CN110093089A - A kind of warping resistance type fire-proof powdery paint and preparation method thereof - Google Patents
A kind of warping resistance type fire-proof powdery paint and preparation method thereof Download PDFInfo
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- CN110093089A CN110093089A CN201910423277.8A CN201910423277A CN110093089A CN 110093089 A CN110093089 A CN 110093089A CN 201910423277 A CN201910423277 A CN 201910423277A CN 110093089 A CN110093089 A CN 110093089A
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
-
- 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
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The present invention provides a kind of warping resistance type fire-proof powdery paints and preparation method thereof, are related to coating material production processing technique field.It specifically is mixed with to obtain by base-material, auxiliary material and auxiliary agent, base-material includes the raw material of following parts by weight: 700~750 parts of brominated epoxy resin, 56~60 parts of crosslinking agent, 10~15 parts of levelling agent, 3~8 parts of styrax, 6~10 parts of optical brightener, 100~150 parts of blanc fixe；Auxiliary material includes 150~180 parts of calcium carbonate, 200~250 parts of colorant；Auxiliary agent includes 5~10 parts of coupling agent, 5~10 parts of polyvinyl butyral resin, 35~50 parts of fire retardant.It mutually cooperates between powdery paints each component of the invention, and is squeezed out by premix, the powder that the techniques such as pulverize and sieve are made can effectively improve coated article part heat resistance and warping resistance performance.
Description
Technical field
The present invention relates to coating material production processing technique field, especially a kind of warping resistance type fire-proof powdery paint and its preparation
Method.
Background technique
Powdery paints is the solid powdery synthetic resin coating formed with hard resin and pigment, filler and auxiliary agent etc..
It is different with usual vehicle type coating and water paint, its decentralized medium not instead of solvent and water, air.It has solvent-free
The characteristics of pollution, 100% film forming, low energy consumption.Powdery paints is a kind of solvent-free volatilization, and a coating is molding environment friendly coated
Material, application is very extensive, but due to the general poor fire of high molecular polymer, and small polymer its flexibility of molecular weight also phase
To weaker, this is restricted the use of powdery paints on some fields.The building materials of utilization in communal facility
On, many workpiece not only have fire protection requirement, it is also necessary to which the technique of first coating post-processing is come assembled.But under this processing conditions,
The unbearable instantaneous punching press of surface covering or 180 degree bending after Workpiece coating and there is cracking and fall off equal adverse reactions, this makes
Workpiece is exposed is easy to be corroded and influence beauty into air.
Summary of the invention
The object of the present invention is to provide a kind of warping resistance type fire-proof powdery paints and preparation method thereof, and it is anti-to take into account workpiece coating
The different performance of fire and bend-resistance combines, and makes building materials be easier to process after coating, is then assembled in large-scale public arena again.Solution
Certainly existing powdery paints has fire protection requirement, and unbearable instantaneous punching press or 180 degree when the coating post-processing of needs elder generation in workpiece
Bending and occur cracking fall off equal adverse reactions the technical issues of.
In order to achieve the above object, the invention provides the following technical scheme:
A kind of warping resistance type fire-proof powdery paint, is mixed with to obtain by base-material, auxiliary material and auxiliary agent, under the base-material includes
The raw material of column parts by weight: 700~750 parts of brominated epoxy resin, 56~60 parts of crosslinking agent, 10~15 parts of levelling agent, styrax 3~
8 parts, 6~10 parts of optical brightener, 100~150 parts of blanc fixe；The auxiliary material includes 150~180 parts of calcium carbonate, colorant 200
~250 parts；The auxiliary agent includes 5~10 parts of coupling agent, 5~10 parts of polyvinyl butyral resin, 35~50 parts of fire retardant.
Further, the brominated epoxy resin is tetrabormated bisphenol A epoxide resin, and bromine content is 51~52%, softening
O'clock at 125~130 degree.
It is added in the present invention using brominated epoxy resin as main film forming substance, due to tetrabormated bisphenol A epoxide resin
It is better than other resins in flame retardant property, therefore preferably uses tetrabormated bisphenol A epoxide resin, is specifically preferentially selected into softening point 125
~130 degree, the tetrabormated bisphenol A epoxide resin of bromine content 51~52%.
Further, in the base-material, crosslinking agent is two hydrazides of sebacic acid, and levelling agent is Vinalac 5920,
Styrax is benzoin, and optical brightener is polymethyl methacrylate.
Since the mechanical performance of two hydrazides of sebacic acid and yellowing resistance in the curing agent of bisphenol A epoxide resin can be more excellent, because
Crosslinking agent in this present invention preferentially selects two hydrazides of sebacic acid.
Further, in the auxiliary agent, coupling agent is preferably chelating titanate coupling agent.
Coupling agent of the invention is added as powder coating additive, improves the chela between resin organic matter and filler inorganic matter
Conjunction property can prevent coating and cracking when workpiece bending punching press after powder coating solidification.
Further, the fire retardant selects the mixture of antimony oxide and halogen compounds；Wherein, three oxygen
The mass ratio for changing two antimony and halogen is 1:2-2.5.
Further, the halogen is deca-BDE.
Antimony oxide in above-mentioned fire retardant is used alone no flame retardant effect, but with halogen compounds and used time, can
Halogen compounds is set to decompose the oxygen that non-flammable compressive gas waters down burning, and antimony oxide can absorb the heat in coating.
The calcium carbonate is added as powdery paints filler, improves the stiffness and strength of powdery paints, is used in powder and applies
Barium sulfate, kaolin, quartz etc. also may be selected in filler in material, and since workpiece is indoor application, performance requirement is not high, and carbon
More much lower than other fillers in sour calcium cost, calcium carbonate is optimal from cost.
Preferably, the powdery paints is mixed with to obtain by base-material, auxiliary material and auxiliary agent, and the base-material includes following weight
The raw material of part: 700 parts of tetrabormated bisphenol A epoxide resin, 56 parts of two hydrazides of sebacic acid, 10 parts of Vinalac 5920, benzene
3 parts of acyloin, 6 parts of polymethyl methacrylate, 100 parts of blanc fixe；The auxiliary material includes 150 parts of calcium carbonate, colorant 200
Part；The auxiliary agent includes 6 parts of chelating titanate coupling agent, 6 parts of polyvinyl butyral resin, antimony oxide and ten bromines two
35 parts of the mixture of phenylate, wherein the mass ratio of antimony oxide and deca-BDE is 1:2.
A kind of warping resistance type fire-proof powdery paint preparation method of the invention, comprising the following steps:
Step 1: it successively by base-material and auxiliary agent investment mixing tank, mixes 5~6 minutes, obtains partial blend；
Step 2: auxiliary material being added into partial blend, in mixing 5~6 minutes, obtains whole mixtures；
Step 3: by whole mixtures by double screw extruder melting extrusion, area's extrusion temperature is 90 DEG C, and 2nd area are squeezed
105 DEG C of temperature out, 120 revs/min of feeding revolving speed, 350 revs/min of acquisition fused materials of screw speed；
Step 4: will in step 3 obtain fused materials pass through tabletting machine, then communicated band be transmitted to crusher into
Row is broken；
Step 5: the sheet stock in step 4 is granulated into tiny sheet stock by broken crusher machine, then tiny sheet stock is passed through
Air classification mill is ground into fine powder, finally by fine powder after vibrating screen sieves up to the powdery paints；Wherein, vibrating screen frequency
It is 1500 beats/min, mesh size is 88 μm.
A kind of warping resistance type fire-proof powdery paint of the invention and preparation method thereof is analyzed and is worked by creativeness, obtained
To optimal component and proportion, make to act synergistically between each component, and squeezed out by premix, is pulverized and sieved, the works such as electrostatic spraying
The powder that skill is made can effectively improve coated article part heat resistance and reach V-0 grades, and 180 ° of warping resistance are not cracked.Wherein, poly- second
Enol butyral resin not only improves the tensile strength and elongation of film, goes back while improving the impact resistance of coating
Energy.Blanc fixe in base-material increases the hardness of film, and styrax can reduce film coated surface tension, eliminates pin hole.Resistance
Fire the antimony oxide in agent and be used alone no flame retardant effect, but with halogen compounds and used time, halogen compounds point can be made
Solution non-flammable compressive gas waters down the oxygen of burning, and antimony oxide can absorb the heat in coating.The two functional aid is all logical
Effect is played maximum by the synergistic effect crossed between compound, both reduces dosage, is also assigned coating heat resistance and is reached V-0 grades, applies
Layer 180 ° of indehiscent excellent physical properties of bending, recommend in dosage, the appearance of coating is unaffected.
Specific embodiment
Technical solution of the present invention is clearly and completely described below, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Embodiment 1
The warping resistance type fire-proof powdery paint of the present embodiment, is mixed with to obtain, the base-material by base-material, auxiliary material and auxiliary agent
Raw material including following parts by weight: 700 parts of tetrabormated bisphenol A epoxide resin, 56 parts of two hydrazides of sebacic acid, polymethylacrylic acid is just
10 parts of butyl ester, 3 parts of benzoin, 6 parts of polymethyl methacrylate, 100 parts of blanc fixe；The auxiliary material includes calcium carbonate 150
Part, 200 parts of colorant；The auxiliary agent includes 6 parts of chelating titanate coupling agent, 6 parts of polyvinyl butyral resin, three oxidations
Two antimony and 35 parts of the mixture of halogen compounds, wherein the mass ratio of antimony oxide and deca-BDE is 1:2.
Wherein, the bromine content of the tetrabormated bisphenol A epoxide resin is 51~52%, and softening point is at 125~130 degree.
The following method preparation that the powdery paints of the present embodiment uses:
Step 1: it successively by base-material and auxiliary agent investment mixing tank, mixes 5~6 minutes, obtains partial blend；
Step 2: auxiliary material being added into partial blend, in mixing 5~6 minutes, obtains whole mixtures；
Step 3: by whole mixtures by double screw extruder melting extrusion, area's extrusion temperature is 90 DEG C, and 2nd area are squeezed
105 DEG C of temperature out, 350 revs/min of screw speed, obtain fused materials by 120 revs/min of feeding revolving speed；
Step 4: will in step 3 obtain fused materials pass through tabletting machine, then communicated band be transmitted to crusher into
Row is broken；
Step 5: the sheet stock in step 4 is granulated into tiny sheet stock by broken crusher machine, then tiny sheet stock is passed through
Air classification mill is ground into fine powder, finally by fine powder after vibrating screen sieves up to the powdery paints；Wherein, vibrating screen frequency
It is 1500 beats/min, mesh size is 88 μm.
Embodiment 2
The warping resistance type fire-proof powdery paint of the present embodiment, is mixed with to obtain, the base-material by base-material, auxiliary material and auxiliary agent
Raw material including following parts by weight: 720 parts of tetrabormated bisphenol A epoxide resin, 58 parts of two hydrazides of sebacic acid, polymethylacrylic acid is just
12 parts of butyl ester, 5 parts of benzoin, 8 parts of polymethyl methacrylate, 120 parts of blanc fixe；The auxiliary material includes calcium carbonate 160
Part, 220 parts of colorant；The auxiliary agent includes 8 parts of chelating titanate coupling agent, 8 parts of polyvinyl butyral resin, three oxidations
Two antimony and 40 parts of the mixture of halogen compounds, wherein the mass ratio of antimony oxide and deca-BDE is 1:2.2.
Wherein, the bromine content of the tetrabormated bisphenol A epoxide resin is 51~52%, and softening point is at 125~130 degree.
The powdery paints of embodiment 2 uses the identical preparation method recorded with embodiment 1 to prepare.
Embodiment 3
The warping resistance type fire-proof powdery paint of the present embodiment, is mixed with to obtain, the base-material by base-material, auxiliary material and auxiliary agent
Raw material including following parts by weight: 740 parts of tetrabormated bisphenol A epoxide resin, 59 parts of two hydrazides of sebacic acid, polymethylacrylic acid is just
14 parts of butyl ester, 6 parts of benzoin, 9 parts of polymethyl methacrylate, 130 parts of blanc fixe；The auxiliary material includes calcium carbonate 170
Part, 220 parts of colorant；The auxiliary agent includes 9 parts of chelating titanate coupling agent, 9 parts of polyvinyl butyral resin, three oxidations
Two antimony and 45 parts of the mixture of halogen compounds, wherein the mass ratio of antimony oxide and deca-BDE is 1:2.5.
Wherein, the bromine content of the tetrabormated bisphenol A epoxide resin is 51~52%, and softening point is at 125~130 degree.
The powdery paints of embodiment 3 uses the identical preparation method recorded with embodiment 1 to prepare.
Embodiment 4
The warping resistance type fire-proof powdery paint of the present embodiment, is mixed with to obtain, the base-material by base-material, auxiliary material and auxiliary agent
Raw material including following parts by weight: 750 parts of tetrabormated bisphenol A epoxide resin, 60 parts of two hydrazides of sebacic acid, polymethylacrylic acid is just
15 parts of butyl ester, 8 parts of benzoin, 10 parts of polymethyl methacrylate, 150 parts of blanc fixe；The auxiliary material includes calcium carbonate 180
Part, 240 parts of colorant；The auxiliary agent includes 10 parts of chelating titanate coupling agent, 10 parts of polyvinyl butyral resin, three oxygen
50 parts of mixture for changing two antimony and halogen compounds, wherein the mass ratio of antimony oxide and deca-BDE is 1:2.
Wherein, the bromine content of the tetrabormated bisphenol A epoxide resin is 51~52%, and softening point is at 125~130 degree.
The powdery paints of embodiment 4 uses the identical preparation method recorded with embodiment 1 to prepare.
Test example 1
After component in above-described embodiment 1 is mixed, the successively pre-dispersed, process of melting extrusion, tabletting by raw material
It carries out being processed into long 127mm, small sample of wide 12.7mm, maximum gauge 12.7mm.It carries out, will try in no ventilation experiment case
Sample upper end (place of 6.4mm) is clamped with the fixture on bracket, and keeps the axis oriented normal of sample.Sample lower end is away from lamp mouth
9.5mm, away from drying defatted cotton surface 305mm.Bunsen burner is lighted and is adjusted to the blue flame for generating 19mm high, Bunsen burner
Flame is placed in sample lower end, and light a fire 10s, when then removing flame (remote from sample at least 152mm), and writing down sample flaming combustion
Between.If removing the fray-out of flame of sample in 30s after flame, it is necessary to Bunsen burner be moved on to sample in the following, rekindling sample again
Light a fire 10s, then removes Bunsen flame again, and write down the after flame time of flaming combustion and the flameless combustion of sample.If examination
Sample molten drop has smoke particle, allows it to fall under sample on the absorbent cotton of 305mm, sees its absorbent cotton that whether ignites.If absorbent cotton catches fire,
Its factor is considered as when grading.
Specific graded index such as the following table 1, testing result such as table 2.
Table 1:
| Test item | 94V-0 | 94V-1 | 94V-2 |
| Light total flaming combustion time maximum value (S) ten times | 50 | 250 | 250 |
| A other flaming combustion time maximum value (s) | 10 | 30 | 30 |
| Glowing time (s) | 30 | 60 | 60 |
| Flame molten drop | Nothing | Nothing | Permission is only burnt in short-term |
In table 1, V-2: after carrying out 10 seconds combustion testings twice to sample, flame extinguishes in 60 seconds, can there is burning
Object is fallen.V-1: after carrying out 10 seconds combustion testings twice to sample, flame extinguishes in 60 seconds, cannot have comburant to fall.
V-0: after carrying out 10 seconds combustion testings twice to sample, flame extinguishes in 30 seconds, cannot have comburant to fall.From table 1
It can be seen that the product flame retardant property that the present embodiment 1 obtains is good.
Table 2:
As can be known from Table 2, reach V-0 grades using the coated article part heat resistance of the powdery paints of the present embodiment 1, compare with
The heat resistance of ordinary powder coating is more excellent.
Test example 2
By powder prepared by 1 scheme of above-described embodiment, the template by thickness no more than 0.3 ㎜ is placed in the cabinet that dusts, and use is quiet
Electric spray gun spraying, and the template sprayed is kept vertical, being put into solidification in ancient customs thermostatic drying chamber, (temperature is controlled at 180 DEG C
± 2 DEG C, the time 15 minutes, 50~60 μm of coating thickness), then in 23 DEG C of ± 2 DEG C of temperature and 50% ± 5% relative humidity
Under, cracking resistance or situation is removed from metal base plate when by GB/T6742-86 Germicidal efficacy film around cylinder bending shaft, as a result such as table
Shown in 3.
Table 3
The powdery paints film physical property that as can be seen from Table 3 prepared by the present embodiment 1 is more preferable.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. a kind of warping resistance type fire-proof powdery paint, it is characterised in that: it is mixed with to obtain by base-material, auxiliary material and auxiliary agent, it is described
Base-material includes the raw material of following parts by weight: 700~750 parts of brominated epoxy resin, 56~60 parts of crosslinking agent, and levelling agent 10~15
Part, 3~8 parts of styrax, 6~10 parts of optical brightener, 100~150 parts of blanc fixe；The auxiliary material includes calcium carbonate 150~180
Part, 200~250 parts of colorant；The auxiliary agent includes 5~10 parts of coupling agent, 5~10 parts of polyvinyl butyral resin, fire-retardant
35~50 parts of agent.
2. a kind of warping resistance type fire-proof powdery paint according to claim 1, it is characterised in that: the brominated epoxy resin
For tetrabormated bisphenol A epoxide resin, bromine content is 51~52%, and softening point is at 125~130 degree.
3. a kind of warping resistance type fire-proof powdery paint according to claim 1 or 2, it is characterised in that: in the base-material, hand over
Connection agent is two hydrazides of sebacic acid, and levelling agent is Vinalac 5920, and styrax is benzoin, and optical brightener is poly- methyl-prop
E pioic acid methyl ester.
4. a kind of warping resistance type fire-proof powdery paint according to claim 3, it is characterised in that: in the auxiliary agent, coupling
Agent is preferably chelating titanate coupling agent.
5. a kind of warping resistance type fire-proof powdery paint according to claim 1,2 or 4, it is characterised in that: described is fire-retardant
The mixture of agent selection antimony oxide and halogen compounds；Wherein, the mass ratio of the antimony oxide and halogen is 1:2-
2.5。
6. a kind of warping resistance type fire-proof powdery paint according to claim 5, it is characterised in that: the halogen is ten bromines two
Phenylate.
7. a kind of warping resistance type fire-proof powdery paint according to claim 6, it is characterised in that: by base-material, auxiliary material and help
Agent is mixed with to obtain, and the base-material includes the raw material of following parts by weight: 700 parts of tetrabormated bisphenol A epoxide resin, sebacic acid two
56 parts of hydrazides, 10 parts of Vinalac 5920,3 parts of benzoin, 6 parts of polymethyl methacrylate, blanc fixe 100
Part；The auxiliary material includes 150 parts of calcium carbonate, 200 parts of colorant；The auxiliary agent includes 6 parts of chelating titanate coupling agent, poly- second
35 parts of the mixture of 6 parts of enol butyral resin, antimony oxide and deca-BDE, wherein antimony oxide and decabrominated dipheny
The mass ratio of ether is 1:2.
8. a kind of preparation method of warping resistance type fire-proof powdery paint as described in any one of claim 1-7, feature
It is, comprising the following steps:
Step 1: it successively by base-material and auxiliary agent investment mixing tank, mixes 5~6 minutes, obtains partial blend；
Step 2: auxiliary material being added into partial blend, in mixing 5~6 minutes, obtains whole mixtures；
Step 3: by whole mixtures by double screw extruder melting extrusion, area's extrusion temperature is 90 DEG C, and 2nd area squeeze out temperature
105 DEG C of degree, 350 revs/min of screw speed, obtains fused materials by 120 revs/min of feeding revolving speed；
Step 4: pass through tabletting machine for fused materials are obtained in step 3, then communicated band is transmitted to crusher and carries out brokenly
It is broken；
Step 5: the sheet stock in step 4 is granulated into tiny sheet stock by broken crusher machine, then tiny sheet stock is passed through into air
Grading mill is ground into fine powder, finally by fine powder after vibrating screen sieves up to the powdery paints；Wherein, vibrating screen frequency is
1500 beats/min, mesh size is 88 μm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112300660A (en) * | 2020-10-22 | 2021-02-02 | 河北盛可居装饰材料有限公司 | Polymer electrostatic powder capable of improving flame retardant property of plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112300660A (en) * | 2020-10-22 | 2021-02-02 | 河北盛可居装饰材料有限公司 | Polymer electrostatic powder capable of improving flame retardant property of plate |
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Application publication date: 20190806 |