CN106905830A - A kind of aqueous electronic whiteboard coating and preparation method and application - Google Patents

A kind of aqueous electronic whiteboard coating and preparation method and application Download PDF

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Publication number
CN106905830A
CN106905830A CN201710115458.5A CN201710115458A CN106905830A CN 106905830 A CN106905830 A CN 106905830A CN 201710115458 A CN201710115458 A CN 201710115458A CN 106905830 A CN106905830 A CN 106905830A
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electronic whiteboard
aqueous
coating
water
agent
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CN106905830B (en
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冯志德
梁攀
胡文龙
冀伟强
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QINGYUAN HUIGU NEW MATERIAL TECHNOLOGY Co.,Ltd.
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GUANGZHOU HUMAN ENGINEERING MATERIAL Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/20—Diluents or solvents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
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  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention discloses a kind of aqueous electronic whiteboard coating and preparation method and application.The coating includes following composition：Water-based acrylic resin, amine neutralizer, curing agent, catalyst, wetting dispersing agent, titanium dioxide, nano-calcium carbonate, defoamer, levelling agent, fumed silica, flatting silica, cosolvent.First just titanium dioxide, nano-calcium carbonate, wetting dispersing agent, defoamer, fumed silica is sequentially added into water, is stirred, and is ground through sand mill, obtains aqueous pre- slurrying；Under stirring, in aqueous pre- slurrying, remaining composition is added, stirred, obtain aqueous electronic whiteboard coating.Aqueous electronic whiteboard coating of the invention is based one-pack-type coating, is uniformly dispersed, and is stored and easy to use；Properties of coating is excellent：The balance of hardness and pliability, slipping and silk-screen, writing property and wiping；Without benzene kind solvent, the feature of environmental protection is strong, can be widely used in and write electronic whiteboard field.

Description

A kind of aqueous electronic whiteboard coating and preparation method and application
Technical field
The invention belongs to aqueous industrial coating field, more particularly to a kind of aqueous electronic whiteboard coating and preparation method thereof with Using.
Background technology
In the international market, possesses the unification for the function such as writing, projecting and printing due to writing electronic whiteboard, using very Extensively.Due to the powerful cost advantage of Chinese manufacturing, global electronic whiteboard more than 80% is all complete in China in recent years Produced into manufacture.The coating in electronic whiteboard field is write, quality is also very different, existing large-scale external coating production enterprise is as stood The leading market such as nation, has domestic various solvent based coating producers to set foot in this field again, but processability, writing property, wiping and The performances such as projection property can not be balanced all the time.
At home on Coating Market, for a long time, traditional solvent based coating is applied to interior decoration field, in very great Cheng The physical and mental health of people is affected on degree, environment-friendly water paint is quite favored by consumer.In the prior art, electronics Blank coating is solvent based coating, there is problems with current application process：First, wide variety of water in the market Property coating be that, with aqueous acrylic emulsion as main film forming substance, the impact and pliability of coating are poor, poor processability, application Field is confined to building materials coating and woodcare paint etc.；Second, coating hardness is low (2H) after solvent-borne type blank coating film forming, surface slip Degree is low, and wiping is poor, and for the electronic whiteboard for having writing property higher and wiping requirement, solvent based coating is difficult to reach its property Can require；3rd, smell is big when existing solvent-borne type blank coating is used, and can not only be caused harm to workmen's body, and And carrying capacity of environment is very high, the VOC emission high that work progress is produced can severe contamination environment.
The content of the invention
Primary and foremost purpose of the invention is the shortcoming for overcoming prior art, there is provided a kind of aqueous electronic whiteboard coating.
Preparation method another object of the present invention is to provide described aqueous electronic whiteboard coating.
It is still another object of the present invention to provide the application of described aqueous electronic whiteboard coating.
The purpose of the present invention is achieved through the following technical solutions：A kind of aqueous electronic whiteboard coating, comprising as follows by quality The composition of percentages：Water-based acrylic resin 30~35%, amine neutralizer 2~3%, curing agent 6~10%, catalyst 0.2 ~0.5%, wetting dispersing agent 2~3%, titanium dioxide 15~20%, nano-calcium carbonate 6~10%, defoamer 0.5~1%, levelling Agent 0.5~1%, fumed silica 0.5~1%, flatting silica 1~1.5%, cosolvent 5~10%.
Described aqueous electronic whiteboard coating also includes water, and water is surplus.
Described water-based acrylic resin is water soluble acrylic resin, it is preferable that glass transition temperature is 30~50 DEG C, acid number be 40~100mg KOH/g, the aqueous acrylamide that hydroxyl value is 30~80mg KOH/g, molecular weight is 10000~15000 Acid resin；More preferably Zhuhai Ji power chemical industry AC-749RG, AC-769RG and Beijing sunlight converge in moral YG-AC255, YG-AC272 At least one.
Described amine neutralizer is used for neutralized aqueous acrylic resin, forms carboxylate, strengthens it water-soluble.Preferably, The amine neutralizer is N, N- dimethylethanolamines (DMEA).
Described curing agent is water-based isocyanate, with good water solubility, can be with the hydroxyl in water-based acrylic resin Base reacts；Preferably Bayer Beyer Co., Ltd of GermanyBL 5140、D270 and Japan Asahi- At least one in KASEI Asahi Kasei Corporations MF-B60X, SBN-70D.
The hydroxyl that described catalyst is used to be catalyzed in water-based acrylic resin reacts with curing agent, in the short period State of cure higher is reached, reactivity is improved；The acid of preferably organic tin catalyst, more preferably di lauric dibutyl Tin, such as U.S. AIR PRODUCTS aerochemistries DBTDL-T12.
Described wetting dispersing agent is high-molecular block copolymer solution, for stablizing titanium dioxide and other fillers, makes it It is dispersed in coating, not floating or sedimentation layering.Preferably Germany Bi Ke BYK-180, BYK-AT-250 and BYK- At least one in 2012.
Described titanium dioxide is Chinese white, whiteness and covering power for providing coating, preferably TiO2Content> 95%th, whiteness>98%th, covering power<45g/m2Titanium dioxide；More preferably Du Pont R706.
Described nano-calcium carbonate is white filler, the slipping for providing coating surface, preferably CaCO3Content> 99%th, whiteness>95%th, moisture<0.4% nano-calcium carbonate；The more preferably ZY-725 of Guangxi clock hundred million.
Described defoamer is organosilicon polymer, and preferably BYK-022, BYK-024 of Germany Bi Ke and German enlightening is high At least one in Airex 901w, Airex 902w.
Described levelling agent is acrylate polymer, preferably BYK-381, BYK-3441 and upper Haitai of Germany Bi Ke At least one in Tec-138w, Tech-247 of lattice.
The particle diameter of described vapor phase method titanium dioxide is 7~15nm, and viscosity and rheological property for adjusting water paint increase The storage stability of strong water paint；Preferably Germany win wound Degussa AEROSOL R812, AEROSOL R972 and At least one in AEROSOL R974.
Described flatting silica is particle diameter<6 μm, porosity is the flatting silica of 2ml/g, and its surface can show by inorganic treatment Writing reduces coating surface glossiness, at least one in preferably Guangzhou Hui Gu chemistry AD802 and AD8085.
Described cosolvent is alcohol ethers organic compound, for the dissolubility of reinforced resin and auxiliary agent in water, preferably It is at least one in ethylene glycol monobutyl ether and propylene glycol monomethyl ether.
Described water is preferably deionized water.
The preparation method of above-mentioned aqueous electronic whiteboard coating, comprises the steps of：
(1) titanium dioxide, nano-calcium carbonate, wetting dispersing agent, defoamer, fumed silica are added to water successively In, stir, ground through sand mill, obtain aqueous pre- slurrying；
(2) under stirring, in the aqueous pre- slurrying obtained toward step (1), water-based acrylic resin, amine are sequentially added Nertralizer, curing agent, catalyst, levelling agent, flatting silica and cosolvent, stir, and obtain aqueous electronic whiteboard coating；
Wherein, the content of each composition is by mass percentage, as follows：Water-based acrylic resin 30~35%, amine neutralizer 2 ~3%, curing agent 6~10%, catalyst 0.2~0.5%, wetting dispersing agent 2~3%, titanium dioxide 15~20%, nano-calcium carbonate Calcium 6~10%, defoamer 0.5~1%, levelling agent 0.5~1%, fumed silica 0.5~1%, flatting silica 1~ 1.5%th, cosolvent 5~10%, water surplus.
Stirring condition described in step (1) is preferably 600~800r/min and stirs 10~20min.
Degree of grinding described in step (1) is preferably aqueous pre- slurrying fineness≤10 μm.
Stirring condition described in step (2) is preferably 800~1000r/min and stirs 20~30min.
Described aqueous electronic whiteboard coating is preparing the application in writing electronic whiteboard product.Aqueous electronics of the invention Blank coating is based one-pack-type coating, is uniformly dispersed, and is stored and easy to use；Properties of coating is excellent：Hardness and pliability, The balance of slipping and silk-screen, writing property and wiping；Without benzene kind solvent, the feature of environmental protection is strong, can be widely used in and write electronics Blank field.
One kind writes electronic whiteboard product, is prepared into sheet metal surface by above-mentioned aqueous electronic whiteboard coatings Arrive.
It is above-mentioned to write electronic whiteboard product, preferably it is made by the steps and obtains：
(A) pretreatment of base material is carried out to sheet metal；
(B) the above-mentioned aqueous electronic whiteboard coating of even spread on the sheet metal processed by step (A), baking is cold But, flash is cut off, obtains writing electronic whiteboard product.
Sheet metal described in step (A) is preferably galvanizing steel substrate.
Pretreatment of base material described in step (A), preferably following steps：Washing, degreasing, washing, passivation, wash again, Drying.
Aqueous electronic whiteboard coatings described in step (B) in the thickness of dry film on the sheet metal, preferably 10~15 μm.
The condition of the baking described in step (B) is preferably 250~300 DEG C and toasts 60~90 seconds, makes sheet metal most High metal plate temperature (PMT) reaches 230~250 DEG C.
The present invention has the following advantages and effect relative to prior art：
(1), be applied to for water paint write electronic whiteboard field first by the aqueous electronic whiteboard coating that the present invention is provided, And start the beginning in domestic technique field.
(2) the aqueous electronic whiteboard coating excellent combination property that the present invention is provided, has reached hardness and pliability, slipping With the performance balance of silk-screen, writing property and wiping.
(3) the aqueous electronic whiteboard coating that the present invention is provided, relative to solvent based coating, does not contain toluene, dimethylbenzene, three The aromatic hydrocarbons harmful substance such as toluene, VOC emission is relatively low, belongs to Environmentally friendly coatings.
Specific embodiment
The present invention is described in further detail with reference to embodiment, but embodiment of the present invention not limited to this.
Embodiment 1
(1) aqueous electronic whiteboard coating A is prepared, the consumption of each component is as follows：
(2) preparation method of aqueous electronic whiteboard coating A is as follows：
(a) successively by titanium dioxide, nano-calcium carbonate, wetting dispersing agent, defoamer, fumed silica add to go from In sub- water, stirred (800rpm stirs 10min), and fineness≤10 μm are ground to through sand mill, obtains aqueous pre- slurrying A1；
(b) under stirring, in the aqueous pre- slurrying A1 obtained toward step (a), sequentially add water-based acrylic resin, Amine neutralizer, curing agent, catalyst, levelling agent, flatting silica and cosolvent, stir (800rpm stirs 30min), obtains water Property electronic whiteboard coating A；
(3) application process of aqueous electronic whiteboard coating A is as follows：
A () carries out pre-treatment to hot-dip galvanizing sheet steel：Washing, degreasing, washing, passivation, wash again, dry；
(b) the aqueous electronic whiteboard coating A of even spread (13 μm), baking on by the hot-dip galvanizing sheet steel of (a) treatment (270 DEG C/80s), cooling cuts off flash, obtains electronic whiteboard product A2.
Embodiment 2
(1) aqueous electronic whiteboard coating B is prepared, the consumption of each component is as follows：
(2) preparation method of aqueous electronic whiteboard coating B is as follows：
(a) successively by titanium dioxide, nano-calcium carbonate, wetting dispersing agent, defoamer, fumed silica add to go from In sub- water, stirred (600rpm stirs 20min), and fineness≤10 μm are ground to through sand mill, obtains aqueous pre- slurrying B1；
(b) under stirring, in the aqueous pre- slurrying B1 obtained toward step (a), sequentially add water-based acrylic resin, Amine neutralizer, curing agent, catalyst, levelling agent, flatting silica and cosolvent, stir (1000rpm stirs 20min), obtains Aqueous electronic whiteboard coating B；
(3) application process of aqueous electronic whiteboard coating B is as follows：
A () carries out pre-treatment to hot-dip galvanizing sheet steel：Washing, degreasing, washing, passivation, wash again, dry；
(b) the aqueous electronic whiteboard coating A of even spread (13 μm), baking on by the hot-dip galvanizing sheet steel of (a) treatment (270 DEG C/80s), cooling cuts off flash, obtains electronic whiteboard product B2.
Embodiment 3
(1) aqueous electronic whiteboard coating C is prepared, the consumption of each component is as follows：
(2) preparation method of aqueous electronic whiteboard coating C is as follows：
(a) successively by titanium dioxide, nano-calcium carbonate, wetting dispersing agent, defoamer, fumed silica add to go from In sub- water, stirred (700rpm stirs 15min), and fineness≤10 μm are ground to through sand mill, obtains aqueous pre- slurrying C1；
(b) under stirring, in the aqueous pre- slurrying C1 obtained toward step (a), sequentially add water-based acrylic resin, Amine neutralizer, curing agent, catalyst, levelling agent, flatting silica and cosolvent, stir (900rpm stirs 25min), obtains water Property electronic whiteboard coating C；
(3) application process of aqueous electronic whiteboard coating C is as follows：
A () carries out pre-treatment to hot-dip galvanizing sheet steel：Washing, degreasing, washing, passivation, wash again, dry；
(b) the aqueous electronic whiteboard coating A of even spread (13 μm), baking on by the hot-dip galvanizing sheet steel of (a) treatment (270 DEG C/80s), cooling cuts off flash, obtains electronic whiteboard product C2.
Embodiment 4
(1) aqueous electronic whiteboard coating D is prepared, the consumption of each component is as follows：
(2) preparation method of aqueous electronic whiteboard coating D is as follows：
(a) successively by titanium dioxide, nano-calcium carbonate, wetting dispersing agent, defoamer, fumed silica add to go from In sub- water, stirred (800rpm stirs 10min), and fineness≤10 μm are ground to through sand mill, obtains aqueous pre- slurrying D1；
(b) under stirring, in the aqueous pre- slurrying D1 obtained toward step (a), sequentially add water-based acrylic resin, Amine neutralizer, curing agent, catalyst, levelling agent, flatting silica and cosolvent, stir (900rpm stirs 25min), obtains water Property electronic whiteboard coating D；
(3) application process of aqueous electronic whiteboard coating D is as follows：
A () carries out pre-treatment to hot-dip galvanizing sheet steel：Washing, degreasing, washing, passivation, wash again, dry；
(b) the aqueous electronic whiteboard coating A of even spread (13 μm), baking on by the hot-dip galvanizing sheet steel of (a) treatment (270 DEG C/80s), cooling cuts off flash, obtains electronic whiteboard product D2.
Comparative example 1：Resin and curing agent go beyond the scope
(1) aqueous electronic whiteboard coating M is prepared, the consumption of each component is as follows：
(2) preparation method of aqueous electronic whiteboard coating M is as follows：
(a) successively by titanium dioxide, nano-calcium carbonate, wetting dispersing agent, defoamer, fumed silica add to go from In sub- water, stirred (700rpm stirs 15min), and fineness≤10 μm are ground to through sand mill, obtains aqueous pre- slurrying M1；
(b) under stirring, in the aqueous pre- slurrying M1 obtained toward step (a), sequentially add water-based acrylic resin, Amine neutralizer, curing agent, catalyst, levelling agent, flatting silica and cosolvent, stir (900rpm stirs 25min), obtains water Property electronic whiteboard coating M；
(3) application process of aqueous electronic whiteboard coating M is as follows：
A () carries out pre-treatment to hot-dip galvanizing sheet steel：Washing, degreasing, washing, passivation, wash again, dry；
(b) the aqueous electronic whiteboard coating A of even spread (13 μm), baking on by the hot-dip galvanizing sheet steel of (a) treatment (270 DEG C/80s), cooling cuts off flash, obtains electronic whiteboard product M2.
Comparative example 2：Color stuffing (titanium dioxide and nano-calcium carbonate) goes beyond the scope
(1) aqueous electronic whiteboard coating N is prepared, the consumption of each component is as follows：
(2) preparation method of aqueous electronic whiteboard coating N is as follows：
(a) successively by titanium dioxide, nano-calcium carbonate, wetting dispersing agent, defoamer, fumed silica add to go from In sub- water, stirred (700rpm stirs 15min), and fineness≤10 μm are ground to through sand mill, obtains aqueous pre- slurrying N1；
(b) under stirring, in the aqueous pre- slurrying N1 obtained toward step (a), sequentially add water-based acrylic resin, Amine neutralizer, curing agent, catalyst, levelling agent, flatting silica and cosolvent, stir (900rpm stirs 25min), obtains water Property electronic whiteboard coating N；
(3) application process of aqueous electronic whiteboard coating N is as follows：
A () carries out pre-treatment to hot-dip galvanizing sheet steel：Washing, degreasing, washing, passivation, wash again, dry；
(b) the aqueous electronic whiteboard coating A of even spread (13 μm), baking on by the hot-dip galvanizing sheet steel of (a) treatment (270 DEG C/80s), cooling cuts off flash, obtains electronic whiteboard product N2.
Comparative example 3：Use other fillers (nano barium sulfate replaces nano-calcium carbonate)
(1) aqueous electronic whiteboard coating P is prepared, the consumption of each component is as follows：
(2) preparation method of aqueous electronic whiteboard coating P is as follows：
(a) successively by titanium dioxide, nano-calcium carbonate, wetting dispersing agent, defoamer, fumed silica add to go from In sub- water, stirred (700rpm stirs 15min), and fineness≤10 μm are ground to through sand mill, obtains aqueous pre- slurrying P1；
(b) under stirring, in the aqueous pre- slurrying P1 obtained toward step (a), sequentially add water-based acrylic resin, Amine neutralizer, curing agent, catalyst, levelling agent, flatting silica and cosolvent, stir (900rpm stirs 25min), obtains water Property electronic whiteboard coating P；
(3) application process of aqueous electronic whiteboard coating P is as follows：
A () carries out pre-treatment to hot-dip galvanizing sheet steel：Washing, degreasing, washing, passivation, wash again, dry；
(b) the aqueous electronic whiteboard coating A of even spread (13 μm), baking on by the hot-dip galvanizing sheet steel of (a) treatment (270 DEG C/80s), cooling cuts off flash, obtains electronic whiteboard product P2.
Comparative example 4：Use other catalyst (Latent acid catalyst replaces organotin catalysts)
(1) aqueous electronic whiteboard coating Q is prepared, the consumption of each component is as follows：
(2) preparation method of aqueous electronic whiteboard coating Q is as follows：
(a) successively by titanium dioxide, nano-calcium carbonate, wetting dispersing agent, defoamer, fumed silica add to go from In sub- water, stirred (600rpm stirs 20min), and fineness≤10 μm are ground to through sand mill, obtains aqueous pre- slurrying Q1；
(b) under stirring, in the aqueous pre- slurrying Q1 obtained toward step (a), sequentially add water-based acrylic resin, Amine neutralizer, curing agent, catalyst, levelling agent, flatting silica and cosolvent, stir (1000rpm stirs 20min), obtains Aqueous electronic whiteboard coating Q；
(3) application process of aqueous electronic whiteboard coating Q is as follows：
A () carries out pre-treatment to hot-dip galvanizing sheet steel：Washing, degreasing, washing, passivation, wash again, dry；
(b) the aqueous electronic whiteboard coating A of even spread (13 μm), baking on by the hot-dip galvanizing sheet steel of (a) treatment (270 DEG C/80s), cooling cuts off flash, obtains electronic whiteboard product Q2.
Effect example：The performance indications of aqueous electronic whiteboard product
Product testing：Properties of product of the invention are detected, specific detection content is as follows：
I, detection content：Hardness, pliability, slipping, silk-screen, writing property, wiping, adhesive force.
II, examination criteria
(1) hardness determination
GB/T 6739-1996：Hardness of film is determined using the pencil of known hardness, with the hardness dolly of 1Kg, is loaded onto not With the pencil of hardness, plough hinders the hardness of the next stage of film as the hardness of film.
(2) pliability detection
GB/T 6742-2007：By in model insertion bending instrument, paint film is faced seat board, then rolled over to paint film outside direction Right angle is curved, model is taken out and is observed.Paint film flawless then OK, paint film has crackle then NG.
(3) slipping detection
ISO 16047：Using frictionmeter GM-1, two pieces of test pieces are kept flat together, connect in certain Under touch pressure, two surfaces are made to produce relative movement, record coefficient of sliding friction K.Coefficient of sliding friction K values are smaller, and slipping is got over It is high；Coefficient of sliding friction K values are bigger, and slipping is lower.
(4) silk-screen detection
JIS K5600-5-6：Cross-streak method.In blank product surface, with 250 mesh screen painting black inks, room temperature Place 3h；Delineated with lattice device is drawn, peeled off with cellophane tape, observe the stripping situation of black ink.If black ink layer cannot Peel off then OK, the NG if black ink layer is stripped.
(5) writing property detection
Electronic whiteboard professional standard：In blank product surface, at the uniform velocity write with PLUS white board markers (red, black, blue, green), seen Examine whether writing shrinks.The OK if writing ungauged regions, the NG if writing shrinks.
(6) wiping detection
Electronic whiteboard professional standard：In blank product surface, write with PLUS white board markers, room temperature places 4h；It is with weight The iron block parcel cotton of 2Kg, laterally at the uniform velocity wipes 6 times, observes written trace residual condition.The OK if surface remains without vestige, The NG if surface has vestige to remain.
(7) adhesive force detection
JIS K5600-5-6：Cross-streak method.In blank product surface, hundred lattice are delineated with lattice device is drawn, use cellophane tape Peel off, observe coating stripping situation.OK, the NG if coating is stripped if coating cannot be peeled off.
III, testing result are as shown in table 1：
The performance test of table 1, aqueous electronic whiteboard product
Detection project Blank Hardness Pliability Slipping Silk-screen Writing property Wiping Adhesive force
Embodiment 1 A2 4H OK K=0.25 OK OK OK OK
Embodiment 2 B2 4H OK K=0.26 OK OK OK OK
Embodiment 3 C2 4H OK K=0.24 OK OK OK OK
Embodiment 4 D2 4H OK K=0.25 OK OK OK OK
Comparative example 1 M2 3H OK K=0.30 OK OK NG OK
Comparative example 2 N2 4H NG K=0.42 OK OK NG OK
Comparative example 3 P2 4H NG K=0.40 OK OK NG OK
Comparative example 4 Q2 3H OK K=0.32 NG OK NG NG
From table 1, the aqueous electronic whiteboard coating that the present invention is provided has very excellent combination property.By comparative example 1st, 2,3,4 is visible, and the species or consumption of the component such as resin, curing agent, color stuffing, catalyst exceed number range of the invention all The combination property of aqueous electronic whiteboard coating can be caused to be deteriorated.
Therefore, the present invention provide aqueous electronic whiteboard coating have good hardness, pliability, slipping, silk-screen, Writing property and wiping.
Above-described embodiment is the present invention preferably implementation method, but embodiments of the present invention are not by above-described embodiment Limitation, it is other it is any without departing from Spirit Essence of the invention and the change, modification, replacement made under principle, combine, simplification, Equivalent substitute mode is should be, is included within protection scope of the present invention.

Claims (10)

1. a kind of aqueous electronic whiteboard coating, it is characterised in that comprising composition as follows by mass percentage：Water soluble acrylic acid Resin 30~35%, amine neutralizer 2~3%, curing agent 6~10%, catalyst 0.2~0.5%, wetting dispersing agent 2~3%, Titanium dioxide 15~20%, nano-calcium carbonate 6~10%, defoamer 0.5~1%, levelling agent 0.5~1%, fumed silica 0.5~1%, flatting silica 1~1.5%, cosolvent 5~10%；
Described catalyst is organic tin catalyst.
2. aqueous electronic whiteboard coating according to claim 1, it is characterised in that：Water is also included, water is surplus.
3. aqueous electronic whiteboard coating according to claim 1, it is characterised in that：
Described water-based acrylic resin is glass transition temperature for 30~50 DEG C, acid number are 40~100mg KOH/g, hydroxyl value It is the water-based acrylic resin that 30~80mg KOH/g, molecular weight are 10000~15000；
Described curing agent is water-based isocyanate；
Described defoamer is organosilicon polymer；
Described levelling agent is acrylate polymer；
Described wetting dispersing agent is high-molecular block copolymer solution.
4. aqueous electronic whiteboard coating according to claim 3, it is characterised in that：
Described water-based acrylic resin is AC-749RG, AC-769RG of Zhuhai Ji power chemical industry and the YG- of Beijing sunlight remittance moral At least one in AC255, YG-AC272.
5. aqueous electronic whiteboard coating according to claim 3, it is characterised in that：
Described curing agent be German Bayer Beyer Co., Ltd BL 5140, D270 and Japanese Asahi Kasei Corporation MF-B60X, At least one in SBN-70D；
During described defoamer is BYK-022, BYK-024 and German enlightening Airex 901w high, Airex 902w of German Bi Ke At least one；
During described levelling agent is BYK-381, BYK-3441 of German Bi Ke and Tec-138w, Tech-247 of Shanghai Tag It is at least one；
Described wetting dispersing agent is at least one in German Bi Ke BYK-180, BYK-AT-250 and BYK-2012.
6. aqueous electronic whiteboard coating according to claim 1, it is characterised in that：
Described catalyst is di lauric dibutyl acid tin；
Described amine neutralizer is N, N- dimethylethanolamines；
Described titanium dioxide is TiO2Content>95%th, whiteness>98%th, covering power<45g/m2Titanium dioxide；
Described nano-calcium carbonate is CaCO3Content>99%th, whiteness>95%th, moisture<0.4% nano-calcium carbonate；
The particle diameter of described vapor phase method titanium dioxide is 7~15nm；
Described flatting silica is particle diameter<6 μm, porosity is the flatting silica of 2ml/g；
Described cosolvent is alcohol ethers organic compound.
7. the preparation method of the aqueous electronic whiteboard coating described in any one of claim 1~6, it is characterised in that comprising following step Suddenly：
(1) titanium dioxide, nano-calcium carbonate, wetting dispersing agent, defoamer, fumed silica are added into water successively, is stirred Mix uniform, ground through sand mill, obtain aqueous pre- slurrying；
(2) under stirring, in the aqueous pre- slurrying obtained toward step (1), water-based acrylic resin, amine are sequentially added and is neutralized Agent, curing agent, catalyst, levelling agent, flatting silica and cosolvent, stir, and obtain aqueous electronic whiteboard coating；
Wherein, the content of each composition is by mass percentage, as follows：Water-based acrylic resin 30~35%, amine neutralizer 2~ 3%th, curing agent 6~10%, catalyst 0.2~0.5%, wetting dispersing agent 2~3%, titanium dioxide 15~20%, nano-calcium carbonate 6~10%, defoamer 0.5~1%, levelling agent 0.5~1%, fumed silica 0.5~1%, flatting silica 1~1.5%, Cosolvent 5~10%, water surplus.
8. the aqueous electronic whiteboard coating described in any one of claim 1~6 is preparing the application in writing electronic whiteboard product.
9. one kind writes electronic whiteboard product, it is characterised in that the aqueous electronic whiteboard as described in any one of claim 1~6 is applied Material is coated on sheet metal surface and prepares.
10. it is according to claim 9 to write electronic whiteboard product, it is characterised in that to be made by the steps and obtain：
(A) pretreatment of base material is carried out to sheet metal；
(B) the above-mentioned aqueous electronic whiteboard coating of even spread on the sheet metal processed by step (A), baking, cooling is cut Burr removal, obtains writing electronic whiteboard product.
CN201710115458.5A 2017-03-01 2017-03-01 A kind of aqueous electronic whiteboard coating and the preparation method and application thereof Active CN106905830B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107586497A (en) * 2017-10-12 2018-01-16 叶氏化工研发（上海）有限公司 A kind of water-based blank coating and preparation method thereof
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CN110607097A (en) * 2018-06-15 2019-12-24 立邦涂料（中国）有限公司 Preparation of low-odor water-based polymer coating suitable for chalk writing and scrubbing
CN110607097B (en) * 2018-06-15 2021-09-03 立邦涂料（中国）有限公司 Preparation of low-odor water-based polymer coating suitable for chalk writing and scrubbing
CN109233599A (en) * 2018-09-07 2019-01-18 安徽嘉智信诺化工股份有限公司 A kind of aqueous blank paint
CN114744230A (en) * 2022-05-10 2022-07-12 宁波信远材料科技股份有限公司 Flexible graphite bipolar plate and preparation method thereof
CN114744230B (en) * 2022-05-10 2023-10-20 宁波信远材料科技股份有限公司 Flexible graphite bipolar plate and preparation method thereof

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