CN114702881A - Solvent-free epoxy graphene zinc powder coating and preparation method thereof - Google Patents
Solvent-free epoxy graphene zinc powder coating and preparation method thereof Download PDFInfo
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 86
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 76
- 239000011248 coating agent Substances 0.000 title claims abstract description 57
- 238000000576 coating method Methods 0.000 title claims abstract description 57
- 239000004593 Epoxy Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000003822 epoxy resin Substances 0.000 claims abstract description 51
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 51
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 46
- 229920005989 resin Polymers 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 24
- 239000000945 filler Substances 0.000 claims abstract description 18
- 239000013008 thixotropic agent Substances 0.000 claims abstract description 18
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims description 67
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 54
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 54
- 239000006185 dispersion Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 21
- IBLKWZIFZMJLFL-UHFFFAOYSA-N 1-phenoxypropan-2-ol Chemical compound CC(O)COC1=CC=CC=C1 IBLKWZIFZMJLFL-UHFFFAOYSA-N 0.000 claims description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 20
- 238000000498 ball milling Methods 0.000 claims description 20
- 239000008367 deionised water Substances 0.000 claims description 20
- 229910021641 deionized water Inorganic materials 0.000 claims description 20
- 150000004676 glycans Chemical class 0.000 claims description 20
- 239000011261 inert gas Substances 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 20
- 229920001282 polysaccharide Polymers 0.000 claims description 20
- 239000005017 polysaccharide Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000005260 corrosion Methods 0.000 claims description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 15
- 239000012752 auxiliary agent Substances 0.000 claims description 11
- 238000010907 mechanical stirring Methods 0.000 claims description 11
- 229910052725 zinc Inorganic materials 0.000 claims description 10
- 239000011701 zinc Substances 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims description 9
- 230000000996 additive effect Effects 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 9
- 238000003760 magnetic stirring Methods 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- JUWGUJSXVOBPHP-UHFFFAOYSA-B titanium(4+);tetraphosphate Chemical compound [Ti+4].[Ti+4].[Ti+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O JUWGUJSXVOBPHP-UHFFFAOYSA-B 0.000 claims description 9
- JDLYKQWJXAQNNS-UHFFFAOYSA-L zinc;dibenzoate Chemical compound [Zn+2].[O-]C(=O)C1=CC=CC=C1.[O-]C(=O)C1=CC=CC=C1 JDLYKQWJXAQNNS-UHFFFAOYSA-L 0.000 claims description 9
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000010445 mica Substances 0.000 claims description 6
- 229910052618 mica group Inorganic materials 0.000 claims description 6
- 229910021485 fumed silica Inorganic materials 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 2
- 229910052734 helium Inorganic materials 0.000 claims description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000006115 industrial coating Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
- C09D177/00—Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Coating compositions based on derivatives of such polymers
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention provides a solvent-free epoxy graphene zinc powder coating and a preparation method thereof, wherein the solvent-free epoxy graphene zinc powder coating comprises 20-80 parts of active epoxy resin, 3-8 parts of powdered graphene, 20-35 parts of polyaminoamide resin, 3-8 parts of a thixotropic agent, 4-10 parts of a filler, 5-12 parts of an anticorrosion aid and 10-25 parts of a repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder with a volume ratio of 2-5: 10.
Description
Technical Field
The invention relates to the technical field of industrial coatings, and particularly relates to a solvent-free epoxy graphene zinc powder coating and a preparation method thereof.
Background
Chemical storage tanks, pipelines, bridge steel structures, marine equipment, energy and power, equipment manufacturing and other fields, and potential safety hazards are easily generated due to frequent corrosion of internal and external environment media in the use process of some storage tanks, conveying pipelines and steel structures. However, the corrosion of metal and reinforced concrete brings great economic loss and social harm to human beings, even catastrophic accidents, in the chemical industry, petroleum industry, metallurgy industry, electric power industry, mechanical industry and other industries, some equipment and pipelines are corroded due to the existence of corrosive media, and especially high-temperature parts of some equipment can be quickly corroded under the dual action of high temperature and corrosive media.
Disclosure of Invention
In view of the above, the invention provides a solvent-free epoxy graphene zinc powder coating and a preparation method thereof, which solve the above problems.
The technical scheme of the invention is realized as follows: a solvent-free epoxy graphene zinc powder coating comprises the following raw materials in parts by weight: 20-80 parts of active epoxy resin, 3-8 parts of powdery graphene, 20-35 parts of polyaminoamide resin, 3-8 parts of thixotropic agent, 4-10 parts of filler, 5-12 parts of anti-corrosion additive and 10-25 parts of repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder in a volume ratio of 2-5: 10.
Further explaining, the solvent-free epoxy graphene zinc powder coating comprises the following raw materials in parts by weight: 50 parts of active epoxy resin, 5 parts of powdered graphene, 30 parts of polyaminoamide resin, 5 parts of thixotropic agent, 7 parts of filler, 8 parts of anti-corrosion additive and 15 parts of repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder in a volume ratio of 3: 10.
Further, the filler is one or more of talcum powder, barium sulfate, quartz powder and mica powder.
Further, the thixotropic agent is any one of polyamide wax, polyethylene wax, organic bentonite and fumed silica.
Further, the anti-corrosion additive is composed of zinc benzoate, zinc phosphomolybdate and titanium phosphate according to the volume ratio of 2-8:1-3: 5.
Further, the active epoxy resin is prepared by adding epoxy resin into a mixed solution of methanol and ethyl acetate, and reacting for 20-60 min at a magnetic stirring speed of 800-1000 rpm and at a temperature of 40-60 ℃; the volume ratio of the methanol to the ethyl acetate is 2-4: 1.
Further, the modified nano zinc powder is prepared by adding nano zinc powderBall-milling propylene glycol phenyl ether in a high-speed ball mill at the ball-milling rotation speed of 500-1000 rpm for 20-40 min, adding polysaccharide alcohol and deionized water, and introducing inert gas to protect the atmosphere to obtain modified nano zinc powder, wherein the mass-volume ratio of the nano zinc powder to the propylene glycol phenyl ether to the polysaccharide alcohol to the deionized water is 20-50: 8-10: 3-5: 4, the inert gas is one of argon, nitrogen and helium, and the introduction rate is 1-5 cm3/min。
Further, the preparation method of the solvent-free and solvent-free epoxy graphene zinc powder coating comprises the following steps:
s1, mixing the active epoxy resin and the polyaminoamide resin, stirring uniformly at a high speed, adding the repairing agent, and stirring in vacuum with the vacuum degree of 0.5-2.0 multiplied by 10-2Stirring at the stirring speed of 600-800 rpm for 5-12 min under MPa to obtain a mixed material I;
s2, putting the powdery graphene, the thixotropic agent and the filler into a high-speed dispersion machine, wherein the power of the high-speed dispersion machine is 7.5-15 kw, and the rotating speed is 300-1800 r/min to obtain a mixed material II;
and S3, mixing and stirring the mixture I and the mixture II uniformly, adding an anticorrosive additive and a repairing agent, mechanically stirring, and performing high-speed dispersion treatment to obtain the solvent-free epoxy graphene zinc powder coating.
Further, the mechanical stirring speed of S3 is 150-250 rpm, and the stirring time is 15-45 min.
Further, the high-speed dispersing and stirring speed of the S3 is 4000-8000 rpm, and the dispersing time is 10-25 min.
Compared with the prior art, the invention has the beneficial effects that:
the solvent-free epoxy graphene zinc powder coating prepared by the invention has excellent corrosion resistance. Due to the fact that the coating contains graphene, the excellent conductivity of the coating can enable the conductivity of the zinc powder to be enhanced, and the utilization rate of the zinc powder in the dry film coating is improved; meanwhile, the sheet structure of the graphene enables the coating to form a labyrinth effect, and the invasion of an external corrosive medium can be effectively prevented.
The paint has good flexibility and impact resistance, can not crack in a high-low temperature circulating coating under the condition of an ultra-thick film, has tolerance on the surface of a low surface, and has super strong adhesive force. The coating has a self-repairing function on the tiny cracks, so that the coating is not easy to crack and fall off. Has high tolerance to high temperature and high humidity.
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.
The materials, reagents and the like used in the examples of the present invention can be obtained commercially without specific description.
Example 1
A solvent-free epoxy graphene zinc powder coating comprises the following raw materials in parts by weight: 20 parts of active epoxy resin, 3 parts of powdered graphene, 20 parts of polyaminoamide resin, 3 parts of polyamide wax, 4 parts of talcum powder, 5 parts of an anticorrosion assistant and 10 parts of a repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder in a volume ratio of 2:10, and the anticorrosion assistant is composed of zinc benzoate, zinc phosphomolybdate and titanium phosphate in a volume ratio of 2:1: 5;
the active epoxy resin is prepared by adding epoxy resin into a mixed solution of methanol and ethyl acetate, and reacting for 20min at a magnetic stirring speed of 800rpm and at 40 ℃ to obtain the active epoxy resin; the volume ratio of the methanol to the ethyl acetate is 2: 1;
adding propylene glycol phenyl ether into nano zinc powder, performing ball milling in a high-speed ball mill for 20min at the ball milling revolution of 500rpm, adding polysaccharide alcohol and deionized water, introducing inert gas to protect the atmosphere to obtain the modified nano zinc powder, wherein the mass-to-volume ratio of the nano zinc powder to the propylene glycol phenyl ether to the polysaccharide alcohol to the deionized water is 20:8:3:4, the inert gas is nitrogen, and the introduction rate is 1cm3/min；
The preparation method of the solvent-free and solvent-free epoxy graphene zinc powder coating comprises the following steps:
s1, mixing the active epoxy resin and the polyaminoamide resin, stirring uniformly at high speed, adding the repairing agentStirring under vacuum degree of 1.5X 10-2Stirring at the stirring speed of 700rpm for 10min under MPa to obtain a mixed material I;
s2, putting the powdery graphene, the thixotropic agent and the filler into a high-speed dispersion machine, and obtaining a mixed material II by the high-speed dispersion machine at the power of 12kw and the rotating speed of 1000 r/min;
and S3, mixing and stirring the mixture I and the mixture II uniformly, adding an anti-corrosion auxiliary agent and a repairing agent, mechanically stirring at a mechanical stirring speed of 200rpm for 30min, and then performing high-speed dispersion treatment at a stirring speed of 6000rpm for 20min to obtain the solvent-free epoxy graphene zinc powder coating.
Example 2
A solvent-free epoxy graphene zinc powder coating comprises the following raw materials in parts by weight: 80 parts of active epoxy resin, 8 parts of powdery graphene, 35 parts of polyaminoamide resin, 8 parts of polyethylene wax, 10 parts of barium sulfate, 12 parts of an anticorrosion assistant and 25 parts of a repairing agent, wherein the repairing agent is a nano silica sol and modified nano zinc powder with a volume ratio of 5:10, and the anticorrosion assistant is composed of zinc benzoate, zinc phosphomolybdate and titanium phosphate according to a volume ratio of 8:3: 5;
the active epoxy resin is prepared by adding epoxy resin into a mixed solution of methanol and ethyl acetate, and reacting for 60min at a magnetic stirring speed of 1000rpm and 60 ℃ to obtain the active epoxy resin; the volume ratio of the methanol to the ethyl acetate is 4: 1;
adding propylene glycol phenyl ether into nano zinc powder, carrying out ball milling in a high-speed ball mill for 40min at the ball milling rotation speed of 1000rpm, adding polysaccharide alcohol and deionized water, introducing inert gas for protection atmosphere to obtain the modified nano zinc powder, wherein the mass-to-volume ratio of the nano zinc powder to the propylene glycol phenyl ether to the polysaccharide alcohol to the deionized water is 50:10:5:4, the inert gas is argon, and the introduction rate is 5cm3/min；
The preparation method of the solvent-free and solvent-free epoxy graphene zinc powder coating comprises the following steps:
s1, mixing the active epoxy resin and the polyaminoamide resin, stirring at high speed, adding the repairing agent, and stirring in vacuum with the vacuum degree of 1.5 multiplied by 10-2Stirring at the stirring speed of 700rpm for 10min under MPa to obtain a mixed material I;
s2, putting the powdery graphene, the thixotropic agent and the filler into a high-speed dispersion machine, and obtaining a mixed material II by the high-speed dispersion machine at the power of 12kw and the rotating speed of 1000 r/min;
and S3, mixing and stirring the mixture I and the mixture II uniformly, adding an anti-corrosion auxiliary agent and a repairing agent, mechanically stirring at a mechanical stirring speed of 200rpm for 30min, and then performing high-speed dispersion treatment at a stirring speed of 6000rpm for 20min to obtain the solvent-free epoxy graphene zinc powder coating.
Example 3
A solvent-free epoxy graphene zinc powder coating comprises the following raw materials in parts by weight: 60 parts of active epoxy resin, 5 parts of powdered graphene, 30 parts of polyaminoamide resin, 5 parts of organic bentonite, 6 parts of mica powder, 8 parts of an anticorrosion assistant and 22 parts of a repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder with the volume ratio of 3:10, and the anticorrosion assistant is composed of zinc benzoate, zinc phosphomolybdate and titanium phosphate according to the volume ratio of 5:2: 5;
the active epoxy resin is prepared by adding epoxy resin into a mixed solution of methanol and ethyl acetate, and reacting for 40min at a magnetic stirring speed of 900rpm and 50 ℃ to obtain active epoxy resin; the volume ratio of the methanol to the ethyl acetate is 3: 1;
the modified nano-zinc powder is prepared by adding propylene glycol phenyl ether into nano-zinc powder, performing ball milling in a high-speed ball mill at the ball milling revolution speed of 800rpm for 30min, adding polysaccharide alcohol and deionized water, introducing inert gas for protection atmosphere to obtain the modified nano-zinc powder, wherein the mass-volume ratio of the nano-zinc powder to the propylene glycol phenyl ether to the polysaccharide alcohol to the deionized water is 40:9:4:4, the inert gas is argon, and the introduction rate is 3cm3/min；
The preparation method of the solvent-free and solvent-free epoxy graphene zinc powder coating comprises the following steps:
s1, mixing the active epoxy resin and the polyaminoamide resin, stirring uniformly at high speed, adding the repairing agent, and stirring in vacuum with the vacuum degree of 1.5 multiplied by 10-2MPa, the stirring speed is 700rpm, the stirring is carried out for 10min,obtaining a mixed material I;
s2, putting the powdery graphene, the thixotropic agent and the filler into a high-speed dispersion machine, and obtaining a mixed material II by the high-speed dispersion machine at the power of 12kw and the rotating speed of 1000 r/min;
and S3, mixing and stirring the mixture I and the mixture II uniformly, adding an anti-corrosion auxiliary agent and a repairing agent, mechanically stirring at a mechanical stirring speed of 200rpm for 30min, and then performing high-speed dispersion treatment at a stirring speed of 6000rpm for 20min to obtain the solvent-free epoxy graphene zinc powder coating.
Example 4
A solvent-free epoxy graphene zinc powder coating comprises the following raw materials in parts by weight: 60 parts of active epoxy resin, 5 parts of powdered graphene, 30 parts of polyaminoamide resin, 5 parts of fumed silica, 6 parts of quartz powder, 8 parts of an anticorrosion assistant and 22 parts of a repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder in a volume ratio of 3:10, and the anticorrosion assistant is composed of zinc benzoate, zinc phosphomolybdate and titanium phosphate in a volume ratio of 5:2: 5;
the active epoxy resin is prepared by adding epoxy resin into a mixed solution of methanol and ethyl acetate, and reacting for 40min at a magnetic stirring speed of 900rpm and 50 ℃ to obtain the active epoxy resin; the volume ratio of the methanol to the ethyl acetate is 3: 1;
the modified nano-zinc powder is prepared by adding propylene glycol phenyl ether into nano-zinc powder, performing ball milling in a high-speed ball mill at the ball milling revolution speed of 800rpm for 30min, adding polysaccharide alcohol and deionized water, introducing inert gas for protection atmosphere to obtain the modified nano-zinc powder, wherein the mass-volume ratio of the nano-zinc powder to the propylene glycol phenyl ether to the polysaccharide alcohol to the deionized water is 40:9:4:4, the inert gas is argon, and the introduction rate is 3cm3/min；
S1, mixing the active epoxy resin and the polyaminoamide resin, stirring uniformly at high speed, adding the repairing agent, and stirring in vacuum with the vacuum degree of 0.5 multiplied by 10-2Stirring for 5min at the stirring speed of 600rpm under MPa to obtain a mixed material I;
s2, putting the powdery graphene, the thixotropic agent and the filler into a high-speed dispersion machine, wherein the power of the high-speed dispersion machine is 7.5kw, and the rotating speed is 300r/min to obtain a mixed material II;
s3, mixing and stirring the mixture I and the mixture II uniformly, adding an anti-corrosion auxiliary agent and a repairing agent, carrying out mechanical stirring at a mechanical stirring speed of 150rpm for 15min, and then carrying out high-speed dispersion treatment at a stirring speed of 4000rpm for 10min to obtain the solvent-free epoxy graphene zinc powder coating.
Example 5
A solvent-free epoxy graphene zinc powder coating comprises the following raw materials in parts by weight: 60 parts of active epoxy resin, 5 parts of powdered graphene, 30 parts of polyaminoamide resin, 5 parts of fumed silica, 6 parts of barium sulfate, 8 parts of an anticorrosion assistant and 22 parts of a repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder with the volume ratio of 3:10, and the anticorrosion assistant is composed of zinc benzoate, zinc phosphomolybdate and titanium phosphate according to the volume ratio of 5:2: 5;
the active epoxy resin is prepared by adding epoxy resin into a mixed solution of methanol and ethyl acetate, and reacting for 40min at a magnetic stirring speed of 900rpm and 50 ℃ to obtain the active epoxy resin; the volume ratio of the methanol to the ethyl acetate is 3: 1;
the modified nano-zinc powder is prepared by adding propylene glycol phenyl ether into nano-zinc powder, performing ball milling in a high-speed ball mill at the ball milling revolution speed of 800rpm for 30min, adding polysaccharide alcohol and deionized water, introducing inert gas for protection atmosphere to obtain the modified nano-zinc powder, wherein the mass-volume ratio of the nano-zinc powder to the propylene glycol phenyl ether to the polysaccharide alcohol to the deionized water is 40:9:4:4, the inert gas is argon, and the introduction rate is 3cm3/min；
The preparation method of the solvent-free and solvent-free epoxy graphene zinc powder coating comprises the following steps:
s1, mixing the active epoxy resin and the polyaminoamide resin, stirring uniformly at high speed, adding the repairing agent, and stirring in vacuum with the vacuum degree of 1.5 multiplied by 10-2Stirring at the stirring speed of 700rpm for 10min under MPa to obtain a mixed material I;
s2, putting the powdery graphene, the thixotropic agent and the filler into a high-speed dispersion machine, and obtaining a mixed material II by the high-speed dispersion machine at the power of 12kw and the rotating speed of 1000 r/min;
and S3, mixing and stirring the mixture I and the mixture II uniformly, adding an anti-corrosion auxiliary agent and a repairing agent, mechanically stirring at a mechanical stirring speed of 200rpm for 30min, and then performing high-speed dispersion treatment at a stirring speed of 6000rpm for 20min to obtain the solvent-free epoxy graphene zinc powder coating.
Comparative example 1
The difference between the comparative example and the example 3 is that the solvent-free epoxy graphene zinc powder coating comprises the following raw materials in parts by weight: 100 parts of active epoxy resin, 2 parts of powdered graphene, 15 parts of polyaminoamide resin, 10 parts of thixotropic agent, 15 parts of filler, 18 parts of anti-corrosion additive and 30 parts of repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder in a volume ratio of 8: 10; the rest of the procedure was the same as in example 3.
Comparative example 2
The difference between the comparative example and the example 3 is that the raw material of the solvent-free epoxy graphene zinc powder coating does not contain a repairing agent, and the solvent-free epoxy graphene zinc powder coating comprises the following raw materials in parts by weight: 60 parts of active epoxy resin, 5 parts of powdered graphene, 30 parts of polyaminoamide resin, 5 parts of organic bentonite, 6 parts of mica powder and 8 parts of an anticorrosion auxiliary agent, wherein the anticorrosion auxiliary agent is composed of zinc benzoate, zinc phosphomolybdate and titanium phosphate according to a volume ratio of 5:2: 5;
the active epoxy resin is prepared by adding epoxy resin into a mixed solution of methanol and ethyl acetate, and reacting for 40min at a magnetic stirring speed of 900rpm and 50 ℃ to obtain the active epoxy resin; the volume ratio of the methanol to the ethyl acetate is 3: 1;
the modified nano-zinc powder is prepared by adding propylene glycol phenyl ether into nano-zinc powder, performing ball milling in a high-speed ball mill at the ball milling revolution speed of 800rpm for 30min, adding polysaccharide alcohol and deionized water, introducing inert gas for protection atmosphere to obtain the modified nano-zinc powder, wherein the mass-volume ratio of the nano-zinc powder to the propylene glycol phenyl ether to the polysaccharide alcohol to the deionized water is 40:9:4:4, the inert gas is argon, and the introduction rate is 3cm3/min；
The preparation method of the solvent-free and solvent-free epoxy graphene zinc powder coating comprises the following steps:
s1, mixing the active epoxy resin and the polyaminoamide resin, uniformly stirring at a high speed of 700rpm for 10min to obtain a mixed material I;
s2, putting the powdery graphene, the thixotropic agent and the filler into a high-speed dispersion machine, and obtaining a mixed material II by the high-speed dispersion machine at the power of 12kw and the rotating speed of 1000 r/min;
and S3, mixing and stirring the mixture I and the mixture II uniformly, adding an anti-corrosion auxiliary agent and a repairing agent, mechanically stirring at a mechanical stirring speed of 200rpm for 30min, and then performing high-speed dispersion treatment at a stirring speed of 6000rpm for 20min to obtain the solvent-free epoxy graphene zinc powder coating.
Comparative example 3
The difference between the comparative example and the example 3 is that the solvent-free epoxy graphene zinc powder coating does not contain an anticorrosion additive, and specifically is a solvent-free epoxy graphene zinc powder coating which comprises the following raw materials in parts by weight: 60 parts of active epoxy resin, 5 parts of powdered graphene, 30 parts of polyaminoamide resin, 5 parts of organic bentonite, 6 parts of mica powder and 22 parts of a repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder in a volume ratio of 3: 10;
the active epoxy resin is prepared by adding epoxy resin into a mixed solution of methanol and ethyl acetate, and reacting for 40min at a magnetic stirring speed of 900rpm and 50 ℃ to obtain the active epoxy resin; the volume ratio of the methanol to the ethyl acetate is 3: 1;
the modified nano-zinc powder is prepared by adding propylene glycol phenyl ether into nano-zinc powder, performing ball milling in a high-speed ball mill at the ball milling revolution speed of 800rpm for 30min, adding polysaccharide alcohol and deionized water, introducing inert gas for protection atmosphere to obtain the modified nano-zinc powder, wherein the mass-volume ratio of the nano-zinc powder to the propylene glycol phenyl ether to the polysaccharide alcohol to the deionized water is 40:9:4:4, the inert gas is argon, and the introduction rate is 3cm3/min；
The preparation method of the solvent-free and solvent-free epoxy graphene zinc powder coating comprises the following steps:
s1, mixing the active epoxy resin and the polyaminoamide resin, stirring uniformly at high speed, addingAdding repairing agent, and vacuum stirring at vacuum degree of 1.5 × 10-2Stirring at the stirring speed of 700rpm for 10min under MPa to obtain a mixed material I;
s2, putting the powdery graphene, the thixotropic agent and the filler into a high-speed dispersion machine, and obtaining a mixed material II by the high-speed dispersion machine at the power of 12kw and the rotating speed of 1000 r/min;
and S3, mixing and stirring the mixture I and the mixture II uniformly, adding a repairing agent, mechanically stirring at a mechanical stirring speed of 200rpm for 30min, and then performing high-speed dispersion treatment at a stirring speed of 6000rpm for 20min to obtain the solvent-free epoxy graphene zinc powder coating.
Comparative example 4
The difference between the comparative example and the example 3 is that the active epoxy resin in the solvent-free epoxy graphene zinc powder coating is not activated, and the solvent-free epoxy graphene zinc powder coating comprises the following raw materials in parts by weight: 60 parts of epoxy resin, 5 parts of powdered graphene, 30 parts of polyaminoamide resin, 5 parts of organic bentonite, 6 parts of mica powder, 8 parts of an anticorrosion assistant and 22 parts of a repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder with the volume ratio of 3:10, and the anticorrosion assistant is composed of zinc benzoate, zinc phosphomolybdate and titanium phosphate according to the volume ratio of 5:2: 5;
the modified nano-zinc powder is prepared by adding propylene glycol phenyl ether into nano-zinc powder, performing ball milling in a high-speed ball mill at the ball milling revolution speed of 800rpm for 30min, adding polysaccharide alcohol and deionized water, introducing inert gas for protection atmosphere to obtain the modified nano-zinc powder, wherein the mass-volume ratio of the nano-zinc powder to the propylene glycol phenyl ether to the polysaccharide alcohol to the deionized water is 40:9:4:4, the inert gas is argon, and the introduction rate is 3cm3/min；
The preparation method of the solvent-free and solvent-free epoxy graphene zinc powder coating comprises the following steps:
s1, mixing the epoxy resin and the polyaminoamide resin, stirring uniformly at high speed, adding the repairing agent, and stirring in vacuum with the vacuum degree of 1.5 multiplied by 10-2Stirring at the stirring speed of 700rpm for 10min under MPa to obtain a mixed material I;
s2, putting the powdery graphene, the thixotropic agent and the filler into a high-speed dispersion machine, and obtaining a mixed material II by the high-speed dispersion machine at the power of 12kw and the rotating speed of 1000 r/min;
and S3, mixing and stirring the mixture I and the mixture II uniformly, adding an anti-corrosion auxiliary agent and a repairing agent, mechanically stirring at a mechanical stirring speed of 200rpm for 30min, and then performing high-speed dispersion treatment at a stirring speed of 6000rpm for 20min to obtain the solvent-free epoxy graphene zinc powder coating.
First, performance test
The solvent-free epoxy graphene zinc powder coating is subjected to performance test, the salt spray resistance is determined according to GB/T1771-2007, the acid resistance and the alkali resistance are determined according to GB 1763-,
the test results were as follows:
according to the results, the paint with strong anti-corrosion performance is provided, the raw materials are selected according to the scientific proportion, the anti-corrosion auxiliary agent and the repairing agent are prepared, the paint has excellent anti-corrosion performance, and has a self-repairing function on tiny cracks, so that a coating film is not easy to crack and fall off.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A solvent-free epoxy graphene zinc powder coating is characterized in that: the feed comprises the following raw materials in parts by weight: 20-80 parts of active epoxy resin, 3-8 parts of powdery graphene, 20-35 parts of polyaminoamide resin, 3-8 parts of thixotropic agent, 4-10 parts of filler, 5-12 parts of anticorrosion auxiliary agent and 10-25 parts of repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder in a volume ratio of 2-5: 10.
2. The solvent-free epoxy graphene zinc powder coating of claim 1, wherein: the feed comprises the following raw materials in parts by weight: 50 parts of active epoxy resin, 5 parts of powdered graphene, 30 parts of polyaminoamide resin, 5 parts of thixotropic agent, 7 parts of filler, 8 parts of anti-corrosion additive and 15 parts of repairing agent, wherein the repairing agent is nano silica sol and modified nano zinc powder in a volume ratio of 3: 10.
3. The solvent-free epoxy graphene zinc powder coating of claim 1, wherein: the filler is one or more of talcum powder, barium sulfate, quartz powder and mica powder.
4. The solvent-free epoxy graphene zinc powder coating of claim 1, wherein: the thixotropic agent is any one of polyamide wax, polyethylene wax, organic bentonite and fumed silica.
5. The solvent-free epoxy graphene zinc powder coating of claim 1, wherein: the anti-corrosion additive consists of zinc benzoate, zinc phosphomolybdate and titanium phosphate according to the volume ratio of 2-8:1-3: 5.
6. The solvent-free epoxy graphene zinc powder coating of claim 1, wherein: the active epoxy resin is prepared by adding epoxy resin into a mixed solution of methanol and ethyl acetate, and reacting for 20-60 min at a magnetic stirring speed of 800-1000 rpm and at 40-60 ℃ to obtain the active epoxy resin; the volume ratio of the methanol to the ethyl acetate is 2-4: 1.
7. The solvent-free epoxy graphene zinc powder coating of claim 1, wherein: the modified nano-zinc powder is prepared by adding propylene glycol phenyl ether into nano-zinc powder in a high-speed ball millPerforming ball milling, wherein the ball milling rotation number is 500-1000 rpm, the ball milling time is 20-40 min, adding polysaccharide alcohol and deionized water, introducing inert gas to protect the atmosphere, and obtaining modified nano zinc powder, wherein the mass volume ratio of the nano zinc powder to the propylene glycol phenyl ether to the polysaccharide alcohol to the deionized water is 20-50: 8-10: 3-5: 4, the inert gas is one of argon, nitrogen and helium, and the introduction rate is 1-5 cm3/min。
8. The method for preparing a solvent-free epoxy graphene zinc powder coating as defined in any one of claims 1 to 7, wherein: the method comprises the following steps:
s1, mixing the active epoxy resin and the polyaminoamide resin, stirring uniformly at a high speed, adding the repairing agent, and stirring in vacuum with the vacuum degree of 0.5-2.0 multiplied by 10-2Stirring at the stirring speed of 600-800 rpm for 5-12 min under MPa to obtain a mixed material I;
s2, putting the powdery graphene, the thixotropic agent and the filler into a high-speed dispersion machine, wherein the power of the high-speed dispersion machine is 7.5-15 kw, and the rotating speed is 300-1800 r/min to obtain a mixed material II;
and S3, mixing and stirring the mixture I and the mixture II uniformly, adding an anticorrosive additive and a repairing agent, mechanically stirring, and performing high-speed dispersion treatment to obtain the solvent-free epoxy graphene zinc powder coating.
9. The method for preparing a solvent-free epoxy graphene zinc powder coating as claimed in claim 8, wherein: and the mechanical stirring speed of the S3 is 150-250 rpm, and the stirring is carried out for 15-45 min.
10. The method for preparing a solvent-free epoxy graphene zinc powder coating as claimed in claim 8, wherein: and the high-speed dispersing and stirring speed of the S3 is 4000-8000 rpm, and the dispersing time is 10-25 min.
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