CN116478596A - Thermosetting container water-based epoxy inner finishing paint/intermediate paint and preparation method thereof - Google Patents
Thermosetting container water-based epoxy inner finishing paint/intermediate paint and preparation method thereof Download PDFInfo
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- CN116478596A CN116478596A CN202310449396.7A CN202310449396A CN116478596A CN 116478596 A CN116478596 A CN 116478596A CN 202310449396 A CN202310449396 A CN 202310449396A CN 116478596 A CN116478596 A CN 116478596A
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- 239000003973 paint Substances 0.000 title claims abstract description 108
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 239000004593 Epoxy Substances 0.000 title claims abstract description 53
- 229920001187 thermosetting polymer Polymers 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 28
- 238000005507 spraying Methods 0.000 claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 239000008367 deionised water Substances 0.000 claims abstract description 20
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 20
- 239000000049 pigment Substances 0.000 claims abstract description 19
- 239000000839 emulsion Substances 0.000 claims abstract description 16
- 238000010276 construction Methods 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 11
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002270 dispersing agent Substances 0.000 claims abstract description 10
- 239000002562 thickening agent Substances 0.000 claims abstract description 10
- 239000000080 wetting agent Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000004806 packaging method and process Methods 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 230000009974 thixotropic effect Effects 0.000 claims abstract description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- 239000003822 epoxy resin Substances 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910002019 Aerosil® 380 Inorganic materials 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- XXBDWLFCJWSEKW-UHFFFAOYSA-N dimethylbenzylamine Chemical compound CN(C)CC1=CC=CC=C1 XXBDWLFCJWSEKW-UHFFFAOYSA-N 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 239000010456 wollastonite Substances 0.000 claims description 3
- 229910052882 wollastonite Inorganic materials 0.000 claims description 3
- UEEJHVSXFDXPFK-UHFFFAOYSA-O N-dimethylethanolamine Chemical compound C[NH+](C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-O 0.000 claims description 2
- 239000013530 defoamer Substances 0.000 claims description 2
- 238000010790 dilution Methods 0.000 claims description 2
- 239000012895 dilution Substances 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000013556 antirust agent Substances 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000000576 coating method Methods 0.000 abstract description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000001035 drying Methods 0.000 abstract description 5
- 239000011701 zinc Substances 0.000 abstract description 5
- 229910052725 zinc Inorganic materials 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 2
- 239000012855 volatile organic compound Substances 0.000 description 8
- 230000007613 environmental effect Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 108060006698 EGF receptor Proteins 0.000 description 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- 229920002396 Polyurea Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 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 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 239000002351 wastewater Substances 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
- 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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of waterborne epoxy internal finishing paint/intermediate paint, in particular to a thermosetting container waterborne epoxy internal finishing paint/intermediate paint and a preparation method thereof. Adding deionized water into a stirring kettle, adding a dispersing agent, a wetting agent, a defoaming agent, a pigment, a filler and a rheological thickener in sequence under stirring, stirring and dispersing for 20-40 min under the condition of 1000-2000 r/min, wherein the test fineness is less than 50 mu m, adding a thermosetting epoxy emulsion, a leveling agent, an anti-flash rust agent and a pH value regulator, and fully stirring, wherein the viscosity of the mixture is controlled to be 15000 mPa.s-30000 mPa.s, the thixotropic index is 2.5-3.5 and the pH value is 7-9; finally, a 200-mesh screen is used for filtering and packaging the product. When in use, the high-pressure airless spraying or air spraying mode is adopted for spraying construction. The thermosetting container water-based epoxy inner finishing paint/intermediate paint prepared by the invention has excellent anti-corrosion performance, low baking temperature and quick drying, and can be used as a matched coating of the thermosetting container water-based epoxy zinc-rich primer.
Description
Technical Field
The invention relates to the technical field of waterborne epoxy internal finishing paint/intermediate paint, in particular to a thermosetting container waterborne epoxy internal finishing paint/intermediate paint and a preparation method thereof.
The background technology is as follows:
the annual production of containers in China is more than 300 ten thousand TEU, the annual production of containers accounts for more than 95 percent of the global container production, the container paint production is about 24 ten thousand tons, solvent paint is adopted in the past, along with the enhancement of environmental protection by people, the development of water-based container paint is started from the beginning of the century, the water-based container paint is popularized for over ten years, and finally the water-based container paint is comprehensively used in the 4 th 2017 month, so that the industry standard specification is formed.
In recent years, environmental protection pressure is gradually increased, in order to lead the healthy development of industry and reduce environmental pollution, enterprises in China container industry association lead industry and jointly sign VOC (volatile organic compound) governing self-discipline, and organization industry is "forbidden oil and water". To ensure orderly execution of the industry's proprietary convention, container industry association has established container water paint related standards, including: the water-based paint for the container JH/T E05-2015, the construction specification of the water-based paint for the container JH/T E-2015, the inspection method and acceptance standard of the water-based paint for the container and the detection method of the VOCs of the water-based paint for the container.
Technical requirements of the water-based paint for the container comprise primer, intermediate paint, inner finishing paint, outer finishing paint, modified underframe paint and the like. The application of the container coating for years proves that the waterborne property of the container coating reduces the volatilization amount of the organic solvent to about 20% of the original volatile amount, is environment-friendly even if a small amount of solvent volatilizes, does not contain solvents with great harm to people, such as benzene, and plays a positive role in relieving environmental protection pressure, guaranteeing health and reducing petroleum dependence.
But also show some drawbacks of aqueous tank paints, mainly: 1. about 10% of VOCs exist, which brings difficulty to waste gas and waste water treatment; 2. paint mist generated by bi-component epoxy spraying cannot be recycled, waste residues are formed, the utilization rate of the paint is reduced, and the cost is increased; 3. the addition of construction water is easy to generate sagging, bubbles, pinholes and other defects in baking, so that the coating difficulty is increased; 4. the waste water treatment cost is improved by more than 10 yuan/TEU compared with that of solvent-based paint (less than 5 yuan/TEU) due to the use of various and more consumed chemicals, and the waste residue of the water-based zinc-rich primer can still be treated according to dangerous waste due to lead in zinc powder.
Chinese patent (publication No. CN 104762000A) discloses a salt spray resistant water container and environment-friendly metallic paint thereof, wherein the outer surface of an outer container body of the container is coated with outer paint, the outer paint comprises three components, primer, intermediate paint and outer paint, the primer adopts water-based epoxy zinc-rich primer, the intermediate paint adopts water-based flaky iron red epoxy intermediate paint, the outer paint adopts water-based acrylic polyurethane enamel, the inner surface of the container is coated with inner paint, the inner paint comprises two components of primer and top paint, the primer is the same as the water-based epoxy zinc-rich primer on the outer side of the outer container body, the top paint is a mixture of the water-based epoxy inner paint and the intermediate paint, the chassis is coated with chassis paint, the chassis paint comprises two components, the primer and the top paint, and each surface of the container is coated with different paint, so that the rust prevention and corrosion prevention functions of the container are met, the cost can be reduced, each paint is green environment-friendly paint, and the emission of VOC to atmosphere is reduced.
The current container industry is a substitute for the tested water-based paint, including powder paint, polyurea paint, electrophoretic paint, etc., but the pain point of the current epoxy water-based paint construction is not solved due to the special process, special equipment, high-temperature baking at 180 ℃ and the like.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention aims to provide a thermosetting container water-based epoxy inner finishing paint/intermediate paint and a preparation method thereof, which have excellent anti-corrosion performance, low baking temperature and quick drying, and can be used as a matched coating of a thermosetting container water-based epoxy zinc-rich primer.
The technical scheme of the invention is as follows:
the water-based epoxy internal finishing paint/intermediate paint of the thermosetting container is of a single-component thermosetting type, and is cured by baking, and the water-based epoxy internal finishing paint/intermediate paint comprises the following specific formula in percentage by mass:
deionized water 5-15%
30 to 50 percent of thermosetting epoxy emulsion
0.5 to 1.5 percent of flash rust resistant agent
pH regulator 0.5-1.5%.
The dispersant is but not limited to TEGO Dispers6226, BYK-190 or Afcona-4010, the wetting agent is but not limited to TEGO Dispers 4100, BYK-346 or Afcona-3590, the rheological thickener is but not limited to AEROSIL 380, BYK-410 or Gel-0620, the leveling agent is but not limited to TEGO Dispers 450W, BYK-333 or Afcona-3580, the defoamer is but not limited to TEGO Dispers 810, BYK-024 or Afcona-2508, and the anti-flash rust agent is but not limited to raybo 60, CK-34 or R-706F.
The thermosetting container water-based epoxy inner finishing paint/intermediate paint is prepared from rutile type titanium dioxide, anatase type titanium dioxide, pigment carbon black, pigment iron oxide red or pigment iron oxide yellow.
The filler is but not limited to precipitated barium sulfate, sericite, heavy calcium carbonate, light calcium carbonate, talcum powder, kaolin, wollastonite powder or quartz powder.
The thermosetting epoxy resin emulsion is, but not limited to, EP-4150, EP-420, EP-304, EP-305 or EP-44 aqueous epoxy resin emulsion.
The pH regulator is but not limited to N, N dimethyl ethanolamine, triethylamine or N, N dimethyl benzyl amine.
The preparation method of the thermosetting container water-based epoxy inner finishing paint/intermediate paint comprises the following steps: adding deionized water into a stirring kettle, adding a dispersing agent, a wetting agent, a defoaming agent, a pigment, a filler and a rheological thickener in sequence under stirring, stirring and dispersing for 20-40 min under the condition of 1000-2000 r/min, wherein the test fineness is less than 50 mu m, adding a thermosetting epoxy emulsion, a leveling agent, an anti-flash rust agent and a pH value regulator, and fully stirring, wherein the viscosity of the mixture is controlled to be 15000 mPa.s-30000 mPa.s, the thixotropic index is 2.5-3.5 and the pH value is 7-9; finally, a 200-mesh screen is used for filtering and packaging the product.
The preparation method of the thermosetting container water-based epoxy inner finishing paint/intermediate paint comprises the steps of diluting with deionized water to adjust viscosity or preheating at 60-70 ℃ to reduce the viscosity and reduce the consumption of deionized water when in use; the high-pressure airless spraying or air spraying is adopted for spraying construction, the water is firstly baked at 60-70 ℃ to remove the water, and then baked at 110-130 ℃ for 8-12 minutes to achieve complete solidification.
The design idea of the invention is as follows:
aiming at the performance requirements of the container water-based epoxy internal finishing paint/intermediate paint and the defects of the current water-based epoxy internal finishing paint/intermediate paint, the invention abandons the original double-component epoxy technical route, adopts 0VOC thermosetting epoxy emulsion to be prepared by dispersing with various pigments, fillers and auxiliary agents, the auxiliary agents are also selected (or treated) to contain no solvent, the curing reaction is avoided at normal temperature, the curing and crosslinking can be realized only by spraying film forming and baking, and the paint mist can be recycled.
Compared with the prior art, the invention has the following advantages:
1. the invention solves the VOC problem of the container water-based epoxy inner finishing paint/intermediate paint, realizes the VOC emission approaching 0, and can greatly reduce the treatment cost of waste gas and waste water.
2. The invention solves the problem of waste residue, paint mist can be fully recycled, and the recycling of the paint mist is convenient due to the absence of an organic solvent, so that the utilization rate is expected to be improved to more than 90%, and the cost and the environmental protection pressure are reduced.
3. The invention can finish the upgrade of the coating line by properly increasing the baking temperature without modifying the existing coating line, thereby reducing the investment.
4. The viscosity of the water-based epoxy inner finishing paint/intermediate paint can be reduced by preheating during construction, and the addition of water is reduced, so that the defect of a coating film and the energy consumption are reduced.
Detailed Description
In a specific implementation process, the invention provides a preparation method of a thermosetting container water-based epoxy inner finishing paint/intermediate paint, which comprises the following steps:
adding deionized water into a stirring kettle, sequentially adding a dispersing agent, a wetting agent, a defoaming agent, a pigment, a filler and a rheological thickener under stirring, stirring and dispersing for 30min under the condition of 1500r/min, adding a thermosetting epoxy emulsion, a leveling agent, an anti-flash rust agent and a pH value regulator, fully stirring, controlling the viscosity of the mixture to be 15000 mPa.s-30000 mPa.s, controlling the thixotropic index to be 2.5-3.5 and controlling the pH value to be 7-9. Finally, a 200-mesh screen is used for filtering and packaging the product. When in use, deionized water is used for dilution and adjustment of viscosity, and the viscosity can be reduced by preheating at 60-70 ℃ so as to reduce the consumption of deionized water. The high-pressure airless spraying or air spraying mode is adopted for spraying construction, the water is firstly removed by baking at 60-70 ℃, and then the baking is carried out for 10 minutes at 120 ℃ to achieve complete solidification.
Among the dispersants are, but are not limited to, TEGO Dispers6226 from Digao, BYK-190 from Pick chemistry, and Afcona-4010 from Eiff Ke Na. Wetting agents are, but are not limited to, TEGO Dispers 4100 from Digao, BYK-346 from Pick chemistry, and Afcona-3590 from Eff Ke Na. Pigments are, but are not limited to, rutile titanium dioxide, anatase titanium dioxide, pigment carbon black, pigment iron oxide red, pigment iron oxide yellow, and the like. Fillers are, but are not limited to, precipitated barium sulfate, sericite, ground calcium carbonate, light calcium carbonate, talc, kaolin, wollastonite powder, quartz powder, and the like. Rheological thickeners are, but are not limited to, AEROSIL 380 from Desoxhlet, BYK-410 from Pick chemistry, and Gel-0620 from DOW. Leveling agents are, but are not limited to, TEGO Dispers 450W from Digao, BYK-333 from Pick chemistry, and Afcona-3580 from Egfr Ke Na. Defoamers are, but are not limited to, TEGO Dispers 810 from Digao, BYK-024 from Pick chemistry, and Afcona-2508 from Eff Ke Na. The thermosetting epoxy emulsion is, but is not limited to, EP-4150 aqueous epoxy resin emulsion from Guangzhou Hei New materials, inc., but also can be a similar commercial product from other companies, such as: EP-420, EP-304 and EP-305 aqueous epoxy resin emulsion of Guangdong flower and fruit mountain environmental protection technology Co., ltd. Anti-flash rust agents are, but are not limited to, raybo 60 from Rainbow, enzernike chemical CK-34 and R-706F from Ki chemical. pH modifiers are, but are not limited to, N dimethylethanolamine, triethylamine, and N, N dimethylbenzylamine.
The present invention will be described in further detail with reference to examples.
Example 1
The embodiment provides a thermosetting container water-based epoxy internal finishing paint/intermediate paint which is single-component thermosetting and is cured by baking, wherein the specific formula comprises the following components in percentage by mass:
the preparation process comprises the following steps:
adding deionized water into a stirring kettle, adding a dispersing agent, a wetting agent, a defoaming agent, a pigment, a filler and a rheological thickener in sequence under stirring, stirring and dispersing for 30min under the condition of 1500r/min, testing the fineness below 50 mu m, adding EP-4150 epoxy emulsion, a leveling agent, an anti-flash rust agent and a pH value regulator, fully stirring, controlling the viscosity of the mixture to 20000 Pa.s, controlling the thixotropic index to 3.0 and controlling the pH value to 8. Finally, a 200-mesh screen is used for filtering and packaging the product. When in use, the deionized water is used for diluting and adjusting the viscosity under the preheating condition at 65 ℃ so as to reduce the viscosity and reduce the dosage of the deionized water. The high-pressure airless spraying or air spraying mode is adopted for spraying construction, the water is firstly removed by baking under the condition of 65 ℃, and then the baking is carried out for 10 minutes under the condition of 120 ℃ drying, so that the complete solidification is achieved.
Example 2
The embodiment provides a thermosetting container water-based epoxy internal finishing paint/intermediate paint which is single-component thermosetting and is cured by baking, wherein the specific formula comprises the following components in percentage by mass:
the preparation process comprises the following steps:
adding deionized water into a stirring kettle, adding a dispersing agent, a wetting agent, a defoaming agent, a pigment, a filler and a rheological thickener in sequence under stirring, stirring and dispersing for 30min under 1500r/min, testing fineness below 50 mu m, adding EP-420 water-based epoxy resin emulsion, a leveling agent, an anti-flash rust agent and a pH value regulator, fully stirring, controlling the viscosity of the mixture to 16000mPa.s, controlling the thixotropic index to be 2.5 and controlling the pH value to be 7.2. Finally, a 200-mesh screen is used for filtering and packaging the product. When in use, the viscosity is diluted and adjusted by deionized water under the preheating condition at 62 ℃ so as to reduce the viscosity and reduce the dosage of the deionized water. The high-pressure airless spraying or air spraying mode is adopted for spraying construction, the water is firstly removed by baking under the condition of 62 ℃, and then the baking is carried out for 10 minutes under the condition of 120 ℃ drying, so that the complete solidification is achieved.
Example 3
The embodiment provides a thermosetting container water-based epoxy internal finishing paint/intermediate paint which is single-component thermosetting and is cured by baking, wherein the specific formula comprises the following components in percentage by mass:
the preparation process comprises the following steps:
adding deionized water into a stirring kettle, adding a dispersing agent, a wetting agent, a defoaming agent, a pigment, a filler and a rheological thickener in sequence under stirring, stirring and dispersing for 30min under 1500r/min, testing fineness to be less than 50 mu m, adding EP-305 aqueous epoxy resin emulsion, a leveling agent, an anti-flash rust agent and a pH value regulator, fully stirring, controlling the viscosity of the mixture to be 26000mPa.s, controlling the thixotropic index to be 3.5 and controlling the pH value to be 8.7. Finally, a 200-mesh screen is used for filtering and packaging the product. When in use, the viscosity is diluted and adjusted by deionized water under the preheating condition at 68 ℃ so as to reduce the viscosity and reduce the dosage of the deionized water. The high-pressure airless spraying or air spraying mode is adopted for spraying construction, the water is firstly removed by baking at 68 ℃, and then the baking is carried out for 10 minutes under the drying condition of 120 ℃ to achieve complete solidification.
Comparative example:
the current container water-based epoxy inner finishing paint/intermediate paint comprises a component A and a component B, and is mixed according to the proportion during use, and the specific formula is as follows:
the component A comprises the following components in percentage by mass:
the component B comprises the following components in percentage by mass:
100% of aqueous epoxy hardener (solid content 40 wt.%)
The construction proportion is as follows:
component A: component b=100: 10 (mass ratio)
Test data for examples and comparative examples are as follows:
the example results show that the thermosetting container water-based epoxy inner finishing paint/intermediate paint prepared by the invention has stronger salt fog resistance than the prior art, thereby improving the protection period of the coating; no cosolvent is contained, so that VOC is close to 0, and the environment protection and the waste gas and waste water treatment are facilitated; the waste residue can be reused due to the fact that the epoxy inner finishing paint cannot be solidified at normal temperature, and the utilization rate of the water-based epoxy inner finishing paint/intermediate paint is expected to be improved to more than 90%.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the present invention should be made and all equivalent substitutions are intended to be included in the scope of the present invention.
Claims (8)
1. The water-based epoxy internal finishing paint/intermediate paint of the thermosetting container is characterized in that the water-based epoxy internal finishing paint/intermediate paint is a single-component thermosetting type, and is cured by baking, and the specific formula is as follows:
2. the thermosetting container waterborne epoxy inner/intermediate paint according to claim 1, wherein the dispersant is, but not limited to, TEGO Dispers6226, BYK-190 or Afcona-4010, the wetting agent is, but not limited to, TEGO Dispers 4100, BYK-346 or Afcona-3590, the rheological thickener is, but not limited to, AEROSIL 380, BYK-410 or Gel-0620, the leveling agent is, but not limited to, TEGO Dispers 450W, BYK-333 or Afcona-3580, the defoamer is, but not limited to, TEGO Dispers 810, BYK-024 or Afcona-2508, and the anti-rust agent is, but not limited to, raybo 60, CK-34 or R-706F.
3. The waterborne epoxy inner/intermediate paint for a thermoset container according to claim 1, wherein the pigment is, but not limited to, rutile titanium dioxide, anatase titanium dioxide, pigment carbon black, pigment iron oxide red or pigment iron oxide yellow.
4. A thermosetting container waterborne epoxy inner/intermediate paint according to claim 1, wherein the filler is, but not limited to, precipitated barium sulphate, sericite, heavy calcium carbonate, light calcium carbonate, talc, kaolin, wollastonite powder or quartz powder.
5. The thermosetting container waterborne epoxy inner/intermediate paint according to claim 1, wherein the thermosetting epoxy emulsion is, but not limited to, EP-4150, EP-420, EP-304, EP-305 or EP-44 waterborne epoxy resin emulsion.
6. The waterborne epoxy inner/intermediate paint for a thermoset container according to claim 1, wherein the pH adjustor is, but not limited to, N dimethylethanolamine, triethylamine or N, N dimethylbenzylamine.
7. A method for preparing the thermosetting container waterborne epoxy inner/intermediate paint according to any one of claims 1 to 6, comprising the following steps: adding deionized water into a stirring kettle, adding a dispersing agent, a wetting agent, a defoaming agent, a pigment, a filler and a rheological thickener in sequence under stirring, stirring and dispersing for 20-40 min under the condition of 1000-2000 r/min, wherein the test fineness is less than 50 mu m, adding a thermosetting epoxy emulsion, a leveling agent, an anti-flash rust agent and a pH value regulator, and fully stirring, wherein the viscosity of the mixture is controlled to be 15000 mPa.s-30000 mPa.s, the thixotropic index is 2.5-3.5 and the pH value is 7-9; finally, a 200-mesh screen is used for filtering and packaging the product.
8. The method for preparing the thermosetting container water-based epoxy inner finishing paint/intermediate paint, according to claim 7, wherein when in use, deionized water is used for dilution and adjustment of viscosity, or the use amount of deionized water is reduced by preheating at 60-70 ℃; the high-pressure airless spraying or air spraying is adopted for spraying construction, the water is firstly baked at 60-70 ℃ to remove the water, and then baked at 110-130 ℃ for 8-12 minutes to achieve complete solidification.
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| CN114958141A (en) * | 2022-05-31 | 2022-08-30 | 紫荆花涂料（上海）有限公司 | Single-component water-based epoxy primer for curtain coating and preparation method thereof |
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| CN110054958A (en) * | 2018-12-21 | 2019-07-26 | 广州歌莉斯化工科技有限公司 | A kind of preparation method and application of extra-weather-proof aqueous one-component anti-corrosive primer |
| CN109762443A (en) * | 2019-01-15 | 2019-05-17 | 亚士漆(上海)有限公司 | A kind of coating and its preparation method and application of water-based mono-component bottom surface unification |
| CN112812271A (en) * | 2021-01-27 | 2021-05-18 | 佛山市粤涂源新材料有限公司 | Water-based self-dispersing epoxy resin with dual curing effect and preparation method and application thereof |
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