068] Adhesion: The test is carried out in accordance with "HG / T 6088-2022 Permeable Road Paint" using the pull-off method. The result is expressed as peel strength (MPa). The greater the peel strength, the stronger the adhesion.

[0069] The test results are shown in the following table.

[0070] Table 1. Test results of Examples 1 to 19 and Comparative Examples 1 to 7 Combining Table 1, it can be seen that compared with Example 1 and Comparative Examples 1 to 3: The raw materials of the permeable floor paint of Example 1 include calcium lactate and high ester pectin. After fully absorbing water, the high ester pectin is ball-milled into a slurry, namely material A. Material A is then mixed evenly with water-based epoxy resin, water and pigment to obtain material B. Material B is then mixed evenly with the remaining raw materials.

[0071] Compared with Example 1, Comparative Example 1 does not add calcium lactate and high-ester pectin, and only uses the water used in Material A to replace Material A; the water permeability of Comparative Example 1 is significantly lower than that of Example 1, and the wear resistance and adhesion of Comparative Example 1 are lower than those of Example 1.

[0072] The raw materials of Comparative Example 2 include calcium lactate but no high ester pectin, and the calcium lactate is mixed with material B in the final step; the water permeability of Comparative Example 2 is significantly lower than that of Example 1 and is similar to that of Comparative Example 1, and the wear resistance and adhesion of Comparative Example 2 are lower than those of Example 1.

[0073] The raw materials of Comparative Example 3 include high-ester pectin but no calcium lactate; the water permeability of Comparative Example 3 is significantly lower than that of Example 1 and lower than that of Comparative Example 1, and the wear resistance and adhesion of Comparative Example 3 are lower than those of Example 1.

[0074] After adding calcium lactate and high ester pectin to the raw materials of the permeable floor paint in Example 1, the synergistic effect of calcium lactate and high ester pectin - the high ester pectin first absorbs water alone to form a gel during the preparation process, and then the subsequent raw materials are continuously mixed to obtain the permeable floor paint. At this time, the calcium ions combine with the gel formed by the high ester pectin to form a composite system; after the water floor paint is applied, it evaporates with the water. At this time, the liquid phase environment of the permeable floor paint is alkaline, and the calcium ion concentration in the liquid phase continues to increase until the solubility threshold, the composite system begins to gradually form aggregates, the pore size in the gel begins to decrease, the gel network structure becomes complex and disordered, and an irreversible decrease in water holding capacity occurs, resulting in a decrease in the re-absorption of water from the gel.

[0075] The difference between initial water absorption and repeated water absorption makes the composite system in the paint film form interconnected long-term water-permeable pore channels in the paint film after drying. The composite system will not block the water-permeable pore channels due to the decrease in water holding capacity, and will dissolve and combine with calcium ions again, so that the flow area of ​​the water-permeable pore channels will be increased again without damaging other organic phase solids, so that the paint film has good water permeability. In addition, the addition of calcium lactate promotes the cross-linking and curing of the resin, which can enhance the curing strength of the resin, thereby improving the wear resistance and adhesion of the paint film.

[0076] Combined with Comparative Examples 4-5, calcium lactate and high ester pectin were not added to the raw materials of the permeable floor paints of Comparative Examples 4-5, but porous materials were added, and the amount of porous material added in Comparative Example 5 was greater than that in Comparative Example 4. The water permeability, wear resistance and adhesion of Comparative Example 4 were improved compared with Comparative Example 1, but still not as good as Example 1.

[0077] The water permeability of Comparative Example 5 is greater than that of Comparative Example 1 and Comparative Example 4 and is close to that of Example 1, but the wear resistance and adhesion of Comparative Example 5 are not only significantly lower than those of Example 1, but also lower than those of Comparative Example 4. The reason is that in Comparative Example 5, the water permeability of the final paint film is improved by increasing the proportion of porous materials, but too much porous material is added, which reduces the uniformity of the paint film coating, the internal bonding strength of the paint film after coating and curing, and the bonding strength to the substrate, so the wear resistance and adhesion are significantly reduced.

[0078] It can be seen from this that the water permeability of the permeable floor paint in Example 1 is not inferior to the water permeability of the water permeable floor paint improved by adding porous materials, and when obtaining better water permeability, the permeable floor paint in Example 1 is better in wear resistance and adhesion.

[0079] In combination with Comparative Examples 6 and 7, calcium lactate is a specific choice for the calcium ion source of the high-ester pectin gel-forming compound system. In Comparative Example 6, an equal mole of calcium chloride is used to replace calcium lactate, and in Comparative Example 7, an equal mole of calcium hydroxide is used to replace calcium lactate.

[0080] On the one hand, the water permeability of Comparative Example 6 is lower than that of Example 1, and on the other hand, the wear resistance and adhesion of Comparative Example 6 are also lower than those of Example 1. This is because chloride ions have a destructive effect on the compound system, causing the compound system to slowly disperse and decompose and dehydrate during the preparation and storage of the permeable floor paint, resulting in weak water permeability of the cured paint film, and chloride ions interfere with the cross-linking of the epoxy resin and destroy the molecular chains of the epoxy resin, resulting in reduced wear resistance and adhesion of the cured paint film.

[0081] The wear resistance of comparative example 7 is improved compared with that of example 1, but the adhesion and water permeability are lower than those of example 1. In addition, during the coating film formation observation process of comparative example 7, the curing speed of comparative example 7 is faster than that of example 1, comparative example 1, and comparative example 6. The reason is that the addition of calcium hydroxide makes the epoxy floor paint cure harder, and calcium hydroxide will gradually convert into calcium carbonate, and the initial film formation is more solid and fills the pores of the paint film, resulting in a decrease in the water permeability of the paint film, an increase in wear resistance, an increase in brittleness, and a decrease in adhesion. Therefore, the present application selects calcium lactate and high-ester pectin for compound use.

[0082] In summary, the present application adds calcium lactate and high-ester pectin to the raw materials of the permeable floor paint, which can give the permeable floor paint excellent water permeability and enhance the wear resistance and adhesion of the permeable floor paint.

[0083] Comparing Examples 1 to 4, it can be seen that Examples 1 to 3 further add microcrystalline cellulose to the raw materials compared to Example 4. Microcrystalline cellulose can swell under weakly alkaline conditions, so it swells after mixing with the water-permeable floor paint. On the one hand, it increases the tiny micropores in the cured paint film and enhances the connectivity between the pores formed by the pore generator; on the other hand, it can play an emulsifying role, promote the uniform mixing and dispersion stability of the resin, pigment, and pore generator, and improve the self-leveling effect of the floor paint and the strength of the coating. Therefore, in the test results, the water permeability, wear resistance and adhesion of Examples 1 to 3 are better than those of Example 4.

[0084] By comparing Example 1 with Examples 5 to 7, it can be seen that monoglycidyl-terminated polysiloxane is added to the raw materials of Examples 1 and Examples 5 to 6 compared with Example 7. Monoglycidyl-terminated polysiloxane can promote the mixing and dispersion of inorganic solids, compound systems, and organic resins in permeable floor paints, and can enhance the strength of the paint film itself and the bonding strength between the paint film and concrete after curing, and improve the water permeability, adhesion and wear resistance of the cured paint film. In the test results, the water permeability, wear resistance and adhesion of Examples 1 and Examples 5 to 6 are better than those of Example 7, which can be verified.

[0085] By comparing Example 1 with Examples 8 to 10, it can be seen that Examples 8 to 10 add modified zinc oxide on the basis of Example 1, and the modified zinc oxide is a modified zinc oxide whisker, which can change the stacking structure of the organic resin and the compound system in the paint film. Under the limited amount of the compound system, the number of pore channels in the paint film is more and interconnected, the water permeability of the paint film is better, and the wear resistance of the paint film is further improved. In addition, the structure of the zinc oxide whisker can also reduce the growth of bacteria on the surface of the paint film and the pore channels, slow down the biological aging of the paint film, and reduce the growth of bacteria in the pores to block the holes.

[0086] In combination with Example 11, the amount of modified zinc oxide in Example 11 is greater than that in Examples 8 to 10. In the test results of Example 11, its water permeability is lower than that in Example 10, the wear resistance of Example 11 is less improved than that in Example 10, and the adhesion of Example 11 is not improved compared with Example 10. Therefore, the mass ratio of the amount of modified zinc oxide added to the amount of water-based modified epoxy resin used in this application is preferably controlled to be (3.1 to 4.0):450.

[0087] By comparing Example 9 and Example 12, it can be seen that the modified zinc oxide used in Example 12 is modified zinc oxide powder rather than zinc oxide whiskers. In the test results, the water permeability, wear resistance and adhesion of Example 12 are improved compared with Example 1, but the water permeability and wear resistance of Example 12 are not as good as Example 9. The reason is that the compound system is a gel. Compared with the granular zinc oxide powder, the four-needle zinc oxide whiskers have better fixation of the compound system and stacking adjustment effect during the curing of the permeable floor paint into a paint film, and the fixation is more stable, so the water permeability and wear resistance of the resulting paint film are better.

[0088] Comparative Example 1 and Examples 12 to 15 show that: Compared with Example 1, Example 13 adds the modified porous material prepared in Preparation Example 3, and the amount of the porous material used is less than that of the porous material used in Comparative Example 4; in the test results, the water permeability, wear resistance and adhesion of Example 13 are lower than those of Example 9 and better than those of Example 12.

[0089] Compared with Example 1, Example 14 adds the modified porous material prepared in Preparation Example 4, and the amount of the porous material used is less than that of the porous material used in Comparative Example 4; in the test results, the wear resistance and adhesion of Example 14 and Example 12 are similar, and the water permeability of Example 14 is lower than that of Example 13 but better than that of Example 12.

[0090] In Example 15, no modified porous material was added but the porous material was directly added, and the amount of porous material used was equal to the amount of modified porous material used in Example 13. In the test results, the adhesion of Example 15 was similar to that of Example 12, but the water permeability of Example 15 was not improved compared with that of Example 12, and the uneven dispersion also led to a decrease in water permeability and wear resistance.

[0091] In summary, adding an appropriate amount of porous material in the present application can also change the stacking structure of the organic resin and the compound system in the paint film, so that the water permeability of the paint film is better and the wear resistance of the paint film is further improved. In addition, by modifying the porous material, the blockage of the entrance and exit of the pores on the surface of the porous material by the organic resin can be reduced. Although it cannot achieve the pore channel flow rate provided by the compound system, it can still serve as a supplement to improve the water permeability of the paint film.

[0092] Combined with Examples 16 to 19, the test results show that Examples 16 to 19 are significantly better in water permeability, wear resistance and adhesion than Comparative Examples 1 to 4. Therefore, the mass ratio of the raw materials used in the permeable floor paint of the present application is controlled as follows: pigment: water-based modified epoxy resin: water: amine regulator: wetting agent: ethylene glycol: calcium lactate: high ester pectin: microcrystalline cellulose: monoglycidyl-terminated polysiloxane: modified zinc oxide silicon modified by alkane coupling agent = (76 to 81): 450: (257 to 263): (1.8 to 2.1): (1.9 to 2.2): (4.6 to 5.3): (2.5 to 3): (3.2 to 4): (1.2-3.4): (4.5-6.1): (3.0-4.1), or pigment: water-based modified epoxy resin: water: amine regulator: wetting agent: ethylene glycol: calcium lactate: high ester pectin: microcrystalline cellulose: monoglycidyl end-capped polysiloxane: modified porous material = (76-81): 450: (257-263): (1.8-2.1): (1.9-2.2): (4.6-5.3): (2.5-3): (3.2-4): (1.2-3.4): (4.5-6.1): (8-12), the permeable floor paint can have excellent water permeability, wear resistance and adhesion.

[0093] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make non-creative modifications to this embodiment as needed, but as long as it is within the scope of protection required by the present invention, it will be protected by the patent law.

Claims

1. A permeable floor paint, characterized in that: Including the following raw materials by mass: Pigment 76~81 parts, 450 parts of water-based modified epoxy resin, 257~263 parts of water, 1.8~2.1 parts of amine regulator, Wetting agent 1.9~2.2 parts, 4.6~5.3 parts of ethylene glycol, Calcium lactate 2.5~3 parts, 3.2~4 parts of high ester pectin.

2. A water-permeable floor paint according to claim 1, characterized in that: It also includes 1.2 to 3.4 parts of microcrystalline cellulose.

3. A water-permeable floor paint according to claim 1, characterized in that: It also includes 4.5 to 6.1 parts of monoglycidyl-terminated polysiloxane.

4. A water-permeable floor paint according to claim 1, characterized in that: The invention also comprises 3.0-4.1 parts of modified zinc oxide modified with a silane coupling agent.

5. A water-permeable floor paint according to claim 4, characterized in that: The modified zinc oxide is a modified zinc oxide whisker.

6. A water-permeable floor paint according to claim 1, characterized in that: The invention also comprises 8 to 12 parts of modified porous material, wherein the modified porous material is obtained by ball-milling the porous material and pregelatinized starch in a dispersion medium.

7. A water-permeable floor paint according to claim 6, characterized in that: The dispersion medium used when the porous material and the pregelatinized starch are ball-milled together is a mixture of polyethylene glycol, water and ethanol.

8. A method for preparing a water-permeable floor paint according to any one of claims 1 to 7, characterized in that: The following steps are involved: Mix high ester pectin with water, and then add water to crush the high ester pectin after it absorbs water to obtain material A; Material A is mixed with the remaining other raw materials to obtain a water-permeable floor paint.

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