CN101235530A - Electrophoresis transport device surface antifouling treatment - Google Patents
Electrophoresis transport device surface antifouling treatment Download PDFInfo
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- CN101235530A CN101235530A CNA2008100504756A CN200810050475A CN101235530A CN 101235530 A CN101235530 A CN 101235530A CN A2008100504756 A CNA2008100504756 A CN A2008100504756A CN 200810050475 A CN200810050475 A CN 200810050475A CN 101235530 A CN101235530 A CN 101235530A
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- hydrophobic anti
- paint
- fouling paint
- surface energy
- fouling
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Abstract
The invention relates to a surface antifouling preparation of haulage plant in electrophoretic coating production process such as common push-rod chain, proper motion electric hoists, sledding swing-rob chain, frock of the coated work-pieces and fixtures. The process comprises insulation priming which is coated with enhanced adhesive force and top finish is hydrophobic anti-fouling paint, wherein the hydrophobic anti-fouling paint is characterized in that the surface energy of the hydrophobic anti-fouling paint is lower than that of fluoropolymer resin with 25dyne/cm, the electrophoretic plaint is water paint, which can not be wetted on the surface of the hydrophobic anti-fouling paint. If the work pieces move away from the surface of electrophoresis tank solution, the electrophoresis tank solution is contracted into a liquid drop shaped and drops down, since the hydrophobic anti-fouling paint can enable the electrophoretic liquid is just like one layer of floating dust, thereby, the low surface energy of the hydrophobic anti-fouling paint can enable few drop marks to be easily cleaned out by subsequent water deluge.
Description
Invention field
The present invention relates to transportation equipment in the electrophoretic painting production process: common stretched wire, push rod stretched wire, prevent the treatment process that applied by electrocoating paint on the parts such as electric hoist, sled fork chain and frock voluntarily.This treatment process is to apply water repelling anti-fouling coating on the electrophoresis transport device, and electrocoating paint is applied not on water repelling anti-fouling coating, even or slight electrophoresis liquid vestige is arranged, also can be removed totally in the flushing of pre-treatment water easily.This method is compared with existing method, and transportation equipment need not be cleared up, and can there be the pollution electrophoresis groove liquid in transportation equipment and be coated with workpiece.
Background technology
Be coated with in the workpiece electrophoretic painting process at quilts such as mechanical transport instrument, engineering equipments, in the coating process, relevant transportation equipment such as common stretched wire push rod stretched wire, electric hoist, sled fork chain and be coated with frock on the workpiece, anchor clamps etc. voluntarily, owing to steep in electrophoresis liquid simultaneously, also can be applied by electrocoating paint simultaneously.In common electrophoresis transport device, though the surface has applied insulation compound, electrocoating paint also can stick to transport device surface.
The long-pending lacquer of electrophoresis transport device surface is perplexing the electrophoresis manager always, the old line of especially old paint line and facility investment economy, and problem is particularly outstanding.Electrophoresis transport device long-time running rear surface long-pending lacquer out-of-shape, hole is many, and local hard, conventional manual finishing is difficult to clean out, and clearance time is long, forms new deposition again very soon after the cleaning.The long-pending lacquer of electrophoresis transport device surface has not only increased materials consumption, also easily causes going here and there liquid, and the dropping liquid phenomenon has had a strong impact on the electrodeposited paint film quality, has also increased waste residue, the quantity discharged of waste liquid simultaneously.
At this problem, foreign equipment manufacturers have successively developed RoDip delivery system (full-rotary type) and the multi-functional shuttle machine of Vario-Shuttle, by changing conveying, suspending way, have promptly solved inner chamber air bag problem, have also alleviated the long-pending lacquer problem of hanger.But also increased occupation area of equipment, facility investment and maintenance management expense simultaneously, be not suitable for old paint line transformation.
In existing electrophoresis transport device insulation coating processing, coatingsurface can be big, water contact angle is little, belong to hydrophilic coating.Electrocoating paint adheres to very easily in the above, and is difficult for being removed by spray water.And its water contact angle of water repelling anti-fouling coating is greater than 90 °, and surface energy is lower than 25 dynes per centimeter.Electrocoating paint is a water-borne coatings, can not be wetting at the water repelling anti-fouling coating surface, as long as workpiece leaves the electrophoresis groove liquid surface, electrophoresis liquid will be shrunk to droplet-like and drip down, and few drop impression is because the low surface energy of water repelling anti-fouling coating makes the electrophoresis dropping liquid be fallen by follow-up water spray Cleaning for High Capacity as one deck floating dust is easy.
Water repelling anti-fouling coating has many kinds, most water repelling anti-fouling coating is the tensio-active agent that adds low surface energy in the coating matrix resin, in the coating film process, low surface energy group row reaches to a surperficial side that it is hydrophobic in the tensio-active agent of low surface energy, antifouling effect.This coating is also wanted acid phosphating solution then because its tensio-active agent is easily free, and especially owing to electrophoretic painting process complexity, its workpiece surface will pass through alkali degreasing solution earlier, contains the solvent composition electrophoresis liquid.The tensio-active agent of low surface energy and the bonding force of resin are not enough to resist so abominable processing environment, and can very fast inefficacy, even may pollute electrophoresis groove liquid.So water repelling anti-fouling coating must have following requirement, coating must be that resin height is crosslinked, can not add any tensio-active agent, the agent of nonshrink hole, film coalescence aid, stain control agent, softening agent etc.So just very high to the requirement of resin.Need high cross-linking density, very strong erosion resistance, insulativity, solvent resistance, impact resistance, require like this, existing water repelling anti-fouling coating, as, low surface energy anti-fouling paints such as organosilicon, though hydrophobic nature is good, surface tension is very low, but its solvent resistance is relatively poor, and paint film is soft, its water repelling anti-fouling performance is bad, and can not use.
Perfluoro-compound has very low surface energy, and the fluorine atom amount on its surface carbon atom is the important factor that influences surface energy.The surface energy of tetrafluoroethylene is very low, but its film process is a high temperature sintering, can't have thicker insulation priming paint and it supporting, and the insulativity of its individual layer is bad, and the high temperature sintering surface pinholes is more simultaneously, and is general to the electrocoating paint antifouling property.
We have selected nano-silicon dioxide modified, fluorinated acrylic resin, ptfe micropowder for use, its solidification value is at 110～150 ℃, 0.5 hour to 1.5 hours, its surface energy is lower than 25 dynes per centimeter, 105～115 ° of water contact angles, the special-purpose priming paint of adapted, long period of soaking can not come off in degreasing fluid, phosphatization liquid or in the electrophoresis liquid, bubbles, can not raise by surface energy, have secular water repelling anti-fouling performance.
Summary of the invention
The water repelling anti-fouling coating of required usefulness comprises following composition among the present invention: resin with low surface energy, nano silicon, tetrafluoroethylene.
Low surface resin can be any polymkeric substance with fluorine functional group, and this polymkeric substance includes but not limited to fluoroolefins, based on inclined to one side difluoro alkene, and the polymkeric substance of inclined to one side trifluoro-ethylene, fluorovinyl ether.Fluoropolymer can be thermoplastics type or thermosetting polymer.
Preferred fluoropolymer is a fluorate acrylic acid, and tetrafluoroethylene, described composition generally also contain other acrylic acid or the like, the combination of alcohol acids, epoxies, phenolic, polyester resin.Purpose is to improve the film-forming properties and the sticking power of fluoropolymer resin.
The water repelling anti-fouling coating mode of filming can be brushing, dip-coating, spraying.
The drying mode of water repelling anti-fouling coating is 50～160 ℃ of oven dry.
Matching used insulation priming paint can be the adhesion promoter that epoxy resin-based paint, polyester coating, epoxy resin-based paint, polyester coating need add increases top layer water repelling anti-fouling paint adhesion.
Embodiment
Following examples will the present invention is further illustrated, but be not to be used to limit the scope of the invention, and anyly is familiar with the technology of the present invention field person, without prejudice to spirit of the present invention following modification of being reached and variation, all belongs to scope of the present invention.
Embodiment 1
Get bi-component priming paint A component 300 grams, bi-component priming paint B component 100 grams (company limited provides by the intelligent one-tenth coating in Changchun) mix after even 10 minutes, are coated on the steel plate of handling well, and two-sided being coated with is coated with at twice, 1.5 millimeters of total film thicknesses.
Embodiment 2
The preparation of water repelling anti-fouling coating
Fluorinated acrylamide resin (the intelligent one-tenth coating in Changchun company limited) 100g
Nano silicon (Degussa) 1.2g
Ptfe micropowder (Daikin) 1.5g
Solvent (the intelligent one-tenth coating in Changchun company limited) 20g
1800 rev/mins, disperseed the system lacquer 2 hours.
Embodiment 3
Former embodiment 2 brushes on the priming paint of placing in embodiment 1 after 5 hours, two-sided being coated with, dry 15 minutes after, 140 ℃ of oven dry 1 hour.
Embodiment 4
Get embodiment 3 floating coats and survey water contact angle, 108.9 ° with video optics contact angle measurement DSA100 (German KR ü SSGmbH).
Embodiment 5
Get embodiment 3, be placed on pre-treatment degreasing fluid (the rapids essence of Shenyang handkerchief card) 30 days, paint film does not have the foaming that comes off, and takes out and places 2 hours, surveys 109.8 ° of water contact angles, in the measuring error scope, and the contact angle no change.
Embodiment 6
Get embodiment 3, be placed in the pre-treatment phosphatization liquid (the rapids essence of Shenyang handkerchief card) 30 days, paint film does not have the foaming that comes off, and takes out and places 2 hours, surveys 107.3 ° of water contact angles, in the measuring error scope.
Embodiment 7
Get embodiment 3 and be placed in the electrophoresis groove liquid (EC3000) and soak after 30 days, the blank model of dip-coating simultaneously, blank plate take out dry by the fire in, coating surface does not have shrinkage cavity.The no electrocoating paint in immersion test model water flushing surface adheres to, and places and surveys 107 ° of water contact angles after 2 hours.
Claims (4)
1. the antifouling processing of transportation equipment during electrophoretic painting is produced, this processing comprises:
1) applies the insulation priming paint that contains adhesion promoter;
2) water repelling anti-fouling coating.
2. as in the claim 1, water repelling anti-fouling coating is characterized in that its surface energy is lower than 25 dynes per centimeter, and water contact angle is greater than 90 °.
3. as in the claim 1, water repelling anti-fouling coating is characterized in that its surface energy is lower than 25 dynes per centimeter.
4. include following optional low surface energy component as low surface energy material in the claim 3: fluoropolymer resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100504756A CN101235530A (en) | 2008-03-13 | 2008-03-13 | Electrophoresis transport device surface antifouling treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100504756A CN101235530A (en) | 2008-03-13 | 2008-03-13 | Electrophoresis transport device surface antifouling treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101235530A true CN101235530A (en) | 2008-08-06 |
Family
ID=39919424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100504756A Pending CN101235530A (en) | 2008-03-13 | 2008-03-13 | Electrophoresis transport device surface antifouling treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101235530A (en) |
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2008
- 2008-03-13 CN CNA2008100504756A patent/CN101235530A/en active Pending
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Open date: 20080806 |