An epoxy floor paint and a method for preparing the same

Abstract

The application discloses an epoxy resin floor paint and a preparation method thereof, and comprises the following raw materials in parts by weight: component A: epoxy resin 100-120 parts, active diluent 15-20 parts, modified quartz sand 40-50 parts, barium sulfate 30-40 parts, dispersing agent 2-3 parts, and leveling agent 0.5-0.8 parts; component B: diamino dicyclohexyl methane 30-35 parts, and defoaming agent 0.2-0.3 parts. The epoxy resin floor paint is prepared by using specific contents of epoxy resin, active diluent, diamino dicyclohexyl methane curing agent and specific additives, and introducing quartz sand modified by multi-step surface functionalization as a filler, and the components synergistically act, effectively overcoming the problems of the existing epoxy floor paint, such as insufficient mechanical properties (such as impact resistance), poor wear resistance and peeling caused by the decrease of adhesion after long-term use, significantly improving the comprehensive performance of the floor paint, prolonging the service life and widening the application range.

Description

Technical Field

[0001] This invention belongs to the field of floor coating technology, specifically relating to an epoxy resin floor coating and its preparation method. Background Technology

[0002] Epoxy floor coatings were first invented in Germany. They are made by mixing different substances and are mainly used in various workshops, factories, and other working environments to achieve environmental protection and reduce dust. The type of floor coating varies depending on the environment in which it is used. Common types include epoxy resin floor coatings, wear-resistant floor coatings, anti-static floor coatings, and corrosion-resistant floor coatings. Among them, epoxy resin floor coatings are a high-strength, wear-resistant, and aesthetically pleasing type. The main characteristics of epoxy resin paint are high adhesion to cement substrates, excellent physical properties of the coating film, and resistance to water and corrosion. It is suitable for various factories, warehouses, parking lots, repair shops, shopping mall floors, etc., and has a very wide range of applications and is inexpensive.

[0003] Currently, floor coatings are being used more and more widely, but most floor coatings on the market still have some problems, such as poor impact resistance, poor abrasion resistance, and insufficient adhesion, which easily leads to problems such as blistering, peeling, cracking, flaking, or flaking after prolonged use. Current improvements to floor coatings often target their abrasion resistance or impact resistance to ensure they are not worn away, and they also possess good mechanical properties such as toughness and tensile strength to meet performance requirements. Alternatively, improvements may be made to the application process to enhance the adhesion between the floor coating and the substrate, but this significantly increases the requirements for floor coating application.

[0004] Chinese patent application CN110240852A discloses a composite nano-TiO2 and ZnO waterborne epoxy floor coating and its preparation method, belonging to the field of chemical coatings. This technical solution includes four components: A, B1, B2, and B3. Component A includes nano-TiO2, nano-ZnO, a silane coupling agent, and deionized water. Component B1 includes a defoamer, a dispersant, and a leveling agent. Component B2 includes a waterborne epoxy resin, a film-forming aid, and an active diluent. Component B3 is a curing agent. The composite nano-TiO2 and ZnO waterborne epoxy floor coating of this invention not only has high hardness but also good waterproofing and acid / alkali corrosion resistance, showing promising application prospects. Chinese patent application CN103627309A discloses a waterborne epoxy resin floor coating, belonging to the field of chemical materials technology. This water-based epoxy resin floor coating contains a topcoat and a primer. Based on 100 parts by weight of the topcoat, it contains 73-80 parts by weight of polyurethane and 20-27 parts by weight of water-based additive B. Water-based additive B contains 5-8 parts by weight of dispersant, 2-3 parts by weight of preservative, 5-8 parts by weight of feel agent, and 5-8 parts by weight of wetting agent. The primer contains component A and an epoxy resin curing agent, with a mass ratio of component A to epoxy resin curing agent of 1:2.5. Based on 100 parts by weight of component A, it contains 60-75 parts by weight of epoxy resin, 2-3 parts by weight of pigment, 18-21 parts by weight of filler, and 1-20 parts by weight of water-based additive A. Water-based additive A contains dispersant, preservative, feel agent, and wetting agent. This water-based epoxy resin floor coating overcomes the problem of poor anti-slip properties in existing floor coatings. The aforementioned patents have improved some of the problems currently faced by epoxy resin coatings, such as poor mechanical properties and poor anti-slip properties. However, they cannot effectively solve the problems of poor mechanical properties, low wear resistance, and reduced adhesion after long-term use of epoxy resin floor paint, which greatly restricts its large-scale commercial application.

[0005] Therefore, this field seeks to develop an epoxy resin floor coating that is wear-resistant, has good mechanical properties, and has high long-term adhesion, thereby broadening the application areas of epoxy resin floor coatings. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide an epoxy resin floor coating and its preparation method.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An epoxy resin floor coating, by weight, comprises the following raw materials:

[0009] Component A: 100-120 parts epoxy resin, 15-20 parts reactive diluent, 40-50 parts modified quartz sand, 30-40 parts barium sulfate, 2-3 parts dispersant, and 0.5-0.8 parts leveling agent;

[0010] Component B: 30-35 parts of diaminodicyclohexylmethane, 0.2-0.3 parts of defoamer.

[0011] Preferably, an epoxy resin floor coating comprises, by weight, the following raw materials:

[0012] Component A: 100-110 parts epoxy resin, 15-18 parts reactive diluent, 45-50 parts modified quartz sand, 30-35 parts barium sulfate, 2.5-3 parts dispersant, and 0.6-0.8 parts leveling agent;

[0013] Component B: 30-33 parts of diaminodicyclohexylmethane, 0.25-0.3 parts of defoamer.

[0014] Preferably, the epoxy value of the epoxy resin is 210-230 g / eq, and the reactive diluent is one or more of butyl glycidyl ether, tert-butylphenyl glycidyl ether, or propylene oxide butyl ether.

[0015] Preferably, the dispersant is one or more of BYK111, BYK161, and BYK180, the leveling agent is one or two of BYK358N and BYK361N, and the defoamer is a polyether-modified silicone defoamer.

[0016] Preferably, the method for preparing the modified quartz sand includes the following steps:

[0017] S1. Add quartz sand to sodium hydroxide solution for impregnation treatment. After treatment, filter, wash and dry to obtain pretreated quartz sand.

[0018] S2. Add the pretreated quartz sand from step S1 to an aqueous ethanol solution, then add vinyltriethoxysilane, stir and react. After the reaction is complete, filter, wash and dry to obtain ethylene quartz sand.

[0019] S3. Add the ethylene silica sand from step S2 to toluene, then add diallyl-terminated polyether, 3,4-diaminobenzenethiol, and azobisisobutyronitrile, and heat the mixture to react. After the reaction is complete, filter, wash, and dry to obtain modified silica sand.

[0020] Preferably, the mass concentration of the sodium hydroxide solution in step S1 is 3-5%, the immersion treatment temperature is 30-40℃, and the time is 1-2 hours.

[0021] In this invention, modified silica sand is used as the base material. Its main component is silicon dioxide (SiO2), an inorganic filler with high hardness, stable chemical properties, and low cost, commonly used as wear-resistant aggregate. However, its surface is inorganic and polar, resulting in poor compatibility and weak interfacial bonding with organic and relatively non-polar epoxy resins. The silica sand surface is gently etched and activated with an alkaline solution to expose and generate more active hydroxyl groups.

[0022] Preferably, in step S2, the volume ratio of ethanol to water in the aqueous ethanol solution is 3:1, the mass ratio of the pretreated quartz sand to vinyltriethoxysilane is 70-80:6-9, the temperature of the stirring reaction is 60-70℃, and the time is 2-3h.

[0023] In this invention, silane coupling agents are used to modify quartz sand, which improves the dispersibility of quartz sand on the one hand, and introduces reactive groups—vinyl groups—on the quartz sand on the other hand.

[0024] Preferably, in step S3, the mass ratio of ethylene silica sand, diallyl-terminated polyether, and azobisisobutyronitrile is 70-80:15-21:5-8:0.2-0.3, and the heating reaction temperature is 70-80℃ for 2-3 hours.

[0025] In this invention, two different organic segments are introduced into the quartz sand through free radical reaction / thiol-ene reaction: flexible polyether chains and groups with active amino groups. The polyether segments in the dielyl-terminated polyether are flexible, introducing "buffers" between the rigid inorganic filler and the relatively rigid epoxy resin matrix. These flexible links help absorb and dissipate impact energy, alleviate stress concentration, and thus improve the toughness and impact resistance of the floor coating. 3,4-Diaminobenzenethiol contains two amino groups and can undergo ring-opening addition reactions with the epoxy groups in the epoxy resin to form strong covalent bonds, which are much stronger than those in the unmodified form. The physical adsorption forces (van der Waals forces, hydrogen bonds, etc.) between the quartz sand and resin, and the strong interfacial bonding force, can effectively prevent the penetration and accumulation of moisture or other media at the interface, thereby fundamentally improving the long-term adhesion of the floor coating and effectively inhibiting problems such as blistering, delamination, peeling, or flaking that occur after long-term use. At the same time, the benzene ring in 3,4-diaminobenzenethiol is a rigid planar structure. This rigid structure helps to transfer stress to the high-hardness quartz sand filler. It reduces the energy dissipation or deformation loss of stress at the interface, allowing the quartz sand to better assume the role of the "skeleton" to resist wear, thereby improving the wear resistance of the floor coating.

[0026] This invention also protects a method for preparing an epoxy resin floor coating as described above, comprising the following steps:

[0027] Weigh the raw materials according to the formula, mix the epoxy resin, dispersant, and reactive diluent evenly, then add modified quartz sand and barium sulfate, stir at high speed, add leveling agent, and stir at medium speed for 15-25 minutes to obtain component A; mix diaminodicyclohexylmethane and defoamer evenly under medium speed stirring to obtain component B; mix component A and component B, stir evenly to obtain the epoxy resin floor paint.

[0028] Preferably, the high-speed stirring speed is 1500-1700 r / min and the time is 30-40 min; the medium-speed stirring speed is 600-800 r / min and the time is 10-20 min.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The epoxy resin floor paint provided by the present invention uses epoxy resin, reactive diluent, diaminodicyclohexylmethane curing agent and specific types of additives with a specific content, and introduces quartz sand modified by multiple steps of surface functionalization as filler. The components work together to effectively overcome the problems of insufficient mechanical properties (such as impact resistance), poor wear resistance and peeling caused by decreased adhesion after long-term use in the existing epoxy floor paint. It significantly improves the comprehensive performance of the floor paint, extends its service life and broadens its application range.

[0031] (2) The epoxy resin floor paint provided by this invention incorporates modified quartz sand, which is first activated by alkali treatment, then grafted with vinyl silane, and finally co-grafted onto the quartz sand surface using a free radical initiation / sulfur-ene reaction. This results in the quartz sand surface having amino groups capable of participating in the epoxy curing reaction, forming chemical bonds (covalent bonds) between the filler and the epoxy resin matrix during the curing process. This greatly enhances the interfacial bonding strength between the two, which is key to improving the long-term adhesion of the coating. Simultaneously, the allyl-terminated polyether contains... Organic flexible segments help absorb and dissipate impact energy and alleviate stress concentration, thereby improving the toughness and impact resistance of the floor coating. The synergistic effect of the two functional small molecules effectively prevents coating blistering, cracking, and peeling caused by interface failure, ensuring a durable and stable bond between the floor coating and the substrate. At the same time, the chemical bonds formed between the 3,4-diaminobenzenethiol on the modified quartz sand and the epoxy resin firmly "anchor" the quartz sand to the epoxy resin matrix. During wear, the quartz sand particles are not easily detached, and can fully utilize their high hardness to resist wear, thereby improving the wear resistance of the epoxy resin floor coating.

[0032] (3) The epoxy resin floor paint provided by the present invention not only enhances the interfacial interaction by forming chemical bonds between the surface-grafted amino groups and the epoxy resin, but also the grafted flexible polyether segments may play a certain role in toughening and stress buffering in the interfacial area. At the same time, the selection of specific high-efficiency dispersants ensures the uniform dispersion of modified quartz sand and barium sulfate in the epoxy resin matrix, avoiding stress concentration points caused by filler agglomeration. These factors work together to make the cured paint film have better wear resistance and mechanical properties (such as hardness, compressive strength and possible impact toughness), improve the comprehensive performance of epoxy resin floor paint, and better resist wear and impact caused by walking and vehicle rolling. Detailed Implementation

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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] Unless otherwise specified, all chemical reagents and materials in this invention are purchased from the market or synthesized from raw materials purchased from the market.

[0035] In this invention, the epoxy resin is epoxy resin E44; the quartz sand has a particle size of 200-325 mesh; the barium sulfate has a particle size of 200-325 mesh; the diallyl-terminated polyether is purchased from Liaoning Kelong Fine Chemical Co., Ltd., with the product name KLF-X and an average molecular weight of 300-1200; and the polyether-modified silicone defoamer is Evonik Tego Foamex 842.

[0036] Example 1

[0037] An epoxy resin floor coating, by weight, comprises the following raw materials:

[0038] Component A: 110 parts epoxy resin, 18 parts butyl glycidyl ether, 45 parts modified quartz sand, 35 parts barium sulfate, 2.5 parts dispersant BYK111, and 0.7 parts leveling agent BYK358N;

[0039] Component B: 32 parts of diaminodicyclohexylmethane and 0.25 parts of polyether-modified silicone defoamer.

[0040] The method for preparing the modified quartz sand includes the following steps:

[0041] S1. Add quartz sand to a 4% sodium hydroxide solution and impregnate it at 35°C for 1.5 hours. After the treatment is completed, filter, wash and dry to obtain pretreated quartz sand.

[0042] S2. Add 75g of pretreated quartz sand from step S1 to 1L of ethanol aqueous solution (ethanol to water volume ratio of 3:1), then add 8g of vinyltriethoxysilane, stir and react at 65℃ for 2.5h, filter, wash and dry after the reaction is complete to obtain ethylene quartz sand.

[0043] S3. Add 75g of ethylene silica sand from step S2 to toluene, then add 18g of diallyl-terminated polyether, 7g of 3,4-diaminobenzenethiol, and 0.25g of azobisisobutyronitrile. React at 75°C for 2.5h. After the reaction is complete, filter, wash, and dry to obtain modified silica sand.

[0044] A method for preparing an epoxy resin floor coating includes the following steps:

[0045] Weigh the raw materials according to the formula, mix the epoxy resin, dispersant BYK111, and butyl glycidyl ether evenly, then add modified quartz sand and barium sulfate, and stir at high speed of 1600 r / min for 35 min. Then add leveling agent BYK358N and stir at medium speed of 700 r / min for 20 min to obtain component A. Mix diaminodicyclohexylmethane and polyether modified silicone defoamer at medium speed of 700 r / min for 15 min until evenly mixed to obtain component B. Mix component A and component B and stir evenly to obtain the epoxy resin floor paint.

[0046] Example 2

[0047] An epoxy resin floor coating, by weight, comprises the following raw materials:

[0048] Component A: 100 parts epoxy resin, 15 parts propylene oxide butyl ether, 40 parts modified quartz sand, 30 parts barium sulfate, 2 parts dispersant BYK161, and 0.5 parts leveling agent BYK361N;

[0049] Component B: 30 parts of diaminodicyclohexylmethane and 0.2 parts of polyether-modified silicone defoamer.

[0050] The method for preparing the modified quartz sand includes the following steps:

[0051] S1. Add quartz sand to a 3% sodium hydroxide solution and impregnate it at 30°C for 2 hours. After the treatment is completed, filter, wash and dry to obtain pretreated quartz sand.

[0052] S2. Add 70g of pretreated quartz sand from step S1 to 1L of ethanol aqueous solution (ethanol to water volume ratio of 3:1), then add 6g of vinyltriethoxysilane, stir and react at 60℃ for 3h, filter, wash and dry after the reaction is complete to obtain ethylene quartz sand.

[0053] S3. Add 70g of ethylene silica sand from step S2 to toluene, then add 15g of dielyl-terminated polyether, 5g of 3,4-diaminobenzenethiol, and 0.2g of azobisisobutyronitrile. React at 70℃ for 3h. After the reaction is complete, filter, wash, and dry to obtain modified silica sand.

[0054] A method for preparing an epoxy resin floor coating includes the following steps:

[0055] Weigh the raw materials according to the formula, mix the epoxy resin, dispersant BYK161, and propylene oxide butyl ether evenly, then add modified quartz sand and barium sulfate, and stir at high speed of 1500 r / min for 40 min. Then add leveling agent BYK361N and stir at medium speed of 600 r / min for 25 min to obtain component A. Mix diaminodicyclohexylmethane and polyether modified silicone defoamer at medium speed of 600 r / min for 20 min until evenly mixed to obtain component B. Mix component A and component B and stir evenly to obtain the epoxy resin floor paint.

[0056] Example 3

[0057] An epoxy resin floor coating, by weight, comprises the following raw materials:

[0058] Component A: 120 parts epoxy resin, 20 parts tert-butylphenyl glycidyl ether, 50 parts modified quartz sand, 40 parts barium sulfate, 3 parts dispersant BYK180, and 0.8 parts leveling agent BYK358N;

[0059] Component B: 35 parts of diaminodicyclohexylmethane and 0.3 parts of polyether-modified silicone defoamer.

[0060] The method for preparing the modified quartz sand includes the following steps:

[0061] S1. Add quartz sand to a 5% sodium hydroxide solution and impregnate it at 40°C for 1 hour. After the treatment is completed, filter, wash and dry to obtain pretreated quartz sand.

[0062] S2. Add 80g of pretreated quartz sand from step S1 to 1L of ethanol aqueous solution (ethanol to water volume ratio of 3:1), then add 9g of vinyltriethoxysilane, stir and react at 70℃ for 2h, filter, wash and dry after the reaction is complete to obtain ethylene quartz sand.

[0063] S3. Add 80g of ethylene silica sand from step S2 to toluene, then add 21g of diallyl-terminated polyether, 8g of 3,4-diaminobenzenethiol, and 0.3g of azobisisobutyronitrile. React at 80℃ for 2 hours. After the reaction is complete, filter, wash, and dry to obtain modified silica sand.

[0064] A method for preparing an epoxy resin floor coating includes the following steps:

[0065] Weigh the raw materials according to the formula, mix the epoxy resin, dispersant BYK180, and tert-butylphenyl glycidyl ether evenly, then add modified quartz sand and barium sulfate, and stir at high speed at 1700 r / min for 30 min. Then add leveling agent BYK358N and stir at medium speed at 800 r / min for 15 min to obtain component A. Mix diaminodicyclohexylmethane and polyether-modified silicone defoamer at medium speed at 800 r / min for 10 min until evenly mixed to obtain component B. Mix component A and component B and stir evenly to obtain the epoxy resin floor paint.

[0066] Comparative Example 1

[0067] An epoxy resin floor coating, by weight, comprises the following raw materials:

[0068] Component A: 110 parts epoxy resin, 18 parts butyl glycidyl ether, 45 parts modified quartz sand, 35 parts barium sulfate, 2.5 parts dispersant BYK111, and 0.7 parts leveling agent BYK358N;

[0069] Component B: 32 parts of diaminodicyclohexylmethane and 0.25 parts of polyether-modified silicone defoamer.

[0070] The method for preparing the modified quartz sand includes the following steps:

[0071] S1. Add quartz sand to a 4% sodium hydroxide solution and impregnate it at 35°C for 1.5 hours. After the treatment is completed, filter, wash and dry to obtain pretreated quartz sand.

[0072] S2. Add 75g of pretreated quartz sand from step S1 to 1L of ethanol aqueous solution (ethanol to water volume ratio of 3:1), then add 8g of vinyltriethoxysilane, stir and react at 65℃ for 2.5h, filter, wash and dry after the reaction is complete to obtain ethylene quartz sand.

[0073] S3. Add 75g of ethylene silica sand from step S2 to toluene, then add 18g of diallyl-terminated polyether and 0.25g of azobisisobutyronitrile, and react at 75°C for 2.5h. After the reaction is complete, filter, wash and dry to obtain modified silica sand.

[0074] A method for preparing an epoxy resin floor coating includes the following steps:

[0075] Weigh the raw materials according to the formula, mix the epoxy resin, dispersant BYK111, and butyl glycidyl ether evenly, then add modified quartz sand and barium sulfate, and stir at high speed of 1600 r / min for 35 min. Then add leveling agent BYK358N and stir at medium speed of 700 r / min for 20 min to obtain component A. Mix diaminodicyclohexylmethane and polyether modified silicone defoamer at medium speed of 700 r / min for 15 min until evenly mixed to obtain component B. Mix component A and component B and stir evenly to obtain the epoxy resin floor paint.

[0076] Compared with Example 1, this comparative example did not introduce 3,4-diaminobenzyl mercaptan into the modified quartz sand.

[0077] Comparative Example 2

[0078] An epoxy resin floor coating, by weight, comprises the following raw materials:

[0079] Component A: 110 parts epoxy resin, 18 parts butyl glycidyl ether, 45 parts modified quartz sand, 35 parts barium sulfate, 2.5 parts dispersant BYK111, and 0.7 parts leveling agent BYK358N;

[0080] Component B: 32 parts of diaminodicyclohexylmethane and 0.25 parts of polyether-modified silicone defoamer.

[0081] The method for preparing the modified quartz sand includes the following steps:

[0082] S1. Add quartz sand to a 4% sodium hydroxide solution and impregnate it at 35°C for 1.5 hours. After the treatment is completed, filter, wash and dry to obtain pretreated quartz sand.

[0083] S2. Add 75g of pretreated quartz sand from step S1 to 1L of ethanol aqueous solution (ethanol to water volume ratio of 3:1), then add 8g of vinyltriethoxysilane, stir and react at 65℃ for 2.5h, filter, wash and dry after the reaction is complete to obtain ethylene quartz sand.

[0084] S3. Add 75g of ethylene silica sand from step S2 to toluene, then add 7g of 3,4-diaminobenzenethiol and 0.25g of azobisisobutyronitrile, and react at 75℃ for 2.5h. After the reaction is complete, filter, wash and dry to obtain modified silica sand.

[0085] A method for preparing an epoxy resin floor coating includes the following steps:

[0086] Weigh the raw materials according to the formula, mix the epoxy resin, dispersant BYK111, and butyl glycidyl ether evenly, then add modified quartz sand and barium sulfate, and stir at high speed of 1600 r / min for 35 min. Then add leveling agent BYK358N and stir at medium speed of 700 r / min for 20 min to obtain component A. Mix diaminodicyclohexylmethane and polyether modified silicone defoamer at medium speed of 700 r / min for 15 min until evenly mixed to obtain component B. Mix component A and component B and stir evenly to obtain the epoxy resin floor paint.

[0087] Compared to Example 1, this comparative example did not introduce diallyl-terminated polyethers onto the modified quartz sand.

[0088] Comparative Example 3

[0089] An epoxy resin floor coating, by weight, comprises the following raw materials:

[0090] Component A: 110 parts epoxy resin, 18 parts butyl glycidyl ether, 45 parts modified quartz sand, 35 parts barium sulfate, 2.5 parts dispersant BYK111, and 0.7 parts leveling agent BYK358N;

[0091] Component B: 32 parts of diaminodicyclohexylmethane and 0.25 parts of polyether-modified silicone defoamer.

[0092] The method for preparing the modified quartz sand includes the following steps:

[0093] S1. Add quartz sand to a 4% sodium hydroxide solution and impregnate it at 35°C for 1.5 hours. After the treatment is completed, filter, wash and dry to obtain pretreated quartz sand.

[0094] S2. Add 75g of pretreated quartz sand from step S1 to 1L of ethanol aqueous solution (ethanol to water volume ratio of 3:1), then add 8g of vinyltriethoxysilane, stir and react at 65℃ for 2.5h, filter, wash and dry after the reaction is complete to obtain modified quartz sand.

[0095] A method for preparing an epoxy resin floor coating includes the following steps:

[0096] Weigh the raw materials according to the formula, mix the epoxy resin, dispersant BYK111, and butyl glycidyl ether evenly, then add modified quartz sand and barium sulfate, and stir at high speed of 1600 r / min for 35 min. Then add leveling agent BYK358N and stir at medium speed of 700 r / min for 20 min to obtain component A. Mix diaminodicyclohexylmethane and polyether modified silicone defoamer at medium speed of 700 r / min for 15 min until evenly mixed to obtain component B. Mix component A and component B and stir evenly to obtain the epoxy resin floor paint.

[0097] Compared to Example 1, this comparative example did not introduce diallyl-terminated polyether and 3,4-diaminobenzenethiol onto the modified quartz sand.

[0098] The epoxy resin floor coatings prepared in Examples 1-3 and Comparative Examples 1-3 were applied to a 15mm×20mm steel plate, cured at room temperature, and demolded to obtain test samples. Compressive strength was tested according to GB / T50589-2010 "Technical Specification for Epoxy Resin Self-Leveling Flooring Engineering". Impact strength was tested according to GB / T 1732-2020 "Test Method for Impact Resistance of Paint Films". Before testing, the dry sample plate coated with the paint film was placed in an environment of 23℃ and 50% relative humidity for 20 hours. The sample plate was made of tinplate. Abrasion resistance was tested according to GB / T 1768-2006 "Determination of Abrasion Resistance of Paints and Varnishes - Rotating Rubber Grinding Wheel Method", using a CS-17 wheel at a 1kg load and 1000 revolutions. Adhesion was tested according to GB / T The adhesion was tested according to 5210-2006 "Adhesion Test of Paint and Varnish by Pull-Off Method". The substrate was a steel plate and the coating thickness was 200μm. The adhesion retention rate was calculated by placing the steel plate coated with 200μm thick epoxy resin floor paint in water at 50℃ for 720h and then testing the adhesion again. The ratio of the adhesion retention rate to the initial adhesion was calculated. The test results are shown in Table 1 below.

[0099] Table 1

[0100]

[0101] As can be seen from Table 1 above, the epoxy resin floor coating prepared by this invention has good compressive strength and impact resistance, as well as good wear resistance and long-term adhesion retention.

[0102] The above description is a further detailed explanation of the present invention in conjunction with specific implementation examples. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the protection scope of the present invention.

[0103] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An epoxy resin floor paint, characterized by, By weight parts, including the following raw materials: Component A: epoxy resin 100-120 parts, active diluent 15-20 parts, modified quartz sand 40-50 parts, barium sulfate 30-40 parts, dispersant 2-3 parts, leveling agent 0.5-0.8 parts; Component B: diamino dicyclohexyl methane 30-35 parts, defoaming agent 0.2-0.3 parts; Among them, the epoxy value of the epoxy resin is 210-230 g / eq, the active diluent is one or several of butyl glycidyl ether, tert-butyl phenyl glycidyl ether, propylene oxide butyl ether; The dispersant is one or several of BYK111, BYK161, BYK180, the leveling agent is one or two of BYK358N, BYK361N, and the defoaming agent is polyether modified silicone defoaming agent; The preparation method of the modified quartz sand comprises the following steps: S1, the quartz sand is added to the sodium hydroxide solution for immersion treatment to obtain pretreated quartz sand; S2, the pretreated quartz sand is added to an ethanol aqueous solution, then vinyltriethoxysilane is added, and stirring reaction is carried out to obtain vinylated quartz sand; S3, the vinylated quartz sand is added to toluene, then bisallyl-terminated polyether, 3,4-diaminobenzenethiol and azobisisobutyronitrile are added, and heating reaction is carried out to obtain modified quartz sand.

2. The epoxy floor paint according to claim 1, characterized in that, By weight parts, including the following raw materials: Component A: epoxy resin 100-110 parts, active diluent 15-18 parts, modified quartz sand 45-50 parts, barium sulfate 30-35 parts, dispersant 2.5-3 parts, leveling agent 0.6-0.8 parts; Component B: diamino dicyclohexyl methane 30-33 parts, defoaming agent 0.25-0.3 parts.

3. The epoxy floor paint according to claim 1, characterized in that, The mass concentration of the sodium hydroxide solution in step S1 is 3-5%, the temperature of the immersion treatment is 30-40℃, and the time is 1-2h.

4. The epoxy floor paint according to claim 1, characterized in that, In step S2, the volume ratio of ethanol to water in the ethanol aqueous solution is 3:1, the mass ratio of the pretreated quartz sand to vinyltriethoxysilane is 70-80:6-9, the temperature of the stirring reaction is 60-70℃, and the time is 2-3h.

5. The epoxy floor paint according to claim 1, wherein In step S3, the mass ratio of the vinylated quartz sand to bisallyl-terminated polyether to azobisisobutyronitrile is 70-80:15-21:5-8:0.2-0.3, the temperature of the heating reaction is 70-80℃, and the time is 2-3h.

6. A process for the preparation of an epoxy resin floor paint according to any one of claims 1 to 5, characterized in that The following steps are included: The raw materials are weighed according to the formula, the epoxy resin, the dispersant and the active diluent are mixed uniformly, then the modified quartz sand and the barium sulfate are added, after high-speed stirring, the leveling agent is added, and medium-speed stirring is carried out for 15-25min to obtain component A; diamino dicyclohexyl methane and defoaming agent are mixed uniformly under medium-speed stirring to obtain component B; component A and component B are mixed and stirred uniformly to obtain the epoxy resin floor paint.

7. The preparation method according to claim 6, characterized in that, The speed of the high-speed stirring is 1500-1700r / min, and the time is 30-40min; the speed of the medium-speed stirring is 600-800r / min, and the time is 10-20min.

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