CN105315854B - The high long life topcoat coating of self-cleaning type and the color coated steel sheet for scribbling the coating - Google Patents
The high long life topcoat coating of self-cleaning type and the color coated steel sheet for scribbling the coating Download PDFInfo
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Abstract
The invention discloses a kind of high long life topcoat coating of self-cleaning type, its chemical composition percent mass proportioning：Matrix resin 30~47%；Crosslinked resin 3~10%；Acid catalyst 0.1~0.3%；Inorganic pigment 25~40%；Hydrophilic additive 2~6%；Lubricating auxiliary agent 0.3~2%；Adjust auxiliary agent 2~7%；Solvent 10~25%.Present invention also offers a kind of color coated steel sheet, it outwards includes successively from core：Band plating laminar substrate, pretreatment layer, front and back prime coat, front and back top coat layer；The front finish paint layer is coated to obtain by the high long life topcoat coating of self-cleaning type of the present invention.The topcoat paint of the present invention has excellent self-cleaning function and high-durability energy.Equally, color coated steel sheet of the invention possesses excellent hydrophily, good anti-stain characteristic to realize self-cleaning function；In addition, also have excellent endurance quality concurrently.
Description
Technical field
The present invention relates to a kind of coating and the steel plate coated with the coating, more particularly to a kind of topcoat paint and coated with this
The steel plate of coating.
Background technology
Color coated steel sheet has the appearance of beauty, the combination of different colors and excellent barrier propterty because of it, and extensive
Ground is applied to lightweight steel construction roof and metope in building trade.However, as the passage of usage time, color coated steel sheet are frequent
The Problem of Failure such as loss of gloss, dusting, discoloration, corrosion can be run into.In addition, the much time using time can cause color coated steel sheet surface
Seriously it is stained, during artificial cleaning expense, laborious and expensive, is finally also difficult to clean completely.Therefore, manufacturing enterprise is intended to color coating steel
Plate can have high-durability and self-cleaning function concurrently.
Publication No. is CN101985250A, and date of publication is on March 16th, 2011, the Chinese patent of entitled " color coated steel sheet "
Document discloses the technical solution of a kind of formed method of weather-resistant self-cleaning coating.The weather-resistant self-cleaning coating includes：One base material；One
High durable primer coating, on the base material, wherein the high durable primer coating include at least high durable resin or it is inorganic into
Part additive；And a high contact angle coating, on the high durable primer coating, the water of the wherein high contact angle coating connects
Feeler is greater than about 130 degree.The durability of coloured picture steel plate disclosed in the patent document is only through priming paint to realize, finishing coat is
Hydrophobic coat and do not possess anti-stain characteristic energy, with the lengthening of color coated steel sheet active time, finishing coat hydrophobic effect reduces, extraneous dirty
Dye thing will be embedded into coating paint film and cause the surface contamination of colored steel.
Publication No. CN201721083U, publication date are on January 26th, 2011, entitled " a kind of self cleaning prepainted steel sheet "
Chinese patent literature relate to a kind of Coil Coating Products with self-cleaning function.The Coil Coating Products include cold-reduced sheet (1), the cold rolling
The both sides of plate (1) are each coated with zinc coat (2), and the outer surface of zinc coat is equipped with chemical conversion layer (3), the appearance of chemical conversion layer
Face is equipped with anti-corrosion epoxy layer (4), and polyester colored paint layer (5) is scribbled outside primer coating, automatic cleaning coating is scribbled outside polyester colored paint layer
(6).The hydrophily that the self-cleaning property of the Coil Coating Products is only through topcoat is achieved, it does not have anti-stain characteristic energy；
And the topcoat of the Coil Coating Products is conventional polyester type coating, does not have high-durability energy.
Publication No. CN102134426A, publication date are on July 27th, 2011, entitled " fluorine carbon roller coat self-cleaning paint
And preparation method thereof " Chinese patent literature disclose a kind of self-cleaning paint with fluorine carbon and preparation method thereof.The coating
In added with accounting for the fluorinated siloxane nanoparticle active agent of fluorine carbon roller coat self-cleaning paint weight proportion 1%~5%.A kind of fluorine carbon roller
Apply self-cleaning paint preparation method is including step：Fluorocarbon coating varnish is dispersed through, the fluorine that nanoscale grinds, formed after color matching
Carbon coating control temperature adds the fluorination silica for accounting for fluorine carbon roller coat self-cleaning paint weight proportion 1%~5% at 25~35 DEG C
Alkane nanoparticle active agent, reaction are toasted 90~110 seconds after 25~35 minutes under 235~250 DEG C of temperature conditionss.The self-clean type applies
Material, to realize high-durability energy, can be significantly increased by fluorine carbon resin using the synthesis cost of the colored steel of the coating.Apply
Be covered with coating purchases only with Hydrophilic Mechanism the compactness and stain resistance for reach self-cleaning effect, having not focused on paint film
Energy.
Therefore, color coated steel sheet of the prior art can not have durability and self-cleaning concurrently well.
The content of the invention
It is an object of the invention to provide a kind of high long life topcoat coating of self-cleaning type, the material of the topcoat paint is coated with
With excellent hydrophilicity, good outdoor durable and excellent self-cleaning performance, it can be realized only by rain drop erosion
Self-cleaning function.
To achieve these goals, the present invention proposes a kind of high long life topcoat coating of self-cleaning type, its chemical composition matter
Measuring per distribution ratio is：
The design principle of each chemical composition in the high long life topcoat coating of self-cleaning type of the present invention is：
Matrix resin：Matrix resin enables to coating to have good anti-ultraviolet ageing performance, improves the family of coating
Outer durability and service life.Hydroxyl and carboxyl in matrix resin have higher activity, can be with crosslinking described below
Resin is reacted, and can increase the crosslink density of coating.When matrix resin is less than 30wt.%, the anti-ageing of paint film can be reduced
Change performance；When matrix resin is higher than 47wt.%, the compactness of coating will be influenced, and reduce the anti-stain characteristic energy of paint film.Cause
This, it is 30~47wt.% that topcoat paint of the present invention, which is needed the percent mass proportioning control of matrix resin,.
Crosslinked resin：Crosslinked resin can produce cross-linking reaction with matrix resin, it is intended to further increase in solidification process
Add the crosslink density of coating, to improve the consistency of coating, so that the paint film after curing has good contaminated resistance
And corrosion resistance.In the inventive solutions, it should the content of crosslinked resin is set as 3~10wt.%, its reason
It is：When crosslinked resin is less than the crosslinked action unobvious of 3wt.%, crosslinked resin and matrix resin, film curing degree is not
It is enough, so that the stain resistance and corrosion resistance of coating can be reduced；And when crosslinked resin is higher than 10wt.%, then having can cause paint film resistance to
The reduction of ageing properties.
Acid catalyst：Acid catalyst main function is the cross-linking and curing reaction for accelerating interlaminar resin.If acid catalyst is less than
0.1wt.%, its catalytic action and unobvious, cross-linking reaction cannot be completed in time, if acid catalyst is higher than 0.3wt.%, its
It will influence the stability of coating.So, it is necessary to which the additive amount of acid catalyst is controlled for technical scheme
For 0.1~0.3wt.%.
Inorganic pigment：Inorganic pigment is mainly the different colours for providing paint film, it can be allocated according to required color.
Compared to organic pigment, the ageing-resistant performance of electrodeless pigment has obvious advantage.If the percent mass proportioning of electrodeless pigment is low
In 25%, then colouring property is bad；If the percent mass proportioning of electrodeless pigment is higher than 40%, resin is endless for the cladding of pigment
Entirely, so that paint film ageing-resistant ability declines.For this reason, the additive amount of inorganic pigment is set as in technical scheme
25~40wt.%.
Hydrophilic additive：In coating baking process, hydrophilic additive can be migrated to coating surface, and hydrolysis occurs instead after meeting water
Should, one layer of hydrophilic layer is formed in coating surface, in this way, rainwater just can form one completely in coating surface during raining
Moisture film.At the same time, rainwater can also be completely penetrated by the gap and aperture of paint film, will can just be painted by rainwash effect
The pollutant of film surface rinses out.When the content of hydrophilic additive is less than 2wt.%, hydrophilic effect and unobvious, work as hydrophilic additive
Content when being more than 6wt.%, then can influence the anti-stain characteristic energy of coating.Therefore, there is excellent hydrophily of the present invention
It is 2~6wt.% with needing to control the content of hydrophilic additive in the topcoat paint of anti-stain characteristic.
Lubricating auxiliary agent：When the additive amount of lubricating auxiliary agent is less than 0.3wt.%, the curved performances of paint film T and adhesion strength are obvious
Deterioration, and when the additive amount of lubricating auxiliary agent is higher than 2wt.%, paint film anti-stain characteristic greatly declines.For this reason, the face of the present invention
It is 0.3~2.0wt.% to paint the content of the lubricating auxiliary agent in coating and need to control
Adjust auxiliary agent：, it is necessary to control the mass percentage for adjusting auxiliary agent 2 for technical scheme
~7wt.%.
Solvent：The effect of solvent is that coating is diluted to prescribed concentration and solid content, in topcoat paint of the present invention
In, it is 10~25wt.% by the mass percentage control of solvent.
Further, in topcoat paint of the present invention, above-mentioned matrix resin is the fat of molecular weight 3000~5000
Fat race polyester resin.
Further, in topcoat paint of the present invention, above-mentioned aliphatic polyester resin uses aliphatic polybasic
Acid blend is polymerized with polyol blends under organotin catalysts effect.
Due to instead of aromatic polyester resins usually used in the prior art using aliphatic polyester resin so that warp
The coating crossed after topcoat paint coating has better resistance to ultraviolet, anti-aging property, has the weather resistance more than 15 years.
Further, in topcoat paint of the present invention, above-mentioned crosslinked resin is epoxy modified amino resin, trimerization
At least one of cyanamide formaldehyde resin and Lauxite.
Further, in topcoat paint of the present invention, above-mentioned acid catalyst is benzene sulfonic acid catalyst.
Further, in topcoat paint of the present invention, above-mentioned hydrophilic additive is organic silicon hydrophilic additive.
Further, in topcoat paint of the present invention, above-mentioned organic silicon hydrophilic additive is the first and second base silica
Alkane.
Further, in topcoat paint of the present invention, above-mentioned lubricating auxiliary agent is high density polyethylene waxes, polytetrafluoro
At least one of ethylene waxes and Polytetrafluoroethylene emulsion.
Further, in topcoat paint of the present invention, above-mentioned adjusting auxiliary agent includes levelling agent, flatting silica and anti-settling
At least one of agent.
Further, in topcoat paint of the present invention, above-mentioned solvent is butyl glycol ether, butyl acetate and third
At least one of glycol methyl ether acetate.
The self-cleaning function of material after topcoat paint of the present invention coating is the excellent parent by coating
Water-based+anti-stain characteristic is achieved, its hydrophily is then to be migrated by hydrophilic additive during curing of coatings to surface, and
One layer of hydrophilic layer is formed after hydrolysis and is obtained；And its anti-stain characteristic can be the high-crosslinking-degree by matrix resin and crosslinked resin
Curing is obtained with improving the compactness of paint film.
In addition, present invention also offers a kind of color coated steel sheet, which outwards includes successively from core：Band coating base
Plate, pretreatment layer, front and back prime coat, front and back top coat layer；Wherein, any one of front finish paint layer by mentioned earlier
Topcoat paint coats to obtain.
Further, in color coated steel sheet of the present invention band plating laminar substrate for hot dip galvanizing substrate, hot-dip aluminizing zinc substrate,
One of which in electrogalvanizing substrate, zinc-iron alloy substrate
Further, the pretreatment layer in color coated steel sheet of the present invention contains Co and Cr elements, and wherein Co contents are 3
~7mg/m2, Cr contents are 15~25mg/m2。
Topcoat paint of the present invention has excellent hydrophily, good anti-stain characteristic to realize self-cleaning function；This
Outside, excellent endurance quality is also had concurrently.
After coating of the front finish paint layer of color coated steel sheet of the present invention by above-mentioned topcoat paint, it is with excellent
Hydrophily so that rainwater can form complete moisture film in coating surface.
After coating of the front finish paint layer of color coated steel sheet of the present invention by above-mentioned topcoat paint, it has good
Anti-stain characteristic so that dust can not be penetrated into inside paint film.
Above two characteristic realizes the self-cleaning function of Coil Coating Products, is gone merely with can be achieved with cleaning after rain drop erosion
The effect of dirt, saves cleaning and the maintenance cost of color coated steel sheet.
After coating of the front finish paint layer of color coated steel sheet of the present invention by above-mentioned topcoat paint, also with excellent
Endurance quality, can ensure that the long-time under severe rugged environment outdoors uses, extend the service life of color coated steel sheet.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of the color coated steel sheet of the present invention under embodiment.
Embodiment
Below will be according to specific embodiment to the high long life topcoat coating of self-cleaning type of the present invention and coated with this
The color coated steel sheet of topcoat paint makes further explanation, but specific embodiment and related description are not formed for the present invention's
The improper restriction of technical solution.
Embodiment A1-A5 and comparative example B1-B5
The percent mass proportioning of each chemical composition shown according to table 1 is prepared in embodiment A1-A5 and comparative example B1-B5
Topcoat paint, wherein, the non-volatile content of the topcoat paint in embodiment A1-A5 is 55~65%, and viscosity is 15~30s
(utilizing -4 glasss of viscosity Cai -4 measured of Cai).
Table 1 lists the quality hundred of each chemical composition of this case embodiment A1-A5 and the topcoat paint in comparative example B1-B5
Distribution ratio.
Table 1*. (wt.%)
* note：1. matrix resin is the aliphatic polyester resin that molecular weight is 3000-5000, its glass transition temperature 15-35
DEG C, acid number 25-45mg KOH/g, hydroxyl value 120-170mgKOH/g；Solid content 50-70%.
2. crosslinked resin using epoxy modified amino resin, melamine resin and Lauxite at least within it
One, optimally, using melamine resin.
3. acid catalyst is benzene sulfonic acid catalyst.
4. inorganic pigment is titanium dioxide, (according to the difference of required color, those skilled in that art are also an option that other
Inorganic pigment).
5. hydrophilic additive is the first and second radical siloxanes.
6. lubricating auxiliary agent is at least one of high density polyethylene waxes, polytetrafluoroethylwax wax and Polytetrafluoroethylene emulsion, optimal
Ground, using high density polyethylene waxes.
7. as needed, adjust at least one of auxiliary agent selected as levelling agent, flatting silica, anti-settling agent.
8. solvent is at least one of butyl glycol ether, butyl acetate and propylene glycol methyl ether acetate.
According to following steps coated substrate to form color coated steel sheet, it is specially：
1) substrate is selected：Hot-dip aluminizing zinc substrate is selected, its front and back coating weight is 75g/m2；
2) pretreatment layer is prepared：The pretreatment layer of front and back uses the compound film former for the element that forms a film containing Co and Ni
Obtained, Co and Cr members in pretreatment layer with the closing of chromating agent spray again after spray process is carried out to coating substrate surface
The content of element is Co：3~7mg/m2；Cr：15~25mg/m2；
3) back side prime coat is prepared：Using epoxy type primer base, obtained by roller coat, furnace drying method, PMT (plates
Temperature)：230~240 DEG C, 3 μm of thickness of dry film；
4) front prime coat is prepared：Using polyurethane type primer base, obtained by roller coat, furnace drying method, PMT (plates
Temperature)：230~240 DEG C, 5 μm of thickness of dry film；
5) back side top coat layer is prepared：The white polyester finish coat coating of steel, obtains by roller coat, furnace drying method, PMT (plate temperature)：
230-240 DEG C, 6 μm of thickness of dry film；
6) front finish paint layer is prepared：Using the topcoat paint in embodiment A1-A5 and comparative example B1-B5, by roller coat, dry
Drying method obtains, PMT (plate temperature)：220~260 DEG C, 15~20 μm of thickness of dry film, related process parameters are referring particularly to table 1；
7) the finished product color coated steel sheet finally obtained, as shown in Figure 1, it outwards includes successively from core：Band plating laminar substrate 1,
Pretreatment layer 2, front and back prime coat 3,4 and front and back top coat layer 5,6.
By after the topcoat paint in above-described embodiment A1-A5 and comparative example B1-B5 coats and to form front finish paint layer
Color coated steel sheet sampling cuts into normal size model and is tested as follows, so as to obtain the experiment for evaluating its properties respectively
Data, specific test event and test method are as follows：
1) weather resistance
Model is placed in ultraviolet aging test chamber (UVB-313 fluorescent tubes), 8hr is a cycle period, wherein, 4hr is purple
Outer illumination, 60 ± 3 DEG C of blackboard temperature；4hr is condensation, and 50 ± 3 DEG C of blackboard temperature, observes simultaneously model appearance after 1000h
Its chalk rating is evaluated, evaluation criterion is as follows：
◎：Coating is without blistering, cracking；Chalk rating is 0 grade specified in GB/T 1766；
○：Coating is without blistering, cracking；Chalk rating is 1 grade specified in GB/T 1766；
Δ：Coating is without blistering, cracking；Chalk rating is 2-3 grades specified in GB/T 1766；
×：Coating is without blistering, cracking；Chalk rating is 4-5 grades specified in GB/T 1766.
2) hydrophilicity
The hydrophilic of the coating is characterized using the contact angle size of distilled water and the coating surface of horizontal positioned top coat layer
Property.In order to embody the distinctive hydrolysis properties of some hydrophilic coatings, need coating to be measured being hydrolyzed in advance before contact angle is detected
Processing.Evaluation criterion is as follows：
◎：Contact angle≤50 °；
○：50~65 ° of contact angle；
Δ：65~80 ° of contact angle；
×：80~95 ° of contact angle.
3) anti-stain characteristic energy
Using carbon black solution as standard solid thing, coated on specimen surface, in baking oven, temperature is 60 DEG C of drying 1hr, is taken
After going out cooling, scum silica frost is removed while being rinsed with flowing water while being wiped with absorbent cotton, cleans to plate face and is transferred to without black pollution thing
On absorbent cotton, hair dryer air-dries, and color difference meter detection does not stain position with staiing the value of chromatism Δ E* at position.Evaluation criterion is such as
Under：
◎：ΔE*≤0.5；
○：Δ E*=0.5-1.5；
Δ：Δ E*=1.5-2.5；
×：ΔE*≥2.5.
4) corrosion resisting property
Model neutral salt spray test, carries out according to ASTMB117, time 1000hr, and evaluation criterion is as follows：
◎：Bubble density grade and Air Bubble Size should be not more than 2 grades of 21 defined of table in GB/T1766；
○：Bubble density grade and Air Bubble Size should be not more than 3 grades of 21 defined of table in GB/T1766；
Δ：Bubble density grade and Air Bubble Size should be not more than 4 grades of 21 defined of table in GB/T1766；
×：Bubble density grade and Air Bubble Size should be not more than 5 grades of 21 defined of table in GB/T1766.
5) the curved performances of T
Carried out according to the bend test standard in GB/T 13448-2006, evaluation criterion is as follows：
◎：≤3T；
○：4T；
Δ：5T；
×：≥6T.
6) adhesion property
Carried out according to the cross cut test standard in GB/T 13448-2006, evaluation criterion is as follows：
◎：Cross cut test is rated specified in GB/T 13448-2006 tables 10 grade；
○：Cross cut test is rated specified in GB/T 13448-2006 tables 1 1-2 grades；
Δ：Cross cut test is rated specified in GB/T 13448-2006 tables 1 2-3 grades；
×：Cross cut test is rated specified in GB/T 13448-2006 tables 1 4-5 grades.
7) impact resistance
Carried out according to the reverse impact testing standard in GB/T 13448-2006, evaluation criterion is as follows：
◎：Cause coating without the maximum impact work(>=9J for cracking and coming off；
○：Coating is caused without the maximum impact work(for cracking and coming off to be 7-8J；
Δ：Coating is caused without the maximum impact work(for cracking and coming off to be 6-7J；
×：Coating is caused without the maximum impact work(for cracking and coming off to be≤6J.
8) pencil hardness
Carried out according to the pencil hardness test standard in GB/T 13448-2006, evaluation criterion is as follows：
◎：Pencil hardness >=HB；
○：Pencil hardness B-2B；
Δ：Pencil hardness 3B-4B；
×：Pencil hardness≤5B.
Table 2 illustratively show the color coating after each topcoat paint in coating above-described embodiment A1-A5 and comparative example B1-B5
Correlation test data of the steel plate model after above-mentioned test.
Table 2.
From table 2 it can be seen that due to being not added with crosslinked resin in B1, it is inadequate to result in the crosslink density of paint film, so as to draw
The anti-stain characteristic of color coated steel sheet and the obvious reduction of corrosion resisting property are played；Again due to the additive amount deficiency of hydrophilic additive, result in
Contact angle on surface of coating is bigger than normal, so as to cause the hydrophilicity of color coated steel sheet bad.Because of crosslinked resin excessive addition in B2, and base
Body resin content is again relatively relatively low, causes the obvious deterioration of weather resistance.Acid catalyst is not added with B3 so that cross-linking reaction exists
Cannot be completed in time during film curing, cause color coated steel sheet anti-stain characteristic can decline and weather resistance be also deteriorated.B4
In hydrophilic additive too high levels so that the anti-stain characteristic of color coated steel sheet can and corrosion resisting property reduce.Inorganic pigment adds in B5
Excessive, crosslinked resin is incomplete for the cladding of pigment, and the weather resistance and corrosion resisting property of color coated steel sheet decline.And with the present invention
Embodiment A1-A5 in topcoat paint film-forming after color coated steel sheet show good hydrophilicity, dirt-resistant
Performance, corrosion resisting property, weather resistance, adhesion property and excellent processing performance.
Color coated steel sheet provided by the present invention, after the topcoat paint film-forming in technical scheme, makes
Obtain the color coated steel sheet not only with excellent outdoor durable (coated coating was with the weather resistance of more than 15 years) outside, also
With good self-cleaning function, that is to say, that in the case where regularly need not manually clean, only by nature
Rainwater can be realized as the cleaning of color coated steel sheet, not only increase the long-acting dicoration of steel plate, or a kind of environmentally friendly production
Product；Therefore, topcoat paint and color coated steel sheet of the present invention can be widely used in climatic environment harshness, and atmosphere pollution is serious
Workplace.
It should be noted that listed above is only specific embodiment of the invention, it is clear that real the invention is not restricted to more than
Example is applied, the similar change for having many therewith.If those skilled in the art directly exported from present disclosure or
All deformations associated, are within the scope of protection of the invention.
Claims (13)
1. a kind of high long life topcoat coating of self-cleaning type, it is characterised in that its chemical composition percent mass proportioning is：
Described matrix resin be molecular weight 3000~5000 aliphatic polyester resin, its acid number 25-45mgKOH/g, hydroxyl value
120-170mgKOH/g。
2. the high long life topcoat coating of self-cleaning type as claimed in claim 1, it is characterised in that the aliphatic polyester resin is adopted
It is polymerized with aliphatic polybasic acid blend and polyol blends under organotin catalysts effect.
3. the high long life topcoat coating of self-cleaning type as claimed in claim 1, it is characterised in that the crosslinked resin changes for epoxy
At least one of property amino resins, melamine resin and Lauxite.
4. the high long life topcoat coating of self-cleaning type as claimed in claim 1, it is characterised in that the acid catalyst is benzene sulfonic acid
Catalyst.
5. the high long life topcoat coating of self-cleaning type as claimed in claim 1, it is characterised in that the hydrophilic additive is organosilicon
Class hydrophilic additive.
6. the high long life topcoat coating of self-cleaning type as claimed in claim 5, it is characterised in that the organic silicon hydrophilic additive
For the first and second radical siloxanes.
7. the high long life topcoat coating of self-cleaning type as claimed in claim 1, it is characterised in that the lubricating auxiliary agent is high density
At least one of Tissuemat E and polytetrafluoroethylwax wax.
8. the high long life topcoat coating of self-cleaning type as claimed in claim 1, it is characterised in that the adjusting auxiliary agent includes levelling
At least one of agent, flatting silica and anti-settling agent.
9. the high long life topcoat coating of self-cleaning type as claimed in claim 1, it is characterised in that the solvent is ethylene glycol fourth
At least one of ether, butyl acetate and propylene glycol methyl ether acetate.
10. a kind of color coated steel sheet, it outwards includes successively from core：Band plating laminar substrate, pretreatment layer, front and back prime coat,
Front and back top coat layer；It is characterized in that, the front finish paint layer is as the automatically cleaning as described in any one in claim 1-9
The high long life topcoat coating of type coats to obtain.
11. color coated steel sheet as claimed in claim 10, it is characterised in that the band plating laminar substrate is hot dip galvanizing substrate, hot dip
One of which in aluminium zinc-base plate, electrogalvanizing substrate, zinc-iron alloy substrate.
12. color coated steel sheet as claimed in claim 10, it is characterised in that the pretreatment layer contains Co and Cr elements, wherein
Co contents are 3~7mg/m2, Cr contents are 15~25mg/m2。
13. color coated steel sheet as claimed in claim 10, it is characterised in that the thickness of dry film of the front finish paint layer is 15~20
μm。
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| CA3048244A1 (en) * | 2016-12-29 | 2018-07-05 | Cytec Industries, Inc. | Aqueous primer composition for adhesive bonding and bonding method using the same |
| CN110484040B (en) * | 2019-08-16 | 2021-05-18 | 杭州普络飞新材料科技有限公司 | PCM plate for air conditioner outdoor unit and production process thereof |
| CN110358417A (en) * | 2019-08-16 | 2019-10-22 | 杭州普络飞新材料科技有限公司 | A kind of stainless steel PCM plate and its production technology |
| CN110961330A (en) * | 2019-11-28 | 2020-04-07 | 广州市敬业金属实业有限公司 | Treatment method of self-cleaning iron art rail |
| CN116213225A (en) * | 2022-12-20 | 2023-06-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Galvanized steel sheet with weather-proof self-cleaning coating and continuous production method thereof |
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| CN101289594A (en) * | 2007-04-18 | 2008-10-22 | 宝山钢铁股份有限公司 | Coating for sandwich panel and board two-used colorful steel plates and method of use thereof |
| CN101343502A (en) * | 2008-08-12 | 2009-01-14 | 无锡市虎皇漆业有限公司 | Coil coating finishing paint and preparation thereof |
| CN102977746A (en) * | 2012-12-25 | 2013-03-20 | 广州慧谷工程材料有限公司 | Nanometer oil-strain resistant and antibacterial self-cleaning coating and preparation method and application thereof |
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