CN107400394A - A kind of pearlescent pigment for being directly used in electrostatic powder coating and preparation method thereof - Google Patents
A kind of pearlescent pigment for being directly used in electrostatic powder coating and preparation method thereof Download PDFInfo
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- CN107400394A CN107400394A CN201610334699.4A CN201610334699A CN107400394A CN 107400394 A CN107400394 A CN 107400394A CN 201610334699 A CN201610334699 A CN 201610334699A CN 107400394 A CN107400394 A CN 107400394A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/0015—Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
- C09C3/063—Coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C2200/00—Compositional and structural details of pigments exhibiting interference colours
- C09C2200/10—Interference pigments characterized by the core material
- C09C2200/102—Interference pigments characterized by the core material the core consisting of glass or silicate material like mica or clays, e.g. kaolin
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C2200/00—Compositional and structural details of pigments exhibiting interference colours
- C09C2200/40—Interference pigments comprising an outermost surface coating
- C09C2200/401—Inorganic protective coating
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- Life Sciences & Earth Sciences (AREA)
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Abstract
One kind is provided and is directly used in electrostatic powder coating pearlescent pigment and preparation method thereof.The pearlescent pigment of the present invention is included by planar natural mica, sheet synthetic mica, tabular alumina, sheet silica, the pearlescent pigment that the flat substrates such as foliated glass scale are prepared into is as ground, with the one layer of doped semiconductor oxide skin(coating) coated in pearlescent pigment surface of bottom material, the doped semiconductor oxide skin(coating) is by being selected from tin as principal component, at least one of oxide of zinc and indium is selected from antimony with doping, the doping oxide of at least one of the oxide of aluminium and tin is formed, wherein, can not be tin simultaneously as the metal of principal component and as the metal of doping, both the matching problem with resin conductive in powdery paints had been ensure that, it in turn ensure that brightness and the color of powder spray, also reduce pearlescent pigment in powdery paints and bind step, improve pearlescent pigment utilization rate, simplify technique.
Description
Technical field
The present invention relates to one kind to be directly used in powder spray pearlescent pigment and preparation method thereof, specifically, is related in pearlescent pigment
Surface coats the doped semiconductor oxide of one layer of Conducting nanostructures again, such as Al-Doped ZnO, antimony doped tin oxide and mix tin oxidation
Indium etc..
Background technology
Powdery paints is a kind of new without solvent, 100% solid powdery coating.Such last coating is a kind of new be free of
Solvent product is free of toxicity, without solvent and without the virose material that volatilizees, therefore without poisoning, the row without fire, without " three wastes "
The problem of public hazards such as putting, complies fully with the requirement of national environmental protection method；Utilization rate of raw materials is high, crosses the powder recoverable of spray,
Highest utilization rate even can be up to more than 99%；After coated article pre-treatment, one-off construction, without primary coat, you can obtain enough
The film of thickness, automation mechanized operation is easily realized, production efficiency is high, can reduce cost；It is meanwhile coating densification, adhesive force, anti-
Impact strength and toughness are good, and corner coverage is high, has excellent resistance to corrosive chemicals energy and electrical insulation properties；Powder
The storage of last coating, transportation safety and conveniently, have the characteristics that energy-conserving and environment-protective, reduce labor intensity it is high with coating machinery intensity, in
The powdery paints market of state is increasing, and use is more and more extensive.
Electrostatic powder coating is required to meet certain specific insulation, the influence otherwise made troubles construction.When powdery paints
Specific insulation is 1010During below Ω cm, powder particle is easy to fall off, 1014During more than Ω cm, powder coating particles electricity
Lotus is not easy to discharge, and workpiece surface easily assembles electric charge, and when specific insulation is 1010-1014When between Ω cm, workability
Can, coating thickness requirement can be met.
Pearlescent pigment, it is a kind of metal oxide film layer that one layer or basic unit's densification are coated in mica surface, by forming the dry of light
Relate to obtain the inorganic pigment of different colours.Mica is very excellent insulating materials in itself, the fine and close oxide on its Surface coating
After film layer, lack hole and the passage of charge movement, therefore pearlescent pigment has an excellent insulating properties, specific insulation is general
1014More than Ω cm.When pearlescent pigment is directly used in electrostatic spraying, exist powder utilization not enough, easily stifled rifle the problems such as, one
As need, by binding technique, itself and resin to be sufficiently mixed, make pearlescent pigment be adhered to each other with resin, is referred to as bound.Tie up
Surely solve the problems, such as pearlescent pigment poorly conductive, still, add the complexity of technique, meanwhile, easily cause powdery paints
Particle increases, and binding is not with great difficulty reunited, and causes powdery paints mobility to be deteriorated.
Tin-antiomony oxide, nanometer antimony-doped stannic oxide, antimony tin oxide (Antimony Tin Oxide, ATO, similarly hereinafter) are called,
ATO powders have broad application prospects in many fields because of its high conductivity and light-coloured transparent, are to develop rapidly in recent years
A kind of new function material.The characteristics of with permanent electric conductivity, high transparency, durability, chemical stabilization；Tin indium oxide
(ITO, or tin-doped indium oxide) is a kind of indium (III) oxide (In2O3) and tin (IV races) oxide (SnO2) mixing
Thing, main characteristic are the conduction of its electricity and optically transparent combination, are a kind of N-type oxide semiconductor nesa coatings；Aluminium
The zinc oxide (AZO) of doping, doping rear film electric conductivity increase substantially, and resistivity can be reduced to 10-4Ohmcm,
And transparent conductive film AZO films stability in hydrogen plasma is better than ITO, while have can be comparable with ITO
Photoelectric characteristic, the optimal replacer of ito thin film is increasingly becoming, AZO films are in flat-panel monitor and thin-film solar cells
Certain applications are obtained.
Patent EP0375575A and US5472640A enter to the preparation method of cladding antimony doped tin oxide and electric conductivity on thin slice respectively
Go and described；JP60-223167 and JP62-050344 is then studied ITO claddings, and DE19811684A is to AZO's
Electric conductivity is described, and CN1350039A and CN991040260A are conductive to fluorine ion and phosphate anion doped stannum oxide
Mica is studied.The processing that these patents are for obtaining Conductive mica and carried out, obtain be light color, it is conductive
Pearlescent pigment of the rate below 100K Ω cm, but brightness extreme difference, conductive filler can only be used as, and cannot function as decorative effect
Pearlescent pigment use.
The content of the invention
It is an object of the invention to provide a kind of pearlescent pigment that can be directly used for electrostatic powder coating and preparation method thereof, its be
The a thin layer of electrical-conductive nanometer film layer of pearlescent pigment Surface coating.
According to the first aspect of the invention, there is provided a kind of pearlescent pigment for being directly used in electrostatic powder coating, it includes pearly-lustre face
Expect ground and one layer of doped semiconductor oxide skin(coating) in pearlescent pigment surface of bottom material cladding, the doped semiconductor oxide skin(coating) is
By at least one of oxide selected from tin, zinc and indium as principal component and as doping component selected from antimony, aluminium and tin
The doping oxide of at least one of oxide is formed, wherein, the metal as principal component and the metal as doping component are not
Can be tin simultaneously.
Based on the weight of ground, the weight percent for the doped semiconductor oxide skin(coating) being made up of above-mentioned doping oxide is
0.2-15.0wt%, preferably 4-10.0wt%, further preferably 0.5-6.0wt%, particularly preferred 1.0-5.0wt%.
In doped semiconductor oxide skin(coating), as principal component selected from tin, zinc and indium oxide (tin oxide, zinc oxide,
Indium oxide) at least one of and oxide (antimony oxide, aluminum oxide and the oxidation selected from antimony, aluminium and tin as doping component
Tin) at least one of weight than 50~1.5:1, preferably 40~2.5:1, more preferably 20~4:1, more preferably 12~5:1, it is more excellent
Select 10~6:1.In the case where principal component contains above-mentioned Multimetal oxide, its respective ratio can be arbitrary, mix
In the case that miscellaneous composition contains above-mentioned Multimetal oxide, each ratio can be arbitrary for its.
Wherein, the oxide selected from tin, zinc and indium as principal component uses salt (the preferably soluble-salt or can water of tin, zinc or indium
Solution salt) deposition forms, and uses the salt of antimony, aluminium or tin (preferably solvable as the oxide selected from antimony, aluminium and tin of doping component
Property salt or hydrolyzable salt) deposition form.
Available pearlescent pigment ground or the pearlescent pigment as ground, can be by planar natural mica, sheet synthetic mica,
The pearlescent pigment that the flat substrates such as tabular alumina, sheet silica, foliated glass scale are prepared into, e.g. selected from sheet
One or more one-level bases in natural mica, synthetic mica, tabular alumina, flaky silicon dioxide, foliated glass scale
Pearly-lustre obtained from coating titanium oxide, iron oxide, silica, aluminum oxide or one kind in tin oxide and/or several combinations on piece
Pigment (two level substrate).It is preferred that D50 particle diameters be not more than 100 μm, the pearlescent pigment not less than 5 μm, particularly preferred D50 grains
Pearlescent pigment of the footpath at 10-90 μm.
It is further preferred that the above-mentioned pearlescent pigment for being directly used in electrostatic powder coating also includes between pearlescent pigment ground and one layer
Layer of silicon dioxide (layer) between doped semiconductor oxide skin(coating).
According to another aspect of the present invention, there is provided a kind of method for the pearlescent pigment for being directly used in electrostatic powder coating, the party
Method comprises the following steps：Using in the salt (preferably soluble-salt or hydrolyzable salt) selected from tin, zinc and indium as principal component precursor
At least one at least one and salt (preferably soluble-salt or hydrolyzable salt) selected from antimony, aluminium and tin as doping component precursor
Kind, it is added in the aqueous suspension containing pearlescent pigment ground or dispersion, by the reactions of these salt or hydrolyzes to form oxidation
Thing and allowing or is coated on the surface of pearlescent pigment ground the oxide-coated, is then isolated from aqueous suspension or dispersion
The pearlescent pigment having been coated with, drying and calcination, it is prepared into the pearlescent pigment with doped semiconductor oxide skin(coating).
In the above-mentioned methods, it is preferable that the reaction or hydrolysis of salt are to make these reacting metal salts or hydrolyze to form oxide and allow
Carried out under the oxide-coated or the pH value being coated on the surface of pearlescent pigment and reaction or hydrolysis temperature.
Available pearlescent pigment ground or the pearlescent pigment as ground, can be by planar natural mica, sheet in the present invention
The pearlescent pigment that the flat substrates such as synthetic mica, tabular alumina, sheet silica, foliated glass scale are prepared into, it is, for example,
In one kind or more in planar natural mica, synthetic mica, tabular alumina, flaky silicon dioxide, foliated glass scale
Titanium oxide, iron oxide, silica, aluminum oxide, one kind in tin oxide and/or several combinations are coated on the one-level substrate of kind,
Obtained from pearlescent pigment (two level substrate).It is preferred that D50 particle diameters are not more than 100 μm, the pearlescent pigment not less than 5 μm is special
Pearlescent pigment of the not preferred D50 particle diameters at 10-90 μm.
In the present invention, pearlescent pigment ground, before it coats doping oxide, layer of silicon dioxide can be coated in advance, it is excellent
The silicate of choosing is hydrated sodium silicate.Used pH value is 5.0-9.5 when being preferably used in coating layer of silicon dioxide, then excellent
Select 6.0-8.5, particularly preferred 7.0-8.0.Preferable coated with silica amount is 0-5.0wt%, preferably 0.2-5.0wt%, further preferably
0.3-3.0wt%, particularly preferred 0.4-2.0wt%, the weight based on pearlescent pigment ground.
In the above-mentioned methods, it is preferable that the dosage of the salt (preferably soluble-salt or hydrolyzable salt) should cause, by metal salt institute
After the ground of the oxide-coated of formation is calcined or is calcined, the percetage by weight of the metal oxide generated is
0.2-15.0wt%, preferably 0.4-10.0wt%, further preferably 0.5-6.0wt%, particularly preferred 1.0-5.0wt%, based on pearlescent pigment bottom
The weight of material.
In the present invention, it is preferred that in order to which the reaction of salt or hydrolysis temperature are 60-85 DEG C used in coating-doping oxide, then it is excellent
Elect 70-85 DEG C, particularly preferred 75-80 DEG C as.
In the present invention, halide of the preferable pink salt selected from tin, one or more, preferably stannic chloride in sulfate and nitrate；
Preferable antimonic salt is selected from antimony trichloride and Antimony pentachloride；One kind in indium halide, indium sulfate and indium nitrate of preferable indium salts or
It is a variety of；Preferable one or more of the zinc salt in zinc halide, zinc sulfate and zinc nitrate；Preferable aluminium salt be selected from aluminum halide,
One or more in aluminum sulfate and aluminum nitrate.
Preferably, the hydrolysis pH value for antimony doped tin oxide ATO is 1.0-3.0, preferably pH 1.5-2.5, particularly preferred pH
1.5-2.0。
Preferably, it is 1 for the antimony in antimony doped tin oxide ATO and the mol ratio of tin:2-20, preferred molar ratio 1:3-10, it is special
Other preferred molar ratio is 1:4-8.
Preferably, the hydrolysis pH value for tin-doped indium oxide ITO is 1.5-4.5, preferably pH 2.0-4.0, particularly preferred pH
2.5-3.5。
Preferably, it is 1 for the tin oxide in tin-doped indium oxide ITO and the mass ratio of indium oxide:5-15, preferred mass ratio are
1:8-12, particularly preferred mass ratio are 1:8-10.
Preferably, the hydrolysis pH value for Al-Doped ZnO AZO is 5.0-9.0, preferably pH 6.0-8.0, particularly preferred pH
6.5-7.5。
Preferably, the mol ratio for the aluminum and zinc in Al-Doped ZnO AZO is 1:15-400, preferred molar ratio 1:20-300,
Particularly preferred mol ratio is 1:30-60.
In the present invention, the temperature range for pearlescent pigment drying is 80-150 DEG C, preferably 80-120 DEG C, particularly preferred 90-110
DEG C, drying temperature such as 10 minutes~1 hour, preferably 20-40 minutes；Temperature range for pearlescent pigment calcining is 500-1000
DEG C, preferably 500-800 DEG C, particularly preferred 600-800 DEG C, calcination time is, for example, 30 minutes~2 hours, more preferably 40 minutes
~90 minutes.
A further object of the present invention is to provide the purposes that above-mentioned pearlescent pigment is used to prepare electrostatic spraying powder coating.
The pearlescent pigment prepared in the present invention, powdex system, preferably addition 1.0-5.0% (weight) are directly used in, especially
It is preferred that 3.0-4.0% (weight), after stirring and evenly mixing, is directly used in electrostatic spraying construction.
The actual benefit of the present invention, both ensure that the matching problem with resin conductive in powdery paints, and in turn ensure that powder spray
Brightness and color, also reduce in powdery paints pearlescent pigment and bind step, improve pearlescent pigment utilization rate, simplify work
Skill, reduce cost.
Embodiment
In order to further appreciate that the present invention, the present invention is further elaborated with reference to embodiments, but not to this hair
Bright limitation, it will be appreciated that these descriptions are intended merely to further illustrate the features and advantages of the present invention, rather than to the present invention
The limitation of claim.The equivalent substitution of all any this areas made according to the disclosure of invention, belong to the guarantor of the present invention
Protect scope.
Embodiment 1
It is (limited purchased from the female color material science and technology share in Fujian to weigh the mica titanium nacreous material KC103 that 200g particle diameters are 10-60 μm
Company), it is placed in 2L beaker, adds 1600mL deionized waters, be put in water-bath, and stirred with 200-300rps speed
Mix, be warming up between 70-80 DEG C, adjust suspension pH value 7.5-8.5,200ml 5% (weight) waterglass is added in 1 hour
Solution, and maintain pH stable with 5% hydrochloric acid, continue to stir half an hour after adding, with 1:1 hydrochloric acid conditioning solution pH value is in 1.5-2.0
Between, configure 20g Tin tetrachloride pentahydrates and 2.5g Antimony pentachlorides are diluted in 40ml concentrated hydrochloric acids, and with deionized water
400ml, the mixed solution of the tin antimony chloride configured is added dropwise in beaker with 2mL/min speed, and with 30%
NaOH solution maintains solution ph constant, and after reacting 3,4 hours, this suspension is filtered, and Muffle furnace is put into after filter cake drying
In, 700 DEG C are warming up to 10 DEG C/min heating rate, is incubated 1 hour, is taken out, is cooled to room temperature, that is, obtains ATO tables
The mica titanium silvery white pearlescent pigment of face processing.
Embodiment 2
Weigh 500g particle diameters and (be purchased from the female color material science and technology share in Fujian for the titanium nacreous KC8725 of 40-160 μm of synthetic mica
Co., Ltd), it is placed in 5L beaker, adds 4000mL deionized waters, be put in water-bath, and with 200-300rps speed
Rate stirs, and is warming up between 70-80 DEG C, and regulation solution ph weighs 2.32g hydration butters of tin and 17.5g between 3.0-4.2
Indium trichloride, 20ml concentrated hydrochloric acids are added, and 500ml is diluted to deionized water, beaker is added dropwise to 1.6mL/min speed
In, and maintain solution ph constant with NaOH solution, after reacting 5,6 hours, filtering, it is put into after filter cake drying in Muffle furnace,
800 DEG C are warming up to 10 DEG C/min heating rate, is incubated 1 hour, takes out, is cooled to room temperature, that is, obtains ITO surfaces bag
The blue iris type synthetic mica covered is titanium nacreous.
Embodiment 3
Weigh the mica iron nacerous pigment KC500MK that 200g particle diameters are 10-60 μm (has purchased from the female color material science and technology share in Fujian
Limit company), it is placed in 2L beaker, adds 1600mL deionized waters, be put in water-bath, and with 200-300rps speed
Stirring, is warming up between 70-80 DEG C, and regulation solution ph weighs 13.28g zinc chloride and the water of 0.5g six between 6.5-7.5
And aluminium chloride, 10ml concentrated hydrochloric acids are added, and 500ml is diluted to deionized water, beaker is added dropwise to 1.5mL/min speed
In, and maintain solution ph constant with NaOH solution, after reacting 5,6 hours, filtering, Muffle furnace is put into after filter cake drying
In, 700 DEG C are warming up to 10 DEG C/min heating rate, is incubated 1 hour, takes out, is cooled to room temperature, that is, obtains surface bag
Cover AZO bronze mica iron nacerous pigment.
Application Example
Pearlescent pigment obtained by above example 1-3 is used for electrostatic powder coating application field.Such as added in powdery paints
The pearlescent pigment of the 1-5% present invention, can prepare the very excellent coating of color and color and luster.
Application Example 1：Pearlescent pigment of the addition 3% containing ATO carries out electrostatic powder coating
Surface coating ATO pearlescent pigment KC103PCL in 1.2 grams of embodiments 1 of precise, add 38.8 grams of powdery paints
Resin system (such as Akzo Nobel AA004QF powdexes), is placed under agitator and is dispersed with stirring 10 minutes.Before spraying
It is first that tinplate surface clean wiped clean is stand-by.It is 25 degrees Celsius that the temperature between spraying is controlled during spraying, and relative humidity is
60%.After spraying 1 time, it is placed in 200 degrees Celsius of baking ovens and toasts 30 minutes.
Contrast Application Example 1：Pearlescent pigment spraying is not added
40 grams of powdery paints (such as Akzo Nobel AA004QF powdexes) accurately are weighed, is placed under agitator and is dispersed with stirring
10 minutes.It is first that tinplate surface clean wiped clean is stand-by before spraying.It is 25 degrees Celsius that the temperature between spraying is controlled during spraying,
Relative humidity is 60%.After spraying 1 time, it is placed in 200 degrees Celsius of baking ovens and toasts 30 minutes.
Contrast Application Example 2：The pearlescent pigment that addition 3% is not handled carries out electrostatic powder coating
The Ke Kuncai materials Science and Technology Co., Ltd. pearlescent pigment KC103 of precise 1.2, add 38.8 grams of powder coating resins
System (such as Akzo Nobel AA004QF powdexes), is placed under agitator and is dispersed with stirring 10 minutes.First will before spraying
Tinplate surface clean wiped clean is stand-by.It is 25 degrees Celsius that the temperature between spraying is controlled during spraying, relative humidity 60%.
After spraying 1 time, it is placed in 200 degrees Celsius of baking ovens and toasts 30 minutes.
Data test, Ai Seli detections and flash-point are carried out to powder spray effect using Bi Ke flash-points detector and Ai Seli detectors
Detect data such as Tables 1 and 2.
Table 1 powder spray, 15 ° of flash-points
| G | SG | Si | Sa | |
| Application Example 1 | 2.68 | 3.34 | 6.17 | 22.72 |
| Contrast Application Example 1 | 0.54 | 0 | 0 | 0 |
| Contrast Application Example 2 | 1.2 | 0.31 | 2.19 | 4.55 |
Note：G：Sand shape effect；SG：Flash grade；Si：Scintillation intensity；Sa：Flash area.
Table 2 powder spray Ai Seli, 15 ° of test datas
| L* | a* | b* | C* | h* | |
| Application Example 1 | 103.23 | -1.26 | -0.82 | 1.51 | 213.22 |
| Contrast Application Example 1 | 91.05 | 1.2 | -0.94 | 1.54 | 140.97 |
| Contrast Application Example 2 | 104.12 | -1.77 | -2.8 | 3.31 | 237.71 |
Note：L represents shading value (black and white), and a represents red green, and b represents champac color, and c represents the degree of color saturation, and h represents hue angle.
As it can be seen from table 1 having carried out the spraying effect of Surface coating ATO pearlescent pigment, flash-point, which substantially exceeds, not to be handled
Pearlescent pigment, illustrate surface treatment have significant effect to pearlescent pigment powder utilization, without add pearlescent pigment spraying effect
Fruit, almost there is no flash-point effect.Powder spray acts on metal surface mostly, and the flickering of metal is very sensitive to the effect of processing.
Table 2 can be seen that before and after the processing, and the brightness of pearlescent pigment and color change are little, but all than not adding pearlescent pigment brightness
Lifting is very big, and the addition of pearlescent pigment can increase the decorative effect of powder spray really.
Application Example 2：Add the pearlescent pigment powder spray of surface A TO processing
Surface coating ATO pearlescent pigment KC500PCL in 1.2 grams of embodiments 3 of precise, add 38.8 grams of powdery paints
Resin system (such as Akzo Nobel AA004QF powdexes), is placed under agitator and is dispersed with stirring 10 minutes.Before spraying
It is first that tinplate surface clean wiped clean is stand-by.It is 25 degrees Celsius that the temperature between spraying is controlled during spraying, and relative humidity is
60%.After spraying 1 time, it is placed in 200 degrees Celsius of baking ovens and toasts 30 minutes.
Claims (13)
1. a kind of pearlescent pigment for being directly used in electrostatic powder coating, it includes pearlescent pigment ground, and in pearlescent pigment ground table
One layer of doped semiconductor oxide skin(coating) that bread covers, the doped semiconductor oxide skin(coating) are by being selected from tin, zinc as principal component
The doping of at least one of the oxide selected from antimony, aluminium and tin with least one of the oxide of indium and as doping component
Oxide is formed, wherein, the metal as principal component and the metal as doping component can not be tin simultaneously.
2. pearlescent pigment according to claim 1, wherein, based on the weight of pearlescent pigment ground, aoxidized by the doping
The weight percent for the doped semiconductor oxide skin(coating) that thing is formed is 0.2-15.0wt%, preferably 0.4-10.0wt%, further preferably
0.5-6.0wt%, 1.0-5.0wt% is particularly preferred.
3. pearlescent pigment according to claim 1 or 2, wherein, in doped semiconductor oxide skin(coating), as principal component
At least one of the oxide selected from tin, zinc and indium and as in the oxide selected from antimony, aluminium and tin of doping component extremely
A kind of few weight ratio is 50~1.5:1, preferably 40~2.5:1, more preferably 20~4:1, more preferably 12~5:1, more preferably 10~6:1.
4. according to the pearlescent pigment any one of claim 1-3, wherein, as principal component selected from tin, zinc and indium
Oxide using tin, zinc or indium salt (preferably soluble-salt or hydrolyzable salt) deposition form, and as doping component be selected from antimony,
The oxide of aluminium and tin is formed using salt (the preferably soluble-salt or hydrolyzable salt) deposition of antimony, aluminium or tin.
5. according to the pearlescent pigment any one of claim 1-4, wherein, the pearlescent pigment ground is by selected from sheet
What the flat substrates in natural mica, sheet synthetic mica, tabular alumina, sheet silica, foliated glass scale were prepared into
Pearlescent pigment, e.g. in planar natural mica, sheet synthetic mica, tabular alumina, sheet silica or foliated glass
Titanium oxide, iron oxide, silica, aluminum oxide or one kind in tin oxide and/or several combinations are coated on scale (one-level substrate)
Obtained from pearlescent pigment (two level substrate)；It is preferred that D50 particle diameters are not more than 100 μm, the pearlescent pigment not less than 5 μm is special
Pearlescent pigment of the not preferred D50 particle diameters at 10-90 μm.
6. a kind of preparation method of pearlescent pigment for being directly used in electrostatic powder coating prepares any one institute in claim 1-5
The method for the pearlescent pigment stated, this method comprise the following steps：Using as the salt selected from tin, zinc and indium of principal component precursor (preferably
Soluble-salt or hydrolyzable salt) at least one of and it is (preferably soluble as salt of the doping component precursor selected from antimony, aluminium and tin
At least one of salt or hydrolyzable salt), it is added in the aqueous suspension containing pearlescent pigment ground or dispersion, passes through these
The reaction of salt hydrolyzes to form oxide and allowed and the oxide-coated or is coated on the surface of pearlescent pigment ground, then from suspension
The pearlescent pigment having been coated with is isolated in the aqueous solution or dispersion, drying and calcination, is prepared into doped semiconductor oxide skin(coating)
Pearlescent pigment.
7. according to the method for claim 6, wherein, the reaction or hydrolysis of salt are to make these reacting metal salts or hydrolysis
Form oxide and allow under the oxide-coated or the pH value being coated on the surface of pearlescent pigment and reaction or hydrolysis temperature and carry out.
8. the method according to claim 6 or 7, wherein, the pearlescent pigment ground be by selected from planar natural mica,
What the flat substrates in sheet synthetic mica, tabular alumina, sheet silica, foliated glass scale were prepared into, e.g. exist
Wrapped on planar natural mica, sheet synthetic mica, tabular alumina, sheet silica or foliated glass scale (one-level substrate)
Pearlescent pigment (two obtained from covering one kind and/or several combinations in titanium oxide, iron oxide, silica, aluminum oxide, tin oxide
Level substrate)；It is preferred that D50 particle diameters are not more than 100 μm, the pearlescent pigment not less than 5 μm, particularly preferred D50 particle diameters are in 10-90
μm pearlescent pigment.
9. according to the method any one of claim 6-8, wherein, pearlescent pigment ground or the pearly-lustre face as ground
Material, before it coats doping oxide, layer of silicon dioxide is coated with silicate in advance, preferable silicate is silicate hydrate
Sodium；The pH value for being preferably used in coating layer of silicon dioxide is 5.0-9.5, further preferably 6.0-8.5, particularly preferred 7.0-8.0；It is excellent
The coated with silica amount of choosing is 0-5.0% (weight), preferably 0.2-5.0% (weight), and further preferably 0.3-3.0% (weight), special
Not preferred 0.4-2.0% (weight), the weight based on pearlescent pigment ground.
10. according to the method any one of claim 6-8, wherein, the dosage of salt (preferably soluble-salt or hydrolyzable salt)
It should cause, after the ground in the oxide-coated formed by metal salt is calcined or is calcined, the weight of the metal oxide generated
Amount percentage is 0.2-15.0% (weight), preferably 0.4-10.0% (weight), further preferably 0.5-6.0% (weight), particularly preferably
1.5-5.0% (weight), the weight based on ground.
11. according to the method any one of claim 6-10, for the reaction of salt used in coating-doping oxide or
Hydrolysis temperature is 60-85 DEG C, is further preferably 70-85 DEG C, particularly preferred 75-80 DEG C.
12. according to the method any one of claim 6-11, wherein, pink salt is selected from halide, sulfate and the nitre of tin
One or more, preferably stannic chloride in hydrochlorate；Antimonic salt is selected from antimony trichloride and Antimony pentachloride；Indium salts are selected from indium halide, indium sulfate
With the one or more in indium nitrate；Preferable one or more of the zinc salt in zinc halide, zinc sulfate and zinc nitrate；It is preferred that
One or more of the aluminium salt in aluminum halide, aluminum sulfate and aluminum nitrate；
Preferably, the hydrolysis pH value for antimony doped tin oxide ATO is 1.0-3.0, preferably pH 1.5-2.5, particularly preferred pH
1.5-2.0；And/or for the antimony in antimony doped tin oxide ATO and the mol ratio of tin it is 1:2-20, preferred molar ratio 1:3-10,
Particularly preferred mol ratio is 1:4-8；
Preferably, the hydrolysis pH value for tin-doped indium oxide ITO is 1.5-4.5, preferably pH 2.0-4.0, particularly preferred pH
2.5-3.5；And/or for the tin oxide in tin-doped indium oxide ITO and the mass ratio of indium oxide it is 1:5-15, preferred mass ratio are
1:8-12, particularly preferred mass ratio are 1:8-10；
Preferably, the hydrolysis pH value for Al-Doped ZnO AZO is 5.0-9.0, preferably pH 6.0-8.0, particularly preferred pH
6.5-7.5；And/or for the aluminum and zinc in Al-Doped ZnO AZO mol ratio be 1:15-400, preferred molar ratio 1:30-300,
Particularly preferred mol ratio is 1:30-60.
13. the method according to pearlescent pigment any one of claim 1-5 or any one of by claim 6-12
The pearlescent pigment of preparation is used for the purposes for preparing electrostatic spraying powder coating.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108864700A (en) * | 2018-08-01 | 2018-11-23 | 国网安徽省电力有限公司六安供电公司 | A kind of conductive polymer composite and preparation method thereof |
| CN115895293A (en) * | 2022-11-16 | 2023-04-04 | 福建坤彩材料科技股份有限公司 | Pearlescent pigment suitable for powder coating and preparation method and application thereof |
| CN116445011A (en) * | 2023-04-10 | 2023-07-18 | 瑞彩科技股份有限公司 | Bonding-free pearlescent pigment for electrostatic powder coating and preparation method thereof |
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| CN1078241A (en) * | 1992-05-04 | 1993-11-10 | 广东省测试分析研究所 | The golden colour lustre pigments that rare earth is painted |
| CN1314871A (en) * | 1998-09-06 | 2001-09-26 | 新材料公共服务公司研究所 | Method for preparing suspensions and powders based on indium tin oxide and the use thereof |
| CN101348617A (en) * | 2008-09-22 | 2009-01-21 | 苏州泰珠科技发展有限公司 | Doping pearlescent pigment and preparation thereof |
| CN103228742A (en) * | 2010-12-01 | 2013-07-31 | 默克专利股份有限公司 | Pigments |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078241A (en) * | 1992-05-04 | 1993-11-10 | 广东省测试分析研究所 | The golden colour lustre pigments that rare earth is painted |
| CN1314871A (en) * | 1998-09-06 | 2001-09-26 | 新材料公共服务公司研究所 | Method for preparing suspensions and powders based on indium tin oxide and the use thereof |
| CN101348617A (en) * | 2008-09-22 | 2009-01-21 | 苏州泰珠科技发展有限公司 | Doping pearlescent pigment and preparation thereof |
| CN103228742A (en) * | 2010-12-01 | 2013-07-31 | 默克专利股份有限公司 | Pigments |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108864700A (en) * | 2018-08-01 | 2018-11-23 | 国网安徽省电力有限公司六安供电公司 | A kind of conductive polymer composite and preparation method thereof |
| CN115895293A (en) * | 2022-11-16 | 2023-04-04 | 福建坤彩材料科技股份有限公司 | Pearlescent pigment suitable for powder coating and preparation method and application thereof |
| CN116445011A (en) * | 2023-04-10 | 2023-07-18 | 瑞彩科技股份有限公司 | Bonding-free pearlescent pigment for electrostatic powder coating and preparation method thereof |
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