CN109749563A - A kind of PP material bumper electrostatic spraying dark-grey conductive primer and preparation method thereof - Google Patents
A kind of PP material bumper electrostatic spraying dark-grey conductive primer and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of PP material bumper electrostatic spraying dark-grey conductive primers and preparation method thereof, it comprises the following components in parts by weight: the acrylic resin modified 15-25 of chloridized polyolefin, chlorinated polyolefin resin liquid 7-20, ordinary titanium powder 3-8, conductive titanium dioxide 3-8, conductive black 0.8-1.5, fumed silica 0.5-1.5, solvent 40-55, dispersing agent 0.1-1.5, levelling agent 0.05-0.1.Compared with prior art, primer dry films resistance value≤0.5M Ω/cm of the present invention2, 0 grade (cross-hatching, 100% nothing fall off) is reached to the adhesive force of ground, both the requirement of electrostatic spraying technique had been met, has also ensured the good adhesion to PP ground, simultaneously, impact resistance, resistance to acid and alkali etc. are had excellent performance, and preparation method is simple, easily operated.
Description
Technical field
The present invention relates to automobile water paint fields, and in particular to the dark-grey conductive primer of PP material bumper electrostatic spraying and
Preparation method.
Background technique
Now, our living environment is worsening, seriously affects people's lives quality.Government department is also gradually increased
To environmental protection dynamics.And in bumper manufacture, coating factory, using first beating PP water, in the spraying for carrying out background color, finishing coat,
But the efficiency of air gun spraying is 20%~30%, causes the waste of resource and the huge pollution of environment.To improve work efficiency,
Start using electrostatic spraying.50%~70% can reach for background color, finishing coat and electrostatic rotating cup spray efficiency, therefore electrostatic rotating cup sprays
25%~40% can be improved for the utilization rate of coating relative to traditional air gun spraying by applying, to efficiently reduce coating
Consumption, reduce production cost, while reducing the bicycle discharge amount of VOC, reducing pollution of the painting to environment.But due to PP
Material is non-conducting material, is not directly applicable electrostatic spraying, and traditional conductive plastics is expensive, is not suitable for automobile work
The mass production of industry, for this purpose, applying conductive priming paint becomes the master of auto industry plastic part electrostatic painting process on plastic part
Stream.
Patent CN104109427B discloses PP material bumper electrostatic spraying light gray conductive primer and preparation method thereof, institute
Stating electrostatic spraying conductive primer includes following component: conductive titanium dioxide, conductive metal powder, electrically conductive graphite, conductive carbon black, swelling
Soil paste, dispersing agent, acrylic resin modified, chlorinated polyolefin resin liquid, levelling agent, dimethylbenzene, toluene, butyl acetate, alkyd
Secondary butyl ester and conductive agent.The PP material bumper electrostatic spraying light gray conductive primer of the invention, one time 8~10 μm of coating film thickness,
Dry film resistance value≤1M Ω/cm2, 0 grade (cross-hatching, 100% nothing fall off) is reached to the adhesive force of ground, both meets electrostatic coat
Technique requirement is filled, also ensures the good adhesion to PP ground, this patent mainly applies conductive metal powder as conductive carrier,
Other conductive materials are as auxiliary material, and common conductive metal powder has copper powder, silver powder, a nickel powder in coating, but silver powder and nickel
Powder is expensive, thus copper powder in conductive coating more commonly.The electrical conduction mechanism of conductive metal powder: equably by conductive metal powder
It is mixed into the resin of insulation, conductive metal powder must be in contact with each other or close to that could form wireless link in the coating, make coating
Has the function of electron channel.When only conductive metal powder has enough amounts in coating, it just can be coated conductive, but lead
For the initial size of electric metal powder generally at 0.1-1 micron, specific surface area about 10 ㎡/g cause dispersing agent to be difficult to adsorb, and resin is difficult
With package.But the conductive primer uses, four kinds of conductive materials are mixed, at high cost, process is more, and conductive effect compared with
Difference, stability is poor, and impact resistance, water resistance are also poor.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of good conductivities, resistance to punching
The strong PP material bumper electrostatic spraying dark-grey conductive primer and preparation method thereof of hitting property, resistance to acid and alkali.
The purpose of the present invention can be achieved through the following technical solutions: a kind of PP material bumper electrostatic spraying is led with dark-grey
Electric priming paint, which is characterized in that comprise the following components in parts by weight:
The acrylic resin modified 15-25 of chloridized polyolefin,
Chlorinated polyolefin resin liquid 7-20,
Ordinary titanium powder 3-8,
Conductive titanium dioxide 3-8,
Conductive black 0.8-1.5,
Fumed silica 0.5-1.5,
Solvent 40-55,
Dispersing agent 0.1-1.5,
Levelling agent 0.05-0.1.
The chloridized polyolefin is acrylic resin modified be cyclic ether compound in the presence of, make containing having a hydroxyl
The chloridized polyolefin tree resin that the monomer mixture of the acrylate monomer of base and other vinyl monomers and acid are modified is grafted
Copolymerization.
The acrylic resin modified chloridized polyolefin is from commercially available Jiaxiang ZJ-410.
The chlorinated polyolefin resin liquid is selected from the CP 343-1 of commercially available Yi Siman.
The conductive titanium dioxide is needle-like conductive titanium dioxide, acicular titanium dioxide surface-coating SnO2/ Sb conductive layer
A kind of white conductive material product, L value are 90-95.
The conductive black is a kind of high-graphitized carbon black, partial size 20-40nm.
The fumed silica be micron order fumed silica and nano grade gas phase silicon dioxide in mass ratio
The mixture of 1:1, the partial size of the micron order fumed silica are 20-60 μm, the grain of the nano grade gas phase silicon dioxide
Diameter is 50-100nm.
The solvent is the mixed mixture of dimethylbenzene and n-butyl acetate 1:1~3 in mass ratio.
A kind of preparation method of the dark-grey conductive primer of PP material bumper electrostatic spraying, which is characterized in that including following several
A step:
(1) acrylic resin modified chloridized polyolefin, dispersing agent and partial solvent are weighed by formula, with dispersion machine high speed point
5-15min is dissipated, speed 800-1000r/min is stirred, then sequentially adds ordinary titanium powder, conductive titanium dioxide, conductive black, gas phase
Silica continues 20~30min of stirring, mixing speed 2000r/min, and it is micro- to be then ground to fineness≤10 with sand mill
Rice filters and component A is made；
(2) chlorinated polyolefin resin liquid, levelling agent, residual solvent are added in component A, stir evenly and is led to get to PP
Electric priming paint.
The solvent of step (1) described addition is the 60~80% of solvent total weight.
Compared with prior art, the invention has the following advantages that
1.PP plastic bottom material due to low polarity, low-surface-energy, non-porous characteristic, common film its surface adhesion force very
Difficulty reaches, and chlorinated polyolefin resin has excellent adhesive force on PP ground.Chlorinated polyolefin resin and other resin miscibles
Property is poor, causes the storage characteristics of coating system poor.According to similar compatibility principle, by chloridized polyolefin is acrylic resin modified can be with
Chlorinated polyolefin resin reaches good compatibility.It is cyclic ether chemical combination that it is acrylic resin modified, which to provide chloridized polyolefin, by the present invention
In the presence of object, make the monomer mixture and acid of acrylate monomer and other vinyl monomers containing having 1 hydroxyl
Modified chloridized polyolefin tree resin section Zhi Gongju.
2. to make dry film coating conductive, it is necessary to conductive materials be added: such as conductive metal powder, mica, graphite, stone
Black alkene, conductive barium sulfate, conductive black, conductive titanium dioxide.PP conduction is made using conductive black and conductive titanium dioxide in the present invention
Priming paint.The present invention uses needle-like conductive titanium dioxide, a kind of white of acicular titanium dioxide surface-coating SnO2/Sb conductive layer
Conductive material product.Because there is additive amount more less than bulbous-style product, can be obtained ideal conduction in needle-shaped
Property.Meanwhile reinforcing effect is also preferable.The acicular titanium dioxide of its bottom is not easily broken compared with other fibrous materials, and is dispersed
Intensity and the variation that generates is small, stable conductivity.Because of its special surface treatment, not only electrical efficiency is high for it, the L value of powder
Also it in 90-95, can freely match colors.The present invention is a kind of high-graphitized carbon black using conductive black, this graphited
Conductive black partial size is very tiny (20-40nm), therefore the number of particles in unit volume increases and resistance reduces,
It may be said that having preferable conductive capability.
3. the fumed silica different there are two types of partial size is also added in inventive formulation, with chloridized polyolefin modified propylene
Acid resin collective effect can improve the impact resistance of priming paint, and fast drying, resistance toization while improving the adhesive force of priming paint
It is strong to learn performance.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Following embodiment each component is parts by weight of component
Embodiment 1
(1) formula of PP plastic cement primer is as follows:
| Material name | Weight |
| Modified propylene resin (Jiaxiang ZJ-410) | 21 |
| Dispersing agent | 1.3 |
| Dimethylbenzene | 15 |
| N-butyl acetate | 20 |
| Ordinary titanium powder | 5 |
| Conductive titanium dioxide | 3 |
| Conductive black | 1.3 |
| Fumed silica | 0.5 |
| CP 343-1 | 7.7 |
| N-butyl acetate | 25 |
| Levelling agent | 0.2 |
(2) preparation process
1) be added in a stirring kettle in formula (Jiaxiang ZJ-410) acrylic resin modified, dispersing agent, dimethylbenzene, acetic acid
N-butyl, mixing speed is that 800-1000r/min is stirred 5-10 minutes, then by the ordinary titanium powder in formula, conductive titanium white
Powder, fumed silica, sequentially adds in above-mentioned dispersion liquid conductive black.Mixing speed is that 2000r/min stirs 20-
30min, fineness of grind≤10 micron filter and component A are made.
2) CP343-1, levelling agent, solvent are added in component A, are stirred evenly to get PP conductive primer is arrived.
Gained primer performance is as follows:
| Detection project | Detection method | Performance |
| Fineness | 25 μm of fineness scraper plates | ≤10μm |
| Viscosity/20 DEG C | Apply -4 flow cups | 18~25 seconds |
| Specific gravity/20 DEG C | Hydrometer jar | 0.98±0.02g/cm3 |
| It is depot | Without precipitating, agglomeration, layering | Without precipitating, agglomeration, layering |
| Adhesive force | Single layer 1mm, composite coating 2mm | 0~1 grade |
| Dry film resistance value | ≤1.0MΩ/cm2 | ≤0.5MΩ/cm2 |
| Impact | Domestic Apparatus for Impacting at low-temp | 500g×50cm |
| Flexibility | Diameter 10mm cylinder | Without cracking |
| Acid resistance | 0.1N sulfuric acid * is for 24 hours | Without expansion, corrugation, blistering |
| Alkali resistance | 0.1N NaOH*24h | Without expansion, corrugation, blistering |
| Heatproof is aqueous | 40℃*240h | Without expansion, corrugation, blistering |
Sample making:
(1) 8~10 μm of PP conductive primer coating film thickness is stored at room temperature 15 minutes；
(2) 15~25 μm of the mating colored paint film thickness of coating stands 5 minutes；
(3) 30~35 μm of the mating varnish film thickness of coating is stored at room temperature 15 minutes, and 80 DEG C are toasted 30 minutes.
The dark-grey conductive primer of PP material bumper electrostatic spraying, one time 8~10 μm of coating film thickness, dry film resistance value≤0.5M
Ω/cm2, 0 grade (cross-hatching, 100% nothing fall off) is reached to the adhesive force of ground, had both met the requirement of electrostatic spraying technique,
It ensure that the good adhesion to PP ground, meanwhile, impact resistance, resistance to acid and alkali etc. are had excellent performance, and preparation method is simple, are easy to
Operation.
Embodiment 2
(1) formula of PP plastic cement primer is as follows:
(2) preparation process
1) be added in a stirring kettle in formula (Jiaxiang ZJ-410) acrylic resin modified, dispersing agent, dimethylbenzene, acetic acid
N-butyl, mixing speed is that 800-1000r/min is stirred 5-10 minutes, then by the ordinary titanium powder in formula, conductive titanium white
Powder, fumed silica, sequentially adds in above-mentioned dispersion liquid conductive black.Mixing speed is that 2000r/min stirs 20-
30min, fineness of grind≤10 micron filter and component A are made.
2) CP343-1, levelling agent, solvent are added in component A, are stirred evenly to get PP conductive primer is arrived.
Gained primer performance is as follows:
Sample making:
(1) 8~10 μm of PP conductive primer coating film thickness is stored at room temperature 15 minutes；
(2) 15~25 μm of the mating colored paint film thickness of coating stands 5 minutes；
(3) 30~35 μm of the mating varnish film thickness of coating is stored at room temperature 15 minutes, and 80 DEG C are toasted 30 minutes.
The dark-grey conductive primer of PP material bumper electrostatic spraying, one time 8~10 μm of coating film thickness, dry film resistance value≤0.4M
Ω/cm2, 0 grade (cross-hatching, 100% nothing fall off) is reached to the adhesive force of ground, had both met the requirement of electrostatic spraying technique,
It ensure that the good adhesion to PP ground, meanwhile, impact resistance, resistance to acid and alkali etc. are had excellent performance, and preparation method is simple, are easy to
Operation.
Embodiment 3
(1) formula of PP plastic cement primer is as follows:
(2) preparation process
1) be added in a stirring kettle in formula (Jiaxiang ZJ-410) acrylic resin modified, dispersing agent, dimethylbenzene, acetic acid
N-butyl, mixing speed is that 800-1000r/min is stirred 5-10 minutes, then by the ordinary titanium powder in formula, conductive titanium white
Powder, fumed silica, sequentially adds in above-mentioned dispersion liquid conductive black.Mixing speed is that 2000r/min stirs 20-
30min, fineness of grind≤10 micron filter and component A are made.
2) CP343-1, levelling agent, solvent are added in component A, are stirred evenly to get PP conductive primer is arrived.
Gained primer performance is as follows:
| Detection project | Detection method | Performance |
| Fineness | 25 μm of fineness scraper plates | ≤10μm |
| Viscosity/20 DEG C | Apply -4 flow cups | 19~23 seconds |
| Specific gravity/20 DEG C | Hydrometer jar | 0.97±0.02g/cm3 |
| It is depot | Without precipitating, agglomeration, layering | Without precipitating, agglomeration, layering |
| Adhesive force | Single layer 1mm, composite coating 2mm | 0 grade |
| Dry film resistance value | ≤1.0MΩ/cm2 | ≤0.45MΩ/cm2 |
| Impact | Domestic Apparatus for Impacting at low-temp | 500g×50cm |
| Flexibility | Diameter 10mm cylinder | Without cracking |
| Acid resistance | 0.1N sulfuric acid * is for 24 hours | Without expansion, corrugation, blistering |
| Alkali resistance | 0.1N NaOH*24h | Without expansion, corrugation, blistering |
| Heatproof is aqueous | 40℃*240h | Without expansion, corrugation, blistering |
Sample making:
(1) 8~10 μm of PP conductive primer coating film thickness is stored at room temperature 15 minutes；
(2) 15~25 μm of the mating colored paint film thickness of coating stands 5 minutes；
(3) 30~35 μm of the mating varnish film thickness of coating is stored at room temperature 15 minutes, and 80 DEG C are toasted 30 minutes.
The dark-grey conductive primer of PP material bumper electrostatic spraying, one time 8~10 μm of coating film thickness, dry film resistance value≤
0.45MΩ/cm2, 0 grade (cross-hatching, 100% nothing fall off) is reached to the adhesive force of ground, electrostatic spraying technique had both been met and has wanted
It asks, also ensures the good adhesion to PP ground, meanwhile, impact resistance, resistance to acid and alkali etc. are had excellent performance, preparation method letter
It is single, it is easily operated.
Claims (10)
1. a kind of dark-grey conductive primer of PP material bumper electrostatic spraying, which is characterized in that comprise the following components in parts by weight:
The acrylic resin modified 15-25 of chloridized polyolefin,
Chlorinated polyolefin resin liquid 7-20,
Ordinary titanium powder 3-8,
Conductive titanium dioxide 3-8,
Conductive black 0.8-1.5,
Fumed silica 0.5-1.5,
Solvent 40-55,
Dispersing agent 0.1-1.5,
Levelling agent 0.05-0.1.
2. the dark-grey conductive primer of PP material bumper electrostatic spraying according to claim 1, which is characterized in that the chlorine
In the presence of changing polyolefin modified acrylic resin and being cyclic ether compound, make containing the acrylate monomer with a hydroxyl
The modified chloridized polyolefin tree resin graft copolymerization with the monomer mixture and acid of other vinyl monomers.
3. the dark-grey conductive primer of PP material bumper electrostatic spraying according to claim 1 or 2, which is characterized in that described
Chloridized polyolefin it is acrylic resin modified for from commercially available Jiaxiang ZJ-410.
4. the dark-grey conductive primer of PP material bumper electrostatic spraying according to claim 1, which is characterized in that the chlorine
Change the CP 343-1 that polyolefin resin liquid is selected from commercially available Yi Siman.
5. the dark-grey conductive primer of PP material bumper electrostatic spraying according to claim 1, which is characterized in that described leads
Electric titanium dioxide is needle-like conductive titanium dioxide, acicular titanium dioxide surface-coating SnO2A kind of white conductive material of/Sb conductive layer
Product, L value are 90-95.
6. the dark-grey conductive primer of PP material bumper electrostatic spraying according to claim 1, which is characterized in that described leads
Electric carbon black is a kind of high-graphitized carbon black, partial size 20-40nm.
7. the dark-grey conductive primer of PP material bumper electrostatic spraying according to claim 1, which is characterized in that the gas
Aerosil is the mixture of 1:1 in mass ratio of micron order fumed silica and nano grade gas phase silicon dioxide, described
The partial size of micron order fumed silica is 20-60 μm, and the partial size of the nano grade gas phase silicon dioxide is 50-100nm.
8. the dark-grey conductive primer of PP material bumper electrostatic spraying according to claim 1, which is characterized in that described is molten
Agent is the mixed mixture of dimethylbenzene and n-butyl acetate 1:1~3 in mass ratio.
9. a kind of preparation method of the dark-grey conductive primer of PP material bumper electrostatic spraying as described in claim 1~8 is any,
It is characterized in that, including the following steps:
(1) acrylic resin modified chloridized polyolefin, dispersing agent and partial solvent are weighed by formula, with dispersion machine high speed dispersion 5-
15min stirs speed 800-1000r/min, then sequentially adds ordinary titanium powder, conductive titanium dioxide, conductive black, gas phase dioxy
SiClx, continues 20~30min of stirring, then mixing speed 2000r/min is ground to fineness≤10 micron, mistake with sand mill
It filters and component A is made；
(2) chlorinated polyolefin resin liquid, levelling agent, residual solvent are added in component A, are stirred evenly to get PP conduction bottom is arrived
Paint.
10. preparation method of a kind of PP material bumper electrostatic spraying with dark-grey conductive primer according to claim 9, feature
It is being, the solvent of step (1) described addition is the 60~80% of solvent total weight.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811625192.XA CN109749563A (en) | 2018-12-28 | 2018-12-28 | A kind of PP material bumper electrostatic spraying dark-grey conductive primer and preparation method thereof |
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Cited By (2)
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| CN115717010A (en) * | 2022-12-26 | 2023-02-28 | 天津科瑞达涂料化工有限公司 | Light-colored waterborne conductive PP primer for automobile bumpers and application thereof |
| CN115926541A (en) * | 2022-11-04 | 2023-04-07 | 广东安捷伦新材料科技有限公司 | Flame-treatment-free PP primer and preparation method and application thereof |
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| CN115717010A (en) * | 2022-12-26 | 2023-02-28 | 天津科瑞达涂料化工有限公司 | Light-colored waterborne conductive PP primer for automobile bumpers and application thereof |
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