CN106147543A - Coiled material powdery paints and preparation method thereof - Google Patents
Coiled material powdery paints and preparation method thereof Download PDFInfo
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- CN106147543A CN106147543A CN201510175014.1A CN201510175014A CN106147543A CN 106147543 A CN106147543 A CN 106147543A CN 201510175014 A CN201510175014 A CN 201510175014A CN 106147543 A CN106147543 A CN 106147543A
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Abstract
Coiled material powdery paints of the present invention and preparation method thereof, relates to product and the manufacture method of a kind of coiled material ultrafine powder paint, and in order to solve in prior art, owing to powder body is too thick, that cause coating surface out-of-flatness and coating are the thickest, and cost is high, the problems such as quality is low.Powder particle of the present invention is ball-type shape, and particle diameter is 10-25 micron, selected from various resins and various pigment and auxiliary agent, is wherein added with a certain amount of powder fluidization accelerator in powder, such as the fumed silica of 0.3-1.0 weight %；Manufacture method of the present invention includes by powdery paints material dissolution in organic solvent, obtains the liquid mixture that pigment dispersion is highly uniform, then prepared the spherical powder of ultra-fine grain diameter by pressurized aerosol spray drying after high speed dispersion or sand mill are ground.Powder body, due to shape spherical in shape, is not necessary to add or add a small amount of fluidisation accelerator and just can flow very well.Owing to pigment is through grinding, coating has extraordinary covering power.Present invention is mainly used for the manufacture of the powdery paints of building, household electrical appliances, furniture, automobile etc..
Description
Technical field
The present invention relates to a kind of coiled material powdery paints, and the preparation method of this coiled material powdery paints.
Technical background
Powdery paints have economy, efficiently, environmental protection and province can (often claim 4E:Economical,
Efficient, Environmental, Energy Saving) etc. advantage and developed rapidly,
A lot of fields replace liquid coating to use the most completely.
Powdery paints is added pigment by resin and a small amount of additive is raw material, generally goes through mixing and rises
After temperature melt extrudes, the broken essence of cooling becomes strip, then machinery disintegrating machine is ground into the powder of needs.?
During use, then the powder body of powdery paints must be used with gas fluidized in fluid unit
Charged spray gun spraying is on metal parts, and metal parts is normally grounded or oppositely charged, so,
The powder body of spray gun ejection is by Electrostatic Absorption to parts, by heating, powder body melting is solid the most again
Change and form one layer of continuous print paint film.Unadsorbed powder body on parts can be recycled.By
In not as liquid coating containing organic solvent, powdery paints thus expend less energy not
There is pollution.
But the application of powdery paints there is also now some and limits, and topmost two big shortcomings are, no
The coating surface that liquid coating is the most smooth can be obtained, it is impossible to obtain the painting that liquid coating is the most relatively thin
Layer thickness, which has limited powdery paints use on a lot of expensive goods and also limit painting cost
Further reduction.Surface irregularity and coating the thickest be all owing to the particle diameter of powdery paints is made the most greatly
Become.The particle diameter of conventional powder coatings is usually 30-50 micron, and the thickness of sprayed coating is 60-80
Micron, owing to particle diameter is big, if thickness is below 50 microns, coating will uneven thickness, Pericarpium Citri Reticulatae
Seriously, the phenomenon that part is show-through occurs.And if by the grain of conventional powder coatings 30-50 micron
Footpath reduces, and i.e. produces particle diameter ultrafine powder paint below 25 microns, it becomes possible to overcome surface not
The shortcoming that smooth and coating is the thickest.Although powdery paints instead of liquid coating in a lot of fields,
Such as metal portions such as the application of almost all of white domestic appliances, the application of building materials aluminium section bar, metal furnitures
The application of part has the most all used powder coating and their application not in use by liquid coating.At that time,
In coil painting industry, it is coated with thinness and the flatness in city owing to powder coating is unable to reach coiled material, existing
Using liquid coating the most in a large number.Coiled material powdery paints is a popular research class attracted attention very much
Topic, has attracted the great interest of various countries scientific and technical personnel.
The key of coiled material powdery paints is exactly ultrafine powder paint.Superfine powder itself is little due to quality
Surface area is big, it is easy to occur powder body to unite, the phenomenon of flow difficulties, thus cannot be carried out routine
Electrostatic spraying.Fine-powdered to be realized, mainly solves the fluidization problems of micropowder in fact exactly.Greatly
The work of amount launches around fluidization problems, also achieves sizable progress.Nishida etc. invent
Adding the method (USP5,498,479, USP5,567,521) of lubricant, the method makes less than 1 micron
Aluminium oxide, the additive such as titanium dioxide, adsorb at powder surface through mixed at high speed so that
Powder body has preferable mobility.The method has obtained particle diameter having preferably at 7-15 micron
The product of mobile performance, but additive addition is too many, in many-sides such as gloss, levelling and performances
Bring negative interaction, it is more difficult to realize industrialization.Lucarelli et al. has invented interpolation fluidisation promoting agent
The method (USP6228927) of (fluidization enhancer), the method adds the fluidisation of 0.1-2%
The fluidizing performance of powdery paints can be improved after promoting agent but preferable surface effect cannot be obtained, make
People effort to real industrialization again step go a step further.Existing interpolation surface lubricant and stream
Change the various methods of accelerator, although solving fluidization problems in various degree, but due to additive
Relatively large use, usually bring the various defects such as powdery paints flow leveling is bad, delustring is serious,
Limit its application to some extent.Meanwhile, existing ultrafine powder paint manufacture method produces work
Skill is more complicated, performance difficulty, relatively costly, there is the problem such as side reaction and environmental protection.
It is little that what micropowder fluidisation was bad is primarily due to powder quality, and surface area is big, between particle
Molecular separating force relatively increase, thus the phenomenon of the not energy fluidizing of occurring uniting.The present invention is existing in research
Finding when having powdery paints powder body, overwhelming majority powder body presents irregular bulk and lamellar, and gets over
Being irregular lamellar, powder body is the most easily united；Through experimental studies have found that, powder body connects
Nearly ball shape structure, is less susceptible to unite.This is owing to the surface area of spheroid powder body is minimum, between powder body
Surface contact minimum.
Summary of the invention
It is an object of the invention to provide a kind of practical coiled material ultrafine powder paint and manufacturer thereof
Method, in order to solve prior art products coating out-of-flatness and thickness is the highest, manufacture method production technology
More complicated, performance difficulty, the problem such as relatively costly.
The object of the present invention is achieved like this:
Use organic solvent to be dissolved by coating resin, be subsequently adding pigment and filler, through dividing at a high speed
Dissipating or regulate viscosity after sand mill dispersion and carry out pressure atomization and be dried, the powder body tool obtained is well-regulated
Ball shape, sieves in the case of being added without or adding minimal amount of fluidisation accelerator, is had
The ultrafine powder paint of mobile performance very well.
Product of the present invention be mean diameter be the powdery paints of the superfine powder of 10-25 micron, particle diameter
Carefully more a lot of than the particle diameter 30-50 micron of conventional powder coatings, and its powder particle is ball-type
Shape, thus there is preferable powder fluidization performance.
Powder body have passed through the efficient dispersive processes such as liquid sand milling in organic solvent before pelletizing so that
Pigment and filler can be better dispersed in resin, thus the coating obtained has very prominent
Covering power.
The manufacture method of powder particle wherein powder is selected from polyester resin, polyurethane resin, asphalt mixtures modified by epoxy resin
Fat, the mixing of polyester epoxy, acrylic acid etc..
Wherein powder may be containing the fumed silica of 0.1-1.0 weight %.
Cooling solidify to form granule and first collects the powder body reproduced through cyclonic separation, then through vibration of ultrasonic wave
Sieve screening obtains powder coating product.
Manufacture method of the present invention comprises the steps:
The most first the resin of coating is dissolved in organic solvent, adds pigment and filler, stir
Mix uniformly；
2. after high speed dispersion or sand mill are ground, obtain pigment and the finely dispersed liquid of filler
Intermediate；
3. finely dispersed liquid is carried out pressurized aerosol spray-drying process, obtain required
The spherical powder of 10-25 micron；
Adding the most as required and fluidize accelerator on a small quantity, after high-speed stirred, screening obtains superfines
Coating.
The organic solvent wherein used be conventional organic solvent such as butanone, toluene, dimethylbenzene and
Part alcohol ether solvent, can have difference according to the difference of coatings chemistry performance.
Other pressure of pressurized aerosol spray-drying process are 0.1-3 atmospheric pressure, and steam problem is
70-180 degree Celsius.
Adding fumed silica and can improve the mobility of powdery paints, a small amount of interpolation can be certain
Degree improves the mobility of the powder body of more than 25 microns, and thinner powder body be must be added to bigger number
Amount, although improve mobility, but Pericarpium Citri Reticulatae, delustring and the surface of causing coating surface serious are vaporific.
Superfine powder through pressure atomization granulation preparation processes through adding a small amount of fumed silica
After, mobility is fine, and coating surface is the most smooth, and coating layer thickness reduces.
The droplet measurement of powder body grain: use laser granulometry to measure.
Detailed description of the invention
In conjunction with the embodiments, the invention will be further described, but the present invention is not limited to these in fact
Execute example.Any variation that those skilled in the art are made under the enlightenment of disclosure of the present invention is the most all
Fall in the range of the claims in the present invention are protected.
Embodiment 1
In a mixing bowl of 30 liters add 15kg mixed organic solvents (butanone: toluene: ethanol=
70: 25: 5) the following material of lower addition, then it is stirred for:
High speed dispersion more than 30 minutes, detects fineness, when fineness reaches less than 50 microns, stops
Dispersion.Aforesaid liquid carries out aerosol nebulization pelletize, and heating temperature of inlet air is 110 degree, goes out
Temperature is 50 degree, and spray pressure is 0.5, adjust nozzle atomizing effect so as to get powder body
Balling-up shape, mean diameter is 18 microns.Product has good flow leveling, uses electrostatic spraying
Ground mode is sprayed on the aluminium sheet of chromaking pretreatment, the little baking of the temperature of 200 degree 10 minutes.
The clad plate coating layer thickness obtained is 40 microns, has very even curface effect.
Embodiment 2
All are such as example 1, but the atomizing effect of adjustable spraying air pressure and nozzle so as to get powder body grain
Footpath is 35 microns.The coating film thickness obtained is 80 microns, coating surface and conventional powder coatings one
Sample, has bigger Fructus Citri tangerinae stricture of vagina.
Embodiment 3
Such as example 1, but adjustable spraying air pressure is 0.6, and regulate nozzle atomizing effect so as to get
Diameter of particle is 10 microns.Add the fumed silica mix homogeneously of 1%, the coating obtained
Thickness is 25 microns, and coating surface is the most smooth.
Embodiment 4
Such as example 1, but adjustable spraying air pressure is 0.5, and regulate nozzle atomizing effect so as to get
Diameter of particle is 18 microns.Add the vapor phase method aluminium oxide mix homogeneously of 0.1%, the coating obtained
Thickness is 30 microns, and coating surface is the most smooth.
Embodiment 5
Such as example 1, but adjustable spraying air pressure is 0.4, and regulate nozzle atomizing effect so as to get
Diameter of particle is 25 microns.Being added without any fluidisation accelerator, the coating film thickness obtained is 35 micro-
Rice, the model of coating surface ratio 2 is the most smooth.
Embodiment 6
In a mixing bowl of 30 liters add 14kg mixed organic solvents (butanone: toluene: ethanol=
70: 25: 5) the following material of lower addition, then it is stirred for:
Processing mode such as example 1.But crossing sand mill after high-speed stirred, it is micro-that grinding makes fineness reach 50
When rice is following, stop dispersion.The diameter of particle obtained is 17 microns, and coating product thickness is 35
Micron, has extraordinary flatness.
Embodiment 7
In a mixing bowl of 30 liters add 16kg mixed organic solvents (butanone: toluene: ethanol=
70: 25: 5) the following material of lower addition, then it is stirred for:
Processing mode such as example 3.The diameter of particle obtained is 19 microns, and coating product thickness is 33
Micron, has extraordinary flatness.
Embodiment 8
15kg mixed organic solvents (butanone: toluene=80: 20) is added in a mixing bowl of 30 liters,
Then the following material of lower addition it is stirred for:
Processing mode is with example 1, but the model after electrostatic spraying toasts 10 minutes at 240 degree.Obtain
Diameter of particle be 19 microns, coating product thickness is 40 microns, has extraordinary flatness.
Embodiment 9
Formula and preparation method such as example 8, but adjustable spraying air pressure is 0.6, and regulate the atomization of nozzle
Effect so as to get diameter of particle be 10 microns.Add the vapor phase method aluminium oxide mix homogeneously of 1%,
The coating film thickness obtained is 20 microns, and coating surface is smooth.
Embodiment 10
Formula and preparation method such as example 8, but adjustable spraying air pressure is 0.5, and regulate the atomization of nozzle
Effect so as to get diameter of particle be 18 microns.Add the fumed silica mixing of 0.1%
Uniformly, the coating film thickness obtained is 30 microns, and coating surface is the most smooth.
Fluorocarbon resin and the ratio of acrylic resin and the kind preparation method shadow to the product of the present invention
Only need to suitably regulate working condition can obtain having good flow to ring little, different raw material composition
The solid spherical powder of performance.Generally, PVDF/ acrylic acid ratio can be 50/50-10/90,
It is desirable that be 70/30.Acrylic acid can be thermoplastic can also be heat cured.Fluorocarbon coating is used
Pigment must be inorganic or ceramic paint.
Compared with prior art, the present invention has a following advantage:
The powder body that particle diameter is less can be prepared by the method for liquid spray drying and granulating, normally used
The method that machinery smashes can only obtain the powder body that particle diameter is thicker, superfine powder to be obtained, and needs more
Complicated equipment.It addition, the powder body that the present invention obtains has well-regulated ball shape, it is greatly reduced
Surface area and the factor such as surface energy make the powder body of present aspect have less powder body to unite ability,
Thus obtain good fluidizing performance.So, it is added without or to add a small amount of fluidisation accelerator the most permissible
Obtain the ultrafine powder paint product that can normally use.And the high efficiency of liquid grinding distribution, make
Obtain coating and there is the most superior covering power.Solve in ultrafine powder paint exploitation the most simultaneously
Two hang-ups: fluidize bad and covering power bad.
It practice, the ultrafine powder paint of the particle diameter of 10-25 micron, it it is the particle diameter model needed most now
Enclose.Powdery paints less than 10 microns has the shortcomings such as powder utilization is low, and actual production there is no need.
Although the present invention is only limited to the micropowder of more than 10 microns in the scope improving mobility, but substantially
On disclosure satisfy that the requirement of most application.The present invention can be greatly improved coating surface flatness,
The thickness of existing ordinary powder coating can also be reduced about half simultaneously.The method is applicable to own
Coating variety, compared with other existing micropowder manufacture methods, there is enforcement easily, do not have
The series of advantages such as side effect, have the biggest market application foreground.Powdery paints itself is a kind of
The product of environment-friendly type, it is smooth that ultrafine powder paint can obtain the unavailable height of ordinary powder coating
Surface effect, thus more irreplaceable high-grade products of ordinary powder coating before can substitute for
The liquid coating of application, thus there is environment protection significance clearly.
Claims (9)
1. a coiled material powdery paints, it is characterised in that: wherein powder particle is ball-type shape, grain
Footpath is 10-35 micron.
2. a coiled material powdery paints, it is characterised in that: wherein powder particle is ball-type shape, grain
Footpath is 15-25 micron.
3. the manufacture method of coiled material powdery paints as described in one of claim 1-2, its feature exists
In comprise the steps: the raw material of coiled material powdery paints after organic solvent dissolves in a liquid state
The dispersing mode using the conventional liq coating material production such as high speed dispersion or sand mill grinding carries out pigment
With the dispersion of filler, the powdery paints that the liquid substance of the high dispersive obtained produces has the highest screening
Gai Li, can carry out the application of shallow layer.
4. the manufacture method of coiled material powdery paints as described in one of claim 1-2, its feature exists
In comprising the steps: that powder stock uses after organic solvent dissolves and be fully dispersed in the liquid state
The method being spray-dried is pelletized, and obtains the rule of the ball shape that mean diameter is 10-25 micrometer range
The powder body with preferable mobile performance then.
5. the manufacture method of coiled material powdery paints as claimed in claim 4, it is characterised in that: its
The solids content of the liquid of middle spray drying granulation is 20%-70%.The mistake of spray drying granulation
The intake air temperature of journey is 70-170 degree Celsius.The pressure of atomising air is 0.1-1.0 atmospheric pressure.
6. coiled material powdery paints as described in one of claim 1-5, it is characterised in that: wherein powder
The end stream accelerator containing 0.1-1.0 weight %, fumed silica.
7. coiled material powdery paints as described in one of claim 1-5, it is characterised in that: wherein powder
The end stream accelerator containing 0.1-1.0 weight %, vapor phase method aluminium oxide.
8. coiled material powdery paints as described in one of claim 1-5, it is characterised in that: wherein powder
The end stream accelerator containing 0.1-1.0 weight %, stearate.
9. coiled material powdery paints as described in one of claim 1-7, it is characterised in that: wherein powder
End is selected from polyester resin, polyurethane resin, epoxy resin, the mixing of polyester epoxy, acrylic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510175014.1A CN106147543A (en) | 2015-04-14 | 2015-04-14 | Coiled material powdery paints and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510175014.1A CN106147543A (en) | 2015-04-14 | 2015-04-14 | Coiled material powdery paints and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106147543A true CN106147543A (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510175014.1A Pending CN106147543A (en) | 2015-04-14 | 2015-04-14 | Coiled material powdery paints and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107744931A (en) * | 2017-09-28 | 2018-03-02 | 浙江瀚镪自动化设备股份有限公司 | A kind of surface treatment method of ultra-thin metal corrosion-resistant finishes |
| CN107793813A (en) * | 2017-09-28 | 2018-03-13 | 浙江瀚镪自动化设备股份有限公司 | A kind of preparation method of microthin coating powdery paints for automation equipment |
-
2015
- 2015-04-14 CN CN201510175014.1A patent/CN106147543A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107744931A (en) * | 2017-09-28 | 2018-03-02 | 浙江瀚镪自动化设备股份有限公司 | A kind of surface treatment method of ultra-thin metal corrosion-resistant finishes |
| CN107793813A (en) * | 2017-09-28 | 2018-03-13 | 浙江瀚镪自动化设备股份有限公司 | A kind of preparation method of microthin coating powdery paints for automation equipment |
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Application publication date: 20161123 |
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