CN102002266A - Preparation method of silver dollar-shaped aluminum pigment - Google Patents
Preparation method of silver dollar-shaped aluminum pigment Download PDFInfo
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- CN102002266A CN102002266A CN2010105240639A CN201010524063A CN102002266A CN 102002266 A CN102002266 A CN 102002266A CN 2010105240639 A CN2010105240639 A CN 2010105240639A CN 201010524063 A CN201010524063 A CN 201010524063A CN 102002266 A CN102002266 A CN 102002266A
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 51
- 239000000049 pigment Substances 0.000 title claims abstract description 36
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 17
- 239000004332 silver Substances 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 4
- 238000000498 ball milling Methods 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 12
- 239000004411 aluminium Substances 0.000 claims description 40
- 239000000843 powder Substances 0.000 claims description 28
- 238000000227 grinding Methods 0.000 claims description 7
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims 1
- -1 aluminum-silver Chemical compound 0.000 abstract description 9
- 229940023462 paste product Drugs 0.000 abstract description 2
- 238000003801 milling Methods 0.000 abstract 4
- 239000002904 solvent Substances 0.000 description 21
- 239000012065 filter cake Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- 239000002609 medium Substances 0.000 description 11
- 238000007599 discharging Methods 0.000 description 10
- 238000001914 filtration Methods 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000000706 filtrate Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 7
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 6
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 6
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 6
- 239000005642 Oleic acid Substances 0.000 description 6
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 6
- 235000021355 Stearic acid Nutrition 0.000 description 6
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 6
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 6
- 238000012856 packing Methods 0.000 description 6
- 239000003973 paint Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000008117 stearic acid Substances 0.000 description 6
- 239000003963 antioxidant agent Substances 0.000 description 5
- 230000003078 antioxidant effect Effects 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 229910000677 High-carbon steel Inorganic materials 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000002612 dispersion medium Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000001238 wet grinding Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 150000002632 lipids Chemical class 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- KHPFIDDXCRYEHS-UHFFFAOYSA-N 2-butyloctadecanoic acid Chemical compound CCCCCCCCCCCCCCCCC(C(O)=O)CCCC KHPFIDDXCRYEHS-UHFFFAOYSA-N 0.000 description 1
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229940058344 antitrematodals organophosphorous compound Drugs 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000003701 mechanical milling Methods 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 235000012771 pancakes Nutrition 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 235000003441 saturated fatty acids Nutrition 0.000 description 1
- 150000004671 saturated fatty acids Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Abstract
The invention provides a preparation method of a silver dollar-shaped aluminum pigment, which is characterized by comprising the step of carrying out three-stage wet-method ball milling on D50 among aluminum powder with the diameter of 5-8 mum, wherein the diameters of milling balls is within 1.0-3.0 mm, milling balls with the density of 7.0-9.0 g/cm<3> is adopted in the first-stage ball milling, milling balls with the density of 5.0-6.9 g/cm<3> is adopted in the second-stage ball milling, and milling balls with the density of 2.0-4.0 g/cm<3> is adopted in the third-stage ball milling. The surfaces of particles in the tablet-shaped aluminum pigment produced with the method are smooth and clean so that the high glossiness, whiteness and metallic feel of an aluminum-silver paste product are ensured.
Description
Technical field
The present invention relates to the metallic pigment field, relate to the production method of aluminium pigment particularly.
Background technology
Aluminium pigment is effective pigment, is characterised in that metalluster and very big covering power thereof that it is unique.Because the laminate structure of this effective pigment, it can be parallel to substrate orientation in paint medium, and owing to many independently small minute surfaces produce metal effect.This metal effect performance is very obvious, especially in the wet paint.For the lacquer of panchromatic accent, producing this effect is owing to depend on the bright effect of viewing angle and/or incident angle, also claims " changeable colors along with angle ".Excellent down flop property is subjected to many property effects of pigment: its orientation, particle diameter and size distribution, superficial makings (roughness) and edge texture are all played a role.
The prior feature of metallic paint or printing-ink is its high glossiness.Glossiness still is physiology or psychological relevant variable, and the brightest aluminium pigment with high glossiness and changeable colors along with angle is divided into two classes at present: a class makes " silver dollar pigment " by the wet-milling ball aluminum powder, and another kind of is " PVD pigment ".
The wet production of existing silver dollar pigment all adopts one section ball milled, promptly the big steel ball of a usefulness 1mm-16.0mm with Grenaille ball mill crushing slabbing once, disclosed as CN100455631, CN1997711, EP0451785 and US4218747, thus obtained flaky aluminum pigment, this area are called corn flakes shape and common silver dollar type pigment.This surface of pigments is smooth inadequately, and particle shape is irregular, and size-grade distribution is wide, causes glossiness and whiteness poor, a little less than the metal sense.
Summary of the invention
Therefore the present invention proposes a kind of preparation method of silver dollar shape aluminium pigment, and aluminium granules of pigments out-of-shape, glossiness that existing method obtains are low to overcome, the defective of metal sense difference.
The present invention proposes a kind of modified version silver dollar shape aluminium method for preparing pigment, it is characterized in that, with d
50Minute spherical aluminium powder between 5-8 μ m carries out three grades of wet ball grindings, and used ball radius is between 1.0-3.0mm, and wherein, the density of first step abrading-ball is 7.0-9.0g/cm
3The density of second stage ball milling is 5.0-6.9g/cm
3The density of third stage abrading-ball is 2.0-4.0g/cm
3Through screening, press filtration is mediated and is made flaky aluminum pigment.Adopt the surface smoothing of the flaky aluminum granules of pigments that this method makes bright and clean, guaranteed the high glossiness of aluminium-silver slurry product, high whiteness and high-metal-sense.
The present invention is owing to adopt multistage ball milling method, different steps in aluminium powder deformation, adopt the ball-milling medium of different densities, remain the minute spherical aluminium powder is carried out the operation of gentleness commentaries on classics shape, make the surface smoothing of flaky aluminum granules of pigments bright and clean, narrow particle size distribution has been guaranteed the high glossiness of aluminium-silver slurry product, high whiteness and high-metal-sense.
Description of drawings
Fig. 1 is the SEM photo of the silver dollar pigment of existing wet grinding technology acquisition;
Fig. 2 is the SEM photo according to the silver dollar pigment of the inventive method acquisition.
Embodiment
Below will the method for silver dollar shape aluminium pigment of the present invention be specifically described, those skilled in the art should understand that following specific descriptions are for the ease of understanding the present invention, not being used for limiting protection scope of the present invention.
In the present invention, term " ball-milling medium ", " mill is situated between " and " abrading-ball " have substantially the same meaning, can exchange use, are meant the material that is used for wet-milling aluminium pigment.Abrading-ball is not to refer to proper sphere material, and it can be ellipsoid, spheroid or other irregular shapes, but should have level and smooth surface usually, and in other words, the abrading-ball surface can not have pointed corner angle or burr.
A key character of the present invention is to adopt three grades of Media density gradient sphere grinding technologies, to obtain the silver dollar shape aluminium pigment of high glossiness, high whiteness, strong metal sense.
First step ball milling adopt diameter between 1.0-3.0mm, material density is at 7.0-9..0g/cm
3The standard sphere material be situated between as ball milling mill, with d
50Minute spherical aluminium powder and organic solvent, dispersant at 5-8 μ m are placed on ball milling in the ball mill.Usually grasp the degree that the first step is ground by the radius-thickness ratio of control aluminium powder.So-called radius-thickness ratio is meant through the mean diameter of the pancake shape aluminum particulate after the first step grinding and the ratio of thickness.In the present invention, preferably stop the first step and grind when radius-thickness ratio reaches between the 20-35, this needs 8-15 hour usually.Solid-liquid separation is carried out in discharging after the first step is ground and finished, and filter cake is scattered in the same solvent again, prepares second stage ball milling.
Feed liquid enters second stage ball mill, the second stage adopt diameter greater than 1.0mm less than 3mm, material density at 5.0-6.9g/cm
3The standard sphere material be situated between as ball milling mill, the radius-thickness ratio that preferably aluminium powder is ground to 35-50 stops, this needs 10-20 hour time usually.Carry out solid-liquid separation then, filter cake is scattered in the same solvent again, prepares third stage ball milling.
Feed liquid enters third stage ball mill, the third stage adopt diameter greater than 1.0mm less than 3mm, material density at 2.0-4.0g/cm
3The standard sphere material be situated between as ball milling mill, ball milling to the L15 value (characterizing gloss degree) of aluminium powder progressively improves, and does not have obvious raising (L15 raising＜0.2%) time after half an hour and stop continuing ball milling, needs 10-20 hour usually.
Third stage ball milling finishes the back discharging, by the screening of 500 eye mesh screens, and press filtration, filtrate is got back to the ball milling operation and is recycled.Filter cake adds in the kneader, adds a spot of antioxidant simultaneously, and after a spot of dispersion agent and the proper amount of solvent, solid content becomes 70% and mediates processing 1 hour, and packing promptly becomes high glossiness, high whiteness and high-metal-sense aluminum silver paste product.
The present invention adopts the abrading-ball density gradient of successively decreasing, and first step ball milling adopts high-density medium, and at the preliminary stage that aluminium powder deformation takes place, high-density medium can provide bigger shearing force and bigger transmission ofenergy, helps to improve grinding efficiency.After the deformation of aluminium powder reaches certain degree, adopt second stage ball milling.Density medium during second stage ball milling adopts reduces shearing force and transmission ofenergy, and the deformation of aluminium powder is further carried out under relatively mild condition, guaranteed simultaneously the preliminary aluminium powder of sheetization the deformation of fierceness does not too appear and ftracture, fragmentation.Third stage ball milling adopts low-density medium, further aluminium powder is processed, the main purpose of this step is to finish sheet processing and to the modification of polishing of aluminium powder surface, guarantee that aluminium powder has the good appearance pattern under the gentleest condition, smooth surface, smooth, neat in edge, mellow and full.
The selection of ball-milling medium
In the present invention, first step ball milling adopts the mill of particle diameter between 1-3mm to be situated between.If particle diameter is too small at single mill ball quality less than 1mm, is difficult to aluminium powder is caused effective impact, thereby reduces grinding efficiency; If particle diameter is greater than 3mm, then the space is too big between abrading-ball, is difficult to abundant extruded aluminium powder particles, reduces the validity of ball milling equally.The preferred particle diameter of the present invention is between 1.8-2.2mm.First step ball milling preferably uses density at 7.0-9.0g/cm
3Between abrading-ball.If density is less than 7.0g/cm
3, then mill ball quality kicks the beam, and needs the long one-level ball milling time, corresponding reduction production efficiency; If density is excessive, then excessive to the surging force of aluminum particle, may make the crack at edge of aluminum particulate.In actual production, consider the being easy to get property of material, first step ball milling adopts high-carbon steel ball, bearing steel ball or Stainless Steel Ball.But the present invention is not limited to this, and density is at 7.0-9.0g/cm
3Other materials (normally metallic substance) also is suitable in the scope.
The second stage of the present invention ball milling preferably uses density at 5.0-6.9g/cm
3Between abrading-ball, to reduce shearing force and transmission ofenergy, the deformation of aluminium powder is further carried out under relatively mild condition, guaranteed that the preliminary aluminium powder of sheetization the deformation of fierceness too do not occur and causes phenomenons such as cracking, fragmentation.If density is less than 5.0g/cm
3, then mill ball quality kicks the beam, and needs the long one-level ball milling time, corresponding reduction production efficiency.In a specific embodiment provided by the invention, it is that mill is situated between that second stage ball milling preferably adopts zirconia ball, and density is at 5.95-6.05g/cm
3Between.But the present invention is not limited to this, and density is at 5.0-6.9g/cm
3Other materials in the scope also is suitable for.
Mill Jie density of third stage ball milling suits at 2.0-4.0g/cm
3Between, the alumina balls that can buy on the market, agate ball or glass sphere are good selections, their density is at 2.3-3.6g/cm
3Between.
Dispersion medium
Use solvent as dispersion medium, choice of Solvent need not strict be controlled, and can use common solvent, and for example, mineral oil, petroleum naphtha can also use alcohol (for example Virahol), ether, ketone, ester etc., and other traditional ball milling solvent all can be selected.Solvent and aluminium powder weight ratio are 2.5 to 10, and abrading-ball and aluminium powder weight ratio be 20 to 110, and make with lubricator as grinding aid.Equally, can make water (at least as major portion) as solvent.
Ball-milling additive
As lubricant, can adopt alkyl fatty acid with 10 to 24 carbon atoms, it uses for many years.The preferred saturated or unsaturated fatty acids that uses C12-C18 as stearic acid, oleic acid, lauric acid, tetradecanoic acid, Unimac 5680, butyl stearic acid etc., also can adopt ester, amine salt, acid amides and the oligopolymer etc. of above-mentioned carboxylic acid.When using stearic acid, formed and floated pigment as lubricant.On the other hand, use oleic acid to form the non-pigment that floats.Float pigment and be characterised in that they are buoyant in paint medium (for example lacquer or printing-ink), promptly they swim on the surface of paint medium.On the other hand, non-ly float pigment and in paint medium, assemble, for example also the long-chain aminocompound can be added in the lipid acid.Lipid acid can come from animal or plant.Equally, organo phosphorous compounds can be used as lubricant.Under the situation that makes water as dispersion medium, institute with lubricator should have significant corrosion-resisting function, preferably phosphoric acid ester or phosphorous acid ester.
In mechanical milling process, can add other auxiliary agents as required, corrosion inhibitor for example is as benzotriazole or amine substance; The homogenate agent is as various organosilicons, fluorine-containing tensio-active agent; Anti-heavy agent, for example organic bentonite, polyethylene wax, polyamide wax, aerosil etc.
Embodiment 1:
The diameter of packing in Φ 1100 * 1200 horizontal ball mills is the high-carbon steel ball 2000kg of 2mm, adds 200# solvent oil (petroleum naphtha) 300kg, D
50Be the nitrogen atomization minute spherical aluminium powder 80kg of 5-6 micron, oleic acid 3kg, ball milling 10h, discharging, press filtration.Filtrate is returned the ball milling operation, and the filter cake adding is equipped with in Φ 1100 * 1200 horizontal ball mills of 1500kg, 2.0mm zirconium ball, adds 200# solvent oil 300kg, oleic acid 1.5kg, and ball milling 15h, discharging, press filtration, filtrate is returned the ball milling operation; Filter cake adds in Φ 1100 * 1200 horizontal ball mills of the glass sphere 1000kg that 1.5mm is housed, adds 200# solvent oil 300kg, oleic acid 1kg, and ball milling 20h, discharging, 500 mesh sieve branches, press filtration, filtrate is returned the ball milling operation.Filter cake adds in the kneader, adds a spot of antioxidant simultaneously, and after a spot of dispersion agent and the proper amount of solvent, solid content becomes 70%.Mediate and handled 1 hour, packing is the silver dollar shape flaky aluminum pigment of high glossiness, strong metal sense.
Comparative Examples 1
The 2mm high-carbon steel ball 2000kg that packs in Φ 1100 * 1200 horizontal ball mills adds 200# solvent oil 300kg, D
50Be the nitrogen atomization minute spherical aluminium powder 80kg of 5-6 micron, oleic acid 3kg, ball milling 20h, discharging, 500 mesh sieve branches, press filtration.Filter cake adds in the kneader, adds a spot of antioxidant simultaneously, and after a spot of dispersion agent and the proper amount of solvent, solid content becomes 70%.Mediate and handled 1 hour, packing promptly gets common silver dollar shape aluminium pigment.
Embodiment 2
The 3mm Stainless Steel Ball 2000kg that packs in Φ 1100 * 1200 horizontal ball mills adds 200# solvent oil 300kg, D
50Be the nitrogen atomization minute spherical aluminium powder 80kg of 7-8 μ m, stearic acid 3kg, ball milling 8h, discharging, press filtration.Filtrate is returned the ball milling operation.Filter cake adds in Φ 1100 * 1200 horizontal ball mills of the zirconia ball 1500kg that 2mm is housed, adds 200# solvent oil 300kg, stearic acid 2kg, and ball milling 10h, discharging, press filtration, filtrate is returned the ball milling operation; Filter cake adds in Φ 1100 * 1200 horizontal ball mills of the glass sphere 1000kg that 1.5mm is housed, adds 200# solvent oil 300kg, stearic acid 2kg, and ball milling 15h, discharging, 500 mesh sieve branches, press filtration, filtrate is returned the ball milling operation; Filter cake adds in the kneader, adds a spot of antioxidant simultaneously, and after a spot of dispersion agent and the proper amount of solvent, solid content becomes 70%.Mediate and handled 1 hour, packing is the silver dollar shape aluminium pigment of high glossiness, strong metal sense.
Comparative Examples 2
The 2mm high-carbon steel ball 2000kg that packs in Φ 1100 * 1200 horizontal ball mills adds 200# solvent oil 300kg, D
50Be the nitrogen atomization minute spherical aluminium powder 80kg of 7-8 micron, stearic acid 3kg, ball milling 20h, discharging, 500 mesh sieve branches, press filtration, filter cake adds in the kneader, adds a spot of antioxidant simultaneously, and after a spot of dispersion agent and the proper amount of solvent, solid content becomes 70%.Mediate and handled 1 hour, packing is common silver dollar type product.
Above-mentioned each sample is carried out color difference analysis, get above-mentioned sample 1 gram through mediating, add thermoplastic acrylic varnish 10 grams, Tianna solution 20 grams after mixing, spray on the ABS sheet, 30min oven dry under 60 ℃ of conditions.With Xrite MA-68 type spectrophotometer measurement aberration, measuring result is listed in the table 1.In table 1, L15, L45 and L110 are respectively the data that obtain from 15 degree, 45 degree and the catoptrical intensity of 110 degree angular measurements, are used to characterize the parameter of tested powder optical property, and the L15 value is big more, and the expression glossiness is high more; The L45 value is big more, and the expression whiteness is high more; The L110 value is big more, and the expression glossiness is poor more, and promptly the aluminium powder surface is coarse more.From data as can be seen, through the product of art breading of the present invention, whiteness and brightness all obviously will be higher than traditional technology.
The color difference measurement result of each sample of table 1.
Fig. 1 and Fig. 2 are respectively the SEM photos of Comparative Examples 1 and embodiment 1 gained sample, can find out from photo, and significantly breaking appears in the product of contrast 1, edge, and slightly make on the surface; And adopt the product periphery of the inventive method complete, mellow and full, smooth surface.
Abovely embodiments of the present invention are described, but these embodiments only are for exemplary purposes rather than restriction the present invention in conjunction with preferred embodiment.It should be understood that those skilled in the art can be under the prerequisite that does not deviate from scope and spirit of the present invention, change and revise for embodiment.Similarly, except above-mentioned embodiment, can also find many embodiments in the appended claims.
Claims (5)
1. the preparation method of a silver dollar shape aluminium pigment is characterized in that, with d
50Aluminium powder between 5-8 μ m carries out three grades of wet ball grindings, used ball radius between 1.0-3.0mm, wherein,
It is 7.0-9.0g/cm that first step ball milling adopts density
3Abrading-ball;
It is 5.0-6.9g/cm that second stage ball milling adopts density
3Abrading-ball;
It is 2.0-4.0g/cm that third stage ball milling adopts density
3Abrading-ball.
2. method according to claim 1, wherein, the described first step is ground and is stopped when the radius-thickness ratio of aluminum particle reaches between the 10-35.
3. method according to claim 1, wherein, the described second stage is ground and is stopped when the radius-thickness ratio of aluminum particle reaches between the 35-50.
4. method according to claim 1 wherein, when the L15 of aluminium powder value progressively improves, and is continuing to stop the described third stage ball milling when ball milling does not have obviously raising again after half an hour.
5. method according to claim 1, wherein, the diameter of described abrading-ball is between 1.8-2.2mm.
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| CN103627220A (en) * | 2013-12-12 | 2014-03-12 | 重庆诺泰颜料有限公司 | Preparation method of environment-friendly aluminium pigment |
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| CN107868342B (en) * | 2017-10-25 | 2020-02-14 | 金发科技股份有限公司 | Spraying-free polypropylene composition and preparation method thereof |
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| CN111454593A (en) * | 2020-04-17 | 2020-07-28 | 安徽赛尔新材料科技有限公司 | Preparation method of mercerizing electroplating-grade aluminum paste |
| CN112317754A (en) * | 2020-11-18 | 2021-02-05 | 贵州振华电子信息产业技术研究有限公司 | Sheet ball-milling tantalum powder and preparation method and application thereof |
| CN112812602A (en) * | 2020-12-31 | 2021-05-18 | 长沙族兴新材料股份有限公司 | Preparation method of electroplating-imitated aluminum powder pigment for powder coating and aluminum powder pigment |
| CN113980495A (en) * | 2021-11-29 | 2022-01-28 | 曲靖华益兴新材料有限公司 | Safe coated aluminum powder for aluminum pigment production and preparation method thereof |
| CN116004038A (en) * | 2022-11-21 | 2023-04-25 | 合肥旭阳铝颜料有限公司 | Excellent silver-element type aluminium pigment and its preparing process |
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