CN116904098A - Water-based metallic flashing base paint and preparation method and application thereof - Google Patents
Water-based metallic flashing base paint and preparation method and application thereof Download PDFInfo
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- CN116904098A CN116904098A CN202311026689.0A CN202311026689A CN116904098A CN 116904098 A CN116904098 A CN 116904098A CN 202311026689 A CN202311026689 A CN 202311026689A CN 116904098 A CN116904098 A CN 116904098A
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- 239000003973 paint Substances 0.000 title claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 41
- 238000000576 coating method Methods 0.000 claims abstract description 73
- 239000011248 coating agent Substances 0.000 claims abstract description 70
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 53
- 229920006243 acrylic copolymer Polymers 0.000 claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 25
- 239000002904 solvent Substances 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000013530 defoamer Substances 0.000 claims abstract description 8
- 239000002270 dispersing agent Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 39
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 35
- 238000002156 mixing Methods 0.000 claims description 26
- 239000000049 pigment Substances 0.000 claims description 15
- 229920001577 copolymer Polymers 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 5
- 239000002987 primer (paints) Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229920001400 block copolymer Polymers 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 229920002301 cellulose acetate Polymers 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 12
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000005034 decoration Methods 0.000 abstract description 3
- 230000036541 health Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000002585 base Substances 0.000 description 66
- 238000003756 stirring Methods 0.000 description 38
- 230000000052 comparative effect Effects 0.000 description 19
- 239000006185 dispersion Substances 0.000 description 18
- 239000012046 mixed solvent Substances 0.000 description 18
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 11
- 229920002635 polyurethane Polymers 0.000 description 11
- 239000004814 polyurethane Substances 0.000 description 11
- 239000002002 slurry Substances 0.000 description 10
- 238000005507 spraying Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000001035 drying Methods 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 239000002966 varnish Substances 0.000 description 6
- 239000004925 Acrylic resin Substances 0.000 description 5
- 229920000178 Acrylic resin Polymers 0.000 description 5
- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical compound CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 description 4
- 230000004075 alteration Effects 0.000 description 4
- 239000002518 antifoaming agent Substances 0.000 description 4
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical group CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 4
- 229920002678 cellulose Polymers 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000012948 isocyanate Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 4
- 239000012855 volatile organic compound Substances 0.000 description 4
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 3
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical group CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 3
- -1 aliphatic isocyanate Chemical class 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 229920000058 polyacrylate Polymers 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 125000003636 chemical group Chemical group 0.000 description 2
- 239000004595 color masterbatch Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012972 dimethylethanolamine Substances 0.000 description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 2
- DQYBDCGIPTYXML-UHFFFAOYSA-N ethoxyethane;hydrate Chemical compound O.CCOCC DQYBDCGIPTYXML-UHFFFAOYSA-N 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000003137 locomotive effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000009974 thixotropic effect Effects 0.000 description 2
- 239000004971 Cross linker Substances 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 241001281643 Solus Species 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000009500 colour coating Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000013615 primer Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005406 washing Methods 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
- 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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0812—Aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a water-based metallic flashing base paint, a preparation method and application thereof, and relates to the technical field of paint; the coating comprises a component A and a component B; the component A comprises the following preparation raw materials in parts by weight: 30 to 40 parts of first aqueous acrylic copolymer secondary fraction, 25 to 35 parts of base stock, 8 to 12 parts of metal powder, 0.5 to 0.8 part of dispersing agent, 0.5 to 0.8 part of leveling agent, 0.2 to 0.5 part of defoamer, 0.0002 to 0.0004 part of drier and 15 to 20 parts of first solvent. The metal flashing base color paint provided by the invention has the advantages of capability of effectively reducing VOC emission in the construction process, reducing atmospheric pollution, health and environmental protection, prolonged service life of a coating film, improved surface hardness of the coating film, excellent adhesive force, exquisite and high-grade decoration, and wear resistance and scratch resistance.
Description
Technical Field
The invention belongs to the technical field of paint, and particularly relates to a water-based metallic flashing base paint, a preparation method and application thereof.
Background
With the high-speed development of urban rail vehicles and locomotive industries, new materials and new technologies are continuously emerging and updated, more and more high-quality products are gradually perceived by people, and popularization and application are obtained; in particular to the continuous increase and expansion of the domestic automobile industry in recent years and the rapid increase and demand of urban rail and subway construction, and provides a new development opportunity for the paint industry, in particular to decorative paint and functional paint. Among them, metallic sparkling paints are popular because they have a special metallic luster. At present, the use amount of the metallic flashing paint as the track traffic vehicle finish paint rises year by year, and the metallic flashing paint and the real paint are 1/2 of each other; however, metallic paint used for excellent decorative effect is difficult to be constructed in large area of urban rail vehicles and locomotives, and is easy to cause various objective problems such as bloom, chromatic aberration and the like.
The traditional polyurethane solid color paint has monotonous color, is green and cool, has no plain color paint added with metal powder, has softer paint surface hardness, and is easy to peel off when a high-speed vehicle is hit by flying stones bounced by a road surface. In addition, the vehicle of plain paint can not be directly wiped by dry cloth or wet cloth when being cleaned, and a large amount of clear water is absolutely required to be used for washing off dust attached to the surface of the vehicle paint, so that the hard gray sand can not scratch the vehicle paint when the rag contacts a vehicle body, and the substrate is particularly obvious once the substrate is defective.
In the related art, the water-based metal flashing paint has a plurality of types, and most of the water-based amino baking paint and the 1K water-based acrylic polyurethane metal flashing base paint which are formed by taking main resin as water-based polyester emulsion, water-based acrylic emulsion and amino resin are mainly used in the low-end market, and the 2K water-based acrylic polyurethane metal flashing base paint is just started in the field of rail transit, so that a plurality of construction problems need to be overcome, and as metal powder is unstable in water and air and is often subject to chemical reaction to deteriorate, the surface of the metal powder needs to be specially treated, so that the metal powder used in the water-based paint is expensive, and the use of the metal powder is limited.
Disclosure of Invention
The present invention is directed to an aqueous metallic sparkling base paint which addresses at least one of the problems and deficiencies set forth in the background art discussed above.
The invention also provides a preparation method of the water-based metallic sparkling ground color coating.
The invention also provides application of the water-based metallic sparkling ground paint.
The first aspect of the invention discloses a water-based metallic sparkling primer coating, which comprises a component A and a component B;
the component A comprises the following preparation raw materials in parts by weight:
30 to 40 parts of first aqueous acrylic copolymer secondary fraction, 25 to 35 parts of base stock, 8 to 12 parts of metal powder, 0.5 to 0.8 part of dispersing agent, 0.5 to 0.8 part of leveling agent, 0.2 to 0.5 part of defoamer, 0.0002 to 0.0004 part of drier and 15 to 20 parts of first solvent;
the base material comprises the following preparation raw materials in parts by weight:
18 to 20 parts of second aqueous acrylic copolymer secondary fraction, 3 to 5 parts of anti-settling agent, 20 to 25 parts of alignment agent, 18 to 25 parts of second solvent and 0.1 to 0.15 part of pH regulator.
According to one of the technical schemes of the coating, the coating at least has the following beneficial effects:
the 2K aqueous acrylic polyurethane metallic flashing base color paint for the interior and exterior trim of the rail transit vehicle has the characteristics of capability of effectively reducing VOC emission, reducing atmospheric pollution, health and environmental protection, prolonging the service life of a coating film, improving the surface hardness of the coating film, excellent adhesive force, exquisite and high-grade decoration, wear resistance and scratch resistance.
The 2K aqueous acrylic polyurethane metallic flashing base paint adopts a first aqueous acrylic copolymer secondary dispersion, metal powder and base materials, and optimizes the formula to obtain the 2K aqueous acrylic polyurethane metallic flashing base paint for the interior and exterior trim of the rail transit vehicle. The coating formed by the coating has long service life and low maintenance cost in the later period.
By controlling the directional ordered arrangement of the metal pigments and adopting double-coating spraying construction, a large area is realized. The whole car coating solves the problems of coating bloom and excessive chromatic aberration caused by long train body and large construction area of the rail transit train.
According to some embodiments of the invention, the component B comprises the following preparation raw materials in parts by weight:
65-100 parts of cross-linking agent and 0-35 parts of third solvent.
According to some embodiments of the invention, the first aqueous acrylic copolymer secondary fraction has a hydroxyl content of 3.5% to 3.9%.
According to some embodiments of the invention, the first aqueous acrylic copolymer secondary fraction has a viscosity of 500 mPa-s to 4500 mPa-s.
According to some embodiments of the invention, the first aqueous acrylic copolymer secondary fraction has a solids content of 44% to 46%.
According to some embodiments of the invention, the first aqueous acrylic copolymer secondary fraction is at least one of BayhydrolA2470 and AQUAPAC-8240.
According to some embodiments of the invention, the mass ratio of BayhydrolA2470 to AQUAPAC-8240 in the first aqueous acrylic copolymer secondary fraction is 1:1.9-2.1.
According to some embodiments of the invention, the second aqueous acrylic copolymer secondary fraction is at least one of BayhydrolA2470 and AQUAPAC-8240.
According to some embodiments of the invention, the mass ratio of BayhydrolA2470 to AQUAPAC-8240 in the second aqueous acrylic copolymer secondary fraction is 1:1.9-2.1.
According to some embodiments of the invention, the metal powder comprises at least one of aluminum powder or copper powder.
According to some embodiments of the invention, the anti-settling agent is a sheet silicate.
According to some embodiments of the invention, the alignment agent is a modified butyl acetate cellulose and a linear wax copolymer emulsion.
According to some embodiments of the invention, the dispersant is a high molecular weight block copolymer containing pigment affinic groups.
According to some embodiments of the invention, the defoamer is a hydrophobic defoamer that does not contain silicone.
According to some embodiments of the invention, the crosslinker is HDI isocyanate.
According to some embodiments of the invention, the mass ratio of the A component to the B component is 100:10-20.
According to some embodiments of the invention, the base stock further comprises 30-35 parts of water.
According to some embodiments of the invention, the metal powder is subjected to a modification treatment.
According to some embodiments of the invention, the modifying treatment is a surface wrapping or passivating treatment.
According to some embodiments of the invention, the preparation raw material of the component a further comprises color paste.
According to some embodiments of the invention, the leveling agent is an ionic polyacrylate solution.
According to some embodiments of the invention, the drier is an organic amine drier.
According to some embodiments of the invention, the first solvent comprises ethylene glycol butyl ether acetate and propylene glycol methyl ether acetate.
According to some embodiments of the invention, the mass fraction of ethylene glycol butyl ether acetate in the first solvent is 65% -70%.
According to some embodiments of the invention, the mass fraction of propylene glycol methyl ether acetate in the first solvent is 30% -35%.
According to some embodiments of the invention, the second solvent comprises water and ethylene glycol butyl ether.
According to some embodiments of the invention, the mass fraction of water in the second solvent is 18% to 20%.
According to some embodiments of the invention, the mass fraction of ethylene glycol butyl ether in the second solvent is 80% -82%.
According to some embodiments of the invention, the pH adjuster is dimethylethanolamine.
The invention also discloses a preparation method of the water-based metallic sparkling base paint, which comprises the following steps:
mixing the A component and the B component.
According to some embodiments of the invention, the method of preparing the base material comprises the steps of:
s1, mixing an anti-settling agent and water to prepare a first mixture;
s2, mixing part of the alignment agent and part of the second solvent to prepare a second mixture;
s3, mixing the second aqueous acrylic copolymer secondary fraction, the pH regulator, the first mixture, the second mixture, the residual alignment agent and the residual second solvent.
According to some embodiments of the invention, the method of preparing the base material comprises the steps of:
s01, heating water to 50-60 ℃, and adding an anti-settling agent under the stirring state of 400-500 r/min to prepare a first mixture;
s02, uniformly mixing 18-20 parts of a second solvent and 8-10 parts of an alignment agent in a stirring state of 400-500 r/min to prepare a second mixture;
s03, mixing the second aqueous acrylic copolymer secondary fraction with a pH regulator under the stirring state of 400-500 r/min to enable the pH value to be 9-11; preparing a third mixture;
mixing the first mixture, the second mixture and the third mixture for 30-50 min under the stirring state of 1200-1300 rmin, adding 2-3 parts of the second solvent, adding the rest of the alignment agent, mixing under the stirring state of 400-500 r/min, and slowly dripping for 15-20 min.
According to some embodiments of the invention, the method of preparing further comprises preparing the pre-dispersion slurry.
According to some embodiments of the invention, the method for preparing a pre-dispersion slurry comprises the steps of:
s001, mixing aluminum powder, a dispersing agent and a first solvent to prepare first dispersion slurry;
s002, mixing the first aqueous acrylic copolymer secondary fraction, a leveling agent, a defoaming agent, a base material and a drier to prepare second dispersion slurry;
s003, mixing the first dispersion slurry and the second dispersion slurry.
According to some embodiments of the invention, the stirring speed of the mixing in step S001 is 400r/min to 500r/min.
According to some embodiments of the invention, the mixing time in step S001 is 40min to 50min.
According to some embodiments of the invention, the stirring speed of the mixing in step S002 is 400r/min to 1200r/min.
According to some embodiments of the invention, the mixing time in step S002 is 100min to 200min.
According to some embodiments of the invention, the stirring speed of the mixing in step S002 is 500r/min to 700r/min.
According to some embodiments of the invention, the mixing time in step S002 is 10min to 20min.
According to some embodiments of the invention, the color difference ΔE of the A component is less than or equal to 2.0 (BYK/electro-guide/45/0 model color difference meter).
According to some embodiments of the invention, the viscosity of the a-component is 80s to 100s (coating-4 # cup).
The invention in a third aspect discloses application of the aqueous metallic sparkling base paint in preparation of rail transit vehicles.
According to some embodiments of the invention, the rail transit vehicle comprises a urban rail or a motor car.
Detailed Description
The conception and the technical effects produced by the present invention will be clearly and completely described in conjunction with the embodiments below to fully understand the objects, features and effects of the present invention. It is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present invention based on the embodiments of the present invention.
In the description of the present invention, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The basic conditions of the raw material components in the embodiment of the invention are as follows:
aqueous acrylic copolymer secondary fraction:
bayhydrola2470 of Kogyo resin Co., ltd., china, 45% solids, 3.9% solids hydroxyl content, and viscosity 1500 mPas-3000 mPas.
AQUAPAC-8240, available from Jiangsu Fuqisen resin Co., ltd., contains 44% -46% of solid, 3.9% of hydroxyl, and has a viscosity of 500 mPas to 4500 mPas.
Anti-settling agent: synthetic silicate flakes, insoluble in water but capable of hydro-swelling in water to form a colorless transparent colloid; the following examples are LaponiteRD from Pick chemical, germany.
The arrangement agent comprises the following components: the mixture of the modified butyl cellulose acetate and the modified wax copolymer emulsion has the mixing ratio in the range of 50:50-50:100, so that the orientation of the metal foil is effectively controlled;
the modified butyl acetate cellulose in the following example is Solus from Issmann chemical Co., USA TM 3050 modified wax copolymer emulsion is U.SLu Borun ViscalexHV30 from Shanghai chemical Co., ltd.
pH regulator: n, N-dimethylethanolamine, abbreviated as: DMEA, a colorless, transparent liquid, neutralizes free acids on the molecular chain of the aqueous acrylic resin to form salts, thereby increasing the water solubility of the resin, which is exemplified by eastman chemical company, usa.
Dispersing agent: a high molecular weight block copolymer containing pigment affinic groups or an aqueous solution of a copolymer containing high efficiency pigment adsorbing groups.
The high molecular weight block copolymer containing pigment affinities is selected from the group consisting of DISPRBYK-190, pick chemical company, germany.
The aqueous solution of the high-efficiency pigment adsorbing group-containing copolymer is selected from the group consisting of the winning chemical company of Germany,Dispers750W。
leveling agent: an ionic polyacrylate solution or a solvent-free organomodified siloxane.
The ionic polyacrylate solution was selected from the group consisting of BYK-381, pick chemical Co.
The solvent-free organomodified siloxane is selected from the group consisting of the German Basoff chemical group, EFKA-3580.
Defoaming agent: hydrophobic defoamers or emulsified metal polymers that do not contain silicones.
The hydrophobic defoamer which does not contain silicone is selected from BYK-011, of Pick chemical company of Germany.
The emulsified metal polymer is selected from the group consisting of the German Basoff chemical group, EFKA-2526.
Aluminum powder (copper powder): coated aluminum paste selected from German AikaHP Z1105IL, solids content: 60%, particle size: 12-28 μm.
Color master batch: selected from the group consisting of high-intensity color aqueous color master batch, colanil Black N131, colanil Red FG, colanyl Yellow Oxide, colanyl Blue Oxide, from Germany (Colanil).
Drier: polyamine compounds; selected from the american gas chemistry company, T300.
The mixed solvent A is colorless liquid formed by mixing water and ethylene glycol butyl ether according to the proportion of 80:20.
The mixed solvent B is colorless liquid formed by mixing ethylene glycol butyl ether acetate and propylene glycol methyl ether acetate according to a ratio of 7:3.
The crosslinking agent of the auxiliary polymerization coating is HDI; is selected from Bayer, desmodur N3900, 100% solids, NCO value 23.5%, viscosity 650 mPa.s-850 mPa.s or Wanhua chemical companyHT-500, the solid content is 100%, the NCO value is 23.5% + -1%, the viscosity is 400 mPas-1000 mPas.
The main action mechanism of the invention is as follows: isocyanate groups on aliphatic isocyanate react with hydroxyl groups on the low-hydroxyl-value aqueous acrylic copolymer secondary dispersion resin to generate carbamate, and finally the carbamate reacts into a high-molecular three-dimensional network structure to form a film. Finally, the coating film is endowed with good mechanical, weather-proof and chemical resistance and excellent appearance.
Because of the arrangement problem of the flaky structure of the aluminum powder in the paint, if the aluminum powder is not well controlled, the color can not meet the requirement, the aluminum powder is difficult to construct and easy to flower, and finally the decorative effect can be influenced.
There are two simple forms of aluminum powder alignment, namely random alignment and parallel alignment. Wherein, the disordered arrangement is that aluminum powder sheet structures are uniformly arranged in all directions; the parallel arrangement is that aluminum powder lamellar structures are all arranged in parallel with the orientation of the paint film surface. The appearance of the paint is obviously different from that of parallel arrangement, and the aluminum powder is unevenly arranged, namely, aluminum powder in different areas of a paint film is differently arranged, so that the whole color is black, white or cloud-like.
The aluminum powder is easy to be arranged in disorder under the following conditions:
(1) The paint film is thicker, in particular to a thicker single-pass spray paint film;
(2) The surface dryness of the paint film is slower;
(3) The paint components have poor compatibility, in particular resin has poor compatibility;
(4) The paint has stronger thixotropic property in a spraying state or higher viscosity in spraying;
(5) The paint contains large-size particles such as flatting agent, filler and the like. The larger the particles, the more the aluminum powder tends to be randomly arranged; on the contrary, the alignment tends to be parallel. If filler is added into aluminum paint, when the dispersion fineness is large, the silver powder is arranged in disorder, and the arrangement tends to be parallel along with the reduction of the fineness. The dispersion degree of the anti-settling agent and the aluminum powder arrangement auxiliary agent also affects the aluminum powder arrangement;
(6) After the silver powder is blacked due to factors such as acid, alkali and storage in the paint, the aluminum powder tends to be disordered in arrangement.
The parallel arrangement of the aluminum powder is easy to occur under the following conditions of controlling the parallel arrangement of the aluminum powder, and the directional parallel arrangement of the aluminum powder can be controlled according to the conditions:
(1) The paint film is thin, and particularly, the single-pass spray dry film is thin and easy to arrange equally;
(2) The surface of the paint film is quick to dry;
(3) The paint components have good compatibility and good fluidity;
(4) The paint has certain thixotropic property in a spraying state, but cannot be too strong;
(5) The insoluble particles, such as anti-settling agents, contained in the system should be sufficiently finely dispersed.
The main coating raw materials comprise low-hydroxyl-value water-based acrylic copolymer secondary fraction, metallic pigment (copper powder or aluminum powder), base material (water-based aluminum powder orienting agent), auxiliary agent and mixed solvent.
The low-hydroxyl-value water-based acrylic copolymer secondary-fraction resin in the main coating has the characteristics of quick drying, good water release, contribution to controlling the arrangement and orientation of metal pigments due to the base material (water-based aluminum powder orientation agent) and the like; the metallic pigment is used as a coloring pigment; the drier, the leveling agent and the aluminum powder orientation agent are all organic modified auxiliary agents, namely the drier adopts an organotin drier and liquid. The leveling agent is an organosilicon leveling agent and liquid. Aluminum powder orientation agent and pasty liquid.
The auxiliary coating raw materials comprise HDI aliphatic isocyanate and a mixed solvent B; wherein: HDI aliphatic isocyanates are colorless transparent liquids. The mixed solvent is colorless liquid formed by mixing ethylene glycol butyl ether acetate and propylene glycol methyl ether acetate according to a mass ratio of 7:3.
The main technical indexes of the paint are shown in table 1.
Table 1: technical index
The preparation method of the composite coating in the embodiment of the invention comprises the following steps:
according to the specification of GB/T1727, the test board is polished by sand paper, and is coated after cleaning treatment, the dry film thickness of the water-based metallic sparkling primer paint film is (18+/-3) mu m, the varnish (50+/-5) mu m, and the water-based metallic sparkling primer and water-based varnish matching system (70+/-5) mu m.
The preparation method of the base paint and varnish coating test plate comprises the following steps:
a) Routine performance testing:
after finishing one-time coating by adopting a wet-on-wet method and surface drying, drying for 2 hours at the temperature of (60+/-2), and then carrying out coating performance test after regulating the state for 16 hours at the standard environmental conditions of the temperature of (23+/-2) ℃ and the humidity of (50+/-5) RH;
b) Pattern detection:
after the coating test board is coated, carrying out state adjustment for 7d under the standard environmental conditions of temperature (23+/-2) DEG C and humidity (50+/-5) percent RH, and then carrying out coating performance test;
preparation of a base paint and varnish matched coating test plate:
firstly, coating a base color paint, standing for 16 hours, and then coating a varnish; 2 hours after finishing the varnish spraying; drying for 2 hours at the temperature of (60+/-2) DEG C, taking out and placing for 7d, and then testing the performance of the coating.
Example 1
This example is a waterborne metallic sparkling base coating consisting of the components shown in table 2.
TABLE 2 mass percent of the components in the aqueous metallic sparkling base coating of this example
TABLE 3 raw material composition of the base Material in this example
The preparation method of the base material in the embodiment comprises the following steps:
s1, firstly, taking water into a 60L interlayer heatable drawing cylinder to be heated to 60 ℃, adding an anti-settling agent under the stirring state (400 r/min), and continuously stirring until the mixture is discharged in a transparent colloid shape to prepare a first mixture;
s2, taking 18 parts of mixed solvent A to 50L, pulling the mixed solvent A to a cylinder, adding a modified butyl acetate cellulose arraying agent in a stirring state (400 r/min), and continuously stirring until the mixed solvent A is completely dissolved and discharged to prepare a second mixture;
s3, taking the water-borne acrylic copolymer secondary dispersion into a 100L pull cylinder, dropwise adding part of pH regulator in a stirring state (400 r/min) to enable the pH value to be 9-11, and after the pH value is stable; sequentially adding the first mixture and the second mixture into the mixture, stirring at a high speed (1200 r/min) for 40min, adding 2 parts of mixed solvent A, dropwise adding the rest of pH regulator in a stirring state, enabling the pH value to be 9-11, standing for 30min, adding the modified wax copolymer emulsion alignment agent in the stirring state (400 r/min), continuously stirring for 15min, and discharging to finish the preparation of the base material (the aqueous aluminum powder alignment agent).
The preparation method of the main body coating in the embodiment comprises the following steps:
s1, taking aluminum powder into a 20L drawing cylinder, dropwise adding a dispersing agent into 18 parts of mixed solvent A, uniformly stirring, pouring into the 20L drawing cylinder with the aluminum powder taken, soaking for more than 2 hours, entering a stirrer, and stirring at a low speed (400 r/min) for 45min to obtain first dispersion slurry.
S2, respectively taking a leveling agent and a defoaming agent from a 150L drawing cylinder, sequentially dripping the leveling agent and the defoaming agent into the water-based acrylic copolymer secondary dispersion drawing cylinder in a low-speed (400 r/min) stirring state, stirring for 30min at a low speed (400 r/min), adding the base material into the water-based acrylic copolymer drawing cylinder, stirring for 50min at a high speed (1200 r/min), adding the mixed solvent A and the drier, and dripping the pH regulator in the stirring state to enable the pH value to be 9-11, and standing for 30min to obtain second dispersion slurry.
S3, adding the second dispersion slurry into the second dispersion slurry under the stirring state (400 r/min), and stirring the mixture for 10min at a medium speed (800 r/min) after the addition is finished, thus obtaining the main coating.
The preparation method of the curing agent in the embodiment comprises the following steps: and mixing the cross-linking agent with the mixed solvent to prepare the curing agent.
The weight ratio of the main coating to the curing agent is 100:20.
When in use, the main coating and the curing agent are mixed according to the following weight ratio of 100:20, and the two components are uniformly mixed to obtain the 2K aqueous acrylic polyurethane metallic sparkling base coating.
During construction, proper deionized water is added to adjust the viscosity to a proper value (coating a No. 4 cup, 18 s-22 s).
Example 2
This example is a waterborne metallic sparkling base coating consisting of the components shown in table 4.
TABLE 4 weight percent of the components in the aqueous metallic sparkling base coating of this example
TABLE 5 raw material composition of the base Material in this example
The preparation method of the coating material and the preparation method of the base material in this example were carried out with reference to example 1.
Example 3
This example is a waterborne metallic sparkling base coat, consisting of the components in table 6.
TABLE 6 mass percent of the components in the aqueous metallic sparkling base coating of this example
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TABLE 7 raw material composition of the base Material in this example
The preparation method of the coating material and the preparation method of the base material in this example were carried out with reference to example 1.
Example 4
This example is a waterborne metallic sparkling base coat, consisting of the components in table 8.
TABLE 8 mass percent of the components in the aqueous metallic sparkling base coating of this example
TABLE 9 raw material composition of the base Material in this example
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The preparation method of the coating material and the preparation method of the base material in this example were carried out with reference to example 1.
Example 5
This example is a waterborne metallic sparkling base coat, consisting of the components in table 10.
TABLE 10 mass percent of the components in the aqueous metallic sparkling base coating of this example
TABLE 11 raw material composition of the base Material in this example
The preparation method of the coating material and the preparation method of the base material in this example were carried out with reference to example 1.
Comparative example 1
This comparative example is an aqueous metallic sparkling base coating consisting of the components shown in table 12.
Table 12 mass percent of components in the aqueous metallic sparkling base coating of this comparative example
TABLE 13 raw material composition of base materials in this comparative example
The preparation method of the base material in the comparative example comprises the following steps:
adding the water-borne acrylic copolymer secondary fraction into a 100L pull cylinder, dropwise adding part of pH regulator in a stirring state (400 r/min) to enable the pH value to be 9-11, and after the pH value is stable; sequentially adding water and 18 parts of mixed solvent A into the mixture, stirring the mixture at a high speed (1200 r/min) for 40min, adding 2 parts of mixed solvent A, dropwise adding the rest part of pH regulator in a stirring state, enabling the pH value to be 9-11, standing the mixture for 30min, adding the modified wax copolymer emulsion alignment agent, continuously stirring the mixture for 15min, and discharging the mixture to finish the preparation of the base material (the aqueous aluminum powder alignment agent).
The preparation method of the main body paint in this comparative example was performed as in example 1.
Comparative example 2
This comparative example is an aqueous metallic sparkling base coating consisting of the components shown in table 14.
Table 14 the mass percent of the components in the aqueous metallic sparkling base coating of this comparative example
/>
TABLE 15 raw material composition of base Material in this comparative example
The preparation method of the base material in the comparative example comprises the following steps:
adding the water-borne acrylic copolymer secondary fraction into a 100L pull cylinder, dropwise adding part of pH regulator in a stirring state (400 r/min) to enable the pH value to be 9-11, and after the pH value is stable; sequentially adding water and 18 parts of mixed solvent A into the mixture, stirring the mixture at a high speed (1200 r/min) for 40min, adding 2 parts of mixed solvent A, dropwise adding the rest part of pH regulator in a stirring state, enabling the pH value to be 9-11, standing the mixture for 30min, adding the modified butyl acetate cellulose alignment agent, continuously stirring the mixture for 15min, and discharging the mixture to finish the preparation of the base material (the aqueous aluminum powder alignment agent).
The preparation method of the main body paint in this comparative example was performed as in example 1.
Comparative example 3
This comparative example is an aqueous metallic sparkling base coating consisting of the components shown in table 16.
Table 16 the mass percent of the components in the aqueous metallic sparkling base coating of this comparative example
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TABLE 17 raw material composition of the base Material in this comparative example
The preparation method of the base material in the comparative example comprises the following steps:
s1, firstly, taking water into a 60L interlayer heatable drawing cylinder to be heated to 60 ℃, adding an anti-settling agent under the stirring state (400 r/min), and continuously stirring until the mixture is discharged in a transparent colloid shape to prepare a first mixture;
s2, taking the water-borne acrylic copolymer secondary dispersion into a 100L pull cylinder, dropwise adding part of pH regulator in a stirring state (400 r/min) to enable the pH value to be 9-11, and after the pH value is stable; sequentially adding the first mixture and 18 parts of the mixed solvent A into the mixture, stirring the mixture at a high speed (1200 r/min) for 40min, adding 2 parts of the mixed solvent A, dropwise adding the rest part of the pH regulator in a stirring state, enabling the pH value to be 9-11, standing the mixture for 30min, and discharging the mixture to finish the preparation of the base material (the aqueous aluminum powder directing agent).
The preparation method of the main body paint in this comparative example was performed as in example 1.
The results of the performance tests of the coatings prepared in examples 1 to 5 and comparative examples 1 to 3 of the present invention are shown in tables 18 to 20.
TABLE 18 Effect of different low hydroxyl waterborne acrylic resins on coating bloom
From the above table, the Bayhydrola2470 low-hydroxyl acrylic resin has excessively fast surface drying, and aluminum powder is easy to accumulate, so that the spray coating is not suitable for large-area spraying such as rail transit; the AQUAPAC-8240 low hydroxyl acrylic resin is excessively slow in surface drying and easy to sag to cause aluminum powder to appear cloud-like and bloom, so that the optimal scheme suitable for large-area spraying and non-bloom of rail traffic and the like is achieved by compounding the low hydroxyl acrylic resin BayhydrolA2470 and the AQUAPAC-8240 according to different proportions, and the test result shows that when the weight ratio of the two is m (2470): the construction effect is best when m (8240) =2:1.
TABLE 19 Effect of different alignment agents on coating bloom
TABLE 20 influence of different curing Agents on the chemical resistance and weather resistance of coatings
In the invention, in order to ensure the appearance and performance requirements, the 2K aqueous acrylic polyurethane metallic sparkling base paint must be selected from resins which contain high metallic pigment, are quick to dry, have low viscosity, have good weather resistance and the like. The base material, the transparent pigment and the auxiliary coating cross-linking agent are matched, so that the high quality and high stability of the product are ensured, the construction is convenient, the directional ordered arrangement of the metal pigments is controlled, the double-coating manual operation is adopted, and the construction area is 72m on one side 2 And (3) spraying once, wherein the color difference range delta E is controlled within 1.5. The coating of the large-area whole car is realized, and the problems of coating bloom and excessive chromatic aberration caused by long car body and large construction area of the urban rail motor car are solved.
The whole appearance fullness of the dried coating is good, the hand feeling is good, the gloss of the metal flashing coating after finishing is 93.5%, the adhesive force (cross-cut) reaches 0 level, the coating performance is good, and the requirements are completely met. Meanwhile, the emission of VOC (volatile organic compounds) in the coating process is reduced, and the atmospheric pollution is reduced.
In conclusion, the 2K aqueous acrylic polyurethane metal flashing base paint for the interior and exterior trim of the rail transit vehicle has the characteristics of capability of effectively reducing VOC emission, reducing atmospheric pollution, protecting health and protecting environment, prolonging the service life of a coating film, improving the surface hardness of the coating film, excellent adhesive force, exquisite and high-grade decoration, wear resistance and scratch resistance. The 2K aqueous acrylic polyurethane metallic flashing base paint adopts a first aqueous acrylic copolymer secondary dispersion, metal powder and base materials, and optimizes the formula to obtain the 2K aqueous acrylic polyurethane metallic flashing base paint for the interior and exterior trim of the rail transit vehicle. The coating formed by the coating has long service life and low maintenance cost in the later period. The invention realizes large area by controlling the directional ordered arrangement of the metal pigments and adopting double-coating spraying construction. The whole car coating solves the problems of coating bloom and excessive chromatic aberration caused by long train body and large construction area of the rail transit train.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (10)
1. The water-based metallic sparkling primer is characterized by comprising a component A and a component B;
the component A comprises the following preparation raw materials in parts by weight:
30 to 40 parts of first aqueous acrylic copolymer secondary fraction, 25 to 35 parts of base stock, 8 to 12 parts of metal powder, 0.5 to 0.8 part of dispersing agent, 0.5 to 0.8 part of leveling agent, 0.2 to 0.5 part of defoamer, 0.0002 to 0.0004 part of drier and 15 to 20 parts of first solvent;
the base material comprises the following preparation raw materials in parts by weight:
18 to 20 parts of second aqueous acrylic copolymer secondary fraction, 3 to 5 parts of anti-settling agent, 20 to 25 parts of alignment agent, 18 to 25 parts of second solvent and 0.1 to 0.15 part of pH regulator.
2. The aqueous metallic sparkling primer coating of claim 1, wherein the B component comprises the following preparation raw materials in parts by weight:
65-100 parts of cross-linking agent and 0-35 parts of third solvent.
3. The aqueous metallic sparkling base paint of claim 1, wherein the metallic powder comprises at least one of aluminum powder or copper powder.
4. The aqueous metallic sparkling base paint of claim 1, wherein said anti-settling agent is a sheet silicate.
5. The aqueous metallic sparkling base coating of claim 1, wherein the alignment agent is a modified butyl cellulose acetate and a linear wax copolymer emulsion.
6. The aqueous metallic sparkling base coating of claim 1, wherein the dispersant is a high molecular weight block copolymer comprising pigment affinic groups.
7. The aqueous metallic sparkling base coating of claim 1, wherein said defoamer is a hydrophobic defoamer that is free of silicone.
8. A method of preparing the aqueous metallic sparkling base coating of any of claims 1 to 7, comprising the steps of:
mixing the A component and the B component.
9. The method according to claim 8, characterized in that the preparation method of the base material comprises the following steps:
s1, mixing an anti-settling agent and water to prepare a first mixture;
s2, mixing part of the alignment agent and part of the second solvent to prepare a second mixture;
s3, mixing the second aqueous acrylic copolymer secondary fraction, the pH regulator, the first mixture, the second mixture, the residual alignment agent and the residual second solvent.
10. Use of the aqueous metallic sparkling base paint of any of claims 1 to 7 in the preparation of rail transit vehicles.
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