CN111423759A - Exterior wall waterproof putty and preparation method thereof - Google Patents
Exterior wall waterproof putty and preparation method thereof Download PDFInfo
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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Abstract
The invention relates to the technical field of building exterior wall decorative materials, in particular to exterior wall waterproof putty and a preparation method thereof, wherein the exterior wall waterproof putty is prepared from waterproof putty powder and water according to the weight ratio of 10: (3-4), wherein the waterproof putty powder is prepared from the following raw materials in parts by weight: 400 parts of white cement, 350 parts of ash calcium powder, 150 parts of fly ash, 250 parts of double flying powder, 15-30 parts of aluminum magnesium silicate thixotropic lubricant, 3-10 parts of cellulose, 10-25 parts of hydrophobic white carbon black, 3-8 parts of sodium polyacrylate, 5-15 parts of algin and 15-30 parts of redispersible emulsion powder, wherein the weight ratio of the algin to the redispersible emulsion powder is 1: (2-4); the waterproof putty of the invention has excellent waterproof and anti-cracking performance.
Description
Technical Field
The invention relates to the technical field of building exterior wall decoration materials, in particular to exterior wall waterproof putty and a preparation method thereof.
Background
The putty is a surface filling material for preprocessing a construction surface before the surface paint construction of a building wall, fills the pores of the construction surface and corrects the curve deviation of the construction surface, and lays a foundation for obtaining a uniform and smooth paint surface. The putty can be divided into waterproof putty and wall putty according to the performance, and can be divided into inner wall putty and outer wall putty according to the construction surface.
The exterior wall putty is used outdoors and is used as a base layer of wall emulsion paint or coating and the like, and the exterior wall putty is required to have better water resistance. Although the wall surface can not be soaked by water, water vapor always exists in the air, the wall surface is exposed in the air and cannot be corroded by the water vapor anytime, the wall surface is long in service life due to good water resistance, and the wall surface is short in service life due to poor water resistance, namely the protective layer of the wall surface can fall off earlier. Different from common wall putty batches, the bonding strength of the waterproof putty can reach more than 0.5MPa, which is more than 2 times of that of common wall putty batches. After being soaked in water for 48 hours, the drawing strength of the water-resistant putty is still higher than 0.3MPa, while the drawing strength of the common wall putty is reduced to 0MPa and falls off.
The bonding strength of the traditional water-resistant putty mainly depends on a main component, namely a cementing material, and the cementing material is cement or gypsum, belongs to a rigid product, and has poor flexibility and poor air permeability and anti-cracking performance.
The invention patent application with the grant publication number of CN 102875085B discloses exterior wall waterproof putty powder, which consists of the following raw materials in percentage by weight: 15-35% of kaolin powder, 10-20% of sepiolite powder, 20-40% of portland cement, 5-15% of gypsum powder, 1-6% of hydroxypropyl methyl cellulose, 2-20% of polished round-grained rice gel powder and 0.5-4% of cold-melt polyvinyl alcohol gel powder, wherein the polished round-grained rice gel powder is prepared according to the following method: adding water 3-8 times the weight of semen oryzae Sativae as raw material, decocting to obtain slurry, filtering to remove non-slurry, cooling, drying, and grinding into powder with fineness of 140 mesh or less. The prior art has stronger cohesiveness and has no phenomena of hollowing and falling off after being affected with water and damp.
However, the above-mentioned prior art has the following problems: firstly, cement, kaolin powder and gypsum powder are used as main cementing materials, and are used for binding with the gel powder, so that the hardened compactness is high, the air permeability is poor, water vapor is difficult to discharge from a wall body after the wall body is wetted by water, and the service life of a wall surface protective layer is relatively reduced; secondly, hydroxypropyl methylcellulose is used as a thickening agent, which has little or no effect on the main cementing material gypsum powder, while in the prior art, only hydroxypropyl methylcellulose is used as the thickening agent, which easily causes powder falling and relatively reduces the cracking resistance of the water-resistant putty.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide the exterior wall waterproof putty which has better waterproof and anti-cracking properties.
The second purpose of the invention is to provide another exterior wall water-resistant putty which has more excellent water resistance and cracking resistance.
The third purpose of the invention is to provide a preparation method of the exterior wall water-resistant putty of the first purpose.
The fourth purpose of the invention is to provide a preparation method of the exterior wall water-resistant putty of the second purpose.
The first object of the present invention is achieved by the following technical solutions:
the exterior wall waterproof putty is prepared from waterproof putty powder and water according to the weight ratio of 10: (3-4), wherein the waterproof putty powder is prepared from the following raw materials in parts by weight: 400 parts of white cement, 350 parts of ash calcium powder, 150 parts of fly ash, 250 parts of double flying powder, 15-30 parts of aluminum magnesium silicate thixotropic lubricant, 3-10 parts of cellulose, 10-25 parts of hydrophobic white carbon black, 3-8 parts of sodium polyacrylate, 5-15 parts of algin and 15-30 parts of redispersible emulsion powder, wherein the weight ratio of the algin to the redispersible emulsion powder is 1: (2-4).
By adopting the technical scheme, the white cement has the characteristics of white and fine color, high strength, good adhesive force, large cohesive force and cracking resistance, and can enhance the water resistance and later strength of the water-resistant putty powder. The main component of the sierozem powder is CaO, and the strength of the putty powder can be improved through a series of complex reactions of the sierozem powder in water and carbon dioxide. Shuangfei powder, also called big white powder, contains calcium carbonate as the component. The aluminum magnesium silicate thixotropic lubricant can form a cabin-type structure in an aqueous system, so that the basic viscosity of the system is improved; the water-absorbing agent can absorb water to swell and quickly disperse to form a three-dimensional network structure, can lock solid particles, and can form hydrogen bonds with cellulose to synergistically improve the viscosity of a system. The hydrophobic white carbon black is obtained by surface modification of white carbon black, has a large specific surface area, a surface porous structure and super-strong adsorption capacity, and can realize free inlet, outlet and exchange of water vapor while adsorbing solid particles in a system on the surface. The sodium polyacrylate is used as a dispersant of a cementing material on one hand, and has a good dispersing effect on hydrophobic white carbon black on the other hand, so that solid particles of a hydrophobic white carbon black adsorption system can be uniformly dispersed in the water-resistant putty, and the dispersed water-resistant putty powder is fully swelled in water by matching with cellulose, algin and re-dispersible latex powder to form the water-resistant putty with good compactness, strong air permeability, good bonding strength and good cracking resistance.
Preferably, the method comprises the following steps: the waterproof putty powder is prepared from the following raw materials in parts by weight: 350 parts of white cement, 300 parts of ash calcium powder, 200 parts of fly ash, 200 parts of magnesium aluminum silicate thixotropic lubricant, 15-30 parts of cellulose, 10-25 parts of hydrophobic white carbon black, 3-8 parts of sodium polyacrylate, 5-15 parts of algin and 15-30 parts of redispersible emulsion powder.
Preferably, the method comprises the following steps: the hydrophobic white carbon black is obtained by modifying gas-phase white carbon black by using dimethyldichlorosilane.
By adopting the technical scheme, the fumed silica has the characteristics of small particle size, large specific surface area and the like, and is widely applied to the fields of rubber, paint and the like with excellent stability, reinforcing property, thickening property and thixotropy. A large number of tests show that the hydrophobic white carbon black obtained by modifying the dimethyldichlorosilane can prevent the agglomeration of putty system materials and improve the water resistance and the air permeability of the putty system.
Preferably, the method comprises the following steps: before the fumed silica is modified, the fumed silica is subjected to pre-dispersion treatment according to the following steps: and adding a dispersing agent accounting for 13 percent of the total weight of the slurry under the conditions that the ball-to-material ratio is 4.5:1 and the concentration of the slurry is 2.6 percent, and carrying out superfine grinding on the fumed silica to obtain the milled fumed silica.
By adopting the technical scheme, because a plurality of hydroxyl groups exist on the surface of the fumed silica, the fumed silica is extremely easy to agglomerate twice or many times to form an agglomerate, which is not beneficial to the dispersion uniformity of the fumed silica in a system. The aggregate is dissociated by pre-dispersion treatment to obtain fumed silica particles with smaller particle size, so that the dispersion performance of the fumed silica particles in the putty system is improved.
Preferably, the method comprises the following steps: the dispersant is sodium polyacrylate.
Preferably, the method comprises the following steps: the cellulose includes lignocellulose and chitosan fibers.
By adopting the technical scheme, the lignocellulose is widely used in the fields of concrete mortar, gypsum products, putty powder, asphalt roads and the like, and has good effects of preventing coating cracking, improving water retention, improving production stability and workability of construction, enhancing adhesive force to the surface and the like. The chitosan fiber surface has a large amount of active groups such as hydroxyl, amino and the like, and has stronger adsorption effect. A large number of experiments show that the application of the lignocellulose and the chitosan fiber in the putty provided by the invention can not cause powder removal, and can relatively improve the cracking resistance of the putty.
Preferably, the method comprises the following steps: the redispersible latex powder is redispersible vinyl acetate/ethylene copolymer rubber powder.
By adopting the technical scheme, the redispersible vinyl acetate/ethylene copolymer rubber powder has good redispersibility, can be re-emulsified into stable polymer emulsion after being added with water, has chemical properties completely the same as those of the initial emulsion, and can improve the adhesive property, the wear resistance and the workability of a system without influencing the fluidity, the thixotropy or the water retention property.
The second invention purpose of the invention is realized by the following technical scheme:
the exterior wall waterproof putty powder comprises the following raw materials in parts by weight: 3-8 parts of silicon micro powder, 2-5 parts of sepiolite powder and 1-3 parts of palygorskite powder.
By adopting the technical scheme, the silicon micro powder has the characteristics of strong adsorption force, good wear resistance, chemical erosion resistance, uniform gap filling permeability, increased compactness of the putty and capability of preventing the putty from cracking. Sepiolite powder is a porous material with large specific surface area and adsorption capacity. The palygorskite has large specific surface area and adsorption capacity, good rheological property and ideal colloid performance and heat resistance; it is sticky and plastic when wet, is beneficial to the bonding between raw materials in a system, has small dry shrinkage rate, does not generate cracks, and can improve the adhesive force of the putty to a base surface. According to the invention, the silica micro powder, the sepiolite powder and the palygorskite are added into the original waterproof putty powder, the silica micro powder provides strength support, the palygorskite is used as a link for bonding the inorganic filler and the rubber powder, the sepiolite powder provides a ventilation channel, and the silica micro powder, the palygorskite and the rubber powder are matched with each other to form a rigid ventilation bonding material, so that the bonding performance of the putty is improved, and meanwhile, the ventilation property of the putty can be further improved.
The third invention purpose of the invention is realized by the following technical scheme:
a preparation method of exterior wall water-resistant putty comprises the following operation steps:
uniformly mixing the white cement, the sierozem powder, the double-flying powder and the aluminum magnesium silicate thixotropic lubricant to obtain a material A for later use; and adding 150% of water by weight of the sodium polyacrylate into the sodium polyacrylate, uniformly stirring, adding cellulose, hydrophobic white carbon black, algin and redispersible emulsion powder, uniformly stirring, adding the material A and the balance of water, and uniformly stirring to obtain the exterior wall waterproof putty.
By adopting the technical scheme, the sodium polyacrylate is mixed and dissolved in the water to form dispersion liquid, and then the cellulose, the hydrophobic white carbon black, the algin and the redispersible emulsion powder are added, so that the hydrophobic white carbon black and the cellulose interact to form dispersion with adsorption capacity which is uniformly dispersed in the mixture; and adding each gelled material, the aluminum magnesium silicate thixotropic lubricant and the balance of water into the mixture, and uniformly stirring to uniformly disperse the gelled materials in a system under the action of the dispersion to form the water-resistant putty.
The fourth invention purpose of the invention is realized by the following technical scheme:
a preparation method of exterior wall water-resistant putty comprises the following operation steps:
uniformly mixing the white cement, the sierozem powder, the double-flying powder and the aluminum magnesium silicate thixotropic lubricant to obtain a material B for later use; uniformly mixing the silicon micro powder, the sepiolite powder and the palygorskite powder to obtain a material C for later use; and adding 150 wt% of water into the sodium polyacrylate, uniformly stirring, adding the material C, the cellulose, the hydrophobic white carbon black, the algin and the redispersible latex powder, uniformly stirring, adding the material A and the balance of water, and uniformly stirring to obtain the exterior wall waterproof putty.
By adopting the technical scheme, the silicon micro powder, the sepiolite powder and the palygorskite powder are added into the dispersion, so that the porosity of the dispersion is further improved, and the air permeability of the water-resistant putty is further improved.
In summary, the invention includes at least one of the following beneficial technical effects:
(1) the exterior wall water-resistant putty of the invention has water resistance, alkali resistance and initial cracking resistance which all meet the standard requirements, and has excellent performance; the standard state of the bonding strength is more than 1.8MPa, and the highest bonding strength can reach 2.4 MPa; the freeze-thaw cycle is more than 0.9MPa for 5 times, and the maximum pressure can reach 1.5 MPa; the highest dynamic cracking resistance can reach 0.29 mm;
(2) the exterior wall water-resistant putty has excellent water resistance and cracking resistance durability, still has no bubbles, powder falling and cracking after being soaked for 140 hours, and has longer service life than the water-resistant putty in the prior art.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The raw materials are all commercial products, and concretely comprise white cement, ash calcium powder, double-flying powder and aluminum magnesium silicate thixotropic lubricant, wherein the white cement is selected from Shanghai circulating decorative material factories and has the granularity of 200 meshes, the ash calcium powder is selected from Yufeng ash calcium powder factories in pond areas in Guihong City and has the granularity of 250 meshes, the double-flying powder is selected from Hebei Shimao building materials Limited and has the granularity of 800 meshes, and the aluminum magnesium silicate thixotropic lubricant is selected from TEROGE L KW rheological aid and has the density of 1.68g/cm3The non-volatile content is 99%; the fumed silica is selected from Kabot silica M5, and has a specific surface area of 200M2The NK-218 redispersible latex powder is redispersible vinyl acetate/ethylene copolymer powder, the particle size of the silica powder is 350 meshes, the sepiolite powder is selected from L SXKY with the particle size of 325 meshes, the palygorskite powder is selected from Sichuan stone P L SF with the particle size of 325 meshes/g and the median particle size of 12nm, the sodium polyacrylate is selected from Shandongdelin sodium polyacrylate Derin 42N, the purity of the dimethyldichlorosilane is 99%, the lignocellulose is selected from Jinan aviation and Natural trade company Limited and has the length of 300 mu m, the chitosan fiber is selected from Zhengzhou Teweisi biological science and technology company Limited and has the content of active substances of 99%, the algin is selected from Hebei Chun Source biological science and technology Limited and has the product number of spj-1, and the redispersible latex powder is selected from Noke
Preparation example
The hydrophobic white carbon black is obtained by modifying gas-phase white carbon black by using dimethyldichlorosilane, and the specific operation is as follows:
1. pre-dispersing treatment of fumed silica: adding 13 percent of dispersant sodium polyacrylate by the total weight of the slurry under the conditions of 25 ℃, the rotating speed of 1700r/min, the ball-to-material ratio of 4.5:1 and the concentration of the slurry of 2.6 percent, and carrying out superfine grinding on the fumed silica for 100min to obtain the fumed silica with the dispersed median diameter of 7 mu m for later use;
2. adding the pre-dispersed fumed silica into dimethyldichlorosilane at 180 ℃, keeping the weight ratio of the fumed silica to the dimethyldichlorosilane at 1:4, performing modification treatment for 45min, cooling, filtering, and vacuum-drying the solid to obtain the hydrophobic silica.
Example 1
The exterior wall water-resistant putty is prepared by mixing water-resistant putty powder and water, wherein the water-resistant putty powder comprises white cement, sierozem powder, double-flying powder, aluminum magnesium silicate thixotropic lubricant, cellulose, hydrophobic white carbon black, sodium polyacrylate, algin and redispersible emulsion powder, and the specific mixing amount is shown in table 1; the exterior wall waterproof putty is prepared by the following operation steps:
according to the mixing amount shown in the table 1, uniformly mixing white cement, sierozem powder, double-flying powder and aluminum magnesium silicate thixotropic lubricant to obtain a material A for later use; adding 150 wt% (4.5g) of water into the sodium polyacrylate with the mixing amount shown in the table 1, uniformly stirring, adding the cellulose, the hydrophobic white carbon black, the algin and the redispersible latex powder of the preparation example, uniformly stirring, adding the material A and the balance of water, and uniformly stirring to obtain the exterior wall water-resistant putty.
Examples 2 to 5
The exterior wall water-resistant putty of the embodiments 2 to 5 has the same preparation method as that of the embodiment 1, and the difference is that the mixing amount of each raw material is different, and the details are shown in the table 1.
TABLE 1 amount of each raw material (unit: g) of the exterior wall water putty of examples 1-5
Examples 6 to 10
The exterior wall water-resistant putty of the embodiments 6 to 10 has the same preparation method as that of the embodiment 1, and the difference is that the mixing amount of each raw material is different, and the details are shown in table 2.
TABLE 2 amount of each raw material (unit: g) of the exterior wall water putty of examples 6-10
Examples 11 to 16
The exterior wall water-resistant putty of the embodiments 11 to 16 has the same preparation method as that of the embodiment 1, and the difference is that the mixing amount of each raw material is different, and the details are shown in table 3.
TABLE 3 amount of each raw material (unit: g) of the exterior wall water putty of examples 11 to 16
Examples 17 to 18
The exterior wall water-resistant putty of the embodiments 17 to 18 has the same preparation method as that of the embodiment 1, and the difference is that the mixing amount of each raw material is different, and the details are shown in table 4.
TABLE 4 amount of each raw material (unit: g) of exterior wall water putty of examples 17 to 18
Examples 19 to 21
The exterior wall water resistant putty of embodiments 19-21, wherein the water resistant putty powder further comprises silica micropowder, sepiolite powder and palygorskite powder, and the exterior wall water resistant putty powder is prepared by the following steps:
according to the mixing amount shown in table 5, white cement, sierozem powder, double-flying powder and aluminum magnesium silicate thixotropic lubricant are uniformly mixed to obtain a material B for later use; uniformly mixing the silicon micro powder, the sepiolite powder and the palygorskite powder to obtain a material C for later use; adding 150 wt% of water into sodium polyacrylate, stirring uniformly, adding the material C, cellulose, hydrophobic white carbon black, algin and redispersible latex powder, stirring uniformly, adding the material A and the balance of water, and stirring uniformly to obtain the exterior wall waterproof putty.
TABLE 5 amount of each raw material (unit: g) of exterior wall water putty of examples 19 to 21
Comparative example 1
In the invention patent application with the publication number of CN 102875085B, the exterior wall water-resistant putty powder of the embodiment 2 and water are mixed and stirred uniformly according to the weight ratio of 10:4 to obtain the exterior wall water-resistant putty.
Comparative example 2
The exterior wall water-resistant putty of the comparative example 2 is the same as the preparation method of the example 19, and the difference is that: the hydrophobic white carbon black in the raw material of the water-resistant putty powder is replaced by the same amount of fumed silica which is not subjected to the superfine grinding treatment, and the rest raw materials and the mixing amount are the same as those in the example 19.
Comparative example 3
The exterior wall water-resistant putty of the comparative example 3 is the same as the preparation method of the example 19, and the difference is that: the hydrophobic white carbon black in the raw material of the water-resistant putty powder is replaced by the same amount of the fumed silica which is not subjected to the superfine grinding treatment and is used as the raw material, the hydrophobic white carbon black is obtained by the same modification method as the preparation example, and the other raw materials and the mixing amount are the same as those in the example 19.
Comparative example 4
The exterior wall water-resistant putty of the comparative example 4 is the same as the preparation method of the example 19, and the difference is that: the same amount of the sodium polyacrylate in the raw material of the water-resistant putty powder was replaced with polyethylene glycol 800, and the rest was the same as in example 19.
Comparative example 5
The exterior wall water-resistant putty of the comparative example 5 is the same as the preparation method of the example 19, and the difference is that: the cellulose in the raw material of the water-resistant putty powder is hydroxypropyl methyl cellulose, and the rest is the same as that in the example 19.
Comparative example 6
The exterior wall water-resistant putty of the comparative example 6 has the same raw material composition as that of the exterior wall water-resistant putty of the example 19, and the preparation method is different, and specifically comprises the following steps: and (3) all the raw materials of the waterproof putty powder are uniformly mixed, water is added into the mixture at one time, and the mixture is uniformly stirred to obtain the waterproof putty powder.
Performance detection
The performance of the water-resistant putty of examples 1-21 and comparative examples 1-6 was tested by the test method and standard of JG/T229-. The indexes of the performances are as follows:
initial dry cracking resistance (6 h): no crack is generated;
water absorption/(g/10 min): less than or equal to 2.0;
water resistance (96 h): no bubble, no cracking and no powder falling;
alkali resistance (48 h): no bubble, no cracking and no powder falling;
adhesive strength/MPa: standard state, not less than 0.60; the freeze-thaw cycle is 5 times and is more than or equal to 0.40.
JG/T test method and standard, the dynamic cracking resistance (mm) test was performed on the water-resistant putty of examples 1-21 and comparative examples 1-6, and the test results are shown in Table 6; wherein, the technical indexes of the P type (common exterior wall putty) are base layer cracks: not less than 0.1mm and less than 0.3 mm; r type (flexible exterior wall putty) is a base layer crack: not less than 0.3 mm. Adopting 157 and 2004
TABLE 6 Performance test results for different water resistant putties
The detection results in Table 6 show that the exterior wall water-resistant putty of the invention has water resistance, alkali resistance and initial cracking resistance which all meet the standard requirements, and has excellent adhesive property and dynamic cracking resistance which are all superior to those of the prior art (comparative example 1); wherein the standard state of the bonding strength is more than 1.8MPa and can reach 2.4 MPa; the freeze-thaw cycle is more than 0.9MPa for 5 times, and the maximum pressure can reach 1.5 MPa; the dynamic cracking resistance can reach 0.29mm at most, and is close to the dynamic cracking resistance of the flexible water-resistant putty.
The detection result of the comparative example 2 shows that the hydrophobic white carbon black in the water-resistant putty powder has a greater effect on improving the water resistance, crack resistance and bonding performance of the water-resistant putty compared with the common fumed silica. From the results of comparative example 3, it can be seen that in the water-resistant putty powder of the present invention, if the fumed silica is not dispersed in the raw material of the hydrophobic silica, the dispersion performance of the fumed silica is affected, thereby adversely affecting the water resistance, crack resistance and adhesion performance of the water-resistant putty. From the detection results of comparative example 4 and comparative example 5, it can be seen that the types of sodium polyacrylate and cellulose in the water-resistant putty powder have a great influence on the cracking resistance, the bonding strength and the water resistance of the finally obtained water-resistant putty. From the test results of comparative example 6, it can be seen that the water resistance, crack resistance, adhesive strength, etc. of the water resistant putty powder obtained by mixing and stirring the raw materials of the water resistant putty powder of the present invention with water at one time are all reduced.
The water-resistant putty of the embodiment 18, the embodiment 20 and the comparative example 1 are respectively used for surface decoration of an external wall heat-insulating structure, and the concrete construction operations are as follows: adopting the steel scraper blade to scrape and coating on the surface of the outer wall heat-insulating layer of the test block of the building wall body, wherein the scraping and coating for the first time is 2mm, the scraping and coating for the second time is carried out after the putty is dried, the thickness is 3mm, and the putty layer is polished after being dried and solidified. Then respectively soaking the materials in three-level water specified in GB/T6682 for 80h, 100h, 120h and 140h, taking out, and observing whether bubbles exist or not and cracking; after drying for 24h, the fingers were gently rubbed and observed for powder falling. The specific test results are shown in Table 7.
TABLE 7 results of water-resistant durability tests on various water-resistant putties
The results in Table 7 show that the exterior wall water-resistant putty of the invention has excellent water resistance and durability, and still has no bubbles and powder falling after being soaked for 140 hours; in the prior art (comparative example 1), slight cracking occurs after soaking for 100 hours, and bubbles, large-area severe cracking and powder falling occur after soaking for 140 hours; therefore, the exterior wall waterproof putty has excellent waterproof performance and is superior to the prior art. The reason is probably that the waterproof putty has better air permeability and is beneficial to the inlet and outlet of water vapor, thereby relatively prolonging the service life. The results of example 18 and example 20 show that the water-resistant putty powder of the present invention has improved water resistance and crack resistance by adding silica powder, sepiolite powder and palygorskite powder.
The embodiments of the present invention are preferred embodiments, and the scope of the present invention is not limited by the embodiments, and therefore: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The exterior wall waterproof putty is characterized by comprising the following components in parts by weight: (3-4), wherein the waterproof putty powder is prepared from the following raw materials in parts by weight: 400 parts of white cement, 350 parts of ash calcium powder, 150 parts of fly ash, 250 parts of double flying powder, 15-30 parts of aluminum magnesium silicate thixotropic lubricant, 3-10 parts of cellulose, 10-25 parts of hydrophobic white carbon black, 3-8 parts of sodium polyacrylate, 5-15 parts of algin and 15-30 parts of redispersible emulsion powder, wherein the weight ratio of the algin to the redispersible emulsion powder is 1: (2-4).
2. The exterior wall water-resistant putty as claimed in claim 1, which is prepared from the following raw materials in parts by weight: 350 parts of white cement, 300 parts of ash calcium powder, 200 parts of fly ash, 200 parts of magnesium aluminum silicate thixotropic lubricant, 15-30 parts of cellulose, 10-25 parts of hydrophobic white carbon black, 3-8 parts of sodium polyacrylate, 5-15 parts of algin and 15-30 parts of redispersible emulsion powder.
3. The exterior wall water-resistant putty as claimed in claim 1, which is characterized in that: the hydrophobic white carbon black is obtained by modifying gas-phase white carbon black by using dimethyldichlorosilane.
4. The exterior wall water-resistant putty as claimed in claim 3, which is characterized in that: before the fumed silica is modified, the fumed silica is subjected to pre-dispersion treatment according to the following steps: and adding a dispersing agent accounting for 13 percent of the total weight of the slurry under the conditions that the ball-to-material ratio is 4.5:1 and the concentration of the slurry is 2.6 percent, and carrying out superfine grinding on the fumed silica to obtain the milled fumed silica.
5. The exterior wall water-resistant putty as claimed in claim 4, which is characterized in that: the dispersant is sodium polyacrylate.
6. The exterior wall water-resistant putty as claimed in claim 1, which is characterized in that: the cellulose includes lignocellulose and chitosan fibers.
7. The exterior wall water-resistant putty as claimed in claim 1, which is characterized in that: the redispersible latex powder is redispersible vinyl acetate/ethylene copolymer rubber powder.
8. The exterior wall water-resistant putty as defined in any one of claims 1-7, which is characterized in that the water-resistant putty powder further comprises the following raw materials in parts by weight: 3-8 parts of silicon micro powder, 2-5 parts of sepiolite powder and 1-3 parts of palygorskite powder.
9. The preparation method of the exterior wall water-resistant putty as defined in any one of claims 1 to 7 is characterized by comprising the following operation steps:
uniformly mixing the white cement, the sierozem powder, the double-flying powder and the aluminum magnesium silicate thixotropic lubricant to obtain a material A for later use; and adding 150% of water by weight of the sodium polyacrylate into the sodium polyacrylate, uniformly stirring, adding cellulose, hydrophobic white carbon black, algin and redispersible emulsion powder, uniformly stirring, adding the material A and the balance of water, and uniformly stirring to obtain the exterior wall waterproof putty.
10. The preparation method of the exterior wall water-resistant putty as claimed in claim 8, which is characterized by comprising the following operation steps:
uniformly mixing the white cement, the sierozem powder, the double-flying powder and the aluminum magnesium silicate thixotropic lubricant to obtain a material B for later use; uniformly mixing the silicon micro powder, the sepiolite powder and the palygorskite powder to obtain a material C for later use; and adding 150 wt% of water into the sodium polyacrylate, uniformly stirring, adding the material C, the cellulose, the hydrophobic white carbon black, the algin and the redispersible latex powder, uniformly stirring, adding the material A and the balance of water, and uniformly stirring to obtain the exterior wall waterproof putty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010447232.7A CN111423759B (en) | 2020-05-25 | 2020-05-25 | Exterior wall waterproof putty and preparation method thereof |
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| CN112500731A (en) * | 2020-12-22 | 2021-03-16 | 张可新 | Anti-cracking putty powder and preparation method thereof |
| CN114686033A (en) * | 2022-04-27 | 2022-07-01 | 西安德润九州新材料有限公司 | Exterior wall waterproof putty powder and preparation method thereof |
| CN115926520A (en) * | 2022-12-31 | 2023-04-07 | 马腾 | Water-based putty synthesized by plants and mineral powder and preparation method thereof |
| CN116694126A (en) * | 2023-07-21 | 2023-09-05 | 辽宁瑞丰新型建材有限公司 | Preparation method of para-aramid nanofiber aerogel heat-insulation putty |
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| CN102827505A (en) * | 2012-09-21 | 2012-12-19 | 重庆固安捷防腐保温工程有限公司 | UV (ultraviolet) putty with higher water resistance and sanding property |
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| CN112500731A (en) * | 2020-12-22 | 2021-03-16 | 张可新 | Anti-cracking putty powder and preparation method thereof |
| CN114686033A (en) * | 2022-04-27 | 2022-07-01 | 西安德润九州新材料有限公司 | Exterior wall waterproof putty powder and preparation method thereof |
| CN115926520A (en) * | 2022-12-31 | 2023-04-07 | 马腾 | Water-based putty synthesized by plants and mineral powder and preparation method thereof |
| CN115926520B (en) * | 2022-12-31 | 2024-08-02 | 马腾 | Water-based putty synthesized from plants and mineral powder and preparation method thereof |
| CN116694126A (en) * | 2023-07-21 | 2023-09-05 | 辽宁瑞丰新型建材有限公司 | Preparation method of para-aramid nanofiber aerogel heat-insulation putty |
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| CN111423759B (en) | 2021-06-29 |
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