CN111019491A - Water-based bottom material for wheel hub and preparation method thereof - Google Patents
Water-based bottom material for wheel hub and preparation method thereof Download PDFInfo
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- CN111019491A CN111019491A CN201911358495.4A CN201911358495A CN111019491A CN 111019491 A CN111019491 A CN 111019491A CN 201911358495 A CN201911358495 A CN 201911358495A CN 111019491 A CN111019491 A CN 111019491A
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention belongs to the technical field of water-based paint, and particularly relates to a water-based bottom material for a hub and a preparation method thereof. The water-based bottom layer material for the hub comprises the following components in parts by weight: aqueous polyester resin: 20-25 parts; aqueous amino resin: 7-8 parts; aqueous pigment slurry: 50-60 parts; filling: 5-10 parts; defoaming agent: 0.3-0.5 part; leveling agent: 0.1-0.5 part; salt spray resistant auxiliary agent: 0.5 part; anti-settling agent: 0.5 part; and a proper amount of deionized water. According to the water-based bottom material for the hub and the preparation method thereof, the water-based salt spray resistant auxiliary agent is added to form a good synergistic effect with the water-based polyester resin, so that the adhesive force of a paint film is obviously improved.
Description
Technical Field
The invention belongs to the technical field of water-based paint, and particularly relates to a water-based bottom material for a hub and a preparation method thereof.
Background
With the vigorous development of economy, people have rapidly increased the demand of automobiles, the automobiles become one of the most convenient transportation tools, and the market development potential is huge. At present, the national environmental protection agency has strict and harsh requirements on the construction of coating spraying enterprises, strictly controls VOC emission, and also has a trend of changing from solvent-based baking paint to water-based baking paint in the coating of automobile hubs.
For the water-based paint currently applied to the wheel hub, the following problems exist in the application process: when spraying, the paint film has the defect of insufficient adhesive force.
Disclosure of Invention
The invention aims to provide an aqueous base material for a hub and a preparation method thereof.
In order to solve the technical problems, the invention provides a water-based bottom material for a hub, which comprises the following components in parts by weight:
aqueous polyester resin: 20-25 parts;
aqueous amino resin: 7-8 parts;
aqueous pigment slurry: 50-60 parts;
filling: 5-10 parts;
defoaming agent: 0.3-0.5 part;
leveling agent: 0.1-0.5 part;
salt spray resistant auxiliary agent: 0.5 part;
anti-settling agent: 0.5 part; and
a suitable amount of deionized water.
Further, the aqueous pigment slurry comprises the following components in parts by weight:
water-based polyester: 20-25 parts;
aqueous dispersant: 0.5-1 part;
metal compound (b): 50-60 parts; and
and a proper amount of propylene glycol butyl ether.
Further, the solid content of the water-based polyester resin is 70%, the hydroxyl content of the water-based polyester resin is 1-2%, and the pH value of the water-based polyester resin is 8.0-9.0.
Further, the aqueous dispersant includes a modified polyacrylic acid polymer.
Further, the metal compound includes titanium dioxide.
Further, the filler includes: talc and barium sulfate.
Further, the defoamer comprises a modified polyether siloxane copolymer emulsion;
the leveling agent comprises an acrylate leveling agent;
the salt spray resistant auxiliary agent comprises a silane coupling agent;
the anti-settling agent comprises hydrophobic polyamide wax.
In another aspect, the present invention provides a method for preparing an aqueous base material for a hub, including:
stirring water-based polyester resin, water-based amino resin, water-based pigment slurry, a filler, a defoaming agent, a salt spray resistant auxiliary agent and a flatting agent for 10-30 min at the rotating speed of 600-800 r/min;
adding an anti-settling agent, and stirring and dispersing for 20-30 min at the rotating speed of 800-1000 r/min;
adding a proper amount of deionized water, adjusting the viscosity, and stirring for 20-25 min at the rotating speed of 800-1000 r/min.
The water-based base material for the wheel hub and the preparation method thereof have the beneficial effects that the water-based salt spray resistant auxiliary agent is added to form a good synergistic effect with the water-based polyester resin, so that the adhesive force of a paint film is obviously improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
In order to make the aforementioned and other objects, features and advantages of the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment 1 provides a water-based base material for a hub, which comprises the following components in parts by weight: aqueous polyester resin: 20-25 parts; aqueous amino resin: 7-8 parts; aqueous pigment slurry: 50-60 parts; filling: 5-10 parts; defoaming agent: 0.3-0.5 part; leveling agent: 0.1-0.5 part; salt spray resistant auxiliary agent: 0.5 part; anti-settling agent: 0.5 part; and a proper amount of deionized water. The water-based bottom material for the wheel hub has a good synergistic effect with water-based polyester resin by adding the water-based salt spray resistant auxiliary agent, so that the adhesive force of a paint film is obviously improved.
Optionally, the aqueous pigment slurry comprises the following components in parts by weight: water-based polyester: 20-25 parts; aqueous dispersant: 0.5-1 part; metal compound (b): 50-60 parts; and a proper amount of propylene glycol butyl ether. The water-based pigment slurry, the water-based polyester resin, the water-based amino resin and other additives are mutually dispersed, coated and wound, and the prepared paint film not only has high covering power and tinting strength, but also can form a compact protective layer on the surface of metal, and the compact protective layer covers the surface of the metal to play a role in protecting a matrix.
Optionally, the aqueous pigment slurry comprises the following components in parts by weight: water-based polyester: 25 parts of (1); aqueous dispersant: 1 part; metal compound (b): 60 parts; and a proper amount of propylene glycol butyl ether.
Optionally, the aqueous pigment slurry comprises the following components in parts by weight: water-based polyester: 20 parts of (1); aqueous dispersant: 0.5 part; metal compound (b): 50 parts of a mixture; and a proper amount of propylene glycol butyl ether.
Optionally, the aqueous pigment slurry comprises the following components in parts by weight: water-based polyester: 23 parts; aqueous dispersant: 0.8 part; metal compound (b): 55 parts of (1); and a proper amount of propylene glycol butyl ether.
In example 1, the aqueous polyester resin had a solid content of 70%, a hydroxyl group content of 1 to 2%, and a pH of 8.0 to 9.0. The water-based polyester resin has excellent mechanical property, water solubility, stability and weather resistance, and good compatibility with an auxiliary agent, and the water-based bottom layer material has good adhesion with a matched material and outstanding machining resistance.
Among them, too low hydroxyl group content of the aqueous polyester resin tends to result in insufficient crosslinking density, and too high hydroxyl group content tends to cause reaction and incomplete crosslinking.
Optionally, the aqueous dispersant comprises a modified polyacrylic acid polymer, and the aqueous pigment slurry can have uniform particle size distribution, good wettability and good color developability by adding the aqueous dispersant.
Optionally, the metal compound comprises titanium dioxide, and the colorizing property of the coating film is effectively improved by adding the titanium dioxide metal compound.
Optionally, the filler comprises: the talcum powder and the barium sulfate are added to effectively improve the covering and filling performance of the coating film on the defects of the substrate.
Optionally, the defoaming agent comprises modified polyether siloxane copolymer emulsion, and construction bubbles can be eliminated through the defoaming agent, so that the effect of improving the surface flatness is achieved.
Optionally, the leveling agent comprises an acrylate leveling agent, and the leveling agent can improve the surface flatness of a paint film and enhance the anti-fouling capability.
Optionally, the salt spray resistant auxiliary agent comprises a silane coupling agent, and salt spray resistance, water resistance and adhesive force of the paint film can be improved through the salt spray auxiliary agent.
Optionally, the anti-settling agent comprises hydrophobic polyamide wax, and the anti-settling agent can improve the stability of the coating and prevent the coating from settling.
The water base material for the hub in the embodiment 1 can also solve the following problems existing in the water base material for the hub:
(1) paint is easily hung on window spokes on the surface of the hub;
(2) the paint film covering power is low;
(3) poor chemical resistance;
(4) the resistance to machining is poor.
Example 2
On the basis of example 1, this example 2 provides a preparation method of an aqueous base material for a hub, which includes: stirring water-based polyester resin, water-based amino resin, water-based pigment slurry, a filler, a defoaming agent, a salt spray resistant auxiliary agent and a flatting agent for 10-30 min at the rotating speed of 600-800 r/min; adding an anti-settling agent, and stirring and dispersing for 20-30 min at the rotating speed of 800-1000 r/min; adding a proper amount of deionized water, adjusting the viscosity, and stirring for 20-25 min at the rotating speed of 800-1000 r/min.
For the component content and the specific implementation process of the aqueous base material, reference is made to the relevant discussion in example 1, and the detailed description is omitted here.
Example 3
Stirring 20 parts of water-based polyester resin, 7 parts of water-based amino resin, 50 parts of water-based pigment slurry, 5 parts of filler, 0.3 part of defoaming agent, 0.5 part of salt spray resistant auxiliary agent and 0.1 part of flatting agent for 30min at the rotating speed of 600 r/min; adding 0.5 part of anti-settling agent, and stirring and dispersing for 30min at the rotating speed of 800 r/min; adding a proper amount of deionized water, adjusting the viscosity, and stirring for 25min at the rotating speed of 800r/min to obtain the water-based bottom material for the hub.
Wherein the solid content of the water-based polyester resin is 70%, the hydroxyl content of the water-based polyester resin is 1%, and the pH value of the water-based polyester resin is 9.0.
Example 4
Stirring 25 parts of water-based polyester resin, 7 parts of water-based amino resin, 50 parts of water-based pigment slurry, 5 parts of filler, 0.3 part of defoaming agent, 0.5 part of salt spray resistant auxiliary agent and 0.1 part of flatting agent for 10min at the rotating speed of 800 r/min; adding 0.5 part of anti-settling agent, and stirring and dispersing for 20min at the rotating speed of 1000 r/min; adding a proper amount of deionized water, adjusting the viscosity, and stirring for 20min at the rotating speed of 1000r/min to obtain the water-based bottom material for the hub.
Wherein the solid content of the water-based polyester resin is 70%, the hydroxyl content of the water-based polyester resin is 2%, and the pH value of the water-based polyester resin is 9.0.
Example 5
Stirring 20 parts of water-based polyester resin, 8 parts of water-based amino resin, 50 parts of water-based pigment slurry, 5 parts of filler, 0.3 part of defoaming agent, 0.5 part of salt spray resistant auxiliary agent and 0.1 part of flatting agent for 20min at the rotating speed of 700 r/min; adding 0.5 part of anti-settling agent, and stirring and dispersing for 25min at the rotating speed of 900 r/min; adding a proper amount of deionized water, adjusting the viscosity, and stirring for 22min at the rotating speed of 900r/min to obtain the water-based bottom material for the hub.
Wherein the solid content of the water-based polyester resin is 70%, the hydroxyl content of the water-based polyester resin is 1.5%, and the pH value of the water-based polyester resin is 9.0.
Example 6
Stirring 25 parts of water-based polyester resin, 8 parts of water-based amino resin, 50 parts of water-based pigment slurry, 5 parts of filler, 0.3 part of defoaming agent, 0.5 part of salt spray resistant auxiliary agent and 0.1 part of flatting agent for 30min at the rotating speed of 600 r/min; adding 0.5 part of anti-settling agent, and stirring and dispersing for 20min at the rotating speed of 1000 r/min; adding a proper amount of deionized water, adjusting the viscosity, and stirring for 25min at the rotating speed of 800r/min to obtain the water-based bottom material for the hub.
Wherein the solid content of the water-based polyester resin is 70%, the hydroxyl content of the water-based polyester resin is 1%, and the pH value of the water-based polyester resin is 9.0.
Comparative example 1
Stirring 20 parts of water-based polyester resin, 7 parts of water-based amino resin, 50 parts of water-based pigment slurry, 5 parts of filler, 0.3 part of defoaming agent and 0.1 part of flatting agent for 30min at the rotating speed of 600 r/min; adding 0.5 part of anti-settling agent, and stirring and dispersing for 20min at the rotating speed of 1000 r/min; adding a proper amount of deionized water, adjusting the viscosity, and stirring for 25min at the rotating speed of 800r/min to obtain the water-based bottom material for the hub.
Wherein the solid content of the water-based polyester resin is 70%, the hydroxyl content of the water-based polyester resin is 1%, and the pH value of the water-based polyester resin is 9.0.
Comparative example 2
Stirring 25 parts of water-based polyester resin, 7 parts of water-based amino resin, 50 parts of water-based pigment slurry, 5 parts of filler, 0.3 part of defoaming agent and 0.1 part of flatting agent for 10min at the rotating speed of 800 r/min; adding 0.5 part of anti-settling agent, and stirring and dispersing for 30min at the rotating speed of 800 r/min; adding a proper amount of deionized water, adjusting the viscosity, and stirring for 20min at the rotating speed of 1000r/min to obtain the water-based bottom material for the hub.
Wherein the solid content of the water-based polyester resin is 70%, the hydroxyl content of the water-based polyester resin is 2%, and the pH value of the water-based polyester resin is 9.0.
Example 7
Table 1 lists the main components and contents of the aqueous base materials of examples 3-6 and comparative examples 1-2, and Table 2 lists the performance indexes of the aqueous base materials of examples 3-6 and comparative examples 1-2.
Specifically, the aluminum plate was degreased and polished in a size of 10cm by 5cm (thickness: 0.2mm), and then was dip-coated with the aqueous base materials prepared in examples 3 to 6 and comparative examples 1 to 2, respectively, and the test results are shown in Table 2.
TABLE 1 Main Components and amounts of Water-based primer materials
| Composition of raw materials | Example 3 | Example 4 | Example 5 | Example 6 | Comparative example 1 | Comparative example 2 |
| Water-based polyester resin | 20 | 25 | 20 | 25 | 20 | 25 |
| Aqueous amino resin | 7 | 7 | 8 | 8 | 7 | 7 |
| Aqueous pigment paste | 50 | 50 | 50 | 50 | 50 | 50 |
| Filler material | 5 | 5 | 5 | 5 | 5 | 5 |
| Defoaming agent | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Leveling agent | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Salt spray resistant auxiliary agent | 0.5 | 0.5 | 0.5 | 0.5 | / | / |
| Anti-settling agent | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Deionized water | Proper amount of | Proper amount of | Proper amount of | Proper amount of | Proper amount of | Proper amount of |
The unit of each component in table 1 is part by mass.
TABLE 2 various performance indexes of the aqueous base material
| Item | Example 3 | Example 4 | Example 5 | Example 6 | Comparative example 1 | Comparative example 2 |
| Fineness/um | 15 | 15 | 15 | 15 | 15 | 15 |
| Appearance of the product | Good effect | Good effect | Good effect | Good effect | Good effect | Good effect |
| Gloss/60 degree | 75 | 80 | 75 | 80 | 70 | 70 |
| Hardness of | H | H | H | H | HB | HB |
| Flexibility | Level 1 | Level 1 | Level 1 | Level 1 | Stage 2 | Stage 2 |
| Resistance to salt fog | 1000H | 1000H | 1000H | 1000H | 600H | 600H |
According to the test results in the table 2, the water-based base material for the wheel hub, which is prepared by the invention, has better performances of gloss, hardness, flexibility and salt spray resistance than those of the prior art, can be applied to different construction environments, and can completely meet the market demands. The reason is that the water-based bottom material for the wheel hub and the preparation method thereof have a good synergistic effect with the water-based polyester resin by adding the water-based salt spray resistant auxiliary agent, so that the acid resistance, the water resistance and the adhesive force of a paint film are obviously improved, and the service life of the product is prolonged; by the water-based pigment slurry containing the metal compound, the water-based bottom material not only has high covering power and tinting strength, but also can form a compact protective layer on the surface of the metal, and the compact protective layer covers the surface of the metal to play a role in protecting a substrate; the production process of the water-based bottom material for the hub is safe, environment-friendly and simple, the construction is more environment-friendly and convenient, water is used as a medium, and the water-based bottom material is safe and nontoxic and cannot cause harm to human bodies.
Example 8
Stirring 22 parts of water-based polyester resin, 7.5 parts of water-based amino resin, 60 parts of water-based pigment slurry, 10 parts of filler, 0.5 part of defoaming agent, 0.5 part of salt spray resistant auxiliary agent and 0.5 part of flatting agent for 30min at the rotating speed of 600 r/min; adding 0.5 part of anti-settling agent, and stirring and dispersing for 20min at the rotating speed of 1000 r/min; adding a proper amount of deionized water, adjusting the viscosity, and stirring for 25min at the rotating speed of 800r/min to obtain the water-based bottom material for the hub.
Wherein the solid content of the water-based polyester resin is 70%, the hydroxyl content of the water-based polyester resin is 1%, and the pH value of the water-based polyester resin is 9.0.
Example 9
Stirring 20 parts of water-based polyester resin, 7 parts of water-based amino resin, 55 parts of water-based pigment slurry, 8 parts of filler, 0.4 part of defoaming agent, 0.5 part of salt spray resistant auxiliary agent and 0.3 part of flatting agent for 30min at the rotating speed of 600 r/min; adding 0.5 part of anti-settling agent, and stirring and dispersing for 20min at the rotating speed of 1000 r/min; adding a proper amount of deionized water, adjusting the viscosity, and stirring for 25min at the rotating speed of 800r/min to obtain the water-based bottom material for the hub.
Wherein the solid content of the water-based polyester resin is 70%, the hydroxyl content of the water-based polyester resin is 2%, and the pH value of the water-based polyester resin is 8.0.
In conclusion, the water-based bottom material for the wheel hub and the preparation method thereof have the advantages that the water-based salt spray resistant auxiliary agent is added to form a good synergistic effect with the water-based polyester resin, so that the acid resistance, the water resistance and the adhesive force of a paint film are obviously improved, and the service life of a product is prolonged; by the water-based pigment slurry containing the metal compound, the water-based bottom material not only has high covering power and tinting strength, but also can form a compact protective layer on the surface of the metal, and the compact protective layer covers the surface of the metal to play a role in protecting a substrate; the production process of the water-based bottom material for the hub is safe, environment-friendly and simple, the construction is more environment-friendly and convenient, water is used as a medium, and the water-based bottom material is safe and nontoxic and cannot cause harm to human bodies.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The water-based base material for the wheel hub is characterized by comprising the following components in parts by weight:
aqueous polyester resin: 20-25 parts;
aqueous amino resin: 7-8 parts;
aqueous pigment slurry: 50-60 parts;
filling: 5-10 parts;
defoaming agent: 0.3-0.5 part;
leveling agent: 0.1-0.5 part;
salt spray resistant auxiliary agent: 0.5 part;
anti-settling agent: 0.5 part; and
a suitable amount of deionized water.
2. The aqueous base material for a wheel hub as claimed in claim 1, wherein,
the aqueous pigment slurry comprises the following components in parts by weight:
water-based polyester: 20-25 parts;
aqueous dispersant: 0.5-1 part;
metal compound (b): 50-60 parts; and
and a proper amount of propylene glycol butyl ether.
3. The aqueous base material for a wheel hub as claimed in claim 1, wherein,
the solid content of the water-based polyester resin is 70%, the hydroxyl content of the water-based polyester resin is 1-2%, and the pH value of the water-based polyester resin is 8.0-9.0.
4. The aqueous base material for a wheel hub as claimed in claim 2, wherein,
the aqueous dispersant includes a modified polyacrylic acid polymer.
5. The aqueous base material for a wheel hub as claimed in claim 2, wherein,
the metal compound includes titanium dioxide.
6. The aqueous base material for a wheel hub as claimed in claim 1, wherein,
the filler comprises: talc and barium sulfate.
7. The aqueous base material for a wheel hub as claimed in claim 1, wherein,
the defoamer comprises a modified polyether siloxane copolymer emulsion;
the leveling agent comprises an acrylate leveling agent;
the salt spray resistant auxiliary agent comprises a silane coupling agent;
the anti-settling agent comprises hydrophobic polyamide wax.
8. A method for preparing an aqueous base material for a hub, comprising:
stirring water-based polyester resin, water-based amino resin, water-based pigment slurry, a filler, a defoaming agent, a salt spray resistant auxiliary agent and a flatting agent for 10-30 min at the rotating speed of 600-800 r/min;
adding an anti-settling agent, and stirring and dispersing for 20-30 min at the rotating speed of 800-1000 r/min;
adding a proper amount of deionized water, adjusting the viscosity, and stirring for 20-25 min at the rotating speed of 800-1000 r/min.
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Application publication date: 20200417 |