Epoxy floor coating added with modified rare earth and preparation method

Abstract

The invention discloses an epoxy floor coating added with modified rare earth and a preparation method, and belongs to the technical field of epoxy floor coatings. The invention discloses an epoxy floor coating. The epoxy floor finish paint comprises, by weight, 0.466 parts of epoxy floor finish paint, 0.28 parts of a curing agent, 0.014 parts of a filler and 0.24 parts of an organic solvent, and modified cerium dioxide is added on the basis of the epoxy floor finish paint and accounts for 1%-6% of the weight of the epoxy floor finish paint. The method has the advantages of improving the comprehensive performance of the coating, simplifying the production process and promoting environment-friendly and efficient production.

Description

Technical Field

[0001] The present application belongs to the technical field of epoxy floor coatings, and specifically relates to an epoxy floor coating with added modified rare earth and a preparation method thereof. Background Art

[0002] At present, epoxy floor coatings are used in many fields such as modern industrial plants, underground garages and commercial shopping centers. This type of coating can not only significantly improve the aesthetics of the floor, but also greatly enhance its wear resistance, compressive strength, waterproof performance and chemical corrosion resistance, thereby effectively extending the service life of the floor and reducing maintenance costs. Among them, epoxy floor coatings have become a mainstream product with high technical maturity and rapid development in the market due to its excellent adhesion, excellent physical and mechanical properties and good chemical stability. However, epoxy floor coatings on the market are often faced with the phenomenon of easy fading, weak scratch resistance and insufficient adhesion. The researchers conducted a series of studies for this purpose. In the patent (CN107488329A), by adding water-based graphene to epoxy resin, the bonding strength and corrosion resistance of the epoxy resin to the substrate were successfully enhanced. In the patent (CN112795142A), by adding carbon nanotubes to epoxy resin, the material is given excellent flame retardant, thermal conductivity and mechanical properties. In addition, the study found that the use of rare earth elements to modify the coating topcoat is one of the most effective methods. 2 O 3 In the paper "Application of Modified Epoxy Coatings in Paint Repair of High Voltage Switch Products", rare earth oxide Ce is added to epoxy resin coatings. 2 O 3 , and the results showed that the coating system was well combined with the substrate, which improved the corrosion resistance of the coating. In view of the insufficient performance of existing epoxy coatings, the present invention proposes a preparation method of adding modified rare earth elements to epoxy floor coatings, aiming to enhance the anti-fading ability of the coating, improve the adhesion to the substrate, and optimize its construction performance under different environmental conditions. Summary of the invention

[0003] The purpose of the present invention is to provide an epoxy floor coating with added modified rare earth and a preparation method, which improves the poor adhesion between the floor coating and the substrate and the fading ability of the floor coating.

[0004] The rare earth compound provided in the present invention is a modified cerium dioxide, which is an active agent and catalyst, and can further improve the activity of the coating reaction. The compound obtained by reacting with the resin has a very strong bond energy, so that the coating performance is further improved. Therefore, modified cerium dioxide is added to the epoxy floor topcoat to improve its anti-fading ability and adhesion to various substrates.

[0005] The epoxy floor coating of the present invention comprises the following components: 0.466 parts by weight of epoxy floor topcoat, 0.28 parts by weight of curing agent, 0.014 parts by weight of filler, 0.24 parts by weight of organic solvent, and on this basis, modified cerium dioxide is added, and its weight portion is 1%-6% of the weight of the epoxy floor topcoat.

[0006] Preferably, the particle size of cerium dioxide is 25-50nm; the organic solvent is an ester organic solvent and an aromatic hydrocarbon solvent; the ester organic solvent is n-butanol, and the aromatic hydrocarbon solvent is xylene; the mass ratio of the ester organic solvent to the aromatic hydrocarbon solvent is 1:(0.8-1.4); the filler is silicon dioxide; it should be noted that silicon dioxide acts as a dispersant.

[0007] The raw material components of the modified cerium dioxide of the present invention include: 0.27 parts by weight of cerium dioxide, 0.35 parts by weight of a silane coupling agent, 0.34 parts by weight of n-butanol, and 0.04 parts by weight of deionized water.

[0008] Preferably, the silane coupling agent is KH-560.

[0009] The preparation method of the modified cerium dioxide comprises the following steps:

[0010] (1) adding a silane coupling agent to an aqueous solution of n-butanol (n-butanol: water = 9:1), mechanically stirring for 150-180 minutes to hydrolyze the solution, and obtaining a mixed solution;

[0011] (2) adding cerium dioxide to the obtained mixed solution under stirring, and then stirring for 3-8 hours (preferably within a certain range, otherwise only one point is protected) to obtain a mixture;

[0012] (3) then centrifuging the obtained mixture, drying, and filtering to obtain modified cerium dioxide;

[0013] Preferably, in step (2), the stirring temperature is 30-80°C; in step (3), the drying temperature is 40-90°C, and the drying time is 12-18h;

[0014] The preparation method of the epoxy floor coating added with modified rare earth element material of the present invention comprises the following steps:

[0015] 1. Stir and heat the epoxy floor paint with a certain ratio of solvent (n-butanol: xylene = 7:5) at 80°C for 60-150 minutes to obtain a mixture A.

[0016] 2. Add 2-3 g of filler silica to the mixture A obtained in step 1, and disperse by ultrasonic for 90-120 min to obtain a mixture B;

[0017] 3. Add modified cerium dioxide to the mixture B obtained in step 2, and stir at 50-80° C. for 3-5 hours to obtain a mixture C;

[0018] 4. Add curing agent to mixture C obtained in step 3, stir evenly, and let stand for 8-12 hours (it is best to give a range, otherwise only one point will be protected) to obtain a floor coating with added modified rare earth materials.

[0019] Compared with existing floor coatings, this application has at least the following beneficial effects:

[0020] (1) The modified cerium dioxide material provided in this application, with the assistance of a specific coupling agent, can achieve excellent dispersibility and high compatibility with various organic resin matrices, laying a solid material foundation for improving the multi-faceted performance of epoxy floor coatings. By optimizing the dispersion state of the material, not only the uniformity and stability of the coating are enhanced, but also favorable conditions are created for the improvement of key indicators such as its weather resistance, hardness and aesthetics.

[0021] (2) The modified cerium dioxide material provided in this application adopts a simplified production process, which significantly shortens the manufacturing cycle and reduces the dependence on high-end production equipment. This efficient and economical production process is not only easy to connect with existing industrial production lines, but also shows extremely high scalability, paving a smooth road for the large-scale industrial application of this material, and heralding its broad application prospects in the coatings manufacturing industry.

[0022] (3) This application emphasizes the dual role of modified cerium dioxide as a high-performance activator and catalyst. It can not only effectively catalyze the chemical reaction during the curing process of the coating, accelerate the reaction rate, and improve the reaction efficiency, but also the chemical bonds formed after participating in the reaction are extremely stable, which directly enhances the physical properties and chemical stability of the coating. Therefore, the incorporation of this modified cerium dioxide into the epoxy floor topcoat formula is intended to significantly enhance the coating's resistance to UV fading and its ability to adhere to a variety of substrate surfaces, thereby broadening its scope of application in complex environments and harsh use conditions.

[0023] (4) In summary, the modified cerium dioxide material and its preparation method of the present invention, with its significant advantages in improving the comprehensive performance of coatings, simplifying the production process and promoting environmentally friendly and efficient production, have brought an important technological innovation to the epoxy floor coating industry, and are expected to promote the entire field to move towards higher standards and wider applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the adhesion test diagram of Example 2.

[0025] Figure 2 This is the hardness test diagram of Example 2.

[0026] Figure 3 This is the outdoor initial picture of Example 2, (a), (b), (c), (d), the cerium dioxide addition amounts are 0%, 1%, 3.5%, and 6%, respectively.

[0027] Figure 4 These are pictures of Example 2 left outdoors for 30 days, (a), (b), (c), (d), with cerium dioxide addition amounts of 0%, 1%, 3.5%, and 6%, respectively. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present invention.

[0029] The experimental methods in the following examples are conventional methods unless otherwise specified. The experimental materials used in the following examples are purchased from conventional stores unless otherwise specified.

[0030] The present invention provides a modified cerium dioxide, wherein the raw material components include: 0.27 parts by weight of cerium dioxide, 0.35 parts by weight of a silane coupling agent, 0.34 parts by weight of n-butanol, and 0.04 parts by weight of deionized water, wherein the silane coupling agent is KH-560;

[0031] The preparation method comprises the steps of:

[0032] S101: adding the silane coupling agent to an aqueous solution of n-butanol (n-butanol: water = 9:1), and mechanically stirring for 160 min to hydrolyze;

[0033] S102: adding cerium dioxide to the mixed solution obtained in S101 under stirring, and then stirring for 6 hours;

[0034] S103; then centrifuging, drying, and filtering the mixture obtained in S102 to obtain modified cerium dioxide;

[0035] In S102, the stirring temperature is 60°C;

[0036] In S103, the drying temperature is 60° C. and the drying time is 15 hours;

[0037] The present invention also provides an epoxy floor coating with added modified rare earth materials, wherein the components of the coating include: 0.466 parts by weight of epoxy floor topcoat, 0.28 parts by weight of curing agent, 0.014 parts by weight of silicon dioxide (filler), 0.14 parts by weight of n-butanol (ester organic solvent), 0.1 parts by weight of xylene (aromatic hydrocarbon solvent), and modified cerium dioxide (1%, 3.5%, and 6% of the weight of the epoxy floor topcoat).

[0038] The preparation method of the epoxy floor coating added with modified rare earth element material comprises the steps of:

[0039] S1: Stir and heat the epoxy floor topcoat with a certain ratio of solvent (n-butanol: xylene = 7:5) at 80°C for 120 minutes;

[0040] S2: Add filler silica to the mixture obtained in S1 and disperse by ultrasonic for 90-120 min;

[0041] S3: adding modified cerium dioxide to the mixture obtained in S2, and stirring at 80° C. for 3 h;

[0042] S4: Add a curing agent to the mixture obtained in S3, stir evenly, and let stand for 6 hours to obtain a floor coating with added modified rare earth materials.

[0043] Example 1

[0044] The present embodiment provides a modified cerium dioxide, characterized in that the raw material components of the modified cerium dioxide include: 0.27 parts by weight of cerium dioxide, 0.35 parts by weight of silane coupling agent KH-560, 0.34 parts by weight of n-butanol, and 0.04 parts by weight of deionized water.

[0045] The preparation method comprises the steps of:

[0046] S101: adding the silane coupling agent to an aqueous solution of n-butanol (n-butanol: water = 9:1), and mechanically stirring for 160 min to hydrolyze;

[0047] S102: adding cerium dioxide to the mixed solution obtained in S101 under stirring, and then stirring for 6 hours;

[0048] S103; then centrifuging, drying, and filtering the mixture obtained in S102 to obtain modified cerium dioxide;

[0049] Example 2

[0050] The present embodiment provides an epoxy floor coating added with modified rare earth element materials, wherein the components of the coating include: 0.466 parts by weight of epoxy floor topcoat, 0.28 parts by weight of curing agent, 0.014 parts by weight of silica (filler), 0.14 parts by weight of n-butanol (ester organic solvent), 0.1 parts by weight of xylene (aromatic hydrocarbon solvent), and modified cerium dioxide (1%, 3.5%, and 6% of the weight of the epoxy floor topcoat).

[0051] The preparation method of the epoxy floor coating added with modified rare earth element material comprises the steps of:

[0052] S1: Stir and heat the epoxy floor topcoat with a certain ratio of solvent (n-butanol: xylene = 7:5) at 80°C for 120 minutes;

[0053] S2: Add filler silica to the mixture obtained in S1 and disperse by ultrasonic for 120 min;

[0054] S3: Add modified cerium dioxide to the mixture obtained in S2 and stir at 80°C for 3h. In order to understand how the amount of modified cerium dioxide added affects the performance test of epoxy floor coatings, four variable groups are set up, namely, the amount of modified cerium dioxide added is 0%, 1%, 3.5%, and 6% of the epoxy floor topcoat, respectively.

[0055] S4: Add curing agent to the mixture obtained in S3, stir evenly, and let stand for 6 hours to obtain a floor coating with modified rare earth materials. Then evenly apply the obtained floor coating to the homemade cement bricks, and test the performance after the paint film is completely dry.

[0056] Test Section

[0057] The epoxy floor coating of Example 2 was tested for relevant properties, and the test method was as follows:

[0058] (1) Surface drying time: The surface drying time of epoxy floor coating is determined according to GB / T1728-1979 (1989) "Determination of drying time of paint film and putty film".

[0059] (2) Hardness: The hardness of epoxy floor coating is measured according to GB / T 6739-2006 "Paint and varnish pencil method for determination of film hardness".

[0060] (3) Adhesion: The adhesion of epoxy floor coating is measured according to GB / T 9286-1998 "Scratch test for paint and varnish films".

[0061] (4) Anti-fading: Place cement bricks coated with epoxy floor paint outdoors for 30 days, and take photos of each brick with different proportions of modified cerium dioxide material added.

[0062] Table 1 Performance test

[0063] project Technical indicators 0％ 1％ 3.5％ 6％ Status in the container No foreign matter or lumps have none none none Dry time GB / T1728–1979(1989) 4h 2h 3h 3.5h Pencil hardness GB / T 6739-2006 4H 6H 6H 5H Adhesion GB / T 9286-1998 Level 4 Level 0 Level 3 Level 2

[0064] In Example 2, the addition of cerium dioxide, a rare earth compound, has a significant positive effect on the performance of the epoxy floor coating. Specifically:

[0065] Shortened surface drying time: The addition of cerium dioxide resulted in a shorter surface drying time for epoxy floor coatings compared to samples without rare earth compounds added. This may be because the addition of cerium dioxide changes the volatility or reaction rate of the coating.

[0066] Improved hardness: Significant improvements are reflected in the hardness of the coating. The hardness of all samples with added cerium dioxide has reached more than 4H, especially when the addition amount is 1% and 3.5%, the hardness has reached 6H. This shows that cerium dioxide can effectively enhance the wear resistance and scratch resistance of the coating, which is an extremely beneficial feature for floors that need to withstand high loads for a long time.

[0067] Enhanced adhesion: The addition of cerium dioxide also improves the adhesion between the coating and the substrate, especially when the addition amount is 1%, the adhesion reaches the highest level 0, which means that an extremely strong bond is formed between the coating and the substrate, which can effectively prevent the coating from peeling or cracking and extend its service life.

[0068] Improved fading resistance: From a visual point of view, although there are differences in fading resistance at different addition amounts, especially the sample with 3.5% addition has relatively obvious fading, compared with the sample without cerium dioxide addition, the coating film with cerium dioxide addition has better fading resistance overall. In particular, the samples with 1% and 6% addition have no obvious fading, showing good color stability, which is particularly important for places that require long-term aesthetics.

[0069] In summary, the addition of an appropriate amount (especially 1%) of cerium dioxide can not only significantly improve the physical properties of epoxy floor coatings, such as hardness and adhesion, but also improve its fading resistance, although it is necessary to optimize the addition ratio to avoid possible negative fading effects at certain concentrations. Therefore, in practical applications, adjusting the addition ratio of cerium dioxide according to specific needs can prepare epoxy floor coatings with better comprehensive performance.

Claims

1. An epoxy floor coating with added modified rare earth, characterized in that: The components of the epoxy floor coating are: 0.466 parts by weight of epoxy floor topcoat, 0.28 parts by weight of curing agent, 0.014 parts by weight of filler, 0.24 parts by weight of organic solvent, and on this basis, modified cerium dioxide is added, and its weight portion is 1%-10% of the weight of the epoxy floor topcoat.

2. The epoxy floor coating added with modified rare earth according to claim 1, characterized in that: The particle size of the cerium dioxide is 25-50nm; the organic solvent is an ester organic solvent and an aromatic hydrocarbon solvent; the ester organic solvent is n-butanol, and the aromatic hydrocarbon solvent is xylene; the mass ratio of the ester organic solvent to the aromatic hydrocarbon solvent is 1:(0.8-1.4); the filler is silicon dioxide; and the silicon dioxide acts as a dispersant.

3. The epoxy floor coating added with modified rare earth according to claim 1, characterized in that: The raw material components of the modified cerium dioxide include: 0.27 parts by weight of cerium dioxide, 0.35 parts by weight of a silane coupling agent, 0.34 parts by weight of n-butanol, and 0.04 parts by weight of deionized water, wherein the silane coupling agent is KH-560.

4. The epoxy floor coating added with modified rare earth according to claim 1, characterized in that: The preparation steps of the modified cerium dioxide are as follows: (1) adding a silane coupling agent to an aqueous solution of n-butanol, wherein n-butanol: water = 9:1, and mechanically stirring for 120-180 minutes to hydrolyze the mixture to obtain a mixed solution; (2) adding cerium dioxide to the obtained mixed solution under stirring, and then stirring at a temperature of 30-80° C. for 3-8 hours; (3) The obtained mixture is centrifuged, dried, and filtered to obtain modified cerium dioxide; the drying temperature is 40-90° C., and the drying time is 12-18 hours.

5. A method for preparing the epoxy floor coating with added modified rare earth according to claim 1, characterized in that: Includes steps: 1) Stir and heat the epoxy floor paint with a certain ratio of solvent (n-butanol: xylene = 7:5) at 80°C for 60-150 minutes 2) adding 1-6 g of filler silicon dioxide to the mixture A obtained in step 1), and performing ultrasonic dispersion for 90-120 min to obtain a mixture B; 3) adding 1%-10% of modified cerium dioxide to the mixture B obtained in step 2) and stirring at 30-80° C. for 2-8 hours; 4) Add a curing agent to the mixture C obtained in step 3), stir evenly, and let stand for 6-15 hours to obtain a floor coating with modified rare earth materials added thereto.

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