CN115926578A - Preparation process of water-based epoxy resin composite coating - Google Patents
Preparation process of water-based epoxy resin composite coating Download PDFInfo
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- CN115926578A CN115926578A CN202310015985.4A CN202310015985A CN115926578A CN 115926578 A CN115926578 A CN 115926578A CN 202310015985 A CN202310015985 A CN 202310015985A CN 115926578 A CN115926578 A CN 115926578A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 239000003822 epoxy resin Substances 0.000 title claims abstract description 78
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 78
- 239000002131 composite material Substances 0.000 title claims abstract description 76
- 238000000576 coating method Methods 0.000 title claims abstract description 75
- 239000011248 coating agent Substances 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 238000003756 stirring Methods 0.000 claims abstract description 57
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 39
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003112 inhibitor Substances 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 239000002904 solvent Substances 0.000 claims abstract description 21
- 239000007787 solid Substances 0.000 claims abstract description 10
- 238000012216 screening Methods 0.000 claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 24
- 239000003054 catalyst Substances 0.000 claims description 17
- 229910021389 graphene Inorganic materials 0.000 claims description 17
- 229920000767 polyaniline Polymers 0.000 claims description 16
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 14
- KWIPUXXIFQQMKN-UHFFFAOYSA-N 2-azaniumyl-3-(4-cyanophenyl)propanoate Chemical compound OC(=O)C(N)CC1=CC=C(C#N)C=C1 KWIPUXXIFQQMKN-UHFFFAOYSA-N 0.000 claims description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- JPUHCPXFQIXLMW-UHFFFAOYSA-N aluminium triethoxide Chemical group CCO[Al](OCC)OCC JPUHCPXFQIXLMW-UHFFFAOYSA-N 0.000 claims description 10
- 229940090948 ammonium benzoate Drugs 0.000 claims description 10
- 239000011609 ammonium molybdate Substances 0.000 claims description 10
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 10
- 229940010552 ammonium molybdate Drugs 0.000 claims description 10
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 10
- 238000000498 ball milling Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 239000002270 dispersing agent Substances 0.000 claims description 5
- 239000006185 dispersion Substances 0.000 claims description 5
- 239000011858 nanopowder Substances 0.000 claims description 5
- 239000002518 antifoaming agent Substances 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 229910052681 coesite Inorganic materials 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 229910052682 stishovite Inorganic materials 0.000 claims description 4
- 239000012745 toughening agent Substances 0.000 claims description 4
- 229910052905 tridymite Inorganic materials 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 239000002318 adhesion promoter Substances 0.000 claims description 3
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 claims description 2
- 239000003814 drug Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- MYWQGROTKMBNKN-UHFFFAOYSA-N tributoxyalumane Chemical compound [Al+3].CCCC[O-].CCCC[O-].CCCC[O-] MYWQGROTKMBNKN-UHFFFAOYSA-N 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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Abstract
The invention provides a preparation process of a water-based epoxy resin composite coating. The preparation process of the water-based epoxy resin composite coating can add modified graphene oxide, improve the protection force, corrosion resistance and wear resistance, and avoid flash rust by adding solvent water. A preparation process of a water-based epoxy resin composite coating comprises the following steps: proportioning raw materials, mixing and stirring the raw materials, manufacturing and adding modified graphene oxide, manufacturing and adding a flash rust inhibitor, screening solids, and quantitatively barreling. According to the invention, after the raw materials are well proportioned, different raw materials are added quantitatively in batches, so that the raw material mixing efficiency can be improved, the probability of generation of particulate matters can be reduced, and the preparation purity of the water-based epoxy resin composite coating is improved.
Description
Technical Field
The invention relates to a preparation process of a composite coating, in particular to a preparation process of a water-based epoxy resin composite coating.
Background
The water-based epoxy resin coating can be divided into a water dispersion type and a water emulsion type, and has the characteristics of high drying speed, good adhesive force, excellent corrosion resistance and chemical resistance, high solid content and the like.
When the water-based epoxy resin coating is prepared, the preparation ingredients are proportioned in proportion, and then all the ingredients are mixed together to finally obtain the water-based epoxy resin coating, but compared with solvent-based coatings of the same type, the water-based epoxy resin coating has poor adhesion force, corrosion resistance and wear resistance, and the solution is that modified graphene oxide is added in the process of preparing the water-based epoxy resin coating, and in addition, the flash rust phenomenon easily occurs due to the existence of solvent water in the water-based epoxy resin coating.
The preparation process of the water-based epoxy resin composite coating, which can be added with the modified graphene oxide to improve the adhesion force, corrosion resistance and wear resistance and can avoid flash rust by adding solvent water, is developed at present.
Disclosure of Invention
In order to overcome the defects of poor adhesion, corrosion resistance and wear resistance and easy flash rust phenomenon of the existing waterborne epoxy resin coating, the technical problems to be solved are as follows: the preparation process of the water-based epoxy resin composite coating can be added with the modified graphene oxide, improve the adhesion force, the corrosion resistance and the wear resistance, and can avoid flash rust by adding the solvent water.
A preparation process of a water-based epoxy resin composite coating comprises the following raw material medicaments in part by weight:
water-based epoxy resin: 20-38 parts by mass of a curing agent: 3 to 7 parts by mass
Light calcium carbonate: 0.8-1.6 parts by mass of a gas phase nano-material: siO2 1.4-2.7 weight portions
Water-based defoaming agent: 2.1-2.9 parts by mass of an aqueous dispersant: 1.6 to 2.6 parts by mass
A toughening agent: 2.1-3.4 parts by mass of an adhesion promoter: 2.2 to 3.6 parts by mass
Film-forming auxiliary agent: 1.6-2.5 parts by mass of a water-based leveling agent: 1.6 to 2.1 portions by mass
A preparation process of a water-based epoxy resin composite coating comprises the following steps:
s1, respectively pouring 20-38 parts by mass of waterborne epoxy resin, 3-7 parts by mass of a curing agent, 0.8-1.6 parts by mass of light calcium carbonate and 1.4-2.7 parts by mass of gas-phase nano SiO2 into a reactor A, heating for 0.5-2h, mechanically stirring for 10 minutes, continuously adding 2.1-2.9 parts by mass of a waterborne defoaming agent, 1.6-2.6 parts by mass of a waterborne dispersing agent and 2.1-3.4 parts by mass of a toughening agent, and continuously mechanically stirring for 10-80 minutes;
s2, preparing modified graphene oxide;
s3, adding 1.3-6.4 parts by mass of modified graphene oxide, continuously stirring, then adding 2.2-3.6 parts by mass of adhesion promoter, 1.6-2.5 parts by mass of film-forming assistant and 1.6-2.1 parts by mass of aqueous flatting agent, and then mechanically stirring for 0.5-1.5 hours to prepare the aqueous epoxy resin composite coating;
s4, preparing a flash rust inhibitor;
s5, pouring the water-based epoxy resin composite coating into a mixing roller machine, putting 4.8-10.9 parts by mass of a flash rust inhibitor into a blanking box of the mixing roller machine in advance, starting the mixing roller machine, carrying out reciprocating rolling on the water-based epoxy resin composite coating for 5-10 minutes, opening a blanking port of the blanking box while rolling, and slowly dropping the 4.8-10.9 parts by mass of the flash rust inhibitor into the water-based epoxy resin composite coating for 3-5 minutes to prepare the water-based epoxy resin composite coating;
s6, slowly pouring the water-based epoxy resin composite coating into a screening machine, and screening and recycling solids in the water-based epoxy resin composite coating;
and S7, quantitatively barreling the prepared water-based epoxy resin composite coating.
Further, specifically in S2, the steps are as follows:
c1, ball milling and proportioning:
ball-milling graphene oxide into nano powder for 10-30 minutes, wherein the ball-milling time is 1.1-2.3 parts by mass of the powdered graphene oxide, 1-5 parts by mass of an alcohol solvent, 0.1-0.5 part by mass of a catalyst and 10-25 parts by mass of distilled water;
c2, adding an alcohol solvent:
pouring 1-5 parts by mass of an alcohol solvent into the reactor B, dispersing the powdered graphene oxide in the alcohol solvent, ultrasonically dispersing for 0.6-4 h at normal temperature, and uniformly stirring and dispersing to obtain a solution;
c3, adding a catalyst:
continuously adding a catalyst, wherein the adding amount of the catalyst is 1-6mol%, and stirring for 10-30 minutes to obtain a modified graphene oxide dispersion liquid;
c4, reaction:
discharging the gas in the reactor B by using a gas displacement technology, discharging carbon dioxide, stirring and reacting at the pressure of 3-6MPa and the temperature of 50-100 ℃, wherein the reaction time is 5-12h, and cooling to room temperature after the reaction is finished;
c5, washing with water:
and slowly exhausting the gas, filtering to remove the catalyst and the solvent, and centrifugally washing to obtain 1.3-6.4 parts by mass of modified graphene oxide.
Further, the alcohol solvent is ethanol or isopropanol, and the catalyst is aluminum ethoxide, aluminum isopropoxide and aluminum n-butoxide.
Further, the concentration of graphene oxide in the alcohol solvent is 7mg/mL.
Further, specifically, in S3, the process for preparing the flash rust inhibitor is as follows:
a1, preparation of raw materials:
weighing 3kg of ammonium molybdate, 3kg of ammonium benzoate, 10kg of polyaniline aqueous liquid and 90kg of deionized water for later use;
a2, stirring raw materials:
adding 90kg of deionized water into a stirrer, adding 3kg of ammonium molybdate and 3kg of ammonium benzoate, controlling the stirring speed of the stirrer within 300-500r/min, uniformly mixing when the stirring time is 30 minutes, adding 3kg of polyaniline aqueous liquid, continuing to stir for 10 minutes, adding 4kg of polyaniline aqueous liquid, continuing to stir for 10 minutes, finally adding 3kg of polyaniline aqueous liquid, and finally stirring for 30-60 minutes to prepare green semitransparent liquid, namely the composite flash rust inhibitor.
Further, the pH value of the composite flash rust inhibitor is 9.0, the solid content is 11.9%, and the mass part is 4.8-10.9.
Further, in A2, 90kg of deionized water, 3kg of ammonium molybdate and 3kg of ammonium benzoate were left to stand for 30 minutes before stirring.
The invention has the following advantages: 1. according to the invention, after the raw materials are well proportioned, different raw materials are added quantitatively in batches, so that the raw material mixing efficiency can be improved, the generation probability of particulate matters can be reduced, and the preparation purity of the water-based epoxy resin composite coating is further improved.
2. In the preparation process, the modified graphene oxide is added, so that the compatibility with an epoxy resin matrix can be improved, the advantages of the graphene and the waterborne epoxy resin are brought into play, and the coating performance of the composite coating is improved, thereby overcoming the problems of poor adhesion, corrosion resistance and wear resistance of the waterborne epoxy resin coating.
3. In the preparation process, the flash rust inhibitor is prepared and added, has good compatibility with the water-based epoxy resin coating, has the advantages of high efficiency and low toxicity, and can effectively avoid the problem of flash rust.
4. In the preparation process, the catalyst after reaction is filtered and removed, and the catalyst is expensive, so that people can conveniently recycle or regenerate the catalyst, and the preparation cost is reduced.
Drawings
FIG. 1 is a raw material proportioning diagram of the invention.
Detailed Description
The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.
Example 1
A preparation process of a water-based epoxy resin composite coating is shown in figure 1, and comprises the following specific steps:
s1, respectively pouring 25 parts by mass of waterborne epoxy resin, 4 parts by mass of curing agent, 1 part by mass of light calcium carbonate and 2 parts by mass of gas-phase nano SiO2 into a reactor A, heating for 0.5-2h, mechanically stirring for 10 minutes, continuously adding 2.4 parts by mass of waterborne defoaming agent, 2 parts by mass of waterborne dispersant and 2.5 parts by mass of toughening agent, continuously mechanically stirring for 10-80 minutes, adding the raw materials in batches, and stirring for several minutes after adding several raw materials each time, so that the raw materials can be mixed more fully, and the probability of generation of particle substances is reduced.
S2, preparing modified graphene oxide:
c1, ball milling and proportioning:
ball-milling graphene oxide into nano powder for 10-30 minutes, wherein the nano powder is prepared from 1.3 parts by mass of powdered graphene oxide, 2 parts by mass of ethanol, 0.2 part by mass of aluminum ethoxide and 15 parts by mass of distilled water;
c2, adding ethanol:
pouring 2 parts by mass of ethanol into a reactor B, dispersing powdered graphene oxide into the ethanol, performing ultrasonic dispersion for 0.6-4 h at normal temperature, and stirring and dispersing uniformly to obtain a solution, wherein the concentration of the graphene oxide in the ethanol is 7 mg/mL;
c3, adding aluminum ethoxide:
continuously adding 0.2 mass part of aluminum ethoxide, wherein the adding amount of the aluminum ethoxide is 1-6mol%, and stirring for 10-30 minutes to obtain a modified graphene oxide dispersion liquid;
c4, reaction:
discharging the gas in the reactor B by using a gas replacement technology, discharging carbon dioxide, stirring and reacting at 50-100 ℃ under the pressure of 3-6MPa for 5-12h, and cooling to room temperature after the reaction is finished;
c5, washing with water:
and after slowly removing the gas, filtering to remove the catalyst and the solvent, and centrifugally washing to obtain 1.3-6.4 parts by mass of modified graphene oxide.
S3, adding 1.3-6.4 parts by mass of modified graphene oxide, continuously stirring, so that the corrosion resistance and the adhesive force of the water-based epoxy resin composite coating can be improved, then adding 2.2-3.6 parts by mass of an adhesive force promoter, further improving the adhesive force of the water-based epoxy resin composite coating, 1.6-2.5 parts by mass of a film-forming assistant and 1.6-2.1 parts by mass of a water-based flatting agent, and then mechanically stirring for 0.5-1.5 hours to prepare the water-based epoxy resin composite coating;
s4, preparing a flash rust inhibitor:
a1, preparing raw materials:
weighing 3kg of ammonium molybdate, 3kg of ammonium benzoate, 10kg of polyaniline aqueous liquid and 90kg of deionized water for later use;
a2, stirring raw materials:
adding 90kg of deionized water into a stirrer, adding 3kg of ammonium molybdate and 3kg of ammonium benzoate, standing for 30 minutes, controlling the stirring speed of the stirrer within 300-500r/min, uniformly mixing when the stirring time is 30 minutes, adding 3kg of polyaniline aqueous liquid, continuously stirring for 10 minutes, adding 4kg of polyaniline aqueous liquid, continuously stirring for 10 minutes, finally adding 3kg of polyaniline aqueous liquid, and finally stirring for 30-60 minutes to obtain green semitransparent liquid, namely the composite flash rust inhibitor, wherein the pH value of the composite flash rust inhibitor is 9.0, the solid content of the composite flash rust inhibitor is 11.9%, and the mass parts of the composite flash rust inhibitor are 4.8-10.9.
S5, pouring the water-based epoxy resin composite coating into a mixing drum machine, putting 4.8-10.9 parts by mass of a flash rust inhibitor into a blanking box of the mixing drum machine in advance, starting the mixing drum machine, carrying out reciprocating rolling on the water-based epoxy resin composite coating for 5-10 minutes, opening a blanking opening of the blanking box while rolling, slowly dropping the 4.8-10.9 parts by mass of the flash rust inhibitor into the water-based epoxy resin composite coating for 3-5 minutes, so that the flash rust inhibitor can be blanked while rolling, repeatedly fusing in the water-based epoxy resin composite coating, improving the mixing uniformity and finally preparing the water-based epoxy resin composite coating;
and S6, slowly pouring the water-based epoxy resin composite coating into a screening machine, and recycling the solid in the water-based epoxy resin composite coating after screening, so that the purity of the water-based epoxy resin composite coating can be improved.
And S7, quantitatively barreling the prepared water-based epoxy resin composite coating.
Example 2
A preparation process of a water-based epoxy resin composite coating is shown in figure 1, and comprises the following specific steps:
s1, respectively pouring 27 parts by mass of waterborne epoxy resin, 5 parts by mass of curing agent, 1.3 parts by mass of light calcium carbonate and 2.4 parts by mass of gas-phase nano SiO2 into a reactor A, heating for 0.5-2h, mechanically stirring for 10 min, continuously adding 2.5 parts by mass of waterborne defoamer, 2.2 parts by mass of waterborne dispersant and 2.6 parts by mass of flexibilizer, continuously mechanically stirring for 10-80 min, adding the raw materials in batches, and stirring for several minutes after adding several raw materials each time, so that the raw materials can be mixed more fully, and the probability of generating particulate matters is reduced.
S2, preparing modified graphene oxide:
c1, ball milling and proportioning:
ball-milling graphene oxide into nano powder for 10-30 minutes, wherein the ball-milling time is 2 parts by mass of the powdered graphene oxide, 4 parts by mass of isopropanol, 0.3 part by mass of aluminum ethoxide and 20 parts by mass of distilled water;
c2, adding isopropanol:
pouring 3 parts by mass of isopropanol into a reactor B, dispersing powdered graphene oxide into the isopropanol, performing ultrasonic dispersion for 0.6-4 h at normal temperature, and stirring and dispersing uniformly to obtain a solution, wherein the concentration of the graphene oxide in the isopropanol is 7 mg/mL;
c3, adding aluminum ethoxide:
continuously adding 0.3 mass part of aluminum ethoxide, wherein the adding amount of the aluminum ethoxide is 1-6mol%, and stirring for 10-30 minutes to obtain a modified graphene oxide dispersion liquid;
c4, reaction:
discharging the gas in the reactor B by using a gas displacement technology, discharging carbon dioxide, stirring and reacting at the pressure of 3-6MPa and the temperature of 50-100 ℃, wherein the reaction time is 5-12h, and cooling to room temperature after the reaction is finished;
c5, washing with water:
and after slowly removing the gas, filtering to remove the catalyst and the solvent, and centrifugally washing to obtain 1.3-6.4 parts by mass of modified graphene oxide.
S3, adding 1.3-6.4 parts by mass of modified graphene oxide, continuously stirring, so that the corrosion resistance and the adhesive force of the water-based epoxy resin composite coating can be improved, then adding 2.2-3.6 parts by mass of an adhesive force promoter, further improving the adhesive force of the water-based epoxy resin composite coating, 1.6-2.5 parts by mass of a film-forming assistant and 1.6-2.1 parts by mass of a water-based flatting agent, and then mechanically stirring for 0.5-1.5 hours to prepare the water-based epoxy resin composite coating; (ii) a
S4, preparing a flash rust inhibitor:
a1, preparation of raw materials:
weighing 3kg of ammonium molybdate, 3kg of ammonium benzoate, 10kg of polyaniline aqueous liquid and 90kg of deionized water for later use;
a2, stirring raw materials:
adding 90kg of deionized water into a stirrer, adding 3kg of ammonium molybdate and 3kg of ammonium benzoate, standing for 30 minutes, controlling the stirring speed of the stirrer within 300-500r/min, uniformly mixing when the stirring time is 30 minutes, adding 3kg of polyaniline aqueous liquid, continuously stirring for 10 minutes, adding 4kg of polyaniline aqueous liquid, continuously stirring for 10 minutes, finally adding 3kg of polyaniline aqueous liquid, and finally stirring for 30-60 minutes to prepare green semitransparent liquid, namely the composite flash rust inhibitor, wherein the pH value of the composite flash rust inhibitor is 9.0, the solid content of the composite flash rust inhibitor is 11.9%, and the mass parts of the composite flash rust inhibitor are 4.8-10.9.
S5, pouring the water-based epoxy resin composite coating into a mixing drum machine, putting 4.8-10.9 parts by mass of a flash rust inhibitor into a blanking box of the mixing drum machine in advance, starting the mixing drum machine, carrying out reciprocating rolling on the water-based epoxy resin composite coating for 5-10 minutes, opening a blanking opening of the blanking box while rolling, slowly dropping the 4.8-10.9 parts by mass of the flash rust inhibitor into the water-based epoxy resin composite coating for 3-5 minutes, so that the flash rust inhibitor can be blanked while rolling, repeatedly fusing in the water-based epoxy resin composite coating, improving the mixing uniformity and finally preparing the water-based epoxy resin composite coating;
and S6, slowly pouring the water-based epoxy resin composite coating into a screening machine, and recycling the solid in the water-based epoxy resin composite coating after screening, so that the purity of the water-based epoxy resin composite coating can be improved.
And S7, quantitatively barreling the prepared water-based epoxy resin composite coating.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A preparation process of a water-based epoxy resin composite coating is characterized in that the water-based epoxy resin composite coating is composed of the following raw material medicaments by weight:
2. the preparation process of the water-based epoxy resin composite coating according to claim 1, which is characterized by comprising the following steps:
s1, respectively pouring 20-38 parts by mass of waterborne epoxy resin, 3-7 parts by mass of a curing agent, 0.8-1.6 parts by mass of light calcium carbonate and 1.4-2.7 parts by mass of gas-phase nano SiO2 into a reactor A, heating for 0.5-2h, mechanically stirring for 10 minutes, continuously adding 2.1-2.9 parts by mass of a waterborne defoaming agent, 1.6-2.6 parts by mass of a waterborne dispersing agent and 2.1-3.4 parts by mass of a toughening agent, and continuously mechanically stirring for 10-80 minutes;
s2, preparing modified graphene oxide;
s3, adding 1.3-6.4 parts by mass of modified graphene oxide, continuously stirring, then adding 2.2-3.6 parts by mass of adhesion promoter, 1.6-2.5 parts by mass of film-forming assistant and 1.6-2.1 parts by mass of aqueous flatting agent, and mechanically stirring for 0.5-1.5 hours to prepare the aqueous epoxy resin composite coating;
s4, preparing a flash rust inhibitor;
s5, pouring the water-based epoxy resin composite coating into a mixing roller machine, putting 4.8-10.9 parts by mass of a flash rust inhibitor into a blanking box of the mixing roller machine in advance, starting the mixing roller machine, carrying out reciprocating rolling on the water-based epoxy resin composite coating for 5-10 minutes, opening a blanking port of the blanking box while rolling, and slowly dropping the 4.8-10.9 parts by mass of the flash rust inhibitor into the water-based epoxy resin composite coating for 3-5 minutes to prepare the water-based epoxy resin composite coating;
s6, slowly pouring the water-based epoxy resin composite coating into a screening machine, and screening and recycling solids in the water-based epoxy resin composite coating;
and S7, quantitatively barreling the prepared water-based epoxy resin composite coating.
3. The preparation process of the water-based epoxy resin composite coating according to claim 2, which is characterized in that in S2, the steps are as follows:
c1, ball milling and proportioning:
ball-milling graphene oxide into nano powder for 10-30 minutes, and preparing 1.1-2.3 parts by mass of powdered graphene oxide, 1-5 parts by mass of alcohol solvent, 0.1-0.5 part by mass of catalyst and 10-25 parts by mass of distilled water;
c2, adding an alcohol solvent:
pouring 1-5 parts by mass of an alcohol solvent into the reactor B, dispersing the powdered graphene oxide in the alcohol solvent, ultrasonically dispersing for 0.6-4 h at normal temperature, and uniformly stirring and dispersing to obtain a solution;
c3, adding a catalyst:
continuously adding the catalyst, wherein the adding amount of the catalyst is 1-6mol%, and stirring for 10-30 minutes to obtain a modified graphene oxide dispersion liquid;
c4, reaction:
discharging the gas in the reactor B by using a gas replacement technology, discharging carbon dioxide, stirring and reacting at 50-100 ℃ under the pressure of 3-6MPa for 5-12h, and cooling to room temperature after the reaction is finished;
c5, washing with water:
and slowly exhausting the gas, filtering to remove the catalyst and the solvent, and centrifugally washing to obtain 1.3-6.4 parts by mass of modified graphene oxide.
4. The preparation process of the waterborne epoxy resin composite coating according to claim 3, wherein the alcohol solvent is ethanol or isopropanol, and the catalyst is aluminum ethoxide, aluminum isopropoxide and aluminum n-butoxide.
5. The preparation process of the water-based epoxy resin composite coating according to claim 3, wherein the concentration of the graphene oxide in the alcohol solvent is 7mg/mL.
6. The preparation process of the water-based epoxy resin composite coating according to claim 2, wherein in S3, the flash rust inhibitor is prepared by the following steps:
a1, preparation of raw materials:
weighing 3kg of ammonium molybdate, 3kg of ammonium benzoate, 10kg of polyaniline aqueous liquid and 90kg of deionized water for later use;
a2, stirring raw materials:
adding 90kg of deionized water into a stirrer, adding 3kg of ammonium molybdate and 3kg of ammonium benzoate, controlling the stirring speed of the stirrer within 300-500r/min, uniformly mixing when the stirring time is 30 minutes, adding 3kg of polyaniline aqueous liquid, continuing to stir for 10 minutes, adding 4kg of polyaniline aqueous liquid, continuing to stir for 10 minutes, finally adding 3kg of polyaniline aqueous liquid, and finally stirring for 30-60 minutes to prepare green semitransparent liquid, namely the composite flash rust inhibitor.
7. The preparation process of the water-based epoxy resin composite coating according to claim 6, wherein the pH value of the composite flash rust inhibitor is 9.0, the solid content is 11.9%, and the mass part is 4.8-10.9.
8. The process according to claim 6, wherein in A2, 90kg of deionized water, 3kg of ammonium molybdate and 3kg of ammonium benzoate are left for 30 minutes before stirring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310015985.4A CN115926578A (en) | 2023-01-06 | 2023-01-06 | Preparation process of water-based epoxy resin composite coating |
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