Waterborne polyurethane mortar floor emulsion and application thereof

Abstract

The present application relates to a kind of water-based polyurethane mortar floor emulsion and its application, floor emulsion includes the following components: dimer acid-based polyester polyol, bio-based polyester polyol, defoaming agent, dispersant, emulsifier, dihydric alcohol, plasticizer and water.The preparation method of dimer acid-based polyester polyol includes the following steps: the molar ratio of first polyol and monobasic fatty acid is 1:(1~4) is mixed, catalyst is added, vacuum is extracted, reaction is carried out at 180~240 DEG C temperature for 3~16h, then dimer acid and / or hydrogenated dimer acid are added, continue to react for 3~16h, obtain dimer acid-based polyester polyol.The present application relies on the innovative application of dimer acid-based polyol, breaks through the contradiction limitation of traditional "hydrophilic stable emulsion-hydrophobicity reduces friction", significantly improves emulsion storage stability (≥20 days) and floor wet-state friction coefficient (μ≥0.55).

Description

Technical Field

[0001] This invention relates to the field of floor coating technology, specifically to a water-based polyurethane mortar floor emulsion and its application. Background Technology

[0002] Waterborne polyurethane mortar flooring, with its environmentally friendly characteristics and excellent mechanical properties, has become an important solution in the industrial flooring field. However, the large-scale application of this technology is still limited by two key bottlenecks: insufficient emulsion storage stability and poor anti-slip properties of the floor surface. Conventional waterborne polyurethane emulsions are prone to stratification and flocculation during long-term storage or temperature fluctuations, resulting in a short construction window and increased material loss. The root cause lies in the imperfect interfacial stabilization mechanism of latex particles, especially the lack of targeted design for the molecular structure of polyols. At the same time, the wet friction coefficient (μ) of existing polyurethane mortar flooring in humid or oily environments is generally lower than 0.45 (GB 10006 standard), which is difficult to meet the strict anti-slip requirements (μ≥0.5) of high-safety scenarios (such as food factory ramps and underground parking garages).

[0003] Current industry attempts to address this by adding external emulsifiers or inorganic anti-slip particles, but these methods all introduce new drawbacks—excessive emulsifiers reduce the coating's water resistance, while physically mixed anti-slip particles are prone to detachment and accelerate equipment wear. More seriously, there is a fundamental conflict between emulsion stability and surface anti-slip properties: improving stability requires enhancing hydrophilicity, but this increases the surface energy after film formation, exacerbating the water film lubrication effect and thus weakening friction; conversely, while introducing hydrophobic segments can optimize anti-slip properties, it compromises the emulsion's colloidal stability.

[0004] Furthermore, existing technologies have failed to effectively resolve the contradiction between these two key bottlenecks. For example, the scheme disclosed in CN113980477A, ​​while attempting to optimize performance locally through compound additives, failed to synergistically address this contradiction at the polyol molecular design level, particularly neglecting the dual regulatory potential of alkyl side chains of specific lengths (C8-C18) in latex particle interface anchoring and film surface microphase separation. Therefore, developing a core technology that simultaneously achieves high emulsion stability and high anti-slip properties of flooring through polyol structural innovation has become an urgent need for the industry. Summary of the Invention

[0005] Based on this, the purpose of this invention is to provide a technical solution that achieves synergistic optimization of the stability of waterborne polyurethane emulsion and the anti-slip properties of mortar flooring through innovation in the molecular structure of polyols, fundamentally overcoming the core defect in the prior art that the storage stability of emulsion and the wet anti-slip properties of the final floor surface cannot be improved simultaneously.

[0006] First aspect:

[0007] A water-based polyurethane mortar flooring emulsion, comprising the following components:

[0008] Dimer acid-based polyester polyol, bio-based polyester polyol, defoamer, dispersant, emulsifier, diol, plasticizer and water; and the mass ratio of these 8 raw materials is: (7-50):(8-20):(1.5-3):(0-0.6):(0.2-0.8):(3-10):(20-35):(25-35);

[0009] The dimer acid-based polyester polyol has a chemical structural formula of at least one of Formula 1-1, Formula 1-2 and Formula 1-3;

[0010] Formula 1-1

[0011]

[0012] Formula 1-2

[0013]

[0014] Formula 1-3

[0015]

[0016] Where R1 is a saturated or unsaturated hydrocarbon group of C7-C17, and n is an integer from 1 to 3.

[0017] The core technology of this invention lies in overcoming the inherent contradiction of traditional "hydrophilic stabilizing emulsions - hydrophobic reducing friction." Through a precisely designed hydrophobic alkyl chain structure, it simultaneously achieves a significant improvement in both emulsion storage stability (≥20 days) and the wet friction coefficient of the floor (μ≥0.55). Its core mechanism relies on the innovative application of dimer acid-based polyols:

[0018] Reaction control and compatibility optimization: The unique long-chain branched structure of dimer acid can effectively mask some active hydroxyl groups (-OH), reducing their reaction rate with isocyanate (-NCO). Simultaneously, its strong hydrophobic properties significantly improve compatibility with isocyanate curing agents, ensuring sufficient coating of isocyanate, preferentially promoting the main reaction between polyol hydroxyl groups and isocyanate groups, and effectively inhibiting side reactions between other raw materials (such as water and fillers) and isocyanate.

[0019] Blending and Improved Processing Performance: By blending dimer acid-based polyols with bio-based polyols, a polyol mixture with moderate viscosity and excellent processing performance is obtained. The long carbon chains contained in the dimer acid-based polyols endow the system with high flexibility, which not only makes the slurry easier to level but also significantly extends the construction operation time.

[0020] A breakthrough in the dual properties of hydrophobic chains: The long-chain hydrophobic alkyl structure introduced by dimer acids is key to achieving synergistic optimization of emulsion stability and anti-slip properties of floor surfaces. This structure stabilizes the emulsion system by enhancing the hydrophobic anchoring effect at the latex particle interface (improving storage stability); on the other hand, it induces the formation of a moderately hydrophobic microphase separation structure on the surface after film formation (rather than a completely hydrophilic smooth surface). This structure effectively repelles water or oil in humid environments, significantly increasing friction (improving the wet μ value), thus overturning the traditional perception that emulsion stability and friction coefficient are necessarily contradictory.

[0021] As a preferred embodiment, the preparation method of the dimer acid-based polyester polyol includes the following steps: mixing a first polyol and a monobasic fatty acid in a molar ratio of 1:(1~4), adding a catalyst, evacuating the vacuum, reacting at a temperature of 180~240℃ for 3~16h, then adding dimer acid and / or hydrogenated dimer acid, and continuing the reaction for 3~16h to obtain the dimer acid-based polyester polyol;

[0022] The total molar amount of the dimer acid and the hydrogenated dimer acid is in the molar ratio of the first polyol to (0.45~0.55):1;

[0023] The first polyol includes at least one of trimethylolpropane, trimethylolethane, pentaerythritol, dipentaerythritol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, and tripropylene glycol;

[0024] The monobasic fatty acid includes at least one of the following: octanoic acid, isooctanoic acid, lauric acid, palmitoleic acid, linoleic acid, stearic acid, and oleic acid;

[0025] The catalyst includes at least one of tetrabutyl titanate, tetraisopropyl titanate, tetraoctyl titanate, tetrabutyl zirconate, tetraisopropyl zirconate, dibutyltin dilaurate, and zinc antimony oxide.

[0026] As a preferred embodiment, after adding the catalyst and evacuating the vacuum, the dimer acid and / or hydrogenated dimer acid can be added when the acid value of the reaction system is below 3 mg KOH / g. After adding the dimer acid and / or hydrogenated dimer acid, the reaction is considered complete and terminated when the acid value of the reaction system is below 3 mg KOH / g and the hydroxyl value of the reaction system reaches 100-240 mg KOH / g. When the acid value is above 3 mg KOH / g, the polyol contains too much unreacted organic acid, ultimately affecting the strength of the flooring. When the hydroxyl value in the reaction system reaches 100-240 mg KOH / g, the appropriate ratio of the number of hydroxyl groups in the polyol in the emulsion to the amount of isocyanate in the curing agent can be ensured.

[0027] As a preferred embodiment, the effective content of the waterborne polyurethane mortar flooring emulsion is 65-75 wt.%, and the hydroxyl content is 2-4 wt.%. When the effective content is too low, the emulsion has poor film-forming properties and slow drying, resulting in substandard performance. When the hydroxyl content is too low, cross-linking is insufficient, and the paint film is too soft and not wear-resistant. When the hydroxyl content is too high, cross-linking is excessive, and the paint film becomes brittle. This content is fundamental to achieving the optimal NCO / OH ratio with the matching curing agent.

[0028] As a preferred embodiment, the bio-based polyester polyol is at least one of BASF Sovermol 750, Sovermol 1006 and Sovermol 908 or is primary refined castor oil.

[0029] As a preferred embodiment, the defoamer is a silicone-modified defoamer, and the silicone-modified defoamer is at least one of CDI4900 and TEGO-900 from Shenzhen Haiwei Additives New Materials Technology Co., Ltd.

[0030] As a preferred embodiment, the dispersant is at least one of CDI104 and CDI101 from Shenzhen Haiwei Additives New Materials Technology Co., Ltd.

[0031] The emulsifier is at least one of BASF Lutensol TO5, Lutensol TO7, Lutensol TO9 and REWOQUAT® CQ 100S;

[0032] The diol is at least one selected from triethylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol-600, polypropylene glycol-1000, and polypropylene glycol-2000;

[0033] The plasticizer is TXIB from Erickson Chemicals.

[0034] Among them, TXIB, as an environmentally friendly plasticizer, has the core advantage of combining excellent environmental safety with superior physical properties compared to traditional phthalate plasticizers. It is not only non-toxic, low in VOCs, and biodegradable, complying with stringent environmental regulations, but also significantly reduces system viscosity, improves processing leveling, and imparts a unique effect of dry, stain-resistant, and better-feeling surfaces to finished products. It is a highly efficient and multifunctional plasticizer upgrade option, and it does not migrate or leach out.

[0035] The second aspect:

[0036] The application of a waterborne polyurethane mortar flooring emulsion as described in the first aspect includes the following steps:

[0037] Mixed water-based polyurethane mortar floor emulsion:

[0038] By weight, 7-50 parts of dimer acid-based polyester polyol, 8-20 parts of bio-based polyester polyol, 1.5-3 parts of defoamer, 0-0.6 parts of dispersant, 0.2-0.8 parts of emulsifier, 3-10 parts of diol, and 20-35 parts of plasticizer are placed in the first container. The temperature is <50℃, and the mixture is dispersed at a stirring speed of 1000-1200 rpm for 10-15 min. Then, 25-35 parts of water are added, and the mixture is dispersed at a stirring speed of 400-600 rpm for 5-10 min to obtain component A.

[0039] Preparation of isocyanate curing agent:

[0040] Place at least one of WANNATE PM-200, WANNATE IPDI, and WANNATE MDI-50 into a second container and disperse at a stirring speed of 400-600 rpm for 5-10 min to obtain component B;

[0041] Preparation of mortar filler:

[0042] By weight, 60-80 parts of 40-70 mesh or 70-140 mesh river sand, 16-25 parts of white cement, and 8-14 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at a stirring speed of 400-600 rpm for 10-15 minutes to obtain component C.

[0043] Preparation of aqueous dispersible pigments:

[0044] Place at least one of the following, Kedi waterborne polyurethane color paste and Yunze oil-in-water color paste, into a third container and disperse at a stirring speed of 400-600 rpm for 5-10 min to obtain component D.

[0045] Mix components A, B, C, and D:

[0046] The components A, B, and D are mixed and stirred evenly to obtain a mixed slurry.

[0047] Then, component C is added to the mixed slurry, stirred and mixed evenly, and after curing, polyurethane mortar flooring can be prepared.

[0048] The mass ratio of components A, B, C, and D is 1:(0.9-1.3):(1.5-6.2):(0-0.1).

[0049] As a preferred embodiment, when components A, B, and D are mixed, the stirring time is 20-30 s when the temperature is 20-35℃, and 30-50 s when the temperature is 10-20℃.

[0050] As a preferred embodiment, when component C is added to the mixed slurry, the stirring time is 1-1.5 min if the temperature is >30℃; 1.5-2 min if the temperature is 15-30℃; 2-3 min if the temperature is 10-15℃; and 3-5 min if the temperature is <10℃. Attached Figure Description

[0051] Figure 1 This is the infrared spectrum of polyester polyol. Detailed Implementation

[0052] The present invention will now be described more fully. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Experimental methods in the following examples or comparative examples, where specific conditions are not specified, are generally performed under conventional conditions in the art or as recommended by the manufacturer; the raw materials, reagents, etc., used, unless otherwise specified, are all commercially available from the conventional market.

[0053] A water-based polyurethane mortar flooring emulsion, having an effective content of 65-75 wt.% and a hydroxyl content of 2-4 wt.%, specifically comprises the following components:

[0054] Dimer acid-based polyester polyol, bio-based polyester polyol, silicone-modified defoamer, dispersant, emulsifier, diol, plasticizer, water.

[0055] The mass ratio of the eight raw materials—dimer acid-based polyester polyol, bio-based polyester polyol, silicone-modified defoamer, dispersant, emulsifier, diol, plasticizer, and water—is (7-50):(8-20):(1.5-3):(0-0.6):(0.2-0.8):(3-10):(20-35):(25-35).

[0056] Dimer acid-based polyester polyols have chemical structural formulas of at least one of Formula 1-1, Formula 1-2 and Formula 1-3, wherein R1 is a C7-C17 hydrocarbon group, n is an integer from 1 to 3, and the hydroxyl value is 100~240 mgKOH / g.

[0057] Formula 1-1

[0058]

[0059] Formula 1-2

[0060]

[0061] Formula 1-3

[0062]

[0063] The bio-based polyester polyol is at least one of BASF Sovermol 750, Sovermol 1006 and Sovermol 908 or is primary refined castor oil;

[0064] The organosilicon-modified defoamer is at least one of CDI4900 and TEGO-900 from Shenzhen Haiwei Additives New Materials Technology Co., Ltd.

[0065] The dispersant is at least one of CDI104 and CDI101 from Shenzhen Haiwei Additives New Materials Technology Co., Ltd.

[0066] The emulsifier is at least one of BASF Lutensol TO5, Lutensol TO7, Lutensol TO9 and REWOQUAT® CQ100S;

[0067] The diol is at least one of triethylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol-600, polypropylene glycol-1000, and polypropylene glycol-2000;

[0068] The plasticizer is TXIB from Erickson Chemicals.

[0069] The preparation method of dimer acid-based polyester polyol includes the following steps: mixing a first polyol and a monobasic fatty acid in a molar ratio of 1:(1~4), adding a catalyst, applying vacuum, and reacting at a temperature of 180~240℃ for 3~16h. When the acid value of the reaction system is lower than 3mgKOH / g, dimer acid and / or hydrogenated dimer acid are added, with the total molar amount of dimer acid and hydrogenated dimer acid in a molar ratio of (0.45~0.55):1 to the first polyol. The reaction is continued for 3~16h. When the acid value of the reaction system is lower than 3mgKOH / g and the hydroxyl value of the reaction system reaches 100~240mgKOH / g, the reaction is terminated to obtain dimer acid-based polyester polyol. In the embodiments of the present invention, the purity of dimer acid and hydrogenated dimer acid is ≥98%.

[0070] The first polyol includes at least one of trimethylolpropane, trimethylolethane, pentaerythritol, dipentaerythritol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, and tripropylene glycol.

[0071] Monobasic fatty acids include at least one of the following: caprylic acid, isooctanoic acid, lauric acid, palmitoleic acid, linoleic acid, stearic acid, and oleic acid.

[0072] The catalyst includes at least one of tetrabutyl titanate, tetraisopropyl titanate, tetraoctyl titanate, tetrabutyl zirconate, tetraisopropyl zirconate, dibutyltin dilaurate, and zinc antimony oxide.

[0073] A method for preparing polyurethane mortar flooring includes the following steps:

[0074] Mixed water-based polyurethane mortar floor emulsion:

[0075] By weight, 7-50 parts of dimer acid-based polyester polyol, 8-20 parts of bio-based polyester polyol, 1.5-3 parts of silicone-modified defoamer, 0-0.6 parts of dispersant, 0.2-0.8 parts of emulsifier, 3-10 parts of diol, and 20-35 parts of plasticizer are placed in the first container. The temperature is <50℃, and the mixture is dispersed at a stirring speed of 1000-1200 rpm for 10-15 min. Then, 25-35 parts of water are added, and the mixture is dispersed at a stirring speed of 400-600 rpm for 5-10 min to obtain component A.

[0076] Preparation of isocyanate curing agent:

[0077] Place at least one of WANNATE PM-200, WANNATE IPDI, and WANNATE MDI-50 into a second container and disperse at a stirring speed of 400-600 rpm for 5-10 minutes to obtain component B.

[0078] Preparation of mortar filler:

[0079] By weight, 60-80 parts of 40-70 mesh or 70-140 mesh river sand, 16-25 parts of white cement, and 8-14 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at a speed of 400-600 rpm for 10-15 minutes to obtain component C.

[0080] Preparation of aqueous dispersible pigments:

[0081] Place at least one of the following, Kedi waterborne polyurethane color paste and Yunze oil-in-water color paste, into a third container and disperse at a stirring speed of 400-600 rpm for 5-10 min to obtain component D.

[0082] Mix components A, B, C, and D:

[0083] The mass ratio of components A, B, C, and D is 1:(0.9-1.3):(1.5-6.2):(0-0.1).

[0084] Mix components A, B, and D. If the temperature is 20-35℃, the stirring time is 20-30 s; if the temperature is 10-20℃, the stirring time is 30-50 s. After stirring evenly, a mixed slurry is obtained.

[0085] Then add component C to the mixed slurry. If the temperature is >30℃, the stirring time is 1-1.5 min; if the temperature is 15-30℃, the stirring time is 1.5-2 min; if the temperature is 10-15℃, the stirring time is 2-3 min; if the temperature is <10℃, the stirring time is 3-5 min. After stirring and mixing, it can be cured, and polyurethane mortar flooring can be prepared.

[0086] In this embodiment of the invention, the methods for determining the workability, fluidity, compressive strength, flexural strength, impact resistance, wet surface friction coefficient, water resistance, alkali resistance, acid resistance, oil resistance, and salt water resistance of waterborne polyurethane mortar self-leveling flooring refer to JC / T 2327-2015; wherein, the wet static friction coefficient is measured using an ASM825A static friction coefficient tester.

[0087] Example 1

[0088] Preparation of dimer acid-based polyester polyol: 282.5g of oleic acid and 268.5g of trimethylolpropane were mixed evenly, tetrabutyl titanate was added, and the mixture was subjected to vacuum. The reaction was carried out at 180-240℃ for 6 hours. The reaction endpoint was determined by acid value titration to be below 3mgKOH / g. Then, 565g of dimer acid was added, and the reaction was continued under vacuum for 6 hours. The acid value was determined by acid value titration to be below 3mgKOH / g, and the hydroxyl value was determined by hydroxyl value titration to be 160.8mgKOH / g. The reaction endpoint was determined, and the structure of the obtained product met expectations, yielding dimer acid-based polyester polyol-1. The structure is shown below:

[0089]

[0090] Preparation of waterborne polyurethane mortar floor emulsion: By weight, 17 parts of dimer acid-based polyester polyol-1, 17 parts of first-grade refined castor oil, 1.5 parts of TEGO900 defoamer, 0.1 parts of CDI101 dispersant, 0.2 parts each of TO-7 and CQ100s emulsifiers, 6 parts of PPG600 and dipropylene glycol, and 28 parts of TXIB plasticizer were placed in a container and dispersed at 1000 rpm for 15 min at 25℃. Then, 30 parts of deionized water were slowly added and dispersed at 500 rpm for 10 min to obtain component A. The stability of component A emulsion was observed and recorded, and the results are shown in Table 2.

[0091] Preparation of isocyanate curing agent: Place WANNATE PM-200 in a container and disperse it at a stirring speed of 500 rpm for 5 min to obtain component B.

[0092] Preparation of mortar filler: By weight, 71 parts of 70-140 mesh river sand, 21 parts of white cement, and 8 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at 500 rpm for 15 min to obtain component C.

[0093] Preparation of water-based dispersion pigment: Cody water-based polyurethane pigment is placed in a container and dispersed at a stirring speed of 500 rpm for 10 min to obtain component D.

[0094] By weight, 2.5 parts of component A, 2.8 parts of component B, and 0.1 parts of component D were mixed and stirred at 25°C for 30 seconds to obtain a mixed slurry. Then, 12.5 parts of component C were added to the mixed slurry and stirred at 25°C for 1.5 minutes. The final mixture was poured into a mold for curing. The workability, flowability, impact resistance, compressive strength, flexural strength, surface friction, and acid and alkali corrosion resistance of the final mortar flooring product were tested. The results are shown in Table 2.

[0095] Example 2

[0096] Preparation of waterborne polyurethane mortar floor emulsion: By weight, 28 parts of dimer acid-based polyester polyol-1 prepared in Example 1, 10 parts of first-grade refined castor oil, 1.5 parts of TEGO900 defoamer, 0.1 parts of CDI101 dispersant, 0.3 parts each of TO-7 and CQ100s emulsifiers, 6 parts of PPG600 and triethylene glycol, and 23.8 parts of TXIB plasticizer were placed in a container and dispersed at 1000 rpm for 15 min at 25°C. Then, 30 parts of deionized water were slowly added and dispersed at 500 rpm for 10 min to obtain component A. The stability of component A emulsion was observed and recorded, and the results are shown in Table 2.

[0097] Preparation of isocyanate curing agent: Place WANNATE PM-200 in a container and disperse it at a stirring speed of 500 rpm for 5 min to obtain component B.

[0098] Preparation of mortar filler: By weight, 76 parts of 40-70 mesh river sand, 18 parts of white cement, and 6 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at 500 rpm for 15 min to obtain component C.

[0099] Preparation of water-based dispersion pigment: Cody water-based polyurethane pigment is placed in a container and dispersed at a stirring speed of 500 rpm for 10 min to obtain component D.

[0100] By weight, 2.5 parts of component A, 2.8 parts of component B, and 0.1 parts of component D were mixed and stirred at 25°C for 30 seconds to obtain a mixed slurry. Then, 12.5 parts of component C were added to the mixed slurry and stirred at 25°C for 1.5 minutes. The final mixture was poured into a mold for curing. The workability, flowability, impact resistance, compressive strength, flexural strength, surface friction, and acid and alkali corrosion resistance of the final mortar flooring product were tested. The results are shown in Table 2.

[0101] Example 3

[0102] Preparation of dimer acid-based polyester polyol: 203g of lauric acid, 155g of triethylene glycol, and 137.5g of pentaerythritol were mixed evenly, tetrabutyl titanate was added, and the mixture was vacuum-sealed and reacted at 180-240℃ for 6 hours. The reaction endpoint was confirmed when the acid value was below 3mgKOH / g by acid value titration. Then, 565g of hydrogenated dimer acid was added, and the reaction was continued under vacuum for 6 hours. The acid value was again below 3mgKOH / g by acid value titration, and the hydroxyl value was 168.3mgKOH / g by hydroxyl value titration, confirming that the reaction endpoint had been reached and the structure of the obtained product met expectations, thus obtaining dimer acid-based polyester polyol-2. Since the structure of hydrogenated dimer acid is relatively complex, including monocyclic, chain, and bicyclic structures, the structural formula is not specifically drawn here.

[0103] Preparation of waterborne polyurethane mortar floor emulsion: By weight, 17 parts of dimer acid-based polyester polyol-2, 17 parts of first-grade refined castor oil, 1.5 parts of TEGO900 defoamer, 0.1 parts of CDI101 dispersant, 0.2 parts each of TO-7 and CQ100s emulsifiers, 6 parts of PPG600 and triethylene glycol, and 28 parts of TXIB plasticizer were placed in a container and dispersed at 1000 rpm for 15 min at 25℃. Then, 30 parts of deionized water were slowly added and dispersed at 500 rpm for 10 min to obtain component A. The stability of component A emulsion was observed and recorded, and the results are shown in Table 2.

[0104] Preparation of isocyanate curing agent: Place WANNATE PM-200 in a container and disperse it at a stirring speed of 500 rpm for 5 min to obtain component B.

[0105] Preparation of mortar filler: By weight, 71 parts of 70-140 mesh river sand, 21 parts of white cement, and 8 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at 500 rpm for 15 min to obtain component C.

[0106] Preparation of water-based dispersion pigment: Cody water-based polyurethane pigment is placed in a container and dispersed at a stirring speed of 500 rpm for 10 min to obtain component D.

[0107] By weight, 2.5 parts of component A, 2.8 parts of component B, and 0.1 parts of component D were mixed and stirred at 25°C for 30 seconds to obtain a mixed slurry. Then, 12.5 parts of component C were added to the mixed slurry and stirred at 25°C for 1.5 minutes. The final mixture was poured into a mold for curing. The workability, flowability, impact resistance, compressive strength, flexural strength, surface friction, and acid and alkali corrosion resistance of the final mortar flooring product were tested. The results are shown in Table 2.

[0108] Example 4

[0109] Preparation of waterborne polyurethane mortar floor emulsion: By weight, 17 parts of dimer acid-based polyester polyol-1 prepared in Example 1, 17 parts of Sovermol 750 bio-based polyol, 1.5 parts of TEGO900 defoamer, 0.1 parts of CDI101 dispersant, 0.2 parts each of TO-7 and CQ100s emulsifiers, 6 parts of PPG600 and triethylene glycol, and 28 parts of TXIB plasticizer were placed in a container and dispersed at 1000 rpm for 15 min at 25°C. Then, 30 parts of deionized water were slowly added and dispersed at 500 rpm for 10 min to obtain component A. The stability of component A emulsion was observed and recorded, and the results are shown in Table 2.

[0110] Preparation of isocyanate curing agent: Place WANNATE PM-200 in a container and disperse it at a stirring speed of 500 rpm for 5 min to obtain component B.

[0111] Preparation of mortar filler: By weight, 71 parts of 70-140 mesh river sand, 21 parts of white cement, and 8 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at 500 rpm for 15 min to obtain component C.

[0112] Preparation of water-based dispersion pigment: Cody water-based polyurethane pigment is placed in a container and dispersed at a stirring speed of 500 rpm for 10 min to obtain component D.

[0113] By weight, 2.5 parts of component A, 2.8 parts of component B, and 0.1 parts of component D were mixed and stirred at 25°C for 30 seconds to obtain a mixed slurry. Then, 12.5 parts of component C were added to the mixed slurry and stirred at 25°C for 1.5 minutes. The final mixture was poured into a mold for curing. The workability, flowability, impact resistance, compressive strength, flexural strength, surface friction, and acid and alkali corrosion resistance of the final mortar flooring product were tested. The results are shown in Table 2.

[0114] Example 5

[0115] Preparation of dimer-based polyester polyol: 282.5g of oleic acid and 268.5g of trimethylolpropane were mixed evenly, tetrabutyl titanate was added, and the mixture was evacuated and reacted at 180-240℃ for 6 hours. The reaction endpoint was confirmed when the acid value was below 3mgKOH / g by acid value titration. Then, 565g of hydrogenated dimer acid was added, and the reaction was continued under vacuum for another 6 hours. The acid value was again below 3mgKOH / g by acid value titration, and the hydroxyl value was 152.8 mgKOH / g by hydroxyl value titration, confirming that the reaction endpoint had been reached and the structure of the obtained product met expectations, yielding dimer-based polyester polyol-3. Since the structure of hydrogenated dimer acid is relatively complex, including monocyclic, chain, and bicyclic structures, its structural formula is not specifically drawn here.

[0116] Preparation of waterborne polyurethane mortar floor emulsion: By weight, 17 parts of dimer acid-based polyester polyol-3, 17 parts of first-grade refined castor oil, 1.5 parts of TEGO900 defoamer, 0.3 parts each of TO-7 and CQ100s emulsifiers, 8 parts of PPG600 and dipropylene glycol, and 25.9 parts of TXIB plasticizer were placed in a container and dispersed at 1000 rpm for 15 min at 25℃. Then, 30 parts of deionized water were slowly added and dispersed at 500 rpm for 10 min to obtain component A. The stability of component A emulsion was observed and recorded, and the results are shown in Table 2.

[0117] Preparation of isocyanate curing agent: By weight, 80 parts of WANNATE PM-200 and 20 parts of WANNATEMDI-50 were placed in a container and dispersed at a stirring speed of 500 rpm for 5 min to obtain component B.

[0118] Preparation of mortar filler: By weight, 71 parts of 40-70 mesh river sand, 21 parts of white cement, and 8 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at 500 rpm for 15 min to obtain component C.

[0119] Preparation of water-based dispersion pigment: Cody water-based polyurethane pigment is placed in a container and dispersed at a stirring speed of 500 rpm for 10 min to obtain component D.

[0120] By weight, 2.5 parts of component A, 2.8 parts of component B, and 0.1 parts of component D were mixed and stirred at 25°C for 30 seconds to obtain a mixed slurry. Then, 12.5 parts of component C were added to the mixed slurry and stirred at 25°C for 1.5 minutes. The final mixture was poured into a mold for curing. The workability, flowability, impact resistance, compressive strength, flexural strength, surface friction, and acid and alkali corrosion resistance of the final mortar flooring product were tested. The results are shown in Table 2.

[0121] Comparative Example 1

[0122] Preparation of polyester polyol: 283.7 g of oleic acid and 268.9 g of trimethylolpropane were mixed evenly, tetrabutyl titanate was added, and the mixture was subjected to vacuum. The reaction was carried out at 180-240℃ for 6 h. The reaction endpoint was determined by acid value titration to be below 3 mg KOH / g. Then, 148.3 g of adipic acid was added, and the reaction was carried out under vacuum for another 6 h. The acid value was determined by acid value titration to be below 3 mg KOH / g, and the hydroxyl value was determined by hydroxyl value titration to be 258.1 mg KOH / g. The reaction endpoint was determined, and the structure of the obtained product met expectations, yielding polyester polyol-1. The structure is shown below:

[0123]

[0124] Preparation of waterborne polyurethane mortar floor emulsion: By weight, 17 parts of polyester polyol-1, 17 parts of first-grade refined castor oil, 1.5 parts of TEGO900 defoamer, 0.1 parts of CDI101 dispersant, 0.2 parts each of TO-7 and CQ100s emulsifiers, 6 parts of PPG600 and dipropylene glycol, and 28 parts of TXIB plasticizer were placed in a container and dispersed at 1000 rpm for 15 min at 25℃. Then, 30 parts of deionized water were slowly added and dispersed at 500 rpm for 10 min to obtain component A. The stability of component A emulsion was observed and recorded, and the results are shown in Table 2.

[0125] Preparation of isocyanate curing agent: Place WANNATE PM-200 in a container and disperse it at a stirring speed of 500 rpm for 5 min to obtain component B.

[0126] Preparation of mortar filler: By weight, 71 parts of 70-140 mesh river sand, 21 parts of white cement, and 8 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at 500 rpm for 15 min to obtain component C.

[0127] Preparation of water-based dispersion pigment: Cody water-based polyurethane pigment is placed in a container and dispersed at a stirring speed of 500 rpm for 10 min to obtain component D.

[0128] By weight, 2.5 parts of component A, 2.8 parts of component B, and 0.1 parts of component D were mixed and stirred at 25°C for 30 seconds to obtain a mixed slurry. Then, 12.5 parts of component C were added to the mixed slurry and stirred at 25°C for 1.5 minutes. The final mixture was poured into a mold for curing. The workability, flowability, impact resistance, compressive strength, flexural strength, surface friction, and acid and alkali corrosion resistance of the final mortar flooring product were tested. The results are shown in Table 2.

[0129] Comparative Example 2

[0130] Preparation of polyester polyol: 283.7 g of oleic acid and 268.9 g of trimethylolpropane were mixed evenly, tetrabutyl titanate was added, and the mixture was subjected to vacuum. The reaction was carried out at 180-240℃ for 6 h. The reaction endpoint was determined by acid value titration to be below 3 mg KOH / g. Then, 203.1 g of sebacic acid was added, and the reaction was carried out under vacuum for another 6 h. The acid value was determined by acid value titration to be below 3 mg KOH / g, and the hydroxyl value was determined by hydroxyl value titration to be 258.1 mg KOH / g. The reaction endpoint was determined, and the structure of the obtained product met expectations, yielding polyester polyol-2. The structure is shown below:

[0131]

[0132] Preparation of waterborne polyurethane mortar floor emulsion: By weight, 17 parts of polyester polyol-2, 17 parts of first-grade refined castor oil, 1.5 parts of TEGO900 defoamer, 0.1 parts of CDI101 dispersant, 0.2 parts each of TO-7 and CQ100s emulsifiers, 6 parts of PPG600 and dipropylene glycol, and 28 parts of TXIB plasticizer were placed in a container and dispersed at 1000 rpm for 15 min at 25℃. Then, 30 parts of deionized water were slowly added and dispersed at 500 rpm for 10 min to obtain component A. The stability of component A emulsion was observed and recorded, and the results are shown in Table 2.

[0133] Preparation of isocyanate curing agent: Place WANNATE PM-200 in a container and disperse it at a stirring speed of 500 rpm for 5 min to obtain component B.

[0134] Preparation of mortar filler: By weight, 71 parts of 70-140 mesh river sand, 21 parts of white cement, and 8 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at 500 rpm for 15 min to obtain component C.

[0135] Preparation of water-based dispersion pigment: Cody water-based polyurethane pigment is placed in a container and dispersed at a stirring speed of 500 rpm for 10 min to obtain component D.

[0136] By weight, 2.5 parts of component A, 2.8 parts of component B, and 0.1 parts of component D were mixed and stirred at 25°C for 30 seconds to obtain a mixed slurry. Then, 12.5 parts of component C were added to the mixed slurry and stirred at 25°C for 1.5 minutes. The final mixture was poured into a mold for curing. The workability, flowability, impact resistance, compressive strength, flexural strength, surface friction, and acid and alkali corrosion resistance of the final mortar flooring product were tested. The results are shown in Table 2.

[0137] Comparative Example 3

[0138] Preparation of waterborne polyurethane mortar floor emulsion: By weight, 34 parts of first-grade refined castor oil, 1.5 parts of TEGO900 defoamer, 0.1 parts of CDI101 dispersant, 0.2 parts each of TO-7 and CQ100s emulsifiers, 6 parts of PPG600 and dipropylene glycol, and 28 parts of TXIB plasticizer were placed in a container and dispersed at 1000 rpm for 15 min at 25℃. Then, 30 parts of deionized water were slowly added and dispersed at 500 rpm for 10 min to obtain component A. The stability of component A emulsion was observed and recorded, and the results are shown in Table 2.

[0139] Preparation of isocyanate curing agent: Place WANNATE PM-200 in a container and disperse it at a stirring speed of 500 rpm for 5 min to obtain component B.

[0140] Preparation of mortar filler: By weight, 71 parts of 70-140 mesh river sand, 21 parts of white cement, and 8 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at 500 rpm for 15 min to obtain component C.

[0141] Preparation of water-based dispersion pigment: Cody water-based polyurethane pigment is placed in a container and dispersed at a stirring speed of 500 rpm for 10 min to obtain component D.

[0142] By weight, 2.5 parts of component A, 2.8 parts of component B, and 0.1 parts of component D were mixed and stirred at 25°C for 30 seconds to obtain a mixed slurry. Then, 12.5 parts of component C were added to the mixed slurry and stirred at 25°C for 1.5 minutes. The final mixture was poured into a mold for curing. The workability, flowability, impact resistance, compressive strength, flexural strength, surface friction, and acid and alkali corrosion resistance of the final mortar flooring product were tested. The results are shown in Table 2.

[0143] Comparative Example 4

[0144] Preparation of waterborne polyurethane mortar floor emulsion: By weight, 34 parts of Sovermol 750 bio-based polyol, 1.5 parts of TEGO900 defoamer, 0.1 parts of CDI101 dispersant, 0.3 parts each of TO-7 and CQ100s emulsifiers, 6 parts of PPG600 and dipropylene glycol, and 28 parts of TXIB plasticizer were placed in a container and dispersed at 1000 rpm for 15 min at 25℃. Then, 30 parts of deionized water were slowly added and dispersed at 500 rpm for 10 min to obtain component A. The stability of component A emulsion was observed and recorded, and the results are shown in Table 2.

[0145] Preparation of isocyanate curing agent: Place WANNATE PM-200 in a container and disperse it at a stirring speed of 500 rpm for 5 min to obtain component B.

[0146] Preparation of mortar filler: By weight, 71 parts of 70-140 mesh river sand, 21 parts of white cement, and 8 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at 500 rpm for 15 min to obtain component C.

[0147] Preparation of water-based dispersion pigment: Cody water-based polyurethane pigment is placed in a container and dispersed at a stirring speed of 500 rpm for 10 min to obtain component D.

[0148] By weight, 2.5 parts of component A, 2.8 parts of component B, and 0.1 parts of component D were mixed and stirred at 25°C for 30 seconds to obtain a mixed slurry. Then, 12.5 parts of component C were added to the mixed slurry and stirred at 25°C for 1.5 minutes. The final mixture was poured into a mold for curing. The workability, flowability, impact resistance, compressive strength, flexural strength, surface friction, and acid and alkali corrosion resistance of the final mortar flooring product were tested. The results are shown in Table 2.

[0149] Comparative Example 5

[0150] Preparation of waterborne polyurethane mortar floor emulsion: By weight, 17 parts of Sovermol 750 bio-based polyol, 17 parts of first-grade refined castor oil, 1.5 parts of TEGO900 defoamer, 0.1 parts of CDI101 dispersant, 0.2 parts each of TO-7 and CQ100s emulsifiers, 6 parts of PPG600 and dipropylene glycol, and 28 parts of TXIB plasticizer were placed in a container and dispersed at 1000 rpm for 15 min at 25℃. Then, 30 parts of deionized water were slowly added and dispersed at 500 rpm for 10 min to obtain component A. The stability of component A emulsion was observed and recorded, and the results are shown in Table 2.

[0151] Preparation of isocyanate curing agent: Place WANNATE PM-200 in a container and disperse it at a stirring speed of 500 rpm for 5 min to obtain component B.

[0152] Preparation of mortar filler: By weight, 71 parts of 70-140 mesh river sand, 21 parts of white cement, and 8 parts of alkaline earth metal hydroxide are added to a dry mixing equipment and stirred at 500 rpm for 15 min to obtain component C.

[0153] Preparation of water-based dispersion pigment: Cody water-based polyurethane pigment is placed in a container and dispersed at a stirring speed of 500 rpm for 10 min to obtain component D.

[0154] By weight, 2.5 parts of component A, 2.8 parts of component B, and 0.1 parts of component D were mixed and stirred at 25°C for 30 seconds to obtain a mixed slurry. Then, 12.5 parts of component C were added to the mixed slurry and stirred at 25°C for 1.5 minutes. The final mixture was poured into a mold for curing. The workability, flowability, impact resistance, compressive strength, flexural strength, surface friction, and acid and alkali corrosion resistance of the final mortar flooring product were tested. The results are shown in Table 2.

[0155] Infrared spectroscopy analysis was performed on the dimer acid-based polyester polyol-1 prepared in Example 1, the dimer acid-based polyester polyol-2 prepared in Example 3, the polyester polyol-1 prepared in Comparative Example 1, and the polyester polyol-2 prepared in Comparative Example 2. The detection results are as follows: Figure 1 As shown, all synthesized polyester polyols were obtained at 1650 cm⁻¹. -1 Up to 1750cm -1 Characteristic absorption peaks of ester bonds were observed within the range, indicating that the esterification reaction proceeded successfully. Furthermore, at 3000 cm⁻¹... -1 A distinct broad peak was observed in the vicinity, which is the characteristic absorption peak of hydroxyl (-OH), indicating that the ends of the obtained polyol molecular chains are all hydroxyl-terminated, thus possessing functional groups for further reaction with isocyanates.

[0156] Table 1 Summary of components in Examples 1-5 and Comparative Examples 1-5

[0157]

[0158] Table 2 Performance results of mortar flooring products from Examples 1-5 and Comparative Examples 1-5

[0159]

[0160] (Continued)

[0161]

[0162] Comparative results from Examples 1, 1, and 2 show that the stability of the polyol emulsion is significantly improved only when a dimer acid branched structure is introduced into the polyester polyol structure, achieving a shelf life of over 20 days without stratification. Emulsions prepared using terols synthesized from sebacic acid or adipic acid exhibit poor stability. Furthermore, the polyol emulsion containing the dimer acid branched structure demonstrates superior fluidity and workability during flooring construction. The resulting flooring material significantly outperforms emulsions prepared from sebacic acid or adipic acid-based polyols in terms of compressive strength, flexural strength, impact resistance, and corrosion resistance.

[0163] Comparing the test results of Example 4 and Comparative Example 4, it is evident that introducing polyols with dimer acid branched structures into the polyol emulsion system significantly improves the stability of the emulsion and the wet surface anti-slip performance of the flooring. Compared to the system using only Sovermol 750 bio-based polyols, the emulsion with partial addition of dimer acid-based polyester polyols exhibits significantly improved stability, remaining stratified for over 20 days; the wet surface friction coefficient of the prepared flooring reaches 0.67, far exceeding the 0.47 achieved with the entire Sovermol 750 system. This system is also superior to the control group in Comparative Example 5, which replaced the dimer acid-type polyol with an equal amount of castor oil polyol: the latter emulsion showed obvious stratification within 3 days, and the wet surface friction coefficient of the flooring was only 0.50. These comparisons demonstrate that the dimer acid structure plays a unique role in improving emulsion stability and floor surface anti-slip performance, with significantly better effects than commonly used bio-based polyols.

[0164] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An aqueous polyurethane mortar floor emulsion, characterized in that, Comprise the following components: Dimer acid-based polyester polyol, bio-based polyester polyol, defoaming agent, dispersant, emulsifier, dihydric alcohol, plasticizer and water, and the mass ratio of the eight groups of raw materials is: (7-50): (8-20): (1.5-3): (0-0.6): (0.2-0.8): (3-10): (20-35): (25-35); The preparation method of the dimer acid-based polyester polyol comprises the following steps: Mix 282.5g of oleic acid and 268.5g of trimethylolpropane uniformly, add tetrabutyl titanate, vacuumize, and react at a temperature of 180-240℃ for 6h; when the acid value is less than 3mgKOH / g as measured by acid value titration, it is determined that the reaction has reached the end point; then add 565g of dimer acid, continue vacuumizing, and react for 6h; when the acid value is less than 3mgKOH / g as measured by acid value titration and the hydroxyl value is 160.8mgKOH / g as measured by hydroxyl value titration, it is determined that the reaction has reached the end point, and the dimer acid-based polyester polyol is obtained.

2. An aqueous polyurethane mortar floor emulsion, characterized in that Comprise the following components: Dimer acid-based polyester polyol, bio-based polyester polyol, defoaming agent, dispersant, emulsifier, dihydric alcohol, plasticizer and water, and the mass ratio of the eight groups of raw materials is: (7-50): (8-20): (1.5-3): (0-0.6): (0.2-0.8): (3-10): (20-35): (25-35); The preparation method of the dimer acid-based polyester polyol comprises the following steps: Mix 203g of lauric acid, 155g of triethylene glycol and 137.5g of pentaerythritol uniformly, add tetrabutyl titanate, vacuumize, and react at a temperature of 180-240℃ for 6h; when the acid value is less than 3mgKOH / g as measured by acid value titration, it is determined that the reaction has reached the end point; then add 565g of hydrogenated dimer acid, continue vacuumizing, and react for 6h; when the acid value is less than 3mgKOH / g as measured by acid value titration and the hydroxyl value is 168.3mgKOH / g as measured by hydroxyl value titration, it is determined that the reaction has reached the end point, and the dimer acid-based polyester polyol is obtained.

3. An aqueous polyurethane mortar floor emulsion, characterized in that, Comprise the following components: Dimer acid-based polyester polyol, bio-based polyester polyol, defoaming agent, dispersant, emulsifier, dihydric alcohol, plasticizer and water, and the mass ratio of the eight groups of raw materials is: (7-50): (8-20): (1.5-3): (0-0.6): (0.2-0.8): (3-10): (20-35): (25-35); The preparation method of the dimer acid-based polyester polyol comprises the following steps: Mixing 282.5g of oleic acid and 268.5g of trimethylolpropane uniformly, adding tetrabutyl titanate, vacuumizing, reacting for 6h at a temperature of 180-240℃, and determining that the reaction has reached the end point when the acid value is less than 3mgKOH / g by acid value titration; then adding 565g of hydrogenated dimer acid, continuing vacuumizing, and reacting for 6h, and determining that the reaction has reached the end point when the acid value is less than 3mgKOH / g by acid value titration and the hydroxyl value is 152.8mgKOH / g by hydroxyl value titration, to obtain the dimer acid-based polyester polyol. 4.The waterborne polyurethane mortar floor emulsion according to any one of claims 1-3, characterized in that, The bio-based polyester polyol is at least one of BASF Sovermol 750, Sovermol 1006 and Sovermol 908 or is first refined castor oil.

5. The waterborne polyurethane mortar floor emulsion according to any one of claims 1-3, characterized in that, The defoaming agent is a silicone-modified defoaming agent, and the silicone-modified defoaming agent is at least one of CDI4900 of Shenzhen Haiwei Auxiliary New Material Technology Co., Ltd. and DEGUSTAR TEGO-900.

6. The waterborne polyurethane mortar floor emulsion according to any one of claims 1-3, characterized in that, The dispersant is at least one of CDI104 and CDI101 of Shenzhen Haiwei Auxiliary New Material Technology Co., Ltd. The emulsifier is at least one of BASF Lutensol TO5, Lutensol TO7, Lutensol TO9 and REWOQUAT® CQ100S. The dihydric alcohol is at least one of triethylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol-600, polypropylene glycol-1000 and polypropylene glycol-2000.

7. Use of the waterborne polyurethane mortar floor emulsion according to any one of claims 1-3, comprising the following steps: Mixing the waterborne polyurethane mortar floor emulsion: Putting 7-50 parts of the dimer acid-based polyester polyol, 8-20 parts of the bio-based polyester polyol, 1.5-3 parts of the defoaming agent, 0-0.6 parts of the dispersant, 0.2-0.8 parts of the emulsifier, 3-10 parts of the dihydric alcohol and 20-35 parts of the plasticizer into a first container, with a temperature <50℃, dispersing for 10-15 min at a stirring speed of 1000-1200rpm, and then adding 25-35 parts of water, dispersing for 5-10 min at a stirring speed of 400-600rpm, to obtain component A; Preparing the isocyanate curing agent: Putting at least one of WANNATE PM-200, WANNATE IPDI and WANNATE MDI-50 into a second container, dispersing for 5-10 min at a stirring speed of 400-600rpm, to obtain component B; Preparing the mortar filler: Putting 60-80 parts of river sand with a size of 40-70 mesh or 70-140 mesh, 16-25 parts of white cement and 8-14 parts of alkaline earth metal hydroxide into a dry mixing device, stirring for 10-15 min at a stirring speed of 400-600rpm, to obtain component C; Preparing the waterborne dispersed color paste: Putting at least one of the KODI waterborne polyurethane color paste and the Yunze water-in-oil color paste into a third container, dispersing for 5-10 min at a stirring speed of 400-600rpm, to obtain component D; Mixing A, B, C, D components: Mixing the A component, B component and D component evenly, to obtain mixed slurry; Then add the C component into the mixed slurry, mix evenly, and after solidification, polyurethane mortar floor is prepared; The mass ratio of the A, B, C, D components is 1:(0.9-1.3):(1.5-6.2):(0-0.1).

8. Use of the aqueous polyurethane mortar floor emulsion according to claim 7, characterized in that, When mixing the A component, B component and D component, if the temperature is 20-35℃, the stirring time is 20-30 s; if the temperature is 10-20℃, the stirring time is 30-50 s.

9. Use of the aqueous polyurethane mortar floor emulsion according to claim 7, characterized in that, When adding the C component into the mixed slurry, if the temperature is >30℃, the stirring time is 1-1.5 min; if the temperature is 15-30℃, the stirring time is 1.5-2 min; if the temperature is 10-15℃, the stirring time is 2-3 min; if the temperature is <10℃, the stirring time is 3-5 min.

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