CN112537919A - Improved preparation process of fatty acid liquid waterproof agent - Google Patents
Improved preparation process of fatty acid liquid waterproof agent Download PDFInfo
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- CN112537919A CN112537919A CN202011392930.8A CN202011392930A CN112537919A CN 112537919 A CN112537919 A CN 112537919A CN 202011392930 A CN202011392930 A CN 202011392930A CN 112537919 A CN112537919 A CN 112537919A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Abstract
An improved preparation process of a fatty acid liquid waterproof agent comprises the following steps: preheating a reactor, feeding solid fatty acid, melting and storing the solid fatty acid, injecting normal-temperature water, ammoniating, feeding other additives, and cooling. The preparation process changes the traditional feeding mode of adding water firstly and then adding solid fatty acid, reasonably utilizes the phase change heat release of the fatty acid and the difference of specific heat capacity of different substances, greatly reduces the heat loss and shortens the material melting time by about 120-200 min. The invention not only shortens the production period of the fatty acid concrete waterproofing agent, but also saves energy, greatly reduces the production cost of enterprises and greatly improves the profit. The fatty acid liquid waterproof agent prepared by the method has the advantages of good glossiness, easiness in emulsification and good storage stability.
Description
Technical Field
The invention relates to a preparation process of a concrete additive, in particular to an improved preparation process of a fatty acid liquid waterproof agent.
Background
Waterproofing is an extremely important technical field in building engineering, and waterproof materials are also important functional materials in building engineering. With the continuous development of society and the continuous progress of science and technology, people put forward higher requirements on the quality of waterproof engineering. At present, the building waterproof engineering has five main methods: asphalt waterproofing, additive waterproofing, elastic coiled material waterproofing, paint waterproofing and soaking waterproofing. In the waterproof construction methods, the additive has the advantages of low cost, simple and convenient construction, good durability and the like. In recent years, in waterproofing works at home and abroad, waterproofing with an additive has become one of indispensable methods.
The iron chloride waterproof agent is earlier applied to the waterproofing of the concrete admixture, and the waterproof agent has good waterproof effect but is easy to generate the corrosion of reinforcing steel bars and metal embedded parts; the expanding agent type waterproof agent is a composite waterproof agent, has an obvious effect under a humid condition, but often causes later-stage cracking when the early-stage curing condition is not good, so that the waterproof effect is influenced; among liquid water-proofing agents, an organic silicon water-proofing agent is easy to crack when the curing environment is poor, and in addition, a net-shaped hydrophobic film is formed on the surface of the hardened concrete, so that a plastering layer is easy to peel off; the fatty acid liquid waterproof agent is doped into mortar or concrete, and a hydrophobic layer is formed or a hydrophobic substance is stored in capillary pores of the cement concrete, so that the water is prevented from being immersed, and a good waterproof effect is achieved.
Regarding the preparation of fatty acid liquid water repellent, the related patent documents: CN104072008A discloses a preparation method of a mortar and concrete waterproofing agent, which comprises the following steps: a. selecting a stainless steel reaction kettle, adding all water in the raw materials according to the formula amount, and then heating to raise the temperature to 20-25 ℃. b. Adding all stearic acid in the raw materials into the reaction kettle according to the formula amount under the condition of continuous stirring, and continuously stirring until the stearic acid is completely dissolved. c. And c, adding triethanolamine with the formula amount into the mixture dissolved in the step b, stirring and reacting for 30min, and completely emulsifying the solution to obtain milky emulsion for later use. d. And (3) selecting a stainless steel tank again, putting all the sodium polyacrylate and the sodium dodecyl benzene sulfonate in the raw materials into the stainless steel tank according to the formula amount, and then uniformly mixing. e. And (c) adding ethanol in the raw materials into the stainless steel tank in the step (b) according to the formula amount, and reacting with the solution in the stainless steel tank. f. And e, adding the reaction solution after the reaction in the step e into the reaction kettle in the step c, continuously stirring for 30min, adding silica sol in the raw materials according to the formula amount, stirring and reacting for 20-40 min to obtain a product, namely the finished product of the mortar and the concrete waterproofing agent to be prepared, packaging and warehousing. CN102344263A discloses a novel production process of a mortar concrete waterproofing agent, which comprises the following specific operation steps of 1) removing impurities in raw materials by filtration; 2) adding octadecanoic acid and silane into water respectively according to the weight ratio of 15-20% for dilution, putting the diluted solution into a reactor, heating to 70-80 ℃, and heating for 20-30 minutes; 3) adding sodium abietate into a reactor according to 3% of the weight of octadecanoic acid and silane, heating and stirring at the temperature of 70-80 ℃ for 30 minutes at the stirring speed of not less than 300 revolutions per minute; 4) adding sodium hydroxide into a reactor according to 10% of the weight of octadecanoic acid and silane, heating and stirring for 30 minutes at the temperature of 70-80 ℃, wherein the stirring speed is not lower than 300 revolutions per minute; 5) adding triethanolamine into a reactor according to the weight of 0.7 percent of the weight of octadecanoic acid and silane, cooling to 50-60 ℃, stirring for 30 minutes, heating to 80-90 ℃, stirring for 40 minutes, and naturally cooling to obtain the waterproof agent. CN1470591A discloses a production method of a waterproof agent, which is characterized by comprising the following steps: (1) filtering fatty acid with cloth to remove impurities; (2) diluting the filtered fatty acid by adding water according to 40-50% of the weight of the fatty acid, putting the diluted fatty acid into a reactor, and heating for 30-60 minutes at 50-70 ℃; (3) adding sodium abietate accounting for 3-4% of the weight of the fatty acid into a reactor, heating at 60-80 ℃, and stirring for 60-90 minutes, wherein the stirring speed is 200 revolutions per minute; (4) adding sodium oxysulfide accounting for 15-20% of the weight of the fatty acid into a reactor, heating at 80-90 ℃, and stirring for 90-120 minutes; forming an emulsion, wherein the stirring speed is 20 revolutions per minute; (5) adding triethanolamine accounting for 0.3-0.6% of the weight of the fatty acid into the emulsion in the reactor, stirring for 20 minutes at the stirring speed of 100 revolutions per minute, heating for 140 minutes at 90-100 ℃, sampling, checking the pH value, and cooling to form a paste when the pH value is 6-8, thus obtaining the waterproof agent. CN104628420A discloses a preparation method of a waterproof agent, which is characterized by comprising the following steps: (1) heating normal-temperature water (with the weight of m) to 70-75 ℃ in a container, and heating to keep the water temperature unchanged; (2) sequentially adding strong base (1.5-2.5% m in weight), sodium carbonate (0.5-1% m in weight) and sodium fluoride (0.01-0.015% m in weight) into water, and stirring for 20-30 minutes; (3) weighing stearic acid with the weight of 10-12% m, adding the stearic acid into the solution, stirring while adding, keeping the water temperature unchanged, stirring at the rotating speed of 300 revolutions per minute for 1-2 hours until the stearic acid is completely melted in the water, and stopping heating the solution at the moment; (4) weighing normal-temperature water with the weight m, adding the normal-temperature water into the solution, uniformly stirring, and stirring at the rotation speed of 200 revolutions per minute until the temperature of the solution is reduced to 25-30 ℃; (5) and (2) weighing ammonia water (5-7% m in weight), adding the ammonia water into the solution, stirring for 20-30 minutes at a stirring speed of 200 revolutions per minute, and cooling to form milky liquid to obtain the waterproof agent. Further, CN105368187A discloses a high-priced waterproofing agent, and CN106495545A discloses a waterproofing agent for buildings, but they do not describe in detail the specific operation steps of the waterproofing agent.
The preparation technology of the fatty acid waterproof agent comprises the steps of adding water into a reactor and then adding the fatty acid, or adding the fatty acid and the water into the reactor together, wherein the preparation period of the fatty acid waterproof agent provided by the above technology is long. Because the melting point of the fatty acid is higher, a longer production period inevitably consumes more heat, and the production cost of the waterproof agent is higher.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an improved preparation process of a fatty acid liquid waterproof agent, which can shorten the production period of a fatty acid concrete waterproof agent, save energy, greatly reduce the production cost of enterprises, and ensure that the prepared fatty acid liquid waterproof agent has good glossiness, easy emulsification and good storage stability.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
an improved preparation process of a fatty acid liquid waterproof agent, which adopts the technical scheme that the preparation process comprises the following process steps: (1) preheating a reactor (reaction kettle) in a material preparation stage, adding 40-75 parts of solid fatty acid into the reactor after the material is prepared, so that the material melting time can be shortened by 40-60 min, and starting stirring; (2) when the temperature of the solid fatty acid in the material is 10-40 ℃ higher than the melting point of the solid fatty acid (at this time, the solid fatty acid is fully melted), keeping the temperature for 5-30 min to ensure that the solid fatty acid is completely melted and store a large amount of generated heat; (3) under the conditions of keeping the temperature unchanged and continuously stirring, slowly injecting 850-940 parts of normal-temperature water (20 ℃) into the reactor at a certain flow rate, wherein the specific heat fusion of the solid fatty acid is 7-11 times that of water, so that a large amount of heat can be stored in the molten solid fatty acid, the heat can be quickly transferred to the water by adding the water, the heat loss is reduced, and the material melting time can be further shortened by 80-140 min; (4) continuously heating and raising the temperature, and stirring for 15-40 min at constant temperature when the temperature of materials in the reactor is 10-20 ℃ higher than the melting point of the solid fatty acid; (5) adding 20-30 parts of ammonia water into the reactor, and stirring at constant temperature for 10-20 min; and then cooling, adding 8-16 parts of other auxiliary agents in the cooling process, and cooling the reactor to 40-50 ℃ to obtain a mixed material.
In the above technical solution, a preferable technical solution may be: the number of carbon atoms of the solid fatty acid is 10-20. The solid fatty acid may be one of stearic acid, palmitic acid and lauric acid. In the step (1), the material preparation stage preferably pre-heats the reactor to 80-90 ℃. In the step (3), the normal temperature water is preferably tap water or deionized water. In the step (3), when the normal temperature water is injected, the flow rate of the water is preferably controlled so that the temperature difference between the materials in the reactor before and after the water is added is less than or equal to 10 ℃. In the step (5), the other auxiliary agent includes, but is not limited to, one of diglycolamine, diethanolamine, 2-amino-2-methyl-1-propanol, tetrahydroxyethyl ethylenediamine, N-methyldiethanolamine, and diisopropanolamine. In the step (5), if the prepared mixed material is completely dissolved in water, the mixed material is directly a final product; if the prepared mixed material cannot be completely dissolved in water, the mixed material needs to be poured into a high-shear homogenizing and emulsifying machine, the rotating speed of the high-shear homogenizing and emulsifying machine is set to be 10000-30000 r/min, and emulsification is carried out for 10-40 min at the temperature of 40-50 ℃ to obtain a final product.
In the above technical solution, a preferable technical solution may be that: the improved preparation process of the fatty acid liquid waterproof agent is characterized by comprising the following process steps: (1) preheating a reactor to 90 ℃, adding 60 parts of stearic acid into the reactor, and starting stirring; (2) when the temperature of the stearic acid material is increased to 95 ℃ (27 ℃ higher than the melting point of stearic acid, 67-69 ℃ higher than the melting point of stearic acid, and 68 ℃), keeping the temperature for 10min to ensure that stearic acid is completely melted, and storing the generated heat; (3) slowly injecting 908 parts of normal-temperature tap water into the reactor at the flow rate of 1000kg/h under the conditions of keeping the temperature unchanged and continuously stirring; (4) continuing heating and raising the temperature, and stirring for 20min at constant temperature when the temperature of the materials in the reactor reaches 85 ℃ (the temperature is 17 ℃ higher than the melting point of stearic acid); (5) adding 22 parts of ammonia water into the reactor, and stirring for 15min at constant temperature; then cooling, adding 10 parts of other auxiliary agent namely diglycolamine in the cooling process, and cooling the reactor to 50 ℃ to obtain a mixed material; pouring the mixed material into a high-shear homogenizing emulsifying machine, setting the rotating speed of the high-shear homogenizing emulsifying machine at 20000r/min, and emulsifying at 50 ℃ for 30min to obtain the final product, namely the fatty acid liquid waterproof agent.
Among the above-described technical solutions, preferred technical solutions may also be the following embodiments 2 to 3.
The invention provides an improved preparation process of a fatty acid liquid waterproof agent, which comprises the following steps: preheating reactor, feeding solid fatty acid, melting and storing solid fatty acid, injecting normal-temperature tap water or deionized water, ammoniating, feeding other auxiliary agents, cooling and cooling. Compared with the prior art, the invention has the beneficial effects that: the preparation process changes the traditional feeding mode of adding water first and then adding solid fatty acid, reasonably utilizes the phase change heat release of the fatty acid and the difference of specific heat capacity of different substances, greatly reduces the heat loss and shortens the material melting time by about 120-200 min. Secondly, the production period of the fatty acid concrete waterproofing agent is shortened, energy is saved, the production cost of enterprises is greatly reduced, and the profit is greatly improved. And thirdly, because the fatty acid is melted completely, the fatty acid liquid waterproof agent prepared by the method provided by the invention has good glossiness, is easy to emulsify and has good storage stability.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: the improved preparation process of the fatty acid liquid waterproof agent comprises the following process steps: (1) preheating a reactor to 90 ℃, adding 60 parts of stearic acid into the reactor, and starting stirring; (2) when the temperature of the stearic acid material is increased to 95 ℃ (27 ℃ higher than the melting point of stearic acid, 67-69 ℃ higher than the melting point of stearic acid, and 68 ℃), keeping the temperature for 10min to ensure that stearic acid is completely melted, and storing the generated heat; (3) slowly injecting 908 parts of normal-temperature tap water into the reactor at the flow rate of 1000kg/h under the conditions of keeping the temperature unchanged and continuously stirring; (4) continuing heating and raising the temperature, and stirring for 20min at constant temperature when the temperature of the materials in the reactor reaches 85 ℃ (the temperature is 17 ℃ higher than the melting point of stearic acid); (5) adding 22 parts of ammonia water into the reactor, and stirring for 15min at constant temperature; then cooling, adding 10 parts of other auxiliary agent namely diglycolamine in the cooling process, and cooling the reactor to 50 ℃ to obtain a mixed material; pouring the mixed material into a high-shear homogenizing emulsifying machine, setting the rotating speed of the high-shear homogenizing emulsifying machine at 20000r/min, and emulsifying at 50 ℃ for 30min to obtain the final product, namely the fatty acid liquid waterproof agent.
The concrete is produced according to the preparation process, and the compressive strength ratio, the water absorption, the chloride ion diffusion coefficient and the electric flux of the concrete doped with the waterproof agent are measured, the production period of the waterproof agent is shortened, and the profit per ton of the product is improved, and the results are shown in table 1.
Example 1 detection results of Water repellent
Example 2: the improved preparation process of the fatty acid liquid waterproof agent comprises the following process steps: (1) preheating a reactor to 85 ℃, adding 65 parts of palmitic acid into the reactor, and starting stirring; (2) when the temperature of the material palmitic acid is raised to 90 ℃ (27 ℃ higher than the melting point of the palmitic acid and 63 ℃) and the temperature is kept for 10min, the palmitic acid is ensured to be completely melted, and the generated heat is stored; (3) 899 parts of normal-temperature tap water is slowly injected into the reactor at the flow rate of 1000kg/h under the conditions of constant temperature and continuous stirring; (4) continuing heating and raising the temperature, and stirring for 20min at constant temperature when the temperature of the materials in the reactor reaches 78 ℃ (higher than the melting point of palmitic acid by 15 ℃); (5) adding 24 parts of ammonia water into the reactor, and stirring for 15min at constant temperature; then cooling, adding 12 parts of other auxiliary agent, namely 2-amino-2-methyl-1-propanol, in the cooling process, and cooling the reactor to 50 ℃ to obtain a mixed material; pouring the mixed material into a high-shear homogenizing emulsifying machine, setting the rotating speed of the high-shear homogenizing emulsifying machine at 20000r/min, and emulsifying at 45 ℃ for 30min to obtain the final product, namely the fatty acid liquid waterproof agent.
The concrete is produced according to the preparation process, and the compressive strength ratio, the water absorption, the chloride ion diffusion coefficient and the electric flux of the concrete doped with the waterproof agent are measured, the production period of the waterproof agent is shortened, and the profit per ton of the product is improved, and the results are shown in Table 2.
Example 2 detection results of Water repellent
Example 3: the improved preparation process of the fatty acid liquid waterproof agent comprises the following process steps: (1) preheating a reactor to 80 ℃, adding 70 parts of lauric acid into the reactor, and starting stirring; (2) when the temperature of the material lauric acid rises to 75 ℃ (higher than 31 ℃ of the melting point of the lauric acid and 44 ℃), keeping the temperature for 10min to ensure that the lauric acid is completely melted and storing the generated heat; (3) slowly injecting 888 parts of normal-temperature tap water into the reactor at the flow rate of 1000kg/h under the conditions of keeping the temperature unchanged and continuously stirring; (4) heating continuously, and stirring at constant temperature for 20min when the temperature of the materials in the reactor reaches 60 ℃ (higher than 16 ℃ of the melting point of lauric acid brown); (5) adding 28 parts of ammonia water into the reactor, and stirring for 15min at constant temperature; and then cooling, adding 14 parts of other auxiliary agent namely N-methyldiethanolamine in the cooling process, and cooling the reactor to 40 ℃ to obtain a mixed material, thus obtaining the final product of the fatty acid liquid waterproof agent.
The concrete is produced according to the preparation process, and the compressive strength ratio, the water absorption, the chloride ion diffusion coefficient and the electric flux of the concrete doped with the waterproof agent are measured, the production period of the waterproof agent is shortened, and the profit per ton of the product is improved, and the results are shown in Table 3.
Example 3 detection results of Water repellent
From the above examples, it can be seen that the indexes of concrete of the water-proofing agent prepared by the improved preparation process of the fatty acid liquid water-proofing agent are far higher than the standard index requirements, the production period of the water-proofing agent can be shortened by more than 2 hours, and the profit per ton of product can be greatly improved.
The melting point of the fatty acid with 10-20 carbon atoms is proper, the melting enthalpy is high, the raw materials are easy to obtain, no toxic or side effect is caused to human bodies, and the price is low, so that the phase-change energy storage material is a phase-change energy storage material with a good application prospect.
In the step (3) of each example, when the water at normal temperature is injected, the flow rate of the water is controlled so that the difference between the temperatures of the materials in the reactor before and after the water is added is not more than 10 ℃ (may be 5 ℃ to 8 ℃).
In summary, the above embodiments of the present invention provide an improved preparation process of a fatty acid liquid waterproof agent, which not only can shorten the production cycle of a fatty acid concrete waterproof agent, but also can save energy, and greatly reduce the production cost of enterprises, and the prepared fatty acid liquid waterproof agent has good glossiness, easy emulsification, and good storage stability.
Claims (10)
1. An improved preparation process of a fatty acid liquid waterproof agent is characterized by comprising the following process steps: (1) in the material preparation stage, a reactor is preheated, 40-75 parts of solid fatty acid is added into the reactor after the material is prepared, and stirring is started; (2) when the temperature of the solid fatty acid in the material is 10-40 ℃ higher than the melting point of the solid fatty acid, keeping the temperature for 5-30 min to ensure that the solid fatty acid is completely melted and store the generated heat; (3) slowly injecting 850-940 parts of normal-temperature water into the reactor at a certain flow rate under the conditions of keeping the temperature unchanged and continuously stirring; (4) continuously heating and raising the temperature, and stirring for 15-40 min at constant temperature when the temperature of materials in the reactor is 10-20 ℃ higher than the melting point of the solid fatty acid; (5) adding 20-30 parts of ammonia water into the reactor, and stirring at constant temperature for 10-20 min; and then cooling, adding 8-16 parts of other auxiliary agents in the cooling process, and cooling the reactor to 40-50 ℃ to obtain a mixed material.
2. The improved process for preparing a liquid fatty acid waterproofing agent according to claim 1, wherein the number of carbon atoms of the solid fatty acid is 10 to 20.
3. The improved process for preparing a liquid fatty acid waterproofing agent according to claim 1, wherein the solid fatty acid is one of stearic acid, palmitic acid and lauric acid.
4. The improved process for preparing a fatty acid based liquid waterproofing agent according to claim 1, wherein in the step (1), the reactor is preheated to 80 to 90 ℃ in the material preparation stage.
5. The improved process for preparing a fatty acid based liquid water repellent according to claim 1, wherein in the step (3), the water at normal temperature is tap water or deionized water.
6. The improved process for preparing a fatty acid based liquid water repellent according to claim 1, wherein in the step (3), when water at normal temperature is supplied, the flow rate of water is controlled so that the temperature difference between the contents of the reactor before and after the supply of water is 10 ℃ or less.
7. The improved process for preparing a fatty acid liquid water repellent according to claim 1, wherein in the step (5), the other auxiliary agent is one of diglycolamine, diethanolamine, 2-amino-2-methyl-1-propanol, tetrahydroxyethylethylenediamine, N-methyldiethanolamine, and diisopropanolamine.
8. The improved process for preparing a fatty acid based liquid water repellent according to claim 1, wherein in the step (5), if the mixture is completely dissolved in water, it is directly a final product; if the prepared mixed material cannot be completely dissolved in water, the mixed material needs to be poured into a high-shear homogenizing and emulsifying machine, the rotating speed of the high-shear homogenizing and emulsifying machine is set to be 10000-30000 r/min, and emulsification is carried out for 10-40 min at the temperature of 40-50 ℃ to obtain a final product.
9. The improved preparation process of fatty acid liquid waterproofing agent according to claim 1, characterized in that it comprises the following process steps: (1) preheating a reactor to 90 ℃, adding 60 parts of stearic acid into the reactor, and starting stirring; (2) when the temperature of the stearic acid material is raised to 95 ℃, keeping the temperature for 10min to ensure that the stearic acid is completely melted and storing the generated heat; (3) slowly injecting 908 parts of normal-temperature tap water into the reactor at the flow rate of 1000kg/h under the conditions of keeping the temperature unchanged and continuously stirring; (4) continuing heating and raising the temperature, and stirring for 20min at constant temperature when the temperature of the materials in the reactor reaches 85 ℃; (5) adding 22 parts of ammonia water into the reactor, and stirring for 15min at constant temperature; then cooling, adding 10 parts of other auxiliary agent namely diglycolamine in the cooling process, and cooling the reactor to 50 ℃ to obtain a mixed material; pouring the mixed material into a high-shear homogenizing emulsifying machine, setting the rotating speed of the high-shear homogenizing emulsifying machine at 20000r/min, and emulsifying at 50 ℃ for 30min to obtain the final product, namely the fatty acid liquid waterproof agent.
10. The improved preparation process of fatty acid liquid waterproofing agent according to claim 1, characterized in that it comprises the following process steps: (1) preheating a reactor to 85 ℃, adding 65 parts of palmitic acid into the reactor, and starting stirring; (2) when the temperature of the material palmitic acid rises to 90 ℃, keeping the temperature for 10min to ensure that the palmitic acid is completely melted and store the generated heat; (3) 899 parts of normal-temperature tap water is slowly injected into the reactor at the flow rate of 1000kg/h under the conditions of constant temperature and continuous stirring; (4) continuing heating and raising the temperature, and stirring for 20min at constant temperature when the temperature of the materials in the reactor reaches 78 ℃; (5) adding 24 parts of ammonia water into the reactor, and stirring for 15min at constant temperature; then cooling, adding 12 parts of other auxiliary agent, namely 2-amino-2-methyl-1-propanol, in the cooling process, and cooling the reactor to 50 ℃ to obtain a mixed material; pouring the mixed material into a high-shear homogenizing emulsifying machine, setting the rotating speed of the high-shear homogenizing emulsifying machine at 20000r/min, and emulsifying at 45 ℃ for 30min to obtain the final product, namely the fatty acid liquid waterproof agent.
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| CN114656190A (en) * | 2022-03-18 | 2022-06-24 | 中交四航工程研究院有限公司 | Fatty acid concrete hydrophobic pore suppository and preparation method thereof |
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Application publication date: 20210323 |