Waterborne epoxy-based patching compound for shop floor or corner and its preparation method and use method

Abstract

The application discloses a water-based epoxy-based repairing material suitable for workshop ground or corner, which comprises a resin component, a curing component and an aggregate component; the resin component comprises a water-based epoxy emulsion, a wetting dispersing agent and water, the water-based epoxy emulsion is selected from EP380, the wetting dispersing agent is mainly composed of three raw materials with model numbers of HR-4003, RD-9001 and TY-6010 and is compounded according to a mass ratio of 6:3:1; and the curing component comprises a water-based epoxy curing agent and is selected from MH3150. The water-based epoxy-based repairing material has the advantages of convenient construction, strong flow leveling property, smooth surface after self-leveling hardening and high bonding strength, solves the defects that the existing repairing material is easy to fall off, has uneven surface after self-leveling hardening, needs to be leveled after repairing and is difficult to be leveled when repairing small pits or corners.

Description

Technical Field

[0001] This invention relates to the field of waterborne epoxy repair materials, specifically to a waterborne epoxy repair material suitable for workshop floors or corners, and the preparation and application of the repair material. Background Technology

[0002] The floors of production workshops are generally made of cement. After a period of use, pits and damage will appear. For example, the cement floors of machine workshops are prone to problems such as powdering, peeling, pitting and breaking after long-term use due to the great pressure and wear. The cement floors of chemical workshops inevitably have pits of various sizes due to the leakage of acidic, alkaline or other corrosive raw materials, which not only affect the appearance but also affect the use.

[0003] For the repair of cement floors, large-area repairs are uneconomical, but local repairs have many drawbacks due to the limitations of existing repair materials. Specifically, the repair materials currently available on the market are generally divided into two categories: cement mortar and ordinary water-based epoxy mortar. Cement mortar repair materials have the following drawbacks: (1) slow strength development, prolonging the repair construction period; (2) poor adhesion, causing easy detachment and peeling after repair. Ordinary water-based epoxy mortar repair materials also have the disadvantages of poor leveling properties, inconvenient construction, and the need for smoothing after repair. Tests show that the flowability of ordinary water-based epoxy mortar repair products on the market is 18.3-24.8 cm, resulting in an uneven surface after self-leveling and curing, making it difficult to smooth small pits or corners. Therefore, improving the performance of repair materials and developing new materials suitable for local floor repairs or corner repairs to simplify construction operations and optimize repair effects has significant practical value. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a water-based epoxy repair material that is easy to apply, has strong leveling properties, and high bonding strength. When used to repair the floor or corners of a production workshop, it can achieve a smooth surface without the need for troweling, simply by self-leveling and hardening. It is also resistant to peeling and is durable.

[0005] To achieve the above objectives, the present invention provides a water-based epoxy repair material suitable for workshop floors or corners, comprising a resin component, a curing component, and an aggregate component;

[0006] The resin components include an aqueous epoxy emulsion, a wetting and dispersing agent, and water. The aqueous epoxy emulsion is model EP380, and the wetting and dispersing agent is mainly composed of three raw materials, model HR-4003, RD-9001, and TY-6010, in a mass ratio of 6:3:1.

[0007] The curing component includes a water-based epoxy curing agent, specifically model MH3150.

[0008] As a limitation of the above technical solution, the aggregate components include cement and river sand, wherein the cement is selected as PC 425 composite silicate cement and the river sand is selected as 70-120 mesh.

[0009] The repair material of this invention is an optimization based on water-based epoxy mortar. By selecting three wetting and dispersing agents for synergistic effect, a high leveling effect is achieved. At the same time, it is compounded with a specific water-based epoxy emulsion to form a resin component that can significantly improve fluidity and bonding strength. Then, it is compounded with curing components and aggregate components to solve the shortcomings of existing repair materials, such as easy falling off, uneven surface after self-leveling and hardening, the need for smoothing after repair, and difficulty in smoothing small pits or corners. This invention not only has a simple construction process, but also has a faster overall strength of the material after construction, which can effectively shorten the construction cycle.

[0010] As a limitation of the above technical solution, the water-based epoxy repair material suitable for workshop floors or corners includes the following raw materials in parts by weight:

[0011]

[0012] Further improve the formulation of water-based epoxy repair materials, optimize repair performance, and facilitate construction operations.

[0013] As a limitation of the above technical solution, the resin component, curing component and aggregate component of the water-based epoxy repair material are packaged and stored separately, and each component is thoroughly mixed and applied according to the formula during construction.

[0014] As a limitation of the above technical solution, the fluidity of the water-based epoxy repair material reaches 28.7 cm.

[0015] The water-based epoxy repair material of the present invention requires that the resin component, curing component and aggregate component be packaged separately during storage and mixed during construction. Its fluidity meets the requirement that a smooth repair surface can be obtained by self-leveling hardening alone, which can eliminate the need for smearing operation. It has significant advantages in terms of repair performance and ease of operation.

[0016] Meanwhile, the present invention also provides a method for using water-based epoxy repair material suitable for workshop floors or corners as described above. That is, during construction, the resin component and the curing agent component are thoroughly mixed evenly, and then the aggregate component is added to the mixture in proportion. After mixing evenly, it is poured evenly onto the pits or corners that need to be repaired, and then allowed to self-level and harden to obtain a smooth floor. It is then cured in an environment with a temperature of 21-25°C and a relative humidity of 60-80%.

[0017] As a limitation of the above technical solution, the water-based epoxy repair material, after construction and curing, has a compressive strength of 11.31 MPa after 1 day and 24.9 MPa after 3 days.

[0018] The water-based epoxy-based repair material of this invention is convenient to apply. During construction, simply mix all components thoroughly and pour the mixture onto the area to be repaired. After self-leveling and hardening, no smoothing is required. After curing, it can significantly improve the compressive strength of the repaired area, making the 1-day and 3-day compressive strength indicators far exceed those of normal repair materials. The high compressive strength can effectively protect the repaired area and avoid the current problem that the repaired area is easily damaged again during later use due to its lower strength compared to other normal parts, requiring repeated repairs.

[0019] In summary, the water-based epoxy repair material of the present invention, suitable for workshop floors or corners, is formulated with a specific type of water-based epoxy emulsion and three specific wetting and dispersing agents to form a resin component. This resin component, combined with the curing and aggregate components, significantly improves flowability, bonding strength, and ease of application. It overcomes the shortcomings of existing repair materials, such as easy detachment, uneven surface after self-leveling and hardening, the need for smoothing after repair, and difficulty in smoothing small pits or corners. When using the repair material of the present invention for localized damage repair, especially for workshop floors or corners, the construction process is simple and the material strengthens quickly after application, effectively shortening the construction cycle. Attached Figure Description

[0020] Figure 1 Photographs showing the longitudinal flowability of the repair material in Example 1;

[0021] Figure 2 1. Photograph of the lateral flowability of the repair material in Example 1;

[0022] Figure 3 Example 1: Flatness photograph of the repair material after self-leveling;

[0023] Figure 4 Example 1: Photograph of the repair material after self-leveling and hardening;

[0024] Figure 5 Photos of the unrepaired construction site;

[0025] Figure 6 Example 1: Photograph showing the effect of applying the repair material directly to the repair area during construction;

[0026] Figure 7 Comparative Example 1: Photograph of the longitudinal flowability of the repair material;

[0027] Figure 8 Comparative Example 1: Photograph of the lateral flowability of the repair material;

[0028] Figure 9 Comparative Example 1: Photograph of the smoothness of the repair material after self-leveling;

[0029] Figure 10Comparative Example 1: Photograph of the repair material after self-leveling and hardening;

[0030] Figure 11 Photos of the unrepaired construction site;

[0031] Figure 12 Comparative Example 1: A photo showing the effect of applying repair material directly to the repair area during construction;

[0032] Figure 13 Comparative Example 1: Photograph showing the effect of smoothing the repair material with tools during construction. Detailed Implementation

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] The raw materials used in the following examples and comparative examples are described below:

[0035] Waterborne epoxy emulsion EP380, purchased from Changsha Xindehang Chemical Co., Ltd.

[0036] Wetting and dispersing agent HR-4003 was purchased from Dongguan Hongrui Chemical Co., Ltd.

[0037] Wetting and dispersing agent RD-9001 was purchased from Qingdao Shengshi New Materials Co., Ltd.

[0038] Wetting and dispersing agent TY-6010, purchased from Jining Tangyi Chemical Co., Ltd.

[0039] Water-based epoxy curing agent MH3150, purchased from Changsha Xindehang Chemical Co., Ltd.

[0040] The other raw materials are all typical products purchased from the market.

[0041] Example 1

[0042] A water-based epoxy resin repair compound, with the following formula:

[0043]

[0044] The above components consist of: first, waterborne epoxy emulsion EP380 is mixed with deionized water and dispersed by high-speed stirring at 1000 r / min for 10 min; during the stirring process, HR-4003 is added and stirred for 5 min; then RD-9001 is added and stirred for 5 min; finally, TY-6010 is added and stirred for 5 min to form the resin component; waterborne epoxy curing agent MH3150 forms the curing component; and 425 cement and 70-120 mesh cement are mixed evenly to form the aggregate component; the three components are packaged and stored separately.

[0045] During construction, thoroughly mix all components and pour evenly onto the potholes or damaged corners that need repair. The longitudinal and transverse flowability of the repair material are as follows: Figure 1 , 2 As shown, the material flows uniformly in both the horizontal and vertical directions, exhibiting good fluidity with a flow rate of 28.7 cm. After self-leveling and hardening, a smooth surface is obtained. Figure 3 The smoothness of the repair material after self-leveling is shown. Obviously, the material can be completely self-leveled during construction without the need for additional construction methods. Figure 4 This is the effect after hardening. The repair material was tested using standard specimens prepared according to GB / T17671-2021 "Test Method for Strength of Cement Mortar (ISO Method)" at a specific temperature.

[0046] After curing at 21-25℃ and 60-80% relative humidity, the compressive strength was tested and found to be 11.31 MPa after 1 day and 24.9 MPa after 3 days, which fully meets the requirements for forklift operation on the ground. Figure 5 When the construction site has not been repaired, Figure 6 After the repair material is mixed evenly according to the formula and mixing order, it is poured directly onto the repair area. Obviously, the material can level itself over the entire area that needs repair.

[0047] Example 2

[0048] A water-based epoxy resin repair compound, with the following formula:

[0049]

[0050] The advantage of this formula is that the overall fluidity of the material is far superior to that of ordinary epoxy mortar repair materials, enabling self-leveling construction, but the fluidity is slightly lower than that of Example 1.

[0051] Example 3

[0052] This embodiment illustrates the effect of different ratios of three wetting and dispersing agents on flowability.

[0053] According to the dosage ratios in the table below, the ratios of the three wetting and dispersing agents are shown in Table 1. After the wetting and dispersing agents are properly compounded, add water-based epoxy emulsion and water to form the resin component. After compounding the curing component and aggregate component, test the flowability of the entire material and the 1-day compressive strength of the specimen. The flowability of the repair material is tested according to the grouting material flowability test method, and the specific operation steps are as follows:

[0054] 1. Place the glass plate on the lab bench and adjust it to be level;

[0055] 2. Wipe the glass plate and the truncated cone mold with a damp cloth, and cover them with a damp cloth;

[0056] 3. Mix the materials thoroughly according to the specified proportions and mixing method, and pour the mixture into the prepared truncated cone mold up to the top edge. Wipe the glass plate again with a damp cloth, and lift the truncated cone mold vertically to allow the material to flow naturally until it stops. Then measure the length in the maximum and minimum directions; the average value is the material's flowability.

[0057]

[0058] Analysis of the data in the table above shows that:

[0059] Using a single dispersant cannot achieve satisfactory flowability, and combining two dispersants does not significantly improve flowability. However, combining three dispersants will produce a synergistic dispersion effect, allowing the repair material to achieve the required flowability for self-leveling repair under specific ratios. The three dispersants, whether used individually or in combination, have little impact on compressive strength.

[0060] Comparative Example 1

[0061] The flowability of a common epoxy repair mortar was tested below. The epoxy repair mortar to be tested consists of the following components:

[0062] Component A (curing agent): 100g MH-6612;

[0063] Component B (epoxy resin): 128g epoxy resin E-51 + 501g reactive diluent 692 + 3g polycarboxylate superplasticizer + 5g ethylene glycol + 1g defoamer + 2g hydrophilic silica + 150g water;

[0064] Component C (aggregate): 890g ordinary Portland cement + 1780g 70-120 mesh river sand.

[0065] The fluidity of the epoxy repair mortar was measured to be 24.8 cm. Figure 7 , Figure 8 The longitudinal and lateral flow rates are shown. Figure 9 This is a photo showing the smoothness after self-leveling. The condition after the material hardens will be shown in the image. Figure 10 As shown, Figure 11These are photos of the construction site before construction began. Figure 12 The photo shows the state of the repair mortar after it has been mixed evenly and poured onto the construction site. Figure 13 This photo shows the state of the repair mortar being smoothed using tools.

[0066] As can be seen from the pictures, ordinary epoxy repair mortar has poor fluidity, requires manual smoothing after construction, and the flatness is difficult to control.

[0067] Meanwhile, the compressive strength of the formula was tested, and the 1-day compressive strength was 9.20 MPa. Compared with the invention, the data is lower.

[0068] Comparative Example 2

[0069] A water-based epoxy resin repair compound, with the following formula:

[0070]

[0071] The formulation of this waterborne epoxy repair material is basically the same as that of the repair material formulation in Example 1, but the composition of the wetting and dispersing agent is different. After experimentation, it was found that the flowability of this repair material is 26.1 cm, which is significantly lower than that of the repair material of the present invention. The self-leveling effect is not good, and the 1-day compressive strength is 10.08 MPa, which is low. It can be seen that not all wetting and dispersing agents can produce a synergistic effect, and the required flowability for self-leveling can not be achieved after synergy.

[0072] In summary, the water-based epoxy repair material of the present invention has strong leveling properties, high bonding strength, and convenient construction. During construction, it is only necessary to mix all the components thoroughly and pour them onto the area to be repaired. After self-leveling and hardening, no smoothing treatment is required. After curing, it can significantly improve the compressive strength of the repair area and is not easy to fall off or peel off.

Claims

1. A water-based epoxy resin repair compound suitable for workshop floors or corners, characterized in that: The water-based epoxy repair material includes a resin component, a curing component, and an aggregate component; The resin components include an aqueous epoxy emulsion, a wetting and dispersing agent, and water. The aqueous epoxy emulsion is model EP380, and the wetting and dispersing agent is mainly composed of three raw materials, model HR-4003, RD-9001, and TY-6010, in a mass ratio of 6:3:

1. The curing component includes a water-based epoxy curing agent, specifically model MH3150. The aggregate components include cement and river sand. The cement is PC 42.5 composite silicate cement, and the river sand is 70-120 mesh. The water-based epoxy repair material comprises the following raw materials in parts by weight: Waterborne epoxy emulsion EP380 80~120 Wetting and dispersing agent HR-4003 0.1~0.7 Wetting and dispersing agent RD-9001 0.1~0.4 Wetting and dispersing agent TY-6010 0.1~0.6 Deionized water 90~120 Water-based epoxy curing agent MH3150 23~27 PC 42.5 cement 300~330 70-120 mesh river sand, 600-700 mesh; The water-based epoxy repair material has a flowability of 28.7 cm. After curing at 21~25℃ and 60~80% relative humidity, the water-based epoxy repair material has a 1-day compressive strength of 11.31 MPa and a 3-day compressive strength of 24.9 MPa.

2. The water-based epoxy repair compound suitable for workshop floors or corners according to claim 1, characterized in that: The water-based epoxy repair material contains resin components, curing components, and aggregate components that are stored separately. During construction, each component is thoroughly mixed and applied according to the formula.

3. The method of using water-based epoxy repair compound suitable for workshop floors or corners as described in claim 1 or 2, characterized in that: During construction, the resin component and the curing agent component are thoroughly mixed evenly. Then, the aggregate component is added to the mixture according to the ratio. After mixing evenly, it is poured evenly onto the pits or damaged corners that need to be repaired. Wait for it to self-level and harden to obtain a smooth surface. Cure it in an environment with a temperature of 21~25℃ and a relative humidity of 60~80%.

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