CN115558373B - Water-based epoxy primer for rail transit and preparation method thereof - Google Patents
Water-based epoxy primer for rail transit and preparation method thereof Download PDFInfo
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- CN115558373B CN115558373B CN202211243525.9A CN202211243525A CN115558373B CN 115558373 B CN115558373 B CN 115558373B CN 202211243525 A CN202211243525 A CN 202211243525A CN 115558373 B CN115558373 B CN 115558373B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 239000004593 Epoxy Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000000049 pigment Substances 0.000 claims abstract description 49
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 35
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 27
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical group [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 25
- 239000000741 silica gel Substances 0.000 claims abstract description 24
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 24
- -1 siloxane modified silica gel Chemical class 0.000 claims abstract description 23
- 239000008367 deionised water Substances 0.000 claims abstract description 16
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 16
- 239000002562 thickening agent Substances 0.000 claims abstract description 16
- 238000005342 ion exchange Methods 0.000 claims abstract description 15
- 239000006184 cosolvent Substances 0.000 claims abstract description 14
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 239000000080 wetting agent Substances 0.000 claims abstract description 12
- 239000000839 emulsion Substances 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 10
- 239000013530 defoamer Substances 0.000 claims abstract description 8
- 239000002987 primer (paints) Substances 0.000 claims description 46
- 238000002156 mixing Methods 0.000 claims description 28
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 238000005406 washing Methods 0.000 claims description 20
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 230000002401 inhibitory effect Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- 229910052791 calcium Inorganic materials 0.000 claims description 8
- 239000011575 calcium Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 235000019353 potassium silicate Nutrition 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 8
- 125000003700 epoxy group Chemical group 0.000 claims description 7
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 6
- 239000007822 coupling agent Substances 0.000 claims description 6
- 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 6
- 239000000706 filtrate Substances 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 5
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- 229920000388 Polyphosphate Polymers 0.000 claims description 4
- 125000005375 organosiloxane group Chemical group 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- 239000001205 polyphosphate Substances 0.000 claims description 4
- 235000011176 polyphosphates Nutrition 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 235000010215 titanium dioxide Nutrition 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 3
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 claims description 2
- 125000003158 alcohol group Chemical group 0.000 claims description 2
- MHLMPARDYWGGLE-UHFFFAOYSA-K aluminum;zinc;phosphate Chemical compound [Al+3].[Zn+2].[O-]P([O-])([O-])=O MHLMPARDYWGGLE-UHFFFAOYSA-K 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- OHOBJYLZBONBBA-UHFFFAOYSA-N strontium zinc Chemical compound [Zn+2].[Sr+2] OHOBJYLZBONBBA-UHFFFAOYSA-N 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 abstract description 14
- 238000000576 coating method Methods 0.000 abstract description 11
- 239000002253 acid Substances 0.000 abstract description 9
- 239000000853 adhesive Substances 0.000 abstract description 9
- 230000001070 adhesive effect Effects 0.000 abstract description 9
- 239000003513 alkali Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 9
- 239000007921 spray Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 125000002467 phosphate group Chemical class [H]OP(=O)(O[H])O[*] 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 7
- 230000007935 neutral effect Effects 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 230000002829 reductive effect Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 6
- 239000003973 paint Substances 0.000 description 5
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000003607 modifier Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- DMKSVUSAATWOCU-HROMYWEYSA-N loteprednol etabonate Chemical compound C1CC2=CC(=O)C=C[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@@](C(=O)OCCl)(OC(=O)OCC)[C@@]1(C)C[C@@H]2O DMKSVUSAATWOCU-HROMYWEYSA-N 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- CUVLMZNMSPJDON-UHFFFAOYSA-N 1-(1-butoxypropan-2-yloxy)propan-2-ol Chemical compound CCCCOCC(C)OCC(C)O CUVLMZNMSPJDON-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229930194936 Tylosin Natural products 0.000 description 1
- 239000004182 Tylosin Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 description 1
- WBPYTXDJUQJLPQ-VMXQISHHSA-N tylosin Chemical compound O([C@@H]1[C@@H](C)O[C@H]([C@@H]([C@H]1N(C)C)O)O[C@@H]1[C@@H](C)[C@H](O)CC(=O)O[C@@H]([C@H](/C=C(\C)/C=C/C(=O)[C@H](C)C[C@@H]1CC=O)CO[C@H]1[C@@H]([C@H](OC)[C@H](O)[C@@H](C)O1)OC)CC)[C@H]1C[C@@](C)(O)[C@@H](O)[C@H](C)O1 WBPYTXDJUQJLPQ-VMXQISHHSA-N 0.000 description 1
- 229960004059 tylosin Drugs 0.000 description 1
- 235000019375 tylosin Nutrition 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
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
-
- 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
- C08K3/20—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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
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 discloses a water-based epoxy primer for rail transit and a preparation method thereof, belonging to the technical field of coatings. The waterborne epoxy primer of the present invention includes a A, B component; the component A comprises 30-55 parts of aqueous epoxy emulsion, 1-5 parts of cosolvent, 3-15 parts of antirust pigment, 0.1-1 part of flatting agent, 0.1-1 part of thickener, 8-30 parts of pigment and filler, 0.1-0.5 part of defoamer, 0.1-0.5 part of wetting agent, 0.5-1.5 part of dispersing agent and 8-30 parts of deionized water; the component B comprises 50-70 parts of aqueous epoxy curing agent, 5-20 parts of anti-flash rust agent and 10-30 parts of deionized water; the rust-proof pigment comprises calcium ion exchange silica gel, organic siloxane modified silica gel and modified phosphate rust-proof pigment; the water-based epoxy primer has excellent salt spray resistance, acid resistance, alkali resistance and good adhesive force, can be effectively applied to the field of rail transit coatings, and has an effective protection effect on transit rails; the preparation method of the water-based primer provided by the invention is simple and can be practically applied to actual production.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to an aqueous epoxy primer for rail transit and a preparation method thereof.
Background
The vast majority of current paints for rail transit are still traditional solvent-based paints, with a annual usage of 1-2 ten thousand tons. However, the VOC content is high, which causes serious injury to the body and the ecological environment of practitioners, and becomes a serious pollution source.
In recent years, under the strong promotion of national environmental protection policies, "oil-to-water" becomes an irreversible trend. The demand for water-based paint in the rail transit industry is also increasing. Since 2010, there is a report of water-based paint coating on export subways, motor cars, trucks, urban rails and the like are sequentially coated with water-based paint. The current water-based degree of the industry is 10-20%, and a wide growing space is available in the future. The water-based epoxy primer for rail transit is taken as a root of the whole matched coating, and plays a vital role in the corrosion resistance of the coating. The salt spray resistance is a core index of good corrosion resistance of the coating, so that the water-based epoxy primer with excellent salt spray resistance for rail transit is significant.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the water-based epoxy primer for the rail transit, which has excellent salt spray resistance, acid resistance and alkali resistance and good adhesive force, and a preparation method thereof.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the water-based epoxy primer for the rail transit comprises an A component and a B component, wherein the mass ratio of the A component to the B component is (4-6): 1, a step of; the component A comprises the following components in parts by mass: 30-55 parts of aqueous epoxy emulsion, 1-5 parts of cosolvent, 3-15 parts of antirust pigment, 0.1-1 part of flatting agent, 0.1-1 part of thickener, 8-25 parts of pigment filler, 0.1-0.5 part of defoamer, 0.1-0.5 part of wetting agent, 0.5-1.5 part of dispersing agent and 8-20 parts of deionized water; the component B comprises the following components in parts by mass: 50-70 parts of aqueous epoxy curing agent, 5-20 parts of anti-flash rust agent and 10-30 parts of deionized water; the rust-proof pigment comprises calcium ion exchange silica gel, organic siloxane modified silica gel and modified phosphate rust-proof pigment; the mass ratio of the calcium ion exchange silica gel, the organic siloxane modified silica gel and the modified phosphate rust-proof pigment is that the calcium ion exchange silica gel: organosiloxane modified silica gel: modified phosphate type rust inhibitive pigment= (3-4): (1-3): (3-4).
According to the water-based epoxy primer for the track traffic, the component A and the component B are formed by selecting proper parts by mass of raw materials, so that the prepared water-based epoxy primer has excellent salt spray resistance, acid resistance and alkali resistance and good adhesive force; specifically, in the anti-rust pigment added in the invention, the calcium ion exchange silica gel is a product obtained by modifying the surface of the silica gel by utilizing calcium ions, on one hand, corrosion ions can be adsorbed on the surface and released, so that the attack of the corrosion ions on a substrate is reduced, and on the other hand, the slightly dissolved silicate ions can be combined with the calcium ions and iron ions on the surface of the substrate to generate a compact silicate passivation film, so that the protection effect is achieved; the organic siloxane modified silica gel is a product obtained by modifying the surface of the silica gel by adopting organic siloxane, and the surface of the organic siloxane modified silica gel contains epoxy groups, so that the compatibility with a resin system can be improved, the compactness of a coating is further enhanced, and an excellent anti-corrosion effect is achieved; the modified phosphate type antirust pigment can hydrolyze under certain conditions to release polyphosphate with strong complexing ability, and the released polyphosphate reacts with iron ions to generate a indissolvable protective film, so that the anticorrosion effect is achieved; namely, the three components in the anti-rust pigment added in the invention can be mutually cooperated, and excellent salt spray resistance, acid resistance and alkali resistance and good adhesive force can be achieved under the provided coating system.
As a preferred embodiment of the waterborne epoxy primer for rail transit of the present invention, the a component comprises the following components in parts by mass: 40-45 parts of aqueous epoxy emulsion, 3-5 parts of cosolvent, 9-12 parts of antirust pigment, 0.1-1 part of flatting agent, 0.1-1 part of thickener, 9-12 parts of pigment filler, 0.1-0.5 part of defoamer, 0.1-0.5 part of wetting agent, 0.5-1.5 part of dispersing agent and 8-20 parts of deionized water; the component B comprises the following components in parts by mass: 60-65 parts of aqueous epoxy curing agent, 14-16 parts of anti-flash rust agent and 15-25 parts of deionized water.
The inventors have found that when the components of the a component and the B component are within the above ranges, the resultant waterborne epoxy primer is more excellent in combination properties.
As a preferred embodiment of the water-based epoxy primer for rail transit of the present invention, the mass ratio of the calcium ion-exchanged silica gel, the organosiloxane-modified silica gel and the modified phosphate-based rust-preventive pigment is: organosiloxane modified silica gel: modified phosphate rust inhibitive pigment = 1:1:1.
the inventor researches find that the mass ratio of the three components in the anti-rust pigment can have great influence on the anti-corrosion effect, and when the mass ratio of the three components is more preferably 1:1:1, the obtained water-based epoxy primer has optimal neutral salt fog resistance effect.
As a preferred embodiment of the water-based epoxy primer for rail transit of the present invention, the preparation method of the calcium ion-exchanged silica gel comprises the following steps: adding water glass with the silicon dioxide content of 20-25% and the modulus of 3.3 and sulfuric acid with the mass concentration of 30-50% into water with the temperature of 40-45 ℃ at the flow rate of 3:1 for 40-60 minutes, standing for 3-5 hours after the addition, washing and adding water to adjust the pH value to 10-12 after the reaction is finished; then adding a calcium ion exchanger to react for 12-16 hours, and after the reaction is finished, filtering, washing, drying and crushing to obtain calcium ion exchange silica gel; the calcium ion modifier is at least one of calcium nitrate, calcium sulfate and calcium hydrophosphate.
Preferably, the pH value is adjusted to 10-12 by adopting sodium hydroxide solution with the mass concentration of 5-10%; the washing after the refining reaction is finished is to wash with hot water at 50-80 ℃ until the conductivity is less than 5000 mu m/cm.
As a preferred embodiment of the water-based epoxy primer for rail transit of the present invention, the preparation method of the organosiloxane-modified silica gel comprises the following steps: adding water glass with the silicon dioxide content of 20-25% and the modulus of 3.3 and sulfuric acid with the mass concentration of 30-50% into water with the temperature of 40-45 ℃ at the flow rate of 3:1 for 40-60 minutes, standing for 3-5 hours after the addition, washing and adding water to adjust the pH value to 5-7 after the reaction is finished; then adding an organosiloxane coupling agent with epoxy groups for reaction for 6-8 hours, and after the reaction is finished, filtering, washing, drying and crushing to obtain organosiloxane modified silica gel; the organic siloxane coupling agent with epoxy groups is at least one of 3- (2, 3-epoxypropoxy) propyl trimethoxy silane and 2- (3, 4-epoxycyclohexane) ethyl trimethoxy silane.
Preferably, the pH value is adjusted to 5-7 by using a sulfuric acid solution with the mass concentration of 5-10%; the washing after the refining reaction is finished is to wash with hot water at 50-80 ℃ until the conductivity is less than 5000 mu m/cm.
The inventor researches and discovers that the excellent comprehensive effect can be achieved only when the calcium ion exchange silica gel and the organosiloxane modified silica gel obtained by the method are used together with the modified phosphate type antirust pigment.
As a preferable embodiment of the water-based epoxy primer for rail transit, the modified phosphate type rust-preventive pigment is any one of hydrated calcium aluminum polyphosphate, hydrated aluminum zinc orthophosphate and strontium zinc phosphosilicate.
As a preferable embodiment of the water-based epoxy primer for rail transit of the present invention, the cosolvent is an alcohol ether solvent; the leveling agent is polyether modified organic silicon; the thickener is polyurethane thickener; the defoaming agent is an organosilicon defoaming agent; the wetting agent is polyether modified siloxane; the dispersing agent is a nonionic dispersing agent; the pigment and filler is titanium white and talcum powder.
Preferably, the cosolvent is any one of propylene glycol methyl ether, ethylene glycol monobutyl ether and dipropylene glycol monobutyl ether; the leveling agent is any one of EFKA-3030, EFKA-3580 and Tego-4100; the thickener is any one of PUR 40, PUR 45 and RM-8W, RM-12W; the defoaming agent is any one of BYK-024, BYK-012, airex 902W and Airex 904W; the wetting agent is any one of BYK-346, BYK-348 and TEGO Wet 270; the dispersing agent is any one of BYK-190 and BYK-194N, BYK-2080; the titanium dioxide is R-215 or R-996; the talcum powder is 1250 mesh talcum powder or 1250 mesh talcum powder of Taixiang in Jiangyuan chemical industry.
As a preferred embodiment of the waterborne epoxy primer for rail transit, the waterborne epoxy emulsion is any one of Epikote 6520-WH-53A, epikote 6529-WH-53A, WBE-511 and WBE-521.
As a preferable embodiment of the water-based epoxy primer for rail transit, the water-based epoxy curing agent is a water-soluble modified amine adduct and is any one of Epikure 8290-Y-60, WBH-816 and WBH-817.
As a preferable implementation mode of the water-based epoxy primer for the rail transit, the anti-flash rust agent is a compound anti-flash rust agent and is any one of Halox-150, halox-350 and FA-179.
In addition, the invention also provides a preparation method of the water-based epoxy primer for rail transit, which comprises the following steps:
(1) Mixing antirust pigment, pigment filler, defoamer, wetting agent, dispersing agent and deionized water, grinding until the particle size is less than 25 mu m, adding the mixture into aqueous epoxy emulsion, uniformly mixing, adding cosolvent, flatting agent and thickener, uniformly mixing, filtering, and collecting filtrate to obtain a component A;
(2) Sequentially adding a water-based epoxy curing agent, an anti-flash rust agent and deionized water under the stirring state, uniformly mixing, filtering, and collecting filtrate to obtain a component B;
(3) The A component and the B component are mixed according to the mass ratio of (4-6): 1, uniformly mixing to obtain the waterborne epoxy primer for the rail transit.
As a preferred embodiment of the preparation method of the present invention, in the step (1), the mixing time in the grinding after mixing is 25-35min, and the stirring speed in the mixing process is 1400-1600r/min; adding cosolvent, leveling agent and thickener, mixing for 8-12min, and stirring at 600-1000r/min.
As a preferred embodiment of the preparation method of the present invention, in the step (2), the mixing time for uniform mixing is 12-18min, and the stirring speed in the mixing process is 600-1000r/min.
The beneficial effects of the invention are as follows:
the water-based epoxy primer for the rail transit provided by the invention is prepared by selecting proper mass parts of raw materials to form the component A and the component B, and adding two types of self-synthesized antirust pigments into the component A to be matched with another commercially available antirust pigment, and the obtained water-based epoxy primer has excellent salt spray resistance, acid resistance and alkali resistance and good adhesive force under the system of the water-based primer provided by the invention, can be effectively applied to the field of rail transit coatings, and has an effective protection effect on traffic rails; the preparation method of the water-based primer provided by the invention is simple and can be practically applied to actual production.
Detailed Description
For a better description of the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following specific examples.
The raw materials used in the examples and comparative examples of the present invention were obtained by the conventional purchasing route unless otherwise specified;
aqueous epoxy emulsion: WBE-511, dongguan Convergence, inc.;
aqueous epoxy curing agent: WBH-816, dongguan Convergence coating technology Co., ltd;
dispersing agent: BYK-190, pick chemistry;
defoaming agent: BYK-024, pick chemistry;
titanium white powder: r-215, china primary titanium white Co., ltd;
talc powder: 1250 mesh, tylosin;
modified phosphoric acid rust inhibitive pigment: SZP-391, halox, inc., USA;
cosolvent: propylene glycol methyl ether;
leveling agent: tego-4100, digao;
and (3) a thickening agent: PUR-45, ming Ling, germany;
wetting agent: BYK-348, pick chemistry;
anti-flash rust agent: halox 150, a company of Halox, usa.
Examples 1 to 5
Examples 1 to 5 respectively provide a waterborne epoxy primer for rail transit, the contents of the components are shown in table 1, and the numerical values in table 1 represent the mass parts of the corresponding components;
TABLE 1
The preparation methods of examples 1 to 5 are as follows:
(1) Preparation of calcium ion exchange silica gel: adding water glass with the silicon dioxide content of 25% and the modulus of 3.3 and sulfuric acid with the mass concentration of 45% into water with the temperature of 40-45 ℃ at the flow rate of 3:1 for 60 minutes, standing for reaction for 5 hours after the addition is finished, washing with hot water with the temperature of 80 ℃ until the conductivity is less than 5000 mu m/cm, adding water and adjusting the pH value to 11 with sodium hydroxide solution with the mass concentration of 8%; then adding calcium ion exchanger calcium nitrate to react for 16 hours, filtering, washing, drying and crushing after the reaction is finished to obtain calcium ion exchange silica gel;
(2) Preparation of organosiloxane modified silica gel: adding water glass with the silicon dioxide content of 25% and the modulus of 3.3 and sulfuric acid with the mass concentration of 45% into water with the temperature of 40-45 ℃ at the flow rate of 3:1 for 60 minutes, standing for reaction for 5 hours after the addition is finished, washing with hot water with the temperature of 80 ℃ until the conductivity is less than 5000 mu m/cm, adding water and adjusting the pH value to 6 with sulfuric acid solution with the mass concentration of 10%; then adding an organosiloxane coupling agent 3- (2, 3-epoxypropoxy) propyl trimethoxy silane with epoxy groups for reaction for 8 hours, and after the reaction is finished, filtering, washing, drying and crushing to obtain organosiloxane modified silica gel;
(3) Stirring and mixing the antirust pigment, pigment filler, defoamer, wetting agent, dispersing agent and deionized water for 30min at a stirring speed of 1500r/min, grinding to a particle size smaller than 25 mu m, adding into the aqueous epoxy emulsion, uniformly mixing at a stirring speed of 800r/min, adding the cosolvent, the flatting agent and the thickener, stirring for 10min to uniformly mix, filtering, and collecting filtrate to obtain a component A;
(4) Sequentially adding the water-based epoxy curing agent, the anti-flash rust agent and the deionized water at the stirring speed of 800r/min, stirring for 15min, uniformly mixing, filtering, and collecting filtrate to obtain a component B;
(5) The component A and the component B are mixed according to the mass ratio of 5:1, uniformly mixing to obtain the waterborne epoxy primer for the rail transit.
Example 6
This example provides a waterborne epoxy primer for rail transit which differs from example 1 only in that the calcium ion modifier used in the preparation of the calcium ion exchanged silica gel is calcium sulfate; the modifier used in the preparation of the organosiloxane modified silica gel was 2- (3, 4-epoxycyclohexane) ethyltrimethoxysilane.
Comparative examples 1 to 9
Comparative examples 1 to 9 respectively provide a waterborne epoxy primer for rail transit, the contents of the components of which are shown in Table 2, and the numerical values in Table 2 represent the parts by mass of the corresponding components;
TABLE 2
Comparative example 10
The only difference between the present comparative example and example 1 is in the preparation of the calcium ion-exchanged silica gel, and the preparation method of the calcium ion-exchanged silica gel in the present comparative example is: adding water glass with the silicon dioxide content of 10 percent and the modulus of 3.3 and sulfuric acid with the mass concentration of 60 percent into water with the temperature of 40-45 ℃ at the flow rate of 1:1 for 50 minutes, standing for 4 hours after the addition, washing with hot water with the temperature of 65 ℃ after the reaction is finished, washing to the conductivity of less than 5000 mu m/cm, adding water and adjusting the pH value to 8 by using sodium hydroxide solution with the mass concentration of 8 percent; then adding calcium ion exchanger calcium chloride to react for 14h, filtering, washing, drying and crushing after the reaction is finished, thus obtaining the calcium ion exchange silica gel.
Comparative example 11
The only difference between the water-based epoxy primer for rail transit and the embodiment 1 is that the preparation method of the organic siloxane modified silica gel in the comparative example is that: adding water glass with the silicon dioxide content of 20% and the modulus of 4.8 and sulfuric acid with the mass concentration of 40% into water with the temperature of 55-60 ℃ at the flow rate of 3:1 for 50 minutes, standing for 4 hours after the addition, washing with hot water with the temperature of 65 ℃ after the reaction is finished, washing until the conductivity is less than 5000 mu m/cm, adding water, and adjusting the pH value to 2 with sulfuric acid solution with the mass concentration of 8%; and then adding an organosiloxane coupling agent 3- (2, 3-glycidoxy) propyl triethoxysilane with epoxy groups for reaction for 7h, and after the reaction is finished, filtering, washing, drying and crushing to obtain the organosiloxane modified silica gel.
The preparation methods of comparative examples 1 to 11 are identical to the preparation method of example 1; the relevant components are not added correspondingly in the comparative examples.
Effect example
The performance of the water-based epoxy primers for rail transit prepared in examples 1 to 6 and comparative examples 1 to 11 is verified, the standard of performance test is shown in table 3, and the test result is shown in table 4;
TABLE 3 Table 3
| Test item | Test standard | Test item | Test standard | Test item | Test standard |
| Bending properties | GB/T6742 | Adhesive force (cross-cut method) | GB/T9286 | Alkali-proof 48h (5%) | GB/T9274 |
| Cup test | GB/T9753 | Adhesive force (Lakai method) | GB/T5210 | Water-proof 240h (40+ -2 ℃ C.) | GB/T9274 |
| Sagging resistance | GB/T9246 | Acid-proof 48h (5%) | GB/T9274 | Neutral salt fog resistant (aluminium plate) | GB/T1771 |
TABLE 4 Table 4
As can be seen from table 4, when the technical scheme of the invention is adopted, the obtained water-based epoxy primer for rail transit has excellent mechanical properties and sagging resistance, the adhesive force (a cross-cut method) is of level 1, the value of the adhesive force (a pull-open method) is above 7.97Mpa, no abnormality exists in acid resistance, alkali resistance and water resistance, and the time of neutral salt fog resistance is above 960 hours;
as can be seen from example 1 and comparative examples 1 to 6, any one or any two of the rust preventive pigments are reduced, the performance of the waterborne epoxy primer for rail transit is reduced, for example, when only one of the two rust preventive pigments prepared by the invention is added (comparative examples 1 and 2), the alkali resistance of the obtained product cannot pass, and the time of neutral salt fog resistance also shows a reduced trend compared with example 1, namely, only 800 hours is reduced by 33.33%; when only modified phosphate rust-proof pigment is added (comparative example 3), the acid resistance of the obtained product cannot pass, the time of neutral salt mist resistance is obviously reduced by 300 hours, and the reduction amplitude reaches 75%;
as can be seen from example 1 and comparative examples 7 to 8, when the mass ratio of the three components in the rust inhibitive pigment is changed, the neutral salt spray resistance of the product is lowered or the acid and alkali resistance thereof is lowered to some extent;
as can be seen from example 1 and comparative example 9, when the mass ratio of the rust inhibitive pigment to be added is kept constant at 1:1:1, but the added fraction thereof is increased, the properties of the obtained product also show a tendency to decrease;
as can be seen from example 1 and comparative examples 10 to 11, when the preparation methods of the calcium ion-exchanged silica gel and the organosiloxane-modified silica gel in the rust inhibitive pigment are out of the range given by the present invention, the types of the rust inhibitive pigment are equivalent to being changed, and the neutral salt spray resistance and the acid and alkali resistance of the obtained product all show a reduced tendency.
Finally, it should be noted that the above-mentioned embodiments illustrate rather than limit the scope of the invention, and that those skilled in the art will understand that changes can be made to the technical solutions of the invention or equivalents thereof without departing from the spirit and scope of the technical solutions of the invention.
Claims (10)
1. The water-based epoxy primer for the rail transit is characterized by comprising an A component and a B component, wherein the mass ratio of the A component to the B component is (4-6): 1, a step of;
the component A comprises the following components in parts by mass: 30-55 parts of aqueous epoxy emulsion, 1-5 parts of cosolvent, 3-15 parts of antirust pigment, 0.1-1 part of flatting agent, 0.1-1 part of thickener, 8-30 parts of pigment filler, 0.1-0.5 part of defoamer, 0.1-0.5 part of wetting agent, 0.5-1.5 part of dispersing agent and 8-30 parts of deionized water;
the component B comprises the following components in parts by mass: 50-70 parts of aqueous epoxy curing agent, 5-20 parts of anti-flash rust agent and 10-30 parts of deionized water;
the rust-proof pigment comprises calcium ion exchange silica gel, organic siloxane modified silica gel and modified phosphate rust-proof pigment; the mass ratio of the calcium ion exchange silica gel, the organic siloxane modified silica gel and the modified phosphate rust-proof pigment is that the calcium ion exchange silica gel: organosiloxane modified silica gel: modified phosphate type rust inhibitive pigment= (3-4): (1-3): (3-4);
the preparation method of the calcium ion exchange silica gel comprises the following steps: adding water glass with the silicon dioxide content of 20-25% and the modulus of 3.3 and sulfuric acid with the mass concentration of 30-50% into water with the temperature of 40-45 ℃ at the flow rate of 3:1 for 40-60 minutes, standing for 3-5 hours after the addition, washing and adding water to adjust the pH value to 10-12 after the reaction is finished; then adding a calcium ion exchanger to react for 12-16 hours, and after the reaction is finished, filtering, washing, drying and crushing to obtain calcium ion exchange silica gel;
the preparation method of the organosiloxane modified silica gel comprises the following steps: adding water glass with the silicon dioxide content of 20-25% and the modulus of 3.3 and sulfuric acid with the mass concentration of 30-50% into water with the temperature of 40-45 ℃ at the flow rate of 3:1 for 40-60 minutes, standing for 3-5 hours after the addition, washing and adding water to adjust the pH value to 5-7 after the reaction is finished; then adding an organosiloxane coupling agent with epoxy groups to react for 6-8h, and after the reaction is finished, filtering, washing, drying and crushing to obtain the organosiloxane modified silica gel.
2. The water-based epoxy primer for rail transit of claim 1, wherein the a component comprises the following components in parts by mass: 40-45 parts of aqueous epoxy emulsion, 3-4 parts of cosolvent, 9-12 parts of antirust pigment, 0.1-1 part of flatting agent, 0.1-1 part of thickener, 20-25 parts of pigment filler, 0.1-0.5 part of defoamer, 0.1-0.5 part of wetting agent, 0.5-1.5 part of dispersing agent and 8-20 parts of deionized water;
the component B comprises the following components in parts by mass: 60-65 parts of aqueous epoxy curing agent, 14-16 parts of anti-flash rust agent and 15-25 parts of deionized water.
3. The water-based epoxy primer for rail transit according to claim 2, wherein the mass ratio of the calcium ion-exchanged silica gel, the organosiloxane-modified silica gel and the modified phosphate-based rust inhibitive pigment is: organosiloxane modified silica gel: modified phosphate rust inhibitive pigment = 1:1:1.
4. the waterborne epoxy primer for rail transit of claim 3, wherein the primer comprises a primer coating,
the calcium ion exchanger is at least one of calcium nitrate, calcium sulfate and calcium hydrophosphate.
5. The waterborne epoxy primer for rail transit of claim 3, wherein the primer comprises a primer coating,
the organic siloxane coupling agent with epoxy groups is at least one of 3- (2, 3-epoxypropoxy) propyl trimethoxy silane and 2- (3, 4-epoxycyclohexane) ethyl trimethoxy silane.
6. The water-based epoxy primer for rail transit according to claim 3, wherein the modified phosphate-based rust inhibitive pigment is any one of hydrated calcium aluminum polyphosphate, hydrated aluminum zinc orthophosphate, and strontium zinc phosphosilicate.
7. The waterborne epoxy primer for rail transit according to claim 3, wherein the cosolvent is an alcohol ether solvent; the leveling agent is polyether modified organic silicon; the thickener is polyurethane thickener; the defoaming agent is an organosilicon defoaming agent; the wetting agent is polyether modified siloxane; the dispersing agent is a nonionic dispersing agent; the pigment and filler is titanium white and talcum powder.
8. The method for preparing the waterborne epoxy primer for rail transit according to any one of claims 1 to 7, wherein the preparation method comprises the following steps:
(1) Mixing antirust pigment, pigment filler, defoamer, wetting agent, dispersing agent and deionized water, grinding until the particle size is less than 25 mu m, adding the mixture into aqueous epoxy emulsion, uniformly mixing, adding cosolvent, flatting agent and thickener, uniformly mixing, filtering, and collecting filtrate to obtain a component A;
(2) Sequentially adding a water-based epoxy curing agent, an anti-flash rust agent and deionized water under the stirring state, uniformly mixing, filtering, and collecting filtrate to obtain a component B;
(3) The A component and the B component are mixed according to the mass ratio of (4-6): 1, uniformly mixing to obtain the waterborne epoxy primer for the rail transit.
9. The method according to claim 8, wherein in the step (1), the mixing time in the grinding after the mixing is 25 to 35min, and the stirring speed in the mixing is 1400 to 1600r/min; adding cosolvent, leveling agent and thickener, mixing for 8-12min, and stirring at 600-1000r/min.
10. The method according to claim 8, wherein in the step (2), the mixing time for uniform mixing is 12 to 18min, and the stirring speed during mixing is 600 to 1000r/min.
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| JPH0912931A (en) * | 1995-07-04 | 1997-01-14 | Teika Corp | Coating composition for precoated steel sheet |
| JP2004209787A (en) * | 2002-12-27 | 2004-07-29 | Jfe Steel Kk | Pre-coated steel sheet with excellent environmental harmony, sliding part coating peel resistance and corrosion resistance |
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| JPH0912931A (en) * | 1995-07-04 | 1997-01-14 | Teika Corp | Coating composition for precoated steel sheet |
| JP2004209787A (en) * | 2002-12-27 | 2004-07-29 | Jfe Steel Kk | Pre-coated steel sheet with excellent environmental harmony, sliding part coating peel resistance and corrosion resistance |
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