Epoxy resin paint and preparation method thereof

Abstract

The invention provides an epoxy resin paint and a preparation method thereof, wherein the raw materials for preparing the epoxy resin paint include an epoxy resin component and a curing agent component, and the weight ratio of the epoxy resin component and the curing agent component is (3-5): 1; the raw materials for preparing the above-mentioned epoxy resin component include by weight: 100-110 parts of epoxy resin, 0-10 parts of diluent, 20-100 parts of heavy calcium, 5-15 parts of precipitated barium sulfate, 1-5 parts of expandable microspheres, 0-2 parts of titanium dioxide, 0.05-1 parts of dispersant, 0.05-1 parts of defoamer, 0.5-2 parts of anti-settling agent, and 0.05-1 parts of leveling agent; the raw materials for preparing the above-mentioned curing agent component include by weight: 100-110 parts of phenolic amine and 20-50 parts of polyaspartic acid ester. The epoxy resin paint of the present invention can be used for thermal spraying construction through the synergistic effect of each component, and has good heat insulation and thermal insulation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, in particular to an epoxy resin paint. The present invention also relates to a preparation method of the epoxy resin paint. Background Art

[0002] Floor paint is mainly made of resin, filler, pigment, solvent and other different substances through many production processes such as mixing, dissolving and dispersing. It can be divided into decorative floor paint, heavy anti-corrosion floor paint, heavy load resistant floor paint, etc. It has the characteristics of bright, real, beautiful, wear-resistant, waterproof and anti-corrosion. Among them, epoxy floor paint has been widely used due to its good water solubility and environmental protection.

[0003] Epoxy floor paint is a high-strength, wear-resistant and beautiful floor with the advantages of seamless, solid texture, good chemical resistance, anti-corrosion, dustproof, easy maintenance and low maintenance cost. Various solutions can be designed according to different application requirements, such as thin layer coating, 1-5mm thick self-leveling floor, anti-slip and wear-resistant coating, mortar type coating, anti-static, anti-corrosion coating, etc. It is suitable for various venues, such as: factory buildings, machine rooms, warehouses, laboratories, wards, operating rooms, workshops, etc.

[0004] Epoxy resin has the advantages of low shrinkage after curing, excellent mechanical properties, strong adhesion to cement substrate, good corrosion resistance and anti-penetration to water, medium and strong acids, alkalis and other solvents. It is widely used for floor decoration in clean workshops such as electronic appliances, food, and medicine. However, its thermal insulation performance is not ideal enough. The commonly used method is to add hollow glass microspheres, sepiolite and other inorganic fillers to the formula. However, inorganic hollow fillers cannot be sprayed, and their thermal conductivity is still high, so the thermal insulation effect is not ideal. Summary of the invention

[0005] The invention provides an epoxy resin paint which can be used for thermal spraying construction and has good heat insulation effect.

[0006] An epoxy resin paint, wherein the raw materials for preparing the epoxy resin paint include an epoxy resin component and a curing agent component, wherein the weight ratio of the epoxy resin component to the curing agent component is (3-5):1; the raw materials for preparing the epoxy resin component include, by weight, 100-110 parts of epoxy resin, 0-10 parts of diluent, 30-100 parts of heavy calcium, 5-15 parts of precipitated barium sulfate, 1-5 parts of expandable microspheres, 0.05-1 parts of dispersant, 0.05-1 parts of defoamer, 0.5-2 parts of anti-settling agent, 0.05-1 parts of leveling agent, and 0-2 parts of titanium dioxide; the raw materials for preparing the curing agent component include, by weight, 100-110 parts of phenolic amine and 20-50 parts of polyaspartic acid ester.

[0007] By adopting the technical scheme of the present invention, the curing agent group reacts with the epoxy resin component to cross-link and cure; the diluent can reduce the viscosity of the curing system and increase the fluidity; the defoaming agent can reduce the surface tension of the epoxy resin paint and reduce the formation of foam; the anti-settling agent makes the epoxy resin paint thixotropic and improves its storage stability; the leveling agent can reduce the surface tension of the coating liquid and improve its leveling and uniformity; the expandable microspheres reduce the thermal conductivity of the paint film and improve the thermal insulation effect of the floor paint. At the same time, it has a certain covering power and reduces the use of titanium dioxide.

[0008] Furthermore, the diluent is a reactive diluent.

[0009] Furthermore, the heavy calcium carbonate has a mesh size of 325-3000 mesh, and / or the precipitated barium sulfate has a mesh size of 325-5000 mesh.

[0010] Furthermore, the defoaming agent is a silicone defoaming agent.

[0011] Furthermore, the anti-settling agent includes at least one of polyamide-modified hydrogenated castor oil, polyurea, polyamide, and organic bentonite.

[0012] Furthermore, the raw materials for preparing the epoxy resin component also include 0.5-2 parts of iron oxide pigment.

[0013] Furthermore, the titanium dioxide is a rutile titanium dioxide with a mesh size of 325-3000 mesh, and the iron oxide pigment has a mesh size of 325-700 mesh.

[0014] Furthermore, the leveling agent includes at least one of an organic silicon rheological additive and an acrylic rheological additive.

[0015] Furthermore, the average particle size of the expandable microspheres is 10-30 um.

[0016] The invention also provides a method for preparing epoxy resin paint, and an epoxy resin component and a curing agent component are obtained respectively; wherein the epoxy resin component is prepared by the following method: epoxy resin, diluent, dispersant, defoamer and leveling agent are mixed, and the mixture is dispersed uniformly by stirring to obtain a mixed solution; expandable microspheres, heavy calcium, precipitated barium sulfate, titanium dioxide and an anti-settling agent are added to the mixed solution, and the mixture is dispersed by stirring and grinding to obtain the epoxy resin component; and the curing agent component is compounded by phenolic amine and polyaspartic acid ester. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0018] 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 biochemical reagent stores unless otherwise specified. In addition, except for special instructions in this example, the terms and processes involved in this example are understood according to the general knowledge and conventional methods in the prior art.

[0019] The invention discloses an epoxy resin paint. The raw materials for preparing the epoxy resin paint include an epoxy resin component and a curing agent component. The weight ratio of the epoxy resin component to the curing agent component is (3-5):1. The raw materials for preparing the epoxy resin component include, by weight, 100-110 parts of epoxy resin, 0-10 parts of diluent, 30-100 parts of heavy calcium, 5-15 parts of precipitated barium sulfate, 1-5 parts of expandable microspheres, 0.05-1 parts of dispersant, 0.05-1 parts of defoamer, 0.5-2 parts of anti-settling agent, 0.05-1 parts of leveling agent, and 0-2 parts of titanium dioxide. The raw materials for preparing the curing agent component include, by weight, 100-110 parts of phenolic amine and 20-50 parts of polyaspartic acid ester.

[0020] By adopting the technical scheme of the present invention, the curing agent component reacts with the epoxy resin component to cross-link and solidify; the diluent can reduce the viscosity of the curing system and increase the fluidity; the defoaming agent can reduce the surface tension of the epoxy resin paint and reduce the formation of foam; the anti-settling agent makes the epoxy resin paint thixotropic and improves its storage stability; the leveling agent can reduce the surface tension of the coating liquid and improve its leveling and uniformity; the expandable microspheres reduce the thermal conductivity of the paint film and improve the thermal insulation effect of the floor paint, while having a certain base surface covering power and reducing the use of titanium dioxide.

[0021] Specifically, the epoxy resin molecule of the epoxy resin paint of the present invention contains at least two reactive epoxy groups. The linear epoxy resin molecule opens the epoxy group under the action of the curing agent, and is bonded and cross-linked with other chemical bonds to form a relatively stable body molecule with a three-dimensional network structure and solidified. Usually, the curing of epoxy resin is divided into three stages, operation time, entering curing, and final curing. The operation time (also known as the working time or service life) is a part of the curing time. After mixing, the resin / curing agent mixture is still liquid and can work and is suitable for application. In order to ensure reliable bonding, all construction and positioning work should be done within the curing operation time. Entering the curing stage, the mixture begins to enter the curing phase (also known as the aging stage), and it begins to gel. At this stage, it cannot be disturbed. It will become a soft gel like hard rubber. Because the mixture is only partially cured at this time, the newly used epoxy resin can still be chemically linked with the old epoxy resin, so the untreated surface can still be bonded or reacted, but the bonding is reduced. In the final curing stage, the epoxy mixture reaches the stage of curing and becoming a solid, and can be further sanded and shaped. At this point, the epoxy resin has about 90% of its final reaction strength, so the fixing clamp can be removed and left at room temperature for several days to continue curing. At this point, the newly used epoxy resin cannot chemically link with the cured epoxy resin, so the epoxy surface must be properly pretreated, such as polished, to obtain good mechanical strength of the bond. The epoxy resin of the present invention is preferably a bisphenol A epoxy resin such as E51, E44, or a bisphenol F epoxy resin such as F44.

[0022] The diluent of the epoxy resin paint of the present invention is used in combination with the base resin, which can reduce the viscosity of the curing system, increase fluidity, extend the service life, facilitate large-area construction, and improve operability. Epoxy resin diluents include active diluents and inactive diluents. Inactive diluents do not contain epoxy groups and cannot participate in the curing reaction. Alcohols (such as alcohol), esters (such as ethyl acetate, dibutyl phthalate), ketones (such as acetone), solvent gasoline, toluene, etc. can all be used as inactive diluents for epoxy resins. Inactive diluents added to epoxy resins generally reduce the curing crosslinking density, the epoxy resin curing time will slow down, and the temperature resistance and strength after curing will be reduced. The active diluent contains an epoxy group in the middle, which can participate in the curing reaction and form a three-dimensional crosslinked structure. There are also many kinds of active diluents, including monofunctional, difunctional, trifunctional, and multifunctional (four or more functional) active diluents. The epoxy resin paint of the present invention can choose whether to add a diluent according to the specific spraying equipment and the base material. If a diluent is added, an active diluent is preferably used, and specific diluents include BGE (butyl glycidyl ether), AGE (carbon 12-14 alkyl glycidyl ether), 622 (1,4-butanediol glycidyl ether), 636 (trimethylolpropane glycidyl ether), 692 (benzyl glycidyl ether), etc.

[0023] Heavy calcium is a commonly used powdered inorganic filler, which mainly plays a filling role and has the advantages of high chemical purity, high inertness, not easy chemical reaction, good thermal stability, no decomposition below 400°C, high whiteness, low oil absorption, low refractive index, soft, dry, no crystal water, low hardness, small abrasion value, non-toxic, tasteless, odorless, good dispersibility, etc. It can make the coating more delicate and uniform, with high whiteness, and can improve the strength, water resistance and dryness of the paint film, and at the same time, it has a certain covering function. The epoxy resin paint of the present invention preferably has a heavy calcium carbonate with a mesh size of 325-3000 mesh.

[0024] Precipitated barium sulfate is a white precipitate generated by the reaction of barium ions and sulfate ions in a solution. It is stable in nature and almost insoluble in water, ethanol and acid, but soluble in hot sulfuric acid. It is often used as a raw material or filler for paints, coatings, inks, plastics, rubber and batteries. Precipitated barium sulfate has a very high reflectivity in a wide spectrum, so it looks like a white powder and is color neutral. Most pigments are prone to form agglomerates, which will weaken the coloring power of the pigment. The use of precipitated barium sulfate will significantly and effectively reduce the flocculation problem in the preparation of various pigments, increase steric hindrance or charge repulsion to stabilize the pigment, and improve its cost-effectiveness. It can also effectively reduce the use of various pigments and play a role in replacing pigments, including titanium dioxide, color pigments and carbon black. Precipitated barium sulfate has good dispersibility, so the paint with precipitated barium sulfate has high gloss and rheological properties even at higher concentrations. Precipitated barium sulfate has a strong light reflection ability in the ultraviolet wavelength range. When titanium dioxide is added to the paint, precipitated barium sulfate can cooperate with TiO2 and has good sun resistance and weather resistance. At the same time, the coating with precipitated barium sulfate has better interlayer adhesion and coating hardness. The precipitated barium sulfate of the present invention preferably has a mesh size of 325-5000 mesh.

[0025] Expandable microspheres are thermoplastic hollow polymer microspheres, consisting of a thermoplastic polymer shell and an enclosed liquid alkane gas. When heated, the gas pressure in the shell increases and the thermoplastic shell softens, causing the volume of the expanded microspheres to increase significantly. When cooled, the shell of the expanded microspheres hardens again and the volume is fixed. The slightly expanded microspheres can be heated again for secondary expansion. After full expansion, the diameter and volume of the expanded microspheres will change. The polymer shell formula of the expanded microspheres is precisely designed to have a very low air permeability, which can effectively prevent the microspheres from leaking gas into the matrix, but the same type of expanded microspheres have different air tightness. The inflatable closed-cell structure is not only beneficial for electrical insulation, but also for thermal insulation. The thermal insulation effect is better than that of glass microspheres. At the same time, expandable microspheres are soft materials and can be used for spraying construction. Expandable microspheres combined with thermal spraying construction can also increase the curing rate and shorten the curing time.

[0026] In addition to the effect of heat insulation, expandable microspheres can also cover the base surface, which can reduce the amount of titanium dioxide used. Titanium dioxide pigments and fillers have high thermal conductivity. Reducing the amount of titanium dioxide can further improve the thermal insulation effect. This is because there is organic gas in the expandable microspheres, and the spherical material is different from the epoxy resin. The refractive index of the expandable microspheres, the microsphere wall, and the epoxy resin are different. When light passes through the three, it produces multiple refractions and scattering. Therefore, it can cover the base surface, thereby reducing the use of titanium dioxide, or even replacing titanium dioxide.

[0027] The epoxy resin paint of the present invention preferably uses expandable microspheres with an average particle size of 10-30 μm at room temperature, and commercially available microspheres such as Polychem's 120DU15, 120DU25, Jieheng JH96D, etc. can also be used.

[0028] The dispersant of the epoxy resin paint of the present invention is a surfactant having two opposite properties, lipophilicity and hydrophilicity, in the molecule. It can uniformly disperse the solid and liquid particles of inorganic and organic pigments that are difficult to dissolve in liquids, reduce the time and energy required to complete the dispersion process, and also prevent the sedimentation and coagulation of particles, stabilize the dispersed pigment dispersion, modify the surface properties of pigment particles, adjust the mobility of pigment particles, and form a stable suspension. The dispersant of the epoxy resin paint of the present invention can be selected from commercially available powders such as BYK111, BYK164, BASF EfkaFA4608AN, Dow Corning DC-51, Silok7465N, Silok7045, Sandingjia SDJ8012, etc.

[0029] Usually, during the processing of epoxy resin paint, stirring brings in air, which is easy to produce foam, and bubbles are generated during the curing process, so the epoxy resin paint of the present invention adds a defoamer. The defoamer is easy to spread on the surface of the solution, automatically spreads on the surface of the foam, and takes away a layer of solution adjacent to the surface, so that the liquid film is locally thinned, reaches a critical thickness, the liquid film breaks, and the foam is destroyed. The faster the defoamer spreads on the surface of the solution, the thinner the liquid film becomes, the foam destruction speed is accelerated, and the defoaming effect is strengthened. Therefore, the reason for defoaming is that it is easy to spread, and the adsorbed defoamer molecules replace the foaming agent molecules to form a film with poor strength. At the same time, part of the solution of the adjacent surface layer is taken away during the spreading process, so that the foam liquid film is thinned, the stability of the foam is reduced, and it is easy to destroy.

[0030] The defoamer of the present invention may preferably be an organosilicon defoamer. The organosilicon defoamer has three functions of breaking foam, degassing and suppressing foam, and has good chemical stability: Since the Si-O bond is relatively stable, the chemical stability of silicone oil is very high, and it is difficult to react chemically with other substances. Therefore, as long as the formulation is reasonable, the organosilicon defoamer is allowed to be used in systems containing acids, alkalis, and salts. The organosilicon defoamer can not only effectively break the foam that has been generated, but also significantly suppress the foam and prevent the formation of foam. The organosilicon defoamer of the present invention can be selected from the commercially available Deqian 6800, Evonik Tego900, Okawa H1131, Dow Corning AFE7610, Dow DF103, Tiande DJ1356, Nanhui CI120, etc.

[0031] The anti-settling agent of the epoxy resin paint of the present invention can prevent the filler or pigment from agglomerating, prevent the filler or pigment from settling to the bottom, and make the coating thixotropic, and greatly improve the viscosity. The preferred anti-settling agent of the epoxy resin paint of the present invention is at least one of polyamide-modified hydrogenated castor oil, polyurea, polyamide, and organic bentonite. Among them, the storage stability of hydrogenated castor oil after amide modification is good, and it has good coating performance and anti-sagging ability, and long-term storage has no obvious effect on the gloss of the coating film. The N-methylpyrrolidone solution (BYK-410) of modified polyurea is a rheological additive suitable for solvent-based and solvent-free coatings, and this additive works by "dilution" with solvents or liquid resins. BYK-410 is selectively incompatible with the coating system, and at a suitable stirring speed, it produces fine, needle-shaped crystals, and forms a three-dimensional network structure through the bonding force between the crystals, thereby providing a strong thixotropy for the system, and also providing excellent anti-settling and anti-sagging performance.

[0032] Polyamide is mostly made by emulsifying fatty acid amide in natural paraffin to generate polarity, and then putting it into xylene for pre-swelling to form a paste-like thixotropic agent. Its swelling structure is a network, with very good strength and heat resistance, good storage stability, and excellent anti-settling effect in the coating system, which can improve the thixotropy of the coating. Organic bentonite is made from natural montmorillonite, mainly hectorite, and reacts with onium salts (such as quaternary ammonium salts). In terms of coatings, organic bentonite is generally used as an anti-settling agent and thickener. Its mechanism of preventing precipitation is to change the rheological properties of the system to make it thixotropic, thereby preventing pigment sedimentation.

[0033] The anti-settling agent of the present invention can be selected from commercially available ones such as Arkema's MT, LV, Deqian 908, Qingtian DH6900, Desbaron 6900-2X, Nuoyi NY-200, etc.

[0034] The leveling agent of the present invention migrates to the surface of the paint film through limited compatibility, affects the surface properties of the paint film such as the interfacial tension, and enables the paint film to obtain good leveling. According to the different chemical structures of the leveling agent, there are three main categories commonly used: acrylic, silicone and fluorocarbon compounds. The leveling agent of the present invention is preferably at least one of silicone rheological additives and acrylic rheological additives. When acrylic rheological additives are selected, commercially available polyacrylates such as BYK333, BYK354, Qingtian DH3170, and silicone-modified polyacrylates containing hydroxyl functional groups such as BYK3700 can be used as surface flow control agents. When silicone rheological additives are selected, commercially available polyether-modified polydimethylsiloxanes such as Sandingjia SDJ3007 and polyester-modified polyorganosiloxanes such as Siloke 313 can be used. The compatibility of polyether- and polyester-modified silicones with resins has been greatly improved, and the surface tension can be reduced. The ability to control surface flow, the ability to increase slip, and the effects of anti-shrinkage and anti-adhesion are also very good. However, polyether-modified polysiloxanes have poor thermal stability.

[0035] Titanium dioxide can be added to epoxy resin paint to act as a white pigment and cover. Titanium dioxide has high thermal conductivity. If the amount is high, it will affect the thermal insulation performance. Therefore, the addition of expandable microspheres can reduce the amount of titanium dioxide used. The reduction in the amount of titanium dioxide used further improves the thermal insulation effect. The epoxy resin paint of the present invention can also include 0.5-2 parts of iron oxide pigment. Iron oxide pigment is non-toxic, does not bleed, has low cost, and can form a variety of different tones. Titanium dioxide is preferably a rutile titanium dioxide with a mesh size of 325-3000 mesh, and the mesh size of the iron oxide pigment is preferably 325-700 mesh.

[0036] The curing agent component of the epoxy resin paint of the present invention is compounded with phenolic amine and polyaspartic acid ester. The phenolic amine curing agent is an epoxy curing agent obtained by the Mannich condensation reaction of alicyclic amines with phenol, formaldehyde, etc. and then modified. It is a light yellow viscous liquid with a relative density of 0.90-1.10, a viscosity of 2500-5000mPa·s at 25°C, an amine value of 460-600mgKOH / g, and is non-toxic. Because the molecular structure contains phenolic hydroxyl groups, primary amine groups and secondary amine groups, it has the characteristics of high reactivity and fast curing speed, can be cured in low temperature and humid environments, and the physical and mechanical properties of the cured product are excellent. Phenolic amines such as T31, SF-PAA466, SF-PAA4531S, and EX-9525 can be preferred.

[0037] Polyaspartic acid ester is a curing agent containing multiple amino groups on a macromolecule, which can increase the crosslinking density of the cured product and improve the compressive strength of the epoxy coating. Since the addition of the expandable microspheres of the present invention will lead to a decrease in the mechanical properties of the coating, that is, a decrease in the compressive properties. Therefore, a certain amount of multifunctional polyaspartic acid ester curing agent can make up for the deficiency of the mechanical properties of the coating caused by the expandable microspheres. Polyaspartic acid esters can preferably be such as Desmophen NH1420, Desmophen NH1220, Desmophen XP7068, Desmophen XP7161, etc.

[0038] The present invention also provides a method for preparing epoxy resin paint, which can be specifically obtained by the following method: adding epoxy resin, active diluent, dispersant, defoamer, and leveling agent into a high-speed dispersing mixer, rotating at a speed of 1500-2000r / min, dispersing for 5-10min until uniform, to obtain a mixed solution; adding expandable microspheres, heavy calcium, precipitated barium sulfate, titanium dioxide, and anti-settling agent into the mixed solution, and continuing to disperse for 30-60min until uniform; after the dispersion is completed, the paint is transferred to a sand mill for dispersion and grinding for 10-30min to obtain the epoxy resin component. Obtaining the curing agent component: uniformly mixing phenolic amine and polyaspartic acid ester to obtain the curing agent component.

[0039] When using, mix the epoxy resin component and the curing agent component in a weight ratio of (3-5):1, add them to a heatable sprayer, set the sprayer temperature to 60-100°C, and then spray. If you need to increase the thickness of the paint film, you can spray multiple times.

[0040] The specific implementation scheme of the present invention is described in detail below.

[0041] Embodiment 1

[0042] The weight ratio of epoxy resin component to curing agent component is 3.5:1.

[0043] The epoxy resin component includes the following materials: 100 parts of epoxy resin E51, 5 parts of diluent BGE, 30 parts of heavy calcium (1250 mesh), 5 parts of precipitated barium sulfate (1250 mesh), 0 parts of titanium dioxide (1250 mesh), 1 part of expandable microspheres 120DU15, 0.5 parts of iron oxide green (400 mesh), 0.05 parts of dispersant BYK111, 0.05 parts of defoaming agent Deqian 6800, 0.5 parts of anti-settling agent Deqian 908, and 0.05 parts of leveling agent BYK354.

[0044] The curing agent component includes: 100 parts of phenalkamine T31 and 20 parts of polyaspartic acid ester Desmophen NH1420.

[0045] The preparation method of the epoxy resin component is as follows:

[0046] (1) Add epoxy resin E51, dispersant BYK111, defoamer Deqian 6800, and leveling agent BYK354 into a high-speed disperser at a speed of 1500 r / min for 5 minutes;

[0047] (2) Add titanium dioxide, iron oxide pigment and expandable microspheres into a high-speed disperser at a speed of 1500 r / min and continue to disperse for 30 minutes;

[0048] (3) Add heavy calcium, precipitated barium sulfate, and anti-precipitation agent and continue to disperse for 30 minutes;

[0049] (4) After dispersion, transfer the paint to a sand mill and grind for 10 minutes.

[0050] The construction method of the epoxy resin paint is as follows:

[0051] Mix the epoxy resin component and the curing agent component in proportion and add them to a heated sprayer. Set the sprayer temperature to 60°C and then spray. If you need to increase the thickness of the paint film, you can spray multiple times.

[0052] Embodiment 2

[0053] The weight ratio of the epoxy resin component to the curing agent component is 4:1.

[0054] The epoxy resin component includes the following materials: 100 parts of epoxy resin E51, 10 parts of diluent AGE, 80 parts of heavy calcium (3000 mesh), 20 parts of precipitated barium sulfate (3000 mesh), 1 part of titanium dioxide (3000 mesh), 1.5 parts of iron oxide blue 600 mesh, 2 parts of expandable microspheres, 0.5 parts of dispersant BYK111, 0.5 parts of defoaming agent Okawa H1131, 1 part of anti-settling agent MT, and 0.5 parts of leveling agent BYK333.

[0055] The curing agent component is 100 parts of phenolic amine T31 and 50 parts of polyaspartic acid ester Desmophen NH1420.

[0056] The preparation method of the epoxy resin component of the paint is as follows:

[0057] (1) Add epoxy resin E51, diluent AGE, dispersant BYK111, defoamer Okawa H1129, and leveling agent BYK333 into a high-speed dispersing mixer at a speed of 2000 r / min for 10 min;

[0058] (2) Add titanium dioxide, iron oxide pigment and expandable microspheres into a high-speed disperser at a speed of 2000 r / min and continue to disperse for 60 min;

[0059] (3) Add heavy calcium, precipitated barium sulfate, and anti-settling agent and continue to disperse for 60 minutes;

[0060] (4) After dispersion, transfer the paint to a sand mill and grind for 30 minutes.

[0061] The construction method of the epoxy resin paint is as follows:

[0062] Mix the epoxy resin component and the curing agent component in proportion and add them to a heated sprayer. Set the sprayer temperature to 80°C and then spray. If you need to increase the thickness of the paint film, you can spray multiple times.

[0063] Embodiment 3

[0064] The weight ratio of the epoxy resin component to the curing agent component is 5:1.

[0065] The epoxy resin component includes the following materials: 100 parts of epoxy resin E44, 10 parts of diluent BGE, 100 parts of heavy calcium (2000 mesh), 15 parts of precipitated barium sulfate (2000 mesh), 2 parts of titanium dioxide (2000 mesh), 2 parts of red iron oxide (500 mesh), 2 parts of expandable microspheres 120DU25, 1 part of dispersant SDJ8012, 1 part of defoamer Tego900, 2 parts of anti-settling agent LV, and 1 part of leveling agent BYK354.

[0066] The curing agent component is 100 parts of phenolic amine SF-PAA466 and 30 parts of polyaspartic acid ester Desmophen XP7161.

[0067] The preparation method of the epoxy resin component of the paint is as follows:

[0068] (1) Add epoxy resin E44, diluent BGE, dispersant SDJ8012, defoamer Tego900, and leveling agent BYK354 into a high-speed disperser at a speed of 1800 r / min for 8 min;

[0069] (2) Add titanium dioxide, iron oxide pigment and expandable microspheres into a high-speed disperser at a speed of 1800 r / min and continue to disperse for 45 minutes;

[0070] (3) Add heavy calcium, precipitated barium sulfate, and anti-precipitation agent and continue to disperse for 45 minutes;

[0071] (4) After dispersion, transfer the paint to a sand mill and grind for 20 minutes.

[0072] The construction method of the epoxy resin paint is as follows:

[0073] Mix the epoxy resin component and the curing agent component in proportion and add them to a heated sprayer. Set the sprayer temperature to 80°C and then spray. If you need to increase the thickness of the paint film, you can spray multiple times.

[0074] Embodiment 4

[0075] The weight ratio of epoxy resin component to curing agent component is 3.5:1.

[0076] The epoxy resin component includes the following materials: 100 parts of epoxy resin F44, 10 parts of diluent 692, 50 parts of heavy calcium (325 mesh), 10 parts of precipitated barium sulfate (325 mesh), 0.5 parts of titanium dioxide (1250 mesh), 0.5 parts of iron oxide green (325 mesh), 5 parts of expandable microspheres JH96D, 0.05 parts of dispersant DC-51, 0.05 parts of defoamer AFE7610, 0.5 parts of anti-settling agent Desbaron 6900-2X, and 0.05 parts of leveling agent BYK3700.

[0077] The curing agent component includes 100 parts of phenolic amine and 40 parts of polyaspartic acid ester Desmophen XP7068.

[0078] The preparation method of the epoxy resin component of the paint is as follows:

[0079] (1) Add epoxy resin F44, diluent 692, dispersant DC-51, defoamer AFE7610, and leveling agent BYK3700 into a high-speed disperser at a speed of 1500 r / min for 5 min;

[0080] (2) Add titanium dioxide, iron oxide pigment and expandable microspheres into a high-speed disperser at a speed of 1500 r / min and continue to disperse for 30 minutes;

[0081] (3) Add heavy calcium, precipitated barium sulfate, expandable microspheres, and anti-settling agent Desbaron 6900-2X and continue to disperse for 30 minutes;

[0082] (4) After dispersion, transfer the paint to a sand mill and grind for 10 minutes.

[0083] The construction method of the epoxy resin paint is as follows:

[0084] Mix the epoxy resin component and the curing agent component in proportion and add them to a heated sprayer. Set the sprayer temperature to 100°C and then spray. If you need to increase the thickness of the paint film, you can spray multiple times.

[0085] Embodiment 5

[0086] The weight ratio of the epoxy resin component to the curing agent component is 4:1.

[0087] The epoxy resin component includes the following materials: 100 parts of epoxy resin E51, 80 parts of heavy calcium (3000 mesh), 10 parts of precipitated barium sulfate (2000 mesh), 1 part of titanium dioxide (3000 mesh), 1.5 parts of iron oxide blue (700 mesh), 3 parts of expandable microspheres 120UD15, 0.5 parts of powder Silok7465N, 0.5 parts of defoaming agent Tiande DJ1356, 1 part of anti-settling agent Nuoyi NY-200, and 0.5 parts of leveling agent Qingtian DH3170.

[0088] The curing agent component is 100 parts of phenolic amine T31 and 30 parts of polyaspartic acid ester Desmophen NH1220.

[0089] The preparation method of the epoxy resin component of the paint is as follows:

[0090] (1) Add epoxy resin E51, dispersant Silok7465N, defoamer Tiande DJ1356, and leveling agent Qingtian DH3170 into a high-speed dispersing mixer at a speed of 2000 r / min for 10 min;

[0091] (2) Add titanium dioxide, iron oxide pigment and expandable microspheres into a high-speed disperser at a speed of 2000 r / min and continue to disperse for 60 min;

[0092] (3) Add heavy calcium, precipitated barium sulfate, and anti-settling agent NY-200 and continue to disperse for 60 minutes;

[0093] (4) After dispersion, transfer the paint to a sand mill and grind for 30 minutes.

[0094] The construction method of the epoxy resin paint is as follows:

[0095] Mix components A and B in proportion and add them into a heated sprayer. Set the sprayer temperature to 100°C and then spray. If you need to increase the thickness of the paint film, you can spray multiple times.

[0096] Comparative Example 1

[0097] The weight ratio of epoxy resin component to curing agent component is 3.5:1.

[0098] The epoxy resin component includes the following materials: 100 parts of epoxy resin E51, 5 parts of diluent BGE, 30 parts of heavy calcium (1250 mesh), 5 parts of precipitated barium sulfate (1250 mesh), 0 parts of titanium dioxide (1250 mesh), 0.5 parts of iron oxide green (400 mesh), 0.05 parts of dispersant BYK111, 0.05 parts of defoaming agent Deqian 6800, 0.5 parts of anti-settling agent Deqian 908, and 0.05 parts of leveling agent BYK354.

[0099] The curing agent component includes: 100 parts of phenalkamine T31 and 20 parts of polyaspartic acid ester Desmophen NH1420.

[0100] Comparative Example 1 is substantially the same as Example 1, except that expandable microspheres are not added in Comparative Example 1. The preparation method and construction method of Comparative Example 1 are the same as those of Example 1.

[0101] Comparative Example 2

[0102] The weight ratio of epoxy resin component to curing agent component is 3.5:1.

[0103] The epoxy resin component includes the following materials: 100 parts of epoxy resin E51, 5 parts of diluent BGE, 30 parts of heavy calcium (1250 mesh), 5 parts of precipitated barium sulfate (1250 mesh), 0 parts of titanium dioxide (1250 mesh), 1 part of expandable microspheres 120DU15, 0.5 parts of iron oxide green (400 mesh), 0.05 parts of dispersant BYK111, 0.05 parts of defoaming agent Deqian 6800, 0.5 parts of anti-settling agent Deqian 908, and 0.05 parts of leveling agent BYK354.

[0104] The curing agent component includes: 100 parts of phenalkamine T31.

[0105] Comparative Example 2 is substantially the same as Example 1, except that polyaspartic acid ester is not used in Comparative Example 2. The preparation method and construction method of Comparative Example 2 are the same as those of Example 1.

[0106] In order to better illustrate the performance of the epoxy floor coatings provided in Examples 1 to 5 of the present invention, the epoxy floor coatings prepared in each example and comparative example are tested for performance, and the test results are shown in Table 1:

[0107] Table 1 shows the performance test results of the epoxy resin paint prepared in each embodiment and comparative example.

[0108]

[0109] By comparing Example 1 and Comparative Example 1, it can be seen that the thermal conductivity of Comparative Example 1 without adding expandable microspheres is significantly improved, indicating that the thermal insulation performance is reduced, and the hiding power (hiding power is also called covering power, which refers to the minimum amount of paint used to evenly apply the color paint on the surface of an object so that its base color no longer appears) is significantly improved, indicating that the hiding performance of Comparative Example 1 is lower than that of Example 1.

[0110] By comparing Example 1 with Comparative Example 2, it can be seen that the compressive strength of Comparative Example 2 without adding polyaspartic acid ester is significantly lower than that of Example 1, indicating that polyaspartic acid ester can improve the compressive strength of the paint.

[0111] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0112] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. An epoxy resin paint, characterized in that: The raw materials for preparing the epoxy resin paint include an epoxy resin component and a curing agent component, and the weight ratio of the epoxy resin component to the curing agent component is (3-5):1; The raw materials for preparing the epoxy resin component include, by weight: 100-110 parts of epoxy resin, 0-10 parts of diluent, 30-100 parts of heavy calcium, 5-15 parts of precipitated barium sulfate, 1-5 parts of expandable microspheres, 0.05-1 parts of dispersant, 0.05-1 parts of defoamer, 0.5-2 parts of anti-settling agent, 0.05-1 parts of leveling agent, and 0-2 parts of titanium dioxide; The raw materials for preparing the curing agent component include, by weight: 100-110 parts of phenolic amine and 20-50 parts of polyaspartic acid ester; the average particle size of the expandable microspheres is 10-30 μm; The heavy calcium carbonate is heavy calcium carbonate with a mesh size of 325-3000 mesh, and the precipitated barium sulfate is with a mesh size of 325-5000 mesh.

2. The epoxy resin paint according to claim 1, characterized in that: The diluent is a reactive diluent.

3. The epoxy resin paint according to claim 1, characterized in that: The defoamer is an organosilicon defoamer.

4. The epoxy resin paint according to claim 1, characterized in that: The anti-settling agent includes at least one of polyamide-modified hydrogenated castor oil, polyurea, polyamide and organic bentonite.

5. The epoxy resin paint according to claim 1, characterized in that: The raw materials for preparing the epoxy resin component also include 0.5-2 parts of iron oxide pigment.

6. The epoxy resin paint according to claim 5, characterized in that: The titanium dioxide is rutile titanium dioxide with a particle size of 325-3000 meshes, and the iron oxide pigment has a particle size of 325-700 meshes.

7. The epoxy resin paint according to claim 1, characterized in that: The leveling agent includes at least one of an organic silicon rheological additive and an acrylic rheological additive.

8. A method for preparing the epoxy resin paint according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: An epoxy resin component and a curing agent component are obtained respectively; wherein the epoxy resin component is prepared by the following method: epoxy resin, diluent, dispersant, defoamer, and leveling agent are mixed, and stirred and dispersed uniformly to obtain a mixed solution; expandable microspheres, heavy calcium, precipitated barium sulfate, titanium dioxide, and an anti-settling agent are added to the mixed solution, stirred and dispersed, and ground uniformly to obtain the epoxy resin component; The curing agent component is compounded by phenolic amine and polyaspartic acid ester.

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