Waterborne polyurethane mortar skirting line material and preparation method and application thereof

Abstract

This invention discloses a water-based polyurethane mortar skirting board material, its preparation method, and its application, belonging to the field of building materials technology. The water-based polyurethane mortar skirting board material of this invention comprises four components: A, B, C, and D. Component A is a mixture of polyol, water, and additives; component B is an aliphatic isocyanate curing agent; component C is a mixture of white cement, active powder, additives, and quartz sand; and component D is a mixture of color powder, polyol, and additives. The water-based polyurethane mortar skirting board material of this invention exhibits excellent thixotropy and anti-sagging properties, a smooth and flat surface, requires no topcoat, and can be shaped into rounded corners in one step using specialized tools during construction. It has strong adhesion to walls and floors, forming a seamless whole. This material is environmentally friendly, odorless, does not yellow, has good toughness, and is weather-resistant and moisture-resistant, solving the problems of cumbersome processes, poor strength, and rough surfaces associated with traditional methods. The water-based polyurethane mortar skirting board material provided by this invention has broad application prospects and promotional value.

Description

Technical Field

[0001] This invention belongs to the field of building materials technology, and relates to a water-based polyurethane mortar skirting board material, its preparation method and application. Background Technology

[0002] Baseboards are an important component in interior decoration used to cover the joints between walls and floors, serving the functions of protecting walls, preventing water seepage, and beautifying the environment.

[0003] Currently, the traditional process for making water-based polyurethane mortar rounded corner skirting boards generally adopts a "two-step method": First, the water-based polyurethane mortar floor coating is manually mixed with 5-7 times the amount of quartz sand until it reaches a loose sand state, and then compacted and shaped using rounded corner tools to form a rough and porous blank; after the blank has set, colored paint or topcoat is applied for surface finishing.

[0004] This process has many drawbacks: 1. The process is complicated, requiring two separate construction phases, which is time-consuming, labor-intensive, and results in high labor costs.

[0005] 2. Due to the addition of a large amount of quartz sand, the material strength is greatly reduced, its impact resistance is poor, and it is prone to cracking and damage.

[0006] 3. The surface of the rounded corner blank is rough and porous, and it must be covered with topcoat, so a smooth surface cannot be obtained in one go.

[0007] 4. The size of the rounded corners is not easy to make small, as it affects the aesthetics.

[0008] In addition, the manufacturing process of using epoxy coatings as the topcoat for rounded corners or as the cementing material for the blank makes the rounded corners prone to poor toughness and gradually yellowing, resulting in a limited service life and poor aesthetics.

[0009] Traditional water-based polyurethane mortar manufacturing processes involve two steps: corner shaping and topcoat application. First, the water-based polyurethane mortar floor coating is mixed with 5-7 times its volume of quartz sand, manually stirred into a loose sand state, and then compacted to the corner using a corner shaping tool to refine the shape, resulting in a rough, porous, rounded corner blank. After the rounded corner blank has set, a colored paint is applied to finish the surface. This method is time-consuming and labor-intensive, and it's difficult to make the rounded corners small. Furthermore, due to the addition of several times the volume of quartz sand, the rounded corner material itself has poor strength and cannot withstand impact.

[0010] Therefore, developing a water-based polyurethane mortar skirting board material that can be formed in one step, has high strength, a smooth surface, does not discolor, and is environmentally friendly has significant market value. Summary of the Invention

[0011] Based on the above technical requirements, the purpose of this invention is to provide a waterborne polyurethane mortar skirting board material, its preparation method, and its application. This invention adopts an aliphatic isocyanate curing system, whose molecular structure does not contain benzene ring groups that are prone to yellowing. It utilizes urea bonds and urethane bonds to give the material extremely high photothermal stability. The provided waterborne polyurethane mortar skirting board material is particularly suitable for door and window openings, areas exposed to direct sunlight, and long-term water immersion environments where weather resistance requirements are stringent. It has strong industrial operability, is easy to scale up production, and has promotional significance.

[0012] To achieve the above objectives, the present invention is implemented through the following solution: This invention provides a water-based polyurethane mortar skirting board material, comprising four components: A, B, C, and D. Component A is a mixture of polyol, water, and additives; component B is an aliphatic isocyanate curing agent; component C is a mixture of white cement, active powder, additives, and quartz sand; and component D is a mixture of colorant, polyol, and additives. By weight: component A: 9-20 parts; component B: 15-37 parts; component C: 40-90 parts; and component D: 1.5-5 parts.

[0013] Furthermore, the polyols in component A or component D include at least two of the following: castor oil, castor oil-modified polyols, hydrogenated castor oil, soybean oil-modified polyols, polypropylene oxide ether glycol, polytetrahydrofuran ether glycol, polycarbonate diol, polypentyl adipate neopentyl glycol, neopentyl glycol, and trimethylolpropane.

[0014] Furthermore, the aliphatic isocyanate curing agent is hexamethylene diisocyanate trimer (HDI trimer).

[0015] Furthermore, the raw materials in component A, by weight, are: 50-80 parts polyol, 20-45 parts water, and 1-5 parts additives; the raw materials in component C, by weight, are: 30-95 parts white cement, 2-20 parts active powder, 0-70 parts quartz sand, and 0.2-2 parts additives; the raw materials in component D, by weight, are: 30-60 parts color powder, 39-68 parts polyol, and 1-5 parts additives.

[0016] Furthermore, the active powder is a mixture of quicklime and calcium carbonate.

[0017] Furthermore, any of the additives in component A, component C, or component D includes at least one of thixotropic additives, dispersants, water-reducing agents, defoamers, anti-settling agents, retarders, and catalysts.

[0018] Furthermore, the additives include any three or more combinations of silica, fumed silica-modified polyurea, polyamide wax, dibutyltin disilicate, organobismuth, organozirconium, organozinc, organotin, polyether-modified organosilicon, and stannous octoate.

[0019] Furthermore, the polyol in component D is the same as the polyol in component A.

[0020] Furthermore, the water-based polyurethane mortar skirting board material has a tensile strength of 1.5-1.7 MPa, an elongation at break of 0.2-0.4%, a 7-day flexural strength of 4-8 MPa, a Shore D hardness of 40-45, an operating temperature of 0-30℃, and an operating time of 18-25 min.

[0021] This invention also provides a method for preparing the aforementioned water-based polyurethane mortar skirting board material, comprising the following steps: (1) Preparing component A: Mix the polyol mixture, water and additives in component A evenly and stir until there are no particles; (2) Prepare component B; (3) Pre-fabrication of component C: Mix white cement, active powder and quartz sand in component C evenly; (4) Preparing component D: Mix the color powder, polyol and additives in component D evenly; (5) Mix the components A, B, C and D together and stir until homogeneous to obtain water-based polyurethane mortar skirting board material.

[0022] Furthermore, in steps (1) to (4), the components are mixed using a conventional electric stirring device, with the mixing time controlled at 1.5-3 min and the mixing temperature controlled at 10-30℃.

[0023] Furthermore, the stirring time in step (3) is 20-30 min.

[0024] This invention also provides the application of the aforementioned water-based polyurethane mortar skirting board material in the construction of wall and floor joints under different working environments.

[0025] Furthermore, the working environment includes door and window openings, areas exposed to direct sunlight, environments with long-term water exposure, basements, or cold storage facilities.

[0026] Furthermore, after construction, the water-based polyurethane mortar skirting board material can form a rounded skirting board at the junction of the wall and the floor in one step, which can make the wall and the floor form a seamless integral structure. After curing, it has excellent adhesion, impact resistance, moisture resistance and weather resistance, and the material has good recoatability.

[0027] Furthermore, the specific construction method of the arc-shaped skirting board includes: applying the evenly mixed water-based polyurethane mortar skirting board material to the corner of the wall, shaping it with a round tube or arc-shaped corner trowel, forming an arc-shaped corner structure in one step, and obtaining a smooth and flat surface without the need to apply topcoat.

[0028] Furthermore, the polyurethane mortar skirting board material used in this invention has no irritating odor during construction, does not yellow, has good toughness, is safe, environmentally friendly, beautiful and easy to construct, and has excellent adhesion to walls and floors, forming a dense, hard, moisture-resistant and weather-resistant skirting board.

[0029] Compared with the prior art, the present invention has the following beneficial effects: 1. Excellent resistance to yellowing and weathering. Traditional epoxy coatings or aromatic isocyanate-based polyurethane materials are prone to benzene ring oxidation or urethane degradation under ultraviolet light or humid and hot environments, leading to yellowing and chalking of the skirting board surface, severely affecting the decorative effect and service life. This invention uses an HDI trimer aliphatic isocyanate curing system, whose molecular structure does not contain easily yellowing benzene ring groups. Utilizing urea bonds and urethane bonds, it gives the material extremely high photothermal stability, making it particularly suitable for door and window openings, areas exposed to direct sunlight, and long-term water immersion environments with stringent weather resistance requirements.

[0030] 2. High toughness and crack resistance Traditional aromatic waterborne polyurethane mortars and epoxy resins, after curing, form a highly cross-linked, rigid three-dimensional network with an elongation rate typically below 5%. This network is prone to stress concentration and cracking under substrate shrinkage or slight vibration, and lacks sufficient toughness. In this invention, aliphatic isocyanates react with a mixture of polyols in component A (including castor oil derivatives, polyether / polyester diols, etc.) to form a block polyurethane structure with adjustable soft and hard segments. The flexible segments impart a degree of flexibility to the material, achieving a balance of rigidity and flexibility in mechanical properties. This reduces cracking at rounded corners and better withstands displacement deformation on both sides of floor expansion joints.

[0031] 3. No harmful substances are released throughout the entire life cycle. Epoxy coatings and some solvent-based polyurethanes may leave unreacted small-molecule epoxy resins, amine curing agents, or free TDI during application and aging, posing risks of VOC release and skin sensitization. The material of this invention uses water as the dispersion medium, and component B is a high-boiling-point, low-volatility aliphatic isocyanate oligomer. No isocyanate monomers are released during application, and no free diisocyanate is detected after 168 hours of immersion in water following curing. This meets the hygiene evaluation requirements of GB / T 17219 for drinking water transmission and distribution equipment and can be directly applied in hospitals, food processing plants, and residential indoor spaces.

[0032] 4. Streamlined processes and improved appearance quality Traditional rounded corner processes require multiple steps: "laying and scraping the blank, sanding, applying a sealing primer, and then applying a topcoat of colored paint." This results in a high risk of interlayer adhesion problems, and the epoxy topcoat has poor leveling properties, easily leaving brush marks. The material of this invention possesses both structural reinforcement and decorative film-forming functions. A smooth surface can be achieved in a single rounded corner shaping process, eliminating the need for topcoat application and sanding to generate dust, thus reducing the construction time per meter by more than 60%.

[0033] 5. The rounded corner material prepared by the present invention using aliphatic isocyanate curing agent solves the pain points of the existing rounded corner material, such as lengthy process, yellowing and brittleness. At the same time, it achieves a technological leap in high weather resistance, high impact resistance, non-yellowing and no need for topcoat, which significantly improves the engineering adaptability and aesthetic value of polyurethane mortar skirting board. Attached Figure Description

[0034] Figure 1 The image shows the flexural strength curve of the material prepared in Example 1.

[0035] Figure 2 The image shows the flexural strength curve of the material prepared in Example 2. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0037] This invention provides a material for preparing waterborne polyurethane mortar skirting boards. The material comprises four components: A, B, C, and D. Component A is a mixture of polyol, water, and additives; component B is an aliphatic isocyanate curing agent HDI trimer; component C is a mixture of white cement, active powder, additives, and quartz sand; and component D is a mixture of colorant, polyol, and additives.

[0038] Example 1 This embodiment provides a method for preparing and applying a water-based polyurethane mortar skirting board material. The water-based polyurethane mortar skirting board prepared in this embodiment is suitable for most indoor floor skirting board projects, specifically including the following: 1. Distribution ratio of each group (in parts by mass) Component A contains three items (1)-(3): by mass, (1) a mixture of polyols (53 parts in total), including: 30 parts of castor oil modified polyol, 1 part of poly(propylene oxide ether diol) (PPG, molecular weight 2000), 1 part of polytetrahydrofuran ether diol (PTMG, molecular weight 2000), and 21 parts of trimethylolpropane; (2) 44 parts of deionized water; (3) 3 parts of additives (3 parts in total), including: 1.2 parts of thixotropic additive (polyurea), 0.5 parts of silica (fumed silica), 0.1 parts of organobismuth, 0.1 parts of organozinc, 0.1 parts of organotin, and 1.0 parts of defoamer (polyether modified organosilicon).

[0039] Component B contains: HDI trimer.

[0040] Component C contains: 32 parts white silicate cement (grade 52.5), 2 parts quicklime, 1 part calcium carbonate, 64 parts graded quartz sand (40-120 mesh), and 1 part powder additive (including water-reducing agent and retarder).

[0041] Component D contains: 45 parts of titanium dioxide (rutile type), 52 parts of the same polyol mixture as Component A, and 3 parts of additives (including 2 parts of dispersant and 1 part of defoamer).

[0042] 2. Preparation method (1) Preparation of component A: At room temperature, add polyol mixture, deionized water and additives to the reactor, stir at 600 rpm for 15 min, and degas under vacuum for 20 min; (2) Pre-fabrication of component C: Add white cement, active powder, quartz sand and powder additives to a horizontal powder mixer and stir for 20 minutes; (3) Preparing component D: Add titanium dioxide, polyol and additives to a high-speed disperser and disperse at 1500 rpm for 30 min until the fineness is ≤30 μm; (4) On-site construction: Weigh according to A:B:C:D=10:22:66:2 (mass ratio), and stir with an electric mixer at low speed for 1.5-3 minutes until a uniform flow state is reached.

[0043] 3. Performance Testing Using GB / T 17671-1999 as the testing standard, the performance of the waterborne polyurethane mortar skirting board material prepared in this embodiment was measured as follows: (1) Construction performance: The working time at room temperature is 20 minutes; (2) Mechanical properties: 7-day flexural strength 6.8 MPa, Shore D hardness 42; (3) Water resistance: No bubbling or peeling after immersion in water for 7 days.

[0044] The flexural strength curve of the waterborne polyurethane mortar skirting board material prepared in this embodiment is shown in the figure below. Figure 1 As shown.

[0045] Example 2 This embodiment provides a preparation and application of water-based polyurethane mortar skirting board material. The material provided in this embodiment focuses on low-temperature environment construction and high toughness requirements, and is suitable for basements, cold storage and other scenarios.

[0046] 1. Distribution ratio of each group Component A contains three items (1)-(3): by mass: (1) a mixture of polyols (80 parts in total), including: 29 parts castor oil, 2 parts soybean oil modified polyol, 1 part hydrogenated castor oil, 1 part polypentyl adipate neopentyl glycol (PNA, molecular weight 1500), 20 parts neopentyl glycol; (2) 42 parts deionized water; (3) 2 parts additives (2 parts in total), including 0.1 parts stannous octoate, 0.1 parts dibutyltin dilaurate, 0.1 parts organic zirconium, and 1 part defoamer.

[0047] Component B contains: HDI trimer.

[0048] Component C contains, by weight, 30 parts of white silicate cement (grade 42.5), 5 parts of quicklime, 5 parts of calcium carbonate, 40 parts of graded quartz sand (80-200 mesh), and 1.0 part of powder water-reducing agent.

[0049] Component D contains, by weight, 30 parts of iron oxide black, 68 parts of a polyol mixture identical to that in Component A, and 2 parts of additives, including 1.2 parts of wetting and dispersing agent and 0.8 parts of anti-settling agent.

[0050] 2. Preparation method (1) Preparing component A: Mix the polyol mixture, deionized water, and additives and add them to the reactor. Control the temperature at 30±2℃, stir at 600rpm for 15min, and degas under vacuum for 20min; component B does not require heating.

[0051] (2) The pre-preparation operations of components C and D are described in steps (2) and (3) of the preparation method provided in Example 1.

[0052] On-site construction shall weigh according to the ratio of A:B:C:D=9:23:65:2 (mass ratio).

[0053] 3. Performance Testing Using GB / T 17671-1999 as the testing standard, the properties of the waterborne polyurethane mortar skirting board prepared in this embodiment were measured as follows: (1) Construction performance: It can still flow in a low temperature environment of 5℃, and the working time is 20 minutes; (2) Mechanical properties: 7-day flexural strength 5 MPa; Shore D hardness 41 (3) Water resistance: No bubbling or peeling after immersion in water for 7 days.

[0054] The flexural strength curve of the waterborne polyurethane mortar skirting board material prepared in this embodiment is shown in the figure below. Figure 2 As shown.

[0055] Example 3 This embodiment provides the preparation and application of water-based polyurethane mortar skirting board material. The material provided in this embodiment focuses on rapid hardening, high surface hardness and colorful decorative effect, and is suitable for industrial and mining enterprises, logistics warehouses and other scenarios with high requirements for construction period and wear resistance.

[0056] I. Distribution ratio of each group Component A contains three items (1)-(3): by mass, (1) a mixture of polyols (65 parts in total): 5 parts of polypropylene ether diol (PPG, molecular weight 2000), 20 parts of polycarbonate diol (PCDL, molecular weight 2000), and 40 parts of castor oil modified polyol. (2) 30 parts of deionized water. (3) 5 parts of additives (5 parts in total), including: 2.0 parts of thixotropic additive (fumed silica modified polyurea), 1.2 parts of polyamide wax, 0.8 parts of HPMC, 0.5 parts of organic bismuth catalyst, and 0.5 parts of defoamer (polyether modified organosilicon).

[0057] Component B contains: HDI trimer.

[0058] Component C comprises, by weight, 28 parts of white silicate cement (grade 42.5), 25 parts of active mineral admixture (specific surface area ≥400m² / kg, 28d activity index ≥90%, SiO2+Al2O3 content ≥70%, loss on ignition ≤5%), 46.5 parts of graded quartz sand (20-70 mesh), and 0.5 parts of powder additives.

[0059] Component D contains, by weight, 60 parts of iron oxide red, 39 parts of a polyol mixture identical to that in Component A, and 1 part of additives, including 0.6 parts of dispersant and 0.4 parts of defoamer.

[0060] II. Preparation Method Components A, B, and D are prefabricated in the same manner as in Example 1; The stirring time for component C is extended to 25 minutes to ensure uniformity.

[0061] On-site construction shall weigh according to the ratio of A:B:C:D=12:15:80:1.5 (mass ratio).

[0062] III. Performance Testing (1) Construction performance: Surface dry at 25℃ for ≤24h, still flowable at 5℃, and operable for 20min; (2) Mechanical properties: 7-day flexural strength 4.7 MPa, Shore D hardness 42; (3) Water resistance: No bubbling or peeling after immersion in water for 7 days.

[0063] Example 4 This embodiment provides a construction case of water-based polyurethane mortar skirting board material applied to the rounded corner skirting board in a food factory. This embodiment elaborates on the application method, construction process and final molding effect of the material provided by the present invention in a real engineering scenario. Through parallel comparison with traditional processes, it fully demonstrates the technical advantages of the present invention: one-time molding, no need for topcoat, and seamless integral molding.

[0064] I. Application Scenarios Project Overview: The walls of a food factory are finished with a full coat of putty and latex paint, and the floor is a water-based polyurethane mortar floor. The materials used are the formulation system described in Example 1 of this invention.

[0065] II. Construction Process Flow 1. Base treatment and surveying and setting out (1) Base cleaning: Use an angle grinder with diamond grinding discs to remove dust, oil stains and loose attachments from the corners of the wall, and use a vacuum cleaner for deep cleaning to ensure that the base is solid, dry and free of standing water.

[0066] (2) Laying out and positioning: Set up elevation control lines on both sides of the corner of the wall, with a radius of 50mm for the arc corner, the upper edge flush with the wall surface, and the lower edge transitioning naturally with the ground; set thickness control points every 3m.

[0067] 2. On-site mixing of materials Add components A and D to a 20L clean container and stir at 1000rpm for 30 seconds using a handheld twin-shaft electric stirrer or a water drill to allow the color paste and polyol aqueous phase to initially blend. Add component B to the container and stir for 3 seconds. The system will gradually emulsify and become a uniform milky white. Add component C while stirring for 1.5-3 minutes until the material is uniform.

[0068] The amount of material mixed at one time should be controlled between 10-20kg, and the time from mixing to use should be ≤20 minutes; the on-site temperature should be 22℃ and the humidity should be 58%.

[0069] 3. Rounded corner shaping (one-step forming process) Immediately after mixing, pour the mixture into the corner. Using a special rounded corner trowel (50mm radius arc), take an appropriate amount of the mixture and apply it from bottom to top at a 45° angle to the wall, ensuring the material fully fills the triangular area of ​​the corner. Use the rounded corner trowel to evenly scrape along the corner, removing excess material to create a rounded outline. After filling any imperfections, smooth the surface again. Use a straight-edged trowel to level the junction of the rounded corner and the wall, eliminating any trowel marks. Set up a warning area within 2 hours of application to prevent trampling and contamination.

[0070] Unlike the traditional process of "making a rough blank, drying and then sanding, and then applying a topcoat", this embodiment only requires one shaping as described above. After finishing, a smooth, rounded corner surface can be obtained directly. Finishing does not require applying excessive pressure, and the thixotropic leveling properties of the material itself can eliminate trowel marks.

[0071] Compared with traditional methods, the construction time per linear meter is reduced from 30 minutes to 10 minutes, increasing efficiency by 300%.

[0072] 4. Maintenance Keep the ambient temperature ≥15℃ within 6 hours after construction, and avoid strong ventilation and direct sunlight; it can be put into use after 24 hours of surface drying, and reaches the design strength in 7 days; no watering or covering is required, the material itself has good water retention and no shrinkage or cracking.

[0073] This invention, through the synergistic design of a fully aliphatic isocyanate system and specialized polyol / inorganic powder, fundamentally solves the shortcomings of existing rounded corner materials, such as yellowing, brittleness, and lengthy processing procedures. Simultaneously, by introducing HDI trimer, an aliphatic compound, it avoids the yellowing effects caused by aromatic compounds, achieving a technological leap in high weather resistance, high toughness, non-yellowing, and paint-free construction, significantly improving the engineering adaptability and aesthetic value of polyurethane mortar skirting boards. The material prepared according to this invention is simple, easy to construct, and has stable performance. It can be widely used in skirting board construction in industrial plants, commercial spaces, medical clean rooms, and home decoration, demonstrating strong industrial practicality and extremely high application value. Any equivalent substitutions or modifications within the spirit and principles of this invention fall within the protection scope of this invention.

[0074] Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A water-based polyurethane mortar skirting board material, characterized in that, It comprises four components: A, B, C, and D. Component A is a mixture of polyol, water, and additives; component B is an aliphatic isocyanate curing agent; component C is a mixture of white cement, active powder, additives, and quartz sand; and component D is a mixture of color powder, polyol, and additives. By mass parts: component A: 9-20 parts; component B: 15-37 parts; component C: 40-90 parts; and component D: 1.5-5 parts.

2. The water-based polyurethane mortar skirting board material according to claim 1, characterized in that, The polyols in component A or component D include at least two of the following: castor oil, castor oil-modified polyol, hydrogenated castor oil, soybean oil-modified polyol, polypropylene oxide ether glycol, polytetrahydrofuran ether glycol, polycarbonate diol, polypentyl adipate neopentyl glycol, neopentyl glycol, and trimethylolpropane.

3. The water-based polyurethane mortar skirting board material according to claim 1, characterized in that, The raw materials in component A, by weight, are: 50-80 parts polyol, 20-45 parts water, and 1-5 parts additives; the raw materials in component C, by weight, are: 30-95 parts white cement, 2-20 parts active powder, 0-70 parts quartz sand, and 0.2-2 parts additives; the raw materials in component D, by weight, are: 30-60 parts color powder, 39-68 parts polyol, and 1-5 parts additives.

4. The water-based polyurethane mortar skirting board material according to claim 1, characterized in that, The additives described in any one of components A, C, or D include at least one of thixotropic additives, dispersants, water-reducing agents, defoamers, anti-settling agents, retarders, and catalysts.

5. The water-based polyurethane mortar skirting board material according to claim 1, characterized in that, The aliphatic isocyanate curing agent is hexamethylene diisocyanate trimer.

6. The water-based polyurethane mortar skirting board material according to any one of claims 1-5, characterized in that, The water-based polyurethane mortar skirting board material has a tensile strength of 1.5-1.7 MPa, an elongation at break of 0.2-0.4%, a 7-day flexural strength of 4-8 MPa, a Shore D hardness of 40-45, an operating temperature of 0-30℃, and an operating time of 18-25 min.

7. The preparation method of the water-based polyurethane mortar skirting board material according to claim 1, characterized in that, Includes the following steps: (1) Preparing component A: Mix the polyol, water and additives in component A evenly and stir until there are no particles; (2) Prepare component B; (3) Pre-fabrication of component C: Mix white cement, active powder and quartz sand in component C evenly; (4) Preparing component D: Mix the color powder, polyol and additives in component D evenly; (5) Mix the components A, B, C and D together and stir until homogeneous to obtain water-based polyurethane mortar skirting board material.

8. The preparation method according to claim 7, characterized in that, The stirring time in step (3) is 20-30 minutes.

9. The application of the water-based polyurethane mortar skirting board material according to any one of claims 1-5 in the construction of wall and floor joints under different working environments.

10. The application according to claim 9, characterized in that, The working environment includes door and window openings, areas exposed to direct sunlight, environments with long-term water exposure, basements, or cold storage facilities.

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