CN114479638B - Ultrafast-drying aqueous primer coat for automobile repair and preparation method thereof - Google Patents
Ultrafast-drying aqueous primer coat for automobile repair and preparation method thereof Download PDFInfo
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- 238000001035 drying Methods 0.000 title claims abstract description 87
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 230000008439 repair process Effects 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000002270 dispersing agent Substances 0.000 claims abstract description 65
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 45
- 239000004814 polyurethane Substances 0.000 claims abstract description 40
- 229920002635 polyurethane Polymers 0.000 claims abstract description 40
- 239000000049 pigment Substances 0.000 claims abstract description 38
- 239000000945 filler Substances 0.000 claims abstract description 35
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 22
- 238000000227 grinding Methods 0.000 claims abstract description 22
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 22
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 22
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002562 thickening agent Substances 0.000 claims abstract description 17
- 239000013538 functional additive Substances 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims description 30
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 24
- 239000012752 auxiliary agent Substances 0.000 claims description 17
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 16
- 235000010413 sodium alginate Nutrition 0.000 claims description 16
- 239000000661 sodium alginate Substances 0.000 claims description 16
- 229940005550 sodium alginate Drugs 0.000 claims description 16
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 14
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims description 14
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 14
- 239000004246 zinc acetate Substances 0.000 claims description 14
- 239000004408 titanium dioxide Substances 0.000 claims description 12
- 239000005995 Aluminium silicate Substances 0.000 claims description 11
- 235000012211 aluminium silicate Nutrition 0.000 claims description 11
- 239000006229 carbon black Substances 0.000 claims description 11
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 229910052726 zirconium Inorganic materials 0.000 claims description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 claims description 2
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 2
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims 1
- 229910052623 talc Inorganic materials 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 41
- 239000011248 coating agent Substances 0.000 abstract description 30
- 238000007667 floating Methods 0.000 abstract description 29
- 239000003973 paint Substances 0.000 description 30
- 238000012360 testing method Methods 0.000 description 17
- 238000005498 polishing Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 13
- 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 11
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000005507 spraying Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 244000137852 Petrea volubilis Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229920003180 amino resin Polymers 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 natural color finish Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention belongs to the technical field of environment-friendly coatings, and particularly relates to an ultra-fast-drying aqueous middle coating for automobile repair and a preparation method thereof. The invention provides an ultra-fast-drying water-based floating coat for repairing an automobile, which comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 12-14% of aqueous hydroxyl polyacrylic acid dispersoid, 26-28% of aqueous polyurethane dispersoid, 17-20% of pigment, 16.8-20.6% of filler, 0.2-0.4% of functional additive, 1-2% of aqueous dispersant, 2-4% of polyurethane thickener and 11-25% of water; the component B comprises the following components in percentage by mass: 50-70% of curing agent and 30-50% of propylene glycol methyl ether acetate. The coating product has the advantages of high drying speed, good grinding performance and capability of well meeting the use requirement of quick repair in the automobile repair industry, and the problem of difficulty in grinding caused by high drying speed can be solved.
Description
Technical Field
The invention belongs to the technical field of environment-friendly coatings, and particularly relates to an ultra-fast-drying aqueous intermediate coating for automobile repair and a preparation method thereof.
Background
With the development of socio-economy, automobiles become indispensable vehicles in today's society, and the number thereof is increasing year by year. As a necessary link in the automobile production process, the automobile coating plays a significant role in the automobile manufacturing process, the quality of the automobile body paint film and the aesthetic degree of the automobile body color are the most intuitive evaluation, and the automobile coating has important significance in improving the evaluation of consumers on automobiles. With the development of the automobile industry, automobile spraying materials and spraying technologies are gradually improved, and more novel technologies are developed and utilized from extensive production to fine control.
The automobile coating is a coating coated on bodies and parts of various vehicles such as cars, trucks and the like. Since the 21 st century, the economy of China has been rapidly developed, and the automobile industry has been rapidly developed, thereby promoting the improvement of the type and quality of the automobile coating. Although the current home and abroad automobile coatings are mainly solvent-based coatings, the coatings contain a large amount of volatile organic compounds, which not only cause harm to human bodies, but also cause pollution to the environment. The water-based automobile coating is important for reducing the emission of VOC and enabling the whole coating industry to develop towards environmental protection, green and sustainable development, so that the development of the water-based automobile coating is trended.
The types of the automobile coatings are various, and the automobile coatings are classified into liquid coatings (including solvent type, water-based type and water slurry type), powder coatings, paste coatings (such as putty and PVC coatings) and the like according to forms; the paint can be divided into anticorrosive paint, heat-insulating paint, waterproof paint, sound-insulating and shock-absorbing paint and the like according to functions; the paint can be divided into primer, intermediate paint, natural color finish, metal flash base paint, finishing varnish and the like according to construction procedures. The automobile middle coating is a coating layer after an electrophoretic coating and is used for better connecting an electrophoretic layer serving as a primer and a colored paint layer, and has a decisive effect on the quality of the whole automobile paint film. For the automobile repair industry, the drying speed of the paint is always a hard index required by the industry, and for the water-based paint, the drying speed is seriously slower than that of the conventional oil-based paint, so that the popularization and the use of the water-based paint are directly restricted.
Chinese patent application CN101624496A discloses a water-based primer surfacer for automobile coating, which consists of 40-60% of water-dispersed resin, 25% of pigment filler, 5% of auxiliary agent and 10-30% of water, wherein the main components of the water-dispersed resin comprise hydrophilic polyester resin and water-based amino resin, the pigment filler can be titanium dioxide, the auxiliary agent can be acrylate, and the water can be distilled water; dispersing the pigment and filler at high speed, grinding to fineness of 15um or less, mixing water-dispersible resin with the ground pigment and filler, adding adjuvant and distilled water, and dispersing at high speed again. Chinese patent application CN105754463A discloses an automobile water-based floating coat paint, which comprises main paint and a curing agent, wherein the main paint comprises the following components in parts by weight: 15-35% of water-based polyester resin, 25-35% of water-based epoxy resin, 15-25% of water-soluble pigment, 3-5% of talcum powder, 15-25% of calcium carbonate, 0.1-0.5% of water-based polyurethane defoaming agent, 0.3-0.8% of water-based methylated amino resin, 0.1-0.5% of fumed silica anti-settling agent, 0.1-0.5% of flatting agent, 0.5-1.5% of wetting agent, 1-2% of anti-flash rust agent and the balance of deionized water; the curing agent is a closed water-based isocyanate curing agent; the weight ratio of the main paint to the curing agent is 10-15: 1. Although the above-mentioned coating materials are all water-based coating materials, they all have a drawback of slow drying.
The existing water-based floating coat products on the market are few and belong to a new product, the floating coat on the market generally has the problem of slow drying, and the water-based floating coat products with high drying speed have the defects of difficult polishing caused by high drying speed, poor polishing performance and the like. Therefore, there is a need in the market for a water-based intermediate coating product having the advantages of high drying speed, good polishing performance and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an ultra-fast drying water-based floating coat for repairing an automobile and a preparation method thereof. The ultra-fast dry waterborne floating coat for repairing the automobile, provided by the invention, has the advantages of high drying speed, capability of avoiding the problem of difficulty in polishing caused by high drying speed, good polishing performance and capability of well meeting the use requirement of fast repair in the automobile repair industry.
The technical scheme of the invention is as follows:
the ultra-fast-drying water-based primer surfacer for repairing the automobile comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 12-14% of aqueous hydroxyl polyacrylic acid dispersoid, 26-28% of aqueous polyurethane dispersoid, 17-20% of pigment, 16.8-20.6% of filler, 0.2-0.4% of functional additive, 1-2% of aqueous dispersant, 2-4% of polyurethane thickener and 11-25% of water;
the component B comprises the following components in percentage by mass: 50-70% of curing agent and 30-50% of propylene glycol methyl ether acetate.
Further, the ultra-fast drying water-based intermediate coat for repairing the automobile comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 13% of aqueous hydroxyl polyacrylic acid dispersoid, 28% of aqueous polyurethane dispersoid, 19% of pigment, 18% of filler, 0.3% of functional additive, 1.5% of aqueous dispersant, 3% of polyurethane thickener and 17.2% of water;
the component B comprises the following components in percentage by mass: 60% of curing agent and 40% of propylene glycol methyl ether acetate.
Further, the pigment is one or more of titanium dioxide, carbon black, aluminum tripolyphosphate, iron oxide yellow, iron oxide red, phthalocyanine blue and phthalocyanine green.
Further, the filler is one or more of calcium carbonate, kaolin, talcum powder and precipitated barium sulfate.
Further, the functional assistant is composed of polyvinyl alcohol and zinc acetate according to the mass ratio of 1-3: 8-10.
Further, the functional assistant consists of polyvinyl alcohol and zinc acetate according to a mass ratio of 2: 9.
Further, the aqueous dispersing agent is a combination of a BYK-190 dispersing agent, a BYK-2012 dispersing agent and sodium alginate.
Further, the mass ratio of the BYK-190 dispersing agent to the BYK-2012 dispersing agent to the sodium alginate is 12-15:7-9: 2-4.
Further, the mass ratio of the BYK-190 dispersing agent to the BYK-2012 dispersing agent to the sodium alginate is 13:8: 3.
Further, the curing agent is aliphatic polyisocyanate.
Further, the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 4-7.
Further, the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 5.
Another object of the present invention is to provide a method for preparing the ultra-fast drying aqueous middle coating for repairing automobiles, which comprises separately preparing A, B components, wherein,
the preparation method of the component A comprises the following steps:
(1) sequentially adding the aqueous hydroxyl polyacrylic acid dispersoid, the aqueous polyurethane dispersoid, water, the functional additive and the aqueous dispersant in the formula ratio, stirring at the speed of 200-400r/min, and stirring for 20-30 min;
(2) adding the pigment and the filler with the formula ratio into the step (1) in sequence, stirring at the speed of 500-800r/min, and stirring for 30-50 min;
(3) adding grinding zirconium beads into the step (2), grinding at the rotating speed of 1500r/min of 1200-;
the preparation method of the component B comprises the following steps:
adding propylene glycol monomethyl ether acetate and a curing agent under stirring at the rotating speed of 200-400r/min in a vacuum-pumping environment according to the formula amount of the component B, and stirring for 25-35min to obtain the component B.
The invention also provides a construction process of the ultrafast dry aqueous floating coat for repairing the automobile, which is used for construction by the ultrafast dry aqueous floating coat for repairing the automobile and comprises the following steps: under the standard environment (23 +/-2 ℃, 65 +/-5%), mixing the component A, the component B and deionized water according to the weight ratio of 6: 1: 0.5, spraying the mixture on a sprayed piece by adopting a two-step spraying mode, wherein the interval between every two steps is 3 minutes, and after the spraying is finished, the mixture can be self-dried for 1.5 hours or dried for 20 minutes at 50 ℃ for polishing.
The existing water-based floating coat products on the market are few, so that the floating coat belongs to a new product, and the floating coat on the market generally has the defects of slow drying, poor polishing performance and the like. According to the invention, the aqueous hydroxyl polyacrylic acid dispersoid and the aqueous polyurethane dispersoid are compounded to be used as a film-forming resin system, the aqueous hydroxyl polyacrylic acid dispersoid, the aqueous polyurethane dispersoid, the pigment, the filler, the functional auxiliary agent and the like are used as raw materials as a component A, and the curing agent and the propylene glycol methyl ether acetate are used as a component B, so that the prepared ultra-fast drying aqueous middle coat for repairing the automobile has the advantages of high drying speed, capability of avoiding the problem of difficult polishing caused by high drying speed, good polishing performance, easiness in polishing, no adhesion to sand paper, uniform and smooth surface after polishing, capability of effectively solving the practical operation problems of the drying performance and the polishing performance, capability of improving the use satisfaction degree of a user, basically equivalent performance to that of the traditional solvent-based middle coat, and capability of well meeting the use requirement of fast repair in the automobile repair industry.
In the invention, the functional auxiliary agent which is composed of polyvinyl alcohol and zinc acetate according to a specific proportion is added, and the interaction of the components in the functional auxiliary agent can not only obviously improve the drying speed of the surface of the paint film after the ultra-fast drying aqueous intermediate coating for automobile repair is sprayed, but also improve the drying speed of the inner part of the paint film, and can also avoid the problem of difficult grinding caused by high drying speed, and the grinding performance is good. Besides, the functional assistant can improve the adhesive force of a middle coating product. According to the invention, the added water-based dispersing agent consisting of the BYK-190 dispersing agent, the BYK-2012 dispersing agent and the sodium alginate according to a specific mass ratio can be tightly and firmly adsorbed on the surfaces of the pigment particles, so that the pigment particles are stably dispersed in a coating system for a long time, the storage stability of the coating system is improved, and the adhesive force between a middle coating product and an electrophoresis substrate as well as between the middle coating product and a base color paint or a metal paint can be improved. In the curing agent added in the invention, Bayhydur XP 2547 and Desmodur N3390 have synergistic effect, so that the crosslinking speed of the waterborne hydroxyl polyacrylic acid dispersoid and the waterborne polyurethane dispersoid with the curing agent can be greatly improved, the drying speed of a coating film at low temperature is improved, and the product has excellent quick drying property. In addition, the curing agent can effectively improve the crosslinking degree of a coating film and improve the adhesive force of a middle coating product.
Compared with the prior art, the invention has the following advantages:
(1) for the automobile repair industry, the drying speed of the paint is always a hard index required by the industry, and for the water-based paint, the drying speed is seriously slower than that of the conventional oil-based paint, so that the popularization and the use of the water-based paint are directly restricted.
(2) The drying time of the traditional oil floating coat is 1.5 hours, the water floating coat is more than 6 hours, the ultra-fast drying water floating coat for repairing the automobile can reach the drying speed of the oil floating coat, the automobile can be polished for 1.5 hours at normal temperature, and the automobile can be polished for 20 minutes under the condition of heating at 50 ℃.
(3) In terms of cost, deionized water is partially used as a solvent of the ultra-fast drying aqueous floating coat for repairing the automobile, so that the ultra-fast drying aqueous floating coat is cheaper in cost, higher in cost performance and more environment-friendly than an oily floating coat.
Detailed Description
The present invention is further described by the following description of the embodiments, which are not intended to limit the invention, and those skilled in the art can make various modifications or improvements based on the basic idea of the invention, but within the scope of the invention, without departing from the basic idea of the invention.
The starting materials used in the present invention are all commercially available unless otherwise specified.
The information on the manufacturer of each raw material in the following examples and comparative examples is shown in Table 1.
Table 1: information of purchasing manufacturer of each raw material
Example 1 ultra fast drying waterborne basecoat for automotive refinishing
The ultra-fast-drying water-based intermediate coat for repairing the automobile comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 12% of aqueous hydroxyl polyacrylic acid dispersoid, 26% of aqueous polyurethane dispersoid, 17% of pigment, 16.8% of filler, 0.2% of functional additive, 1% of aqueous dispersant, 2% of polyurethane thickener and 25% of water; the pigment consists of titanium dioxide and carbon black in a mass ratio of 5: 2; the filler consists of kaolin and talcum powder according to the mass ratio of 2: 1; the functional auxiliary agent consists of polyvinyl alcohol and zinc acetate according to the mass ratio of 1: 10; the water-based dispersing agent consists of a BYK-190 dispersing agent, a BYK-2012 dispersing agent and sodium alginate in a mass ratio of 12:9: 4.
The component B comprises the following components in percentage by mass: 50% of curing agent and 50% of propylene glycol methyl ether acetate; the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 7.
The preparation method of the ultrafast-drying aqueous floating coat for repairing the automobile comprises the following steps of respectively preparing A, B components, wherein the preparation method of the A component comprises the following steps:
(1) sequentially adding the aqueous hydroxyl polyacrylic acid dispersoid, the aqueous polyurethane dispersoid, water, the functional auxiliary agent and the aqueous dispersant according to the formula ratio, stirring at the speed of 200r/min, and stirring for 20 min;
(2) adding the pigment and the filler with the formula ratio into the step (1) in sequence, stirring at the speed of 500r/min, and stirring for 30 min;
(3) adding the ground zirconium beads into the step (2), grinding at the rotating speed of 1200r/min, grinding and dispersing for 1h, controlling the grinding fineness to be below 30 mu m, controlling the grinding temperature to be below 60 ℃, filtering after qualification, adding a polyurethane thickener to adjust the viscosity, and obtaining a component A;
the preparation method of the component B comprises the following steps:
adding propylene glycol methyl ether acetate and a curing agent under stirring at a rotating speed of 200r/min in a vacuum-pumping environment according to the formula amount of the component B, and stirring for 25min to obtain the component B.
Example 2 ultra fast drying waterborne basecoat for automobile repair
The ultra-fast-drying water-based intermediate coat for repairing the automobile comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 14% of aqueous hydroxyl polyacrylic acid dispersoid, 28% of aqueous polyurethane dispersoid, 20% of pigment, 20.6% of filler, 0.4% of functional additive, 2% of aqueous dispersant, 4% of polyurethane thickener and 11% of water; the pigment consists of titanium dioxide and carbon black in a mass ratio of 9: 1; the filler consists of kaolin and talcum powder according to the mass ratio of 4: 1; the functional auxiliary agent consists of polyvinyl alcohol and zinc acetate according to the mass ratio of 3: 8; the water-based dispersing agent is composed of a BYK-190 dispersing agent, a BYK-2012 dispersing agent and sodium alginate according to a mass ratio of 15:7: 2.
The component B comprises the following components in percentage by mass: 70% of curing agent and 30% of propylene glycol methyl ether acetate; the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 4.
The preparation method of the ultrafast dry aqueous middle coat for repairing the automobile comprises the following steps of respectively preparing A, B components, wherein the preparation method of the component A comprises the following steps:
(1) sequentially adding the aqueous hydroxyl polyacrylic acid dispersoid, the aqueous polyurethane dispersoid, water, the functional assistant and the aqueous dispersant according to the formula ratio, stirring at the speed of 400r/min, and stirring for 30 min;
(2) adding the pigment and the filler in the formula amount in sequence in the step (1), stirring at the speed of 800r/min, and stirring for 50 min;
(3) adding the ground zirconium beads into the step (2), grinding at the rotating speed of 1500r/min, grinding and dispersing for 2 hours until the grinding fineness is below 30 mu m, controlling the grinding temperature below 60 ℃, filtering after qualification, and adding a polyurethane thickener to adjust the viscosity to obtain a component A;
the preparation method of the component B comprises the following steps:
adding propylene glycol methyl ether acetate and a curing agent under stirring at a rotating speed of 400r/min in a vacuum-pumping environment according to the formula amount of the component B, and stirring for 35min to obtain the component B.
Example 3 ultra fast drying waterborne basecoat for automotive refinishing
The ultra-fast-drying water-based intermediate coat for repairing the automobile comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 13 percent of aqueous hydroxyl polyacrylic acid dispersoid, 28 percent of aqueous polyurethane dispersoid, 19 percent of pigment, 18 percent of filler, 0.3 percent of functional additive, 1.5 percent of aqueous dispersant, 3 percent of polyurethane thickener and 17.2 percent of water; the pigment consists of titanium dioxide and carbon black in a mass ratio of 6: 1; the filler consists of kaolin and talcum powder according to the mass ratio of 3: 1; the functional auxiliary agent consists of polyvinyl alcohol and zinc acetate according to the mass ratio of 2: 9; the water-based dispersing agent consists of a BYK-190 dispersing agent, a BYK-2012 dispersing agent and sodium alginate according to a mass ratio of 13:8: 3;
the component B comprises the following components in percentage by mass: 60% of curing agent and 40% of propylene glycol methyl ether acetate; the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 5.
The preparation method of the ultrafast dry aqueous middle coat for repairing the automobile comprises the following steps of respectively preparing A, B components, wherein the preparation method of the component A comprises the following steps:
(1) sequentially adding the aqueous hydroxyl polyacrylic acid dispersoid, the aqueous polyurethane dispersoid, water, the functional auxiliary agent and the aqueous dispersing agent according to the formula ratio, stirring at the speed of 350r/min, and stirring for 25 min;
(2) adding the pigment and the filler with the formula ratio into the step (1) in sequence, stirring at the speed of 700r/min, and stirring for 40 min;
(3) adding the grinding zirconium beads into the step (2), grinding at the rotating speed of 1400r/min, grinding and dispersing for 1.5h, controlling the grinding fineness to be below 30 mu m, controlling the grinding temperature to be below 60 ℃, filtering after qualification, and adding a polyurethane thickener to adjust the viscosity to obtain a component A;
the preparation method of the component B comprises the following steps:
adding propylene glycol methyl ether acetate and a curing agent under stirring at the rotating speed of 350r/min in a vacuum-pumping environment according to the formula amount of the component B, and stirring for 30min to obtain the component B.
Comparative example 1 ultra-fast drying aqueous primer for automobile repair
The ultra-fast-drying water-based intermediate coat for repairing the automobile comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 13 percent of aqueous hydroxyl polyacrylic acid dispersoid, 28 percent of aqueous polyurethane dispersoid, 19 percent of pigment, 18 percent of filler, 0.3 percent of functional additive, 1.5 percent of aqueous dispersant, 3 percent of polyurethane thickener and 17.2 percent of water; the pigment consists of titanium dioxide and carbon black in a mass ratio of 6: 1; the filler consists of kaolin and talcum powder according to the mass ratio of 3: 1; the functional auxiliary agent consists of polyvinyl alcohol and zinc acetate according to the mass ratio of 1: 1; the water-based dispersing agent consists of a BYK-190 dispersing agent, a BYK-2012 dispersing agent and sodium alginate in a mass ratio of 13:8: 3;
the component B comprises the following components in percentage by mass: 60% of curing agent and 40% of propylene glycol methyl ether acetate; the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 5.
The preparation method of the ultra-fast drying water-based floating coat for repairing the automobile is similar to that of the example 3.
The difference from the embodiment 3 is that the functional assistant consists of polyvinyl alcohol and zinc acetate according to the mass ratio of 1: 1.
Comparative example 2 an ultra-fast drying waterborne basecoat for automotive refinishing
The ultra-fast-drying water-based primer surfacer for repairing the automobile comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 13% of aqueous hydroxyl polyacrylic acid dispersoid, 28% of aqueous polyurethane dispersoid, 19% of pigment, 18% of filler, 0.3% of functional additive, 1.5% of aqueous dispersant, 3% of polyurethane thickener and 17.2% of water; the pigment consists of titanium dioxide and carbon black in a mass ratio of 6: 1; the filler consists of kaolin and talcum powder according to the mass ratio of 3: 1; the functional auxiliary agent is zinc acetate; the water-based dispersing agent consists of a BYK-190 dispersing agent, a BYK-2012 dispersing agent and sodium alginate according to a mass ratio of 13:8: 3;
the component B comprises the following components in percentage by mass: 60% of curing agent and 40% of propylene glycol methyl ether acetate; the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 5.
The preparation method of the ultra-fast drying water-based floating coat for repairing the automobile is similar to that of the example 3.
The difference from example 3 is that polyvinyl alcohol is not added to the functional assistant.
Comparative example 3 an ultra-fast drying waterborne basecoat for automotive refinishing
The ultra-fast-drying water-based primer surfacer for repairing the automobile comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 13 percent of aqueous hydroxyl polyacrylic acid dispersoid, 28 percent of aqueous polyurethane dispersoid, 19 percent of pigment, 18 percent of filler, 0.3 percent of functional additive, 1.5 percent of aqueous dispersant, 3 percent of polyurethane thickener and 17.2 percent of water; the pigment consists of titanium dioxide and carbon black in a mass ratio of 6: 1; the filler consists of kaolin and talcum powder according to the mass ratio of 3: 1; the functional auxiliary agent consists of polyvinyl alcohol and zinc acetate according to the mass ratio of 2: 9; the water-based dispersing agent consists of a BYK-190 dispersing agent, a BYK-2012 dispersing agent and sodium alginate in a mass ratio of 1:1: 1;
the component B comprises the following components in percentage by mass: 60% of curing agent and 40% of propylene glycol methyl ether acetate; the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 5.
The preparation method of the ultra-fast drying water-based floating coat for repairing the automobile is similar to that of the example 3.
The difference from example 3 is that the aqueous dispersant consists of a BYK-190 dispersant, a BYK-2012 dispersant and sodium alginate in a mass ratio of 1:1: 1.
Comparative example 4 an ultra-fast drying waterborne basecoat for automotive refinishing
The ultra-fast-drying water-based primer surfacer for repairing the automobile comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 13 percent of aqueous hydroxyl polyacrylic acid dispersoid, 28 percent of aqueous polyurethane dispersoid, 19 percent of pigment, 18 percent of filler, 0.3 percent of functional additive, 1.5 percent of aqueous dispersant, 3 percent of polyurethane thickener and 17.2 percent of water; the pigment consists of titanium dioxide and carbon black in a mass ratio of 6: 1; the filler consists of kaolin and talcum powder according to the mass ratio of 3: 1; the functional auxiliary agent consists of polyvinyl alcohol and zinc acetate according to the mass ratio of 2: 9; the water-based dispersing agent consists of a BYK-190 dispersing agent and a BYK-2012 dispersing agent according to a mass ratio of 13: 8;
the component B comprises the following components in percentage by mass: 60% of curing agent and 40% of propylene glycol methyl ether acetate; the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 5.
The preparation method of the ultra-fast drying water-based floating coat for repairing the automobile is similar to that of the example 3.
The difference from example 3 is that sodium alginate is not added to the aqueous dispersant.
Comparative example 5 ultra-fast drying aqueous basecoat for automotive repair
The ultra-fast-drying water-based intermediate coat for repairing the automobile comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 13 percent of aqueous hydroxyl polyacrylic acid dispersoid, 28 percent of aqueous polyurethane dispersoid, 19 percent of pigment, 18 percent of filler, 0.3 percent of functional additive, 1.5 percent of aqueous dispersant, 3 percent of polyurethane thickener and 17.2 percent of water; the pigment consists of titanium dioxide and carbon black in a mass ratio of 6: 1; the filler consists of kaolin and talcum powder according to the mass ratio of 3: 1; the functional auxiliary agent consists of polyvinyl alcohol and zinc acetate according to the mass ratio of 2: 9; the water-based dispersing agent consists of a BYK-190 dispersing agent, a BYK-2012 dispersing agent and sodium alginate according to a mass ratio of 13:8: 3;
the component B comprises the following components in percentage by mass: 60% of curing agent and 40% of propylene glycol methyl ether acetate; the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 1.
The preparation method of the ultra-fast drying water-based floating coat for repairing the automobile is similar to that of the example 3.
The difference from example 3 is that the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 1.
Comparative example 6 an ultra-fast drying waterborne basecoat for automotive refinishing
The ultra-fast-drying water-based primer surfacer for repairing the automobile comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 13 percent of aqueous hydroxyl polyacrylic acid dispersoid, 28 percent of aqueous polyurethane dispersoid, 19 percent of pigment, 18 percent of filler, 0.3 percent of functional additive, 1.5 percent of aqueous dispersant, 3 percent of polyurethane thickener and 17.2 percent of water; the pigment consists of titanium dioxide and carbon black in a mass ratio of 6: 1; the filler consists of kaolin and talcum powder according to the mass ratio of 3: 1; the functional auxiliary agent consists of polyvinyl alcohol and zinc acetate according to the mass ratio of 2: 9; the water-based dispersing agent consists of a BYK-190 dispersing agent, a BYK-2012 dispersing agent and sodium alginate according to a mass ratio of 13:8: 3;
the component B comprises the following components in percentage by mass: 60% of curing agent and 40% of propylene glycol methyl ether acetate; the curing agent is Desmodur N3390.
The preparation method of the ultra-fast drying water-based floating coat for repairing the automobile is similar to that of the embodiment 3.
The difference from example 3 is that the curing agent is Desmodur N3390.
Test example I adhesion test
1. Test materials: the ultra-fast-drying aqueous middle coats for repairing automobiles, prepared in examples 1 to 3 and comparative examples 2 to 6.
2. The test method comprises the following steps: the adhesion of the ultra-fast drying waterborne middle coat for automobile repair to a steel plate is tested according to the relevant standard of GB/T9286-1998 paint and varnish paint film marking test.
3. And (3) test results: the test results are shown in table 2.
Table 2: adhesion test results
As can be seen from Table 2, the ultra-fast drying waterborne intermediate coat for repairing the automobile, prepared by the invention, has stronger adhesive force to a steel plate, wherein the adhesive force of the embodiment 3 is strongest, and is the best embodiment of the invention. Compared with comparative examples 2 to 6, the ultra-fast-drying waterborne floating coat for repairing the automobile, which is prepared by the embodiment 3 of the invention, has stronger adhesive force.
Test example two, drying Performance test
1. Test materials: the ultra-fast-drying aqueous middle coating for repairing the automobile prepared in example 3 and comparative examples 1, 2, 5 and 6.
2. The test method comprises the following steps: the drying time of the ultra-fast drying aqueous middle coating for automobile repair is tested according to the relevant standard of HG/T5061-2016 automobile repair coating.
3. And (3) test results: the test results are shown in table 3.
Table 3: drying Performance test results
As can be seen from Table 3, the ultra-fast drying aqueous floating coat for repairing the automobile prepared by the invention has short drying time, can be polished after being dried for 90min at normal temperature (25 ℃), and can achieve the polishing effect after being heated for 20min at 50 ℃. The drying time of inventive example 3 was significantly shortened compared to comparative examples 1, 2, 5, 6. Therefore, the ultra-quick-drying waterborne floating coat for repairing the automobile, provided by the invention, can meet the use requirement of quick drying and can meet the use requirement of quick repair in the automobile repair industry.
Test example three, sanding property test
1. Test materials: the ultra-fast-drying aqueous middle coat for repairing the automobile prepared in example 3 and comparative example 2.
2. The test method comprises the following steps: the sanding property of the ultra-fast drying water-based primer for automobile repair prepared by the invention is tested according to the relevant standard of HG/T5061-2016 automobile repair paint.
3. And (3) test results: the test results are shown in table 4.
Table 4: sanding property test results
As can be seen from Table 4, the ultra-fast drying waterborne middle coat for repairing the automobile, prepared by the method, is easy to polish, does not stick abrasive paper completely, and has a uniform and smooth surface after polishing. The ultra-fast drying aqueous middle coat for repairing the automobile prepared in the comparative example 2 is not easy to polish, is adhered with sand paper, and has a non-smooth surface after polishing. Therefore, the ultra-fast-drying waterborne intermediate coat for repairing the automobile, which is prepared by the invention, has good polishing property.
Claims (5)
1. The ultra-fast-drying water-based primer surfacer for repairing the automobile is characterized by comprising a component A and a component B, wherein the component A comprises the following components in percentage by mass: 12-14% of aqueous hydroxyl polyacrylic acid dispersoid, 26-28% of aqueous polyurethane dispersoid, 17-20% of pigment, 16.8-20.6% of filler, 0.2-0.4% of functional additive, 1-2% of aqueous dispersant, 2-4% of polyurethane thickener and 11-25% of water;
the component B comprises the following components in percentage by mass: 50-70% of curing agent and 30-50% of propylene glycol methyl ether acetate;
the functional auxiliary agent consists of polyvinyl alcohol and zinc acetate according to the mass ratio of 1-3: 8-10;
the aqueous dispersant is a combination of a BYK-190 dispersant, a BYK-2012 dispersant and sodium alginate; the mass ratio of the BYK-190 dispersing agent to the BYK-2012 dispersing agent to the sodium alginate is 12-15:7-9: 2-4;
the curing agent consists of Bayhydur XP 2547 and Desmodur N3390 in a mass ratio of 1: 4-7.
2. The ultra-fast-drying aqueous middle coat for repairing an automobile according to claim 1, wherein the component A comprises the following components in percentage by mass: 13 percent of aqueous hydroxyl polyacrylic acid dispersoid, 28 percent of aqueous polyurethane dispersoid, 19 percent of pigment, 18 percent of filler, 0.3 percent of functional additive, 1.5 percent of aqueous dispersant, 3 percent of polyurethane thickener and 17.2 percent of water;
the component B comprises the following components in percentage by mass: 60% of curing agent and 40% of propylene glycol methyl ether acetate.
3. The ultra-fast-drying aqueous basecoat of claim 1 or 2 wherein said pigment is one or more of titanium dioxide, carbon black, aluminum tripolyphosphate, yellow iron oxide, red iron oxide, phthalocyanine blue, and phthalocyanine green.
4. The ultra-fast-drying aqueous basecoat for automotive refinishing of claim 1 or 2, wherein the filler is one or more of calcium carbonate, kaolin, talc, and precipitated barium sulfate.
5. The method for preparing an ultra-fast drying aqueous basecoat for automobile repair according to any one of claims 1 to 4 comprising separately preparing A, B components, wherein,
the preparation method of the component A comprises the following steps:
(1) sequentially adding the aqueous hydroxyl polyacrylic acid dispersoid, the aqueous polyurethane dispersoid, the water, the functional assistant and the aqueous dispersant according to the formula ratio, stirring at the speed of 200-400r/min, and stirring for 20-30 min;
(2) adding the pigment and the filler with the formula ratio into the step (1) in sequence, stirring at the speed of 500-800r/min, and stirring for 30-50 min;
(3) adding grinding zirconium beads into the step (2), grinding at the rotating speed of 1500r/min of 1200-;
the preparation method of the component B comprises the following steps:
adding propylene glycol methyl ether acetate and a curing agent under stirring at a rotating speed of 400r/min under the condition of vacuum pumping according to the formula amount of the component B, and stirring for 25-35min to obtain the component B.
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