CN104403397A - Carbon nanotube composite primer for cars, as well as preparation method and application method of carbon nanotube composite primer - Google Patents
Carbon nanotube composite primer for cars, as well as preparation method and application method of carbon nanotube composite primer Download PDFInfo
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- CN104403397A CN104403397A CN201410692570.1A CN201410692570A CN104403397A CN 104403397 A CN104403397 A CN 104403397A CN 201410692570 A CN201410692570 A CN 201410692570A CN 104403397 A CN104403397 A CN 104403397A
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- carbon nanotube
- composite primer
- automobile
- nanotube composite
- primer
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
- B05D7/26—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials synthetic lacquers or varnishes
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
Carbon nanotube composite primer for cars includes primer for cars and carbon nanotubes uniformly dispersed in the primer for cars, wherein the mass percent concentration of the carbon nanotubes in the composite primer ranges from 0.1 weight percent to 1.5 weight percent, and the sheet resistance of a carbon nanotube composite coating of the composite primer that is formed through spraying ranges from 10<3> ohms per square to 10<9> ohms per square. During preparation, the carbon nanotubes are firstly added into the primer for cars, and are then uniformly dispersed to obtain the carbon nanotube composite primer. During use, the carbon nanotube composite primer is firstly sprayed onto a nonmetal part to obtain the carbon nanotube composite coating, and finishing paint is then sprayed on the composite coating through electrostatic spraying after the coating is dried. The invention adopting the design has the advantages that the requirement for electrostatic spraying can be met, a conductive additive is easily dispersed in the primer, the added amount of the conductive additive is very small, the production cost is low, the color interference is weak, the operation is easy, and the use is convenient.
Description
Technical field
The present invention relates to a kind of vehicle priming paint, particularly relate to a kind of automobile-used carbon nanotube composite primer and preparation thereof, using method, be specifically applicable to realize, on the basis of electrostatic spraying finish paint on nonmetal component, alleviating the interference to basecoat color, and reducing costs.
Background technology
Automobile finish is the expensive of the visualize of automotive quality, high-end automobile finish, and in order to improve the service efficiency of finish paint, electrostatic spraying is a kind of development trend improving its service efficiency.Electrostatic spraying uses high tension electrostatic field to allow finish paint be sprayed on appointment component surface under the effect of electric field, the rate of utilization of finish paint can be made up to 50% – 70%, and the service efficiency of aerial spraying is just lower, generally only has 20% – 30%.Realizing electrostatic spraying needs component to conduct electricity or static conductive, and the surface resistance of general requirement component is less than 10
9Ω/, metallic substance conduction is excellent, but not metallic element is mostly insulating material, and surface resistance is generally greater than 10
14Ω/, therefore, nonmetal component will realize electrostatic spraying and must be made into antistatic material or resist quiet coating in non-metal material surface spray.Have to be reported in nonmetal component and add conductive additive to improve the specific conductivity of non-metallic material to realize electrostatic spraying, also have and spray the coating of one deck static conductive to realize electrostatic spraying at nonmetal component surface, obviously, spray at nonmetal component surface that to conduct electricity dosage needed for one deck static conductive coating few, cost is low, has better market development prospect.
At present, the conductive agent being applied to the top coat of nonmetal component mainly conducts electricity titanium white and carbon black, and these conductive agents content in coating generally just can reach anlistatig effect at 10 – 30wt.%, and conduction titanium white density is about 4g/cm
3, and paint density and be generally about 1g/cm
3, the different easily layering of density, and the carbon black of more than 10wt.%, color of paint will be caused too dark, and difficulty meets vehicle priming paint service requirements.
Chinese patent, application publication number is CN102277057A, Shen Qing Publication day is that the application for a patent for invention on December 14th, 2011 discloses a kind of conductive priming paint for plastic substrate electrostatic painting and preparation method thereof, raw material comprises thermosetting acrylic resin 20 – 30, thermoplastic acrylic resin 10 – 20, conduction titanium dioxide pigment 20 – 40, carbon black pigment 0.3 – 2, dispersion agent 1 – 3, solvent 5 – 10, ground wetting agent 0.5 – 1, thermosetting acrylic resin, dispersion agent, the solvent of 40 – 60wt%, conduction titanium dioxide pigment, thermoplastic acrylic resin is joined after carbon black pigment agitation grinding, in ground wetting agent and remaining solvent, mix and namely obtain conductive priming paint for plastic substrate electrostatic painting.Although this design has the advantage that can realize electrostatic spraying, it still has following defect:
First, the conductive additive that this design adopts mainly conducts electricity titanium dioxide pigment, and its density is about 4g/cm
3, and paint density and be generally about 1g/cm
3the different easily layering of density, conduction titanium dioxide pigment is caused not easily to disperse in paint, be difficult to mix, not only increase operation easier, and improve usage quantity, needing to add a lot of conduction titanium dioxide pigments could realize electrostatic spraying, in addition the unit price of titanium dioxide pigment of conducting electricity is higher, and its production cost is higher.
Secondly, this design needs to use a lot of conduction titanium dioxide pigments, very large to the Color influences of priming paint, and the interference of color is comparatively strong, is unfavorable for the use of finish paint.
Summary of the invention
The object of the invention is to overcome that the conductive additive existed in prior art not easily disperses in primers, addition is more, production cost is higher, the defect that the interference of color is stronger and problem, there is provided that a kind of conductive additive easily disperses in primers, addition is little, production cost is lower, the automobile-used carbon nanotube composite primer that the interference of color is more weak and preparation thereof, using method.
For realizing above object, technical solution of the present invention is: a kind of automobile-used carbon nanotube composite primer, comprises the conductive additive of vehicle paint base and inner doping thereof;
Described conductive additive is carbon nanotube, and this carbon nanotube is dispersed in vehicle paint base, and the mass percent concentration of carbon nanotube in composite primer is 0.1 – 1.5wt.%;
The surface resistance of the carbon nanotube compound coating that described composite primer is formed after spraying is 10
3– 10
9Ω/.
The mass percent concentration of described carbon nanotube in composite primer is 0.8wt.%; The surface resistance of the carbon nanotube compound coating that described composite primer is formed after spraying is 5 × 10
6Ω/.
Described carbon nanotube is single wall or multi-walled carbon nano-tubes; Described vehicle paint base is redix or acrylic resin.
A preparation method for above-mentioned automobile-used carbon nanotube composite primer, described preparation method comprises the following steps successively:
First carbon nanotube is joined in vehicle paint base to obtain mixture, again scatter operation is carried out to make carbon nanotube dispersed in vehicle paint base to this mixture, described carbon nanotube composite primer can be obtained after dispersed, in this composite primer, the mass percent concentration of carbon nanotube is 0.1 – 1.5wt.%, and the surface resistance of this composite primer carbon nanotube compound coating of formation after spraying is 10
3– 10
9Ω/.
Described scatter operation refers to ultrasonic disperse or Ball milling.
When described scatter operation is ultrasonic disperse, hyperacoustic size is 20 – 25Hz, and ultrasonic time is 60min.
State when described carbon nanotube joins vehicle paint base is Powdered or slurry.
A using method for above-mentioned automobile-used carbon nanotube composite primer, described using method comprises the following steps successively:
First described carbon nanotube composite primer is sprayed on non-metal workpiece to obtain carbon nanotube compound coating, after the drying of carbon nanotube compound coating, adopt the mode of electrostatic spraying to this compound coating spray paint again, to realize the electrostatic spraying of finish paint on non-metal workpiece.
The drying mode of described carbon nanotube compound coating is: dry 1h at 80 DEG C.
Compared with prior art, beneficial effect of the present invention is:
1, in a kind of automobile-used carbon nanotube composite primer of the present invention and preparation thereof, using method, carbon nanotube is dispersed in carbon nanotube composite primer as conductive additive, now, carbon nanotube can form three-dimensional conductive network in composite primer, the specific conductivity of composite primer can not only be improved, make its surface resistance meet the requirement of electrostatic spraying, the thermal conductivity of composite primer can also be improved simultaneously, thus improve the ageing resistance of composite primer.Therefore, the present invention can not only meet the needs of electrostatic spraying, and ageing resistance is stronger.
2, in a kind of automobile-used carbon nanotube composite primer of the present invention and preparation thereof, using method, the density of carbon nanotube and the density of vehicle paint base very close, the density of carbon nanotube is about 1.4g/cm
3, the general 1g/cm of density of vehicle paint base
3the close of density can guarantee carbon nanotube not easily layering in vehicle paint base, be convenient to dispersed in vehicle paint base of carbon nanotube, thus on the basis of improving composite primer electroconductibility, reduce the unit usage quantity of carbon nanotube, this can not only reduce costs, and too much carbon nanotube can be avoided the interference of basecoat color.Therefore, not only conductive additive easily disperses in primers in the present invention, addition is little, and production cost is lower, the interference of color is more weak.
3, in a kind of automobile-used carbon nanotube composite primer of the present invention and preparation thereof, using method, when preparing composite primer, only need carbon nanotube to join in vehicle paint base, carry out dispersed again, step is few, operates simple and easy, can save a large amount of time and manpower.Therefore, the present invention is convenient operation not only, and production cost is lower.
4, in a kind of automobile-used carbon nanotube composite primer of the present invention and preparation thereof, using method, when using composite primer, only need composite primer be sprayed on non-metal workpiece, the mode of electrostatic spraying can be adopted again after drying to this compound coating spray paint, thus improve the service efficiency of finish paint, not only operate simple and easy, and can not cause interference to the color of finish paint, range of application is wider.Therefore, the present invention not only operates simple and easy, and is convenient to application.
Accompanying drawing explanation
Fig. 1 is the mass percent concentration of carbon nanotube when being 0.1wt.%, the outward appearance picture of the carbon nanotube compound coating that the composite primer that the present invention obtains is formed after spraying.
Fig. 2 is the scanned picture of carbon nanotube compound coating in Fig. 1.
Fig. 3 is the mass percent concentration of carbon nanotube when being 1.5wt.%, the scanned picture of the carbon nanotube compound coating that the composite primer that the present invention obtains is formed after spraying.
Embodiment
Illustrate that the present invention is further detailed explanation with embodiment below in conjunction with accompanying drawing.
See Fig. 1, Fig. 2 and Fig. 3, a kind of automobile-used carbon nanotube composite primer, comprises the conductive additive of vehicle paint base and inner doping thereof;
Described conductive additive is carbon nanotube, and this carbon nanotube is dispersed in vehicle paint base, and the mass percent concentration of carbon nanotube in composite primer is 0.1 – 1.5wt.%;
The surface resistance of the carbon nanotube compound coating that described composite primer is formed after spraying is 10
3– 10
9Ω/.
The mass percent concentration of described carbon nanotube in composite primer is 0.8wt.%; The surface resistance of the carbon nanotube compound coating that described composite primer is formed after spraying is 5 × 10
6Ω/.
Described carbon nanotube is single wall or multi-walled carbon nano-tubes; Described vehicle paint base is redix or acrylic resin.
A preparation method for above-mentioned automobile-used carbon nanotube composite primer, described preparation method comprises the following steps successively:
First carbon nanotube is joined in vehicle paint base to obtain mixture, again scatter operation is carried out to make carbon nanotube dispersed in vehicle paint base to this mixture, described carbon nanotube composite primer can be obtained after dispersed, in this composite primer, the mass percent concentration of carbon nanotube is 0.1 – 1.5wt.%, and the surface resistance of this composite primer carbon nanotube compound coating of formation after spraying is 10
3– 10
9Ω/.
Described scatter operation refers to ultrasonic disperse or Ball milling.
When described scatter operation is ultrasonic disperse, hyperacoustic size is 20 – 25Hz, and ultrasonic time is 60min.
State when described carbon nanotube joins vehicle paint base is Powdered or slurry.
A using method for above-mentioned automobile-used carbon nanotube composite primer, described using method comprises the following steps successively:
First described carbon nanotube composite primer is sprayed on non-metal workpiece to obtain carbon nanotube compound coating, after the drying of carbon nanotube compound coating, adopt the mode of electrostatic spraying to this compound coating spray paint again, to realize the electrostatic spraying of finish paint on non-metal workpiece.
The drying mode of described carbon nanotube compound coating is: dry 1h at 80 DEG C.
Principle of the present invention is described as follows:
At present, the conductive additive being applied to the top coat of nonmetal component mainly conducts electricity titanium white and carbon black, these conductive additives content in primers generally just can reach anlistatig effect at 10 – 30wt.%, usage quantity is very large, not only increase production cost and (especially conduct electricity titanium white, its unit price is higher), more crucially too much conductive additive can affect the color of priming paint, thus the color of the finish paint that restriction priming paint sprays, the color that the color of finish paint must push down priming paint could use, and greatly reduces its range of application.In addition, titanium white density of conducting electricity is about 4g/cm
3, and priming paint density is generally about 1g/cm
3the different easily layering of density, cause conduction titanium white not easily to disperse in primers, be difficult to mix, not only increase operation easier, and improve usage quantity, need to add a lot of conduction titanium whites and could realize electrostatic spraying, conduction titanium white is more, and it is larger on the impact of basecoat color, the interference of color is stronger, more can limit the use of finish paint.
For overcoming above defect, the invention provides a kind of automobile-used carbon nanotube composite primer and preparation thereof, using method, its core adds carbon nanotube in primers as conductive additive, after interpolation, carbon nanotube can form three-dimensional conductive network in composite primer, and this kind of three-dimensional conductive network can not only improve the specific conductivity of composite primer, makes its surface resistance meet the requirement of electrostatic spraying, the thermal conductivity of composite primer can also be improved simultaneously, thus improve the ageing resistance of composite primer.In addition, density and the priming paint density of carbon nanotube are close, carbon nanotube is not easily layering in primers, this is convenient to carbon nanotube in primers dispersed, more dispersed, and the unit addition of carbon nanotube is fewer, addition is fewer, more can reduce costs, more can avoid forming interference to the color of priming paint, also more can not hinder the use of finish paint, it can not form obstruction to the color of finish paint after all.
Embodiment 1:
A kind of automobile-used carbon nanotube composite primer, comprises the conductive additive of vehicle paint base and inner doping thereof; Described conductive additive is carbon nanotube, and this carbon nanotube is dispersed in vehicle paint base, and the mass percent concentration of carbon nanotube in composite primer is 0.1wt.%; The surface resistance of the carbon nanotube compound coating that described composite primer is formed after spraying is 10
9Ω/.
A kind of preparation method of above-mentioned automobile-used carbon nanotube composite primer, described preparation method comprises the following steps successively: first joined by carbon nanotube in vehicle paint base to obtain mixture, again scatter operation is carried out to make carbon nanotube dispersed in vehicle paint base to this mixture, can obtain described carbon nanotube composite primer after dispersed, in this composite primer, the mass percent concentration of carbon nanotube is 0.1wt.%.
A kind of using method of above-mentioned automobile-used carbon nanotube composite primer, described using method comprises the following steps successively: be first sprayed on by described carbon nanotube composite primer on non-metal workpiece to obtain carbon nanotube compound coating (see Fig. 1), after the drying of carbon nanotube compound coating, the surface resistance recording carbon nanotube compound coating with surface resistivity instrument is 10
9Ω/, meets electrostatic spraying requirement, and carbon nanotube compound coating smooth surface, has no obvious clustered particles, and in display compound coating, carbon nanotube dispersed is better.Carbon nanotube compound coating is observed with SEM, in coating, carbon nanotube dispersed evenly (Fig. 2), coatingsurface has no carbon nanotube, then adopts the mode of electrostatic spraying to this compound coating spray paint, thus on non-metal workpiece, realize the electrostatic spraying of finish paint.
Embodiment 2:
Substance is with embodiment 1, and difference is: the mass percent concentration of described carbon nanotube in composite primer is 0.8wt.%; The surface resistance of the carbon nanotube compound coating that described composite primer is formed after spraying is 5 × 10
6Ω/.
Embodiment 3:
Substance is with embodiment 1, and difference is: the mass percent concentration of described carbon nanotube in composite primer is 1.5wt.%; The surface resistance of the carbon nanotube compound coating that described composite primer is formed after spraying is 10
3Ω/.Observe carbon nanotube compound coating with SEM, in coating, evenly (Fig. 3), coatingsurface has no carbon nanotube to carbon nanotube dispersed.
Claims (9)
1. an automobile-used carbon nanotube composite primer, comprises the conductive additive of vehicle paint base and inner doping thereof, it is characterized in that:
Described conductive additive is carbon nanotube, and this carbon nanotube is dispersed in vehicle paint base, and the mass percent concentration of carbon nanotube in composite primer is 0.1 – 1.5wt.%;
The surface resistance of the carbon nanotube compound coating that described composite primer is formed after spraying is 10
3– 10
9Ω/.
2. the automobile-used carbon nanotube composite primer of one according to claim 1, is characterized in that: the mass percent concentration of described carbon nanotube in composite primer is 0.8wt.%; The surface resistance of the carbon nanotube compound coating that described composite primer is formed after spraying is 5 × 10
6Ω/.
3. the automobile-used carbon nanotube composite primer of one according to claim 1 and 2, is characterized in that: described carbon nanotube is single wall or multi-walled carbon nano-tubes; Described vehicle paint base is redix or acrylic resin.
4. a preparation method for automobile-used carbon nanotube composite primer according to claim 1, is characterized in that described preparation method comprises the following steps successively:
First carbon nanotube is joined in vehicle paint base to obtain mixture, again scatter operation is carried out to make carbon nanotube dispersed in vehicle paint base to this mixture, described carbon nanotube composite primer can be obtained after dispersed, in this composite primer, the mass percent concentration of carbon nanotube is 0.1 – 1.5wt.%, and the surface resistance of this composite primer carbon nanotube compound coating of formation after spraying is 10
3– 10
9Ω/.
5. the preparation method of a kind of automobile-used carbon nanotube composite primer according to claim 4, is characterized in that: described scatter operation refers to ultrasonic disperse or Ball milling.
6. the preparation method of a kind of automobile-used carbon nanotube composite primer according to claim 5, is characterized in that: when described scatter operation is ultrasonic disperse, and hyperacoustic size is 20 – 25Hz, and ultrasonic time is 60min.
7. the preparation method of a kind of automobile-used carbon nanotube composite primer according to claim 4, is characterized in that: state when described carbon nanotube joins vehicle paint base is Powdered or slurry.
8. a using method for automobile-used carbon nanotube composite primer according to claim 1, is characterized in that described using method comprises the following steps successively:
First described carbon nanotube composite primer is sprayed on non-metal workpiece to obtain carbon nanotube compound coating, after the drying of carbon nanotube compound coating, adopt the mode of electrostatic spraying to this compound coating spray paint again, to realize the electrostatic spraying of finish paint on non-metal workpiece.
9. the using method of a kind of automobile-used carbon nanotube composite primer according to claim 8, is characterized in that: the drying mode of described carbon nanotube compound coating is: dry 1h at 80 DEG C.
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|---|---|---|---|
| CN201410692570.1A CN104403397B (en) | 2014-11-26 | 2014-11-26 | Automobile-used CNT composite primer and its preparation, application method |
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|---|---|---|---|
| CN201410692570.1A CN104403397B (en) | 2014-11-26 | 2014-11-26 | Automobile-used CNT composite primer and its preparation, application method |
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| CN104403397B CN104403397B (en) | 2017-07-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106243941A (en) * | 2016-07-29 | 2016-12-21 | 东风商用车有限公司 | A kind of carbon system can spot welding electrically-conducting paint and preparation method thereof |
| CN107573779A (en) * | 2017-09-27 | 2018-01-12 | 芜湖春风新材料有限公司 | A kind of CNT electrostatic spraying priming paint, preparation method and applications |
| WO2022115004A1 (en) | 2020-11-30 | 2022-06-02 | Михаил Рудольфович ПРЕДТЕЧЕНСКИЙ | Priming composition for creating a light electrically conductive priming coating |
| CN115093741A (en) * | 2022-07-18 | 2022-09-23 | 常州光辉化工有限公司 | Carbon nanotube automobile coating self-repairing coating, coating and self-repairing method |
| WO2024058734A1 (en) * | 2022-09-14 | 2024-03-21 | Kanat Boyacilik Tic. Ve San. A.S. | A surface primer with light color and electrical conductivity for application to automotive plastic surfaces |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106243941A (en) * | 2016-07-29 | 2016-12-21 | 东风商用车有限公司 | A kind of carbon system can spot welding electrically-conducting paint and preparation method thereof |
| CN106243941B (en) * | 2016-07-29 | 2018-08-07 | 东风商用车有限公司 | A kind of carbon system can spot welding conductive coating and preparation method thereof |
| CN107573779A (en) * | 2017-09-27 | 2018-01-12 | 芜湖春风新材料有限公司 | A kind of CNT electrostatic spraying priming paint, preparation method and applications |
| WO2022115004A1 (en) | 2020-11-30 | 2022-06-02 | Михаил Рудольфович ПРЕДТЕЧЕНСКИЙ | Priming composition for creating a light electrically conductive priming coating |
| CN115093741A (en) * | 2022-07-18 | 2022-09-23 | 常州光辉化工有限公司 | Carbon nanotube automobile coating self-repairing coating, coating and self-repairing method |
| WO2024058734A1 (en) * | 2022-09-14 | 2024-03-21 | Kanat Boyacilik Tic. Ve San. A.S. | A surface primer with light color and electrical conductivity for application to automotive plastic surfaces |
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|---|---|
| CN104403397B (en) | 2017-07-28 |
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