CN114958125A - Water-based high-filling hot-air-drying white primer for MDF (medium density fiberboard) board - Google Patents
Water-based high-filling hot-air-drying white primer for MDF (medium density fiberboard) board Download PDFInfo
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- CN114958125A CN114958125A CN202210635301.6A CN202210635301A CN114958125A CN 114958125 A CN114958125 A CN 114958125A CN 202210635301 A CN202210635301 A CN 202210635301A CN 114958125 A CN114958125 A CN 114958125A
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- Prior art keywords
- water
- white primer
- acrylic emulsion
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 238000011049 filling Methods 0.000 title claims abstract description 33
- 238000007602 hot air drying Methods 0.000 title abstract description 14
- 239000011094 fiberboard Substances 0.000 title description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000000839 emulsion Substances 0.000 claims abstract description 44
- 239000003973 paint Substances 0.000 claims abstract description 40
- 239000002270 dispersing agent Substances 0.000 claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 29
- 239000008367 deionised water Substances 0.000 claims abstract description 22
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 22
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims abstract description 21
- 238000004880 explosion Methods 0.000 claims abstract description 20
- 238000002360 preparation method Methods 0.000 claims abstract description 20
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000006254 rheological additive Substances 0.000 claims abstract description 18
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 18
- 239000006184 cosolvent Substances 0.000 claims abstract description 17
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 14
- 239000006260 foam Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000000080 wetting agent Substances 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims description 33
- 238000009736 wetting Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 238000004132 cross linking Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 8
- 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 7
- 239000011521 glass Substances 0.000 claims description 7
- 239000011268 mixed slurry Substances 0.000 claims description 7
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 6
- 229920000570 polyether Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- 229920000058 polyacrylate Polymers 0.000 claims description 4
- 229910017625 MgSiO Inorganic materials 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 239000011258 core-shell material Substances 0.000 claims description 3
- 239000004922 lacquer Substances 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 2
- CUDYYMUUJHLCGZ-UHFFFAOYSA-N 2-(2-methoxypropoxy)propan-1-ol Chemical compound COC(C)COC(C)CO CUDYYMUUJHLCGZ-UHFFFAOYSA-N 0.000 claims description 2
- 229920002396 Polyurea Polymers 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 2
- -1 polydimethylsiloxane Polymers 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000007790 scraping Methods 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 31
- 239000011248 coating agent Substances 0.000 abstract description 30
- 238000001035 drying Methods 0.000 abstract description 21
- 238000010276 construction Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 description 16
- 239000002023 wood Substances 0.000 description 9
- 239000013530 defoamer Substances 0.000 description 8
- 238000001514 detection method Methods 0.000 description 8
- 239000004088 foaming agent Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 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 4
- 239000003921 oil Substances 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000002860 competitive effect Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000007590 electrostatic spraying Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 2
- ZDQNWDNMNKSMHI-UHFFFAOYSA-N 1-[2-(2-prop-2-enoyloxypropoxy)propoxy]propan-2-yl prop-2-enoate Chemical compound C=CC(=O)OC(C)COC(C)COCC(C)OC(=O)C=C ZDQNWDNMNKSMHI-UHFFFAOYSA-N 0.000 description 1
- WDQMWEYDKDCEHT-UHFFFAOYSA-N 2-ethylhexyl 2-methylprop-2-enoate Chemical compound CCCCC(CC)COC(=O)C(C)=C WDQMWEYDKDCEHT-UHFFFAOYSA-N 0.000 description 1
- CFVWNXQPGQOHRJ-UHFFFAOYSA-N 2-methylpropyl prop-2-enoate Chemical compound CC(C)COC(=O)C=C CFVWNXQPGQOHRJ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000755729 Clivia Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical group CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000010556 emulsion polymerization method Methods 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 1
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
- 239000002025 wood fiber Substances 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- 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
- 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
- C09D7/65—Additives macromolecular
-
- 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
- C08K3/30—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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to a water-based high-filling white primer for an MDF board, which is prepared from the following raw materials in percentage by mass: aqueous pure acrylic emulsion: 30-35%, water-based styrene-acrylic emulsion: 10% -15%; titanium dioxide: 10-15%, modified paint powder preparation: 20% -27%, defoaming agent: 0.3% -0.4%, anti-explosion foam agent: 0.6-0.8%, wetting agent: 0.3-1.0%, 1.2-2.0% of dispersant, 4.0-5.0% of cosolvent, deionized water: 5.0-8.0%, rheological additive: 0.5 to 1.0 percent. The product of the invention can be directly sprayed on MDF plates, has good room temperature drying performance, and does not bubble or generate pinholes; the crack is avoided during the forced hot air drying, and the construction is efficient and convenient; the coating cost is saved while the coating effect is ensured.
Description
Technical Field
The invention belongs to the field of water-based wood coatings, and particularly relates to a water-based high-filling white primer for an MDF board and a preparation method thereof.
Background
In recent years, wood and its products are in ChinaThe industry develops rapidly, especially the artificial board industry breaks through 4 hundred million m for the first time in 2019 year of national yield 3 In 2020, it is up to 4.19 hundred million m 3 Wherein the annual yield of the fiberboard is about 0.87 hundred million m 3 . The Medium Density Fiberboard (MDF) has the largest use amount, is widely applied to the manufacture of living and office furniture, and is an extremely important wood material. The Medium Density Fiberboard (MDF) is a board prepared by taking wood fibers or other plant fibers as raw materials through fiber preparation, applying synthetic resin and pressing under the conditions of heating and pressurizing, and the density of the medium density fiberboard is 0.65-0.80 g/cm 3 . The MDF board is a homogeneous porous material, has low cost, simple processing, high comprehensive utilization rate of wood, and excellent mechanical and machining properties, is widely used in furniture manufacturing industry, building industry and indoor decoration industry, is a substitute material of natural wood, and accords with the sustainable development of wood.
However, also due to the low density and porous nature of MDF boards, problems such as poor filling, blistering, etc. occur when conventional wood lacquer white bases are directly sprayed. When the MDF board is applied to the field of wood doors, most wood door enterprises use reciprocating mechanical spraying for construction, and hot air forced drying is immediately carried out after construction to achieve the purpose of rapid offline. This can easily cause the problems of thick coating, explosion, cracking, pinholes and the like of the white primer film. Therefore, it is necessary to invent a high-filling water-based hot-air-drying white primer suitable for an MDF board, so that the white primer can be directly applied to an MDF base material, thereby ensuring a good filling effect, and simultaneously, the hot-air forced drying can not generate defects such as pinholes, blisters, cracks and the like. All indexes of the product reach the national standard GB/T23999-2009.
For example: patent document CN106833295A discloses a high abrasion resistant UV white primer for electrostatic spraying, comprising: 40-70 parts of epoxy acrylic resin, 15-35 parts of hydroxyl acrylic resin, 10-20 parts of thermoplastic acrylic resin, 15-30 parts of tripropylene glycol diacrylate, 5-25 parts of modified graphene, 2-6 parts of nano silicon dioxide, 1-5 parts of nano titanium dioxide, 1-5 parts of heavy calcium carbonate, 5-15 parts of montmorillonite, 10-20 parts of white pigment, 2-5 parts of zinc stearate, 2-6 parts of sodium hydroxymethyl cellulose, 1-5 parts of polyamide wax, 0.5-2 parts of flatting agent, 0.1-0.5 part of defoaming agent, 2-6 parts of photoinitiator and 5-15 parts of organic solvent. However, the invention disclosed in the document is in the field of UV electrostatic spraying construction, and the invention has high requirements on coating equipment and construction process of a factory; and is not suitable for coating medium and large-sized furniture such as wooden doors, plate-type furniture and the like. Patent document CN108977036A discloses a PU white primer comprising: 30-50 parts of resin, 0.1-0.5 part of wetting dispersant, 0.5-1.5 parts of organic bentonite, 2-6 parts of mixed butyl ester, 0.1-0.5 part of defoamer, 10-20 parts of titanium dioxide, 30-40 parts of paint powder, 3-8 parts of talcum powder, 0.5-1.5 parts of zinc stearate, 0.2-0.8 part of drier, 0.1-0.5 part of dust-proof wax, 0.01-0.1 part of flatting agent and 1-5 parts of sec-butyl ester, and has strong covering power, good adhesive force, good sanding property and low gloss. However, the invention disclosed in the document is in the field of traditional oil-based paint, cannot meet environmental regulations in most places in China, contains more organic solvents compared with water-based paint, and is not suitable for the coating fields of cabinets, children toys and the like.
Disclosure of Invention
The invention aims to provide a water-based high-filling hot air drying white primer for an MDF board and a preparation method thereof, and aims to solve the problems of filling deviation, thick coating blistering, hot air forced drying, pinhole, blister, cracking and the like in the prior art.
The invention discloses a water-based high-filling white primer for an MDF board, which is characterized by being prepared from the following raw materials in percentage by mass: aqueous acrylic emulsion: 30-35%, water-based styrene-acrylic emulsion: 10% -15%; titanium dioxide: 10% -15%, modifying to prepare paint powder: 20-27%, defoamer: 0.3% -0.4%, anti-explosion foam agent: 0.6-0.8%, wetting agent: 0.3-1.0%, 1.2-2.0% of dispersant, 4.0-5.0% of cosolvent, deionized water: 5.0-8.0%, rheological additive: 0.5 to 1.0 percent;
the acrylic emulsion is a self-crosslinking acrylic polymer with the solid content of 37w% -43 w% and the molecular weight of 50-80 ten thousand, such as: the product of the Dow single-component self-drying acrylic acid emulsion 6060 or 3311 and the XK12 of DSM; the coating has the characteristics of quick drying, easy polishing and quick hardness establishment, and ensures the drying performance of a paint film at room temperature;
the styrene-acrylic emulsion is a core-shell structure styrene-acrylic emulsion with the mass solid content of 40-45%, wherein the mass fraction of acrylic acid is 4-5%, for example: the emulsion has small particle size control and narrow distribution, and is prepared from S7501 styrene acrylic emulsion of New Material company; the coating is prepared by a pre-emulsification semi-continuous emulsion polymerization method, the nuclear monomers are styrene and ethyl methacrylate, the glass transition temperature Tg is 80 ℃, and the hardness and the drying property of a paint film can be improved; the shell monomer is ethyl acrylate, isobutyl acrylate, 2-ethylhexyl methacrylate and acrylic acid, the glass transition temperature Tg is as low as-20 ℃, and the flexibility of a paint film can be ensured; the outer layer of the latex particles has abundant carboxyl, and an ionized layer with a certain thickness has very obvious effect on improving the wrapping property and the dispersibility of the pigment, so that the hot air drying cracking resistance of the white background is improved, and a dried paint film is compact.
The titanium dioxide is rutile titanium dioxide, has an average particle size of 0.4 mu m, is preferably R-895 titanium dioxide of Bailey coupling of the python, has high whiteness and low oil absorption, and can provide good covering power and low thixotropy for the coating;
the modified paint powder is made of SiO 2 、MgSiO 3 、CaSO 4 The powder is used as the main raw material, and 0.8-3.0 w% of Fe as the synthetic auxiliary material is added 2 O 3 Mixed ground modified composites such as: the average grain diameter of the DG-F38 prepared paint powder of Shanghai Chuangyu chemical industry is 14-15 mu m, wherein SiO is 2 ≥30.0w％、MgSiO 3 ≥20.0w％、CaSO 4 The whiteness is less than or equal to 40w percent, the whiteness is high, the granularity is uniform, the oil absorption is low, the suspension property is good, the fineness required by the product can be reached by directly adding the high-speed dispersion, the grinding is not needed, the quality is uniform and stable, the covering power of the product can be properly improved, and the comprehensive performance of the product is enhanced;
the anti-explosion foam agent is a mixture anti-explosion foam agent of surface-active low-molecular-weight polymers for polyurethane baking paint, such as: BYKETOL-AQ available from BYK or Cold available from Puff TM BP-080; the defoaming agent is polyether siloxane copolymer defoaming agent, such as: the winning TEGO901W is matched with the anti-explosion foam agent for use, has long-acting and high-efficiency anti-explosion and defoaming efficiency, and ensures that a paint film is thickly coated on a porous MDF plate and is forcedly dried by hot airThe foam is not easy to explode;
the wetting agent is organic siloxane gemini structure surfactant (such as TEGO-4100) and/or polyether modified polydimethylsiloxane (such as BYK-349), can achieve good substrate wetting capacity by matching and is unstable in foam;
the dispersant is an organic modified polyacrylate solution containing high pigment affinity groups and/or a polyacrylic acid sodium salt dispersant, such as: TEGO-755W and Dow have the advantages of rapidness, easiness, high dispersion efficiency and good stability;
the rheological additive is polyether polyurethane rheological additive (such as thickener FX1010 and R299 of Haimines) and/or modified polyurea rheological additive (such as BYK-7420), and can improve the anti-sagging capability of a system and prevent powder sedimentation by matching;
the cosolvent is one or more of dipropylene glycol butyl ether, dipropylene glycol methyl ether and diethylene glycol butyl ether.
The invention discloses a preparation method of a water-based high-filling white primer for an MDF board, which is characterized by comprising the following steps of:
(1) stirring part of the deionized water, all of the defoaming agent, part of the wetting dispersant and part of the rheological additive for 3-10 min at the speed of 200-400 r/min; then adding the titanium dioxide and the modified paint powder, and dispersing at the speed of 1200-2500 r/min for at least 20min until the fineness of the mixed slurry is less than or equal to 30 mu m to obtain white slurry;
(2) adding the water-based pure acrylic emulsion and the water-based styrene-acrylic emulsion into a material preparation tank, adding the anti-explosion agent and the rest of the wetting dispersant, and dispersing at a speed of 1200-2000 r/min for at least 15min until the slurry has no shrinkage cavity on a glass plate; adding the mixture of the cosolvent and the rest of the deionized water into the mixture at the speed of 800-1500 r/min, continuing to disperse for 10-20 min, and then adding the rest of the rheological additive to obtain resin slurry;
(3) adding the white slurry into the resin slurry under stirring at a speed of 800-1500 r/min; dispersing for 15-30 min at the speed of 1200-2000 r/min until the fineness of the scraping fineness board is less than or equal to 30 mu m, and adjusting the viscosity to be qualified to obtain the water-based high-filling white primer;
furthermore, the viscosity of the main paint at 25 ℃ for 4 cups is required to be 100-110 s, and the pH value is 8.0-9.0.
Compared with the prior art, the invention has the following advantages:
according to the invention, the special styrene-acrylic emulsion with the core-shell structure is adopted, the powder wrapping property of the emulsion is good, the emulsion is not cracked after forced hot air drying, a paint film is compact after film forming, and the drying property of the paint film at room temperature can be ensured by matching with the quick-drying type self-crosslinking pure acrylic emulsion; rutile type titanium dioxide is selected to match with modified paint powder to serve as a powder filler; compared with the traditional fillers such as talcum powder and heavy calcium carbonate powder, the coating of the modified paint powder has better covering power, filling property and polishing property, and the coating still has low thixotropy and unstable foam when a larger amount of the modified paint powder is added due to the characteristic of low oil absorption.
The defoaming system preferably selects an anti-explosion foaming agent for polyurethane baking paint and a macromolecular copolymer defoaming agent to further ensure the foam inhibition and defoaming capability of the coating system; when the spray gun is applied to reciprocating mechanical spraying of MDF boards, construction bubbles can not be generated, and when hot air forced drying is carried out, pinhole defects caused by bubbles can not be generated; the paint film is flat and does not crack after being dried; after polishing, the finish paint is sprayed, and the luster and the fullness are not affected.
Besides excellent physical properties, the product of the invention can pass the environmental protection detection: 1. american Standard ASTM F963 determination of soluble eight heavy metals + total lead; 2. carrying out migration determination on specific elements in European standard EN 71-319; 3. measuring the content of heavy metal in Canada; 4. phthalate 19 item assay; 5. PAHS polycyclic aromatic hydrocarbon 18 (first type) assay; 6. GB 18581 determination of formaldehyde content. Therefore, the product of the invention is not only suitable for coating conventional furniture and wooden doors, but also suitable for coating wooden toys for children with extremely high environmental protection requirements.
The product of the invention can be directly sprayed on MDF plates, has good room temperature drying performance, and does not bubble or pinhole; the crack is avoided during the forced hot air drying, and the construction is efficient and convenient; under the condition that the solid content is improved by about 10 percent compared with the commercial competitive products and the filling property is obviously improved, the construction foamless film thickness can still reach 250 mu m, the use of companies such as wooden doors, panel furniture and the like with higher mechanical construction degree can be met, the coating effect is ensured, and the coating cost is saved.
Detailed Description
The present invention will be further described with reference to the following examples. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.
The raw materials in this example are all commercially available products.
Example 1
The water-based high-filling white primer for the MDF board comprises the following raw material components in percentage by mass:
aqueous self-crosslinking acrylic emulsion (dow 3311): 35 percent; aqueous styrene-acrylic emulsion (yochen S7501): 12 percent; rutile titanium dioxide R895: 12 percent; DG-F38 modified powder paint preparation: 27%; defoaming agent TEGO 901W: 0.2 percent; explosion-proof agent BYKETOL-AQ: 0.8%, wetting agents TEGO 4100: 0.3% and BYK 349: 0.2%, dispersant TEGO 755W: 0.5% and fast and easy: 1.0%, cosolvent DPM: 2% and DPNB: 3%, deionized water: 5.3 percent; rheological aid BYK 7420: 0.2%, FX 1010: 0.3% and R299: 0.2 percent;
the main paint is prepared by adopting the following steps:
(1) stirring 2/5 of the deionized water, the total defoamer, 2/3 of the wetting dispersant, and 1/3 of the rheological aid at a rate of 300r/min for 8 min; then adding the titanium dioxide and the prepared paint powder, and dispersing at the speed of 1500r/min for 20min until the fineness of the mixed slurry is less than or equal to 30 mu m to obtain white slurry;
(2) adding the self-crosslinking emulsion and the water-based styrene-acrylic emulsion into a preparation tank, adding the rest wetting dispersant and all the anti-explosion foam, and dispersing at the speed of 1500r/min for 20min until the slurry has no shrinkage cavity on a glass plate; adding the mixture of the cosolvent and the rest of the deionized water into the mixture at the speed of 1200r/min, continuously dispersing for 15min, and then adding the rest of the rheological additive to obtain resin slurry;
(3) adding the white slurry to the resin slurry with stirring at a rate of 1200 r/min; dispersing at the speed of 1500r/min for 20min until the fineness of the scraped fine board is less than or equal to 30 mu m, coating 4 cups at the temperature of 25 ℃ with the viscosity of 103s and the pH value of 8.1, and adjusting the viscosity to be qualified to obtain the water-based high-filling hot air drying white primer suitable for the MDF board;
at a temperature of 26 ℃ and a humidity of 63%, the coating weight is 250g/m 2 And (3) carrying out spraying construction on the MDF board, immediately carrying out hot air forced drying at 50 ℃ for 60min after the spraying is finished, and then airing to room temperature for carrying out related performance detection.
Example 2
The water-based high-filling white primer for the MDF board comprises the following raw materials in percentage by mass:
aqueous self-crosslinking acrylic emulsion (dow 3311): 35 percent; aqueous styrene-acrylic emulsion (yochen S7501): 15 percent; rutile titanium dioxide R895: 12 percent; DG-F38 modified powder paint preparation: 24 percent; defoaming agent TEGO 901W: 0.2 percent; explosion-proof agent BYKETOL-AQ: 0.8%, wetting dispersant TEGO 4100: 0.3% and BYK 349: 0.2%, dispersant TEGO 755W: 0.5% and fast and easy: 1.0%, cosolvent DPM: 2% and DPNB: 3%, deionized water: 5.3 percent; rheological aid BYK 7420: 0.2%, FX 1010: 0.3% and R299: 0.2 percent;
the main paint is prepared by adopting the following steps:
(1) stirring 3/5 of the deionized water, the total defoamer, 2/3 of the wetting dispersant, and 1/2 of the rheological aid at a rate of 250r/min for 10 min; then adding the titanium dioxide, the talcum powder and the heavy calcium powder, and dispersing at the speed of 2000r/min for 20min until the fineness of the mixed slurry is less than or equal to 30 mu m to obtain white slurry;
(2) adding the self-crosslinking emulsion and the water-based styrene-acrylic emulsion into a preparation tank, adding the rest wetting dispersant and all the anti-explosion foaming agent, and dispersing at the speed of 1800r/min for 17min until no shrinkage cavity exists on the glass plate; adding the mixture of the cosolvent and the rest of the deionized water into the mixture at the speed of 1500r/min, continuously dispersing for 10min, and then adding the rest of the rheological additive to obtain resin slurry;
(3) adding the white slurry into the resin slurry under stirring at a speed of 800 r/min; dispersing at the speed of 1700r/min for 18min until the fineness of the scraped fine board is less than or equal to 30 mu m, coating at 25 ℃ for 4 cups, adjusting the viscosity to be qualified and obtaining the water-based high-filling hot air drying white primer suitable for the MDF board, wherein the viscosity is 110s, the pH value is 8.3;
and (3) carrying out spraying construction on the MDF board according to the coating weight of 250 g/square meter at the temperature of 26 ℃ and the humidity of 63% at room temperature, immediately carrying out hot air forced drying at 50 ℃ for 60min after the spraying is finished, and then airing to room temperature for carrying out related performance detection.
Example 3
A water-based high-filling white primer for MDF boards comprises the following raw materials in percentage by mass:
aqueous self-crosslinking acrylic emulsion (dow 6060): 32 percent; aqueous styrene-acrylic emulsion (yochen S7501): 15 percent; rutile type titanium dioxide R895: 14 percent; DG-F38 modified powder paint preparation: 25 percent; defoaming agent TEGO 901W: 0.2 percent; anti-explosion foaming agent Coadd TM BP-080: 0.7%, wetting dispersant TEGO 4100: 0.3% and BYK 349: 0.2%, dispersant TEGO 755W: 0.5% and fast and easy: 1.0%, cosolvent DPM: 2% and DPNB: 3%, deionized water: 5.4 percent; rheological aid BYK 7420: 0.2%, FX 1010: 0.3% and R299: 0.2 percent;
the main paint is prepared by adopting the following steps:
(1) stirring 3/5 of the deionized water, the total defoamer, 2/3 of the wetting dispersant, and 1/2 of the rheological aid at a rate of 250r/min for 10 min; then adding the titanium dioxide, the talcum powder and the heavy calcium powder, and dispersing at the speed of 2000r/min for 20min until the fineness of the mixed slurry is less than or equal to 30 mu m to obtain white slurry;
(2) adding the self-crosslinking emulsion and the water-based styrene-acrylic emulsion into a preparation tank, adding the rest wetting dispersant and all the anti-explosion foaming agent, and dispersing at the speed of 1800r/min for 17min until no shrinkage cavity exists on the glass plate; adding the mixture of the cosolvent and the rest of the deionized water into the mixture at the speed of 1500r/min, continuously dispersing for 10min, and then adding the rest of the rheological additive to obtain resin slurry;
(3) adding the white slurry into the resin slurry under stirring at a speed of 800 r/min; dispersing at the speed of 1700r/min for 18min until the fineness of the scraped fine board is less than or equal to 30 mu m, coating at 25 ℃ for 4 cups, adjusting the viscosity to be qualified and obtaining the water-based high-filling hot air drying white primer suitable for the MDF board, wherein the viscosity is 110s, the pH value is 8.3;
and (3) carrying out spraying construction on the MDF board according to the coating weight of 250 g/square meter at the temperature of 26 ℃ and the humidity of 63% at room temperature, immediately carrying out hot air forced drying at 50 ℃ for 60min after the spraying is finished, and then airing to room temperature for carrying out related performance detection.
Example 4
The water-based high-filling white primer for the MDF board comprises the following raw material components in percentage by mass:
aqueous self-crosslinking acrylic emulsion (dow 6060): 35 percent; aqueous styrene-acrylic emulsion (yochen S7501): 10 percent; rutile type titanium dioxide R895: 15 percent; DG-F38 modified powder paint preparation: 26 percent; defoaming agent TEGO 901W: 0.2 percent; anti-explosion foaming agent Coadd TM BP-080: 0.8%, wetting agents TEGO 4100: 0.3% and BYK 349: 0.2%, dispersant TEGO 755W: 0.5% and fast and easy: 1.0%, cosolvent DPM: 2% and DPNB: 3%, deionized water: 5.3 percent; rheological aid BYK 7420: 0.2%, FX 1010: 0.3% and R299: 0.2 percent;
the main paint is prepared by adopting the following steps:
(1) stirring 2/5 of the deionized water, the total defoamer, 2/3 of the wetting dispersant, and 1/3 of the rheological aid at a rate of 300r/min for 8 min; then adding the titanium dioxide and the prepared paint powder, and dispersing at the speed of 1500r/min for 20min until the fineness of the mixed slurry is less than or equal to 30 mu m to obtain white slurry;
(2) adding the self-crosslinking emulsion and the water-based styrene-acrylic emulsion into a preparation tank, adding the rest wetting dispersant and all the anti-explosion foam, and dispersing at the speed of 1500r/min for 20min until the slurry has no shrinkage cavity on a glass plate; adding the mixture of the cosolvent and the rest of the deionized water into the mixture at the speed of 1200r/min, continuously dispersing for 15min, and then adding the rest of the rheological additive to obtain resin slurry;
(3) adding the white slurry to the resin slurry with stirring at a rate of 1200 r/min; dispersing at the speed of 1500r/min for 20min until the fineness of the scraped fine board is less than or equal to 30 mu m, coating at 25 ℃ for 4 cups with the viscosity of 103s and the pH value of 8.1, and adjusting the viscosity to be qualified to obtain the water-based high-filling hot air drying white primer suitable for the MDF board;
and (3) carrying out spraying construction on the MDF board according to the coating weight of 250 g/square meter at the temperature of 26 ℃ and the humidity of 63% at room temperature, immediately carrying out hot air forced drying at 50 ℃ for 60min after the spraying is finished, and then airing to room temperature for carrying out related performance detection.
Example 5
The water-based high-filling white primer for the MDF board comprises the following raw material components in percentage by mass:
15% of water-based self-crosslinking acrylic emulsion (Dow 6060) and 20% of water-based self-crosslinking acrylic emulsion (Dow 3311); aqueous styrene-acrylic emulsion (yochen S7501): 12 percent; rutile type titanium dioxide R895: 13 percent; DG-F38 modified powder paint preparation: 26 percent; defoamer TEGO 901W: 0.2 percent; anti-explosion foaming agent Coadd TM BP-080: 0.8%, wetting agents TEGO 4100: 0.3% and BYK 349: 0.2%, dispersant TEGO 755W: 0.5% and fast and easy: 1.0%, cosolvent DPM: 2% and DPNB: 3%, deionized water: 5.3 percent; rheological aid BYK 7420: 0.2%, FX 1010: 0.3% and R299: 0.2 percent;
the main paint is prepared by adopting the following steps:
(1) stirring 2/5 of the deionized water, the total defoamer, 2/3 of the wetting dispersant, and 1/3 of the rheology aid at a rate of 300r/min for 8 min; then adding the titanium dioxide and the prepared paint powder, and dispersing at the speed of 1500r/min for 20min until the fineness of the mixed slurry is less than or equal to 30 mu m to obtain white slurry;
(2) adding the self-crosslinking emulsion and the water-based styrene-acrylic emulsion into a preparation tank, adding the rest wetting dispersant and all the anti-explosion foam, and dispersing at the speed of 1500r/min for 20min until the slurry has no shrinkage cavity on a glass plate; adding the mixture of the cosolvent and the rest of the deionized water into the mixture at the speed of 1200r/min, continuously dispersing for 15min, and then adding the rest of the rheological additive to obtain resin slurry;
(3) adding the white slurry to the resin slurry with stirring at a rate of 1200 r/min; dispersing at the speed of 1500r/min for 20min until the fineness of the scraped fine board is less than or equal to 30 mu m, coating 4 cups at the temperature of 25 ℃ with the viscosity of 103s and the pH value of 8.1, and adjusting the viscosity to be qualified to obtain the water-based high-filling hot air drying white primer suitable for the MDF board;
and (3) carrying out spraying construction on the MDF board according to the coating weight of 250 g/square meter at the temperature of 26 ℃ and the humidity of 63% at room temperature, immediately carrying out hot air forced drying at 50 ℃ for 60min after the spraying is finished, and then airing to room temperature for carrying out related performance detection.
Comparative example 1
The competitive product jabotai water-based single-component white primer is subjected to spraying construction on an MDF plate according to the coating weight of 250 g/square meter at the temperature of 26 ℃ and the humidity of 63 percent at room temperature, is immediately subjected to hot air forced drying at 50 ℃ for 60min after the spraying is finished, and is dried to room temperature for relevant performance detection.
Comparative example 2
The competitive product clivia aqueous single-component high-filling white primer is coated at the temperature of 26 ℃ and the humidity of 63 percent according to the coating weight of 250g/m 2 And (3) carrying out spraying construction on the MDF board, immediately carrying out hot air forced drying at 50 ℃ for 60min after the spraying is finished, and then airing to room temperature for carrying out related performance detection.
The test results of the examples 1 to 5 are shown in Table 1 according to the common test items of the water-based white primer
TABLE 1 results of the correlation Performance test of examples 1 to 5 and comparative examples 1 to 2
As can be seen from Table 1, the workability of examples 1-5 is higher in solid content, faster in drying speed and higher in contrast ratio compared with comparative example 1 and comparative example 2, and the coating can be directly sprayed on an MDF plate, is good in room temperature drying performance, and does not bubble or generate pinholes; the crack is avoided during the forced hot air drying, and the construction is efficient and convenient; has obvious performance advantage and wide market prospect.
Claims (9)
1. The water-based high-filling white primer for the MDF board is characterized by being prepared from the following raw materials in percentage by mass: aqueous acrylic emulsion: 30-35%, water-based styrene-acrylic emulsion: 10% -15%; titanium dioxide: 10-15%, modified paint powder preparation: 20% -27%, defoaming agent: 0.3% -0.4%, anti-explosion foam agent: 0.6-0.8%, wetting agent: 0.3-1.0%, 1.2-2.0% of dispersant, 4.0-5.0% of cosolvent, deionized water: 5.0% -8.0%, rheological additive: 0.5 to 1.0 percent.
2. The water-based high-filling white primer according to claim 1, wherein the acrylic emulsion is a self-crosslinking acrylic polymer with a solid content of 37w% -43 w% and a molecular weight of 50-80 ten thousand; the styrene-acrylic emulsion is a core-shell structure styrene-acrylic emulsion with the mass solid content of 40-45%, wherein the mass fraction of acrylic acid is 4-5%.
3. The water-based highly filled white primer according to claim 1, wherein said modified powder lacquer is a powder lacquer made of SiO 2 、MgSiO 3 、CaSO 4 The powder is used as the main raw material, and 0.8-3.0 w% of Fe as the synthetic auxiliary material is added 2 O 3 The average particle size of the mixed and ground modified composite material is 14-15 mu m.
4. The water-based high filling white primer according to claim 1, wherein the anti-explosion foam agent is a mixture of surface active low molecular weight polymers for polyurethane baking paint.
5. The water-based high filling white primer according to claim 1, wherein the titanium dioxide is rutile titanium dioxide, and the average particle size is 0.4 μm; the defoaming agent is polyether siloxane copolymer defoaming agent.
6. The water-based highly filled white primer according to claim 1, wherein the wetting agent is an organic siloxane gemini surfactant and/or polyether modified polydimethylsiloxane; the dispersant is organic modified polyacrylate solution containing high pigment affinity group and/or sodium polyacrylate dispersant.
7. The water-based high filling white primer according to claim 1, characterized in that the rheological additive is a polyether polyurethane type rheological additive and/or a modified polyurea type rheological additive; the cosolvent is one or more of dipropylene glycol butyl ether, dipropylene glycol methyl ether and diethylene glycol butyl ether.
8. The preparation method of the water-based high filling white primer according to any one of claims 1 to 7, characterized by comprising the following steps:
(1) stirring part of the deionized water, all of the defoaming agent, part of the wetting dispersant and part of the rheological additive for 3-10 min at the speed of 200-400 r/min; then adding the titanium dioxide and the modified paint powder, and dispersing at the speed of 1200-2500 r/min for at least 20min until the fineness of the mixed slurry is less than or equal to 30 mu m to obtain white slurry;
(2) adding the water-based pure acrylic emulsion and the water-based styrene-acrylic emulsion into a material preparation tank, adding the anti-explosion agent and the rest of the wetting dispersant, and dispersing at a speed of 1200-2000 r/min for at least 15min until the slurry has no shrinkage cavity on a glass plate; adding the mixture of the cosolvent and the rest of the deionized water into the mixture at the speed of 800-1500 r/min, continuing to disperse for 10-20 min, and then adding the rest of the rheological additive to obtain resin slurry;
(3) adding the white slurry into the resin slurry under stirring at a speed of 800-1500 r/min; and dispersing for 15-30 min at the speed of 1200-2000 r/min until the fineness of the scraping fineness board is less than or equal to 30 mu m, and adjusting the viscosity to be qualified to obtain the water-based high-filling white primer.
9. The preparation method of the water-based high filling white primer according to claim 8, characterized in that the 4 cup viscosity of the main paint at 25 ℃ is required to be 100-110 s, and the pH value is 8.0-9.0.
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