CN113881311A - Water-based bi-component epoxy anticorrosive paint and preparation method thereof - Google Patents
Water-based bi-component epoxy anticorrosive paint and preparation method thereof Download PDFInfo
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- CN113881311A CN113881311A CN202111150231.7A CN202111150231A CN113881311A CN 113881311 A CN113881311 A CN 113881311A CN 202111150231 A CN202111150231 A CN 202111150231A CN 113881311 A CN113881311 A CN 113881311A
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- 239000004593 Epoxy Substances 0.000 title claims abstract description 81
- 239000003973 paint Substances 0.000 title claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 43
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 42
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002002 slurry Substances 0.000 claims abstract description 35
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 239000002270 dispersing agent Substances 0.000 claims abstract description 18
- 239000002562 thickening agent Substances 0.000 claims abstract description 18
- 239000003822 epoxy resin Substances 0.000 claims abstract description 16
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 16
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 9
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims description 28
- 239000002994 raw material Substances 0.000 claims description 16
- IBLKWZIFZMJLFL-UHFFFAOYSA-N 1-phenoxypropan-2-ol Chemical compound CC(O)COC1=CC=CC=C1 IBLKWZIFZMJLFL-UHFFFAOYSA-N 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 14
- 229910021485 fumed silica Inorganic materials 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- 239000013522 chelant Substances 0.000 claims description 2
- 239000003112 inhibitor Substances 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 230000003449 preventive effect Effects 0.000 claims description 2
- 235000010288 sodium nitrite Nutrition 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 239000005416 organic matter Substances 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 39
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 32
- 238000005507 spraying Methods 0.000 description 21
- 239000008367 deionised water Substances 0.000 description 17
- 229910021641 deionized water Inorganic materials 0.000 description 17
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 16
- 239000006228 supernatant Substances 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 11
- 239000011259 mixed solution Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 10
- 238000001914 filtration Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000001035 drying Methods 0.000 description 7
- 229910002804 graphite Inorganic materials 0.000 description 7
- 239000010439 graphite Substances 0.000 description 7
- 239000012286 potassium permanganate Substances 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 239000005457 ice water Substances 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 6
- 238000009210 therapy by ultrasound Methods 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 125000000524 functional group Chemical group 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004841 bisphenol A epoxy resin Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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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
-
- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
-
- 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a water-based bi-component epoxy anticorrosive paint and a preparation method thereof. The water-based bi-component epoxy anticorrosive paint is composed of a component A and a component B, wherein the component A is composed of zinc powder, a film-forming aid, a dispersing agent, a thickening agent, an anti-settling agent and a curing agent, the component B is composed of epoxy resin, graphene oxide slurry, an anti-flash rust agent and water, and the mass ratio of the component A to the component B is 0.8: 1-1.5: 1. The aqueous bi-component epoxy anticorrosive paint has the characteristics of low zinc powder content, low volatile organic matter content, simple preparation process and the like, and the formed coating has excellent anticorrosive performance, high density, large adhesive force and excellent impact resistance, and is suitable for large-scale production and application.
Description
Technical Field
The invention relates to the technical field of metal corrosion prevention, in particular to a water-based bi-component epoxy anticorrosive paint and a preparation method thereof.
Background
The metal corrosion refers to the phenomenon that a metal material is damaged by the action of surrounding media (such as moisture, chemical substances and the like) in the use process, and the mechanical property is reduced and the service life is shortened. At present, the prevention of corrosion damage to metal substrates by applying corrosion-inhibiting coatings to metal surfaces is one of the most cost-effective and easy to implement corrosion-inhibiting methods.
The epoxy zinc-rich paint is an anticorrosive paint with excellent corrosion resistance. The zinc powder in the epoxy zinc-rich paint not only can play a role in sacrificial anode cathode protection, but also can play a role in corrosion inhibition of corrosion products of the zinc powder. When the existing epoxy zinc-rich paint is actually used, the cathode protection effect of the zinc powder can be fully exerted only by adding higher-content zinc powder (the content of the zinc powder in nonvolatile components exceeds 60 percent and even reaches 80 percent). However, since zinc powder is liable to be precipitated, an excessively high content thereof causes a significant decrease in the storage stability of the coating and also causes a decrease in the denseness of the coating, and in addition, the use of a large amount of zinc powder in the production process of the coating also tends to generate zinc mist, which is a great hazard to the health of operators.
Therefore, the development of the epoxy anticorrosive paint with low zinc powder content and excellent anticorrosive performance has very important significance.
Disclosure of Invention
The invention aims to provide a water-based two-component epoxy anticorrosive paint and a preparation method thereof.
The technical scheme adopted by the invention is as follows:
a water-based two-component epoxy anticorrosive paint is composed of a component A and a component B:
the component A comprises the following raw materials in parts by mass:
zinc powder: 20-40 parts;
film-forming auxiliary agent: 10-15 parts;
dispersing agent: 0.2 to 0.8 portion;
thickening agent: 0.4 to 0.8 portion;
anti-settling agent: 0.5 to 1 portion;
curing agent: 5-10 parts;
the component B comprises the following raw materials in parts by mass:
epoxy resin: 20-50 parts of a solvent;
graphene oxide slurry: 1-5 parts;
flash rust preventive: 0.1 to 0.5 portion;
water: 12-15 parts;
the mass ratio of the component A to the component B is 0.8: 1-1.5: 1.
Preferably, the zinc powder is spherical and has a particle size of 18 to 23 μm.
Preferably, the film-forming aid is at least one of propylene glycol methyl ether and propylene glycol phenyl ether.
Preferably, the dispersant is a polymeric nonionic dispersant.
More preferably, the dispersant is at least one of ADDITOL-VXW 6208/60 and ADDITOL-VXW 6503.
Still more preferably, the dispersant is ADDITOL-VXW 6208/60, a highly new material in the United states.
Preferably, the thickener is at least one of nonionic polyurethane thickener and polyamide wax.
Further preferably, the thickener is at least one of TEGO Visco plus 3060, MT 6650 from Taiyuan Mei Te Xiang science and technology Co.
Still more preferably, the thickener is MT 6650 from Taiyuan Meite Xiang technology Co.
Preferably, the anti-settling agent is fumed silica.
Preferably, the curing agent is a room temperature curing type aqueous amine curing agent.
Further preferably, the curing agent is at least one of EPIKURE8538-Y-68, Vast-Send, and EPIKURE 8545-W-52.
Still further preferably, the curing agent is EPIKURE8538-Y-68, Vast.
Preferably, the epoxy resin is bisphenol A epoxy resin, and the epoxy equivalent is 500g/eq to 600 g/eq.
Further preferably, the epoxy resin is Epikote6520-WH-53A, Vast.
Preferably, the graphene oxide slurry is prepared by a modified Hummers method.
Further preferably, the graphene oxide slurry is prepared by the following method: placing the concentrated sulfuric acid-concentrated phosphoric acid mixed solution in an ice water bath, adding graphite, stirring, adding potassium permanganate, carrying out oxidation reaction at the temperature of 35-50 ℃, adding water, stirring at the temperature of 90-95 ℃, adding a hydrogen peroxide solution, stirring, washing with water, standing, removing a supernatant, centrifuging, removing a supernatant, adding water to a lower layer slurry for dispersion, and carrying out ultrasound to obtain the graphene oxide slurry.
Preferably, the mass ratio of the graphite to the potassium permanganate is 1: 1-1: 6.
Preferably, the time of the oxidation reaction is 20min to 100 min.
Preferably, the power of the ultrasound is 200W to 300W.
Preferably, the time of the ultrasonic treatment is 30min to 60 min.
Preferably, the concentration of the graphene oxide slurry is 8 mg/mL-12 mg/mL.
Preferably, the flash rust inhibitor is at least one of organic zinc chelate and sodium nitrite.
Further preferably, the anti-flash rust agent is ASCOTRAN-H14 from ASCOTEC.
The preparation method of the waterborne two-component epoxy anticorrosive paint comprises the following steps: uniformly mixing zinc powder, a film forming aid, a dispersing agent, a thickening agent, an anti-settling agent and a curing agent to prepare a component A, uniformly mixing epoxy resin, graphene oxide slurry, an anti-flash rust agent and water to prepare a component B, and subpackaging to obtain the aqueous bi-component epoxy anticorrosive paint.
Preferably, the preparation method of the waterborne two-component epoxy anticorrosive paint comprises the following steps: adding zinc powder, a film forming aid, a dispersing agent, a thickening agent, an anti-settling agent and a curing agent into a stirrer I, adjusting the rotating speed of the stirrer to 800-1200 r/min, stirring for 20-30 min to obtain a component A, adding epoxy resin, graphene oxide slurry, an anti-flash rust agent and water into a stirrer II, adjusting the rotating speed of the stirrer to 800-1200 r/min, stirring for 5-8 min to obtain a component B, and subpackaging to obtain the water-based bi-component epoxy anticorrosive paint.
The application method of the waterborne two-component epoxy anticorrosive paint comprises the following steps: and adding the component A and the component B into a stirrer according to the proportion, adjusting the rotating speed of the stirrer to 800-1000 r/min, stirring for 3-7 min, filtering by using 200-mesh gauze, adding water to adjust the viscosity of the coating to be 10-15 s for coating three cups, and then spraying.
Preferably, the pressure of the spray gun for spraying is 0.4 MPa-0.8 MPa, the spraying distance is 30 cm-50 cm, and the thickness of a paint film is 75 mu m-100 mu m.
The invention has the beneficial effects that: the aqueous bi-component epoxy anticorrosive paint has the characteristics of low zinc powder content, low volatile organic matter content, simple preparation process and the like, and the formed coating has excellent anticorrosive performance, high density, large adhesive force and excellent impact resistance, and is suitable for large-scale production and application.
Specifically, the method comprises the following steps:
1) the graphene oxide slurry is added into the aqueous bi-component epoxy anticorrosive paint, the compatibility of the graphene oxide slurry with an epoxy anticorrosive paint system is good, the blocking effect of a graphene oxide sheet layer can be better exerted, the anticorrosive performance of a formed coating can be remarkably improved, the salt spray resistant time of the coating exceeds 1500h, and the impedance value can be improved by 1 order of magnitude;
2) the graphene oxide slurry prepared by the improved Hummers method is added into the aqueous bi-component epoxy anticorrosive paint, so that the operations such as filtering, drying, grinding and the like are not required, the production process of graphene oxide is greatly simplified, and the problem that the powder is easy to float in the air and harm the health of production personnel due to the direct use of the graphene powder/graphene oxide powder/modified graphene oxide powder is also avoided;
3) the water-based bi-component epoxy anticorrosive paint has low zinc powder content and low cost, and the formed coating has high compactness, good corrosion resistance and high adhesive force;
4) the water-based bi-component epoxy anticorrosive paint disclosed by the invention is low in volatile organic matter content, safe and environment-friendly.
Drawings
FIG. 1 is an appearance picture of the epoxy anticorrosive paint film obtained in examples 1-3 after resisting neutral salt fog for 720 h.
FIG. 2 is an appearance picture of the epoxy anticorrosive paint film obtained in comparative examples 1-3 after resisting neutral salt fog for 720 h.
Detailed Description
The invention will be further explained and illustrated with reference to specific examples.
Example 1:
a water-based two-component epoxy anticorrosive paint is composed of a component A and a component B:
the component A comprises the following raw materials in parts by mass:
zinc powder (spherical, particle size 18-23 μm): 25.73 parts;
propylene glycol methyl ether (coalescent): 9.62 parts;
propylene glycol phenyl ether (coalescent): 2.40 parts;
ADDITOL-VXW 6208/60 (dispersant): 0.48 part;
MT 6650 (thickener): 0.64 part;
fumed silica (anti-settling agent): 0.80 part;
EPIKURE8538-Y-68 (curing agent): 8.50 parts;
the component B comprises the following raw materials in parts by mass:
epikote6520-WH-53A (bisphenol A type epoxy resin, epoxy equivalent 500 g/eq-600 g/eq): 36.07 parts of a solvent;
graphene oxide slurry: 1.02 parts;
ASCOTRAN-H14 (antiscratch agent): 0.26 part;
deionized water: 14.43 parts.
The preparation method of the waterborne two-component epoxy anticorrosive paint comprises the following steps:
1) mixing 90mL of 98 mass percent concentrated sulfuric acid and 10mL of 85 mass percent concentrated phosphoric acid to prepare a concentrated sulfuric acid-concentrated phosphoric acid mixed solution, then placing the concentrated sulfuric acid-concentrated phosphoric acid mixed solution in an ice water bath, adding 2g of graphite, stirring for 30min, adding 6g of potassium permanganate, oxidizing for 30min at 50 ℃, adding 200mL of deionized water, stirring for 15min at 95 ℃, adding 30mL of 30 mass percent hydrogen peroxide solution, stirring for 15min, washing with water, standing for 48h, removing supernatant, centrifuging for 5 times at a rotation speed of 10000r/min, removing supernatant, adding water to lower-layer slurry for dispersing, and performing ultrasonic treatment at an ultrasonic power of 250W for 60min to obtain graphene oxide slurry (the concentration is 10 mg/mL);
2) adding zinc powder, propylene glycol methyl ether, propylene glycol phenyl ether, ADDITOL-VXW 6208/60, MT 6650, fumed silica and EPIKURE8538-Y-68 into a stirrer I, adjusting the rotation speed of the stirrer to 800r/min, and stirring for 20min to obtain a component A;
3) adding Epikote6520-WH-53A, graphene oxide slurry, ASCODAN-H14 and deionized water into a stirrer II, adjusting the rotating speed of the stirrer to 800r/min, stirring for 5min to obtain a component B, and subpackaging to obtain the water-based double-component epoxy anticorrosive paint.
The application method of the waterborne two-component epoxy anticorrosive paint comprises the following steps: adding the component A and the component B into a stirrer according to the mass ratio of 0.93:1, adjusting the rotating speed of the stirrer to 1000r/min, stirring for 3min, filtering with 200-mesh gauze, adding water to adjust the viscosity of the coating to three cups for 12s, spraying with the pressure of a spraying gun of 0.4MPa and the spraying distance of 30cm, and drying to obtain the epoxy anticorrosive paint film (the thickness is 90 mu m +/-10 mu m).
Example 2:
a water-based two-component epoxy anticorrosive paint is composed of a component A and a component B:
the component A comprises the following raw materials in parts by mass:
zinc powder (spherical, particle size 18-23 μm): 25.21 parts;
propylene glycol methyl ether (coalescent): 9.42 parts;
propylene glycol phenyl ether (coalescent): 2.36 parts;
ADDITOL-VXW 6208/60 (dispersant): 0.47 part;
MT 6650 (thickener): 0.63 part;
fumed silica (anti-settling agent): 0.79 portion;
EPIKURE8538-Y-68 (curing agent): 8.32 parts;
the component B comprises the following raw materials in parts by mass:
epikote6520-WH-53A (bisphenol A type epoxy resin, epoxy equivalent 500 g/eq-600 g/eq): 35.34 parts of a binder;
graphene oxide slurry: 3.03 parts;
ASCOTRAN-H14 (antiscratch agent): 0.16 part;
deionized water: 14.14 parts.
The preparation method of the waterborne two-component epoxy anticorrosive paint comprises the following steps:
1) mixing 90mL of 98 mass percent concentrated sulfuric acid and 10mL of 85 mass percent concentrated phosphoric acid to prepare a concentrated sulfuric acid-concentrated phosphoric acid mixed solution, then placing the concentrated sulfuric acid-concentrated phosphoric acid mixed solution in an ice water bath, adding 2g of graphite, stirring for 30min, adding 6g of potassium permanganate, oxidizing for 30min at 50 ℃, adding 200mL of deionized water, stirring for 15min at 95 ℃, adding 30mL of 30 mass percent hydrogen peroxide solution, stirring for 15min, washing with water, standing for 48h, removing supernatant, centrifuging for 5 times at the rotation speed of 10000r/min, removing supernatant, adding water to lower-layer slurry for dispersing, and performing ultrasonic treatment at the ultrasonic power of 250W for 30min to obtain graphene oxide slurry (the concentration of 10 mg/mL);
2) adding zinc powder, propylene glycol methyl ether, propylene glycol phenyl ether, ADDITOL-VXW 6208/60, MT 6650, fumed silica and EPIKURE8538-Y-68 into a stirrer I, adjusting the rotation speed of the stirrer to 1000r/min, and stirring for 30min to obtain a component A;
3) adding Epikote6520-WH-53A, graphene oxide slurry, ASCODAN-H14 and deionized water into a stirrer II, adjusting the rotating speed of the stirrer to 1000r/min, stirring for 5min to obtain a component B, and subpackaging to obtain the water-based double-component epoxy anticorrosive paint.
The application method of the waterborne two-component epoxy anticorrosive paint comprises the following steps: adding the component A and the component B into a stirrer according to the mass ratio of 0.90:1, adjusting the rotating speed of the stirrer to 1000r/min, stirring for 3min, filtering with 200-mesh gauze, adding water to adjust the viscosity of the coating to three cups for 12s, spraying with the pressure of a spraying gun of 0.8MPa and the spraying distance of 50cm, and drying to obtain the epoxy anticorrosive paint film (the thickness is 90 mu m +/-10 mu m).
Example 3:
a water-based two-component epoxy anticorrosive paint is composed of a component A and a component B:
the component A comprises the following raw materials in parts by mass:
zinc powder (spherical, particle size 18-23 μm): 33.34 parts of;
propylene glycol methyl ether (coalescent): 8.31 parts of;
propylene glycol phenyl ether (coalescent): 2.08 parts of a mixture;
ADDITOL-VXW 6208/60 (dispersant): 0.42 part;
MT 6650 (thickener): 0.55 part;
fumed silica (anti-settling agent): 0.69 part;
EPIKURE8538-Y-68 (curing agent): 7.34 parts of;
the component B comprises the following raw materials in parts by mass:
epikote6520-WH-53A (bisphenol A type epoxy resin, epoxy equivalent 500 g/eq-600 g/eq): 31.16 parts;
graphene oxide slurry: 3.32 parts;
ASCOTRAN-H14 (antiscratch agent): 0.28 part;
deionized water: 12.46 parts.
The preparation method of the waterborne two-component epoxy anticorrosive paint comprises the following steps:
1) mixing 90mL of 98 mass percent concentrated sulfuric acid and 10mL of 85 mass percent concentrated phosphoric acid to prepare a concentrated sulfuric acid-concentrated phosphoric acid mixed solution, then placing the concentrated sulfuric acid-concentrated phosphoric acid mixed solution in an ice water bath, adding 2g of graphite, stirring for 30min, adding 6g of potassium permanganate, oxidizing for 30min at 50 ℃, adding 200mL of deionized water, stirring for 15min at 95 ℃, adding 30mL of 30 mass percent hydrogen peroxide solution, stirring for 15min, washing with water, standing for 48h, removing supernatant, centrifuging for 5 times at the rotation speed of 10000r/min, removing supernatant, adding water to lower-layer slurry for dispersing, and performing ultrasonic treatment at the ultrasonic power of 250W for 30min to obtain graphene oxide slurry (the concentration of 10 mg/mL);
2) adding zinc powder, propylene glycol methyl ether, propylene glycol phenyl ether, ADDITOL-VXW 6208/60, MT 6650, fumed silica and EPIKURE8538-Y-68 into a stirrer I, adjusting the rotation speed of the stirrer to 1000r/min, and stirring for 30min to obtain a component A;
3) adding Epikote6520-WH-53A, graphene oxide slurry, ASCODAN-H14 and deionized water into a stirrer II, adjusting the rotating speed of the stirrer to 1000r/min, stirring for 5min to obtain a component B, and subpackaging to obtain the water-based double-component epoxy anticorrosive paint.
The application method of the waterborne two-component epoxy anticorrosive paint comprises the following steps: adding the component A and the component B into a stirrer according to the mass ratio of 1.11:1, adjusting the rotating speed of the stirrer to 1000r/min, stirring for 3min, filtering with 200-mesh gauze, adding water to adjust the viscosity of the coating to three cups for 12s, spraying with the pressure of a spraying gun of 0.8MPa and the spraying distance of 50cm, and drying to obtain the epoxy anticorrosive paint film (the thickness is 90 mu m +/-10 mu m).
Comparative example 1:
a water-based two-component epoxy anticorrosive paint is composed of a component A and a component B:
the component A comprises the following raw materials in parts by mass:
zinc powder (spherical, particle size 18-23 μm): 25.73 parts;
propylene glycol methyl ether (coalescent): 9.62 parts;
propylene glycol phenyl ether (coalescent): 2.40 parts;
ADDITOL-VXW 6208/60 (dispersant): 0.48 part;
MT 6650 (thickener): 0.64 part;
fumed silica (anti-settling agent): 0.80 part;
EPIKURE8538-Y-68 (curing agent): 8.50 parts;
the component B comprises the following raw materials in parts by mass:
epikote6520-WH-53A (bisphenol A type epoxy resin, epoxy equivalent 500 g/eq-600 g/eq): 36.07 parts of a solvent;
graphene oxide slurry: 1.03 parts;
ASCOTRAN-H14 (antiscratch agent): 0.26 part;
deionized water: 14.43 parts.
The preparation method of the waterborne two-component epoxy anticorrosive paint comprises the following steps:
1) mixing 90mL of 98 mass percent concentrated sulfuric acid and 10mL of 85 mass percent concentrated phosphoric acid to prepare a concentrated sulfuric acid-concentrated phosphoric acid mixed solution, then placing the concentrated sulfuric acid-concentrated phosphoric acid mixed solution in an ice water bath, adding 2g of graphite, stirring for 30min, adding 6g of potassium permanganate, oxidizing for 120min at 50 ℃, adding 200mL of deionized water, stirring for 15min at 95 ℃, adding 30mL of 30 mass percent hydrogen peroxide solution, stirring for 15min, washing with water, standing for 48h, removing supernatant, centrifuging for 5 times at the rotation speed of 10000r/min, removing supernatant, adding water to lower-layer slurry for dispersing, and performing ultrasonic treatment at the ultrasonic power of 250W for 60min to obtain graphene oxide slurry (the concentration of 10 mg/mL);
2) adding zinc powder, propylene glycol methyl ether, propylene glycol phenyl ether, ADDITOL-VXW 6208/60, MT 6650, fumed silica and EPIKURE8538-Y-68 into a stirrer I, adjusting the rotation speed of the stirrer to 800r/min, and stirring for 20min to obtain a component A;
3) adding Epikote6520-WH-53A, graphene oxide slurry, ASCODAN-H14 and deionized water into a stirrer II, adjusting the rotating speed of the stirrer to 800r/min, stirring for 5min to obtain a component B, and subpackaging to obtain the water-based double-component epoxy anticorrosive paint.
The application method of the waterborne two-component epoxy anticorrosive paint comprises the following steps: adding the component A and the component B into a stirrer according to the mass ratio of 0.93:1, adjusting the rotating speed of the stirrer to 1000r/min, stirring for 3min, filtering with 200-mesh gauze, adding water to adjust the viscosity of the coating to three cups for 12s, spraying with the pressure of a spraying gun of 0.4MPa and the spraying distance of 30cm, and drying to obtain the epoxy anticorrosive paint film (the thickness is 90 mu m +/-10 mu m).
Comparative example 2:
a water-based two-component epoxy anticorrosive paint is composed of a component A and a component B:
the component A comprises the following raw materials in parts by mass:
zinc powder (spherical, particle size 18-23 μm): 25.44 parts;
propylene glycol methyl ether (coalescent): 9.51 parts;
propylene glycol phenyl ether (coalescent): 2.38 parts of;
ADDITOL-VXW 6208/60 (dispersant): 0.48 part;
MT 6650 (thickener): 0.63 part;
fumed silica (anti-settling agent): 0.79 portion;
EPIKURE8538-Y-68 (curing agent): 8.40 parts;
the component B comprises the following raw materials in parts by mass:
epikote6520-WH-53A (bisphenol A type epoxy resin, epoxy equivalent 500 g/eq-600 g/eq): 35.67 parts;
ASCOTRAN-H14 (antiscratch agent): 0.25 part;
deionized water: 16.45 parts.
The preparation method of the waterborne two-component epoxy anticorrosive paint comprises the following steps:
1) adding zinc powder, propylene glycol methyl ether, propylene glycol phenyl ether, ADDITOL-VXW 6208/60, MT 6650, fumed silica and EPIKURE8538-Y-68 into a stirrer I, adjusting the rotation speed of the stirrer to 1000r/min, and stirring for 20min to obtain a component A;
2) adding Epikote6520-WH-53A, ASCOTRAN-H14 and deionized water into a stirrer II, adjusting the rotating speed of the stirrer to 1000r/min, stirring for 5min to obtain a component B, and subpackaging to obtain the water-based two-component epoxy anticorrosive paint.
The application method of the waterborne two-component epoxy anticorrosive paint comprises the following steps: adding the component A and the component B into a stirrer according to the mass ratio of 0.91:1, adjusting the rotating speed of the stirrer to 1000r/min, stirring for 3min, filtering with 200-mesh gauze, adding water to adjust the viscosity of the coating to three cups for 12s, spraying with the pressure of a spraying gun of 0.5MPa and the spraying distance of 40cm, and drying to obtain the epoxy anticorrosive paint film (the thickness is 90 mu m +/-10 mu m).
Comparative example 3:
a water-based two-component epoxy anticorrosive paint is composed of a component A and a component B:
the component A comprises the following raw materials in parts by mass:
zinc powder (spherical, particle size 18-23 μm): 58.13 parts;
propylene glycol methyl ether (coalescent): 5.43 parts;
propylene glycol phenyl ether (coalescent): 1.36 parts;
ADDITOL-VXW 6208/60 (dispersant): 0.27 part;
MT 6650 (thickener): 0.36 part;
fumed silica (anti-settling agent): 0.45 part;
EPIKURE8538-Y-68 (curing agent): 4.80 parts;
the component B comprises the following raw materials in parts by mass:
epikote6520-WH-53A (bisphenol A type epoxy resin, epoxy equivalent 500 g/eq-600 g/eq): 20.37 parts of a binder;
graphene oxide slurry: 4.36 parts;
ASCOTRAN-H14 (antiscratch agent): 0.36 part;
deionized water: 4.07 parts.
The preparation method of the waterborne two-component epoxy anticorrosive paint comprises the following steps:
1) mixing 90mL of 98 mass percent concentrated sulfuric acid and 10mL of 85 mass percent concentrated phosphoric acid to prepare a concentrated sulfuric acid-concentrated phosphoric acid mixed solution, then placing the concentrated sulfuric acid-concentrated phosphoric acid mixed solution in an ice water bath, adding 2g of graphite, stirring for 30min, adding 6g of potassium permanganate, oxidizing for 30min at 50 ℃, adding 200mL of deionized water, stirring for 15min at 95 ℃, adding 30mL of 30 mass percent hydrogen peroxide solution, stirring for 15min, washing with water, standing for 48h, removing supernatant, centrifuging for 5 times at a rotation speed of 10000r/min, removing supernatant, adding water to lower-layer slurry for dispersing, and performing ultrasonic treatment at an ultrasonic power of 250W for 60min to obtain graphene oxide slurry (the concentration is 10 mg/mL);
2) adding zinc powder, propylene glycol methyl ether, propylene glycol phenyl ether, ADDITOL-VXW 6208/60, MT 6650, fumed silica and EPIKURE8538-Y-68 into a stirrer I, adjusting the rotation speed of the stirrer to 1000r/min, and stirring for 30min to obtain a component A;
3) adding Epikote6520-WH-53A, graphene oxide slurry, ASCODAN-H14 and deionized water into a stirrer II, adjusting the rotating speed of the stirrer to 1000r/min, stirring for 5min to obtain a component B, and subpackaging to obtain the water-based double-component epoxy anticorrosive paint.
The application method of the waterborne two-component epoxy anticorrosive paint comprises the following steps: adding the component A and the component B into a stirrer according to the mass ratio of 2.43:1, adjusting the rotating speed of the stirrer to 1000r/min, stirring for 3min, filtering with 200-mesh gauze, adding water to adjust the viscosity of the coating to three cups for 12s, spraying with the pressure of a spraying gun of 0.6MPa and the spraying distance of 40cm, and drying to obtain the epoxy anticorrosive paint film (the thickness is 90 mu m +/-10 mu m).
And (3) performance testing:
the performance tests of the epoxy anticorrosive paint films obtained in the examples 1 to 3 and the comparative examples 1 to 3 are carried out, the test results are shown in table 1, the appearance pictures of the epoxy anticorrosive paint films obtained in the examples 1 to 3 after resisting neutral salt fog for 720h are shown in fig. 1 (A, B and C in the figure correspond to the examples 1 to 3 in sequence), and the appearance pictures of the epoxy anticorrosive paint films obtained in the comparative examples 1 to 3 after resisting neutral salt fog for 720h are shown in fig. 2 (A, B and C in the figure correspond to the comparative examples 1 to 3 in sequence):
TABLE 1 Performance test results for epoxy anti-corrosion paint films
Note:
pencil hardness: the test is carried out according to the' GB/T6739-;
adhesion force: the test was carried out with reference to the "GB/T9286-1998 test for the marking of paint films and of varnishes";
impact resistance: the test is carried out according to GB/T1732-1993 paint film impact resistance test method;
neutral salt spray resistance: the test is carried out according to the 'determination of the neutral salt spray resistance of GB/T1771-2007 colored paint and varnish';
low-frequency-end impedance value: the test was carried out at a frequency of 0.01 Hz.
As can be seen from table 1, fig. 1 and fig. 2: the corrosion resistance of the epoxy anticorrosive paint film obtained in the embodiment 1-3 is obviously better than that of the epoxy anticorrosive paint film obtained in the comparative example 1-3; compared with the embodiment 1, the oxidation time of the graphene oxide is different, the content of the oxygen-containing functional group of the obtained graphene oxide is different, and the oxidation for 30min is more favorable for playing the lamellar blocking role of the graphene oxide; compared with the comparative example 2, in the embodiment 2, after the graphene oxide is added, the flaky graphene oxide can fill gaps among resins, so that the coating structure is more compact, meanwhile, oxygen-containing functional groups of the graphene oxide can be crosslinked with other functional groups to form new chemical bonds, the strength and the barrier property of the coating are enhanced, meanwhile, the adhesive force and the impact resistance of the epoxy anticorrosive paint film obtained in the embodiments 1-3 are improved, and the corrosion resistance is also improved; in comparative example 3, since the content of zinc powder is too high, graphene oxide is easily agglomerated when graphene oxide is added, which adversely affects the compactness of the coating, and meanwhile, since more graphene oxide is added, the coating has strong hydrophilicity and is easily foamed.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The water-based bi-component epoxy anticorrosive paint consists of a component A and a component B, and is characterized in that:
the component A comprises the following raw materials in parts by mass:
zinc powder: 20-40 parts;
film-forming auxiliary agent: 10-15 parts;
dispersing agent: 0.2 to 0.8 portion;
thickening agent: 0.4 to 0.8 portion;
anti-settling agent: 0.5 to 1 portion;
curing agent: 5-10 parts;
the component B comprises the following raw materials in parts by mass:
epoxy resin: 20-50 parts of a solvent;
graphene oxide slurry: 1-5 parts;
flash rust preventive: 0.1 to 0.5 portion;
water: 12-15 parts;
the mass ratio of the component A to the component B is 0.8: 1-1.5: 1.
2. The aqueous two-component epoxy anticorrosive coating according to claim 1, characterized in that: the zinc powder is spherical and has a particle size of 18-23 μm.
3. The aqueous two-component epoxy anticorrosive coating according to claim 1, characterized in that: the film-forming assistant is at least one of propylene glycol methyl ether and propylene glycol phenyl ether.
4. The aqueous two-component epoxy anticorrosive paint according to any one of claims 1 to 3, characterized in that: the dispersant is a polymer nonionic dispersant; the thickener is at least one of nonionic polyurethane thickener and polyamide wax.
5. The aqueous two-component epoxy anticorrosive paint according to any one of claims 1 to 3, characterized in that: the anti-settling agent is fumed silica.
6. The aqueous two-component epoxy anticorrosive paint according to any one of claims 1 to 3, characterized in that: the curing agent is a room temperature curing type water-based amine curing agent.
7. The aqueous two-component epoxy anticorrosive paint according to any one of claims 1 to 3, characterized in that: the epoxy resin is bisphenol A type epoxy resin, and the epoxy equivalent is 500 g/eq-600 g/eq.
8. The aqueous two-component epoxy anticorrosive paint according to any one of claims 1 to 3, characterized in that: the graphene oxide slurry is prepared by an improved Hummers method.
9. The aqueous two-component epoxy anticorrosive paint according to any one of claims 1 to 3, characterized in that: the flash rust inhibitor is at least one of organic zinc chelate and sodium nitrite.
10. The preparation method of the water-based two-component epoxy anticorrosive paint as claimed in any one of claims 1 to 9, characterized by comprising the following steps: uniformly mixing zinc powder, a film forming aid, a dispersing agent, a thickening agent, an anti-settling agent and a curing agent to prepare a component A, uniformly mixing epoxy resin, graphene oxide slurry, an anti-flash rust agent and water to prepare a component B, and subpackaging to obtain the aqueous bi-component epoxy anticorrosive paint.
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