CN116004084A - Water-based epoxy primer and preparation method and application thereof - Google Patents
Water-based epoxy primer and preparation method and application thereof Download PDFInfo
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- CN116004084A CN116004084A CN202310007841.4A CN202310007841A CN116004084A CN 116004084 A CN116004084 A CN 116004084A CN 202310007841 A CN202310007841 A CN 202310007841A CN 116004084 A CN116004084 A CN 116004084A
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- agent
- water
- pigment
- epoxy primer
- filler
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- 239000004593 Epoxy Substances 0.000 title claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 68
- 239000000049 pigment Substances 0.000 claims abstract description 62
- 239000000080 wetting agent Substances 0.000 claims abstract description 47
- 239000003973 paint Substances 0.000 claims abstract description 45
- 239000000945 filler Substances 0.000 claims abstract description 42
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000002562 thickening agent Substances 0.000 claims abstract description 31
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 28
- 239000000839 emulsion Substances 0.000 claims abstract description 27
- 239000002270 dispersing agent Substances 0.000 claims abstract description 23
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 22
- 239000006184 cosolvent Substances 0.000 claims abstract description 16
- 239000003112 inhibitor Substances 0.000 claims abstract description 16
- 239000000440 bentonite Substances 0.000 claims abstract description 15
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 15
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000004952 Polyamide Substances 0.000 claims abstract description 13
- 229920002647 polyamide Polymers 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims description 29
- 239000013530 defoamer Substances 0.000 claims description 24
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000011259 mixed solution Substances 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 13
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 239000010445 mica Substances 0.000 claims description 6
- 229910052618 mica group Inorganic materials 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000002480 mineral oil Substances 0.000 claims description 4
- 235000010446 mineral oil Nutrition 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- MHLMPARDYWGGLE-UHFFFAOYSA-K aluminum;zinc;phosphate Chemical compound [Al+3].[Zn+2].[O-]P([O-])([O-])=O MHLMPARDYWGGLE-UHFFFAOYSA-K 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000001506 calcium phosphate Substances 0.000 claims description 3
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 3
- 235000011010 calcium phosphates Nutrition 0.000 claims description 3
- 239000010433 feldspar Substances 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000036961 partial effect Effects 0.000 claims description 3
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 3
- 229910052712 strontium Inorganic materials 0.000 claims description 3
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 3
- 235000010215 titanium dioxide Nutrition 0.000 claims description 3
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 3
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 3
- 239000010456 wollastonite Substances 0.000 claims description 3
- 229910052882 wollastonite Inorganic materials 0.000 claims description 3
- 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 claims description 3
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000011253 protective coating Substances 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 15
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 7
- 239000003822 epoxy resin Substances 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- 239000000758 substrate Substances 0.000 description 4
- 238000000227 grinding Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- LXOFYPKXCSULTL-UHFFFAOYSA-N 2,4,7,9-tetramethyldec-5-yne-4,7-diol Chemical compound CC(C)CC(C)(O)C#CC(C)(O)CC(C)C LXOFYPKXCSULTL-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 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
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RWNUSVWFHDHRCJ-UHFFFAOYSA-N 1-butoxypropan-2-ol Chemical compound CCCCOCC(C)O RWNUSVWFHDHRCJ-UHFFFAOYSA-N 0.000 description 1
- IBLKWZIFZMJLFL-UHFFFAOYSA-N 1-phenoxypropan-2-ol Chemical compound CC(O)COC1=CC=CC=C1 IBLKWZIFZMJLFL-UHFFFAOYSA-N 0.000 description 1
- CUDYYMUUJHLCGZ-UHFFFAOYSA-N 2-(2-methoxypropoxy)propan-1-ol Chemical compound COC(C)COC(C)CO CUDYYMUUJHLCGZ-UHFFFAOYSA-N 0.000 description 1
- XYVAYAJYLWYJJN-UHFFFAOYSA-N 2-(2-propoxypropoxy)propan-1-ol Chemical compound CCCOC(C)COC(C)CO XYVAYAJYLWYJJN-UHFFFAOYSA-N 0.000 description 1
- 229920003319 Araldite® Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- BHXIWUJLHYHGSJ-UHFFFAOYSA-N ethyl 3-ethoxypropanoate Chemical compound CCOCCC(=O)OCC BHXIWUJLHYHGSJ-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229940094522 laponite Drugs 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- XCOBTUNSZUJCDH-UHFFFAOYSA-B lithium magnesium sodium silicate Chemical compound [Li+].[Li+].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Na+].[Na+].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3 XCOBTUNSZUJCDH-UHFFFAOYSA-B 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention belongs to the technical field of protective coating, and particularly relates to a water-based epoxy primer and a preparation method and application thereof. The invention provides a water-based epoxy primer, which comprises a paint and a curing agent which are independently packaged, wherein the paint comprises the following components in percentage by mass: 30-40% of aqueous epoxy emulsion; 1.0 to 2.0 percent of defoaming agent; 5-15% of aqueous polyurethane resin; 0.5 to 1.0 percent of base material wetting agent; 0.5 to 1.5 percent of thickening agent; 2-4% of cosolvent; 0.5 to 2.0 percent of flash rust inhibitor; 1-3% of dispersing agent; 30-40% of pigment and filler; 1-5% of rust-proof pigment; pigment and filler wetting agent 0.2-0.5%; 0.5 to 2.0 percent of water-based organic bentonite; 4-10% of water; the curing agent comprises the following components in percentage by mass: 30-40% of a water-based polyamide curing agent; 60-70% of a dissolving agent. The water-based epoxy primer provided by the invention has excellent wear resistance.
Description
Technical Field
The invention belongs to the technical field of protective coating, and particularly relates to a water-based epoxy primer and a preparation method and application thereof.
Background
The epoxy primer consists of additives such as epoxy resin, pigment and the like and a curing agent, is widely applied to the surfaces of various indoor and outdoor metal and cement structures, and can be coated on equipment such as railway bridges, high-voltage transmission towers, containers, offshore drilling and oil extraction equipment and the like used in different environments.
The container is a special tool for international logistics transportation, and the use environment is complex and changeable, and the container is also subjected to friction and collision in transportation and loading and unloading operations due to long-time seawater contact, so that the epoxy primer is required to have good corrosion resistance and wear resistance;
chinese patent publication No. CN107177277a discloses an epoxy primer for containers, which has good corrosion resistance but still has the defect of poor wear resistance.
Disclosure of Invention
The invention aims to provide a water-based epoxy primer, a preparation method and application thereof, and the water-based epoxy primer provided by the invention has an anti-corrosion property and an excellent wear resistance.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a water-based epoxy primer, which comprises a paint vehicle and a curing agent which are independently packaged,
the paint comprises the following components in percentage by mass: 30-40% of aqueous epoxy emulsion; 1.0 to 2.0 percent of defoaming agent; 5-15% of aqueous polyurethane resin; 0.5 to 1.0 percent of base material wetting agent; 0.5 to 1.5 percent of thickening agent; 2-4% of cosolvent; 0.5 to 2.0 percent of flash rust inhibitor; 1-3% of dispersing agent; 30-40% of pigment and filler; 1-5% of rust-proof pigment; pigment and filler wetting agent 0.2-0.5%; 0.5 to 2.0 percent of water-based organic bentonite; 4-10% of water;
the curing agent comprises the following components in percentage by mass: 30-40% of aqueous polyamide oxygen curing agent; 60-70% of a dissolving agent.
Preferably, the mass ratio of the paint to the curing agent is 10-12: 1.
preferably, the defoamer comprises a silicone defoamer and/or a mineral oil defoamer.
Preferably, the pigment and filler comprises one or more of titanium dioxide, iron oxide red, iron oxide yellow, precipitated barium sulfate, talcum powder, wollastonite powder, mica powder, calcium carbonate, mica iron oxide and feldspar powder.
Preferably, the rust inhibitive pigment comprises one or more of zinc phosphate, aluminum tripolyphosphate, aluminum zinc phosphate, calcium borosilicate, calcium phosphosilicate, strontium phosphomolybdate and calcium phosphate.
Preferably, the thickener comprises an aqueous polyurethane thickener.
The invention also provides a preparation method of the water-based epoxy primer, which comprises the following steps:
firstly mixing aqueous epoxy emulsion, a defoaming agent, aqueous polyurethane resin, a base material wetting agent, a thickening agent, a cosolvent, an anti-flash rust agent, a dispersing agent, pigment filler, anti-rust pigment, pigment filler wetting agent, aqueous organic bentonite and water to obtain a paint;
secondly mixing the aqueous polyamide oxygen curing agent with a dissolving agent to obtain a curing agent;
when the waterborne epoxy primer is used, the paint and the curing agent are mixed for the third time, and the waterborne epoxy primer is obtained.
Preferably, the first mixing comprises:
primary mixing of aqueous epoxy emulsion, a part of defoamer, aqueous polyurethane resin, a base material wetting agent, a thickener, a cosolvent, an anti-flash rust agent and a part of water to obtain primary mixed solution;
secondary mixing of dispersing agent, pigment and filler, antirust pigment, pigment and filler wetting agent, water-based organic bentonite, residual defoaming agent and residual water to obtain secondary mixed solution;
and mixing the primary mixed solution and the secondary mixed solution in three stages.
Preferably, the mass ratio of the partial defoaming agent to the residual defoaming agent is 1:1, a step of;
the mass ratio of the part of water to the rest of water is 1:1.
the invention also provides the application of the water-based epoxy primer prepared by the technical scheme or the preparation method of the water-based epoxy primer as container coating.
The invention provides a water-based epoxy primer, which comprises a paint and a curing agent which are independently packaged, wherein the paint comprises the following components in percentage by mass: 30-40% of aqueous epoxy emulsion; 1.0 to 2.0 percent of defoaming agent; 5-15% of aqueous polyurethane resin; 0.5 to 1.0 percent of base material wetting agent; 0.5 to 1.5 percent of thickening agent; 2-4% of cosolvent; 0.5 to 2.0 percent of flash rust inhibitor; 1-3% of dispersing agent; 30-40% of pigment and filler; 1-5% of rust-proof pigment; pigment and filler wetting agent 0.2-0.5%; 0.5 to 2.0 percent of water-based organic bentonite; 4-10% of water; the curing agent comprises the following components in percentage by mass: 30-40% of a water-based polyamide curing agent; 60-70% of a dissolving agent. In the film forming process, the compatibility of the aqueous epoxy resin and the aqueous polyurethane resin is inconsistent, so that the aqueous polyurethane resin is easier to migrate to the surface and cannot be coated by the aqueous epoxy resin and the aqueous polyamide curing agent; meanwhile, the affinity of the aqueous epoxy resin and the pigment filler is higher, and the pigment filler is coated by the aqueous epoxy resin, so that the pigment filler does not excessively consume the aqueous polyurethane resin, and the elasticity and low surface energy of the aqueous polyurethane resin can be utilized to improve the wear resistance; furthermore, the surface water-based polyurethane resin has better shielding property, and can further improve the anti-corrosion properties such as salt spray resistance, damp heat resistance and the like.
Detailed Description
The invention provides a water-based epoxy primer, which comprises a paint vehicle and a curing agent which are independently packaged,
the paint comprises the following components in percentage by mass: 30-40% of aqueous epoxy emulsion; 1.0 to 2.0 percent of defoaming agent; 5-15% of aqueous polyurethane resin; 0.5 to 1.0 percent of base material wetting agent; 0.5 to 1.5 percent of thickening agent; 2-4% of cosolvent; 0.5 to 2.0 percent of flash rust inhibitor; 1-3% of dispersing agent; 30-40% of pigment and filler; 1-5% of rust-proof pigment; pigment and filler wetting agent 0.2-0.5%; 0.5 to 2.0 percent of water-based organic bentonite; 4-10% of water;
the curing agent comprises the following components in percentage by mass: 30-40% of a water-based polyamide curing agent; 60-70% of a dissolving agent.
In the present invention, all components are commercially available products well known to those skilled in the art unless specified otherwise.
The water-based epoxy primer provided by the invention comprises a paint and a curing agent which are independently packaged. According to the invention, the paint and the curing agent are independently packaged, so that the epoxy primer can be prevented from being crosslinked and cured during storage.
In the invention, the mass ratio of the paint to the curing agent is preferably 10-12: 1, further preferably 11:1.
the paint provided by the invention comprises 30-40% of aqueous epoxy emulsion, more preferably 32-38%, and even more preferably 33-35% by mass. In the present invention, the aqueous epoxy emulsion preferably comprises one or more of EP2384W-57WA epoxy emulsion, EP384W-53WAMP epoxy emulsion, epikote-6520-WH-53A epoxy emulsion, MAINCOTE WEP-10 epoxy emulsion, MAINCOTE AEH-20 epoxy emulsion, araldite PZ3961 epoxy emulsion, EPICLONEM-8420 epoxy emulsion, AB-EP-20 epoxy emulsion and NPEW-258W60 epoxy emulsion. In the present invention, the pH of the aqueous epoxy emulsion is preferably 6.5 to 7. In the invention, the aqueous epoxy emulsion can be used as a main film forming substance of a paint film and can play a good role in corrosion resistance.
The paint provided by the invention comprises 1.0-2.0% of defoamer, more preferably 1.2-1.8%, and even more preferably 1.3-1.5% by mass. In the present invention, the antifoaming agent preferably includes a silicone antifoaming agent and/or a mineral oil antifoaming agent. In the present invention, the silicone defoamer preferably comprises one or more of a dihigh TEGO 901W defoamer, a dihigh TEGO 902W defoamer, a dihigh TEGO 904W defoamer, a dihigh TEGO Airex 910 defoamer, and a TEGO Airex 920 defoamer; the mineral oil defoamer preferably comprises one or more of BASF a10 defoamer, di-high TEGO Foamex12 defoamer, di-high TEGO Foamex20 defoamer, di-high TEGO Foamex22 defoamer, and di-high TEGO Foamex24 defoamer.
The paint provided by the invention comprises 5-15% of aqueous polyurethane resin, more preferably 8-13%, and even more preferably 10-11% by mass. In the present invention, the aqueous polyurethane resin preferably includes Zhan Xin
TW 6466/36WA aqueous polyurethane resin and Zhan Xin->
TW7000W 40WA aqueous polyurethane resin, < >>
TW 6460/35WA aqueous polyurethane resin and NeoRez TM R-961 aqueous polyurethane resin and NeoRez TM R-968 aqueous polyurethane resin and NeoRez TM R-2005 waterborne polyurethane resin and NeoRez TM One or more of R-2180 aqueous polyurethane resin. In the invention, the water-based polyurethane resin can improve the hardness and elasticity of a paint film, thereby improving the wear resistance.
The paint provided by the invention comprises 0.5-1.0% of base material wetting agent, more preferably 0.6-0.9%, and still more preferably 0.7-0.8% by mass. In the present invention, the substrate wetting agent preferably includes one or more of a Pick BYK-346 wetting agent, a Dow Corning DC57 wetting agent, a Dow Corning DC60 wetting agent, a Di high TEGO 245 wetting agent, a Di high TEGO 4100 wetting agent, and a Di high TEGO 4000 wetting agent. In the invention, the substrate wetting agent can effectively reduce the surface tension of water after film formation, has better wetting ability on a substrate, and is beneficial to increasing the adhesive force of a paint film.
The paint provided by the invention comprises 0.5 to 1.5 percent of thickener, more preferably 0.6 to 1.3 percent of thickener, and even more preferably 0.8 to 1.0 percent of thickener. In the present invention, the thickener preferably includes an aqueous polyurethane thickener; the aqueous polyurethane thickener preferably comprises one or more of a Haimand RHEOLATE 299 thickener, a Haimand RHEOLATE FX 1010 thickener, a Haimand DeuRheo WT-105A thickener, a Haimand DeuRheo WT-102 thickener, a Dow RM-8W thickener and a Dow RM-12W thickener. In the invention, the thickener can ensure the storage stability of the paint, does not generate precipitation, and can ensure the sagging resistance during dilution spraying.
The paint provided by the invention comprises 2-4% of cosolvent, more preferably 2.5-3.5%, and even more preferably 3%. In the present invention, the cosolvent preferably includes one or more of propylene glycol butyl ether, dipropylene glycol methyl ether, dipropylene glycol propyl ether, propylene glycol phenyl ether, ethyl 3-ethoxypropionate, and alcohol ester-12. In the invention, the cosolvent can enable the resin to be developed from the emulsion coating during film forming, increase the compatibility with the curing agent, promote curing, and simultaneously can adjust the surface drying rate and adjust the defoaming property in cooperation with the defoaming agent.
The paint provided by the invention comprises 0.5-2.0% of flash rust inhibitor, more preferably 0.8-1.8%, and even more preferably 1.0-1.5%. In the invention, the flash rust inhibitor preferably comprises one or more of Hamming FA179 flash rust inhibitor, raybo 60 flash rust inhibitor, FR-5100 flash rust inhibitor, FR-355 flash rust inhibitor, halox 515 flash rust inhibitor, halox 650 flash rust inhibitor, HPM HP-150 flash rust inhibitor, HPM HP-600 flash rust inhibitor and HPM CP-1000 flash rust inhibitor. In the invention, the anti-flash rust agent can effectively inhibit initial flash corrosion and ensure the corrosion resistance of a paint film.
The paint provided by the invention comprises 1 to 3% of dispersing agent, more preferably 1.5 to 2.5%, and still more preferably 2% by mass percent. In the present invention, the dispersant preferably includes one or more of a di-high TEGO 755W dispersant, a di-high TEGO 740W dispersant, a Pick BYK-190 dispersant, a Pick BYK-180 dispersant, a Dow very good powder 1620 dispersant, a Dow very good powder 1618 dispersant, and a Dow very good powder 1124 dispersant. In the invention, the dispersing agent can moisten pigment and filler, so that the pigment shows good tinting strength, the pigment and filler can be well dissolved in water, the slurry forms uniform fluid, and the slurry is well stored and does not precipitate.
The paint provided by the invention comprises 30-40% of pigment and filler, more preferably 32-38%, and still more preferably 33-35% of pigment and filler by mass percent. In the present invention, the pigment and filler preferably includes one or more of titanium white, iron oxide red, iron oxide yellow, precipitated barium sulfate, talc, wollastonite powder, mica powder, calcium carbonate, mica iron oxide and feldspar powder.
The paint provided by the invention comprises 1 to 5% of rust-proof pigment, more preferably 2 to 4%, and still more preferably 3% by mass. In the present invention, the rust inhibitive pigment preferably includes one or more of zinc phosphate, aluminum tripolyphosphate, aluminum zinc phosphate, calcium borosilicate, calcium phosphosilicate, strontium phosphomolybdate, and calcium phosphate. In the invention, the rust-proof pigment can effectively inhibit salt spray corrosion and prevent rust.
The paint provided by the invention comprises 0.2-0.5% of pigment and filler wetting agent, and more preferably 0.3-0.4% of pigment and filler wetting agent. In the present invention, the pigment and filler wetting agent preferably comprises one or more of Surfynol 104BC wetting agent, surfynol 104E wetting agent, TEGO Twin 4000 wetting agent, TEGO Twin 4100 wetting agent, TEGO Wet 240 wetting agent, TEGO Wet 250 wetting agent, TEGO Wet 270 wetting agent, and TEGO Wet 500 wetting agent produced by gas chemical industry in the united states. In the invention, the pigment and filler wetting agent can uniformly disperse pigment and filler in water, does not generate shrinkage cavity, and has good adhesive force on a substrate with very low surface energy and polluted.
The paint provided by the invention comprises 0.5-2.0% of aqueous organic bentonite, more preferably 0.8-1.8%, and even more preferably 1.0-1.5% by mass. In the present invention, the aqueous organobentonite preferably includes one or more of Pick Laponite RD organobentonite, hamming hummer LT organobentonite and Hamming hummer LB organobentonite. In the invention, the aqueous organic bentonite can enable pigment and filler to be well suspended in resin and water, and sedimentation is not easy to occur; meanwhile, the function of the aqueous polyurethane thickener can be increased, the viscosity and shrinkage internal stress of the system are improved, the aqueous polyurethane is prevented from gelling, and the wear resistance of a paint film is further improved.
The paint provided by the invention comprises 4-10% of water, more preferably 5-9%, and still more preferably 6-8% by mass.
The curing agent provided by the invention comprises 30-40% of the aqueous polyamide curing agent, more preferably 32-38%, and even more preferably 33-35% by mass. In the present invention, the aqueous polyamide curing agent preferably comprises a Hansen Epikure-8538-Y-68 curing agent, zhan Xinbeikoox TM One or more of EH 613W/80W curing agent, henschel Aradur-3951 curing agent, CTW-6061 curing agent, CTW-6062 curing agent and LUCKAMIDE WN-720Z curing agent.
The curing agent provided by the invention comprises 60-70% of a dissolving agent, more preferably 62-68%, and even more preferably 63-65% by mass. In the present invention, the dissolving agent preferably includes water.
In the present invention, the pH of the aqueous epoxy primer is preferably 6.5 to 7.5. In the present invention, the viscosity of the aqueous epoxy primer is preferably 90 to 100KU.
The invention also provides a preparation method of the water-based epoxy primer, which comprises the following steps:
firstly mixing aqueous epoxy emulsion, a defoaming agent, aqueous polyurethane resin, a base material wetting agent, a thickening agent, a cosolvent, an anti-flash rust agent, a dispersing agent, pigment filler, anti-rust pigment, pigment filler wetting agent, aqueous organic bentonite and water to obtain a paint;
secondly mixing the aqueous polyamide curing agent and the dissolving agent to obtain a curing agent;
when the waterborne epoxy primer is used, the paint and the curing agent are mixed for the third time, and the waterborne epoxy primer is obtained.
The invention mixes aqueous epoxy emulsion, defoamer, aqueous polyurethane resin, base material wetting agent, thickener, cosolvent, anti-flash rust agent, dispersant, pigment filler, antirust pigment, pigment filler wetting agent, aqueous organic bentonite and water for the first time to obtain paint.
In the present invention, the first mixing preferably includes:
primary mixing of aqueous epoxy emulsion, a part of defoamer, aqueous polyurethane resin, a base material wetting agent, a thickener, a cosolvent, an anti-flash rust agent and a part of water to obtain primary mixed solution;
secondary mixing of dispersing agent, pigment and filler, antirust pigment, pigment and filler wetting agent, water-based organic bentonite, residual defoaming agent and residual water to obtain secondary mixed solution;
and mixing the primary mixed solution and the secondary mixed solution in three stages.
In the present invention, the mass ratio of the partial antifoaming agent to the residual antifoaming agent is preferably 1:1, a step of; the mass ratio of the part of water to the rest of water is preferably 1:1.
in the present invention, the primary mixing means is preferably stirring; the stirring speed is preferably 300-500 r/min, and the stirring time is preferably 20-30 min.
In the present invention, the secondary mixing means is preferably grinding; the rotation speed of the grinding is preferably 300-500 r/min, and the time is preferably 30-60 min.
In the present invention, the primary mixing and the secondary mixing are not limited in time sequence.
In the present invention, the three-stage mixing is preferably performed by stirring; the stirring speed is preferably 300-500 r/min, and the stirring time is preferably 20-30 min.
The invention mixes the aqueous polyamide curing agent and the dissolvent for the second time to obtain the curing agent.
In the present invention, the second mixing means is preferably stirring; the stirring speed is preferably 300-500 r/min, and the stirring time is preferably 20-30 min.
After the paint and the curing agent are obtained, the paint and the curing agent are mixed for the third time in use, so that the water-based epoxy primer is obtained.
In the present invention, the third mixing means is preferably stirring; the stirring speed is preferably 100-300 r/min, and the stirring time is preferably 3-5 min.
The invention also provides the application of the water-based epoxy primer prepared by the technical scheme or the preparation method of the water-based epoxy primer as container coating. The specific embodiments of the application of the present invention are not particularly limited, and may be carried out in a manner well known to those skilled in the art.
In order to further illustrate the present invention, the following examples are provided to describe in detail a waterborne epoxy primer and a preparation method and application thereof, but they should not be construed as limiting the scope of the present invention.
Examples 1 to 3
Referring to the ratios of table 1;
mixing the aqueous epoxy emulsion, a part of defoamer, aqueous polyurethane resin, a base material wetting agent, a thickener, a cosolvent, an anti-flash rust agent and a part of water, and stirring at a rotating speed of 300r/min for 20min to obtain a first-stage mixed solution;
secondary mixing of dispersing agent, pigment and filler, antirust pigment, pigment and filler wetting agent, water-based organic bentonite, residual defoaming agent and residual water, grinding for 40min at the rotating speed of 500r/min to obtain secondary mixed solution; mixing the obtained primary mixed solution and the secondary mixed solution, and stirring for 30min at the rotating speed of 300r/min to obtain a paint;
mixing the aqueous polyamide curing agent with water, and stirring for 20min at the rotating speed of 300r/min to obtain a curing agent;
when in use, the paint and the curing agent are mixed and stirred for 5min at the rotating speed of 200r/min to obtain the water-based epoxy primer;
TABLE 1 raw material amounts of waterborne epoxy primers obtained in examples 1 to 3
Performance test the waterborne epoxy primers obtained in examples 1 to 3 were subjected to a performance test, and the test results are shown in table 2;
table 2 results of Performance test of waterborne epoxy primers obtained in examples 1 to 3
As can be seen from Table 2, the waterborne epoxy primer provided by the invention has good wear resistance and corrosion resistance.
Although the foregoing embodiments have been described in some, but not all embodiments of the invention, other embodiments may be obtained according to the present embodiments without departing from the scope of the invention.
Claims (10)
1. A water-based epoxy primer comprises a paint and a curing agent which are independently packaged, and is characterized in that,
the paint comprises the following components in percentage by mass: 30-40% of aqueous epoxy emulsion; 1.0 to 2.0 percent of defoaming agent; 5-15% of aqueous polyurethane resin; 0.5 to 1.0 percent of base material wetting agent; 0.5 to 1.5 percent of thickening agent; 2-4% of cosolvent; 0.5 to 2.0 percent of flash rust inhibitor; 1-3% of dispersing agent; 30-40% of pigment and filler; 1-5% of rust-proof pigment; pigment and filler wetting agent 0.2-0.5%; 0.5 to 2.0 percent of water-based organic bentonite; 4-10% of water;
the curing agent comprises the following components in percentage by mass: 30-40% of a water-based polyamide curing agent; 60-70% of a dissolving agent.
2. The water-based epoxy primer according to claim 1, wherein the mass ratio of the paint to the curing agent is 10-12: 1.
3. the waterborne epoxy primer of claim 1, wherein the defoamer comprises a silicone defoamer and/or a mineral oil defoamer.
4. The water-based epoxy primer according to claim 1, wherein the pigment and filler comprises one or more of titanium white powder, iron oxide red, iron oxide yellow, precipitated barium sulfate, talc, wollastonite powder, mica powder, calcium carbonate, mica iron oxide, and feldspar powder.
5. The waterborne epoxy primer of claim 1, wherein the rust inhibitive pigment comprises one or more of zinc phosphate, aluminum tripolyphosphate, aluminum zinc phosphate, calcium borosilicate, calcium phosphosilicate, strontium phosphomolybdate, and calcium phosphate.
6. The waterborne epoxy primer of claim 1, wherein the thickener comprises a waterborne polyurethane thickener.
7. The method for preparing the waterborne epoxy primer according to any one of claims 1 to 6, comprising the following steps:
firstly mixing aqueous epoxy emulsion, a defoaming agent, aqueous polyurethane resin, a base material wetting agent, a thickening agent, a cosolvent, an anti-flash rust agent, a dispersing agent, pigment filler, anti-rust pigment, pigment filler wetting agent, aqueous organic bentonite and water to obtain a paint;
secondly mixing the aqueous polyamide curing agent and the dissolving agent to obtain a curing agent;
when the waterborne epoxy primer is used, the paint and the curing agent are mixed for the third time, and the waterborne epoxy primer is obtained.
8. The method of preparing according to claim 7, wherein the first mixing comprises:
primary mixing of aqueous epoxy emulsion, a part of defoamer, aqueous polyurethane resin, a base material wetting agent, a thickener, a cosolvent, an anti-flash rust agent and a part of water to obtain primary mixed solution;
secondary mixing of dispersing agent, pigment and filler, antirust pigment, pigment and filler wetting agent, water-based organic bentonite, residual defoaming agent and residual water to obtain secondary mixed solution;
and mixing the primary mixed solution and the secondary mixed solution in three stages.
9. The preparation method according to claim 8, wherein the mass ratio of the partial antifoaming agent to the residual antifoaming agent is 1:1, a step of;
the mass ratio of the part of water to the rest of water is 1:1.
10. use of the waterborne epoxy primer according to any one of claims 1 to 6 or the waterborne epoxy primer prepared by the preparation method according to any one of claims 7 to 9 as a container coating.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109385178A (en) * | 2018-09-19 | 2019-02-26 | 惠州市惠阳区嘉泰涂料有限公司 | A kind of abrasion-resistance water epoxy coating of normal temperature cure |
| CN110540790A (en) * | 2019-09-09 | 2019-12-06 | 江苏德威涂料有限公司 | water-based epoxy anticorrosive primer for container |
| CN112300656A (en) * | 2019-11-15 | 2021-02-02 | 上海溧文信息科技有限公司 | Environment-friendly two-component epoxy coating and preparation method thereof |
| CN113512335A (en) * | 2021-04-26 | 2021-10-19 | 滁州金桥德克新材料有限公司无锡分公司 | Water-based paint composition for cold chain container |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109385178A (en) * | 2018-09-19 | 2019-02-26 | 惠州市惠阳区嘉泰涂料有限公司 | A kind of abrasion-resistance water epoxy coating of normal temperature cure |
| CN110540790A (en) * | 2019-09-09 | 2019-12-06 | 江苏德威涂料有限公司 | water-based epoxy anticorrosive primer for container |
| CN112300656A (en) * | 2019-11-15 | 2021-02-02 | 上海溧文信息科技有限公司 | Environment-friendly two-component epoxy coating and preparation method thereof |
| CN113512335A (en) * | 2021-04-26 | 2021-10-19 | 滁州金桥德克新材料有限公司无锡分公司 | Water-based paint composition for cold chain container |
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