CN115109496A - Water-based anticorrosive paint and preparation method thereof - Google Patents
Water-based anticorrosive paint and preparation method thereof Download PDFInfo
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- CN115109496A CN115109496A CN202210675777.2A CN202210675777A CN115109496A CN 115109496 A CN115109496 A CN 115109496A CN 202210675777 A CN202210675777 A CN 202210675777A CN 115109496 A CN115109496 A CN 115109496A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 239000003973 paint Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 38
- 229910000077 silane Inorganic materials 0.000 claims abstract description 77
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical class [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims abstract description 63
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims abstract description 63
- 229960001545 hydrotalcite Drugs 0.000 claims abstract description 63
- 229910001701 hydrotalcite Inorganic materials 0.000 claims abstract description 63
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 49
- 238000000576 coating method Methods 0.000 claims abstract description 48
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000011248 coating agent Substances 0.000 claims abstract description 40
- -1 silane modified boron nitride Chemical class 0.000 claims abstract description 35
- 239000002131 composite material Substances 0.000 claims abstract description 34
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 239000003822 epoxy resin Substances 0.000 claims abstract description 24
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 24
- 239000003085 diluting agent Substances 0.000 claims abstract description 15
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 14
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 239000000243 solution Substances 0.000 claims description 64
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 58
- 238000001035 drying Methods 0.000 claims description 33
- 238000005406 washing Methods 0.000 claims description 29
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 26
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims description 25
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 25
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 23
- 239000004593 Epoxy Substances 0.000 claims description 22
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 21
- 229910052582 BN Inorganic materials 0.000 claims description 17
- 239000004843 novolac epoxy resin Substances 0.000 claims description 16
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 15
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 14
- 238000001354 calcination Methods 0.000 claims description 12
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 239000012298 atmosphere 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
- 238000001914 filtration Methods 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 239000012266 salt solution Substances 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 8
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 150000003751 zinc Chemical class 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims description 4
- HDYRYUINDGQKMC-UHFFFAOYSA-M acetyloxyaluminum;dihydrate Chemical compound O.O.CC(=O)O[Al] HDYRYUINDGQKMC-UHFFFAOYSA-M 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229940009827 aluminum acetate Drugs 0.000 claims description 4
- 239000004246 zinc acetate Substances 0.000 claims description 4
- 239000011592 zinc chloride Substances 0.000 claims description 4
- 235000005074 zinc chloride Nutrition 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 230000001476 alcoholic effect Effects 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 description 19
- 230000007797 corrosion Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000004848 polyfunctional curative Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000000945 filler Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000003385 bacteriostatic effect Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 230000005476 size effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- ZHPNWZCWUUJAJC-UHFFFAOYSA-N fluorosilicon Chemical compound [Si]F ZHPNWZCWUUJAJC-UHFFFAOYSA-N 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- 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
- C09D163/04—Epoxynovolacs
-
- 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
-
- 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
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention belongs to the technical field of anticorrosive coatings, and particularly relates to a water-based anticorrosive coating and a preparation method thereof. The anticorrosive paint comprises the following raw materials in parts by weight: 50-60 parts of water-based epoxy resin; 6-8 parts of a silane modified boron nitride and silicon nitride composite material and 4-6 parts of silane modified zinc-aluminum hydrotalcite; 12-22 parts of a diluent; 10-18 parts of a curing agent; 4-8 parts of a dispersing agent and 4-6 parts of a defoaming agent. The water-based anticorrosive paint prepared by the invention has excellent adhesive force, good wear resistance and strong anticorrosive capability.
Description
Technical Field
The invention belongs to the technical field of anticorrosive coatings. More particularly, relates to a water-based anticorrosive paint and a preparation method thereof.
Background
The organic coating is applied to the surface of the metal, which is a very effective metal corrosion prevention method. The organic coating acts as a barrier between the metal substrate and the corrosive environment, hindering corrosive media (e.g., oxygen, water, and Cl) - Plasma) to penetrate the metal surface. However, organic coatings generally contain a large amount of volatile organic compounds, which can cause environmental pollution. With the increasing importance of the country on environmental protection, organic coatings gradually develop towards high solid content, solvent-free and water-based, wherein water-based coatings develop faster in recent years, but the application of water-based coatings in harsh corrosive environments is still limited. In recent years, researchers have improved the corrosion resistance of waterborne coatings by adding various anti-corrosive pigments, nanoparticles, and the like.
The nano material has many excellent characteristics, such as small size effect, surface effect, quantum size effect, macroscopic quantum tunneling effect and dielectric effect, and the addition of the nano particles into the water-based epoxy resin coating can enable organic phases and inorganic phases to be combined with each other on a nano layer surface to form various bonding actions on a two-phase interface, so that the coating has the excellent characteristics of the nano material. Researches find that the diffusion path of the nano modified coating erosion substance is shortened, the pores of the coating are reduced, and the wear resistance, the aging resistance and the corrosion resistance of the coating are enhanced.
CN112521833A discloses a water-based anticorrosive paint for a metal matrix and application thereof, belonging to the technical field of paints. The paint comprises the following components in parts by weight: 10-69 parts of water-based epoxy resin, 5-69 parts of fluorosilicone emulsion, 3-20 parts of solid filler, 5-44 parts of diluent, 2-20 parts of curing agent and 1-7 parts of film-forming assistant. After the water-based anticorrosive coating disclosed by the invention is formed into a film, the film can be efficiently subjected to friction electrification in the presence of waves due to the existence of the fluorine-silicon emulsion, and generated charges are loaded on the surface of the film and are induced onto a metal matrix, so that the condition that the metal matrix is corroded due to electron losing is prevented; meanwhile, the use of the solid filler and the water-based epoxy resin also enables the coating film to have certain anticorrosion performance.
CN114032003A discloses an anticorrosive paint applied to ships and a preparation method thereof. The anticorrosive paint applied to ships comprises the following raw materials in parts by weight: 40-60 parts of epoxy resin, 5-15 parts of modified basalt flake/carbon nitride composite material, 3-8 parts of samarium and copper co-doped zinc oxide/graphene composite material, 10-18 parts of filler, 1.5-6 parts of assistant and 20-30 parts of water. The anticorrosive coating applied to the ship can solve the actual problem that the ship needs to be bacteriostatic and anticorrosive, has excellent adhesive force and good wear resistance, can stand high and low temperature and high salinity, can well resist bacterial corrosion, and achieves the bacteriostatic and anticorrosive effects.
Although the above-mentioned coating has achieved a certain success, the above-mentioned anticorrosive coating still has a certain deficiency in the practical application process, so there is still a need for a new anticorrosive coating to solve the problems of wear resistance, adhesion and corrosion resistance.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings in the prior art and provide a water-based anticorrosive paint and a preparation method thereof. The anticorrosive paint comprises the following raw materials in parts by weight: 50-60 parts of water-based epoxy resin; 6-8 parts of silane modified boron nitride and silicon nitride composite material and 4-6 parts of silane modified zinc-aluminum hydrotalcite; 12-22 parts of a diluent; 10-18 parts of a curing agent; 4-8 parts of a dispersing agent and 4-6 parts of a defoaming agent. The water-based anticorrosive coating prepared by the invention has excellent adhesive force, good wear resistance and strong anticorrosive capability.
The invention aims to provide a water-based anticorrosive paint.
The invention also aims to provide a preparation method of the water-based anticorrosive paint.
The above purpose of the invention is realized by the following technical scheme:
the water-based anticorrosive paint comprises the following raw materials in parts by weight:
50-60 parts of water-based epoxy resin; 6-8 parts of silane modified boron nitride and silicon nitride composite material and 4-6 parts of silane modified zinc-aluminum hydrotalcite; 12-22 parts of a diluent; 10-18 parts of a curing agent; 4-8 parts of a dispersing agent and 4-6 parts of a defoaming agent.
Preferably, the diluent is one or more of water, ethanol and isopropanol; the curing agent is one or more of waterborne epoxy curing agent EA-15, waterborne epoxy curing agent EA-31 and waterborne epoxy curing agent H202B; the dispersant is one or more of BYK-180, BYK-190 and BYK-192; the defoaming agent is one or more of BYK-019, BYK-024 and BYK-028.
Preferably, the water-based epoxy resin is Dow DER-916 water-based epoxy resin, NPED-420 water-based novolac epoxy resin or CYD-014U water-based epoxy resin;
preferably, the preparation method of the silane-modified boron nitride and silicon nitride comprises the following steps:
adding a silane coupling agent into alcohol to obtain an alcohol solution of the silane coupling agent; adding boron nitride and silicon nitride into an alcoholic solution of a silane coupling agent to obtain a mixed solution; ultrasonic dispersion is carried out for 40-60 min; filtering, washing, and drying at 90-110 ℃ for 12-18 h to obtain the silane modified boron nitride and silicon nitride composite material.
Preferably, the mass fraction of the silane coupling agent is 2-6 wt%; the alcohol is methanol or ethanol; the silane coupling agent is at least one of KH550, KH560 and KH 570; the mass ratio of the boron nitride to the silicon nitride to the silane coupling agent is 1: 0.6-1.0: 0.3.
preferably, the preparation method of the silane modified zinc-aluminum hydrotalcite comprises the following steps: (a) weighing zinc salt and aluminum salt, dissolving the zinc salt and the aluminum salt in deionized water to prepare a mixed salt solution, stirring, then dropwise adding alkali liquor to adjust the pH of the solution, then transferring the solution to a hydrothermal reaction kettle for reaction, centrifuging, washing, drying, then calcining, and grinding to obtain zinc-aluminum hydrotalcite; (b) and (b) adding the zinc-aluminum hydrotalcite obtained in the step (a) into the added silane coupling agent ethanol water solution for reaction, and then centrifuging, washing and drying to obtain the silane modified zinc-aluminum hydrotalcite.
Preferably, the zinc salt is at least one of zinc nitrate, zinc acetate and zinc chloride; the aluminum salt is at least one of aluminum nitrate, aluminum chloride and aluminum acetate; the alkali is one of sodium hydroxide, potassium hydroxide, sodium carbonate and ammonia water.
Preferably, in the step (a), the molar ratio of zinc to aluminum is 1: 1-3: the alkali is 1-3 mol/L, and in the step (b), the molar ratio of the aluminum to the silane is 1: 0.2-0.3; the silane is at least one of KH550, KH560 and KH 570; the volume ratio of the ethanol water is 1: 1-3.
Preferably, in step (a); the stirring time is 20-40 min, and the pH is 9; the hydrothermal reaction is carried out at the temperature of 150-170 ℃ for 6-10 h; the drying is carried out at the temperature of 90-110 ℃ for 12-16 h; the calcination is carried out for 12-16 h in an air atmosphere at 460-500 ℃; in step (b); the concentration of the ethanol water solution of the silane coupling agent is 2-4 mol/L; the reaction is carried out for 5-9 h at 65-75 ℃; the drying is carried out at the temperature of 80-110 ℃ for 12-18 h.
The preparation method of the water-based anticorrosive coating comprises the following steps of firstly mixing the water-based epoxy resin, the silane-modified boron nitride and silicon nitride composite material, the silane-modified zinc-aluminum hydrotalcite and the diluent in a high-speed mixer at a mixing speed of 2500-3500 r/min for 30-50 min, then adding the curing agent, the dispersing agent and the defoaming agent into the mixture, and continuously stirring for 10-30 min to obtain the anticorrosive coating.
The invention has the following beneficial effects:
(1) the boron nitride and the silicon nitride are subjected to silane modification, so that the stability and the corrosion resistance of the boron nitride and the silicon nitride in the coating can be improved, and the corrosion resistance of the coating can be obviously improved by utilizing the coordination effect of the boron nitride and the silicon nitride.
(2) The zinc-aluminum hydrotalcite is modified by silane, so that the dispersibility of the zinc-aluminum hydrotalcite in the coating can be improved, the corrosion resistance of the coating is further improved, and the corrosion resistance of the coating is further improved by utilizing the interaction between the zinc-aluminum hydrotalcite and silane-modified boron nitride and silicon nitride.
(3) The water-based anticorrosive coating prepared by the invention has the characteristics of excellent adhesive force, good wear resistance, strong anticorrosive capability and the like.
Detailed Description
The present invention will be further described with reference to the following specific examples, which are not intended to limit the invention in any manner. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
Unless otherwise indicated, reagents and materials used in the following examples are commercially available.
Example 1
The water-based anticorrosive paint comprises the following raw materials in parts by weight:
55 parts of NPED-420 waterborne novolac epoxy resin; 7 parts of silane modified boron nitride and silicon nitride composite material and 5 parts of silane modified zinc-aluminum hydrotalcite; 17 parts of water; aqueous epoxy hardener EA-1514 parts; BYK-1806 parts and BYK-0195 parts;
the preparation method of the silane modified boron nitride and silicon nitride comprises the following steps:
adding KH560 into ethanol according to the mass fraction of KH560 of 4 wt% to obtain ethanol solution of KH 560; adding 10g of boron nitride and 8g of silicon nitride into 75g of KH560 ethanol solution to obtain a mixed solution; ultrasonic dispersing for 50 min; filtering, washing and drying at 100 ℃ for 15h to obtain the silane modified boron nitride and silicon nitride composite material.
The preparation method of the silane modified zinc-aluminum hydrotalcite comprises the following steps: (a) weighing 1mol of zinc nitrate and 2mol of aluminum nitrate, dissolving the zinc nitrate and the aluminum nitrate in 100mL of deionized water to prepare a mixed salt solution, stirring for 30min, then dropwise adding 2mol/L of sodium hydroxide solution to adjust the pH value of the solution to 9, then transferring the solution to a hydrothermal reaction kettle to react for 8h at 160 ℃, centrifuging, washing, drying for 14h at 100 ℃, then calcining for 14h at 480 ℃ in the air atmosphere, and grinding to obtain zinc-aluminum hydrotalcite; (b) adding the zinc-aluminum hydrotalcite obtained in the step (a) into 250mL of KH560 ethanol water (the volume ratio of the ethanol water is 1: 2; the concentration of the ethanol water solution of the silane coupling agent is 2mol/L) solution, reacting for 7h at 70 ℃, centrifuging, washing, and drying for 15h at 100 ℃ to obtain silane modified zinc-aluminum hydrotalcite;
the preparation method of the water-based anticorrosive paint comprises the following steps of firstly mixing NPED-420 water-based novolac epoxy resin, a silane-modified boron nitride and silicon nitride composite material, silane-modified zinc-aluminum hydrotalcite and water in a high-speed mixer at a mixing speed of 3000r/min for 40min, then adding water-based epoxy curing agents EA-15, BYK-180 and BYK-019 into the mixture, and continuously stirring for 20min to obtain the anticorrosive paint.
Example 2
The water-based anticorrosive paint comprises the following raw materials in parts by weight:
60 parts of water-based epoxy resin; 6 parts of silane modified boron nitride and silicon nitride composite material and 6 parts of silane modified zinc-aluminum hydrotalcite; 12 parts of a diluent; 18 parts of a curing agent; 4 parts of a dispersing agent and 6 parts of a defoaming agent;
the diluent is ethanol.
The curing agent is a water-based epoxy curing agent EA-31.
The dispersant is BYK-190.
The defoaming agent is BYK-024.
The water-based epoxy resin is preferably Dow DER-916 water-based epoxy resin.
The preparation method of the silane modified boron nitride and silicon nitride comprises the following steps:
adding KH550 into methanol according to the mass fraction of KH550 of 6 wt% to obtain a methanol solution of KH 550; adding 10g of boron nitride and 10g of silicon nitride into 50g of KH550 methanol solution to obtain a mixed solution; ultrasonic dispersing for 60 min; filtering, washing and drying at 110 ℃ for 12h to obtain the silane modified boron nitride and silicon nitride composite material.
The preparation method of the silane modified zinc-aluminum hydrotalcite comprises the following steps: (a) weighing 1mol of zinc acetate and 3mol of aluminum chloride, dissolving the zinc acetate and the 3mol of aluminum chloride in 100mL of deionized water to prepare a mixed salt solution, stirring for 40min, then dropwise adding a potassium hydroxide solution with the concentration of 3mol/L to adjust the pH value of the solution to 9, then transferring the solution to a hydrothermal reaction kettle to react for 6h at the temperature of 170 ℃, centrifuging, washing, drying for 12h at the temperature of 110 ℃, then calcining for 12h at the temperature of 500 ℃ in the air atmosphere, and grinding to obtain zinc-aluminum hydrotalcite; (b) adding the zinc-aluminum hydrotalcite obtained in the step (a) into 225mLKH550 ethanol water solution (the volume ratio of ethanol to water is 1: 3; the concentration of the ethanol to water solution of a silane coupling agent is 4mol/L) to react for 5h at 75 ℃, centrifuging, washing, and drying for 12h at 110 ℃ to obtain silane modified zinc-aluminum hydrotalcite;
the preparation method of the water-based anticorrosive coating comprises the following steps of firstly mixing the water-based epoxy resin, the silane modified boron nitride and silicon nitride composite material, the silane modified zinc-aluminum hydrotalcite and the diluent in a high-speed mixer at a mixing speed of 3500r/min for 50min, then adding the curing agent, the dispersing agent and the defoaming agent into the mixture, and continuously stirring for 30min to obtain the anticorrosive coating.
Example 3
The water-based anticorrosive paint comprises the following raw materials in parts by weight:
50 parts of water-based epoxy resin; 8 parts of silane modified boron nitride and silicon nitride composite material and 4 parts of silane modified zinc-aluminum hydrotalcite; 22 parts of a diluent; 10 parts of a curing agent; 8 parts of a dispersing agent and 4 parts of a defoaming agent;
the diluent is isopropanol.
The curing agent is a water-based epoxy curing agent H202B.
The dispersant is BYK-192.
The defoaming agent is BYK-028.
The waterborne epoxy resin is CYD-014U waterborne epoxy resin;
the preparation method of the silane modified boron nitride and silicon nitride comprises the following steps:
adding KH570 into ethanol according to the mass fraction of KH570 of 2 wt% to obtain an ethanol solution of KH 570; adding 10g of boron nitride and 6g of silicon nitride into 150g of KH570 ethanol solution to obtain a mixed solution; ultrasonic dispersion for 40 min; filtering, washing and drying at 90 ℃ for 18h to obtain the silane modified boron nitride and silicon nitride composite material.
The preparation method of the silane modified zinc-aluminum hydrotalcite comprises the following steps: (a) weighing 1mol of zinc chloride and 1mol of aluminum acetate, dissolving the zinc chloride and the aluminum acetate in 100mL of deionized water to prepare a mixed salt solution, stirring for 20min, then dropwise adding 1mol/L ammonia water solution to adjust the pH value of the solution to 9, then transferring the solution to a hydrothermal reaction kettle, reacting at 150 ℃ for 10h, centrifuging, washing, drying at 90 ℃ for 16h, then calcining at 460 ℃ for 16h in the air atmosphere, and grinding to obtain zinc-aluminum hydrotalcite; (b) and (b) adding the zinc-aluminum hydrotalcite obtained in the step (a) into 100mL of KH570 ethanol water solution (the volume ratio of ethanol water is 1: 1; the concentration of the ethanol water solution of the silane coupling agent is 2mol/L) to react for 9h at 65 ℃, centrifuging, washing, and drying for 18h at 80 ℃ to obtain the silane modified zinc-aluminum hydrotalcite.
The preparation method of the water-based anticorrosive coating comprises the following steps of firstly mixing the water-based epoxy resin, the silane modified boron nitride and silicon nitride composite material, the silane modified zinc-aluminum hydrotalcite and the diluent in a high-speed stirrer at the stirring speed of 2500r/min for 30min, then adding the curing agent, the dispersing agent and the defoaming agent into the mixture, and continuously stirring for 10min to obtain the anticorrosive coating.
Comparative example 1
The water-based anticorrosive paint comprises the following raw materials in parts by weight:
55 parts of NPED-420 waterborne novolac epoxy resin; 7 parts of silane modified boron nitride composite material and 5 parts of silane modified zinc-aluminum hydrotalcite; 17 parts of water; aqueous epoxy hardener EA-1514 parts; BYK-1806 parts and BYK-0195 parts;
the preparation method of the silane modified boron nitride comprises the following steps:
adding KH560 into ethanol according to the mass fraction of KH560 of 4 wt% to obtain ethanol solution of KH 560; adding 18g of boron nitride into 75g of KH560 ethanol solution to obtain a mixed solution; ultrasonic dispersing for 50 min; filtering, washing and drying for 15h at 100 ℃ to obtain the silane modified boron nitride composite material.
The preparation method of the silane modified zinc-aluminum hydrotalcite comprises the following steps: (a) weighing 1mol of zinc nitrate and 2mol of aluminum nitrate, dissolving the zinc nitrate and the aluminum nitrate in 100mL of deionized water to prepare a mixed salt solution, stirring for 30min, then dropwise adding 2mol/L of sodium hydroxide solution to adjust the pH value of the solution to 9, then transferring the solution to a hydrothermal reaction kettle to react for 8h at 160 ℃, centrifuging, washing, drying for 14h at 100 ℃, then calcining for 14h at 480 ℃ in the air atmosphere, and grinding to obtain zinc-aluminum hydrotalcite; (b) adding the zinc-aluminum hydrotalcite obtained in the step (a) into 250mL of KH560 ethanol water (the volume ratio of the ethanol water is 1: 2; the concentration of the ethanol water solution of the silane coupling agent is 2mol/L) solution, reacting for 7h at 70 ℃, centrifuging, washing, and drying for 15h at 100 ℃ to obtain silane modified zinc-aluminum hydrotalcite;
the preparation method of the water-based anticorrosive coating comprises the following steps of firstly mixing NPED-420 water-based novolac epoxy resin, a silane modified boron nitride composite material, a silane modified zinc-aluminum hydrotalcite and water in a high-speed mixer at a mixing speed of 3000r/min for 40min, then adding water-based epoxy curing agents EA-15, BYK-180 and BYK-019 into the mixture, and continuously stirring for 20min to obtain the anticorrosive coating.
Comparative example 2
The water-based anticorrosive paint comprises the following raw materials in parts by weight:
55 parts of NPED-420 waterborne novolac epoxy resin; 7 parts of silane modified silicon nitride composite material and 5 parts of silane modified zinc-aluminum hydrotalcite; 17 parts of water; aqueous epoxy hardener EA-1514 parts; BYK-1806 parts and BYK-0195 parts;
the preparation method of the silane modified silicon nitride comprises the following steps:
adding KH560 into ethanol according to the mass fraction of KH560 of 4 wt% to obtain ethanol solution of KH 560; adding 18g of silicon nitride into 75g of KH560 ethanol solution to obtain a mixed solution; ultrasonic dispersing for 50 min; filtering, washing and drying for 15 hours at 100 ℃ to obtain the silane modified silicon nitride composite material.
The preparation method of the silane modified zinc-aluminum hydrotalcite comprises the following steps: (a) weighing 1mol of zinc nitrate and 2mol of aluminum nitrate, dissolving the zinc nitrate and the aluminum nitrate in 100mL of deionized water to prepare a mixed salt solution, stirring for 30min, then dropwise adding 2mol/L of sodium hydroxide solution to adjust the pH value of the solution to 9, then transferring the solution to a hydrothermal reaction kettle to react for 8h at 160 ℃, centrifuging, washing, drying for 14h at 100 ℃, then calcining for 14h at 480 ℃ in the air atmosphere, and grinding to obtain zinc-aluminum hydrotalcite; (b) adding the zinc-aluminum hydrotalcite obtained in the step (a) into 250mL of KH560 ethanol water (the volume ratio of the ethanol water is 1: 2; the concentration of the ethanol water solution of the silane coupling agent is 2mol/L) solution, reacting for 7h at 70 ℃, centrifuging, washing, and drying for 15h at 100 ℃ to obtain silane modified zinc-aluminum hydrotalcite;
the preparation method of the water-based anticorrosive coating comprises the following steps of firstly mixing NPED-420 water-based novolac epoxy resin, a silane-modified silicon nitride composite material, a silane-modified zinc-aluminum hydrotalcite and water in a high-speed mixer at a mixing speed of 3000r/min for 40min, then adding water-based epoxy curing agents EA-15, BYK-180 and BYK-019 into the mixture, and continuously stirring for 20min to obtain the anticorrosive coating.
Comparative example 3
The water-based anticorrosive paint comprises the following raw materials in parts by weight:
55 parts of NPED-420 waterborne novolac epoxy resin; 12 parts of silane modified boron nitride and silicon nitride composite material; 17 parts of water; aqueous epoxy hardener EA-1514 parts; BYK-1806 parts and BYK-0195 parts;
the preparation method of the silane modified boron nitride and silicon nitride comprises the following steps:
adding KH560 into ethanol according to the mass fraction of KH560 of 4 wt% to obtain an ethanol solution of KH 560; adding 10g of boron nitride and 8g of silicon nitride into 75g of KH560 ethanol solution to obtain a mixed solution; ultrasonic dispersing for 50 min; filtering, washing and drying at 100 ℃ for 15h to obtain the silane modified boron nitride and silicon nitride composite material.
The preparation method of the water-based anticorrosive coating comprises the following steps of firstly mixing NPED-420 water-based novolac epoxy resin, silane modified boron nitride and silicon nitride composite material and water in a high-speed mixer at a mixing speed of 3000r/min for 40min, then adding water-based epoxy curing agents EA-15, BYK-180 and BYK-019 into the mixture, and continuously stirring for 20min to obtain the anticorrosive coating.
Comparative example 4
The water-based anticorrosive paint comprises the following raw materials in parts by weight:
55 parts of NPED-420 waterborne novolac epoxy resin; 12 parts of silane modified zinc-aluminum hydrotalcite; 17 parts of water; aqueous epoxy hardener EA-1514 parts; BYK-1806 parts and BYK-0195 parts;
the preparation method of the silane modified zinc-aluminum hydrotalcite comprises the following steps: (a) weighing 1mol of zinc nitrate and 2mol of aluminum nitrate, dissolving the zinc nitrate and the aluminum nitrate in 100mL of deionized water to prepare a mixed salt solution, stirring for 30min, then dropwise adding 2mol/L of sodium hydroxide solution to adjust the pH value of the solution to 9, then transferring the solution to a hydrothermal reaction kettle to react for 8h at 160 ℃, centrifuging, washing, drying for 14h at 100 ℃, then calcining for 14h at 480 ℃ in the air atmosphere, and grinding to obtain zinc-aluminum hydrotalcite; (b) adding the zinc-aluminum hydrotalcite obtained in the step (a) into 250mL of KH560 ethanol water (the volume ratio of the ethanol water is 1: 2; the concentration of the ethanol water solution of the silane coupling agent is 2mol/L) solution, reacting for 7h at 70 ℃, centrifuging, washing, and drying for 15h at 100 ℃ to obtain silane modified zinc-aluminum hydrotalcite;
the preparation method of the water-based anticorrosive coating comprises the following steps of firstly mixing NPED-420 water-based novolac epoxy resin, silane modified zinc-aluminum hydrotalcite and water in a high-speed mixer at a mixing speed of 3000r/min for 40min, then adding water-based epoxy curing agents EA-15, BYK-180 and BYK-019 into the mixture, and continuously stirring for 20min to obtain the anticorrosive coating.
Comparative example 5
The water-based anticorrosive paint comprises the following raw materials in parts by weight:
55 parts of NPED-420 waterborne novolac epoxy resin; 7 parts of boron nitride and silicon nitride composite material and 5 parts of silane modified zinc-aluminum hydrotalcite; 17 parts of water; aqueous epoxy hardener EA-1514 parts; BYK-1806 parts and BYK-0195 parts;
the preparation method of the silane modified boron nitride and silicon nitride comprises the following steps:
adding 10g of boron nitride and 8g of silicon nitride into 75g of ethanol solution to obtain mixed solution; ultrasonic dispersing for 50 min; filtering, washing and drying at 100 ℃ for 15h to obtain the boron nitride and silicon nitride composite material.
The preparation method of the silane modified zinc-aluminum hydrotalcite comprises the following steps: (a) weighing 1mol of zinc nitrate and 2mol of aluminum nitrate, dissolving the zinc nitrate and the aluminum nitrate in 100mL of deionized water to prepare a mixed salt solution, stirring for 30min, then dropwise adding 2mol/L of sodium hydroxide solution to adjust the pH value of the solution to 9, then transferring the solution to a hydrothermal reaction kettle to react for 8h at 160 ℃, centrifuging, washing, drying for 14h at 100 ℃, then calcining for 14h at 480 ℃ in the air atmosphere, and grinding to obtain zinc-aluminum hydrotalcite; (b) adding the zinc-aluminum hydrotalcite obtained in the step (a) into 250mL of KH560 ethanol water (the volume ratio of the ethanol water is 1: 2; the concentration of the ethanol water solution of the silane coupling agent is 2mol/L) solution, reacting for 7h at 70 ℃, centrifuging, washing, and drying for 15h at 100 ℃ to obtain silane modified zinc-aluminum hydrotalcite;
the preparation method of the water-based anticorrosive coating comprises the following steps of firstly mixing NPED-420 water-based novolac epoxy resin, boron nitride and silicon nitride composite material, silane modified zinc-aluminum hydrotalcite and water in a high-speed mixer at a mixing speed of 3000r/min for 40min, then adding water-based epoxy curing agents EA-15, BYK-180 and BYK-019 into the mixture, and continuously stirring for 20min to obtain the anticorrosive coating.
Comparative example 6
The water-based anticorrosive paint comprises the following raw materials in parts by weight:
55 parts of NPED-420 waterborne novolac epoxy resin; 7 parts of silane modified boron nitride and silicon nitride composite material and 5 parts of zinc-aluminum hydrotalcite; 17 parts of water; aqueous epoxy hardener EA-1514 parts; BYK-1806 parts and BYK-0195 parts;
the preparation method of the silane modified boron nitride and silicon nitride comprises the following steps:
adding KH560 into ethanol according to the mass fraction of KH560 of 4 wt% to obtain ethanol solution of KH 560; adding 10g of boron nitride and 8g of silicon nitride into 75g of KH560 ethanol solution to obtain a mixed solution; ultrasonic dispersing for 50 min; filtering, washing and drying at 100 ℃ for 15h to obtain the silane modified boron nitride and silicon nitride composite material.
The preparation method of the zinc-aluminum hydrotalcite comprises the following steps: (a) weighing 1mol of zinc nitrate and 2mol of aluminum nitrate, dissolving the zinc nitrate and the aluminum nitrate in 100mL of deionized water to prepare a mixed salt solution, stirring for 30min, then dropwise adding 2mol/L of sodium hydroxide solution to adjust the pH value of the solution to 9, then transferring the solution to a hydrothermal reaction kettle to react for 8h at 160 ℃, centrifuging, washing, drying for 14h at 100 ℃, then calcining for 14h at 480 ℃ in the air atmosphere, and grinding to obtain the zinc-aluminum hydrotalcite.
The preparation method of the water-based anticorrosive coating comprises the following steps of firstly mixing NPED-420 water-based novolac epoxy resin, a silane modified boron nitride and silicon nitride composite material, zinc-aluminum hydrotalcite and water in a high-speed mixer at a mixing speed of 3000r/min for 40min, then adding water-based epoxy curing agents EA-15, BYK-180 and BYK-019 into the mixture, and continuously stirring for 20min to obtain the anticorrosive coating.
The corrosion resistance of the obtained water-based anticorrosive paint is tested according to the GB/T1771-2007 method. The results are shown in Table 1:
TABLE 1 test results of maximum corrosion time of water-based anticorrosive paint
As can be seen from Table 1, the waterborne anticorrosive paint prepared by the method has excellent anticorrosive performance, and the mutual synergistic effect of the components can be found, and meanwhile, the introduction of the silane can modify and improve the anticorrosive capability of the paint.
The coatings of examples 1 to 3 and comparative examples 1 to 6 were tested for adhesion and impact resistance according to GB1720 and GB1732, the results are shown in Table 2.
TABLE 2
As can be seen from Table 2, the water-soluble paint prepared by the present invention has excellent adhesion and impact resistance by comparing the examples with the comparative examples.
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 anticorrosive paint is characterized in that: the anticorrosive paint comprises the following raw materials in parts by weight:
50-60 parts of water-based epoxy resin; 6-8 parts of silane modified boron nitride and silicon nitride composite material and 4-6 parts of silane modified zinc-aluminum hydrotalcite; 12-22 parts of a diluent; 10-18 parts of a curing agent; 4-8 parts of a dispersing agent and 4-6 parts of a defoaming agent.
2. The water-based anticorrosive paint according to claim 1, characterized in that: the diluent is one or more of water, ethanol and isopropanol; the curing agent is one or more of waterborne epoxy curing agent EA-15, waterborne epoxy curing agent EA-31 and waterborne epoxy curing agent H202B; the dispersing agent is one or more of BYK-180, BYK-190 and BYK-192; the defoaming agent is one or more of BYK-019, BYK-024 and BYK-028.
3. The water-based anticorrosive paint according to claim 1, characterized in that: the waterborne epoxy resin is Dow DER-916 waterborne epoxy resin, NPED-420 waterborne novolac epoxy resin or CYD-014U waterborne epoxy resin.
4. The water-based anticorrosive paint according to claim 1, characterized in that: the preparation method of the silane modified boron nitride and silicon nitride comprises the following steps:
adding a silane coupling agent into alcohol to obtain an alcohol solution of the silane coupling agent; adding boron nitride and silicon nitride into an alcoholic solution of a silane coupling agent to obtain a mixed solution; carrying out ultrasonic dispersion for 40-60 min; filtering, washing, and drying at 90-110 ℃ for 12-18 h to obtain the silane modified boron nitride and silicon nitride composite material.
5. The water-based anticorrosive paint according to claim 4, characterized in that: the mass fraction of the silane coupling agent is 2-6 wt%; the alcohol is methanol or ethanol; the silane coupling agent is at least one of KH550, KH560 and KH 570; the mass ratio of the boron nitride to the silicon nitride to the silane coupling agent is 1: 0.6-1.0: 0.3.
6. the water-based anticorrosive paint according to claim 1, characterized in that: the preparation method of the silane modified zinc-aluminum hydrotalcite comprises the following steps: (a) weighing zinc salt and aluminum salt, dissolving the zinc salt and the aluminum salt in deionized water to prepare a mixed salt solution, stirring, then dropwise adding alkali liquor to adjust the pH of the solution, then transferring the solution to a hydrothermal reaction kettle for reaction, centrifuging, washing, drying, then calcining, and grinding to obtain zinc-aluminum hydrotalcite; (b) and (b) adding the zinc-aluminum hydrotalcite obtained in the step (a) into the added silane coupling agent ethanol water solution for reaction, and then centrifuging, washing and drying to obtain the silane modified zinc-aluminum hydrotalcite.
7. The water-based anticorrosive paint according to claim 6, characterized in that: the zinc salt is at least one of zinc nitrate, zinc acetate and zinc chloride; the aluminum salt is at least one of aluminum nitrate, aluminum chloride and aluminum acetate; the alkali is one of sodium hydroxide, potassium hydroxide, sodium carbonate and ammonia water.
8. The water-based anticorrosive paint according to claim 6, characterized in that: in the step (a), the molar ratio of zinc to aluminum is 1: 1-3: the alkali is 1-3 mol/L, and in the step (b), the molar ratio of the aluminum to the silane is 1: 0.2-0.3; the silane is at least one of KH550, KH560 and KH 570; the volume ratio of the ethanol water is 1: 1-3.
9. The aqueous anticorrosive paint according to any one of claims 6 to 8, characterized in that: in step (a); the stirring time is 20-40 min, and the pH value is 9; the hydrothermal reaction is carried out at the temperature of 150-170 ℃ for 6-10 h; the drying is carried out at the temperature of 90-110 ℃ for 12-16 h; the calcination is carried out for 12-16 h in an air atmosphere at 460-500 ℃; in step (b); the concentration of the ethanol water solution of the silane coupling agent is 2-4 mol/L; the reaction is carried out for 5-9 h at 65-75 ℃; the drying is carried out at the temperature of 80-110 ℃ for 12-18 h.
10. The method for preparing a water-based anticorrosive paint according to any one of claims 1 to 9, characterized in that: the preparation method comprises the following steps of firstly putting the waterborne epoxy resin, the silane modified boron nitride and silicon nitride composite material, the silane modified zinc-aluminum hydrotalcite and the diluent into a high-speed stirrer to be mixed, stirring for 30-50 min at the stirring speed of 2500-3500 r/min, then adding the curing agent, the dispersing agent and the defoaming agent into the mixture, and continuing stirring for 10-30 min to obtain the anticorrosive coating.
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Application publication date: 20220927 |