CN111978820A - Water-based epoxy protective coating system and preparation method thereof - Google Patents
Water-based epoxy protective coating system and preparation method thereof Download PDFInfo
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- CN111978820A CN111978820A CN202010863847.8A CN202010863847A CN111978820A CN 111978820 A CN111978820 A CN 111978820A CN 202010863847 A CN202010863847 A CN 202010863847A CN 111978820 A CN111978820 A CN 111978820A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 177
- 239000004593 Epoxy Substances 0.000 title claims abstract description 169
- 239000011253 protective coating Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000003973 paint Substances 0.000 claims abstract description 53
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 50
- 239000008367 deionised water Substances 0.000 claims abstract description 50
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 50
- 239000000839 emulsion Substances 0.000 claims abstract description 35
- 239000000945 filler Substances 0.000 claims abstract description 21
- 239000002562 thickening agent Substances 0.000 claims abstract description 14
- 239000000049 pigment Substances 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 6
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract 4
- 238000000227 grinding Methods 0.000 claims description 40
- 239000002994 raw material Substances 0.000 claims description 36
- 239000012752 auxiliary agent Substances 0.000 claims description 27
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 26
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 25
- 238000002156 mixing Methods 0.000 claims description 24
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims description 20
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 17
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 claims description 17
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 15
- -1 calcium-modified aluminum tripolyphosphate Chemical class 0.000 claims description 13
- 239000010445 mica Substances 0.000 claims description 13
- 229910052618 mica group Inorganic materials 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 13
- 239000006229 carbon black Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 11
- CUVLMZNMSPJDON-UHFFFAOYSA-N 1-(1-butoxypropan-2-yloxy)propan-2-ol Chemical compound CCCCOCC(C)OCC(C)O CUVLMZNMSPJDON-UHFFFAOYSA-N 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 239000012855 volatile organic compound Substances 0.000 claims description 8
- 239000004408 titanium dioxide Substances 0.000 claims description 7
- 230000004048 modification Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 229920000768 polyamine Polymers 0.000 claims description 2
- 239000013530 defoamer Substances 0.000 claims 1
- 239000000454 talc Substances 0.000 claims 1
- 229910052623 talc Inorganic materials 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 13
- 150000003839 salts Chemical class 0.000 abstract description 11
- 239000007921 spray Substances 0.000 abstract description 11
- 239000011248 coating agent Substances 0.000 abstract description 8
- 238000001035 drying Methods 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000003595 mist Substances 0.000 abstract 2
- 239000002131 composite material Substances 0.000 abstract 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 10
- 239000002518 antifoaming agent Substances 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000002318 adhesion promoter Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 2
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 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
-
- 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
- C09D5/002—Priming 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
- 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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2272—Ferric oxide (Fe2O3)
-
- 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
-
- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
-
- 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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to a water-based epoxy protective coating system and a preparation method thereof, belongs to the technical field of coatings, and aims to provide a composite water-based coating with strong salt spray resistance and quick drying time, wherein the adopted scheme is as follows: the method comprises the following steps: the water-based epoxy iron oxide red primer and the water-based epoxy light gray intermediate paint comprise: and (2) component A: 32-34.3 parts of water-based epoxy emulsion, 19.75-20.3 parts of pigment, 22-23.3 parts of filler, 2.62-4.92 parts of film-forming additive, 1-2 parts of additive, 0.1-0.2 part of thickening agent and 18-19.23 parts of deionized water; and (B) component: 19.7-21.2 parts of a water-based epoxy curing agent and 1-2.52 parts of deionized water; and a method of preparation; the waterborne epoxy protective coating system prepared by the invention can be used in a high-humidity high-salt-mist environment, the salt mist resistance can reach 1000h, the film forming speed is high, the excellent adhesive force is kept after the film forming, and the environmental protection performance is good.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a water-based epoxy protective coating system and a preparation method thereof.
Background
The epoxy resin is used in the anticorrosive coating, and the share of the liquid resin is the largest, but most of the coatings used in the industry at present are solvent-based coatings, and the pollution is serious, so that the water-based epoxy resin coating becomes a hot spot of research in various countries at present. The water-based epoxy anticorrosive paint has the advantages of a solvent-based epoxy paint, such as excellent adhesive force, small shrinkage of a coating film, high hardness, good wear resistance, excellent electrical insulating property and the like; the organic solvent and VOC content is low, so that air pollution is avoided, and the environmental protection requirement is met; meanwhile, water is used as a dispersion medium, the construction tool can be directly cleaned by water, and the water-based paint is low in price, odorless, non-combustible and safer to store, transport and use.
However, water-based paints dry more slowly than solvent-based paints and have lower salt spray resistance, which limits the use of water-based paints in engineering applications. Particularly in the engineering machinery and rail transit industries, the production beat is fast, the requirement on the overall performance of the water-based coating is high, and the intermediate paint needs to be added to enhance the protective performance of the whole coating.
Disclosure of Invention
The invention overcomes the defects in the prior art, provides the water-based epoxy protective coating system and the preparation method thereof, improves the salt spray resistance of the protective coating system, has excellent adhesive force after film forming, has high drying speed, and is beneficial to market application.
In order to solve the technical problems, the invention adopts the technical scheme that: a waterborne epoxy protective coating system comprising a waterborne epoxy iron red primer and a waterborne epoxy light gray intermediate coat;
the water-based epoxy iron oxide red primer comprises the following raw materials in parts by weight:
the water-based epoxy iron oxide red primer comprises the following components: 33-35 parts of water-based epoxy emulsion, 8-10 parts of iron oxide red, 7.52-8.42 parts of calcium-modified aluminum tripolyphosphate, 20-25 parts of filler, 2-4.65 parts of film-forming aid, 3.68-5 parts of aid, 0.1-0.2 part of thickener and 14.25-18.75 parts of deionized water;
the water-based epoxy iron oxide red primer comprises the following components: 19.55-20.75 parts of water-based epoxy curing agent, 0.6-0.8 part of anti-flash rust agent and 0.87-1.87 part of deionized water;
the mass ratio of the water-based epoxy iron red primer component A to the water-based epoxy iron red primer component B is 4.5: 1;
the water-based epoxy light gray intermediate paint comprises the following raw materials in parts by weight:
the water-based epoxy light gray intermediate paint comprises the following components: 32-34.3 parts of water-based epoxy emulsion, 19.75-20.3 parts of pigment, 22-23.3 parts of filler, 2.62-4.92 parts of film-forming additive, 1-2 parts of additive, 0.1-0.2 part of thickening agent and 18-19.23 parts of deionized water;
the water-based epoxy light gray intermediate paint component B: 19.7-21.2 parts of a water-based epoxy curing agent and 1-2.52 parts of deionized water;
the mass ratio of the water-based epoxy light gray intermediate paint component A to the water-based epoxy light gray intermediate paint component B is 4.5: 1.
The filler is one or more of GB-4 mica powder, 1250-mesh talcum powder or 1250-mesh precipitated barium sulfate; GB-4 mica powder can be made from Chuzhou Gerui mining company Limited responsibility company, and 1250-mesh talcum powder can be made from Chapman chemical company Limited in Fushan; the 1250 mesh precipitated barium sulfate may be produced by xinshu fine chemical company, llc.
The water-based epoxy emulsion is a non-ionic water-based dispersion liquid, the volatile organic compound is less than 4%, and the water-based epoxy emulsion can be dispersed and ground by a high-speed dispersion machine and has good corrosion resistance and water resistance.
The film-forming assistant is one or more of propylene glycol methyl ether and dipropylene glycol butyl ether.
The auxiliary agent is one or more of a defoaming agent, a flatting agent or a dispersing agent.
The thickener may be used as Borchi Gel 0620.
The aqueous epoxy curing agent is a non-ionic aqueous dispersion based on polyamine adduct modification, does not contain VOC, does not have curing time when being mixed with aqueous epoxy emulsion, is quick-drying, has short recoating time and has good corrosion resistance and water resistance.
The iron oxide red may be used as a Lanxess brown inorganic pigment bayer color 4110.
The flash rust inhibitor may be NALZIN FA 179.
The calcium-modified aluminum tripolyphosphate can adopt Hangzhou Haibo antirust pigment CAPP.
The rutile type titanium dioxide can be prepared from BLR-699 of Bayilian group GmbH;
the carbon black can adopt Mitsubishi carbon black MA 100.
A preparation method of a water-based epoxy protective coating system comprises the following steps:
the preparation process of the water-based epoxy iron oxide red primer comprises the following steps:
1) mixing iron oxide red, calcium-modified aluminum tripolyphosphate, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to a fineness of 15-40 mu m to obtain a color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent, an anti-flash rust agent and deionized water to obtain a raw material component B;
4) and adding the component B into the component A, and stirring and mixing to obtain the water-based epoxy iron red primer.
The preparation process of the waterborne epoxy light gray intermediate paint comprises the following steps:
1) mixing rutile type titanium dioxide, carbon black, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to the fineness of 15-40 mu m to obtain color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent and deionized water to obtain a raw material component B;
4) and adding the component B into the component A, and stirring and mixing to obtain the waterborne epoxy light gray intermediate paint.
Grinding by adopting a grinder in the step 1), wherein the grinding speed is 1000-1600 rpm; and (3) dispersing by adopting a dispersing machine, wherein the rotating speed of the dispersing machine is 1200-1700 rpm.
Compared with the prior art, the invention has the following beneficial effects.
The waterborne epoxy protective coating system and the preparation method thereof provided by the invention adopt a phase inversion technology, have excellent corrosion resistance, have the salt spray resistance of 1000h, and can meet the use requirements in a high-humidity high-salt-spray environment.
The water-based epoxy iron oxide red primer and the water-based epoxy light gray intermediate paint prepared by the invention are normal-temperature curing coatings, and a double-emulsion technology is adopted, so that the two components have better compatibility, excellent film-forming performance is realized without adding auxiliary agents such as chelating agents and the like, and excellent adhesive force is maintained after film forming.
And thirdly, a hydrophobic modification technology is adopted, so that the drying speed is very high. The coating does not need to be heated, the surface drying time is 5-10 minutes, the hard drying time is 30-40 minutes, and the film forming speed is high under the condition of 23 ℃.
The volatile organic compound of the aqueous epoxy emulsion in the component A is lower than 4 percent, the aqueous epoxy curing agent in the component B does not contain volatile organic compound, the environment-friendly performance is good, the VOC content of the prepared coating is as low as below 75g/L, the fire hazard is avoided, and the construction performance is good.
Fifthly, the water-based paint prepared by the invention has good mechanical property, the pencil hardness can reach 3H, and the flexibility reaches 1 mm.
Sixthly, the aqueous epoxy protective coating system provided by the invention is aqueous epoxy iron red primer and aqueous epoxy light gray intermediate paint, and various aqueous polyurethane acrylic finish paints can be sprayed on the basis of the intermediate paint according to specific requirements, so that the standards of engineering machinery industry and the like are met.
Detailed Description
The present invention is further illustrated by the following specific examples.
Example 1
A water epoxy protective coating system and a preparation method thereof, comprising water epoxy iron red primer and water epoxy light gray intermediate paint:
the water-based epoxy iron oxide red primer comprises a part A and a part B, and comprises the following raw materials in parts by weight:
a: 35 parts of water-based epoxy emulsion, 10 parts of iron oxide red, 7.52 parts of calcium-modified aluminum tripolyphosphate, 2.4 parts of GB-4 mica powder, 11.2 parts of 1250-mesh talcum powder, 13.8 parts of 1250-mesh precipitated barium sulfate, 1.88 parts of dipropylene glycol butyl ether, 0.12 part of propylene glycol methyl ether, 1 part of adhesion promoter, 0.2 part of defoaming agent, 2 parts of dispersing agent, 0.48 part of flatting agent, 0.15 part of thickening agent and 14.25 parts of deionized water;
b: 20.75 parts of waterborne epoxy curing agent, 0.6 part of anti-flash rust agent and 0.87 part of deionized water;
the water-based epoxy light gray intermediate paint comprises a part A and a part B, and comprises the following raw materials in parts by weight:
a: 34.3 parts of water-based epoxy emulsion, 2.5 parts of dipropylene glycol butyl ether, 0.12 part of propylene glycol methyl ether, 0.22 part of defoaming agent, 1.2 parts of dispersing agent, 0.48 part of flatting agent, 19.5 parts of rutile titanium dioxide, 0.25 part of carbon black, 3.7 parts of GB-4 mica powder, 9.8 parts of 1250-mesh talcum powder, 9.8 parts of 1250-mesh precipitated barium sulfate, 0.13 part of thickening agent and 18 parts of deionized water;
b: 21.2 parts of water-based epoxy curing agent and 1 part of deionized water.
The preparation method of the water-based epoxy iron oxide red primer comprises the following steps:
1) mixing iron oxide red, calcium-modified aluminum tripolyphosphate, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to a fineness of 30 mu m to obtain a color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent, an anti-flash rust agent and deionized water to obtain a raw material component B;
4) and adding the component B into the component A, and stirring and mixing to obtain the water-based epoxy iron red primer.
The preparation method of the waterborne epoxy light gray intermediate paint comprises the following steps:
1) mixing rutile type titanium dioxide, carbon black, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to the fineness of 30 mu m to obtain color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent and deionized water to obtain a raw material component B;
4) and adding the component B into the component A, and stirring and mixing to obtain the waterborne epoxy light gray intermediate paint.
Grinding by adopting a grinder in the step 1), wherein the grinding speed is 1600 rpm;
and (3) dispersing by adopting a dispersing machine in the step 2) and the step 3), wherein the rotating speed of the dispersing machine is 1700 rpm.
The properties of the waterborne epoxy protective coating system prepared according to this embodiment are shown in the following table:
TABLE 1 waterborne epoxy iron red primer Properties
TABLE 2 waterborne epoxy light grey intermediate coat Properties
TABLE 3 waterborne epoxy protective coating System Performance
As can be seen from the table, the waterborne epoxy iron red primer and the waterborne epoxy light gray intermediate coat have quick drying, excellent film forming properties and mechanical properties. The salt spray resistance test of the water-based epoxy protective coating system is ISO 7253 according to the standard, the experimental base material is sand washing steel plate (SA 2.5), the curing condition is 14d (23 ℃, 40% RH), the dry film thickness is 88 micrometers, the salt spray resistance is not generated after 1000h, the adhesive force is level 1, and the corrosion width is 1.5 mm. In addition, the water-based epoxy iron oxide red primer and the water-based epoxy light gray intermediate paint keep excellent adhesive force after forming a film.
Example 2
A water epoxy protective coating system and a preparation method thereof, comprising water epoxy iron red primer and water epoxy light gray intermediate paint:
the water-based epoxy iron oxide red primer comprises a part A and a part B, and comprises the following raw materials in parts by weight:
a: 35 parts of water-based epoxy emulsion, 10 parts of iron oxide red, 7.52 parts of calcium-modified aluminum tripolyphosphate, 2.4 parts of GB-4 mica powder, 11.2 parts of 1250-mesh talcum powder, 13.8 parts of 1250-mesh precipitated barium sulfate, 1.88 parts of dipropylene glycol butyl ether, 0.12 part of propylene glycol methyl ether, 1 part of adhesion promoter, 0.2 part of defoaming agent, 2 parts of dispersing agent, 0.48 part of flatting agent, 0.15 part of thickening agent and 14.25 parts of deionized water;
b: 20.75 parts of water-based epoxy curing agent, 0.6 part of anti-flash rust agent and 0.87 part of deionized water.
The water-based epoxy light gray intermediate paint comprises a part A and a part B, and comprises the following raw materials in parts by weight:
a: 34.3 parts of water-based epoxy emulsion, 2.5 parts of dipropylene glycol butyl ether, 0.12 part of propylene glycol methyl ether, 0.22 part of defoaming agent, 1.2 parts of dispersing agent, 0.48 part of flatting agent, 19.5 parts of rutile titanium dioxide, 0.25 part of carbon black, 3.7 parts of GB-4 mica powder, 9.8 parts of 1250-mesh talcum powder, 9.8 parts of 1250-mesh precipitated barium sulfate, 0.13 part of thickening agent and 18 parts of deionized water;
b: 21.2 parts of water-based epoxy curing agent and 1 part of deionized water.
The preparation method of the water-based epoxy iron oxide red primer comprises the following steps:
1) mixing iron oxide red, calcium-modified aluminum tripolyphosphate, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to a fineness of 30 mu m to obtain a color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent, an anti-flash rust agent and deionized water to obtain a raw material component B;
4) and adding the component B into the component A, and stirring and mixing to obtain the water-based epoxy iron red primer.
The preparation method of the waterborne epoxy light gray intermediate paint comprises the following steps:
1) mixing rutile type titanium dioxide, carbon black, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to the fineness of 30 mu m to obtain color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent and deionized water to obtain a raw material component B;
4) and adding the component B into the component A, and stirring and mixing to obtain the waterborne epoxy light gray intermediate paint.
Grinding by adopting a grinder in the step 1), wherein the grinding speed is 1000 rpm; and (3) dispersing by adopting a dispersing machine in the step 2) and the step 3), wherein the rotating speed of the dispersing machine is 1200 rpm.
The performance of the waterborne epoxy protective coating system prepared by the embodiment is not greatly different from the result of the example 1, the analysis reason is that the grinding speed and the dispersion speed are changed, only the grinding and dispersion speed of the pigment and filler is improved or reduced, and the grinding and dispersion are only physical effects, so that the paint performance is not affected, and only the grinding speed is required to be 1000-1600 rpm, and the dispersion rotating speed is required to be within a more proper range of 1200-1700 rpm.
Example 3
A water epoxy protective coating system and a preparation method thereof, comprising water epoxy iron red primer and water epoxy light gray intermediate paint:
the water-based epoxy iron oxide red primer comprises a part A and a part B, and comprises the following raw materials in parts by weight:
a: 35 parts of water-based epoxy emulsion, 10 parts of iron oxide red, 8.42 parts of calcium-modified aluminum tripolyphosphate, 3.7 parts of GB-4 mica powder, 9.8 parts of 1250-mesh talcum powder, 10.2 parts of 1250-mesh precipitated barium sulfate, 2.5 parts of dipropylene glycol butyl ether, 0.15 part of propylene glycol methyl ether, 1.35 parts of adhesion promoter, 0.27 part of defoaming agent, 2.7 parts of dispersing agent, 0.68 part of flatting agent, 0.1 part of thickening agent and 15.13 parts of deionized water;
b: 20.75 parts of water-based epoxy curing agent, 0.6 part of anti-flash rust agent and 0.87 part of deionized water.
The water-based epoxy light gray intermediate paint comprises a part A and a part B, and comprises the following raw materials in parts by weight:
a: 34.3 parts of water-based epoxy emulsion, 2.5 parts of dipropylene glycol butyl ether, 0.12 part of propylene glycol methyl ether, 0.11 part of defoaming agent, 0.65 part of dispersing agent, 0.24 part of flatting agent, 20.043 parts of rutile titanium dioxide, 0.257 part of carbon black, 4 parts of GB-4 mica powder, 9.5 parts of 1250-mesh talcum powder, 9.5 parts of 1250-mesh precipitated barium sulfate, 0.2 part of thickening agent and 18.58 parts of deionized water;
b: 21.2 parts of water-based epoxy curing agent and 1 part of deionized water.
The preparation method of the water-based epoxy iron oxide red primer comprises the following steps:
1) mixing iron oxide red, calcium-modified aluminum tripolyphosphate, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to a fineness of 30 mu m to obtain a color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent, an anti-flash rust agent and deionized water to obtain a raw material component B;
4) and adding the component B into the component A, and stirring and mixing to obtain the water-based epoxy iron red primer.
The preparation method of the waterborne epoxy light gray intermediate paint comprises the following steps:
1) mixing rutile type titanium dioxide, carbon black, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to the fineness of 30 mu m to obtain color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent and deionized water to obtain a raw material component B;
4) and adding the component B into the component A, and stirring and mixing to obtain the waterborne epoxy light gray intermediate paint.
Grinding by adopting a grinder in the step 1), wherein the grinding speed is 1400 rpm; and (3) dispersing by adopting a dispersing machine in the step 2) and the step 3), wherein the rotating speed of the dispersing machine is 1200 rpm.
The performance of the primer and the intermediate paint of the waterborne epoxy protective coating prepared by the embodiment respectively meets the requirements of tables 1 and 2, the salt spray resistance is slightly higher than that of table 3, and the specific table is shown in table 4:
TABLE 4 waterborne epoxy protective coating System Performance
Example 3 compared to example 1, the weight ratio of calcium modified aluminum tripolyphosphate to mica powder increased and the weight ratio of filler precipitated barium sulfate decreased. Mica powder and precipitated barium sulfate belong to extender pigments, play roles in framework and filling in the paint, increase the thickness of a paint film, ensure that the paint film is full and firm, improve the mechanical strength of the paint film, and play an auxiliary role in the chemical properties of the paint film, such as strengthening rust resistance, moisture resistance, flame retardance and the like; the calcium modified aluminum tripolyphosphate belongs to an antirust pigment, namely a functional pigment, the phosphate content of the product is higher than that of zinc phosphate, and the product does not contain a basic component, so that the product has universal anticorrosion performance in many applications. The salt spray resistance of the embodiment can still meet 1000h, the plate surface has no bubbling and rust, and the rust width at the cross scratch is 1.4mm (one-way).
Example 4
A water epoxy protective coating system and a preparation method thereof, comprising water epoxy iron red primer and water epoxy light gray intermediate paint:
the water-based epoxy iron oxide red primer comprises a part A and a part B, and comprises the following raw materials in parts by weight:
a: the water-based epoxy emulsion comprises 33 parts of water-based epoxy emulsion, 8 parts of iron oxide red, 7.52 parts of calcium-modified aluminum tripolyphosphate, 2.4 parts of GB-4 mica powder, 9.8 parts of 1250-mesh talcum powder, 12 parts of 1250-mesh precipitated barium sulfate, 4.5 parts of dipropylene glycol butyl ether, 0.15 part of propylene glycol methyl ether, 1 part of adhesion promoter, 0.2 part of defoaming agent, 2 parts of dispersing agent, 0.48 part of flatting agent, 0.2 part of thickening agent and 18.75 parts of deionized water;
b: 19.55 parts of water-based epoxy curing agent, 0.8 part of anti-flash rust agent and 1.87 parts of deionized water.
The water-based epoxy light gray intermediate paint comprises a part A and a part B, and comprises the following raw materials in parts by weight:
a: the water-based epoxy emulsion comprises 32 parts of water-based epoxy emulsion, 4.8 parts of dipropylene glycol butyl ether, 0.12 part of propylene glycol methyl ether, 0.22 part of defoaming agent, 1.3 parts of dispersing agent, 0.48 part of flatting agent, 19.5 parts of rutile titanium dioxide, 0.25 part of carbon black, 4 parts of GB-4 mica powder, 9 parts of 1250-mesh talcum powder, 9 parts of 1250-mesh precipitated barium sulfate, 0.1 part of thickening agent and 19.23 parts of deionized water;
b: 19.7 parts of water-based epoxy curing agent and 2.52 parts of deionized water.
The preparation method of the water-based epoxy iron oxide red primer comprises the following steps:
1) mixing iron oxide red, calcium-modified aluminum tripolyphosphate, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to a fineness of 30 mu m to obtain a color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent, an anti-flash rust agent and deionized water to obtain a raw material component B;
4) and adding the component B into the component A, and stirring and mixing to obtain the water-based epoxy iron red primer.
The preparation method of the waterborne epoxy light gray intermediate paint comprises the following steps:
1) mixing rutile type titanium dioxide, carbon black, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to the fineness of 30 mu m to obtain color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent and deionized water to obtain a raw material component B;
4) and adding the component B into the component A, and stirring and mixing to obtain the waterborne epoxy light gray intermediate paint.
Grinding by adopting a grinder in the step 1), wherein the grinding speed is 1400 rpm; and (3) dispersing by adopting a dispersing machine in the step 2) and the step 3), wherein the rotating speed of the dispersing machine is 1200 rpm.
Compared with example 1, the resin content is reduced, namely the content of film forming materials is reduced, the pigment ratio is increased, the flexibility of a paint film is slightly lower than that of example 1, and the index requirements of tables 1 and 2 are still met. This embodiment salt spray resistance still can satisfy 1000h, and the face does not have the bubble, does not rust, and cross mar department corrosion width 1.6mm (one-way), specifically sees table 5:
TABLE 5 waterborne epoxy protective coating System Performance
Compared with the example 1, the salt spray resistance is poorer, the analysis reason is that the film forming matter determines the film coating property, and the water-based epoxy emulsion selected by the invention adopts the phase inversion technology and has excellent water resistance and corrosion resistance. The decrease in the resin content tends to result in a decrease in the film properties.
The above embodiments are merely illustrative of the principles of the present invention and its effects, and do not limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications or changes be made by those skilled in the art without departing from the spirit and technical spirit of the present invention, and be covered by the claims of the present invention.
Claims (8)
1. A water-based epoxy protective coating system comprises a water-based epoxy iron oxide red primer and a water-based epoxy light gray intermediate paint,
the water-based epoxy iron oxide red primer comprises the following raw materials in parts by weight:
the water-based epoxy iron oxide red primer comprises the following components: 33-35 parts of water-based epoxy emulsion, 8-10 parts of iron oxide red, 7.52-8.42 parts of calcium-modified aluminum tripolyphosphate, 20-25 parts of filler, 2-4.65 parts of film-forming aid, 3.68-5 parts of aid, 0.1-0.2 part of thickener and 14.25-18.75 parts of deionized water;
the water-based epoxy iron oxide red primer comprises the following components: 19.55-20.75 parts of water-based epoxy curing agent, 0.6-0.8 part of anti-flash rust agent and 0.87-1.87 part of deionized water;
the mass ratio of the water-based epoxy iron red primer component A to the water-based epoxy iron red primer component B is 4.5: 1;
the water-based epoxy light gray intermediate paint comprises the following raw materials in parts by weight:
the water-based epoxy light gray intermediate paint comprises the following components: 32-34.3 parts of water-based epoxy emulsion, 19.75-20.3 parts of pigment, 22-23.3 parts of filler, 2.62-4.92 parts of film-forming additive, 1-2 parts of additive, 0.1-0.2 part of thickening agent and 18-19.23 parts of deionized water;
the water-based epoxy light gray intermediate paint component B: 19.7-21.2 parts of a water-based epoxy curing agent and 1-2.52 parts of deionized water;
the mass ratio of the water-based epoxy light gray intermediate paint component A to the water-based epoxy light gray intermediate paint component B is 4.5: 1.
2. The waterborne epoxy protective coating system of claim 1, wherein the filler is one or more of GB-4 mica powder, 1250 mesh talc or 1250 mesh precipitated barium sulfate.
3. The waterborne epoxy protective coating system of claim 1, wherein the waterborne epoxy emulsion is a non-ionic waterborne dispersion, the volatile organic compound is <4%, and the dispersion and grinding can be carried out by a dispersion machine; the aqueous epoxy curing agent is a non-ionic aqueous dispersion based on polyamine adduct modification, does not contain VOC, and is mixed with an aqueous epoxy emulsion without curing time.
4. The waterborne epoxy protective coating system of claim 1, wherein the film forming aid is one or more of propylene glycol methyl ether and dipropylene glycol butyl ether.
5. The waterborne epoxy protective coating system of claim 1, wherein the auxiliary agent is one or more of a defoamer, a leveling agent or a dispersant.
6. A method of preparing the aqueous epoxy protective coating system according to any one of claims 1 to 5,
the water-based epoxy iron oxide red primer comprises the following steps:
1) mixing iron oxide red, calcium-modified aluminum tripolyphosphate, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to a fineness of 15-40 mu m to obtain a color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent, an anti-flash rust agent and deionized water to obtain a raw material component B;
4) adding the component B into the component A, and stirring and mixing to obtain the water-based epoxy iron oxide red primer;
the water-based epoxy light gray intermediate paint comprises the following steps:
1) mixing rutile type titanium dioxide, carbon black, a filler, an auxiliary agent and deionized water according to a formula, fully grinding, and grinding to the fineness of 15-40 mu m to obtain color paste;
2) dispersing the aqueous epoxy emulsion, the color paste obtained in the step 1) and an auxiliary agent to obtain a raw material component A;
3) dispersing a water-based epoxy curing agent and deionized water to obtain a raw material component B;
4) and adding the component B into the component A, and stirring and mixing to obtain the waterborne epoxy light gray intermediate paint.
7. The method for preparing the water-based epoxy protective coating system according to claim 6, wherein the step 1) is carried out by grinding with a grinder at a speed of 1000-1600 rpm.
8. The preparation method of the water-based epoxy protective coating system according to claim 7, wherein the step 2) and the step 3) are dispersed by a disperser, and the rotation speed of the disperser is 1200-1700 rpm.
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