A permeable floor paint and its preparation method

Abstract

This application relates to a permeable pavement, and discloses a permeable floor paint and a preparation method thereof, including the following raw materials in parts by mass: 76 - 81 parts of pigment, 450 parts of waterborne modified epoxy resin, 257 - 263 parts of water, 1.8 - 2.1 parts of amine regulator, 1.9 - 2.2 parts of wetting agent, 4.6 - 5.3 parts of ethylene glycol, 2.5 - 3 kg of calcium lactate; 3.2 - 4 kg of high-ester pectin. By adding calcium lactate and high-ester pectin to the raw materials of the permeable floor paint, this application can endow the permeable floor paint with excellent water permeability, and enhance the wear resistance and adhesion of the permeable floor paint.

Description

Technical Field

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

[0002] In the prior art, floor paints with water seepage and permeability are mostly prepared by adding pore-forming agents. The pore-forming agents are porous materials such as bentonite and diatomite, 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 the porous material by the organic resin in the coating film, the flux of the water seepage channels actually provided by the porous material is limited and is easily saturated. A large amount of porous material needs to be added to maintain good water seepage and permeability of the coating. However, the adsorption of water in the floor paint by a large amount of porous material results in poor fluidity of the floor paint, and the porous material is prone to sedimentation, ultimately leading to poor self-leveling property of the floor paint, uneven distribution of the solid content in the coating film, low strength of the coating film, poor pressure-bearing performance, and easy local wear. Summary of the Invention

[0004] In order to make the film of the 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 object of the present invention is achieved by the following technical solutions:

[0006] A permeable floor paint, comprising the following raw materials in parts by mass:

[0007] 76 - 81 parts of pigment,

[0008] 450 parts of waterborne modified epoxy resin,

[0009] 250 - 265 parts of water,

[0010] 1.8 - 2.1 parts of amine regulator,

[0011] 1.9 - 2.2 parts of wetting agent,

[0012] 4.6 - 5.3 parts of ethylene glycol,

[0013] 2.5 - 3 parts of calcium lactate;

[0014] 3.2 - 4 parts of high-ester pectin.

[0015] By adopting the above technical solutions, 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 complex system; after the water-based floor paint is applied and the water volatilizes, the liquid phase environment of the permeable floor paint is alkaline at this time, and the calcium ion concentration in the liquid phase continuously increases until the solubility threshold, and the complex system begins to gradually form aggregates, the pore diameter in the gel begins to become smaller, and the gel network structure becomes complex and disordered, resulting in an irreversible decrease in water-holding capacity and a decrease in the rehydration ability of the gel. The difference between the initial water absorption and the rehydration ability causes the complex system in the paint film to form connected long-term permeable pore channels in the paint film after drying. Since the water-holding ability of the complex system decreases, secondary water absorption will not block the permeable pore channels, and dissolution and re-combination with calcium ions will occur, increasing the flow area of the permeable pore channels again without damaging other organic phase solidified bodies. Therefore, the paint film has good water permeability. In addition, the addition of calcium lactate promotes the cross-linking and curing of the resin, enhances the curing strength of the resin, and further improves the wear resistance and adhesion of the paint film. Therefore, adding calcium lactate and high-ester pectin to the raw materials of the permeable floor paint in this application can endow the permeable floor paint with excellent water permeability and enhance the wear resistance and adhesion of the permeable floor paint.

[0016] Optionally: It also includes 1.2 - 3.4 parts of microcrystalline cellulose.

[0017] By adopting the above technical solutions, microcrystalline cellulose can swell under weakly alkaline conditions and is insoluble and does not swell under weakly acidic and neutral conditions; after the permeable floor paint is mixed, microcrystalline cellulose swells. On the one hand, it increases the fine micropores in the cured paint film and enhances the connection between the pores formed by the pore-forming agent; on the other hand, it can play an emulsifying role, promoting the uniform mixing and dispersion stability of the resin, pigment, and pore-forming agent, improving the self-leveling effect and film strength of the floor paint.

[0018] Optionally: It also includes 4.5 - 6.1 parts of monoglycidyl-terminated polysiloxane.

[0019] By adopting the above technical solutions, monoglycidyl-terminated polysiloxane can promote the mixing and dispersion of inorganic solids, complex systems, and organic resins in the permeable floor paint, and can enhance the strength of the paint film itself and the bonding strength between the paint film and the concrete after curing, improving the water permeability, adhesion, and wear resistance of the cured paint film.

[0020] Optionally: It also includes 3.0 - 4.1 parts of modified zinc oxide modified with a silane coupling agent.

[0021] By adopting the above technical solutions, the addition of modified zinc oxide can change the stacking structure of organic resins and complex systems in the paint film. With a limited amount of the complex system, there are more pore channels in the paint film and they are interconnected, resulting in better water permeability of the paint film and further improvement in the wear resistance of the paint film.

[0022] Optionally: The modified zinc oxide is modified zinc oxide whiskers.

[0023] By adopting the above technical solution, the four-needle zinc oxide whiskers have a better effect on fixing the composite system and regulating the stacking during the curing of the permeable floor paint into a paint film, and the fixing is more stable. Therefore, the obtained 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 pores.

[0024] Optionally: It further includes 8-12 parts of modified porous material, and the modified porous material is obtained by co-ball milling porous material and pregelatinized starch in a dispersion medium.

[0025] By adopting the above technical solution, adding an appropriate amount of porous material in this application can also change the stacking structure of the organic resin and composite system in the paint film, making the paint film have better water permeability and further improving the wear resistance of the paint film. And by modifying the porous material, it can reduce the blockage of the pores at the inlet and outlet of the surface of the porous material by the organic resin. Although it cannot reach the pore channel flux provided by the composite system, it can still be used as a supplementary improvement to enhance the water permeability of the paint film. Optionally: The dispersion medium used for co-ball milling the porous material and pregelatinized starch is a mixture of polyethylene glycol, water, and ethanol.

[0026] By adopting the above technical solution, the modification effect of the porous material is better, the pregelatinized starch component has a larger embedded coverage on the surface of the porous material, and it is more likely to dissolve out when contacting water subsequently to open the pores on the surface of the porous material, and the water permeability of the paint film is better.

[0027] The second above-mentioned object of the present invention is achieved by the following technical solution:

[0028] A preparation method of a permeable floor paint, comprising the following steps:

[0029] Mix high-ester pectin with water, and after the high-ester pectin absorbs water, add water again for crushing to obtain material A;

[0030] Mix material A with the remaining other raw materials to obtain the permeable floor paint.

[0031] By adopting the above technical solution, the high-ester pectin first fully absorbs water to form a gel, and then the gel forms a composite system with calcium ions, avoiding the reduction of pore channels caused by the premature influence of the local high calcium ion concentration environment on the water absorption of the composite system during the mixing preparation.

[0032] In summary, this application has at least the following beneficial effects:

[0033] 1. Adding calcium lactate and high-ester pectin to the raw materials of the permeable floor paint can endow the permeable floor paint with excellent water permeability, and enhance the wear resistance and adhesion of the permeable floor paint;

[0034] 2. The modified zinc oxide is modified zinc oxide whiskers. Its addition can change the stacking structure of the organic resin and the complex system in the paint film. With a limited amount of the complex system, there are more pore channels in the paint film, which are interconnected, the water permeability of the paint film is better, and the wear resistance of the paint film is further improved;

[0035] 3. Adding modified zinc oxide changes the stacking structure of the organic resin and the complex system in the paint film. With a limited amount of the complex system, there are more pore channels in the paint film, which are 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 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 and block the holes. Specific Embodiments

[0036] Raw Materials

[0037] The pigment is iron red paste, which is a commercially available pigment paste;

[0038] The waterborne modified epoxy resin is Kedingshi resin MR1487W waterborne acrylic modified resin;

[0039] The amine regulator is hexamethylenediamine;

[0040] The wetting agent is BYK-161;

[0041] The mono-glycidyl end-capping is poly(dimethylsiloxane)-mono-glycidyl ether end-capping, CAS: 157723-26-7, which is a commercially available industrial product;

[0042] The zinc oxide includes zinc oxide powder and zinc oxide whiskers. The particle size of the zinc oxide powder is 3 ± 0.5 μm, and the zinc oxide whiskers are four-needle type, with a diameter of 4 μm, a length of 20 μm, and an apparent density of 0.21 g / cm3;

[0043] The porous material is obtained by mixing diatomite and kaolin in a mass ratio of 1:0.21. The particle size of the diatomite is 3 ± 0.5 μm;

[0044] Ethylene glycol, calcium lactate, starch, and ethanol are all commercially available industrial products. The fineness of both calcium lactate and starch is 500 nm;

[0045] The high-ester pectin is a product of Jiangsu Baoshi Jia Biotechnology Co., Ltd., with a purity of 99 wt%, an esterification degree of 67.8%, a gel strength of 171, and a total galacturonic acid of 84.5%.

[0046] The pregelatinized starch is obtained by uniformly mixing starch and water at a mass ratio of 1:2.4 and then stirring and pregelatinizing at 43°C for 45 minutes.

[0047] Preparation Example 1

[0048] A modified zinc oxide, and its preparation method is as follows:

[0049] Mix dimethyldimethoxysilane and ethanol at a mass ratio of 13:100 to obtain a modification solution;

[0050] Mix zinc oxide whiskers and the modification solution at a mass ratio of 32:113, then heat to 35°C, stir and add 12.5 wt% ammonia water to adjust, adjust the pH to 8.2, and keep the temperature for reaction for 1 h;

[0051] Cool to room temperature, stand for 12 h, then filter and dry to obtain the modified zinc oxide.

[0052] Preparation Example 2

[0053] A modified zinc oxide, and its preparation method is as follows:

[0054] Mix dimethyldimethoxysilane and ethanol at a mass ratio of 13:100 to obtain a modification solution;

[0055] Mix zinc oxide powder and the modification solution at a mass ratio of 32:113, then heat to 35°C, stir and add 12.5 wt% ammonia water to adjust, adjust the pH to 8.2, and keep the temperature for reaction for 1 h;

[0056] Cool to room temperature, stand for 12 h, then filter and dry to obtain the modified zinc oxide

[0057] Preparation Example 3

[0058] A modified porous material, and its preparation method is as follows:

[0059] Put the porous material, pregelatinized starch, and dispersion medium into a ball mill at a mass ratio of 10:2.3:15, mix and ball mill for 1 h, then filter and dry the filtrate to obtain the modified porous material.

[0060] The dispersion medium is obtained by mixing polyethylene glycol, water, and ethanol at a mass ratio of 1.2:100:64.

[0061] Preparation Example 4

[0062] A modified porous material, and its preparation method is as follows:

[0063] Put the porous material, pregelatinized starch, and dispersion medium into a ball mill at a mass ratio of 10:2.3:15, mix and ball mill for 1 h, then filter and dry the filtrate to obtain the modified porous material.

[0064] The dispersion medium is obtained by mixing water and ethanol in a mass ratio of 100:64.

[0065] Example 1

[0066] A permeable floor paint, the raw materials of which are pigment, waterborne modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, calcium lactate, high-ester pectin, microcrystalline cellulose, and mono-glycidyl-terminated polysiloxane.

[0067] The preparation method of the permeable floor paint is as follows:

[0068] Mix 3.6 kg of high-ester pectin with 10 kg of water evenly, let it stand for 6 h, and then put it into a ball mill together with 40 kg of water and ball mill until the sieve retention rate is less than 1.5 wt% when passing through a 10-μm sieve to obtain material A;

[0069] Mix material A, 180 kg of water, 80 kg of pigment, and 450 kg of waterborne modified epoxy resin evenly to obtain material B;

[0070] Mix 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 mono-glycidyl-terminated polysiloxane evenly by stirring to obtain the permeable floor paint.

[0071] Comparative Example 1

[0072] A permeable floor paint, the raw materials of which are pigment, waterborne modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, microcrystalline cellulose, and mono-glycidyl-terminated polysiloxane.

[0073] The preparation method of the permeable floor paint is as follows:

[0074] Mix 230 kg of water, 80 kg of pigment, and 450 kg of waterborne modified epoxy resin evenly to obtain material B;

[0075] Mix 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 mono-glycidyl-terminated polysiloxane evenly by stirring to obtain the permeable floor paint.

[0076] Comparative Example 2

[0077] A permeable floor paint, the raw materials of which are pigment, waterborne modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, calcium lactate, microcrystalline cellulose, and mono-glycidyl-terminated polysiloxane.

[0078] The preparation method of the permeable floor paint is as follows:

[0079] Mix 230 kg of water, 80 kg of pigment, and 450 kg of waterborne modified epoxy resin evenly to obtain material B;

[0080] Mix 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 evenly to obtain a permeable floor paint.

[0081] Comparative Example 3

[0082] A permeable floor paint, whose raw materials are pigment, waterborne modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, high-ester pectin, microcrystalline cellulose, and monoglycidyl-terminated polysiloxane.

[0083] The preparation method of the permeable floor paint is as follows:

[0084] Mix 3.6 kg of high-ester pectin with 10 kg of water evenly, let it stand for 6 h, and then put it into a ball mill with 40 kg of water and ball mill until the sieve retention rate is less than 1.5 wt% when passing through a 10-μm sieve to obtain material A;

[0085] Mix material A, 180 kg of water, 80 kg of pigment, and 450 kg of waterborne modified epoxy resin evenly to obtain material B;

[0086] Mix 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 evenly to obtain a permeable floor paint.

[0087] Comparative Example 4

[0088] A permeable floor paint, whose raw materials are pigment, waterborne modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, porous material, microcrystalline cellulose, and monoglycidyl-terminated polysiloxane.

[0089] The preparation method of the permeable floor paint is as follows:

[0090] Mix 230 kg of water, 80 kg of pigment, and 450 kg of waterborne modified epoxy resin evenly to obtain material B;

[0091] Mix 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 evenly to obtain a permeable floor paint.

[0092] Comparative Example 5

[0093] A permeable floor paint, whose raw materials are pigment, waterborne modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, porous material, microcrystalline cellulose, and monoglycidyl-terminated polysiloxane.

[0094] The preparation method of the permeable floor paint is as follows:

[0095] After uniformly mixing 230 kg of water, 80 kg of pigment, and 450 kg of waterborne modified epoxy resin, material B is obtained;

[0096] Mix 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 evenly to obtain the permeable floor paint.

[0097] Comparative Example 6

[0098] A kind of permeable floor paint, which is different from Example 1 in that calcium chloride in equimolar amount is used to replace calcium lactate.

[0099] Comparative Example 7

[0100] A kind of permeable floor paint, which is different from Example 1 in that calcium hydroxide in equimolar amount is used to replace calcium lactate.

[0101] Example 2

[0102] A kind of permeable floor paint, which is different from Example 1 in that the dosage of microcrystalline cellulose is 1.2 kg.

[0103] Example 3

[0104] A kind of permeable floor paint, which is different from Example 1 in that the dosage of microcrystalline cellulose is 3.4 kg.

[0105] Example 4

[0106] A kind of permeable floor paint, which is different from Example 1 in that the dosage of microcrystalline cellulose is 0 kg.

[0107] Example 5

[0108] A kind of permeable floor paint, which is different from Example 1 in that the dosage of monoglycidyl-terminated polysiloxane is 4.5 kg.

[0109] Example 6

[0110] A kind of permeable floor paint, which is different from Example 1 in that the dosage of monoglycidyl-terminated polysiloxane is 6.1 kg.

[0111] Example 7

[0112] A kind of permeable floor paint, which is different from Example 1 in that the dosage of monoglycidyl-terminated polysiloxane is 0 kg.

[0113] Example 8

[0114] A permeable floor paint, which is different from that of Example 1 in that the raw materials are pigments, waterborne modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, calcium lactate, high-ester pectin, microcrystalline cellulose, monoglycidyl-terminated polysiloxane, and modified zinc oxide.

[0115] The preparation method is as follows:

[0116] Mix 3.6 kg of high-ester pectin with 10 kg of water evenly, let it stand for 6 h, and then put it into a ball mill together with 40 kg of water and ball mill until the sieve retention rate is less than 1.5 wt% when passing through a 10-μm sieve to obtain Material A;

[0117] Mix Material A, 180 kg of water, 80 kg of pigments, and 450 kg of waterborne modified epoxy resin evenly to obtain Material B;

[0118] Mix 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 evenly to obtain the permeable floor paint.

[0119] The modified zinc oxide is prepared as obtained in Preparation Example 1.

[0120] Example 9

[0121] A permeable floor paint, which is different from that of Example 8 in that the amount of modified zinc oxide is 3.6 kg.

[0122] Example 10

[0123] A permeable floor paint, which is different from that of Example 8 in that the amount of modified zinc oxide is 4.1 kg.

[0124] Example 11

[0125] A permeable floor paint, which is different from that of Example 8 in that the amount of modified zinc oxide is 5.6 kg.

[0126] Example 12

[0127] A permeable floor paint, which is different from that of Example 9 in that the modified zinc oxide is prepared as obtained in Preparation Example 2.

[0128] Example 13

[0129] A permeable floor paint, the raw materials of which are pigments, waterborne modified epoxy resin, water, amine regulator, wetting agent, ethylene glycol, calcium lactate, high-ester pectin, microcrystalline cellulose, monoglycidyl-terminated polysiloxane, and modified porous materials.

[0130] The preparation method of the permeable floor paint is as follows:

[0131] Mix 3.6 kg of high-ester pectin evenly with 10 kg of water, let it stand for 6 h, then put it into a ball mill together with 40 kg of water and mill until the sieve retention rate is less than 1.5 wt% when passing through a 10-μm sieve to obtain Material A;

[0132] Mix Material A, 180 kg of water, 80 kg of pigment, and 450 kg of waterborne modified epoxy resin evenly to obtain Material B;

[0133] Mix 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 evenly to obtain permeable floor paint.

[0134] The modified porous material is obtained by the preparation method of Preparation Example 3.

[0135] Example 14

[0136] A kind of permeable floor paint, which is different from Example 13 in that the modified porous material is obtained by the preparation method of Preparation Example 4.

[0137] Example 15

[0138] A kind of permeable floor paint, which is different from Example 13 in that porous material of equal mass is used to replace the modified porous material.

[0139] Example 16

[0140] A kind of permeable floor paint, which is different from Example 13 in that the raw material dosages are different, specifically as follows:

[0141] Pigment 76 kg, waterborne modified epoxy resin 450 kg, water 257 kg (the water used when mixing Material B with other raw materials is 27 kg), amine regulator 1.8 kg, wetting agent 1.9 kg, ethylene glycol 4.6 kg, calcium lactate 2.5 kg, high-ester pectin 3.2 kg, microcrystalline cellulose 3.4 kg, monoglycidyl-terminated polysiloxane 4.5 kg, modified porous material 12 kg.

[0142] Example 17

[0143] A kind of permeable floor paint, which is different from Example 13 in that the raw material dosages are different, specifically as follows:

[0144] Pigment 81 kg, waterborne modified epoxy resin 450 kg, water 263 kg (the water used when mixing Material B with other raw materials is 33 kg), amine regulator 2.1 kg, wetting agent 2.2 kg, ethylene glycol 5.3 kg, calcium lactate 3 kg, high-ester pectin 4 kg, microcrystalline cellulose 1.2 kg, monoglycidyl-terminated polysiloxane 6.1 kg, modified porous material 8 kg.

[0145] Example 18

[0146] A permeable floor paint, which is different from Example 9 in the dosage of raw materials, specifically as follows:

[0147] Pigment 76 kg, waterborne modified epoxy resin 450 kg, water 257 kg (27 kg of water is used when material B is mixed with other raw materials), amine regulator 1.8 kg, wetting agent 1.9 kg, ethylene glycol 4.6 kg, calcium lactate 2.5 kg, high-ester pectin 3.2 kg, microcrystalline cellulose 3.4 kg, monoglycidyl-terminated polysiloxane 4.5 kg, modified zinc oxide 4.1 kg.

[0148] Example 19

[0149] A permeable floor paint, which is different from Example 9 in the dosage of raw materials, specifically as follows:

[0150] Pigment 81 kg, waterborne modified epoxy resin 450 kg, water 263 kg (33 kg of water is used when material B is mixed with other raw materials), amine regulator 2.1 kg, wetting agent 2.2 kg, ethylene glycol 5.3 kg, calcium lactate 3 kg, high-ester pectin 4 kg, microcrystalline cellulose 1.2 kg, monoglycidyl-terminated polysiloxane 6.1 kg, modified zinc oxide 3 kg.

[0151] The permeable floor paints obtained in Examples 1 to 19 and Comparative Examples 1 to 6 were tested for water permeability, abrasion resistance and adhesion.

[0152] Water permeability: During the research process of this application, it is usually tested and learned from the material "Su Na, Wang Chongwu. Discussion on influencing factors of water permeability test of exterior wall coatings [J]. China Coatings, 2021, 36(5): 7. DOI: 10.13531." that when testing the water permeability after coating the paint on the permeable concrete slab, the water permeability results are greatly affected by the water content and curing conditions of the permeable concrete slab, resulting in large deviations in the test results. Therefore, this application draws on the improvement idea of the water permeability method of building exterior wall coatings.

[0153] Apply a layer of wax on the flat glass according to the standard regulations, and then apply the coating on the wax. After the coating film is dried, carefully scrape the coating film off the glass bottom plate, and then place the water permeability test device (funnel) in the middle of the coating film in the same way as specified in GB / T 9755-2014, and seal it with a non-absorbent sealing material. Since the coating film is relatively thin, when water is injected into the funnel, the coating film and the funnel coating film may sag. Therefore, fix the coating film and the funnel in a stainless steel sieve. After the sealing material is dried, slowly inject water into the water permeability test device. In this way, the coating film will not sag and the water passing through the coating film can still flow out freely. Add water until the 0 mL scale of the test tube, confirm that there are no bubbles in the container, and wrap the top of the glass tube with tinfoil. After standing for 90 minutes in the standard environment (25°C, standard atmospheric pressure), observe and record the milliliter number of the liquid level drop as the water seepage volume. The greater the water seepage volume, the stronger the water permeability.

[0154] Abrasion resistance: Test according to "HG / T 6088-2022 Coating for Permeable Road". The result is expressed by the wear amount. The less the wear amount, the better the abrasion resistance.

[0155] Adhesion: Test according to "HG / T 6088-2022 Coating for Permeable Road". The pull-off method is adopted. The result is expressed by the peel strength (MPa). The greater the peel strength, the stronger the adhesion.

[0156] The test results are shown in the following table.

[0157] Table 1. Test Results of Examples 1-19 and Comparative Examples 1-7

[0158]

[0159]

[0160] Combined with Table 1, it can be seen by comparing Example 1 with Comparative Examples 1-3 that:

[0161] The raw materials of the permeable floor paint in Example 1 include calcium lactate and high-ester pectin. After high-ester pectin fully absorbs water, it is ball-milled into a slurry - Material A. Then, mix Material A evenly with waterborne epoxy resin, water, and pigments to obtain Material B. Then, mix Material B evenly with the remaining raw materials.

[0162] Comparative Example 1 does not add calcium lactate and high-ester pectin compared with Example 1, and only uses the water used for Material A to replace Material A. The water permeability of Comparative Example 1 is significantly lower than that of Example 1, and the abrasion resistance and adhesion of Comparative Example 1 are lower than those of Example 1.

[0163] The raw materials of Comparative Example 2 included calcium lactate but no high-ester pectin. Calcium lactate was mixed with Material B in the last step. The water permeability of Comparative Example 2 was significantly lower than that of Example 1 and was similar to that of Comparative Example 1. The abrasion resistance and adhesion of Comparative Example 2 were lower than those of Example 1.

[0164] The raw materials of Comparative Example 3 included high-ester pectin but no calcium lactate. The water permeability of Comparative Example 3 was significantly lower than that of Example 1 and lower than that of Comparative Example 1. The abrasion resistance and adhesion of Comparative Example 3 were lower than those of Example 1.

[0165] After adding calcium lactate and high-ester pectin to the raw materials of the permeable floor paint of Example 1, the synergistic effect of calcium lactate and high-ester pectin - 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, calcium ions combine with the gel formed by high-ester pectin to form a complex system; after the water-based floor paint is coated and the water evaporates, the liquid phase environment of the permeable floor paint is alkaline at this time, and the calcium ion concentration in the liquid phase continuously increases until the solubility threshold, and the complex system begins to gradually form aggregates, the pore diameter in the gel begins to become smaller, and the gel network structure becomes complex and disordered, resulting in an irreversible decrease in water holding capacity and a decrease in the rehydration ability of the gel.

[0166] The difference between the initial water absorption and the rehydration ability causes the complex system in the paint film to form connected long-term permeable pore channels after drying in the paint film. Since the water holding capacity of the complex system decreases, it will not block the permeable pore channels when absorbing water again, and will dissolve out and combine with calcium ions again, increasing the flow area of the permeable pore channels again without damaging other organic phase solidified bodies. Therefore, the paint film has good water permeability. In addition, the addition of calcium lactate promotes the cross-linking and curing of the resin, enhances the curing strength of the resin, and thus improves the abrasion resistance and adhesion of the paint film.

[0167] Combined with Comparative Examples 4-5, the raw materials of the permeable floor paint in Comparative Examples 4-5 did not add calcium lactate and high-ester pectin, but added porous materials, and the amount of porous materials added in Comparative Example 5 was greater than that in Comparative Example 4. The water permeability, abrasion resistance and adhesion of Comparative Example 4 were improved compared with those of Comparative Example 1, but they were still inferior to those of Example 1.

[0168] The water permeability of Comparative Example 5 was greater than that of Comparative Example 1, Comparative Example 4 and was close to that of Example 1. However, the abrasion resistance and adhesion of Comparative Example 5 were not only significantly less than those of Example 1, but also less than those of Comparative Example 4. The reason is that in Comparative Example 5, by increasing the proportion of porous materials, the water permeability of the final paint film was improved, but too much porous material was added, resulting in a decrease in the coating uniformity of the paint film, a decrease in the internal bonding strength of the paint film after coating and curing, and a decrease in the bonding strength to the substrate. Therefore, the abrasion resistance and adhesion decreased significantly.

[0169] It can be seen from this that the water-permeable floor paint of Example 1 has no weaker water permeability performance than that of the water-permeable floor paint improved by adding porous materials, and when obtaining better water permeability, the water-permeable floor paint of Example 1 is superior in wear resistance and adhesion.

[0170] Combined with Comparative Examples 6-7, the calcium ion source for the gel-forming complex system of high-ester pectin is a specific choice of calcium lactate. In Comparative Example 6, an equimolar amount of calcium chloride was used to replace calcium lactate, and in Comparative Example 7, an equimolar amount of calcium hydroxide was used to replace calcium lactate.

[0171] 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 complex system, causing the complex system to decompose and dehydrate slowly during the preparation and storage of the water-permeable floor paint, resulting in a weak water permeability of the cured paint film. In addition, chloride ions interfere with the cross-linking of epoxy resin and damage the epoxy resin molecular chain, resulting in a decrease in the wear resistance and adhesion of the cured paint film.

[0172] The wear resistance of Comparative Example 7 is improved compared to Example 1, but the adhesion and water permeability are lower than those of Example 1. In addition, during the observation of the coating film formation 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. Calcium hydroxide will gradually transform into calcium carbonate, initially forming a film more and filling 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, calcium lactate and high-ester pectin are selected for compounding and use in this application.

[0173] In summary, adding calcium lactate and high-ester pectin to the raw materials of the water-permeable floor paint in this application can endow the water-permeable floor paint with excellent water permeability, and enhance the wear resistance and adhesion of the water-permeable floor paint.

[0174] Comparing Examples 1-4, it can be seen that in Examples 1-3, microcrystalline cellulose was also added to the raw materials. Microcrystalline cellulose can swell under weakly alkaline conditions, so it swells after the water-permeable floor paint is mixed. On the one hand, it increases the fine micropores in the cured paint film and enhances the connectivity between the pores formed by the pore-forming agent; on the other hand, it can play an emulsifying role, promoting the uniform mixing and dispersion stability of the resin, pigment, and pore-forming agent, and improving the self-leveling effect and film strength of the floor paint. Therefore, in the test results, the water permeability, wear resistance, and adhesion of Examples 1-3 are all superior to those of Example 4.

[0175] Comparing Comparative Example 1 with Examples 5 to 7, it can be seen that in Examples 1 and 5 to 6, monoglycidyl-terminated polysiloxane is added to the raw materials compared with Example 7. Monoglycidyl-terminated polysiloxane can promote the mixing and dispersion of inorganic solids, the complex system, and organic resin in the permeable floor paint. After curing, it can enhance the strength of the paint film itself and the bonding strength between the paint film and the concrete, 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 5 to 6 are better than those of Example 7, which can be verified accordingly.

[0176] Comparing Comparative Example 1 with Examples 8 to 10, it can be seen that in Examples 8 to 10, modified zinc oxide is added on the basis of Example 1. The modified zinc oxide is modified zinc oxide whiskers. Its addition can change the stacking structure of organic resin and the complex system in the paint film. With a limited amount of the complex system, there are more pore channels in the paint film and they are interconnected, so 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 and block the holes.

[0177] Combined 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 decreases compared with Example 10, the wear resistance of Example 11 improves less compared with Example 10, and the adhesion of Example 11 does not improve compared with Example 10. Therefore, it is better to control the mass ratio of the addition amount of modified zinc oxide to the amount of waterborne modified epoxy resin in this application to (3.1 - 4.0):450.

[0178] Comparing Example 9 with Example 12, it can be seen that the modified zinc oxide used in Example 12 is modified zinc oxide powder instead of 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 those of Example 9. The reason is that the complex system is a gel. Compared with granular zinc oxide powder, four-needle zinc oxide whiskers have a better fixing effect on the complex system and a better stacking adjustment effect during the curing of the permeable floor paint into a paint film, and the fixing is more stable. Therefore, the water permeability and wear resistance of the obtained paint film are relatively better.

[0179] Comparing Comparative Example 1 with Examples 12 to 15, it can be seen that:

[0180] In Example 13, the modified porous material prepared in Preparation Example 3 is added compared with Example 1, and the mass 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.

[0181] In Example 14, the modified porous material prepared in Preparation Example 4 was added compared with Example 1, and the dosage quality was less than that of the porous material used in Comparative Example 4; in the test results, the abrasion resistance and adhesion of Example 14 and Example 12 were similar, and the water permeability of Example 14 was lower than that of Example 13 but better than that of Example 12.

[0182] In Example 15, no modified porous material was added, but porous material was directly added, and the dosage quality of the porous material was equal to that of the modified porous material 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 Example 12, and due to uneven dispersion, the water permeability and abrasion resistance decreased.

[0183] In summary, it can be seen that adding an appropriate amount of porous material in this application can also change the stacking structure of the organic resin and the compound system in the paint film, making the water permeability of the paint film better and the abrasion resistance of the paint film further improved. And by modifying the porous material, the blockage of the surface holes of the porous material by the organic resin can be reduced. Although the pore channel flux provided by the compound system cannot be achieved, it can still be used as a supplementary improvement to enhance the water permeability of the paint film.

[0184] Combined with Examples 16-19, in the test results, compared with Comparative Examples 1-4, Examples 16-19 showed significantly excellent water permeability, abrasion resistance and adhesion. Therefore, when the mass ratio of the raw material dosage of the permeable floor paint in this application is controlled as follows: pigment: waterborne 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 = (76-81): 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): (3.0-4.1), or pigment: waterborne modified epoxy resin: water: amine regulator: wetting agent: ethylene glycol: calcium lactate: high-ester pectin: microcrystalline cellulose: monoglycidyl-terminated 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, abrasion resistance and adhesion.

[0185] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as they are within the scope required to be protected by the present invention, they are protected by the patent law.

Claims

1. A permeable floor paint, characterized in that: It is composed of the following raw materials in parts by weight: 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, 1.2~3.4 parts of microcrystalline cellulose, 4.5-6.1 parts of monoglycidyl terminated polysiloxane, 3.0-4.1 parts of modified zinc oxide modified by a silane coupling agent, wherein the modified zinc oxide is a modified zinc oxide whisker; The preparation method of the 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.

2. A permeable floor paint, characterized in that: It is composed of the following raw materials in parts by weight: 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, 1.2~3.4 parts of microcrystalline cellulose, 4.5-6.1 parts of monoglycidyl terminated polysiloxane, 8-12 parts of modified porous material; The modified porous material is obtained by ball-milling the porous material and pregelatinized starch in a dispersion medium. The preparation method of the 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.

3. A water-permeable floor paint according to claim 2, 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.

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