CN111793373A - Preparation method of modified graphene slurry, epoxy anticorrosive primer and preparation method thereof - Google Patents
Preparation method of modified graphene slurry, epoxy anticorrosive primer and preparation method thereof Download PDFInfo
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- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C3/041—Grinding
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
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- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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- 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
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- 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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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
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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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
Abstract
The invention discloses a preparation method of modified graphene slurry, which comprises the following steps: reducing graphene oxide and sodium hypophosphite to obtain graphene; adding graphene into the nano ZnO suspension for reaction to obtain ZnO-loaded graphene; and then reducing the ZnO-loaded graphene, and mixing with a solvent to obtain the modified graphene slurry. The invention also discloses an epoxy anticorrosive primer, which adopts the modified graphene slurry as a raw material, and a preparation method of the epoxy anticorrosive primer. According to the invention, the nano-zinc-loaded graphene slurry is used in the epoxy anticorrosive primer, so that the salt spray resistance of the epoxy anticorrosive primer is greatly improved, and meanwhile, the amount of zinc powder is greatly reduced, so that the nano-zinc-loaded graphene slurry is suitable for steel structural members with higher requirements on anticorrosive performance.
Description
Technical Field
The invention belongs to the field of metal corrosion prevention, and particularly relates to a preparation method of modified graphene slurry, an epoxy anticorrosive primer adopting the graphene slurry and a preparation method of the epoxy anticorrosive primer.
Background
At present, the primer used in the steel structure anticorrosion field is mainly epoxy zinc-rich primer, gray mica iron oxide primer, epoxy iron red primer, inorganic zinc-rich primer, iron red alcohol acid primer, iron red phenolic primer and the like. The epoxy zinc-rich primer is a steel structure anticorrosion primer which is widely applied, has good chemical resistance and adhesive force, good mechanical property and high hardness, and the addition of zinc powder plays a role in cathodic protection, can effectively weaken the chemical reaction of surface corrosion of various materials and plays a very good role in protecting a base material. However, the conventional epoxy zinc-rich primer has many problems, such as the content of zinc powder in the epoxy zinc-rich primer system is generally very high and is not environment-friendly, mainly because the zinc powder is used in an excessive amount, the zinc salt formed by the reaction of the zinc powder is easily dissolved in water, the zinc content in the water is increased, the water pollution is caused, and the epoxy zinc-rich primer has great toxicity to fish and other aquatic organisms, and in addition, the zinc can enter the soil through a certain way and then is treated with Zn (OH)+、ZnCl+、Zn(NO3)+The existence of ions or zinc salts causes the imbalance of the pH value of soil, and causes soil pollution; on the other hand, if the content of zinc powder is too high, the production cost of epoxy zinc-rich is also high. The traditional zinc-rich primer has higher density which is 2 times of that of the common epoxy primer, cannot be applied to special equipment, and can cause the zinc-rich primer to easily sink in the storage process due to the high density; and the parts coated with the zinc-rich primer can generate zinc oxide smoke dust and zinc vapor during hot processing such as welding, cutting and the like, and can also generate harm to human bodies.
The graphene is a hexagonal honeycomb-shaped planar two-dimensional structure material formed by hybridization and connection of carbon atoms in sp2, has large specific surface area, good mechanical property, high chemical stability and stable thermodynamics, and can form a labyrinth physical barrier in a coating to isolate corrosion factors and construct an electric conduction and heat conduction channel due to a unique two-dimensional lamellar structure. Therefore, at present, many efforts are made to add graphene as an anti-corrosion aid, but the technology still has certain defects at present. For example, CN201710809953.6 discloses a low-cost graphene slurry modified epoxy zinc-containing primer and a preparation method thereof, which reduces the content of zinc powder, but does not significantly improve the salt spray effect thereof, and the technology does not refer to the graphene slurry preparation method in detail; CN105623471A discloses an epoxy resin-graphene-zinc powder anticorrosive paint and a preparation method thereof, wherein although the content of zinc powder is reduced, the anticorrosive performance of the paint is not obviously improved, and the salt spray resistance time is only 600 h; CN105505110A discloses a graphene-coated zinc-plating anticorrosive paint and a preparation method thereof, wherein 55-76 parts of zinc powder in the graphene-coated zinc-plating anticorrosive paint has good anticorrosive performance, but the dosage of the zinc powder is not effectively reduced; CN105713481A discloses a graphene modified epoxy zinc-rich primer and a preparation method thereof, wherein zinc powder accounts for 70-90 parts of the primer component, the amount of the zinc powder is not reduced, the density of the primer is high, and the production cost is high.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects and shortcomings in the background art, and provide a preparation method of modified graphene slurry, an epoxy anticorrosive primer and a preparation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a preparation method of modified graphene slurry comprises the following steps:
(1) mixing the graphene oxide dispersion liquid with a sodium hypophosphite aqueous solution, carrying out reduction reaction, separating, washing and drying to obtain graphene; the method comprises the following steps of (1) reducing graphene oxide by using sodium hypophosphite as a reducing agent, wherein the sodium hypophosphite is easy to dissolve in water and can form stable and uniform water-containing solution, and the sodium hypophosphite aqueous solution is neutral and cannot damage the graphene lamellar structure; meanwhile, the graphene oxide contains a large number of oxygen-containing functional groups, and sodium hypophosphite can be well attached to the surface of the graphene oxide and can be in contact with the oxygen-containing functional groups on the surface of the graphene oxide to react, so that the aim of reducing the graphene oxide is achieved, and high-quality graphene with few impurities and other oxygen-containing functional groups in a lamellar structure and fewer lamellar structures can be obtained;
(2) adding the graphene prepared in the step (1) into the nano ZnO suspension, and performing ultrasonic dispersion, washing and drying to obtain ZnO-loaded graphene powder;
(3) placing the ZnO-loaded graphene powder in a reduction device, and reacting in a reducing atmosphere, wherein the reaction temperature is controlled to be 140-180 ℃, and the reaction time is 1-3h, so as to obtain modified Zn-loaded graphene;
(4) and mixing the modified Zn-loaded graphene and an organic solvent, grinding, and then adding a dispersing agent for dispersing to obtain the modified graphene slurry.
Further, in the step (1), the dosage ratio of the graphene oxide to the sodium hypophosphite is 1: 1-1.5; the temperature of the reduction reaction is 70-90 ℃ and the time is 2-4 h;
further, in the step (2), the mass ratio of the nano ZnO to the graphene is 100: 1-10; and ultrasonically dispersing for 2-4 h.
Further, in the step (4), the mass ratio of the modified Zn-loaded graphene to the dispersant to the organic solvent is (5-20): (1-10): (60-90); the organic solvent comprises one or more of methyl isobutyl ketone, xylene, n-butyl alcohol and cyclohexanone; the dispersing agent is one or more of triethyl hexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives and polyvinylpyrrolidone.
Further, in the step (4), the speed of the motor in the grinding process is 3000-4000r/min, and the grinding time is 2-4 h; the dispersion comprises pre-dispersion and ultrasonic dispersion, wherein the pre-dispersion refers to grinding and dispersing for 0.5-1h in a grinding machine; the ultrasonic dispersion time is 1-3h, and the ultrasonic dispersion temperature is not higher than 50 ℃.
Further, in the step (2), the nano ZnO suspension is prepared by mixing nano ZnO and a solvent, grinding and dispersing for 0.5-1h, wherein the solvent is at least one of N-methylpyrrolidone, dimethylformamide and isopropanol.
Further, in the step (1), the graphene oxide dispersion liquid is obtained by placing graphene oxide in deionized water and ultrasonically dispersing for 1-3 hours; drying refers to drying at 80-120 deg.C under vacuum for 5-7 h.
Further, in the step (2), drying refers to drying for 5-7h under the vacuum condition of 130-150 ℃.
Further, in the step (3), the reducing atmosphere refers to a mixed atmosphere of a reducing gas CO and a protective gas (e.g., nitrogen).
As a general inventive concept, the invention also provides an epoxy anticorrosive primer containing the modified graphene slurry prepared by the preparation method.
Preferably, the epoxy anticorrosion primer is a multi-component epoxy anticorrosion primer comprising a component A and a component B, wherein, in parts by mass,
the component A comprises:
the component B comprises:
the epoxy anticorrosive primer is preferably used, and the mass ratio of the component A to the component B is 5-20: 1. Further preferably, the mass ratio of the component A to the component B is 10-20: 1.
Preferably, the epoxy resin includes one or more of bisphenol a epoxy resin, novolac epoxy resin, bisphenol F epoxy resin, polyphenol glycidyl ether epoxy resin, heterocyclic epoxy resin, mixed epoxy resin and bisphenol S epoxy resin;
the inorganic filler comprises one or more of mica powder, griseofulvin ferric oxide, precipitated barium sulfate, titanium dioxide, talcum powder and light calcium carbonate;
the solvent comprises one or more of methyl isobutyl ketone, xylene, n-butyl alcohol and cyclohexanone;
the other auxiliary agents comprise one or more of an anti-settling stabilizer, a dispersing agent and a flatting agent.
As a general inventive concept, the present invention also provides a method for preparing the epoxy anticorrosive primer, including the steps of:
s1: dispersing the modified graphene slurry and the epoxy resin in dispersing equipment;
s2: adding zinc powder, inorganic filler, solvent and other auxiliary agent components into the mixed system of S1, continuously dispersing, and finishing dispersion to obtain a component A;
s3: and mixing the polyamide curing agent, the dimethylbenzene, the n-butyl alcohol and the cyclohexanone, stirring for 4-6min, and uniformly mixing to obtain the component B.
In the preparation method, the preferable dispersion rotation speed of S1 and S2 is 3000-4000r/min, and the dispersion time is 0.5-1 h.
Compared with the prior art, the invention has the advantages that:
(1) according to the invention, the nano zinc is inserted into the surface of the graphene sheet layer, and the nano zinc on the surface of the graphene is beneficial to separating the adjacent graphene sheet layers, so that the multi-layer graphene can be conveniently stripped to form thinner graphene, clustering of the graphene sheet layers can be effectively prevented, and the graphene has better dispersibility in the system, therefore, the graphene loaded with the nano zinc is prepared into the graphene slurry, and the stable dispersibility of the slurry can be ensured.
(2) In the process of preparing the graphene slurry, sodium hypophosphite is used as a reducing agent to reduce the graphene oxide, so that high-quality graphene with few impurities and other oxygen-containing functional groups in a lamellar structure and less lamellar structure can be obtained.
(3) According to the invention, the nano-zinc-loaded graphene slurry is applied to the epoxy anticorrosive primer, the nano-zinc-loaded graphene slurry can have good dispersibility in the epoxy anticorrosive primer, and in the anticorrosive primer, the nano-zinc on the surface of the graphene can fill the gap between the zinc powder and the graphene, so that the effect of strengthening an electron transfer channel in an anticorrosive coating is achieved, the connection mode of the electron transfer channel is more diversified, and the electron transfer channel is more stable; and the graphene has conductivity, so that the stability of an electron transfer channel of a system can be enhanced, the graphene has a very large specific surface area, the shielding property of the anticorrosion primer on a protective substrate can be enhanced, and the salt spray resistance of the coating can not be influenced while the amount of zinc powder in the epoxy anticorrosion primer is reduced.
(4) According to the invention, the nano-zinc-loaded graphene slurry is used in the epoxy anticorrosive primer, so that the salt spray resistance of the epoxy anticorrosive primer is greatly improved, and meanwhile, the amount of zinc powder is greatly reduced, so that the nano-zinc-loaded graphene slurry is suitable for steel structural members with higher requirements on anticorrosive performance.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
The criteria for the mechanical properties test in the present invention are as follows:
testing of salt spray resistance: GB/T1771-2007 determination of neutral salt spray resistance of colored paint and varnish.
The modified graphene slurry used in the following examples was prepared as follows:
(1) putting 10g of graphene oxide in 200g of deionized water, performing ultrasonic dispersion for 2 hours to obtain a uniform graphene oxide aqueous dispersion solution, adding 200ml of a 50g/L sodium hypophosphite aqueous solution serving as a reducing agent, reducing for 4 hours at 80 ℃, repeatedly separating and washing to obtain impurity-free graphene, and then putting the graphene in a 100 ℃ vacuum drying device for drying for 6 hours to obtain high-quality graphene powder.
(2) Weighing nano 100g ZnO and solvent (N-methyl pyrrolidone), and dispersing and grinding for 0.5h to prepare nano ZnO suspension; and (2) adding 7g of the partial graphene prepared in the step (1) into the mixture to obtain a pre-dispersion liquid, transferring the pre-dispersion liquid into ultrasonic equipment to perform ultrasonic dispersion for 3 hours to obtain ZnO-loaded graphene slurry, repeatedly separating and washing to obtain impurity-free reduced ZnO-loaded graphene, and drying the reduced ZnO-loaded graphene in a vacuum drying device at 140 ℃ for 6 hours to obtain ZnO-loaded graphene powder.
(3) And (3) placing the ZnO-loaded graphene obtained in the step (2) in a reduction device, introducing a reducing gas CO and a protective gas nitrogen, controlling the reaction temperature at 160 ℃ and the reaction time at 2h, and obtaining the modified Zn-loaded graphene.
(4) Adding 15g of modified Zn-loaded graphene and 80g of organic solvent (methyl isobutyl ketone) into a dispersion tank for grinding (rotating speed is 3000r/min), then adding 5g of dispersant (triethylhexylphosphoric acid) for grinding and pre-dispersing for 1h to obtain pre-dispersion liquid, and then transferring the pre-dispersion liquid into ultrasonic equipment for ultrasonic dispersion for 2h (the temperature of ultrasonic dispersion is not more than 50 ℃) to obtain modified graphene slurry.
Example 1:
the epoxy anticorrosive primer comprises a component A and a component B in a mass ratio of 10:1, wherein the component A comprises the following components in parts by mass: 8 parts of modified graphene slurry, 10 parts of bisphenol A epoxy resin, 40 parts of zinc powder, 40 parts of filler (mica powder), 2 parts of assistant anti-settling stabilizer and 8 parts of solvent (methyl isobutyl ketone); the component B comprises the following components: 40 parts of polyamide curing agent, 35 parts of dimethylbenzene, 15 parts of n-butanol and 10 parts of cyclohexanone.
The preparation method of the epoxy anticorrosive primer of the embodiment specifically comprises the following steps:
s1: mixing and dispersing the modified graphene slurry and the epoxy resin in dispersing equipment for 1h, wherein the dispersing speed is 3000 r/min;
s2: adding zinc powder, filler, solvent and auxiliary agent into the mixed system after S1, continuously dispersing for 1h at the dispersion speed of 3000r/min to obtain the component A of the epoxy anticorrosive primer for the steel structure;
s3: and mixing the polyamide curing agent, the dimethylbenzene, the n-butyl alcohol and the cyclohexanone, and manually stirring for 5min to uniformly disperse and mix the mixture to obtain the component B of the epoxy anticorrosive primer for the steel structure.
Comparative example 1:
the comparative example is different from example 1 in that the modified graphene slurry is not contained, and other components and contents are completely the same as those of example 1.
Example 2:
the epoxy anticorrosive primer comprises a component A and a component B in a mass ratio of 10:1, wherein the component A comprises the following components in parts by mass: 8 parts of modified graphene slurry, 10 parts of polyphenol type glycidyl ether epoxy resin, 60 parts of zinc powder, 20 parts of filler titanium dioxide, 2 parts of other additives (an anti-settling stabilizer, a dispersing agent and a flatting agent) and 8 parts of a solvent; the component B comprises the following components: 40 parts of polyamide curing agent, 35 parts of dimethylbenzene, 15 parts of n-butanol and 10 parts of cyclohexanone.
The preparation method of the epoxy anticorrosive primer of the embodiment is completely the same as that of the embodiment 1.
Comparative example 2:
the comparative example is different from example 2 in that the modified graphene slurry is not contained, and other components and contents are completely the same as example 2. The preparation method is completely the same as that of example 2.
Example 3:
the epoxy anticorrosive primer comprises a component A and a component B in a mass ratio of 10:1, wherein the component A comprises the following components in parts by mass: 8 parts of modified graphene slurry, 10 parts of phenolic epoxy resin, 30 parts of zinc powder, 50 parts of filler mica powder, 2 parts of other auxiliaries (an anti-settling stabilizer, a dispersing agent and a flatting agent) and 8 parts of solvent methyl isobutyl ketone; the component B comprises the following components: 40 parts of polyamide curing agent, 35 parts of dimethylbenzene, 15 parts of n-butanol and 10 parts of cyclohexanone.
The preparation method of the epoxy anticorrosive primer of the embodiment is completely the same as that of the embodiment 1.
Comparative example 3:
the comparative example is different from example 3 in that the modified graphene slurry is not contained, and other components and contents are completely the same as those of example 2. The preparation method is exactly the same as that of example 3.
Example 4:
the epoxy anticorrosive primer comprises a component A and a component B in a mass ratio of 10:1, wherein the component A comprises the following components in parts by mass: 8 parts of modified graphene slurry, 10 parts of bisphenol A epoxy resin, 30 parts of zinc powder, 50 parts of filler mica powder, 2 parts of other auxiliaries (an anti-settling stabilizer, a dispersing agent and a flatting agent) and 8 parts of solvent methyl isobutyl ketone; the component B comprises the following components: 40 parts of polyamide curing agent, 35 parts of dimethylbenzene, 15 parts of n-butanol and 10 parts of cyclohexanone.
The preparation method of the epoxy anticorrosive primer of the embodiment is completely the same as that of the embodiment 1.
Comparative example 4:
this comparative example differs from example 4 in that it contains the same amount of commercially available graphene slurry, and the other components and contents are exactly the same as example 4. The preparation method is completely the same as that of example 4.
The anti-corrosive primers of examples 1 to 4 and comparative examples 1 to 4 were tested for their salt spray resistance and the results are shown in Table 1.
Table 1 salt spray performance of the anticorrosion primer for examples and comparative examples
As can be seen from the test results of the specific examples and the comparative examples, the salt spray resistance of the epoxy anticorrosive paint for the steel structure prepared by the method is greatly improved, and compared with a graphene-free epoxy paint, the epoxy anticorrosive paint for the steel structure with 30% of zinc powder content has better salt spray resistance, so that the advantages of reducing the zinc powder content to a great extent, improving the salt spray resistance effect and reducing the system density can be achieved; meanwhile, the graphene slurry with uniform dispersity and stable performance can be obtained by using the preparation method of the graphene slurry.
Claims (10)
1. The preparation method of the modified graphene slurry is characterized by comprising the following steps:
(1) mixing the graphene oxide dispersion liquid with a sodium hypophosphite aqueous solution, carrying out reduction reaction, separating, washing and drying to obtain graphene;
(2) adding the graphene prepared in the step (1) into the nano ZnO suspension, and performing ultrasonic dispersion, washing and drying to obtain ZnO-loaded graphene powder;
(3) placing the ZnO-loaded graphene powder in a reduction device, and reacting in a reducing atmosphere, wherein the reaction temperature is controlled to be 140-180 ℃, and the reaction time is 1-3h, so as to obtain modified Zn-loaded graphene;
(4) and mixing the modified Zn-loaded graphene and an organic solvent, grinding, and then adding a dispersing agent for dispersing to obtain the modified graphene slurry.
2. The preparation method according to claim 1, wherein in the step (1), the dosage ratio of the graphene oxide to the sodium hypophosphite is 1: 1-1.5; the temperature of the reduction reaction is 70-90 ℃ and the time is 2-4 h;
in the step (2), the mass ratio of the nano ZnO to the graphene is 100: 1-10; the time of ultrasonic dispersion is 2-4 h.
3. The preparation method according to claim 1, wherein in the step (4), the mass ratio of the modified Zn-loaded graphene to the dispersant to the organic solvent is (5-20): (1-10): (60-90); the organic solvent comprises one or more of methyl isobutyl ketone, xylene, n-butyl alcohol and cyclohexanone; the dispersing agent is one or more of triethyl hexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives and polyvinylpyrrolidone.
4. The method as claimed in claim 1, wherein in the step (4), the speed of the motor during the grinding process is 3000-; the dispersion comprises pre-dispersion and ultrasonic dispersion, wherein the pre-dispersion refers to grinding and dispersing for 0.5-1h in a grinding machine; the ultrasonic dispersion time is 1-3h, and the ultrasonic dispersion temperature is not higher than 50 ℃.
5. The method according to any one of claims 1 to 4, wherein in the step (2), the nano ZnO suspension is prepared by mixing nano ZnO and a solvent, and grinding and dispersing for 0.5 to 1 hour, wherein the solvent is at least one of N-methylpyrrolidone, dimethylformamide and isopropanol.
6. The epoxy anticorrosive primer is characterized by being a multi-component epoxy anticorrosive primer comprising a component A and a component B, wherein the epoxy anticorrosive primer comprises the following components in parts by mass,
the component A comprises:
wherein the modified graphene slurry is prepared by the preparation method of any one of claims 1 to 5;
the component B comprises:
7. the epoxy anticorrosive primer according to claim 6, wherein the mass ratio of the component A to the component B is 5-20: 1.
8. The epoxy corrosion resistant primer according to claim 6, wherein the epoxy resin comprises one or more of bisphenol A type epoxy resin, novolac type epoxy resin, bisphenol F type epoxy resin, polyphenol type glycidyl ether epoxy resin, heterocyclic type epoxy resin, mixed type epoxy resin and bisphenol S type epoxy resin;
the inorganic filler comprises one or more of mica powder, griseofulvin ferric oxide, precipitated barium sulfate, titanium dioxide, talcum powder and light calcium carbonate;
the solvent comprises one or more of methyl isobutyl ketone, xylene, n-butyl alcohol and cyclohexanone;
the other auxiliary agents comprise one or more of an anti-settling stabilizer, a dispersing agent and a flatting agent.
9. A method of preparing the epoxy corrosion resistant primer according to any one of claims 6 to 8, comprising the steps of:
s1: dispersing the modified graphene slurry and the epoxy resin in dispersing equipment;
s2: adding zinc powder, inorganic filler, solvent and other auxiliary agent components into the mixed system of S1, continuously dispersing, and finishing dispersion to obtain a component A;
s3: and (3) uniformly mixing the polyamide curing agent, the dimethylbenzene, the n-butyl alcohol and the cyclohexanone to obtain the component B.
10. The method of claim 9, wherein the dispersion speed of S1 and S2 is 3000r/min to 4000r/min, and the dispersion time is 0.5 to 1 hour.
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| CN113698846A (en) * | 2021-09-07 | 2021-11-26 | 江苏冠军科技集团股份有限公司 | Hyperbranched epoxy zinc-rich coating and preparation method thereof |
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