CN115595040B - Epoxy floor paint and preparation method thereof - Google Patents
Epoxy floor paint and preparation method thereof Download PDFInfo
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- CN115595040B CN115595040B CN202211304778.2A CN202211304778A CN115595040B CN 115595040 B CN115595040 B CN 115595040B CN 202211304778 A CN202211304778 A CN 202211304778A CN 115595040 B CN115595040 B CN 115595040B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
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Abstract
The application relates to the field of coatings, and particularly discloses an epoxy floor paint and a preparation method thereof. The epoxy floor paint is prepared from the following raw materials in parts by weight: 30-60 parts of epoxy resin, 30-50 parts of epoxy resin curing agent, 10-30 parts of modified calcium carbonate, 1-5 parts of reactive diluent and 1-5 parts of other auxiliary agents; the preparation method comprises the following steps: firstly, sequentially adding an active diluent, a wetting dispersant, a leveling agent and a defoaming agent into epoxy resin to form a mixed solution, and then sequentially adding modified calcium carbonate, zn-MOF and an epoxy resin curing agent into the mixed solution to prepare the epoxy floor paint. The epoxy floor paint prepared by the method has excellent strength and wear resistance.
Description
Technical Field
The application relates to the technical field of coatings, in particular to an epoxy floor paint and a preparation method thereof.
Background
The epoxy floor paint is a particularly attractive and long-lasting floor paint, and mainly comprises epoxy resin and an epoxy resin curing agent. The epoxy floor paint has the excellent performances of strong acid and alkali resistance, pressure resistance, impact resistance, mildew resistance, dust resistance, slip resistance, static resistance, electromagnetic wave resistance and the like, and has bright and various colors and easy cleaning.
However, in actual use, the epoxy floor paint is often rubbed by foreign objects, and a paint film abrasion phenomenon is easy to occur.
Disclosure of Invention
In order to improve the wear resistance of the epoxy floor paint, the application provides the epoxy floor paint and a preparation method thereof.
The application provides an epoxy floor paint which adopts the following technical scheme:
an epoxy floor paint is prepared from the following raw materials in parts by weight: 30-60 parts of epoxy resin, 30-50 parts of epoxy resin curing agent, 10-30 parts of modified calcium carbonate, 1-5 parts of reactive diluent and 1-5 parts of other auxiliary agents; the modified calcium carbonate is prepared from the following raw materials in parts by weight: 10-15 parts of polypropylene wax, 30-50 parts of calcium carbonate and 1-5 parts of 2-methyl-4-pentenoic acid.
By adopting the technical scheme, the surface active atoms of the nano calcium carbonate interact with the molecular chains of the epoxy resin, so that the formation of destructive cracks can be reduced, the shearing stress of the epoxy resin is improved, the cracking resistance of a paint film is improved, the toughening and reinforcing effects on the paint film are realized, and the wear resistance of the epoxy floor paint is improved. The 2-methyl-4-pentenoic acid can react with calcium carbonate on the one hand, and the unsaturated bond on the 2-methyl-4-pentenoic acid can be grafted on the polypropylene wax on the other hand, so that the polypropylene wax is bound on the surface of the calcium carbonate particles. Because the polypropylene wax can be uniformly dispersed in the epoxy resin system, the polypropylene wax simultaneously improves the dispersibility of the calcium carbonate in the epoxy resin. And the polypropylene wax has excellent lubricity and fluidity in an epoxy resin system, so that the wear resistance of the epoxy floor paint is improved. Meanwhile, unsaturated bonds in the 2-methyl-4-pentenoic acid can be introduced into two ends of an epoxy molecular chain, so that the toughness and weather resistance of the epoxy resin are improved. Therefore, the wear resistance of the prepared epoxy floor paint is improved.
Preferably, the preparation method of the modified calcium carbonate comprises the following steps: heating calcium carbonate at 60-70 ℃, adding 2-methyl-4-pentenoic acid and an initiator into the calcium carbonate, stirring for 30-40min, adding polypropylene wax, heating to 120-130 ℃, and reacting to obtain the modified calcium carbonate.
By adopting the technical scheme, the free radical generated by the thermal decomposition of the initiator can trigger the 2-methyl-4-pentenoic acid to perform a solid-phase grafting reaction with the polypropylene wax, and meanwhile, the 2-methyl-4-pentenoic acid reacts with the calcium carbonate to be combined on the surface of the calcium carbonate, so that the polypropylene wax is firmly combined on the surface of the calcium carbonate. The polypropylene wax is coated with the calcium carbonate particles, so that the calcium carbonate is uniformly dispersed in the epoxy resin system, the toughening and reinforcing effects on the epoxy resin system are achieved, and the wear resistance and the fluidity of the epoxy floor paint are improved.
Preferably, the particle size of the calcium carbonate is 50nm-100nm.
By adopting the technical scheme, the particle size of the nano particles is controlled in a proper range, the gap of the epoxy resin can be fully filled, the curing shrinkage rate of the epoxy resin is reduced, the calcium carbonate plays a role in toughening and reinforcing the epoxy resin, and the wear resistance of the epoxy floor paint is further improved.
Preferably, the other auxiliary agent is prepared from the following raw materials in parts by weight: 0.4-2 parts of wetting dispersant, 0.2-1 part of flatting agent and 0.4-2 parts of defoamer.
By adopting the technical scheme, the wetting dispersant can improve the dispersibility of the epoxy resin system and the wettability of the epoxy floor paint. The leveling agent can promote the epoxy floor paint to form a flat, smooth and even film in the drying and film forming process. The defoamer can reduce the generation of bubbles in the paint and improve the stability of the epoxy resin system.
Preferably, the epoxy floor paint further comprises 5-10 parts of Zn-MOF, wherein the Zn-MOF is prepared from the following raw materials in parts by weight: 5-10 parts of zinc chloride, 10-20 parts of terephthalic acid and 40-60 parts of N, N-dimethylformamide.
Through the technical scheme, when the epoxy floor paint is coated on metal surfaces such as iron plates and steel plates, zn-MOF molecules are provided with unsaturated metal sites and hetero atoms such as nitrogen, sulfur and oxygen which can be adsorbed on the metal surfaces, so that a layer of protective film can be formed, the Zn-MOF has good compatibility with epoxy resin, the combination of the epoxy floor paint and a metal substrate can be improved, the falling-off of the epoxy floor paint is reduced, and the corrosion resistance of the epoxy floor paint to the substrate can be improved.
Preferably, the Zn-MOF raw material further comprises 10-20 parts of cyclomethicone.
By adopting the technical scheme, volatile matters generated after the cyclomethicone is decomposed at high temperature and low molecular weight silica gel molecules are deposited on the surface of the Zn-MOF material and immediately crosslinked, so that the cyclomethicone can carry out surface hydrophobic modification on the surface of the Zn-MOF material, the hydrophobic property of the Zn-MOF is improved, the stability of the Zn-MOF in an epoxy resin system is enhanced, and the stability of the epoxy floor paint and the corrosion resistance to a substrate are improved. On the other hand, the cyclomethicone is added into an epoxy resin system, can be crosslinked with an epoxy resin molecular chain to form a network structure, and simultaneously improves the wear resistance and the water resistance of the epoxy floor paint.
Preferably, the preparation method of the Zn-MOF comprises the following steps:
mixing zinc chloride, terephthalic acid and N, N-dimethylformamide, introducing nitrogen, performing ultrasonic dispersion for 10-20min, performing drying reaction at 120-130 ℃ for 5-6h, cooling to room temperature, adding a solvent for washing, and finally performing vacuum drying on the solid at 120-130 ℃ to obtain the Zn-MOF.
In a second aspect, the present application provides a method for preparing an epoxy floor paint, which adopts the following technical scheme:
the preparation method of the epoxy floor paint comprises the following steps:
firstly, sequentially adding an active diluent, a wet dispersing agent, a leveling agent and a defoaming agent into epoxy resin to form a mixed solution, and then sequentially adding modified calcium carbonate into the mixed solution, and mixing the epoxy resin curing agent to prepare the epoxy floor paint.
Preferably, zn-MOF is added into the mixed solution in advance for mixing, and then modified calcium carbonate and epoxy resin curing agent are added in sequence.
By adopting the technical scheme, the Zn-MOF is added into the epoxy resin system, and the Zn-MOF is mixed with the epoxy resin system in advance, so that the Zn-MOF can be better dispersed in the epoxy floor paint, and the use effect of the epoxy floor paint is improved.
In summary, the present application has the following beneficial effects:
1. the modified calcium carbonate is added into the epoxy resin system, so that the coating is toughened and reinforced, and the strength and the wear resistance of the epoxy floor paint are improved. And the polypropylene wax is added to modify the calcium carbonate, so that on one hand, the dispersibility of the calcium carbonate in an epoxy resin system is improved, and on the other hand, the lubricity, the wear resistance and the flowability of the epoxy floor paint are improved.
2. According to the epoxy floor paint, the protective film is formed by adsorbing Zn-MOF and metal atoms in the substrate, so that the corrosion resistance of the epoxy floor paint to the substrate is improved, and the falling-off phenomenon of the epoxy floor paint after corrosion is reduced.
3. In the method, cyclomethicone is added, and Zn-MOF is subjected to hydrophobic modification on one hand, so that the Zn-MOF has a hydrophobic effect, and the stability of the Zn-MOF in an epoxy resin system is further improved. On the other hand, the cyclomethicone and the epoxy resin form crosslinking, so that the hydrophobicity of the epoxy resin is improved, and the prepared epoxy floor paint has good water resistance and corrosion resistance.
Detailed Description
The present application is described in further detail below with reference to examples.
In this embodiment, there are no other special cases, and the components used are as follows:
the epoxy resin curing agent is WK-6892 of modified amine curing agent Hui Shun company.
Reactive diluent HK-66 reactive epoxy resin diluent was selected.
BYK-151 was chosen as wetting dispersant.
The leveling agent is selected from digao 410 leveling agents.
The defoamer is BYK-141 defoamer.
The initiator is dibenzoyl peroxide.
The polypropylene wax has a molecular weight of 5000mw.
The solvent used in the preparation of Zn-MOF was N, N-dimethylformamide.
The epoxy resin is liquid epoxy resin.
Preparation example of modified calcium carbonate
Preparation example 1
The modified calcium carbonate is prepared from the following raw materials in parts by weight: 13kg of polypropylene wax, 40kg of calcium carbonate, 3kg of 2-methyl-4-pentenoic acid and 0.5kg of dibenzoyl peroxide. Wherein the particle size of the calcium carbonate is 50nm-60nm.
The preparation method of the modified calcium carbonate comprises the following steps:
firstly, placing calcium carbonate into a high-speed stirrer, stirring at the temperature of 60 ℃ for 5min at the speed of 1440r/min, then adding 2-methyl-4-pentenoic acid and dibenzoyl peroxide into the calcium carbonate, stirring for 30min, then adding polypropylene wax, continuously stirring for 5min, discharging, heating the high-speed stirrer to 120 ℃, and continuously stirring for 20min to obtain the modified calcium carbonate.
Preparation example 2
The modified calcium carbonate is prepared from the following raw materials in parts by weight: 10kg of polypropylene wax, 50kg of calcium carbonate, 5kg of 2-methyl-4-pentenoic acid and 0.5kg of dibenzoyl peroxide. Wherein the particle size of the calcium carbonate is 70nm-80nm.
The preparation method of the modified calcium carbonate comprises the following steps:
firstly, placing calcium carbonate into a high-speed stirrer, stirring at 1440r/min for 5min at 60 ℃, then adding 2-methyl-4-pentenoic acid and dibenzoyl peroxide into the calcium carbonate, stirring for 30min, then adding polypropylene wax, stirring for 5min again, discharging, heating the high-speed stirrer to 120 ℃, and stirring for 20min again to obtain the modified calcium carbonate.
Preparation example 3
The modified calcium carbonate is prepared from the following raw materials in parts by weight: 15kg of polypropylene wax, 30kg of calcium carbonate, 1kg of 2-methyl-4-pentenoic acid and 0.5kg of dibenzoyl peroxide. Wherein the particle size of the calcium carbonate is 90nm-100nm.
The preparation method of the modified calcium carbonate comprises the following steps:
firstly, placing calcium carbonate into a high-speed stirrer, stirring at the speed of 1440r/min for 5min at the temperature of 60 ℃, then adding 2-methyl-4-pentenoic acid and dibenzoyl peroxide into the calcium carbonate, stirring for 30min, then adding polypropylene wax, continuously stirring for 5min, discharging, heating the high-speed stirrer to 120 ℃, and continuously stirring for 20min to obtain the modified calcium carbonate.
Preparation example 4
Preparation example 4 differs from preparation example 1 in that the polypropylene wax in the modified calcium carbonate raw material was replaced with an equivalent amount of polyethylene wax having a molecular weight of 5000mw.
Preparation example 5
Preparation example 5 differs from preparation example 1 in that 2-methyl-4-pentenoic acid in the modified calcium carbonate starting material is replaced by an equivalent amount of undecylenic acid.
Preparation example 6
Preparation example 6 differs from preparation example 1 in that the amount of calcium carbonate used in the modified calcium carbonate raw material was 60kg.
Preparation example 7
Preparation example 7 differs from preparation example 1 in that the calcium carbonate in the modified calcium carbonate raw material has a particle size of 120nm to 130nm.
Preparation example of Zn-MOF
Preparation example 8
The Zn-MOF is prepared from the following raw materials in parts by weight: zinc chloride 7kg, terephthalic acid 15kg, N-dimethylformamide 50kg, cyclomethicone 15kg.
A method for preparing Zn-MOF comprising the steps of:
s1: mixing zinc chloride and N, N-dimethylformamide to form a mixed solution A, mixing terephthalic acid and N, N-dimethylformamide, slowly adding the mixed solution A, introducing nitrogen, performing ultrasonic dispersion for 15min, performing drying reaction for 5h at 130 ℃, cooling to room temperature, adding a solvent for mixing, filtering, collecting a solid, repeatedly washing the solid with the solvent for three times, and finally performing vacuum drying on the solid at 130 ℃;
s2: firstly mixing cyclomethicone with ethanol, then putting the mixture into dried solid, then heating the solid in an oven at 230 ℃ for reaction for 6 hours, and finally naturally cooling the mixture to room temperature to obtain Zn-MOF.
Preparation examples 9 to 10
Preparation examples 9 to 10 differ from preparation example 8 in the content of each component of the Zn-MOF raw material, specifically shown in Table 1.
Table 1: component content tables of preparation examples 8 to 10
PREPARATION EXAMPLE 11
Preparation 11 differs from preparation 8 in that the amount of cyclomethicone used in the Zn-MOF stock was 30kg.
Preparation example 12
Preparation 12 differs from preparation 8 in that the cyclomethicone in the Zn-MOF stock was replaced with an equal amount of dimethicone, dimethicone CAS:9016-00-6.
Preparation example 13
Preparation example 13 differs from preparation example 8 in that no cyclomethicone was included in the Zn-MOF stock.
A method for preparing Zn-MOF comprising the steps of:
mixing zinc chloride and N, N-dimethylformamide to form a mixed solution A, mixing terephthalic acid and N, N-dimethylformamide, slowly adding the mixed solution A, introducing nitrogen, performing ultrasonic dispersion for 15min, performing drying reaction for 5h at 130 ℃, cooling to room temperature, adding a solvent for mixing, filtering, collecting a solid, repeatedly washing the solid with the solvent for three times, and finally performing vacuum drying on the solid at 130 ℃ to obtain Zn-MOF.
PREPARATION EXAMPLE 14
Preparation example 14 differs from preparation example 13 in that the amounts of each component used in the Zn-MOF feedstock are respectively: 5kg of zinc chloride, 10kg of terephthalic acid and 40kg of N, N-dimethylformamide.
Preparation example 15
Preparation example 15 differs from preparation example 13 in that the amounts of each component used in the Zn-MOF feedstock are respectively: 10kg of zinc chloride, 20kg of terephthalic acid and 60kg of N, N-dimethylformamide.
Example 1
An epoxy floor paint is prepared from the following raw materials in parts by weight: 50kg of epoxy resin, 60kg of epoxy resin curing agent, 20kg of modified calcium carbonate, 7kg of Zn-MOF, 3kg of reactive diluent and 3kg of other auxiliary agents. Wherein the auxiliary agent comprises 1.2kg of wetting dispersant, 0.6kg of flatting agent and 1.2kg of defoaming agent. Wherein the modified calcium carbonate in example 1 was derived from preparation example 1, and wherein the Zn-MOF in example 1 was derived from preparation example 8.
The preparation method of the epoxy floor paint comprises the following steps:
firstly, mixing epoxy resin with an active diluent, stirring for 5min at 300r/min, then sequentially adding a wetting dispersant, a leveling agent and a defoaming agent, mixing and stirring for 10min, sequentially adding modified calcium carbonate and Zn-MOF to form a composite liquid, then adding an epoxy resin curing agent into the composite liquid while stirring, and continuing stirring for 20min to prepare the epoxy floor paint.
Examples 2 to 3
Examples 2-3 differ from example 1 in the amount of each component in the epoxy floor paint raw material, see in particular table 2.
Table 2: component content tables of examples 1 to 3
Examples 4-10 differ from example 1 in the sources of modified calcium carbonate and Zn-MOF, see in particular Table 3.
Table 3: component Source Table of examples 4 to 10
Example 11
Example 11 differs from example 1 in that the epoxy floor paint raw material does not contain Zn-MOF.
The preparation method of the epoxy floor paint comprises the following steps:
firstly, mixing epoxy resin and an active diluent, stirring for 5min at the speed of 300r/min, then sequentially adding a wetting dispersant, a leveling agent and a defoaming agent, mixing and stirring for 10min, then adding modified calcium carbonate to form a composite liquid, then adding an epoxy resin curing agent into the composite liquid while stirring, and continuing stirring for 20min to prepare the epoxy floor paint.
Example 12
The difference between example 12 and example 11 is that the epoxy floor paint raw materials comprise the following components in the amounts: 30kg of epoxy resin, 50kg of epoxy resin curing agent, 10kg of modified calcium carbonate, 5kg of reactive diluent and 5kg of other auxiliary agents. Wherein the auxiliary agent comprises 2kg of wetting dispersant, 1kg of flatting agent and 2kg of defoaming agent.
Example 13
The difference between example 13 and example 11 is that the epoxy floor paint raw materials comprise the following components in the amounts: 60kg of epoxy resin, 30kg of epoxy resin curing agent, 30kg of modified calcium carbonate, 1kg of reactive diluent and 1kg of other auxiliary agents. Wherein the auxiliary agent comprises 0.4kg of wetting dispersant, 0.2kg of flatting agent and 0.4kg of defoaming agent.
Example 14
Example 14 differs from example 1 in that the amount of Zn-MOF used in the epoxy floor paint raw material was 20kg.
Example 15
Example 15 differs from example 1 in that the modified calcium carbonate in the epoxy floor paint raw material was derived from preparation 7.
Comparative example 1
Comparative example 1 differs from example 1 in that the modified calcium carbonate in the epoxy floor paint raw material was derived from preparation example 4.
Comparative example 2
Comparative example 2 differs from example 1 in that the modified calcium carbonate in the epoxy floor paint raw material was derived from preparation example 5.
Comparative example 3
Comparative example 3 differs from example 1 in that the modified calcium carbonate in the epoxy floor paint raw material was derived from preparation example 6.
Comparative example 4
Comparative example 4 differs from example 1 in that the amount of modified calcium carbonate used in the epoxy floor paint raw material was 35kg.
Comparative example 5
Comparative example 5 differs from example 1 in that the modified calcium carbonate in the epoxy floor paint raw material was replaced with an equivalent amount of calcium carbonate having a particle size of 50nm to 100nm.
Performance test
For the epoxy floor paints provided in examples 1 to 15 and comparative examples 1 to 5 of the present application, the following performance tests were performed, and the test data are shown in table 4.
1. Water resistance
The water resistance of the coating is tested by using GB/T1733-1993 'method for measuring the water resistance of a paint film', 2/3 of the length of a carbon steel sheet coated with an epoxy floor paint coating is soaked in water by using a soaking test method, the water temperature is adjusted to 23 ℃, and the change of the coating after 24 hours, 50 hours, 100 hours and 200 hours of soaking is regulated and observed, so that the water resistance of the coating is detected, and whether the paint film is dissolved or falls is detected.
2. Corrosion resistance
Determination of neutral salt spray resistance of paints and varnishes Using GB1771-91
And spraying salt fog for 15min every 45min in a salt fog test box with the salt water concentration of 3.5% at the temperature of 40 ℃ for the paint film sample plate, and observing the appearance damage degree of the sample plate after test periods of 24h, 50h, 100h, 200h, 300h and 400 h.
3. Strength of
The strength of the epoxy resin adhesive was tested according to the method specified in GB/T7124-2008 determination of tensile shear Strength of adhesive.
4. Wear resistance
The abrasion resistance of the epoxy terrace paint film is expressed by the weight loss gram of the coating paint film after a certain number of grinding turns by adopting a paint film abrasion resistance meter according to GB1768-79 paint film abrasion resistance measurement method.
Table 4: epoxy floor paint performance detection table
As can be seen from the detection results of examples 1-5, the epoxy floor paint prepared by the application has good service performance, and the epoxy floor paint has excellent wear resistance, corrosion resistance, hardness and wear resistance through the combination of the modified calcium carbonate and the Zn-MOF with an epoxy resin system, wherein example 1 is the optimal example.
From examples 6-7, it is clear that the use of an excess of cyclomethicone in example 6 affects the performance of the epoxy floor paint, and that it is possible that an excess of cyclomethicone adversely affects the stability of the Zn-MOF in the epoxy resin system. In the embodiment 7, other hydrophobic compounds are used for replacing the cyclomethicone, and the detection result shows that the performance of the epoxy floor paint is reduced, so that the cyclomethicone can carry out surface hydrophobic modification on the surface of the Zn-MOF material on one hand, and can also form a network structure by crosslinking with the molecular chain of the epoxy resin after being added into the epoxy resin system, thereby improving the water resistance, the stability and the corrosion resistance of the epoxy resin coating.
From the detection results of examples 8 to 10, no cyclomethicone was used in examples 8, 9 and 10 and the content of each component in the raw material for preparing Zn-MOF was adjusted, and from the detection results, the hydrophobic performance of the epoxy floor paint was affected, which means that the modification of Zn-MOF by cyclomethicone affected the performance of the epoxy floor paint.
According to the detection results of examples 11-13, zn-MOF is not used in example 11, example 12 and example 13, and the content of each component in the raw materials of the epoxy floor paint is adjusted, and according to the detection results, the corrosion resistance of the epoxy floor paint is affected, so that Zn-MOF molecules can be adsorbed on the metal surface to form a protective film, and the corrosion resistance of the epoxy floor paint can be improved. Meanwhile, the strength and the wear resistance of the epoxy floor paint are correspondingly reduced, which indicates that the combination of Zn-MOF molecules and substrate molecules improves the wear resistance of the epoxy floor paint.
As can be seen from the detection results of example 14, the use of excessive Zn-MOF in example 14 affects the stability of Zn-MOF in the epoxy system and the stability and corrosion resistance of the epoxy floor paint, so that the epoxy floor paint is easy to dissolve and fall off.
From the results of the test in example 15, it is clear that the use of calcium carbonate with different particle sizes in example 15 affects the binding between calcium carbonate particles and epoxy resin molecules, thereby affecting the reinforcing effect of calcium carbonate on epoxy resin.
Compared with the example 1, the polyethylene wax is used for replacing the polypropylene wax, the undecylenic acid is used for replacing the 2-methyl-4-pentenoic acid in the example 1, the calcium carbonate is added in the example 3, the performance of the epoxy floor paint is affected, the polypropylene wax has more excellent lubricity and dispersibility in an epoxy resin system, and the 2-methyl-4-pentenoic acid promotes the combination between the polypropylene wax and the calcium carbonate on the one hand, improves the dispersibility of the calcium carbonate in the epoxy resin system and improves the strength of the epoxy floor paint. On the other hand, 2-methyl-4-pentenoic acid can be combined with an epoxy resin molecular chain in an epoxy resin system, so that the toughness of the epoxy floor paint is improved. The polypropylene wax and the 2-methyl-4-pentenoic acid are mutually combined to modify the calcium carbonate, and simultaneously the hardness and the wear resistance of the epoxy floor paint are improved.
Compared with the embodiment 1, the comparative example 4 increases the dosage of the modified calcium carbonate, and the detection result shows that the service performance of the epoxy floor paint is affected to a certain extent, and the excessive calcium carbonate is added into the epoxy resin system to generate particle agglomeration phenomenon, so that the strength and the wear resistance of the epoxy floor paint are affected.
Compared with the example 1, the unmodified calcium carbonate which is commonly used in the market and is adopted in the comparative example 5, and the detection result shows that the comprehensive use performance of the epoxy floor paint is affected, and the strength and the wear resistance of the epoxy floor paint are affected.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (5)
1. The epoxy floor paint is characterized by being prepared from the following raw materials in parts by weight: 30-60 parts of epoxy resin, 30-50 parts of epoxy resin curing agent, 10-30 parts of modified calcium carbonate, 1-5 parts of reactive diluent, 5-10 parts of Zn-MOF and 1-5 parts of other auxiliary agents; the modified calcium carbonate is prepared from the following raw materials in parts by weight: 10-15 parts of polypropylene wax, 30-50 parts of calcium carbonate and 1-5 parts of 2-methyl-4-pentenoic acid;
the particle size of the calcium carbonate is 50nm-100nm;
the preparation method of the modified calcium carbonate comprises the following steps: firstly heating calcium carbonate at 60-70 ℃, then adding 2-methyl-4-pentenoic acid and an initiator into the calcium carbonate, stirring for 30-40min, then adding polypropylene wax, heating to 120-130 ℃, and reacting to obtain modified calcium carbonate;
the Zn-MOF is prepared from the following raw materials in parts by weight: 5-10 parts of zinc chloride, 10-20 parts of terephthalic acid, 40-60 parts of N, N-dimethylformamide and 10-20 parts of cyclomethicone.
2. The epoxy floor paint of claim 1, wherein the other auxiliary agents are prepared from the following raw materials in parts by weight: 0.4-2 parts of wetting dispersant, 0.2-1 part of flatting agent and 0.4-2 parts of defoamer.
3. The epoxy floor paint of claim 1, wherein the preparation method of the Zn-MOF comprises the following steps:
mixing zinc chloride, terephthalic acid and N, N-dimethylformamide, introducing nitrogen, performing ultrasonic dispersion for 10-20min, reacting for 5-6h at 120-130 ℃, cooling to room temperature, adding a solvent for washing, and finally vacuum drying the solid at 120-130 ℃ to obtain the Zn-MOF.
4. A method for preparing the epoxy floor paint as claimed in claim 2, comprising the steps of:
the reactive diluent, the wetting dispersant, the leveling agent and the defoamer are sequentially added into the epoxy resin to form a mixed solution, then modified calcium carbonate is added into the mixed solution, and finally the mixed solution is mixed with the epoxy resin curing agent to prepare the epoxy floor paint.
5. The method for preparing epoxy floor paint according to claim 4, wherein Zn-MOF is added into the mixed solution in advance for mixing, and then modified calcium carbonate and epoxy resin curing agent are added in sequence.
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| CN108864886A (en) * | 2018-05-15 | 2018-11-23 | Jslm有限公司 | A kind of epoxy floor material and preparation method thereof |
| CN110003768A (en) * | 2019-03-20 | 2019-07-12 | 河北晨阳工贸集团有限公司 | A kind of floor tile reparation epoxide terrace paint and preparation method thereof |
| CN115093768A (en) * | 2022-06-14 | 2022-09-23 | 中山大学 | Solvent-free modified epoxy anticorrosive coating and preparation method and application thereof |
| CN115155533A (en) * | 2022-06-30 | 2022-10-11 | 华南理工大学 | Application of hydrophobic long-chain vapor deposition modified MOFs adsorbent in separation of methane and nitrogen |
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| KR20180121608A (en) * | 2016-03-11 | 2018-11-07 | 커먼웰쓰 사이언티픽 앤드 인더스트리얼 리서치 오가니제이션 | Polymer materials and compositions for corrosion inhibition |
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|---|---|---|---|---|
| CN101220216A (en) * | 2007-12-18 | 2008-07-16 | 福建师范大学 | Method for producing inorganic powder body with 'nucleus-shell' structure by surface modification |
| CN108864886A (en) * | 2018-05-15 | 2018-11-23 | Jslm有限公司 | A kind of epoxy floor material and preparation method thereof |
| CN110003768A (en) * | 2019-03-20 | 2019-07-12 | 河北晨阳工贸集团有限公司 | A kind of floor tile reparation epoxide terrace paint and preparation method thereof |
| CN115093768A (en) * | 2022-06-14 | 2022-09-23 | 中山大学 | Solvent-free modified epoxy anticorrosive coating and preparation method and application thereof |
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