CN111218178A - Motorcycle wheel hub capable of automatically healing paint film scratch and preparation method thereof - Google Patents

Motorcycle wheel hub capable of automatically healing paint film scratch and preparation method thereof Download PDF

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Publication number
CN111218178A
CN111218178A CN201910392796.2A CN201910392796A CN111218178A CN 111218178 A CN111218178 A CN 111218178A CN 201910392796 A CN201910392796 A CN 201910392796A CN 111218178 A CN111218178 A CN 111218178A
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CN
China
Prior art keywords
agent
parts
water
motorcycle
hub
Prior art date
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Pending
Application number
CN201910392796.2A
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Chinese (zh)
Inventor
朱贤忠
吕允刚
刘建平
江道锋
张金萍
姚玉兰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Wanfeng Motorcycle Wheels Co ltd
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Zhejiang Wanfeng Motorcycle Wheels Co ltd
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Application filed by Zhejiang Wanfeng Motorcycle Wheels Co ltd filed Critical Zhejiang Wanfeng Motorcycle Wheels Co ltd
Priority to CN201910392796.2A priority Critical patent/CN111218178A/en
Publication of CN111218178A publication Critical patent/CN111218178A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04Homopolymers or copolymers of esters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50Multilayers
    • B05D7/56Three layers or more
    • B05D7/57Three layers or more the last layer being a clear coat
    • B05D7/574Three layers or more the last layer being a clear coat at least some layers being let to dry at least partially before applying the next layer
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D163/00Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/002Priming paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/63Additives non-macromolecular organic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/65Additives macromolecular
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2502/00Acrylic polymers

Abstract

The invention discloses a motorcycle hub with a paint film capable of automatically healing scratches, wherein the surface of the motorcycle hub is sequentially sprayed with a primer, a finish paint and a varnish, wherein the finish paint comprises a water-based acrylic acid dispersoid, a PTM microcapsule, an EA/TPGDA microcapsule, a neutralizer, a wetting agent, a defoaming agent, water-based amino resin, a thickening agent, a pigment and deionized water; the primer comprises water-based pigment, water-based acrylic resin, water-based epoxy resin, a film forming auxiliary agent, a flatting agent, a defoaming agent, a dispersing agent and deionized water. And spraying the prepared primer and finish paint on the surface of the hub of the motorcycle in sequence, curing to form a film, and then spraying conventional varnish to form a paint film. The paint film can automatically repair the scratch scratches when being scratched by external force, and the repaired scratch part can be recovered to the degree that the scratches can not be seen by naked eyes.

Description

Motorcycle wheel hub capable of automatically healing paint film scratch and preparation method thereof
The technical field is as follows:
the invention relates to the field of motorcycle hubs, in particular to a motorcycle hub with a paint film capable of automatically healing scratches.
Background art:
motorcycles are two-wheeled or three-wheeled vehicles that are driven by an engine and steered by steering a front wheel with a handlebar. The main structure of the motorcycle comprises a power transportation system, a steering system, a brake system, a cooling system, an electric power system, a shock absorption system and the like. The development of the motorcycle is behind the bicycle and in front of the automobile, and the motorcycle becomes one of the main transportation tools of people in the current society due to the characteristics of small volume, high flexibility, low energy consumption, good trafficability, rapid driving, low price and the like.
The hub is an important safety part for bearing the motorcycle, the safety requirement is very high, and a paint film is often sprayed on the surface of the hub in order to improve the corrosion resistance, the aging resistance and the service performance of the motorcycle hub. However, in the use process of the motorcycle, due to the fact that the motorcycle is high in driving speed and relatively low in stability, the paint film is easily affected by external force, and therefore the state that the surface of the paint film is slightly scratched is left on the surface of the paint film.
The invention provides a novel coating material by solving the problem that a paint film is easy to scratch when being subjected to external force and changing the conventional coating material for the hub through research, the novel coating material is sprayed on the surface of the hub of the motorcycle, and after the paint film is scratched, the smooth hand feeling can be recovered only by heating finish paint for a period of time.
The invention content is as follows:
in order to solve the technical problems, the invention provides a motorcycle hub with a paint film capable of automatically healing scratches, which is characterized in that a new independently developed coating material is sprayed on the surface of the hub, when the formed paint film is scratched due to external force, the paint film can be recovered to a smooth hand feeling after being heated for a period of time, compared with the traditional coating material, the slight scratches can be reduced by about 80%, and if the recovery process is accelerated, hot water or hot air can be used for heating the scratched area.
In order to better solve the technical problems, the invention adopts the following technical scheme:
a motorcycle hub with a paint film capable of automatically healing is characterized in that a primer, a finish paint and a varnish are sequentially sprayed on the surface of the motorcycle hub, wherein the finish paint comprises a water-based acrylic acid dispersoid, a PTM microcapsule, an EA/TPGDA microcapsule, a neutralizer, a wetting agent, a defoaming agent, water-based amino resin, a thickening agent, a pigment and deionized water; the primer comprises water-based pigment, water-based acrylic resin, water-based epoxy resin, a film forming auxiliary agent, a flatting agent, a defoaming agent, a dispersing agent and deionized water.
Preferably, the finish paint comprises the following components in parts by weight: 40-45 parts of aqueous acrylic acid dispersoid, 5-10 parts of PTM microcapsule, 5-10 parts of EA/TPGDA microcapsule, 0.1-0.2 part of neutralizing agent, 0.1 part of wetting agent, 0.2 part of defoaming agent, 3-5 parts of aqueous amino resin, 0.4 part of thickening agent, 9-10 parts of pigment and 18.9 parts of deionized water.
Preferably, in the above technical solution, the primer comprises the following components in parts by weight: 5-25 parts of water-based pigment, 10-20 parts of water-based acrylic resin, 40-60 parts of water-based epoxy resin, 5-10 parts of film-forming assistant, 1-2 parts of flatting agent, 0.2-0.5 part of defoaming agent, 1-2 parts of dispersing agent and 10-20 parts of deionized water.
Preferably, the aqueous acrylic dispersion is an aqueous hydroxy acrylic copolymer, and the acid value is less than 50 mgKOH/g.
Preferably, the neutralizing agent is a neutralizing agent DMEA; the wetting agent is a digao wetting agent, and the defoaming agent is an organic silicon defoaming agent; the thickening agent is a mixture of a thickening agent PAE and a thickening agent P-91, and the mass ratio of the thickening agent PAE to the thickening agent P-91 is 1: 1; the film-forming assistant is one of ethylene glycol, propylene glycol, ethylene glycol butyl ether, dipropylene glycol monomethyl ether, hexanediol butyl ether acetate, diisobutyl adipate and alcohol ester twelve; the leveling agent is a water-based leveling agent BYK-333, and the dispersing agent is a water-based dispersing agent HTA 30.
As the optimization of the technical scheme, the preparation method of the PTM microcapsule specifically comprises the following steps:
dissolving benzoyl peroxide in toluene to prepare a benzoyl peroxide solution with the mass concentration of 3-5%, dissolving pentaerythritol and 3-mercaptopropionic acid in deionized water, adding the benzoyl peroxide solution while stirring at the rotating speed of 1500 rpm, adjusting the distance between ultraviolet light and the mixed solution to be 10cm by adopting ultraviolet light under the power of 1000W for the mixed solution prepared after stirring, carrying out irradiation treatment for 10min, filtering after the treatment is finished, washing a precipitate by using deionized water, and carrying out vacuum freeze drying treatment to prepare the PTM microcapsule;
preferably, in the technical scheme, the mass ratio of the pentaerythritol to the 3-mercaptopropionic acid to the benzoyl peroxide is 2: (6-7): (0.35-0.65).
As the optimization of the technical scheme, the preparation method of the EA/TPGDA microcapsule specifically comprises the following steps:
dissolving sodium dodecyl benzene sulfonate in deionized water to prepare a sodium dodecyl benzene sulfonate solution, adding EA and TPGDA under the stirring of 3000 r/min, stirring and mixing for 10min, then adding benzoyl peroxide to prepare an emulsion, treating the emulsion for 20min under the irradiation of ultraviolet light, then taking out, filtering, sequentially washing precipitates by using deionized water, and freeze-drying to prepare the EA/TPGDA microcapsule.
Preferably, in the above technical solution, the mass concentration of the sodium dodecylbenzenesulfonate solution is 1%.
Preferably, in the technical scheme, the mass ratio of the sodium dodecyl benzene sulfonate, EA, TPGDA and benzoyl peroxide is 8: (4-6): (0.5-1): 0.3.
preferably, the conditions of the ultraviolet irradiation are as follows: 1200W of power, and the distance between the ultraviolet light and the emulsion is 8-13 cm.
In addition, in order to further solve the technical problem, the invention also discloses a preparation method of the motorcycle hub with the paint film capable of automatically healing scratches, which specifically comprises the following steps:
(1) mixing and grinding the aqueous acrylic acid dispersoid, the PTM microcapsule, the EA/TPGDA microcapsule, the aqueous amino resin and deionized water, then adding a neutralizing agent, a wetting agent, a defoaming agent, a thickening agent and a pigment, and stirring and mixing uniformly to obtain finish paint;
(2) stirring and mixing the water-based acrylic resin, the water-based epoxy resin and the deionized water, then continuously adding the film-forming assistant, the flatting agent, the defoaming agent, the dispersing agent and the water-based pigment, and stirring and dispersing to prepare the primer;
(3) the surface of the hub of the motorcycle is polished by sand paper, and is sequentially subjected to acid washing, water washing, acid washing and water washing, and is dried at 120 ℃ to prepare the pretreated hub of the motorcycle;
(4) spraying the primer prepared above on the surface of the motorcycle hub to form a primer coating; and spraying the prepared finish paint on the surface of the primer coating to form a finish paint coating, then drying at 100-120 ℃, finally spraying varnish on the surface of the finish paint coating to form a varnish coating, and drying to obtain the motorcycle hub with the paint film capable of automatically healing.
The varnish adopted by the invention is oily paint and conventional varnish, and the varnish is a layer of transparent bright paint which is sprayed on the surface of the motorcycle hub, so that the surface is flat and bright.
Preferably, the thicknesses of the primer coating, the finish coating and the varnish coating are 10-15 μm, 15-25 μm and 8-12 μm in sequence.
The invention has the following beneficial effects:
the invention sprays the priming paint, the finish paint and the varnish on the surface of the motorcycle hub in sequence, and can effectively improve the bonding performance between coatings and the adhesion between the coatings and the motorcycle hub body by effectively adjusting the composition of the finish paint and the varnish. The invention finally sprays a layer of conventional varnish which is a layer of transparent bright paint on the surface of the finish paint, and the conventional varnish is sprayed on the surface of the hub as the last process, so that the surface is smooth and bright.
The invention adopts PTM microcapsule, EA/TPGDA microcapsule, aqueous acrylic acid dispersoid and aqueous amino resin as main components, and adds various auxiliary agents to form finish paint which is used as a color development layer, thereby not only having good chroma, but also having good flexibility, large adhesive density and toughness, when the finish paint is scratched, the finish paint can be recovered to smooth hand feeling by adopting heating treatment, compared with the common coating material in the prior art, the slight scratch is reduced by about 80 percent, even if a certain degree of scratch occurs, the finish paint can be recovered to the state before the scratch after being heated for a period of time. And when the motorcycle is exposed to sunlight outdoors, the temperature of the finish paint of various colors can reach more than 90 ℃, and the scratch can be automatically repaired. After the detection, when the paint film on the surface of the motorcycle wheel hub is scratched, the distance between the light source and the scratched part is about 10cm, the temperature is controlled to be 50-60 ℃, and the scratched part is irradiated for 5min to return to the degree that the scratch can not be seen by naked eyes.
Description of the drawings:
FIG. 1 is a schematic drawing of the paint film structure.
Fig. 2 is a spraying effect diagram of a motorcycle hub.
The specific implementation mode is as follows:
in order to better understand the present invention, the following examples further illustrate the invention, the examples are only used for explaining the invention, not to constitute any limitation of the invention.
Example 1
Mixing and grinding 40 parts of aqueous acrylic acid dispersoid, 5 parts of PTM microcapsule, 5 parts of EA/TPGDA microcapsule, 3 parts of aqueous amino resin and 18.9 parts of deionized water, then adding 0.1 part of neutralizing agent, 0.1 part of wetting agent, 0.2 part of defoaming agent, 0.4 part of thickening agent and 9 parts of pigment, and stirring and mixing uniformly to obtain finish paint; stirring and mixing 10 parts of waterborne acrylic resin, 40 parts of waterborne epoxy resin and 10 parts of deionized water, then continuously adding 5 parts of film-forming auxiliary agent, 1 part of flatting agent, 0.2 part of defoaming agent, 1 part of dispersing agent and 5 parts of waterborne pigment, and stirring and dispersing to obtain the primer; the surface of the hub of the motorcycle is polished by sand paper, and is sequentially subjected to acid washing, water washing, acid washing and water washing, and is dried at 120 ℃ to prepare the pretreated hub of the motorcycle; spraying a primer on the surface of the hub of the motorcycle to form a primer coating with the thickness of 10-15 mu m; spraying the prepared finish paint on the surface of the primer paint to form a finish paint coating with the thickness of 15-25 mu m, then drying at 100-120 ℃, finally spraying the finish paint on the surface of the finish paint coating to form a varnish coating with the thickness of 8-12 mu m, and drying to obtain the motorcycle hub with the automatically healed paint film scratch.
Example 2
Mixing and grinding 45 parts of aqueous acrylic acid dispersoid, 10 parts of PTM microcapsule, 10 parts of EA/TPGDA microcapsule, 5 parts of aqueous amino resin and 18.9 parts of deionized water, then adding 0.2 part of neutralizing agent, 0.1 part of wetting agent, 0.2 part of defoaming agent, 0.4 part of thickening agent and 10 parts of pigment, and stirring and mixing uniformly to obtain finish paint; stirring and mixing 20 parts of waterborne acrylic resin, 60 parts of waterborne epoxy resin and 20 parts of deionized water, then continuously adding 10 parts of film-forming auxiliary agent, 2 parts of flatting agent, 0.5 part of defoaming agent, 2 parts of dispersing agent and 25 parts of waterborne pigment, and stirring and dispersing to obtain the primer; the surface of the hub of the motorcycle is polished by sand paper, and is sequentially subjected to acid washing, water washing, acid washing and water washing, and is dried at 120 ℃ to prepare the pretreated hub of the motorcycle; spraying a primer on the surface of the hub of the motorcycle to form a primer coating with the thickness of 10-15 mu m; spraying the prepared finish paint on the surface of the primer paint to form a finish paint coating with the thickness of 15-25 mu m, then drying at 100-120 ℃, finally spraying the finish paint on the surface of the finish paint coating to form a varnish coating with the thickness of 8-12 mu m, and drying to obtain the motorcycle hub with the automatically healed paint film scratch.
Example 3
Mixing and grinding 41 parts of aqueous acrylic acid dispersoid, 6 parts of PTM microcapsule, 6 parts of EA/TPGDA microcapsule, 3.5 parts of aqueous amino resin and 18.9 parts of deionized water, then adding 0.12 part of neutralizing agent, 0.1 part of wetting agent, 0.2 part of defoaming agent, 0.4 part of thickening agent and 9 parts of pigment, and stirring and mixing uniformly to obtain finish paint; stirring and mixing 12 parts of waterborne acrylic resin, 43 parts of waterborne epoxy resin and 12 parts of deionized water, then continuously adding 6 parts of film-forming aid, 1.2 parts of flatting agent, 0.25 part of defoaming agent, 1.2 parts of dispersing agent and 10 parts of waterborne pigment, and stirring and dispersing to obtain the primer; the surface of the hub of the motorcycle is polished by sand paper, and is sequentially subjected to acid washing, water washing, acid washing and water washing, and is dried at 120 ℃ to prepare the pretreated hub of the motorcycle; spraying a primer on the surface of the hub of the motorcycle to form a primer coating with the thickness of 10-15 mu m; spraying the prepared finish paint on the surface of the primer paint to form a finish paint coating with the thickness of 15-25 mu m, then drying at 100-120 ℃, finally spraying the finish paint on the surface of the finish paint coating to form a varnish coating with the thickness of 8-12 mu m, and drying to obtain the motorcycle hub with the automatically healed paint film scratch.
Example 4
Mixing and grinding 42 parts of aqueous acrylic acid dispersoid, 7 parts of PTM microcapsule, 7 parts of EA/TPGDA microcapsule, 4 parts of aqueous amino resin and 18.9 parts of deionized water, then adding 0.15 part of neutralizing agent, 0.1 part of wetting agent, 0.2 part of defoaming agent, 0.4 part of thickening agent and 9.5 parts of pigment, and stirring and mixing uniformly to obtain finish paint; stirring and mixing 15 parts of waterborne acrylic resin, 45 parts of waterborne epoxy resin and 15 parts of deionized water, then continuously adding 7 parts of film-forming auxiliary agent, 1.5 parts of flatting agent, 0.3 part of defoaming agent, 1.5 parts of dispersing agent and 13 parts of waterborne pigment, and stirring and dispersing to obtain the primer; the surface of the hub of the motorcycle is polished by sand paper, and is sequentially subjected to acid washing, water washing, acid washing and water washing, and is dried at 120 ℃ to prepare the pretreated hub of the motorcycle; spraying a primer on the surface of the hub of the motorcycle to form a primer coating with the thickness of 10-15 mu m; spraying the prepared finish paint on the surface of the primer paint to form a finish paint coating with the thickness of 15-25 mu m, then drying at 100-120 ℃, finally spraying the finish paint on the surface of the finish paint coating to form a varnish coating with the thickness of 8-12 mu m, and drying to obtain the motorcycle hub with the automatically healed paint film scratch.
Example 5
Mixing and grinding 43 parts of aqueous acrylic acid dispersoid, 8 parts of PTM microcapsule, 8 parts of EA/TPGDA microcapsule, 4.5 parts of aqueous amino resin and 18.9 parts of deionized water, then adding 0.16 part of neutralizing agent, 0.1 part of wetting agent, 0.2 part of defoaming agent, 0.4 part of thickening agent and 9 parts of pigment, and stirring and mixing uniformly to obtain finish paint; stirring and mixing 17 parts of waterborne acrylic resin, 50 parts of waterborne epoxy resin and 18 parts of deionized water, then continuously adding 7 parts of film-forming aid, 1.8 parts of flatting agent, 0.4 part of defoaming agent, 1.6 parts of dispersing agent and 20 parts of waterborne pigment, and stirring and dispersing to obtain the primer; the surface of the hub of the motorcycle is polished by sand paper, and is sequentially subjected to acid washing, water washing, acid washing and water washing, and is dried at 120 ℃ to prepare the pretreated hub of the motorcycle; spraying a primer on the surface of the hub of the motorcycle to form a primer coating with the thickness of 10-15 mu m; spraying the prepared finish paint on the surface of the primer paint to form a finish paint coating with the thickness of 15-25 mu m, then drying at 100-120 ℃, finally spraying the finish paint on the surface of the finish paint coating to form a varnish coating with the thickness of 8-12 mu m, and drying to obtain the motorcycle hub with the automatically healed paint film scratch.
Example 6
Mixing and grinding 44 parts of aqueous acrylic acid dispersoid, 9 parts of PTM microcapsule, 9 parts of EA/TPGDA microcapsule, 4.5 parts of aqueous amino resin and 18.9 parts of deionized water, then adding 0.2 part of neutralizing agent, 0.1 part of wetting agent, 0.2 part of defoaming agent, 0.4 part of thickening agent and 9 parts of pigment, and stirring and mixing uniformly to obtain finish paint; stirring and mixing 15 parts of waterborne acrylic resin, 55 parts of waterborne epoxy resin and 18 parts of deionized water, then continuously adding 8 parts of film-forming aid, 1.5 parts of flatting agent, 0.45 part of defoaming agent, 1 part of dispersing agent and 22 parts of waterborne pigment, and stirring and dispersing to obtain the primer; the surface of the hub of the motorcycle is polished by sand paper, and is sequentially subjected to acid washing, water washing, acid washing and water washing, and is dried at 120 ℃ to prepare the pretreated hub of the motorcycle; spraying a primer on the surface of the hub of the motorcycle to form a primer coating with the thickness of 10-15 mu m; spraying the prepared finish paint on the surface of the primer paint to form a finish paint coating with the thickness of 15-25 mu m, then drying at 100-120 ℃, finally spraying the finish paint on the surface of the finish paint coating to form a varnish coating with the thickness of 8-12 mu m, and drying to obtain the motorcycle hub with the automatically healed paint film scratch.
Although specific embodiments of the invention have been described, many other forms and modifications of the invention will be apparent to those skilled in the art. It is to be understood that the appended claims and this invention generally cover all such obvious forms and modifications which are within the true spirit and scope of the present invention.

Claims (10)

1. A motorcycle hub with a paint film capable of automatically healing is characterized in that the surface of the motorcycle hub is sequentially sprayed with a primer, a finish paint and a varnish, wherein the finish paint comprises a water-based acrylic acid dispersoid, a PTM microcapsule, an EA/TPGDA microcapsule, a neutralizer, a wetting agent, a defoaming agent, a water-based amino resin, a thickening agent, a pigment and deionized water; the primer comprises water-based pigment, water-based acrylic resin, water-based epoxy resin, a film forming auxiliary agent, a flatting agent, a defoaming agent, a dispersing agent and deionized water.
2. The motorcycle hub capable of automatically healing the paint film scratch according to claim 1, characterized in that the amount of each component in the finish paint is respectively as follows by weight: 40-45 parts of aqueous acrylic acid dispersoid, 5-10 parts of PTM microcapsule, 5-10 parts of EA/TPGDA microcapsule, 0.1-0.2 part of neutralizing agent, 0.1 part of wetting agent, 0.2 part of defoaming agent, 3-5 parts of aqueous amino resin, 0.4 part of thickening agent, 9-10 parts of pigment and 18.9 parts of deionized water.
3. The motorcycle hub capable of automatically healing the paint film scratch according to claim 1, characterized in that the primer comprises the following components in parts by weight: 5-25 parts of water-based pigment, 10-20 parts of water-based acrylic resin, 40-60 parts of water-based epoxy resin, 5-10 parts of film-forming assistant, 1-2 parts of flatting agent, 0.2-0.5 part of defoaming agent, 1-2 parts of dispersing agent and 10-20 parts of deionized water.
4. The motorcycle hub with the paint film scratch automatically healing according to claim 1, wherein the aqueous acrylic acid dispersion is an aqueous hydroxy acrylic acid copolymer with an acid value less than 50 mgKOH/g.
5. The motorcycle wheel hub capable of automatically healing paint film scratches according to claim 1, wherein the neutralizer is a neutralizer DMEA; the wetting agent is a digao wetting agent, and the defoaming agent is an organic silicon defoaming agent; the thickening agent is a mixture of a thickening agent PAE and a thickening agent P-91, and the mass ratio of the thickening agent PAE to the thickening agent P-91 is 1: 1; the film-forming assistant is one of ethylene glycol, propylene glycol, ethylene glycol butyl ether, dipropylene glycol monomethyl ether, hexanediol butyl ether acetate, diisobutyl adipate and alcohol ester twelve; the leveling agent is a water-based leveling agent BYK-333, and the dispersing agent is a water-based dispersing agent HTA 30.
6. The motorcycle hub capable of automatically healing paint film scratches according to claim 1, wherein the preparation method of the PTM microcapsules specifically comprises the following steps:
dissolving benzoyl peroxide in toluene to prepare a benzoyl peroxide solution with the mass concentration of 3-5%, dissolving pentaerythritol and 3-mercaptopropionic acid in deionized water, adding the benzoyl peroxide solution while stirring at the rotating speed of 1500 rpm, adjusting the distance between ultraviolet light and the mixed solution to be 10cm by adopting ultraviolet light under the power of 1000W for the mixed solution prepared after stirring, carrying out irradiation treatment for 10min, filtering after the treatment is finished, washing a precipitate by using deionized water, and carrying out vacuum freeze drying treatment to prepare the PTM microcapsule.
7. The motorcycle hub capable of automatically healing the paint film scratch according to claim 6, wherein the mass ratio of pentaerythritol, 3-mercaptopropionic acid and benzoyl peroxide is 2: (6-7): (0.35-0.65).
8. The motorcycle wheel hub capable of automatically healing paint film scratches as claimed in claim 1, wherein the preparation method of said EA/TPGDA microcapsules is specifically:
dissolving sodium dodecyl benzene sulfonate in deionized water to prepare a sodium dodecyl benzene sulfonate solution with the mass concentration of 1%, adding EA and TPGDA under the stirring of 3000 r/min, stirring and mixing for 10min, then adding benzoyl peroxide to prepare an emulsion, setting the power of the emulsion to 1200W under the irradiation of ultraviolet light, setting the distance between the ultraviolet light and the emulsion to be 8-13cm, treating for 20min, then taking out, filtering, washing precipitates by using deionized water in sequence, and freeze-drying to prepare the EA/TPGDA microcapsule.
9. The motorcycle hub capable of automatically healing the paint film scratch according to claim 8, wherein the mass ratio of the sodium dodecyl benzene sulfonate, EA, TPGDA and benzoyl peroxide is 8: (4-6): (0.5-1): 0.3.
10. the method for preparing a motorcycle hub with a self-healing paint film scratch according to any one of claims 1 to 9, comprising the following steps:
(1) mixing and grinding the aqueous acrylic acid dispersoid, the PTM microcapsule, the EA/TPGDA microcapsule, the aqueous amino resin and deionized water, then adding a neutralizing agent, a wetting agent, a defoaming agent, a thickening agent and a pigment, and stirring and mixing uniformly to obtain finish paint;
(2) stirring and mixing the water-based acrylic resin, the water-based epoxy resin and the deionized water, then continuously adding the film-forming assistant, the flatting agent, the defoaming agent, the dispersing agent and the water-based pigment, and stirring and dispersing to prepare the primer;
(3) the surface of the hub of the motorcycle is polished by sand paper, and is sequentially subjected to acid washing, water washing, acid washing and water washing, and is dried at 120 ℃ to prepare the pretreated hub of the motorcycle;
(4) spraying the primer prepared above on the surface of the hub of the motorcycle to form a primer coating with the thickness of 10-15 μm; spraying the prepared finish paint on the surface of the primer paint to form a finish paint coating with the thickness of 15-25 mu m, then drying at 100-120 ℃, finally spraying the finish paint on the surface of the finish paint coating to form a varnish coating with the thickness of 8-12 mu m, and drying to obtain the motorcycle hub with the automatically healed paint film scratch.
CN201910392796.2A 2019-05-13 2019-05-13 Motorcycle wheel hub capable of automatically healing paint film scratch and preparation method thereof Pending CN111218178A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112608644A (en) * 2020-12-02 2021-04-06 浙江万丰摩轮有限公司 Motorcycle hub with multicolor coating and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
凌云星等: "《油墨技术手册(上)》", 31 May 2009 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112608644A (en) * 2020-12-02 2021-04-06 浙江万丰摩轮有限公司 Motorcycle hub with multicolor coating and preparation method thereof

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