CN104004448B - A kind of one pack system cathode electrophoresis dope for vehicle paint base - Google Patents
A kind of one pack system cathode electrophoresis dope for vehicle paint base Download PDFInfo
- Publication number
- CN104004448B CN104004448B CN201410184005.4A CN201410184005A CN104004448B CN 104004448 B CN104004448 B CN 104004448B CN 201410184005 A CN201410184005 A CN 201410184005A CN 104004448 B CN104004448 B CN 104004448B
- Authority
- CN
- China
- Prior art keywords
- cathode electrophoresis
- electrophoresis
- electrophoresis dope
- pack system
- epoxy resin
- 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.)
- Expired - Fee Related
Links
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention belongs to electrophoretic coating technical field, a kind of one pack system cathode electrophoresis dope for vehicle paint base.This cathode electrophoresis dope is characterised by including the composition of following percentage by weight: film forming binder 40% 50%, coalescents 0.1% 1%, defoamer 0.05% 0.5%, titanium dioxide 15% 25%, Pulvis Talci 10% 20%, deionized water add to 100%.Use the semiclosed MDI of cationic to make electrophoresis that firming agent brings in order to overcome firming agent and resin alloy technique is coated with film component and proportioning is unstable, the problem such as electrophoresis groove liquid stability is the best, easy layering, can reduce cost minimizing toxicity simultaneously；During electrophoresis painting dressing, the resin of cation group can change at surface of the work generation hydrophilic-hydrophobic, increase blocked isocyanate water dispersible and altogether swimming property, the problem brought with resin alloy technique efficiently against firming agent.
Description
Technical field
The invention belongs to electrophoretic coating technical field, a kind of one pack system ability cathode electrophoresis for vehicle paint base is coated with
Material.
Background technology
Electrophoretic coating is the water paint that a class is only applicable to electrophoretic painting, and it is dissociable in water becomes film-formable water
Dissolubility film forming matter, swims to contrary electrode in DC electric field, and gets off to form film deposited above, water-soluble according to dissociate
Property film forming matter polarity different, anode electrophoresis dope and cathode electrophoresis dope two class can be divided into.
There is anodised shortcoming, meeting acid gilding metal surface (in addition to aluminum and torpescence metal) in anode electrophoresis dope, makes
It tarnishes, therefore anode electrophoresis dope the most only makees anti-corrosion primer, it is impossible to meet the requirement of incrustation.People are in 20th century
Have developed corrosion resisting property the beginning of the seventies higher and there is the cathode electrophoresis dope of decorative effect.
Compared with traditional solvent based coating and other dip-coating, spraying watersoluble baking paint, cathode electrophoresis dope has can not
The superiority of analogy: 1, with water as solvent, safety is good；2, the industrial coating line of large-scale production, high financial profit it are suitable for；
3, coating is fine and close, thickness uniform, controllable, and wet film moisture content is low, improves work efficiency；4, coating is uniformly；5, the solid content of working solution is low
(10-20%), carry-over loss is little, and coating process parameter is prone to adjust, and coating quality is stable.
The epoxy resin of fine corrosion resistance often selected by general electrophoretic coating resin, containing many hydroxyls and ether
Key, has fabulous cohesive force to metal, and paint film is tough and tensile, chemical-resistant is excellent, corrosion resistance is strong, is suitable for priming paint, but shortcoming
Being that internal stress is big after solidification, matter is hard and crisp, and pliability is the best, the most high defect of gloss to cause this series products generally to exist.Therefore
The research being modified cathode electrophoresis dope epoxy resin is paid attention to widely.
Epoxy-silicone resin, as a kind of new modified epoxy resin, is with epoxy resin as skeleton, is connect by organosilicon
Branch is to the modified resin of the epoxy resin end of the chain.The grafting of silicone segments improve the hydrophobicity of epoxy resin, weatherability and
High and low temperature resistance.The polydimethylsiloxane--modified Study On O-cresol Epoxy Resin such as Hou Qingpu so that it is internal stress is significantly
Reduce, cracking resistance index greatly improves.Lu Zhaoling etc. use the reactive silicone oligomer contracting that epoxy resin is good with compatibility
Poly-, prepare epoxy modified silicone resin, the advantage having epoxy resin and organic siliconresin concurrently, not only increase thermostability, and
And there are good anti-corrosive properties.
Summary of the invention
The present invention is just for above technical problem, it is provided that a kind of employing organic silicone oil and organic amine modified epoxy,
Add cationic blocked isocyanate curing agent, in organic acid and after, make film forming binder, in deionized water add help
Agent, pigment and filler etc. are configured to organic-silicon-modified Epoxy Cathodic Electrodeposition Coating, i.e. for the one pack system negative electrode of vehicle paint base
The automobile bottom coating film of excellent performance can be prepared after electrophoretic coating, its electrophoretic painting and solidification.
The concrete technical scheme of the present invention is as follows:
A kind of one pack system cathode electrophoresis dope for vehicle paint base, including the composition of following percentage by weight:
As preferably, a kind of one pack system cathode electrophoresis dope for vehicle paint base, including the one-tenth of following percentage by weight
Point:
Further preferred, for the one pack system cathode electrophoresis dope of vehicle paint base, including the one-tenth of following percentage by weight
Point:
One pack system cathode electrophoresis dope for vehicle paint base described above, conventional method can be used to prepare can also
Employing following steps are prepared:
1) synthesis of semiclosed MDI
MDI and a small amount of catalyst are joined in the four-hole bottle with thermometer, agitator and separatory funnel, is warming up to 40
DEG C, insulated and stirred 30min；Again ethylene glycol monoethyl ether and epsilon-caprolactams are joined in reaction system by separatory funnel, rise
Temperature is to 70 DEG C, and isothermal reaction 2h, end reaction obtains semi-enclosed MDI；
2) synthesis of modifying epoxy resin by organosilicon
In the four-hole bottle with thermometer, agitator and condenser, add ethylene glycol monobutyl ether, be warming up to 80 DEG C, then add
Enter epoxy resin, be warming up to 120-130 DEG C, make epoxy resin all dissolve；It is cooled to 80 DEG C, adds organic silicone oil and be warming up to
90-100 DEG C, stirring reaction 2h；It is cooled to 80 DEG C, adds diethanolamine, be warming up to 90-100 DEG C, insulated and stirred 2h；Lower the temperature again
To 80 DEG C, add semi-enclosed MDI, be warming up to 110 DEG C, insulated and stirred 2.5h；It is cooled to 70 DEG C, adds lactic acid neutralization, continue
Insulated and stirred 0.5h, stopped reaction；Add lactic acid and deionized water in the reactive mixture, stir 1-with emulsification pretreatment blender
2h, obtains film forming binder；
3) formula of cathode electrophoresis dope stock solution, is calculated as with weight/mass percentage composition:
4) electrophoresis process
First the cathode electrophoresis dope stock solution high speed dispersor containing modifying epoxy resin by organosilicon is stirred, join
In electrophoresis tank, being slowly added to deionized water and being diluted to solid content is 18%, filters, and with the pH value of acetic acid regulation tank liquor to 5.0, uses
High speed dispersor stirs 24 hours, obtains directly carrying out the coating emulsion of electrophoresis experiment.Anode is done, to pass through with corrosion resistant plate
Defat, the tinplate after phosphatization was required for before following operation is carried out as negative electrode, coated article iron plate before electro-deposition
Process: sand papering → oil removing → washing → rust cleaning → washing → neutralization → washing → phosphatization (room temperature) → wash → dry up, put
Enter exsiccator to preserve.Electrophoretic voltage is 150V, and electrophoresis time is 3 minutes, after electrophoresis terminates, takes out negative electrode iron plate and first uses tap water
Remove the paint liquid of remaining surface, then with distilled water flushing, solidify 30 minutes at 180 DEG C, prepare cathode electrophoresis dope paint film, and
Carry out performance test.
Described catalyst is the ethylene glycol monoethyl ether solution containing 10% dibutyl tin dilaurate, and addition is MDI matter
The 0.5% of amount,.Described epoxy resin is bisphenol A type epoxy resin, and epoxide number is 0.44, and epoxide equivalent is 210-244, point
Son amount is 426-488, and softening point is 15-23 DEG C.Described organic silicone oil is organosiloxane monomer 1706.Described film forming helps
Agent is the Texanol of Yi Si Man of the U.S..Described defoamer is the BYK-028 of Bi Ke chemical company.Described titanium dioxide
For titanium dioxide TR-92, Pulvis Talci a size of 600 mesh.
The positive effect of the present invention is embodied in:
(1), the semiclosed MDI of cationic is used to make firming agent in order to overcome firming agent and resin alloy technique to bring
It is unstable that electrophoresis is coated with film component and proportioning, the problem such as electrophoresis groove liquid stability is the best, easy layering, can reduce cost simultaneously and reduce
Toxicity.
(2), the resin of cation group can change at surface of the work generation hydrophilic-hydrophobic during electrophoresis painting dressing, increases
Blocked isocyanate water dispersible and altogether swimming property, the problem brought with resin alloy technique efficiently against firming agent.
(3), compared with TDI, MDI not only low price and also toxicity is little, use cation-modified MDI to make firming agent energy
Enough be effectively reduced the cost of coating, and producing, work progress is pollution-free generation, beneficially industrial safety protection.
Accompanying drawing explanation
Fig. 1 is silicon-modified epoxy cathode electrophoresis dope preparation technology schematic flow sheet；
Fig. 2 is silicon-modified epoxy cathode electrophoresis dope sample preparation technology schematic flow sheet.
Fig. 3 is the MDI infrared spectrogram after closing
Detailed description of the invention
The one pack system cathode electrophoresis dope for vehicle paint base in the present invention, including the composition of following percentage by weight:
As preferably, this is used for the one pack system cathode electrophoresis dope of vehicle paint base, including the composition of following percentage by weight:
This is used for the one pack system cathode electrophoresis dope of vehicle paint base, it is also possible to the most preferably according to following weight percent
The composition of ratio carries out proportioning:
For the one pack system cathode electrophoresis dope of vehicle paint base, following steps can be used to be prepared:
1) synthesis of semiclosed MDI
MDI and a small amount of catalyst are joined in the four-hole bottle with thermometer, agitator and separatory funnel, is warming up to 40
DEG C, insulated and stirred 30min；Again ethylene glycol monoethyl ether and epsilon-caprolactams are joined in reaction system by separatory funnel, rise
Temperature is to 70 DEG C, and isothermal reaction 2h, end reaction obtains semi-enclosed MDI；
2) synthesis of modifying epoxy resin by organosilicon
In the four-hole bottle with thermometer, agitator and condenser, add ethylene glycol monobutyl ether, be warming up to 80 DEG C, then add
Enter epoxy resin, be warming up to 120-130 DEG C, make epoxy resin all dissolve；It is cooled to 80 DEG C, adds organic silicone oil and be warming up to
90-100 DEG C, stirring reaction 2h；It is cooled to 80 DEG C, adds diethanolamine, be warming up to 90-100 DEG C, insulated and stirred 2h；Lower the temperature again
To 80 DEG C, add semi-enclosed MDI, be warming up to 110 DEG C, insulated and stirred 2.5h；It is cooled to 70 DEG C, adds lactic acid neutralization, continue
Insulated and stirred 0.5h, stopped reaction；Add lactic acid and deionized water in the reactive mixture, stir 1-with emulsification pretreatment blender
2h, obtains film forming binder；
3) formula of cathode electrophoresis dope stock solution, mixes according to above proportioning；
4) electrophoresis process
First the cathode electrophoresis dope stock solution high speed dispersor containing modifying epoxy resin by organosilicon is stirred, join
In electrophoresis tank, being slowly added to deionized water and being diluted to solid content is 18%, filters, and with the pH value of acetic acid regulation tank liquor to 5.0, uses
High speed dispersor stirs 24 hours, obtains directly carrying out the coating emulsion of electrophoresis experiment.Anode is done, to pass through with corrosion resistant plate
Defat, the tinplate after phosphatization was required for before following operation is carried out as negative electrode, coated article iron plate before electro-deposition
Process: sand papering → oil removing → washing → rust cleaning → washing → neutralization → washing → phosphatization (room temperature) → wash → dry up, put
Enter exsiccator to preserve.Electrophoretic voltage is 150V, and electrophoresis time is 3 minutes, after electrophoresis terminates, takes out negative electrode iron plate and first uses tap water
Remove the paint liquid of remaining surface, then with distilled water flushing, solidify 30 minutes at 180 DEG C, prepare cathode electrophoresis dope paint film, and
Carry out performance test.
Described catalyst is the ethylene glycol monoethyl ether solution containing 10% dibutyl tin dilaurate.Addition is MDI matter
The 0.5% of amount, described epoxy resin is bisphenol A type epoxy resin, and epoxide number is 0.44, and epoxide equivalent is 210-244, molecule
Amount is 426-488, and softening point is 15-23 DEG C.Described organic silicone oil is organosiloxane monomer 1706.Described coalescents
Texanol for Yi Si Man of the U.S..Described defoamer is the BYK-028 of Bi Ke chemical company.Described titanium dioxide is
Titanium dioxide TR-92, Pulvis Talci a size of 600 mesh.
Research shows, at the small molecule active group that macromolecular compound segment terminal graft is appropriate, on the one hand can carry
The reactivity again of high material, does not interferes with again the physical property of material itself simultaneously.The modified resin of introducing-NCO group exists
It is greatly improved in performance.1, on hydrophobicity be improved significantly；2, than the most averagely improving a level on adhesive force
Not；3, salt water resistance etching time is long.
Isocyanates contains-NCO group, and reactivity is relatively big, can relatively easily with the hydroxyl in epoxy resin or ring
Epoxide is reacted, but toxicity is bigger.Use the isocyanates closed make its-NCO group is in closed state.Close-NCO group
On the one hand and the active hydrogen reaction on resin segment at high temperature can unseal, dissociate active-NCO group, it is achieved point
Cross-link (Fig. 1) between son, thus play the effect improving paint film property；On the other hand dissociate-NCO group penetrates into asphalt mixtures modified by epoxy resin
Between fat and protected seam, react with a small amount of water therein, generate the urea bond higher with metal surface absorption affinity.Use
Cationic is closed MDI firming agent and can be coated with film component efficiently against the electrophoresis that firming agent and resin alloy technique are brought and join
Than shortcomings such as instability, electrophoresis groove liquid stability is the best, easy layerings, and can drop and be realized with a low cost green coating target.
Further preferred, the formula of cathode electrophoresis dope stock solution is: film forming binder (solid content 40%), coalescents,
The mass ratio of defoamer, titanium dioxide, Pulvis Talci and deionized water is 45:0.5:0.2:20:15:100；Electrophoresis process is 150V
With 3 minutes.
For the technological means making the present invention realize, inventive features, reach purpose and be easy to understand with effect, below knot
Conjunction instantiation describes the present invention.
Embodiment 1:
Semiclosed MDI used in example below, is by 1 in aforementioned synthesis) liquid for preparing of step.Film forming binder,
The preparation method of modifying epoxy resin by organosilicon and electrophoresis process method are as aforesaid 2 respectively), 3) and 4) method described in step enters
OK.
(1) formula
| Title | Specification | Quality divides content in vain |
| Film forming binder | Solid content 40% | 40 |
| Coalescents | Chemical pure | 0.3 |
| Defoamer | Chemical pure | 0.1 |
| Titanium dioxide | Technical grade | 15 |
| Pulvis Talci | Technical grade | 18 |
| Deionized water | Electrical conductivity < 15 μ s/cm | 100 |
(2) electrophoresis process
Anode is done with corrosion resistant plate, with the tinplate after defat, phosphatization as negative electrode, electrophoresis three points under 150V
Clock, washing, toast 30 minutes at 180 DEG C.Coated article iron plate was required for carrying out through following operation before electro-deposition
Pre-treatment: sand papering → oil removing → washing → rust cleaning → washing → neutralization → washing → phosphatization (room temperature) → wash → dry up,
Put into exsiccator to preserve.First organic-silicon-modified Epoxy Cathodic Electrodeposition Coating stock solution is stirred before electrophoresis, take a certain amount of adding
Enter the pH to 5.0 with acetic acid regulation tank liquor, electromagnetic agitation in electrophoresis tank.
(3) paint film property
| Project | Performance |
| Appearance | Smooth even |
| Thickness/μm | 20-25 |
| Hardness | 3H |
| Adhesive force | 1-2 |
| Resistant to acetone | >120h |
| Resistance to 5%H2SO4 | >48h |
| Resistance to 5%NaOH | >240h |
| Resistance to 3%NaCl | >240h |
| Resistance to water | 480h |
| Resistance to impact/cm | ≥50 |
| Pliability/mm | ≤1 |
Embodiment 2
(1) formula
| Title | Specification | Mass fraction |
| Film forming binder | Solid content 40% | 40 |
| Coalescents | Chemical pure | 0.3 |
| Defoamer | Chemical pure | 0.1 |
| Titanium dioxide | Technical grade | 16 |
| Pulvis Talci | Technical grade | 17 |
| Deionized water | Electrical conductivity < 15 μ s/cm | 100 |
(2) electrophoresis process
With embodiment 1.
(3) paint film property
| Project | Performance |
| Appearance | Smooth even |
| Thickness/μm | 20-25 |
| Hardness | 3H |
| Adhesive force | 1-2 |
| Resistant to acetone | >120h |
| Resistance to 5%H2SO4 | >48h |
| Resistance to 5%NaOH | >240h |
| Resistance to 3%NaCl | >240h |
| Resistance to water | 480h |
| Resistance to impact/cm | ≥50 |
| Pliability/mm | ≤1 |
Embodiment 3
(1) formula
| Title | Specification | Mass fraction |
| Film forming binder | Solid content 40% | 45 |
| Coalescents | Chemical pure | 0.3 |
| Defoamer | Chemical pure | 0.5 |
| Titanium dioxide | Technical grade | 17 |
| Pulvis Talci | Technical grade | 16 |
| Deionized water | Electrical conductivity < 15 μ s/cm | 100 |
(2) electrophoresis process
With embodiment 1.
(3) paint film property
| Project | Performance |
| Appearance | Smooth even |
| Thickness/μm | 20-25 |
| Hardness | 3H |
| Adhesive force | 1-2 |
| Resistant to acetone | >120h |
| Resistance to 5%H2SO4 | >48h |
| Resistance to 5%NaOH | >240h |
| Resistance to 3%NaCl | >240h |
| Resistance to water | 480h |
| Resistance to impact/cm | ≥50 |
| Pliability/mm | ≤1 |
Embodiment 4
(1) formula
| Title | Specification | Mass fraction |
| Film forming binder | Solid content 40% | 45 |
| Coalescents | Chemical pure | 0.5 |
| Defoamer | Chemical pure | 0.3 |
| Titanium dioxide | Technical grade | 18 |
| Pulvis Talci | Technical grade | 15 |
| Deionized water | Electrical conductivity < 15 μ s/cm | 100 |
(2) electrophoresis process
With embodiment 1.
(3) paint film property
| Project | Performance |
| Appearance | Smooth even |
| Thickness/μm | 20-25 |
| Hardness | 3H |
| Adhesive force | 1-2 |
| Resistant to acetone | >120h |
| Resistance to 5%H2SO4 | >48h |
| Resistance to 5%NaOH | >240h |
| Resistance to 3%NaCl | >240h |
| Resistance to water | 480h |
| Resistance to impact/cm | ≥50 |
| Pliability/mm | ≤1 |
Embodiment 5
(1) formula
| Title | Specification quality mark |
| Film forming binder | Solid content 40%50 |
| Coalescents | Chemical pure 0.7 |
| Defoamer | Chemical pure 0.5 |
| Titanium dioxide | Technical grade 19 |
| Pulvis Talci | Technical grade 14 |
| Deionized water | Electrical conductivity < 15 μ s/cm100 |
(2) electrophoresis process
With embodiment 1.
(3) paint film property
| Project | Performance |
| Appearance | Smooth even |
| Thickness/μm | 20-25 |
| Hardness | 3H |
| Adhesive force | 1-2 |
| Resistant to acetone | >120h |
| Resistance to 5%H2SO4 | > 48h slightly comes off |
| Resistance to 5%NaOH | >240h |
| Resistance to 3%NaCl | >240h |
| Resistance to water | 480h |
| Resistance to impact/cm | ≥50 |
| Pliability/mm | ≤1 |
Embodiment 6
(1) formula
| Title | Specification | Mass fraction |
| Film forming binder | Solid content 40% | 50 |
| Coalescents | Chemical pure | 0.7 |
| Defoamer | Chemical pure | 0.5 |
| Titanium dioxide | Technical grade | 20 |
| Pulvis Talci | Technical grade | 12 |
| Deionized water | Electrical conductivity < 15 μ s/cm | 100 |
(2) electrophoresis process
With embodiment 1.
(3) paint film property
| Project | Performance |
| Appearance | Smooth even |
| Thickness/μm | 20-25 |
| Hardness | 3H |
| Adhesive force | 1-2 |
| Resistant to acetone | >120h |
| Resistance to 5%H2SO4 | > 48h severe detachment |
| Resistance to 5%NaOH | >240h |
| Resistance to 3%NaCl | >240h |
| Resistance to water | 480h |
| Resistance to impact/cm | ≥50 |
| Pliability/mm | ≤1 |
Embodiment 7
(1) formula
| Title | Specification | Mass fraction |
| Film forming binder | Solid content 40% | 30 |
| Coalescents | Chemical pure | 1.0 |
| Defoamer | Chemical pure | 0.5 |
| Titanium dioxide | Technical grade | 25 |
| Pulvis Talci | Technical grade | 20 |
| Deionized water | Electrical conductivity < 15 μ s/cm | 100 |
(2) electrophoresis process
With embodiment 1.
(3) paint film property
| Project | Performance |
| Appearance | Smooth even |
| Thickness/μm | 15-20 |
| Hardness | 3H |
| Adhesive force | 1-2 |
| Resistant to acetone | >100h |
| Resistance to 5%H2SO4 | > 48h severe detachment |
| Resistance to 5%NaOH | >200h |
| Resistance to 3%NaCl | >200h |
| Resistance to water | 480h |
| Resistance to impact/cm | ≥50 |
| Pliability/mm | ≤1.5 |
As seen from the above embodiment, the cathode electrophoresis dope based on epoxy resin have corrosion-resistant, acid and alkali-resistance, cleaning,
The advantages such as environmental protection, but there is the shortcomings such as adhesive force is the highest, mar proof is unsatisfactory, resistance to water is bad, use organic silicone oil pair
Epoxy resin is modified improve the adhesive force of cathode electrophoresis dope, resistance to water, resistance to impact, increases film thickness；
Ethylene glycol monoethyl ether, epsilon-caprolactams is used to reduce deblocking temperature as the sealer of the preparation semiclosed MDI of cationic；Adopt
Make, with the semiclosed MDI of cationic, the electrophoresis that firming agent brings in order to overcome firming agent and resin alloy technique be coated with film component and join
Than problems such as instability, electrophoresis groove liquid stability is the best, easy layerings, cost can be reduced simultaneously and reduce toxicity.Electrophoretic painting mistake
In journey, the resin of cation group can change at surface of the work generation hydrophilic-hydrophobic, increases blocked isocyanate water dispersible
With common swimming, the problem brought with resin alloy technique efficiently against firming agent.Compared with TDI, MDI not only low price and
And toxicity is little, uses cation-modified MDI to make firming agent and can be effectively reduced the cost of coating, and at production, work progress
Pollution-free generation, beneficially industrial safety protection.
Claims (6)
1. the preparation method for the one pack system cathode electrophoresis dope of vehicle paint base, it is characterised in that use following steps to enter
Row preparation:
The synthesis of semiclosed MDI
MDI and a small amount of catalyst are joined in the four-hole bottle with thermometer, agitator and separatory funnel, are warming up to 40 DEG C,
Insulated and stirred 30min；Again ethylene glycol monoethyl ether and epsilon-caprolactams are joined in reaction system by separatory funnel, be warming up to
70 DEG C, isothermal reaction 2h, terminates reaction and obtains semi-enclosed MDI；
2) synthesis of modifying epoxy resin by organosilicon
In the four-hole bottle with thermometer, agitator and condenser, add ethylene glycol monobutyl ether, be warming up to 80 DEG C, add
Epoxy resin, is warming up to 120-130 DEG C, makes epoxy resin all dissolve；It is cooled to 80 DEG C, adds organic silicone oil and be warming up to
90-100 DEG C, stirring reaction 2h；It is cooled to 80 DEG C, adds diethanolamine, be warming up to 90-100 DEG C, insulated and stirred 2h；Drop again
Temperature, to 80 DEG C, adds semi-enclosed MDI, is warming up to 110 DEG C, insulated and stirred 2.5h；It is cooled to 70 DEG C, adds lactic acid neutralization, continue
Continuous insulated and stirred 0.5h, stopped reaction；Add lactic acid and deionized water in the reactive mixture, stir with emulsification pretreatment blender
1-2h, obtains film forming binder；
3) formula of cathode electrophoresis dope stock solution, is calculated as with weight/mass percentage composition:
Film forming binder 35%-55%
Coalescents 0.1%-1%
Defoamer 0.05%-0.5%
Titanium dioxide 15%-25%
Pulvis Talci 10%-20%
Deionized water adds to 100%；
4) electrophoresis process
First the cathode electrophoresis dope stock solution high speed dispersor containing modifying epoxy resin by organosilicon is stirred, join electrophoresis
In groove, being slowly added to deionized water and being diluted to solid content is 18%, filters, with the pH value of acetic acid regulation tank liquor to 5.0, with at a high speed
Dispersion machine stirs 24 hours, obtains directly carrying out the coating emulsion of electrophoresis experiment, does anode with corrosion resistant plate, with through de-
Fat, the tinplate after phosphatization is as negative electrode, and coated article iron plate was required for before following operation is carried out locating before electro-deposition
Reason: sand papering → oil removing → washing → rust cleaning → washing → neutralization → washing → normal temperature phosphating → wash → dry up, puts into dry
Dry device preserves, and electrophoretic voltage is 150V, and electrophoresis time is 3 minutes, after electrophoresis terminates, takes out negative electrode iron plate and first removes with tap water
The paint liquid of remaining surface, then with distilled water flushing, solidify 30 minutes at 180 DEG C, prepare cathode electrophoresis dope paint film；
Described catalyst is the ethylene glycol monoethyl ether solution containing 10% dibutyl tin dilaurate, and addition is MDI mass
0.5%, described epoxy resin is bisphenol A type epoxy resin, and epoxide number is 0.44, and epoxide equivalent is 210-244, and molecular weight is
426-488, softening point is 15-23 DEG C, and described organic silicone oil is organosiloxane monomer 1706.
The preparation method of the one pack system cathode electrophoresis dope for vehicle paint base the most according to claim 1, its feature exists
The composition of following percentage by weight is included in one pack system cathode electrophoresis dope:
Film forming binder 40%-50%
Coalescents 0.3%-0.7%
Defoamer 0.1%-0.5%
Titanium dioxide 15%-20%
Pulvis Talci 12%-18%
Deionized water adds to 100%.
The preparation method of the one pack system cathode electrophoresis dope for vehicle paint base the most according to claim 1, its feature exists
The composition of following percentage by weight is included in one pack system cathode electrophoresis dope:
Film forming binder 45%
Coalescents 0.7%
Defoamer 0.3%
Titanium dioxide 20%
Pulvis Talci 15%
Deionized water adds to 100%.
The preparation method of the one pack system cathode electrophoresis dope for vehicle paint base the most according to claim 1, its feature exists
In: described coalescents is the Texanol of Yi Si Man of the U.S..
The preparation method of the one pack system cathode electrophoresis dope for vehicle paint base the most according to claim 1, its feature exists
In: described defoamer is the BYK-028 of Bi Ke chemical company.
The preparation method of the one pack system cathode electrophoresis dope for vehicle paint base the most according to claim 1, its feature exists
In: described titanium dioxide is titanium dioxide TR-92, Pulvis Talci a size of 600 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410184005.4A CN104004448B (en) | 2014-05-04 | 2014-05-04 | A kind of one pack system cathode electrophoresis dope for vehicle paint base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410184005.4A CN104004448B (en) | 2014-05-04 | 2014-05-04 | A kind of one pack system cathode electrophoresis dope for vehicle paint base |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104004448A CN104004448A (en) | 2014-08-27 |
| CN104004448B true CN104004448B (en) | 2016-07-13 |
Family
ID=51365361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410184005.4A Expired - Fee Related CN104004448B (en) | 2014-05-04 | 2014-05-04 | A kind of one pack system cathode electrophoresis dope for vehicle paint base |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104004448B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104312246B (en) * | 2014-09-30 | 2017-02-08 | 南京悠谷知识产权服务有限公司 | Metallic cathode electrophoretic paint and preparation method thereof |
| CN106010239A (en) * | 2016-06-30 | 2016-10-12 | 太仓市金新涂料有限公司 | Environment-friendly corrosion resistant primer and preparation method thereof |
| CN106939152B (en) * | 2017-04-20 | 2020-07-31 | 成都龙之泉科技股份有限公司 | Preparation method of flame-retardant temperature-resistant corrosion-resistant adhesive |
| CN107987668A (en) * | 2017-12-05 | 2018-05-04 | 广东科德环保科技股份有限公司 | A kind of scratch resistance Wuxi environment protection type cathode electrophoresis coating and preparation method thereof |
| CN109023485B (en) * | 2018-08-23 | 2020-10-27 | 深圳和而泰智能控制股份有限公司 | Surface treatment method of aluminum alloy die casting |
| CN110105845A (en) * | 2019-05-27 | 2019-08-09 | 枣阳市旺前电泳涂料有限公司 | A kind of cathode epoxy electrophoretic paint and its production method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226913A (en) * | 1996-06-05 | 1999-08-25 | 纳幕尔杜邦公司 | Cathodic electrocoating compositions containing alkane sulfonic acid |
| CN1451702A (en) * | 2003-04-29 | 2003-10-29 | 华南理工大学 | Organic silicon modified cathode electrophoresis epoxy coating and process for preparing same |
| CN101402820A (en) * | 2008-09-25 | 2009-04-08 | 江泽平 | Single-component 175 DEG C oven dry cationic watersoluble epoxy-polyurethane corrosion protection paint base system |
| CN103319691A (en) * | 2013-06-24 | 2013-09-25 | 浩力森涂料（上海）有限公司 | Method for preparing organic silicon modified epoxy electrophoretic coating emulsion |
-
2014
- 2014-05-04 CN CN201410184005.4A patent/CN104004448B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226913A (en) * | 1996-06-05 | 1999-08-25 | 纳幕尔杜邦公司 | Cathodic electrocoating compositions containing alkane sulfonic acid |
| CN1451702A (en) * | 2003-04-29 | 2003-10-29 | 华南理工大学 | Organic silicon modified cathode electrophoresis epoxy coating and process for preparing same |
| CN101402820A (en) * | 2008-09-25 | 2009-04-08 | 江泽平 | Single-component 175 DEG C oven dry cationic watersoluble epoxy-polyurethane corrosion protection paint base system |
| CN103319691A (en) * | 2013-06-24 | 2013-09-25 | 浩力森涂料（上海）有限公司 | Method for preparing organic silicon modified epoxy electrophoretic coating emulsion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104004448A (en) | 2014-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104004448B (en) | A kind of one pack system cathode electrophoresis dope for vehicle paint base | |
| CN102070927B (en) | Water-based surface treatment agent for color coating pretreatment of galvanized plates | |
| CN104559635B (en) | High-performance environment-friendly water-based ship inner cabin coating | |
| CN101760736B (en) | Galvanized steel sheet surface treating agent, galvanized steel sheet and preparation methods thereof | |
| CN102993906B (en) | Water-base epoxy antirust paint and preparation method | |
| TWI394864B (en) | Metal surface treatment composition, and surface-treated metal material with metal surface treatment film obtained from the metal surface treatment composition | |
| CN106906462B (en) | A kind of metal surface pretreating reagent and preparation method thereof, application | |
| CN107418389B (en) | A kind of graphene long-effective corrosion priming paint and preparation method thereof | |
| CN110482380A (en) | A kind of elevator PCM plate and its production technology | |
| CN105349017B (en) | A kind of anticorrosive paint and preparation method for adding graphene composite material | |
| CN109593429A (en) | A kind of preparation method and application of L-Trp modified graphene oxide aqueous epoxy resins | |
| CN108864790A (en) | Graphene Composite Anticorrosive Pigment Using and preparation method thereof | |
| CN105637044A (en) | Cationic water-dilutable binders | |
| CN102534593A (en) | Resin/silane compounded passivation liquid for galvanized coil steel and preparation method of resin/silane compounded passivation liquid | |
| CN109880484A (en) | A kind of water-base epoxy thickness slurry anti-decaying paint and its preparation method and application | |
| CN108531045A (en) | A kind of aqueous epoxide resin paint and its preparation method and application that graphene is modified | |
| JP2009280884A (en) | Film formation method | |
| CN106894009B (en) | A kind of epoxy group POSS modified metal surface pretreating reagent and preparation method thereof, application | |
| CN101333404B (en) | Water-soluble epoxy red ferric oxide primer and method of preparing same | |
| CN106835093B (en) | A kind of Q type POSS modified metal surface pretreating reagent and preparation method thereof, application | |
| CN107969133A (en) | Cation electric deposition paint composition | |
| JP5652999B2 (en) | Metal surface treatment composition and surface-treated metal material having a metal surface treatment layer obtained from the metal surface treatment composition | |
| CN109535942A (en) | A kind of high anti-corrosion chromium-free fingerprint-resistant coating and preparation method thereof | |
| CN103502367B (en) | Cation electric deposition paint composition and the article of coating | |
| CN107892862A (en) | A kind of aqueous double-component anti-corrosive primer and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160713 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |