CN101445675A - Colored aluminum pigment with high color depth and preparation method thereof - Google Patents
Colored aluminum pigment with high color depth and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a colored aluminum pigment with high color depth and a preparation method thereof. The colored aluminum pigment is obtained by depositing a layer of silicon dioxide on a flaky metallic aluminum sheet substrate and then depositing one or more layers of metal oxide on the surface of the silicon dioxide, and the colored aluminum pigment exists in the form of dry powder. The preparation method comprises the following steps: a. stirring to disperse commercially available aluminum pigment slurry in alcohol, alcohol ether or a ketone solvent; b. regulating the temperature to 30-80 DEG C, respectively adding tetraethoxysilane and aqueous solution to the dispersed aluminum pigment slurry with the mol ratio of the tetraethylorthosilicate to the water ranging from 1:0.5 to 1:20, adding a catalyst such as ethylenediamine solution or aqueous ammonia, and obtaining aqueous aluminum pigment slurry by vacuum filtration and washing after the reaction; and c. cladding the aqueous aluminum pigment slurry obtained in the step b with the hydrated metal oxide on the powdered aluminum surface in a liquid phase. The preparation method help prepare the colored aluminum pigment with diversified colors and high color depth without reducing brightness of the original aluminum pigment slurry.
Description
Technical field
The present invention relates to colored aluminum pigment of a kind of high color density and preparation method thereof.
Background technology
Flake aluminum or aluminium face slurry are the effect pigments made from metallic aluminium with silvery white metalluster, be the metalloid pigment that present purposes is the widest, kind is maximum, can be used for different field such as automobile, material of construction, house decoraton, coating, Yin Mo, plant and instrument, household electrical appliance.Aluminium pigment covering power is fabulous, and is opaque to light, and energy reflect visible light, infrared rays, ultraviolet 60%-90% have thermolysis to solar light irradiation.Utilize its metallic luster do to decorate usefulness at first, develop into now to make and have multicoloured color, also present the metal bright spot simultaneously by jewelry.Therefore also increasing on the market to the demand of colored aluminum pigment.Colored aluminum pigment is a kind of flaky aluminum pigment through surface modification treatment, has both had the original metalluster of aluminium powder pigment, has chromatic colour simultaneously.Colored aluminum pigment is bright in luster with it, erosion resistance by force, not fugitive color, have strong characteristics such as metalluster, for the Color Range of widening metallic pigment has been opened up wide approach.
Colored aluminum pigment is the kind of nearest new development, preparation method commonly used has two kinds: the one, in high-temperature fluidized bed device, make the reaction of aluminium flake and ferric carboxylate or iron carbonyl painted, adjust parameters such as temperature of reaction and oxidated layer thickness, controlling the painted depth, this process manufacturing expense is big, yield poorly, industrialization enlarges to produce and is difficult for and certain danger arranged; Another process is that wet method is added to aluminium flake Surface Physical process with pigment, and use a kind of acrylic acid cross-linked polymer that pigment is consolidated in the aluminium surface, make product more stable, the colored aluminum pigment colour fastness that this process obtains is bad, the pigment that adds easily comes off, heatproof does not make product be subjected to a lot of limitation in final the application.
The market requirement of colored aluminium powder is increasing, answers market to require the method for the colored aluminium powder of manufacturing also more and more diversified.Patent CN1189177A has introduced the method for the colored aluminium powder of a kind of brand-new manufacturing, and it has adopted under the condition of pH value 7-12, in the mixture of the mixable solvent formation of water and one or more water, makes the pigment oxidation of sheet aluminum or aluminum alloy and obtains colour.Utilize colored aluminum pigment surface that this method obtains because oxidized brightness obviously descends, and depth of shade not ideal enough, be faint in color.Patent CN1673284A has introduced the anti-corrosion layer that a kind of utilization handled in nonaqueous system metal matrix comprises the laminar matrix that had handled with phosphate cpd and/or boronic acid compounds on its surface, and described metal matrix is further by being selected from one or more hydrated metal oxide layer of one or more metals of silicon, aluminium, zirconium and titanium as the sol-gel process coating of describing among the patent documentation JP-A-2003-41150.The intermediate layer that comprises aqua oxidation tin more thereon, coating hydrous iron oxide layer at last on the surface.The colored aluminium powder that utilizes this patent system to get can only obtain the blush aluminium powder, and the treatment process of metal base also is subjected to the restriction of patent documentation JP-A-2003-41150.
Summary of the invention
Technical problem to be solved of the present invention provides colored aluminum pigment of a kind of high color density and preparation method thereof, utilizes this preparation method to make color variation and the high colored aluminum pigment of depth of shade under the prerequisite that does not reduce the brightness of original aluminium face slurry.
The invention provides a kind of colored aluminum pigment of high color density, obtaining at one or more layers metal oxide layer of its surface deposition behind the sheet metal aluminium flake base material external sediment layer of silicon dioxide layer, this colored aluminum pigment exists with dry powder again.The present invention draws materials popular, and its described sheet metal aluminium flake base material that adopts can be commercially available oiliness or water-based aluminium face slurry, comprise floating type or non-floating type.That described aluminium face slurry can comprise the corn type or the silver dollar type.It is 5-200um that described aluminium face is starched its particle size range, and thickness is 0.1-5um.Described metal oxide layer is following in several one or more: aluminium sesquioxide layer, titanium dioxide layer, zirconium dioxide layer, hematite layer, magnetite layer, layer of wustite, iron titanate layer, chromium oxide layer, nickel oxide layer, manganese dioxide layer, cobalt oxide layer, cobalt sesquioxide layer, barba hispanica layer.The clad ratio of described silicon oxide is 1%-50%, and the clad ratio of metal oxide is 1%-200%.
The invention provides a kind of preparation method of colored aluminum pigment of above-mentioned high color density, may further comprise the steps:
A, with commercially available aluminium face slurry dispersed with stirring in alcohol, alcohol ether or ketone solvent;
B, temperature is transferred to 30-80 ℃, in scattered aluminium face slurry, add the tetraethoxy and the aqueous solution respectively, the mol ratio of tetraethoxy and water is 1:0.5 to 1:20, adds catalyzer ethylenediamine solution or ammoniacal liquor, reacts the filtering and washing that finishes and obtains water-based aluminium face slurry;
C, the water-based aluminium face slurry that the b step is obtained carry out the coating of hydrated metal oxide again on the aluminium powder surface under liquid phase.
Can also comprise that the colored aluminum pigment surface passes through the coating of silicon-dioxide, aluminium sesquioxide or lime borate again.Thereby can obtain the colored aluminium powder of weather-proof level, product can be used in the automobile finish field.
The invention has the beneficial effects as follows: aluminium is a kind of very active metal, in the time will being easy to oxidized aluminium base and being suspended in the coating of directly carrying out metal oxide in the water, can cause aluminium to follow acid or alkali direct reaction in water or the solution to produce hydrogen, thereby the brightness on aluminium surface is incurred loss, even make the aluminium base dissolving.Therefore the primary problem that solves of the present invention is exactly how to improve the resistance to acids and bases of aluminium face slurry, behind the commercially available organic solvent of aluminium face slurry elder generation with alcohol, ether or ketone flush away top layer, carry out surface bag silicon and handle in liquid phase, aluminium powder resistance to acids and bases after treatment can reach pH value 1-14; The coating of hydrated metal oxide is carried out on the aluminium powder surface of having handled well again, pH value, temperature by the hierarchy of control, coat layer of metal oxide compound or multiple layer metal oxide compound at its surface deposition, by selecting different metal oxides for use or coating one or more layers, can obtain the colored aluminium powder of the form and aspect such as red, orange, yellow, green, indigo plant of high color density.Therefore the present invention can make color variation and the high colored aluminum pigment of depth of shade under the prerequisite that does not reduce the brightness of original aluminium face slurry.This colored aluminum pigment is a dry powder, thereby has solved in the past the pulpous state product because oxidation easily, quality guaranteed period are short, easy shortcoming such as reunion.The colored aluminum pigment of high color density of the present invention is applicable to fields such as automobile finish coating, plastics, printing ink, makeup, printing printing and dyeing, finishing material.
The present invention is described in further detail below in conjunction with embodiment.
Embodiment
Invention example one
Get the floating type corn type aluminium face slurry of oiliness 60um 1KG (solid content is 0.7KG), disperse with the 5L dehydrated alcohol with propyl carbinol washing back, controlled temperature is between 30-70 ℃, add the 100g tetraethoxy and the 75ml aqueous solution, make catalyzer with quadrol, react the ageing that finishes and use the ethanol filtering and washing after 10 hours.With the slurry drained with the 15L water-dispersion good after, controlled temperature slow liquor ferri trichloridi of adding 50-80g/l and to keep pH value with diluted sodium hydroxide solution constant under 80 ℃, pH value 4.0 conditions.Stop to feed in raw material in reaction process when the aluminium powder color is orange-yellow in the reactor, then feed liquid filtering and washing to filtrate is not had chlorion, in 105 ℃ of following oven dry, it is SiO that 300-500 ℃ of following calcining 30min obtains the first layer
2Layer clad ratio is 1.8%, and the second layer is Fe
2O
3Layer clad ratio is 52% red colored aluminium powder.
(annotate: the clad ratio calculation formula is: this material mass in certain material clad ratio=finished product/finished product total mass * 100%; Down together)
The red aluminium powder that obtains is made coating card (5% addition, 200um is thick) with the PU resin on the black matrix paperboard to record data with the angular color measurement instrument as follows:
| Test angle | L * | a * | b * | C * | h * |
| 25° | 19.2 | 23.1 | 25.6 | 34.5 | 48.0 |
| 45° | 31.1 | 32.3 | 42.4 | 53.3 | 52.7 |
| 75° | 48.8 | 45.8 | 65.4 | 79.9 | 55.0 |
| Comprehensively | 38.7 | 38.3 | 52.8 | 65.2 | 54.1 |
Annotate: L* refers to brightness;
A* refers to red green coordinate (transverse axis) ,+be expressed as red phase ,-be expressed as green phase;
B* refers to champac coordinate (Z-axis) ,+be expressed as yellow phase ,-be expressed as blue phase;
C* refers to fullness of shade;
H* refers to hue-angle.
Last table integrated data a*, b* value have embodied these form and aspect and be in first quartile in the color coordinates axles, and wherein hue-angle is 54.1, is red pigment.Fullness of shade is 65.2, and brightness is 38.7, and the brightness of the employed original aluminum face slurry of this redness aluminium pigment is 39.5.The fullness of shade of red aluminium pigment has only 22.3 (making the coating card test of same prescription) in the domestic and international market.
Invention example two
The non-floating type silver dollar type aluminium face slurry 100g (solid content is 70%) of water intaking property 60um, disperse with the 1L dehydrated alcohol with butanone washing back, add and add 40ml distilled water stirring 30min after the 100g tetraethoxy stirs again, controlled temperature is at 50 ℃, slowly drip dilute ammonia solution, dropwise the feed liquid ageing clean after 10 hours with the dehydrated alcohol filtering and washing.
In the 2L beaker will on the slurry drained of step with the 1L water-dispersion good after, controlled temperature is transferred to pH value between the 2.0-3.0 with dilute hydrochloric acid at 75 ℃, slowly drips the titanium tetrachloride solution of 61ml, 1mol/l, and constant with dilute sodium hydroxide maintenance system pH value.Reinforced finishing is raised to 4.0 with dilute sodium hydroxide with pH value, slowly the liquor ferri trichloridi of Dropwise 5 0-80g/l.When feed liquid is gold in the beaker, stop to feed in raw material, stir slurry filtering and washing to the filtrate that reaction is finished behind the 30min and do not have chlorion, with filter cake transfer in the baking oven in 105 ℃ dry down, then 500 ℃ down calcining obtain the yellow color aluminium powder of high color density.
This gold aluminium powder structure is: the first layer SiO
2Layer, clad ratio is 19%; Second layer TiO
2Layer, clad ratio is 3.3%; The 3rd layer of Fe
2O
3Layer, clad ratio is 30%.
The above-mentioned yellow aluminium powder that obtains is made coating card (5% addition, 200um is thick) with the PU resin on the black matrix paperboard to record data with the angular color measurement instrument as follows:
| Test angle | L * | a * | b * | C * | h * |
| 25° | 25.7 | 7.7 | 31.0 | 32.0 | 76.1 |
| 45° | 44.8 | 9.4 | 46.2 | 47.2 | 78.5 |
| 75° | 75.1 | 13.4 | 70.7 | 72.0 | 79.3 |
| Comprehensively | 60.2 | 11.5 | 59.0 | 60.1 | 79.0 |
Annotate: L* refers to brightness;
A* refers to red green coordinate ,+be expressed as red phase ,-be expressed as green phase;
B* refers to the champac coordinate :+be expressed as yellow phase ,-be expressed as blue phase;
C* refers to fullness of shade;
H* refers to hue-angle.
Last table integrated data a*, b* value have embodied these form and aspect and be in first quartile in the pigment coordinate axis, and wherein hue-angle is 79.0, is yellow ultramarine.Fullness of shade is 60.1, and brightness is 60.2, and this yellow aluminium powder fullness of shade is considerably beyond yellow aluminium powder on the market.
Invention example three
Get the floating type silver dollar type aluminium face slurry of oiliness 60um 1KG (solid content is 0.7KG), spent glycol-methyl ether washing back disperses with the 10L dehydrated alcohol, controlled temperature is between 30-70 ℃, add the 300g tetraethoxy and the 1L aqueous solution, make catalyzer with quadrol, react the ageing that finishes and use the ethanol filtering and washing after 15 hours.With the slurry drained with the 10L water-dispersion good after, controlled temperature is transferred to 6.0 with dilute sodium hydroxide with pH value at 85 ℃, slowly drips 1mol/l CrCl
3Solution 2.6L, and it is constant to keep pH value with dilute sodium hydroxide.Filtering and washing was not to there being chlorion after the reinforced constant temperature that finishes stirred 30min, and in 105 ℃ of oven dry down, 300 ℃ of calcining 30min obtain the green aluminium powder of high color density with filter cake.This green aluminium pigment structure is the first layer SiO
2Clad ratio 7.2%, second layer Cr
2O
3Clad ratio 34.2%.
The green aluminium powder that obtains is made coating card (5% addition, 200um is thick) with the PU resin on the black matrix paperboard to record data with the angular color measurement instrument as follows:
| Test angle | L * | a * | b * | C * | h * |
| 25° | 20.6 | -6.7 | 9.7 | 11.8 | 124.7 |
| 45° | 38.6 | -9.6 | 14.9 | 17.7 | 122.8 |
| 75° | 62.5 | -13.7 | 22.7 | 26.5 | 121.1 |
| Comprehensively | 49.0 | -11.4 | 18.8 | 22.0 | 121.3 |
Annotate: L* refers to brightness;
A* refers to red green coordinate ,+be expressed as red phase ,-be expressed as green phase;
B* refers to the champac coordinate :+be expressed as yellow phase ,-be expressed as blue phase;
C* refers to fullness of shade;
H* refers to hue-angle.
Last table integrated data a*, b* value have embodied these form and aspect and be in second quadrant in the pigment coordinate axis, and wherein hue-angle is 121.3, is veridian.Fullness of shade is 22.0, and brightness is 49.0, does not also contain the green aluminium powder of organic pigment in the market.
Invention example four
The non-floating type silver dollar type aluminium face slurry 100g (solid content is 72g) of water intaking property 30um, disperse with the 1L dehydrated alcohol with propyl carbinol washing back, add and add 100ml distilled water stirring 30min after the 150g tetraethoxy stirs again, controlled temperature is at 50 ℃, slowly drip ethylenediamine solution, dropwise the feed liquid ageing clean after 10 hours with the dehydrated alcohol filtering and washing.
Above-mentioned slurry is dispersed in the 1L beaker with the 1000ml deionized water and stirring, constant temperature water bath is heated to 75 ℃ and with dilute hydrochloric acid pH value is transferred between the 2.0-3.0, slowly drip the titanium tetrachloride solution of 430ml, 1mol/l, and constant with dilute sodium hydroxide maintenance system pH value.Reinforced finishing is raised to 4.0 with dilute sodium hydroxide with pH value, the liquor ferri trichloridi of Dropwise 5 0-80g/l slowly, and stopped reaction when reaction paste is yellow, constant temperature stirs 30min.Slurry filtering and washing to the filtrate that reaction finishes is not had chlorion, filter cake is transferred in the baking oven in 105 ℃ of following dryings, then at the 300-500 ℃ of following orange aluminium powder that obtains high color density of calcining.The structure of this orange aluminium pigment is the first layer SiO
2Clad ratio 24%, second layer TiO
219%, the three layer of Fe of clad ratio
2O
3Clad ratio 17%.
The orange aluminium powder that obtains is made coating card (5% addition, 200um is thick) with the PU resin on the black matrix paperboard to record data with the angular color measurement instrument as follows:
| Test angle | L * | a * | b * | C * | h * |
| 25° | 19.4 | 15.9 | 28.1 | 32.2 | 60.5 |
| 45° | 35.0 | 22.1 | 49.1 | 53.8 | 65.7 |
| 75° | 56.0 | 31.3 | 72.8 | 79.3 | 66.7 |
| Comprehensively | 43.8 | 26.2 | 59.4 | 64.9 | 66.2 |
Annotate: L* refers to brightness;
A* refers to red green coordinate ,+be expressed as red phase ,-be expressed as green phase;
B* refers to the champac coordinate :+be expressed as yellow phase ,-be expressed as blue phase;
C* refers to fullness of shade;
H* refers to hue-angle.
Last table integrated data a*, b* value have embodied these form and aspect and be in first quartile in the pigment coordinate axis, and wherein hue-angle is 66.2, is orange pigments.Fullness of shade is 64.9, and brightness is 43.8.The trade mark that has only BASF AG to produce that is similar to this orange aluminium pigment in the market is the aluminium pigment of L2800, and its fullness of shade is 58.2, but it exists with pulpous state.
Invention example five
The non-floating type silver dollar type aluminium face slurry 500g (solid content is 360g) of water intaking property 30um, spent glycol-butyl ether washing back disperses with the 2.5L dehydrated alcohol, add and add 120ml distilled water stirring 30min after the 250g tetraethoxy stirs again, controlled temperature is at 50 ℃, slowly drip ethylenediamine solution, dropwise the feed liquid ageing clean after 15 hours with the dehydrated alcohol filtering and washing.
The slurry of above-mentioned processing is disperseed with the 5L deionized water and stirring, be warmed up to 75 ℃, pH value is transferred between the 2.0-3.0, and stream adds 6g/l ferric chloride Solution 5L and 33g/l potassium ferrocyanide solution 5L with dilute hydrochloric acid.And constant with dilute hydrochloric acid or the constant pH value of weak ammonia, the reinforced back constant temperature that finishes washs the back in 105 ℃ of oven dry down with the feed liquid vacuum filtration after stirring 30min, obtains the blue aluminium powder of high color density.This blueness aluminium pigment structure is the first layer SiO
2Clad ratio 9.3%, second layer barba hispanica clad ratio 44%.
The blue aluminium powder that obtains is made coating card (5% addition, 200um is thick) with the PU resin on the black matrix paperboard to record data with the angular color measurement instrument as follows:
| Test angle | L * | a * | b * | C * | h * |
| 25° | 32.1 | -12.3 | -22.9 | 26.0 | 241.7 |
| 45° | 48.7 | -18.2 | -28.1 | 33.5 | 237.1 |
| 75° | 67.8 | -24.7 | -33.5 | 41.6 | 233.6 |
| Comprehensively | 55.0 | -20.4 | -29.4 | 35.8 | 235.3 |
Annotate: L* refers to brightness;
A* refers to red green coordinate ,+be expressed as red phase ,-be expressed as green phase;
B* refers to the champac coordinate :+be expressed as yellow phase ,-be expressed as blue phase;
C* refers to fullness of shade;
H* refers to hue-angle.
Last table integrated data a*, b* value have embodied these form and aspect and be in four-quadrant in the pigment coordinate axis, and wherein hue-angle is 235.3, is blue pigments.Fullness of shade is 35.8, and brightness is 55.0, does not also contain the blue aluminium powder of organic pigment in the market.
Invention example six
The non-floating type silver dollar type aluminium face slurry 100g (solid content is 70g) of water intaking property 100um, disperse with the 1L dehydrated alcohol with propyl carbinol washing back, add and add 100ml distilled water stirring 30min after the 150g tetraethoxy stirs again, controlled temperature is at 50 ℃, slowly drip ethylenediamine solution, dropwise the feed liquid ageing clean after 10 hours with the dehydrated alcohol filtering and washing.
With the aluminium powder after above-mentioned the handling well with the distilled water dispersed with stirring of 1L in the beaker of 2L, be warmed up to 75 ℃, transfer pH value to 5.5 with dilute hydrochloric acid or dilute sodium hydroxide, slowly drip 100g/l liquor alumini chloridi 220ml, and constant with the constant pH value of dilute sodium hydroxide.Regulate pH value to 3.0 with dilute hydrochloric acid behind the reinforced stirring 15min that finishes, slowly drip the mixed solution 420ml of iron(ic) chloride and titanium tetrachloride, ferric chloride concn is that 50g/l, titanium tetrachloride concentration are 100g/l in this mixed solution.Behind reinforced the finishing, do not have chlorion with the distilled water filtering and washing to filtrate till, filter cake is dried down at 105 ℃, calcine 30min, obtain orange aluminium pigment for 300 ℃.This orange aluminium pigment structure is: the first layer is the SiO2 layer, clad ratio 28.8%; The second layer is the Al2O3 layer, clad ratio 5.6%; The 3rd layer is the iron titanate layer, and clad ratio is 18.73%.
The orange aluminium powder that obtains is made coating card (5% addition, 200um is thick) with the PU resin on the black matrix paperboard to record data with the angular color measurement instrument as follows:
| Test angle | L * | a * | b * | C * | h * |
| 25° | 20.7 | 17.7 | 26.0 | 31.4 | 55.8 |
| 45° | 34.4 | 25.1 | 42.3 | 49.2 49.2 | 59.3 59.3 |
| 75° | 53.7 | 36.4 | 63.6 | 73.2 | 60.2 |
| Comprehensively | 42.5 | 30.4 | 51.5 | 59.8 | 59.5 |
Annotate: L* refers to brightness;
A* refers to red green coordinate ,+be expressed as red phase ,-be expressed as green phase;
B* refers to the champac coordinate :+be expressed as yellow phase ,-be expressed as blue phase;
C* refers to fullness of shade;
H* refers to hue-angle.
Invention example seven
Get the non-floating type silver dollar type aluminium face slurry 100g (solid content is 75g) of oiliness 15um, spent glycol-butyl ether washing back disperses with the 1.5L dehydrated alcohol, add and add 80ml distilled water stirring 60min after the 120g tetraethoxy stirs again, controlled temperature is at 50 ℃, slowly drip ethylenediamine solution, dropwise the feed liquid ageing totally standby after 15 hours with the dehydrated alcohol filtering and washing.
80 gram KMnO4 are dissolved in the 1L water, in this solution, add the above-mentioned aluminium powder of handling well then, stir and be warmed up to 40 ℃, slowly add 20ml ammoniacal liquor, with dilute hydrochloric acid pH value is adjusted to 10 again.After the insulation reaction 2 hours, filtration washing, then 105 ℃ of oven dry, 300 ℃ of calcining 30min obtain the dark yellow aluminium powder.This aluminium powder structure is: the first layer SiO2 layer, clad ratio are 22.5%, and second layer MnO2 layer, clad ratio are 28.6%.
The dark yellow aluminium powder that obtains is made coating card (5% addition, 200um is thick) with the PU resin on the black matrix paperboard to record data with the angular color measurement instrument as follows:
| Test angle | L * | a * | b * | C * | h * |
| 25° | 26.0 | 4.5 | 19.2 | 19.7 | 76.9 |
| 45° | 46.1 | 3.2 | 28.6 | 28.8 | 83.6 |
| 75° | 78.0 | 3.6 | 47.6 | 47.8 | 85.6 |
| Comprehensively | 62.4 | 3.6 | 40.3 | 40.4 | 84.8 |
Annotate: L* refers to brightness;
A* refers to red green coordinate ,+be expressed as red phase ,-be expressed as green phase;
B* refers to the champac coordinate :+be expressed as yellow phase ,-be expressed as blue phase;
C* refers to fullness of shade;
H* refers to hue-angle.
Invention example eight
Get invention example one sample 100g and disperse, be warmed up to 50-80 ℃, transfer pH value to 8.5-10.0, slowly add the sodium silicate solution of 150ml50g/l with dilute sodium hydroxide with 1L distilled water, constant in the reinforced process with the constant pH value of dilute hydrochloric acid.Reinforced finishing transferred to feed liquid in the B, is washed with distilled water to till the no chlorion.Filter cake is transferred in the baking oven, and dry under 105 ℃, 500 ℃ of calcining 30min just can obtain surperficial coated Si O then
2The red aluminium pigment of weather-proof level of layer, the SiO2 clad ratio is 3.5%.
Invention example nine
Get invention example one sample 50g, be dispersed in the 1L beaker with 500ml distilled water, be warmed up to 75 ℃, regulate pH value to 5.5-6.5 with dilute hydrochloric acid, the liquor alumini chloridi 200ml that slowly adds 30g/l, and constant with the constant pH value of dilute sodium hydroxide, the reinforced filtering and washing that finishes is dried back calcining 30min under 300-500 ℃ down in 105 ℃ and just can be obtained surface coating Al to there not being chlorion
2O
3The red aluminium pigment of weather-proof level, Al
2O
3Clad ratio be 4.4%.
Invention example ten
Get invention example one sample 50g, be dispersed in the 1L beaker with 500ml distilled water, be warmed up to 85 ℃ after disposable adding borax 3.85g, stir 30min after, regulate pH value to 7.0.Slowly in pot, add 20g/l calcium chloride solution 56ml, the 30min filtering and washing is stirred to there not being chlorion in the reinforced back that finishes, 105 ℃ of oven dry, 300 times calcining 30min just can obtain the red aluminium pigment of weather-proof level that the surface coats lime borate, and the clad ratio of lime borate is 3.8%.
Claims (9)
1, a kind of colored aluminum pigment of high color density is characterized in that obtaining at one or more layers metal oxide layer of its surface deposition behind the sheet metal aluminium flake base material external sediment layer of silicon dioxide layer, this colored aluminum pigment exists with dry powder again.
2, the colored aluminum pigment of high color density according to claim 1 is characterized in that described sheet metal aluminium flake base material is commercially available oiliness or water-based aluminium face slurry, comprise floating type or non-floating type.
3, the colored aluminum pigment of high color density according to claim 2 is characterized in that described aluminium face slurry comprises the corn type or the silver dollar type.
4, the colored aluminum pigment of high color density according to claim 3 is characterized in that it is 5-200um that described aluminium face is starched its particle size range, and thickness is 0.1-5um.
5,, it is characterized in that described metal oxide layer is following in several one or more: aluminium sesquioxide layer, titanium dioxide layer, zirconium dioxide layer, hematite layer, magnetite layer, layer of wustite, iron titanate layer, chromium oxide layer, nickel oxide layer, manganese dioxide layer, cobalt oxide layer, cobalt sesquioxide layer, barba hispanica layer according to the colored aluminum pigment of claim 1 or 2 or 3 or 4 described high color densities.
6, according to the colored aluminum pigment of claim 1 or 2 or 3 or 4 described high color densities, the clad ratio that it is characterized in that described silicon oxide is 1%-50%, and the clad ratio of metal oxide is 1%-200%.
7, the colored aluminum pigment of high color density according to claim 5, the clad ratio that it is characterized in that described silicon oxide is 1%-50%, the clad ratio of metal oxide is 1%-200%.
8, the preparation method of the colored aluminum pigment of each described high color density of claim 1 to 7 is characterized in that may further comprise the steps:
A, with commercially available aluminium face slurry dispersed with stirring in alcohol, alcohol ether or ketone solvent;
B, temperature is transferred to 30-80 ℃, in scattered aluminium face slurry, add the tetraethoxy and the aqueous solution respectively, the mol ratio of tetraethoxy and water is 1:0.5 to 1:20, adds catalyzer ethylenediamine solution or ammoniacal liquor, reacts the filtering and washing that finishes and obtains water-based aluminium face slurry;
C, the water-based aluminium face slurry that the b step is obtained carry out the coating of hydrated metal oxide again on the aluminium powder surface under liquid phase.
9, the preparation method of the colored aluminum pigment of high color density according to claim 8 is characterized in that also comprising that the colored aluminum pigment surface passes through the coating of silicon-dioxide, aluminium sesquioxide or lime borate again.
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Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260421A (en) * | 2011-06-08 | 2011-11-30 | 四川大学 | Magic-color nacreous aluminum powder pigment and preparation method thereof |
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2008
- 2008-12-12 CN CNA2008101631138A patent/CN101445675A/en active Pending
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