CN110588240A - Automobile hub coating film - Google Patents
Automobile hub coating film Download PDFInfo
- Publication number
- CN110588240A CN110588240A CN201910798332.1A CN201910798332A CN110588240A CN 110588240 A CN110588240 A CN 110588240A CN 201910798332 A CN201910798332 A CN 201910798332A CN 110588240 A CN110588240 A CN 110588240A
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- CN
- China
- Prior art keywords
- coating
- powder
- epoxy resin
- automobile hub
- coating film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B7/00—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins
- B60B7/0026—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface
- B60B7/0033—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface the dominant aspect being the surface appearance
- B60B7/0046—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface the dominant aspect being the surface appearance the surface being plated or coated
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses an automobile hub coating film which comprises a hub body, wherein a primer layer, an intermediate coating and a finish coating are sequentially arranged on the surface of the hub body from inside to outside, the primer layer, the intermediate coating and the finish coating are all formed by powder coating spraying, the particle size diameter of the powder is 30-45 micrometers, so that the leveling rate and the powdering rate can be balanced, the automobile hub coating film has excellent surface properties such as paint film gloss and plumpness, the powder particle diameter of the finish coating is sequentially larger than the powder particle diameters of the intermediate coating and the primer layer, and the thickness of the intermediate coating is sequentially larger than the thicknesses of the primer layer and the finish coating. According to the invention, the powder coating mode is adopted, so that the automobile hub coating is free of the primer, and a new development direction is formed, the VOC emission in the whole coating process is reduced by about 20% according to the zero VOC characteristic of the powder coating, the coating process is reduced, the efficiency is improved, the yield is improved, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of automobile hub protection, in particular to an automobile hub coating film.
Background
The hub (Car Rim) is the part of the wheel center where the axle is mounted, that is, the "Rim" or "steel ring" of people. Therefore, selection of a hub surface coating film is particularly important, and the hub surface coating film is required to have excellent mechanical properties, good horizontal fluidity, salt spray resistance, weather resistance, and the like in addition to good surface quality and workability.
However, the surface of the automobile hub is mostly rough casting surface, which causes poor contact of the coating film and affects the service life of the coating film, and the automobile hub is a main bearing part of the automobile, which not only requires sufficient mechanical strength, but also requires sufficient toughness to ensure the impact resistance, and the hub is easy to be stained with dirt, and if the automobile hub is not clean for a long time, the automobile hub is likely to be corroded and deformed, so that the potential safety hazard is generated.
Therefore, it is necessary to invent a coating film for automobile wheel hub to solve the above problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an automobile hub coating, which is a new development direction by adopting a powder coating mode to remove base coat in automobile hub coating, so that the VOC emission in the whole coating process is reduced by about 20 percent according to the zero VOC characteristic of the powder coating, the coating process is reduced, the efficiency is improved, the yield is improved, and the cost is reduced, thereby solving the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an automobile hub film, includes the wheel hub body, wheel hub body surface has set gradually priming paint layer, intermediate coat and finish paint layer from inside to outside, priming paint layer, intermediate coat and finish paint layer all adopt powder coating spray forming to set up, the particle diameter of this powder is 30-45 microns, can balance levelling and powdering rate like this, has surface properties such as excellent paint film gloss and plumpness, the powder particle diameter of finish paint layer is greater than the powder particle diameter of intermediate coat and priming paint layer in proper order, the thickness of intermediate coat is greater than the thickness of priming paint layer and finish paint layer in proper order, this powder coating adopts anticorrosive epoxy to constitute for the major constituent, this powder shape is globular setting, this anticorrosive epoxy adopts bisphenol A, liquid caustic soda, excessive epichlorohydrin and auxiliary agent material preparation to form, the liquid alkali is a mixed liquid formed by mixing a sodium hydroxide aqueous solution, a sodium chloride aqueous solution and water, and the auxiliary agent is an anticorrosive agent, a film-forming agent, a thickening agent and a dispersing agent.
Preferably, the anti-corrosion epoxy resin is one of the powder coating with an epoxy equivalent of 740-860eq/100g, wherein the powder coating has an epoxy equivalent of 840eq/100g, 780eq/100g and 810eq/100 g.
Preferably, the softening point of the anticorrosion epoxy resin is 87-91 ℃, and the softening point of the powder coating is one of 90 ℃, 88 ℃ and 89 ℃.
Preferably, the content of organic chlorine in the anticorrosive epoxy resin is less than or equal to 0.002eq/100g, and the content of organic chlorine in the powder coating is one of 0.0015eq/100g, 0.0011eq/100g and 0.0009eq/100 g.
Preferably, the inorganic chlorine content of the anticorrosive epoxy resin is less than or equal to 0.0004eq/100g, and the inorganic chlorine content of the powder coating is one of 0.00031eq/100g, 0.0002eq/100g and 0.00038eq/100 g.
Preferably, the volatility of the anticorrosion epoxy resin is less than or equal to 0.2 percent, and the volatility of the powder coating is one of 0.19 percent, 0.15 percent and 0.10 percent.
Preferably, the anti-corrosion epoxy resin has a color number of less than or equal to 2, wherein the color number is calculated by a Gardner method, and the color number of the powder coating is one of 1.7, 1.9 and 1.5.
Preferably, the primer layer, the intermediate coating and the finish coating are all set by adopting an electrostatic spraying technology, and the adopted equipment is an electrostatic spraying machine.
Preferably, the electrostatic spraying technology is as follows: high voltage direct current of 30kV to 90kV is applied to an electrode of a spray gun and a grounded metal element, and the powder coating is sprayed into the air by a compressed air method. The spray gun ionizes surrounding air particles during discharging, when the charged particles collide with particles of powder coating, charged powder particles are formed, the charged particles are adsorbed on the surface of a hub of an automobile, and the surface of an automobile workpiece can continuously adsorb the charged powder particles before insulation damage due to slow speed of releasing charges.
The invention has the technical effects and advantages that:
1. according to the invention, the powder coating is adopted to spray the primer layer, the intermediate coating and the finish paint layer on the surface of the automobile hub, so that the primer layer effectively utilizes the phenomenon that the powder coating does not contain a solvent, the paint has good mark filling and covering performance, and covers surface defects with the first coating of the automobile hub, and the powder coating is not easy to sag and can easily reach the phenomenon of single-layer high film thickness.
2. According to the invention, the powder coating mode is adopted, so that the automobile hub coating has an environment-friendly trend of 'paint-to-powder', the traditional 4-coating mode is changed into 3-coating mode, the base paint is cancelled, and the base powder with the integrated bottom surface is used, so that a new development direction is formed, the VOC emission in the whole coating process is reduced by about 20% according to the zero VOC characteristic of the powder coating, the coating process is reduced, the efficiency is increased, the yield is increased, and the cost is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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 utility model provides an automobile wheel hub coats, includes the wheel hub body, its characterized in that: the wheel hub body surface has set gradually priming paint layer, intermediate coat and finish paint layer from inside to outside, priming paint layer, intermediate coat and finish paint layer all adopt powder coating spray forming to set up, the particle diameter of this powder is 30-45 microns, the powder particle diameter of finish paint layer is greater than the powder particle diameter of intermediate coat and priming paint layer in proper order, the thickness of intermediate coat is greater than the thickness of priming paint layer and finish paint layer in proper order, this powder coating adopts anticorrosive epoxy to constitute for the major constituent, this powder shape is globular setting, this anticorrosive epoxy adopts bisphenol A, liquid caustic soda, excessive epichlorohydrin and auxiliary agent material to prepare and forms, the liquid caustic soda is the mixed solution that sodium hydroxide aqueous solution, sodium chloride aqueous solution and water mixed and form, the auxiliary agent is anticorrosive, film former, The preparation method of the anticorrosive epoxy resin comprises the following steps: putting bisphenol A, excessive epoxy chloropropane and an auxiliary agent into a reaction kettle in sequence, stirring and heating, slowly dropwise adding a sodium hydroxide aqueous solution and a sodium chloride aqueous solution, heating for two hours at the temperature of 95 ℃, performing water elution and pressure to obtain an anticorrosive epoxy resin with the epoxy equivalent of 740 & lt- & gt 860eq/100g, the softening point of 87-91 ℃, the organic chlorine content of less than or equal to 0.002eq/100g, the inorganic chlorine content of less than or equal to 0.0004eq/100g, the volatile content of less than or equal to 0.2% and the chroma of less than or equal to 2, selecting the anticorrosive epoxy resin with the epoxy equivalent of 840eq/100g, the softening point of 90 ℃, the organic chlorine content of 0.0015eq/100g, the inorganic chlorine content of 0.00031eq/100g, the volatile content of 0.19% and the chroma of 1.7 as a resin raw material to prepare a powder coating, and then sequentially spraying the powder coating on the surface of a hub body by adopting an electrostatic spraying technology, A middle coating and a top coating.
Example 2:
the utility model provides an automobile wheel hub coats, includes the wheel hub body, its characterized in that: the wheel hub body surface has set gradually priming paint layer, intermediate coat and finish paint layer from inside to outside, priming paint layer, intermediate coat and finish paint layer all adopt powder coating spray forming to set up, the particle diameter of this powder is 30-45 microns, the powder particle diameter of finish paint layer is greater than the powder particle diameter of intermediate coat and priming paint layer in proper order, the thickness of intermediate coat is greater than the thickness of priming paint layer and finish paint layer in proper order, this powder coating adopts anticorrosive epoxy to constitute for the major constituent, this powder shape is globular setting, this anticorrosive epoxy adopts bisphenol A, liquid caustic soda, excessive epichlorohydrin and auxiliary agent material to prepare and forms, the liquid caustic soda is the mixed solution that sodium hydroxide aqueous solution, sodium chloride aqueous solution and water mixed and form, the auxiliary agent is anticorrosive, film former, The preparation method of the anticorrosive epoxy resin comprises the following steps: putting bisphenol A, excessive epichlorohydrin and an auxiliary agent into a reaction kettle in sequence, stirring and heating, slowly dropwise adding a sodium hydroxide aqueous solution and a sodium chloride aqueous solution, heating for two hours at the temperature of 95 ℃, performing water elution and pressing to obtain an anticorrosive epoxy resin with the epoxy equivalent of 740 & lt- & gt 860 & eq/100g, the softening point of 87-91 ℃, the organic chlorine content of less than or equal to 0.002eq/100g, the inorganic chlorine content of less than or equal to 0.0004eq/100g, the volatile content of less than or equal to 0.2% and the chroma of less than or equal to 2, selecting the anticorrosive epoxy resin with the epoxy equivalent of 780eq/100g, the softening point of 88 ℃, the organic chlorine content of 0.0011eq/100g, the inorganic chlorine content of 0.0002eq/100g, the volatile content of 0.15% and the chroma of 1.9 as a resin raw material to prepare a powder coating, and then sequentially spraying the powder coating on the surface of a hub body by adopting an electrostatic spraying technology, A middle coating and a top coating.
Example 3:
the utility model provides an automobile wheel hub coats, includes the wheel hub body, its characterized in that: the wheel hub body surface has set gradually priming paint layer, intermediate coat and finish paint layer from inside to outside, priming paint layer, intermediate coat and finish paint layer all adopt powder coating spray forming to set up, the particle diameter of this powder is 30-45 microns, the powder particle diameter of finish paint layer is greater than the powder particle diameter of intermediate coat and priming paint layer in proper order, the thickness of intermediate coat is greater than the thickness of priming paint layer and finish paint layer in proper order, this powder coating adopts anticorrosive epoxy to constitute for the major constituent, this powder shape is globular setting, this anticorrosive epoxy adopts bisphenol A, liquid caustic soda, excessive epichlorohydrin and auxiliary agent material to prepare and forms, the liquid caustic soda is the mixed solution that sodium hydroxide aqueous solution, sodium chloride aqueous solution and water mixed and form, the auxiliary agent is anticorrosive, film former, The preparation method of the anticorrosive epoxy resin comprises the following steps: putting bisphenol A, excessive epichlorohydrin and an auxiliary agent into a reaction kettle in sequence, stirring and heating, slowly dropwise adding a sodium hydroxide aqueous solution and a sodium chloride aqueous solution, heating for two hours at the temperature of 95 ℃, performing water elution and pressing to obtain an anticorrosive epoxy resin with the epoxy equivalent of 740 & lt- & gt 860 & eq/100g, the softening point of 87-91 ℃, the organic chlorine content of less than or equal to 0.002eq/100g, the inorganic chlorine content of less than or equal to 0.0004eq/100g, the volatile content of less than or equal to 0.2% and the chroma of less than or equal to 2, selecting the anticorrosive epoxy resin with the epoxy equivalent of 810eq/100g, the softening point of 89 ℃, the organic chlorine content of 0.0009eq/100g, the inorganic chlorine content of 0.00038eq/100g, the volatile content of 0.10% and the chroma of 1.5 as a resin raw material to prepare a powder coating, and then sequentially spraying the powder coating on the surface of a hub body by adopting an electrostatic spraying technology, A middle coating and a top coating.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalent substitutions and modifications may be made to some features of the embodiments described above, and any modifications, equivalents, improvements, etc. within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides an automobile wheel hub coats, includes the wheel hub body, its characterized in that: the surface of the hub body is sequentially provided with a primer layer, a middle coating layer and a finish paint layer from inside to outside, the primer layer, the middle coating layer and the finish paint layer are all formed by powder paint spraying, the diameter of the powder particle is 30-45 microns, the diameter of the powder particle of the surface paint layer is sequentially larger than the diameter of the powder particle of the intermediate coating layer and the diameter of the powder particle of the primer layer, the thickness of the intermediate coating is sequentially greater than that of the primer layer and the finish coating, the powder coating is formed by taking anti-corrosion epoxy resin as a main component, the powder is arranged in a spherical shape, the anti-corrosion epoxy resin is prepared by bisphenol A, liquid caustic soda, excessive epichlorohydrin and an auxiliary material, the liquid alkali is a mixed liquid formed by mixing a sodium hydroxide aqueous solution, a sodium chloride aqueous solution and water, and the auxiliary agent is an anticorrosive agent, a film-forming agent, a thickening agent and a dispersing agent.
2. The automobile hub coating film according to claim 1, characterized in that: the anti-corrosion epoxy resin has an epoxy equivalent of 740-860eq/100g, wherein the epoxy equivalent of the powder coating is one of 840eq/100g, 780eq/100g and 810eq/100 g.
3. The automobile hub coating film according to claim 1, characterized in that: the softening point of the anti-corrosion epoxy resin is 87-91 ℃, and the softening point of the powder coating is one of 90 ℃, 88 ℃ and 89 ℃.
4. The automobile hub coating film according to claim 1, characterized in that: the content of organic chlorine in the anticorrosive epoxy resin is less than or equal to 0.002eq/100g, and the content of organic chlorine in the powder coating is one of 0.0015eq/100g, 0.0011eq/100g and 0.0009eq/100 g.
5. The automobile hub coating film according to claim 1, characterized in that: the inorganic chlorine content of the anti-corrosion epoxy resin is less than or equal to 0.0004eq/100g, and the inorganic chlorine content of the powder coating is one of 0.00031eq/100g, 0.0002eq/100g and 0.00038eq/100 g.
6. The automobile hub coating film according to claim 1, characterized in that: the volatility of the anticorrosive epoxy resin is less than or equal to 0.2 percent, and the volatility of the powder coating is one of 0.19 percent, 0.15 percent and 0.10 percent.
7. The automobile hub coating film according to claim 1, characterized in that: the chroma of the anticorrosive epoxy resin is less than or equal to 2, wherein the chroma is calculated by a Gardner method, and the chroma of the powder coating is one of 1.7, 1.9 and 1.5.
8. The automobile hub coating film according to claim 1, characterized in that: the primer layer, the intermediate coating and the finish paint layer are all set by adopting an electrostatic spraying technology, and the adopted equipment is an electrostatic spraying machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910798332.1A CN110588240A (en) | 2019-08-27 | 2019-08-27 | Automobile hub coating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910798332.1A CN110588240A (en) | 2019-08-27 | 2019-08-27 | Automobile hub coating film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110588240A true CN110588240A (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910798332.1A Pending CN110588240A (en) | 2019-08-27 | 2019-08-27 | Automobile hub coating film |
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| CN (1) | CN110588240A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321988A (en) * | 2021-07-14 | 2021-08-31 | 悦诚(扬州)新材料有限公司 | Epoxy powder coating for pipeline corrosion prevention and spraying process of pipeline corrosion prevention coating |
| CN115584188A (en) * | 2022-12-14 | 2023-01-10 | 佛山市涂亿装饰材料科技有限公司 | Preparation method of powder coating and marbleized powder spraying coating |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321988A (en) * | 2021-07-14 | 2021-08-31 | 悦诚(扬州)新材料有限公司 | Epoxy powder coating for pipeline corrosion prevention and spraying process of pipeline corrosion prevention coating |
| CN115584188A (en) * | 2022-12-14 | 2023-01-10 | 佛山市涂亿装饰材料科技有限公司 | Preparation method of powder coating and marbleized powder spraying coating |
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Application publication date: 20191220 |
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