CN101481584B - Dry powder latex paint for inner wall and preparation thereof - Google Patents
Dry powder latex paint for inner wall and preparation thereof Download PDFInfo
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- CN101481584B CN101481584B CN2009100369405A CN200910036940A CN101481584B CN 101481584 B CN101481584 B CN 101481584B CN 2009100369405 A CN2009100369405 A CN 2009100369405A CN 200910036940 A CN200910036940 A CN 200910036940A CN 101481584 B CN101481584 B CN 101481584B
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Abstract
本发明涉及一种环保型内墙干粉乳胶涂料及其制备方法。它的组成(重量)为可再分散聚合物乳胶粉10-40％、钛白粉10-40％、重质碳酸钙10-40％、煅烧高岭土5-20％、滑石粉5-10％、纤维素醚0.1-0.5％、固体消泡剂0.2-0.6％、多功能助剂0.2-1.0％、着色颜料0.01-10％。本发明形成的内墙干粉乳胶涂料加2-3倍的水兑稀后，可薄涂施工，干膜厚度为20μm-200μm；可调色；储存稳定，运输方便；其VOC不能险出(真正的零VOC)，涂膜性能满足内墙乳胶涂料国家标准的技术要求，产品综合性能达到同类产品的国际先进水平。The invention relates to an environment-friendly interior wall dry powder latex paint and a preparation method thereof. Its composition (weight) is redispersible polymer latex powder 10-40%, titanium dioxide 10-40%, heavy calcium carbonate 10-40%, calcined kaolin 5-20%, talcum powder 5-10%, fiber 0.1-0.5% of plain ether, 0.2-0.6% of solid defoamer, 0.2-1.0% of multifunctional auxiliary agent, and 0.01-10% of colored pigment. After adding 2-3 times of water to the dry powder latex paint for interior walls formed by the present invention, it can be thinly applied, and the dry film thickness is 20 μm-200 μm; it can be adjusted in color; it is stable in storage and convenient in transportation; its VOC cannot escape (real Zero VOC), the coating film performance meets the technical requirements of the national standard for interior wall latex paint, and the comprehensive performance of the product reaches the international advanced level of similar products.
Description
Technical field
The present invention relates to the preparation of building coating, more particularly, relate to a kind of environment-friendly type inner wall dry powder latex paint and preparation method thereof.
Background technology
Along with the raising of people's living standard and the enhancing of environmental consciousness, the consumption of water-borne coatings rises significantly.Particularly at building field, water-borne coatings (mainly being latex coating) has occupied the market of building coating more than 80%.
But the volatile organic compounds in the emulsion for architecture coating (Volatile Organic Compound is abbreviated as VOC) remains problem anxious to be solved to the harm of human body and environment.VOC in China's national Specification emulsion for architecture coating before 5 years≤250 grams/every liter of coating (about 1600 grams), present regulation is VOC≤100 gram/every liter of coating, USA in recent years is released " zero VOC coating ", regulation VOC≤5 gram/every liter of coating.Now general emulsion paint (building coating) is made up of the material of four components: 1. filmogen---macromolecule emulsion, as water polyacrylic acid etc.; 2. color stuffing---titanium dioxide, Paris white, pigment etc.; 3. water; 4. auxiliary agent---about 10 kinds of chemical substances such as film coalescence aid, defoamer, thickening material, flow agent, sanitas, frostproofer.In these four components, film forming goods and materials and color stuffing are referred to as solid part, are that formation coating institute is requisite.Needed when water is coating material production and construction (use), water accounts for 50% of building coating gross weight.Coating application to the wall after, water evaporate in the air, has just finished its effect, only solid part of remaining coating (film-forming polymer and color stuffing).Auxiliary agent is that building coating (emulsion paint) is produced, stored and necessary during construction (use).VOC in the latex coating is mainly derived from auxiliary agent, and it is the half volatile material mostly, and evaporation rate is slow, and there is long-term chronic effect in room and environment, and the toxicity that has may be bigger than the toxicity of volatile organism.
At this situation, it is believed that, mix with color stuffing after the film forming goods and materials (macromolecule emulsion) of latex coating are dried to powdery if will have now, mixture with water dissolution after if having a same performance of existing latex coating, then the problem of VOC has just thoroughly solved, and can save multiple auxiliary agent in the coating, save resource and cost.Therefore, dry powder paint arises at the historic moment.Early stage dry powder paint mainly occurs with putty and analogue form thereof, therefore many times the said dry powder paint of people is actually dry-powder putty, agree the putty powder of mineral levelling clay, Australian Zhuo Neng company etc. as the Canadian holder that enters China market the nineties in 20th century.Along with the kind increase of redispersible polymer rubber powder and color stuffing, the patent of dry powder paint is also more and more.Generally speaking, these dry powder paints are mainly with inorganic powder such as gypsum, white lime, lime carbonate, calcium oxide, kaolin, talcum powder, cement etc. are main raw material(s), add a spot of combination thing latex powder, ether of cellulose etc. mix, the inorganic powder texture coating that relates to of patent CN 1322078C for example, the multi-functional powder building coating that CN 1876733A relates to, the green powdered paint that CN1887989A relates to, the multifunctional dry powder coating that CN100351328C relates to, the toughened dried powder coating material that CN1380367A relates to, the dried corundum powder paint that CN1376742A relates to, the dry powder ceramic paint that CN1229824A relates to, the cement-based polymer paint powder that CN1194045C relates to, the construction industry dry powder paint that the dry ceramic powder as paint powder for building that CN1147530A relates to, CN1065668A relate to, or the like.But these dry powder paints all fail to promote, and major cause is that form of construction work needs the thick film application mostly, and film performance can not be compared with latex coating.
At present, from domestic and international reality, the dry powder paint on the market needs the thick film application, and product is more single, and the product of homogeneity is many, and is mainly used in the temporary construction field and other are to the less demanding occasion of film performance.Performance suitable with traditional internal wall emulsion coating, can mix colours and but preparation method scumbling, real zero VOC dry powder latex paint for inner wall does not at home and abroad appear in the newspapers as yet.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, a kind of environment-friendly type inner wall dry powder latex paint and preparation method thereof is provided, it is with dry powder form production, packing and transportation, adding water before construction stirs, construct by the form of brushing, roller coat or spraying then, characteristics such as filming of forming has excellent water tolerance, alkali resistance, weathering resistance, abrasion resistance, pollution resistance, suitable with the performance of traditional latex coating, and do not contain the component that VOC (zero VOC) and heavy metal etc. endanger environment and HUMAN HEALTH.
The present invention also aims to provide the preparation method of described dry powder latex paint for inner wall.
The weight percent of dry powder latex paint for inner wall of the present invention is composed as follows:
Polymer emulsion powder 10-40%
Titanium dioxide 10-40%
Water-ground limestone 10-40%
Calcined kaolin 5-20%
Talcum powder 5-10%
Ether of cellulose 0.1-0.5%
Solid defoamer 0.2-0.6%
Auxiliary agent 0.2-1.0%
Tinting pigment 0.01-10%;
Described ether of cellulose adopts one or more mixtures in methylcellulose gum, carboxymethyl cellulose, ethyl cellulose, Natvosol, the hydroxypropylcellulose.
Described auxiliary agent is an anion polyurethane.
Polymer emulsion powder in the above-mentioned prescription is that a kind of second-order transition temperature is-10 ℃～5 ℃ a high-molecular weight polymer powder, it can be the acrylate copolymer that is formed by multiple vinylformic acid (ester) monomer and methacrylic acid (ester) monomer copolymerization, also can be sour ethylene/vinyl multipolymer multipolymer, ethylene/vinyl acetate/vinyl acetate/ethylene-dien terpolymer powder, vinyl laurate/vinylchlorid terpolymer rubber powder etc.; Can adopt commercially available product, the Elotex polymer powder of the chemical company limited of for example national starch, the VINNAPAS polymer emulsion powder of Wa Ke company etc., its effect is that fillers such as titanium dioxide, water-ground limestone, calcined kaolin, talcum powder are glued together effectively, forms to have certain intensity and elastic filming after drying.The preferential acrylate copolymer latex powder that contains self-crosslinking functional group that adopts of the present invention.The consumption of dispersible polymer is directly connected to the performance of dry powder latex paint, the latex powder consumption is many more, the PVC of coating (pigment volume concentration (PVC)) is more little, base-material in filming is to the moistening of pigment particles and coat abundant more, thereby improved many performances of coating, as brushing resistance energy, the anti-performance etc. that stains, but too highly can influence hardness again and increase cost, its consumption is crossed intensity and the water tolerance that low meeting influence is filmed, and its amount ranges is 10～40%.
Titanium dioxide is an optimal white pigment commonly used in the building filler, and it has very high reflection potential and very low receptivity to visible light, and good lightness is arranged.Divided titanium dioxide is rutile-type and two kinds of crystal formations of anatase titanium dioxide, but Rutile type Titanium Dioxide is compared with anatase thpe white powder, have better opacifying power, weathering resistance and lower oil number, but the latter has lower price, and class wall less demanding to coating weatherability.So the dry powder interior wall coating of the present invention's preparation adopts anatase thpe white powder.According to the difference of colors such as dry powder paint dark color or light color, the optimum amount of titanium dioxide is chosen as 10-40%.
Water-ground limestone is widely used, inexpensive filler, plays filling effect, and it can also promote the flow leveling of coating, and its amount preferably accounts for 10～40% of dry powder latex paint total amount.
The kaolin main component is a kaolinite, and molecular formula is Al
2O
32SiO
22H
2O, its water tolerance, acid resistance, alkali resistance are good, and chemical stability is preferable, and can improve suspension, prevents the pigment sedimentation, improves the opacifying power of titanium dioxide in coating; Can improve latex coating viscosity, improve the thickening stabilities of latex coating, but its water-absorbent be big, alkali resistance is poor, also not too adapts to constituting filming of repellency.Kaolinic add-on is generally 5～20% of prescription total amount.
Talcum powder main component 3MgO4SiO
2H
2O is a hydroxo complex.Because in the talcum powder and oxygen bonded magnesium atom between two flaky silicon dioxides, form laminate structure, rely on weak Van der Waals force to combine between the adjacent layers, when shear action, the interlayer separate easily has soapy feeling, so can improve levelling property, improve the brushing property of lacquer, and can prevent pigment precipitation caking in the lacquer.Talcum powder can also absorbing film flexible stress, avoid taking place crack and space, thereby strengthen film strength, improve washing fastness.Yet the easy efflorescence of talcum powder needs other composition to be mated.It is 5-10% that the present invention selects its optimum amount.
Ether of cellulose is a kind of effective thickening material and auxiliary rheological agents, and its thickening mechanism is that big cellulosic molecule enters the dispersion medium aqueous phase, increases aqueous viscosity, and the increase of this aqueous viscosity is from cellulosic molecule intensive hydration and intermolecular winding; Owing to its water-retentivity, film-forming properties, can regulate dried coating film speed simultaneously, improve film-forming properties by changing its add-on.Can adopt wherein one or more mixtures such as methylcellulose gum, carboxymethyl cellulose, ethyl cellulose, Natvosol, hydroxypropylcellulose, starch ethers, it adds the affiliation meeting significantly increases latex coating viscosity, if but consumption is crossed the water resistance that conference reduces dry powder paint, its optimum amount is 0.1～0.5%.
The effect of solid defoamer is to suppress dry powder latex paint to convert the foam in the water process and eliminate the bubble that film process occurs.The dry blend that contains defoamer can be wetted quickly and more even, owing to eliminated foam, this auxiliary agent has been avoided the paint film defect in the application processes such as over-drastic contraction, porous.Its optimum amount scope is 0.2-0.6%.
Auxiliary agent is a kind of anionic polyurethane powder of high-molecular weight hydrophobically modified, and its effect is equivalent to dispersion agent, wetting agent and the film coalescence aid in traditional water emulsion coating.It not only can improve the paint flow levelling, increase coating film gloss, improve the opacifying power of filming, improve the color stuffing dispersion efficiency, and in film process, this multifunctional assistant can also be moved to the surface of filming earlier when the dry powder latex paint film forming, stops the too fast evaporation of moisture, thereby played the effect of softening agent, helped the raising of complete formation of filming and film performance.But its consumption is wanted suitably, and the very few purpose that helps to disperse and delay moisture evaporation that do not reach too much can hinder the drying of filming, and optimum amount is 0.2～1.0%.
Tinting pigment except white pigment is that the coloured dry powder latex paint of configuration is indispensable.Pigment is given the beautiful color of filming, and also improves the opacifying power of coating and weathering resistance etc. simultaneously.Because dry powder paint of the present invention does not adopt high speed dispersor to disperse converting water construction, thereby general pigment is difficult to be uniformly dispersed fully.The present invention mainly selects for use and is easy to the dispersive mineral dye, and its particle diameter ratio common pigments is little, and oil number is big, and opacifying power and tinting strength are all strong.Easily dispersible pigment mainly is easy dispersive ferric oxide series pigment, as red iron oxide, iron oxide yellow etc.According to the colored pigment of requirement of client adding different sorts and consumption, generally in the 0.01-10.0% scope.
The preparation method of the dry powder latex paint for inner wall that the present invention relates to comprises the steps: accurately to take by weighing various starting material according to the usage ratio of dry powder latex paint, and it is put into mix 40min in the dry powder blender, treat the material thorough mixing, adopt 120 purpose reciprocating sieves to remove bigger particle then, the packing of weighing at last promptly gets product.
The constructional method of dry powder latex paint for inner wall of the present invention comprises:
(1) inner wall surface pre-treatment.Should check the firm and smooth situation of body of wall before the construction earlier.Necessary clean, smooth, firm, solid, the no grease of body of wall, dust, moisture content, mildew.Batch lime wall must be clean, treat the body of wall water ratio less than 10%, pH value can brush less than 10 o'clock;
(2) preparation method of described dry powder latex paint for inner wall is characterized in that described prescription powder poured into to be stirred in the clear water mixing, and the weight ratio of powder and clear water is 1: 2-3, left standstill 10-12 minute, and stirred once more 2-3 minute.
(3) but this coating roller coating, spraying, brush application but should be used in temperature more than 5 ℃.
(4) dry powder latex paint that mixes with water is preferably in 7 days and uses up, and will stir before the construction.Cover tight cover again after residue coating must be built with the clean plastics film of one deck, be placed on shady and cool dry and comfortable place.
(5) storage temperature 0-35 ℃.The phase of depositing is 1 year, and the conformance with standard of exceeding the time limit still can be used.
The mechanism that the present invention prepares dry powder latex paint for inner wall is: the present invention is on the basis that fully research coating compatibility is learned, based on the rheology of non-Newtonian fluid, composite of mixture, the orthogonal method of test etc., select the film-forming polymer latex particle of structural performance for use with soft nuclear duricrust, make that film-forming polymer can be with the pulverulence stably stored, and the latex coating that makes just has good film forming properties under the plastification of water under high glass transition temperature; Select cellulase and multifunctional assistant, not only can improve the rheological property after dry powder latex paint is converted water, increase coating film gloss, improve the opacifying power of filming, improve the color stuffing dispersion efficiency, and in film process, multifunctional assistant can also be moved to the surface of filming earlier when the dry powder latex paint film forming, stop the too fast evaporation of moisture, thereby played the effect of softening agent, help the raising of complete formation of filming and film performance; The filler of different qualities is incorporated in the individual system, under the effect of the polymkeric substance that screening obtains with appropriate water-soluble type, good anti acid alkali performance, suitable redispersible and strong cohesive force, obtained performance and can satisfy many-sided dry powder latex paint for inner wall that requires, its film have good alkali resistance, water tolerance and washable wiping performance.Because the present invention preparation is a kind of dry powder latex paint, thereby it is real zero VOC latex coating, is the Green Chemistry industrial goods, has saved about 10 kinds of chemical substances---the auxiliary agent in traditional latex coating simultaneously, has saved ample resources; Dry powder latex paint is a pressed powder, can save the metal drum or the plastic tank packing of present fluid milk shellac varnish as cement paper bag packing (can be in bulk when using in a large number); Be convenient to transportation and preservation, never degenerate.
The finished product that the present invention forms are environmentally friendly dry powder latex paint for inner wall, its stable storing, convenient transportation, film performance satisfy the technical requirements of internal wall emulsion coating national standard (GB/T 9756-2001), and the product over-all properties reaches the international most advanced level of like product.Salient features is as shown in table 1.
The salient features of table 1 dry powder internal wall emulsion coating
| Project name | Standard GB/T 9756-2001 | Dry powder latex paint performance index of the present invention |
| Low-temperature stability | Never degenerate | Never degenerate |
| Application property | It is accessible to brush two roads | It is accessible to brush two roads |
| Time of drying (surface drying)/h | ≤2 | ≤1 |
| Appearance of film | Normally | Normally |
| Contrast ratio | ≥0.93 | ≥0.93 |
| Alkali resistance | 24h is no abnormal | 48h is no abnormal |
| Abrasion resistance/time | ≥1000 | 1200 |
In addition, the finished product that the present invention forms are environmentally friendly dry powder latex paint for inner wall, and its VOC can not detect (real zero VOC), and heavy metal chromium, cadmium, lead, mercury and halohydrocarbon (in methylene dichloride) etc. all can not detect; Odorlessness, non-stimulated to people's skin, respiratory tract, can move in immediately between the construction back room.
The present invention compared with prior art has following advantage and effect:
(1) the dry powder latex paint for inner wall biggest advantage of the present invention's formation is real zero VOC, is the Green Chemistry industrial goods, has saved about 10 kinds of chemical substances---the auxiliary agent in traditional latex coating simultaneously, has saved ample resources.
(2) products obtained therefrom of the present invention is a pressed powder, can save the metal drum or the plastic tank packing of present fluid milk shellac varnish as cement paper bag packing (can be in bulk when using in a large number), is convenient to transportation and prolonged preservation, never degenerates.
(3) products obtained therefrom easy construction of the present invention can brushing, roller coat or spraying application.
(4) the opacifying power height of products obtained therefrom of the present invention, can add 2-3 water doubly before the construction dilutes, thereby the dry powder latex paint for inner wall construction area of unit weight is big, theoretical value reach 25-35 square metre/(kilogram. layer), be applicable to the surface daub on a wall of indoor grey mud wall, concrete, masonry, gypsum, brick wall, plank, asbestos plate etc.
(5) but products obtained therefrom scumbling of the present invention construction, build is 20 μ m-200 μ m.
(6) the nontoxic odorlessness of products obtained therefrom of the present invention, non-stimulated to people's skin, respiratory tract, can move in immediately after the construction.
Embodiment
Embodiment 1
An old primary school classroom interior wall in rural area, somewhere is whitewashed.Prescription is (gross weight is in 100 kilograms): 10 kilograms of redispersible polymer latex powder, 37.8 kilograms of titanium dioxides, 40 kilograms of water-ground limestones, 5 kilograms of calcined kaolins, 6 kilograms of talcum powder, 0.4 kilogram of methyl cellulose ether, 0.6 kilogram of solid defoamer, 0.2 kilogram of multifunctional assistant.Inject earlier clear water during mixing in agitator, its amount stirred 15 minutes for 3 times of dry powder latex paint, left standstill then 10 minutes, and restir can use in 2 minutes.Owing to modify for many years, the body of wall control of dust is many, and the part metope comes off.Earlier old body of wall is cleared up, cleared away dust, root out floating layer and alkali layer, adopt putty that body of wall is repaired then.Beginning Puttying in the 5th day after having repaired is just done the back and is used sand papering smooth, begins to brush dry powder latex paint of the present invention after dry 15 days.Engineering completion back workmen thinks that coating of the present invention is constructed easily, fast drying, and the opacifying power height, prior advantage is the smell that this coating does not have any organic solvent, and is nontoxic, the workmen does not have the sensation of any discomfort.Therefore, they recommend to use other builder to adopt coating of the present invention strongly.Check to this primary school after 10 months, wall surface levelling, clean and tidy does not occur mouldy and phenomenon that come off.
Embodiment 2
Certain newly-built villa district moves in immediately for after building up, and eliminates the detrimentally affect of general coating to human body, has adopted product of the present invention to carry out interior wall and has covered with paint, lacquer, colour wash, etc.Prescription is (gross weight is in 100 kilograms): 30 kilograms of redispersible acrylic ester polymer latex powder, 40 kilograms of titanium dioxides, 10 kilograms of water-ground limestones, 9.1 kilograms of calcined kaolins, 10 kilograms of talcum powder, 0.5 kilogram of methyl cellulose ether, 0.2 kilogram of solid defoamer, 0.1 kilogram of multifunctional assistant, 0.1 kilogram of red iron oxide.Inject earlier clear water during mixing in agitator, its amount stirred 15 minutes for 2.5 times of dry powder latex paint, left standstill then 12 minutes, and restir can use in 3 minutes.
Convert dry powder latex paint behind the water and be adopt roll coating model be coated on the putty bottoming and smooth after metope on.Before roller coat, check the planeness and the adhesion condition of putty plaster, problematic body of wall is repaired.After the first pass construction, dry 2 hours, roller coat was second time then.This product does not have solvent odor, and is nontoxic, not environmental pollution, and therefore on the same day of construction, resident family just moves in rest.Check to villa after 6 months, the phenomenon of fading and coming off does not appear in wall surface levelling, clean and tidy.Listen resident family to say that this coating does not have any smell, keeping a public place clean property is good; In plum rain season, the interior metope that scribbles coating is not seen the dewfall phenomenon.The advantage of this coating obtains the approval of resident family.
Embodiment 3.
Certain market in order to improve the image of inside, market, needs the metope that former employing mosaic is decorated is overhauled transformation.Initial scheme is to root out old mosaic earlier, decorates with mosaic again.Because dry powder latex paint has abundant colors, its construction easily, odorlessness, pollution-free does not influence the market business, so scheme changes into and adopts product of the present invention to decorate.Prescription is (gross weight is in 100 kilograms): 40 kilograms of redispersible polymer latex powder, 10 kilograms of titanium dioxides, 13.5 kilograms of water-ground limestones, 20 kilograms of calcined kaolins, 5 kilograms of talcum powder, 0.1 kilogram of methyl cellulose ether, 0.4 kilogram of solid defoamer, 1.0 kilograms of multifunctional assistants, 10 kilograms of iron oxide yellow.Inject earlier clear water during mixing in agitator, its amount stirred 15 minutes for 2 times of dry powder latex paint, left standstill then 10 minutes, and restir can use in 2 minutes.The mosaic that will become flexible earlier before the use is rooted out, and after repairing, uses scraper blade coating water proof putty two to three times, the about 1.5mm of thickness.Carry out sanding and polishing after dry 15 hours, begin to spray dry powder latex paint of the present invention after dry 16 days.Wall leveling after the application is smooth.To field trip, except light contamination was arranged, the crack did not appear in metope, did not have hollowing yet, comes off and seriously faded phenomenon after 6 months.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100369405A CN101481584B (en) | 2009-01-23 | 2009-01-23 | Dry powder latex paint for inner wall and preparation thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100369405A CN101481584B (en) | 2009-01-23 | 2009-01-23 | Dry powder latex paint for inner wall and preparation thereof |
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| CN101481584B true CN101481584B (en) | 2011-03-16 |
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| CA2808421A1 (en) * | 2010-08-16 | 2012-02-23 | Dryvit Systems, Inc. | Non-cementitious dry finish compositions comprising a combination of film forming polymers |
| CN102010157B (en) * | 2010-09-30 | 2012-10-31 | 华南理工大学 | A kind of two-component environment-friendly inorganic polymer coating material and preparation method thereof |
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| CN109082186A (en) * | 2018-07-19 | 2018-12-25 | 大美泰康（天津）生态科技有限公司 | Multifunctional ecological coating without formaldehyde and VOC |
| CN109206951A (en) * | 2018-08-29 | 2019-01-15 | 曹佳男 | A kind of mould proof dry powder emulsion paint of environment-friendly type antibiotic and preparation method thereof |
| CN109852248B (en) * | 2018-12-26 | 2020-11-03 | 陕西碧廷实业有限公司 | Plant aromatic dry powder artistic coating and preparation method and use method thereof |
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2009
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