CN105647302A - Superfine fluorocarbon powder paint with high weather resistance - Google Patents
Superfine fluorocarbon powder paint with high weather resistance Download PDFInfo
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- CN105647302A CN105647302A CN201610144323.7A CN201610144323A CN105647302A CN 105647302 A CN105647302 A CN 105647302A CN 201610144323 A CN201610144323 A CN 201610144323A CN 105647302 A CN105647302 A CN 105647302A
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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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/16—Homopolymers or copolymers of vinylidene fluoride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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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
- C09D5/031—Powdery paints characterised by particle size or shape
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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
- C09D5/032—Powdery paints characterised by a special effect of the produced film, e.g. wrinkle, pearlescence, matt finish
-
- 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
- C09D5/036—Stabilisers
-
- 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
- C09D5/08—Anti-corrosive paints
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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 invention discloses superfine fluorocarbon powder paint with high weather resistance. The superfine fluorocarbon powder paint comprises 70% of PVDF (polyvinylidene fluoride) resin and inorganic ceramic pigment. The superfine fluorocarbon powder paint has the advantages that the PVDF resin and the inorganic ceramic pigment which are expensive raw materials are combined with each other, accordingly, high-grade buildings can be protected at the highest level, the thicknesses of coatings can be reduced by the aid of specific superfine powder paint technologies on the basis that the original performance is kept, and the cost can be saved; the buildings can keep as beautiful as new for a long time by the aid of the thermoplastic fluorocarbon powder paint, the dirt resistance, the pulverization and color change resistance and the ultraviolet decomposition resistance of the buildings can be protected by the thermoplastic fluorocarbon powder paint in the harshest global natural environments for a long time, and the thermoplastic fluorocarbon powder paint can be widely applied to internally and externally decorating aluminum section bars for advanced buildings, advertisement boards, metal curtain walls, protective fences/sound-insulation boards of high-speed railways and large buildings such as airports, wharves, train stations and high-speed rail stations.
Description
Technical field
The invention belongs to coating manufacture field, particularly to a kind of ultra-fine fluorocarbon powder paint of high-weatherability.
Background technology
Along with growth in the living standard, people also strengthen day by day for the consciousness of environmental protection, particularly pay attention to the impact for oneself health of the environmental quality issues in the middle of oneself work, life. And we live in the middle of must reach over to household electrical appliances, railing, the surface such as building is all it is necessary to have coating carrys out application to keep its aesthetic property and weatherability. Several years ago, appliance industry, urban operating mechanism and building industry all adopt liquid coating to carry out application, coating is thin, coated object is attractive in appearance feature that it has, but it needs solvent to serve as medium, have the advantages that contaminated environment infringement user is healthy. As time goes on, this kind of coating has logged out paint industry, is substituted by powdery paints gradually. Powdery paints is entirely free of solvent with it; film can be completely converted into; and coating efficiency is high, protect and decorate the feature of good combination property; adapt to coatings industry to economizing on resources and the energy, alleviating environmental pollution and improve the aspect requirement such as work efficiency; being subject to global extensive attention, developing rapidly thus obtaining. But the coating of powdery paints is thicker than liquid coating, somewhat more inferior with in aesthetics on cost. The development of following powdery paints, will develop towards thin and weatherability length direction. China is powdery paints big producing country of the world, and the base material of present powdery paints is mainly thermosetting resin (such as epoxy and polyester) and thermoplastic resin (such as PVC, nylon and fluorocarbon resin etc.). China's powdery paints is based on thermosetting, and the yield of thermoplastic powder coating is little, and having also is based on PVC.
And since American scientist in 1938 synthesizes politef, the development of fluorine material, production, processing and application obtain very big development. Present stage fluorocarbon powder paint mainly has two big classes, the thermoplastic fluoroelastomer Fluoropolymer Powder Coatings that a class is is base material with resins such as PVDF (vinylidene), ETFE (ethylene-tetrafluoroethylene copolymer), ECTFE (ethylene-chlorotrifluoro-ethylene copolymer);Another kind of is with the thermosetting fluorocarbon powder coatings of CTFE/tetrafluoroethene and vinyl ethers or vinyl ester monomer copolymerization, and development in recent years is very rapid. Fluoro coatings, owing to having multiple premium properties, is outshined othersOne branch of the tree is particularly thriving in coatings industry develops, and particularly chemical resistance, thermostability and weather resistance are significantly better than other coating variety, have very big market application foreground. Present stage, China and south east asia to the potential demand amount of fluorocarbon powder paint close to US and European level.
The present inventor is devoted to the research of thermoplastic fluoroelastomer Fluoropolymer Powder Coatings, to solving the bottleneck of thermoplastic coating development and the problem that powder coating and their application thickness offset, gloss and levelability are poor. This PVDF resin of used for powder coating 70% and inorganic ceramic pigment are prepared from; the top-grade building thing that is combined as of two kinds of expensive raw materials provides the protection of highest ranking; plus the distinctive ultrafine powder paint technology of the present invention; on the basis keeping original performance; reduce coating layer thickness, save cost. The present invention's it is important that develop and a building can be kept for a long time beautiful as new; the ability that protection building has anti-dirty, anti-powdering variable color for a long time in the harshest natural environment in the whole world and UV resistant decomposes simultaneously, it is possible to be widely used in the thermoplastic fluoroelastomer Fluoropolymer Powder Coatings of the building internal and external ornaments such as senior building aluminium section bar, billboard, metal curtain wall, high-speed railway guard rail/baffle, airport/harbour/railway station/high ferro station.
Summary of the invention
The present invention is directed to the defect that prior art exists, it is therefore intended that provide a kind of ultra-fine fluorocarbon powder paint of high-weatherability.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of ultra-fine fluorocarbon powder paint of high-weatherability, it is characterised in that:
According to percentage by weight, the PVDF resin by 70% and inorganic ceramic pigment, 30% auxiliary agent is prepared from. Described auxiliary agent is an aqueous materials, and in the preparation process of product, the diameter according to required product granule adds, and plays an effect built bridge, improve the compatibility of resin and pigment in products material, directly reduces particle diameter size; Described auxiliary agent name is called TINUVIN144., high-performance NOR-type hindered amine as light stabilizer, light stabilizer photomask agent can reflect or absorb solar ultraviolet, be namely arrange between coating with light source together with barrier, ultraviolet is stoped to go deep into coat inside, thus can coating be protected;
The concrete formula of described auxiliary agent is: the ratio of resin and light stabilizer 80:20 by weight mixes.
Described light stabilizer chemical name:Succinic acidPolymer with 4-hydroxyl-2,2,6,6-tetramethyl-1-piperidine alcohols
Described resinification formal name used at school: the saturated polyester synthesized for polyhydric alcohol and polyprotic acid, chemical structural formula is as follows:
The novelty of the product of the present invention is mainly reflected in the prolongation of the time thinning, weather-proof of the reduction of product particle, coating, and this three is closely bound up certainly, and the realization of these performances will rely on the production equipment after improvement. Adopt the screening of stepless, after a product diameter specifications is set, do not meet will not separating of this specification, remaining be all consistent with production requirement, and the gap between powder diameter is held within 1 micron. It is thinning with diminishing of coating that this innovation adds that the change of formula has directly reached granule.
Present invention also offers the production equipment of the ultra-fine fluorocarbon powder paint of above-mentioned high-weatherability, it is characterised in that:
Combined by following apparatus: drawing-in device, main mill mill chamber, grader and cyclone separator, cleaner unit, air-introduced machine form a set of hierarchy system.
Material has drawing-in device to main mill mill chamber under blower fan draft effect, is ground under grinding hammer. With groove grinds hammer can greatly improve nonferromagnetic substance, therefore can effectively process the material of various characteristic and shape. By grader lower end feeding mouth with ascending air high-speed motion to graded region, under the powerful centrifugal action that the stage turbine of high speed rotating produces, make thickness feed separation, the fine grained meeting Particle size requirements enters cyclone separator or cleaner unit collection by grading wheel impeller clearance, after coarse granule entrainment portions fine grained hits wall, speed disappears, overfiren air port place is dropped to along barrel, strong elutriation effect through secondary wind, large or fine granule is made to separate, fine grained rises to graded region secondary grading, and coarse granule drops to discharge port place and discharges
High performance bearing arrangement ensure that running up of grader, thus producing superfine powder. And utilize the effect of guide ring, the powder body size of output can be adjusted, thus obtaining different types of product feed arrangement to adopt the venetian blind type structure of oblique air intake, so can increase the draught area of grinding machine, reduce the air intake resistance of grinding machine, the commensurability heat-exchange capacity enhancing grinding machine, it is possible to be effectively prevented the putty phenomenon of coal mill import.
Present invention also offers the spraying method of the ultra-fine fluorocarbon powder paint of a kind of high-weatherability, it is characterised in that:
Metal works carries out ground connection, is surface of workpiece positively charged, and powder particle is electronegative through spray gun, and both are attracting, and the thickness controlling coating must control the powder outlet quantity of powder, the particle diameter etc. of powder. The solidification baking temperature of powder is that surface of the work reaches 220 degree, and temperature retention time is 20 minutes. Make coating be maintained at 40 microns, under the premise saving cost, extend weather-proof time, superior performance.
The invention have benefit that:
(1) this product powder particle size is maintained at 25 microns, compares common 35-40 micron and totally reduces more than 10 microns. The powder particle interval span made by the improvement (gradation sizing) of separation equipment is narrowed, allow product powder particle evenly, client construction and product filming performance have very big assosting effect.
(2) this product is due to interval the diminishing of gap between reduction and many grain diameters of particle diameters, and gap is at 1 micron; And have a long way to go between originally common product crowd's grain diameter, big phase difference 15 microns, cause combining between granule closely fineless and smooth, finally cause the rising of coating layer thickness. The coating of this product, as utilized the spraying coating process of advanced person can accomplish 20-40 micron, is close to the coating layer thickness close to liquid coating. This product the experiment proved that, coating is best at 40 microns; But common fluorocarbon powder paint coating is at 80-100 micron not etc., being coated with thin to arise that the phenomenon of dew base material, this product then can realize shallow layer and the strong flat smooth of surface levelability, is substantially reduced the use cost of product for client.
(3) change of thinning, the technique of this product coating and formula, multiple technologies innovation finally achieves the prolongation of weather-proof time. This product selects high-quality raw material to be in particular the aqueous promoter increasing the weather-proof time development of product plus company, strengthens the weather resistance of product. Now the weather-proof time of this product is through artificial accelerated aging more than 1000 hours, normal out of doors can keep more than 35 years bright and new beautiful when using.
(4) coating of this product is owing to have employed PVDF system, and this system chemical-resistance is remarkable, and in product use procedure in the future, energy is acid-proof, alkali prevention better
(4) this product possesses resistance to 400 DEG C of high temperature above and Anticorrosive Character, can be described as multifunctional fluoric Fluoropolymer Powder Coatings, eliminates the limitation of fluorine product, allows product use more extensive.
Detailed description of the invention
Embodiment 1 prepares formulation for coating material 1:
A kind of ultra-fine fluorocarbon powder paint of high-weatherability, its formula is:
According to percentage by weight, PVDF resin by 65% and 5% inorganic ceramic pigment, 30% auxiliary agent is prepared from. Described auxiliary agent name is called TINUVIN144., high-performance NOR-type hindered amine as light stabilizer, light stabilizer photomask agent can reflect or absorb solar ultraviolet, be namely arrange between coating with light source together with barrier, ultraviolet is stoped to go deep into coat inside, thus can coating be protected;
The concrete formula of described auxiliary agent is: the ratio of resin and light stabilizer 80:20 by weight mixes.
Described light stabilizer chemical name:Succinic acidPolymer with 4-hydroxyl-2,2,6,6-tetramethyl-1-piperidine alcohols
Described resinification formal name used at school: the saturated polyester synthesized for polyhydric alcohol and polyprotic acid, chemical structural formula is as follows:
Embodiment 2 prepares formulation for coating material 2:
A kind of ultra-fine fluorocarbon powder paint of high-weatherability, its formula is:
According to percentage by weight, PVDF resin by 60% and 10% inorganic ceramic pigment, 30% auxiliary agent is prepared from. Described auxiliary agent name is called TINUVIN144., high-performance NOR-type hindered amine as light stabilizer, light stabilizer photomask agent can reflect or absorb solar ultraviolet, be namely arrange between coating with light source together with barrier, ultraviolet is stoped to go deep into coat inside, thus can coating be protected;
The concrete formula of described auxiliary agent is: the ratio of resin and light stabilizer 80:20 by weight mixes.
Described light stabilizer chemical name:Succinic acidPolymer with 4-hydroxyl-2,2,6,6-tetramethyl-1-piperidine alcohols
Described resinification formal name used at school: the saturated polyester synthesized for polyhydric alcohol and polyprotic acid, chemical structural formula is as follows:
Embodiment 3 prepares formulation for coating material 3:
A kind of ultra-fine fluorocarbon powder paint of high-weatherability, its formula is:
According to percentage by weight, PVDF resin by 68% and 2% inorganic ceramic pigment, 30% auxiliary agent is prepared from. Described auxiliary agent name is called TINUVIN144., high-performance NOR-type hindered amine as light stabilizer, light stabilizer photomask agent can reflect or absorb solar ultraviolet, be namely arrange between coating with light source together with barrier, ultraviolet is stoped to go deep into coat inside, thus can coating be protected;
The concrete formula of described auxiliary agent is: the ratio of resin and light stabilizer 80:20 by weight mixes.
Described light stabilizer chemical name:Succinic acidPolymer with 4-hydroxyl-2,2,6,6-tetramethyl-1-piperidine alcohols
Described resinification formal name used at school: the saturated polyester synthesized for polyhydric alcohol and polyprotic acid, chemical structural formula is as follows:
The processing of embodiment 4 powdery paints:
The ultra-fine fluorocarbon powder paint of above-mentioned high-weatherability is by equipment produced by below, and described production equipment is combined by following apparatus: drawing-in device, main mill mill chamber, grader and cyclone separator, cleaner unit, air-introduced machine form a set of hierarchy system.
Material has drawing-in device to main mill mill chamber under blower fan draft effect, is ground under grinding hammer. With groove grinds hammer can greatly improve nonferromagnetic substance, therefore can effectively process the material of various characteristic and shape. By grader lower end feeding mouth with ascending air high-speed motion to graded region, under the powerful centrifugal action that the stage turbine of high speed rotating produces, make thickness feed separation, the fine grained meeting Particle size requirements enters cyclone separator or cleaner unit collection by grading wheel impeller clearance, after coarse granule entrainment portions fine grained hits wall, speed disappears, overfiren air port place is dropped to along barrel, strong elutriation effect through secondary wind, large or fine granule is made to separate, fine grained rises to graded region secondary grading, and coarse granule drops to discharge port place and discharges
High performance bearing arrangement ensure that running up of grader, thus producing superfine powder.And utilize the effect of guide ring, the powder body size of output can be adjusted, thus obtaining different types of product feed arrangement to adopt the venetian blind type structure of oblique air intake, so can increase the draught area of grinding machine, reduce the air intake resistance of grinding machine, the commensurability heat-exchange capacity enhancing grinding machine, it is possible to be effectively prevented the putty phenomenon of coal mill import.
The spraying coating process of embodiment 5 powdery paints:
Embodiment 2 produces the carrying out obtaining the ultra-fine fluorocarbon powder paint of high-weatherability and sprays, and method is:
Metal works carries out ground connection, is surface of workpiece positively charged, and powder particle is electronegative through spray gun, and both are attracting, and the thickness controlling coating must control the powder outlet quantity of powder, the particle diameter etc. of powder. The solidification baking temperature of powder is that surface of the work reaches 220 degree, and temperature retention time is 20 minutes. Make coating be maintained at 40 microns, under the premise saving cost, extend weather-proof time, superior performance.
Embodiment 6 result is tested:
This product powder particle size is maintained at 25 microns, compares common 35-40 micron and totally reduces more than 10 microns. The powder particle interval span made by the improvement (gradation sizing) of separation equipment is narrowed, allow product powder particle evenly, client construction and product filming performance have very big assosting effect.
This product is due to interval the diminishing of gap between reduction and many grain diameters of particle diameters, and gap is at 1 micron; And have a long way to go between originally common product crowd's grain diameter, big phase difference 15 microns, cause combining between granule closely fineless and smooth, finally cause the rising of coating layer thickness. The coating of this product, as utilized the spraying coating process of advanced person can accomplish 20-40 micron, is close to the coating layer thickness close to liquid coating. This product the experiment proved that, coating is best at 40 microns; But common fluorocarbon powder paint coating is at 80-100 micron not etc., being coated with thin to arise that the phenomenon of dew base material, this product then can realize shallow layer and the strong flat smooth of surface levelability, is substantially reduced the use cost of product for client.
Thinning, the technique of this product coating and the change of formula, multiple technologies innovation finally achieves the prolongation of weather-proof time. This product selects high-quality raw material to be in particular the aqueous promoter increasing the weather-proof time development of product plus company, strengthens the weather resistance of product. Now the weather-proof time of this product is through artificial accelerated aging more than 1000 hours, normal out of doors can keep more than 35 years bright and new beautiful when using.
The coating of this product is owing to have employed PVDF system, and this system chemical-resistance is remarkable, and in product use procedure in the future, energy is acid-proof, alkali prevention better
This product possesses resistance to 400 DEG C of high temperature above and Anticorrosive Character, can be described as multifunctional fluoric Fluoropolymer Powder Coatings, eliminates the limitation of fluorine product, allows product use more extensive.
Test other specific performances further:
Identation hardness
Coating pressure mottling resistance >=80.
Tack
2mm spacing, is divided into 100 lattice, after sticking with viscose bag, if coating shedding is less than or equal to 5 lattice, is then 0 grade.
Cup drawing resistance
Through AEG-process, be more than or equal to 7mm, coating is without cracking or obscission.
Salt fog resistance
After the acetic acid salt spray of 1000h is tested, the coating surface after visual examination test, should without bubbling, coming off or other significant changes, two side forms of ruling place an order limit permeating corrosion width should less than 4mm.
Humidity resistance
After the damp heat test of 1000h, the coating surface after visual examination test, should without bubbling, coming off or other significant changes.
Accelerate weatherability
Weatherability irradiates artificial accelerated aging test time and result of the test according to xenon lamp, is divided into two grades, and weatherability grade is selected by demanding party, unselected presses I grade.
Result is as shown in table 1 below:
The above; it is only the present invention preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; any those familiar with the art is in the technical scope that the invention discloses; it is equal to replacement according to technical scheme and inventive concept thereof or is changed, all should be encompassed within protection scope of the present invention.
Claims (3)
1. the ultra-fine fluorocarbon powder paint of high-weatherability, it is characterised in that:
According to percentage by weight, the PVDF resin by 70% and inorganic ceramic pigment, 30% auxiliary agent is prepared from; The concrete formula of described auxiliary agent is: the ratio of resin and light stabilizer 80:20 by weight mixes;
Described light stabilizer chemical name: the polymer of succinic acid and 4-hydroxyl-2,2,6,6-tetramethyl-1-piperidine alcohols
Described resinification formal name used at school: the saturated polyester synthesized for polyhydric alcohol and polyprotic acid, chemical structural formula is as follows:
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2. the production equipment of the ultra-fine fluorocarbon powder paint of high-weatherability described in claim 1, it is characterised in that:
Combined by following apparatus: drawing-in device, main mill mill chamber, grader and cyclone separator, cleaner unit, air-introduced machine form a set of hierarchy system.
3. the spraying method of the ultra-fine fluorocarbon powder paint of high-weatherability described in claim 1, it is characterised in that:
Metal works carries out ground connection, is surface of workpiece positively charged, and powder particle is electronegative through spray gun, and both are attracting, and the thickness controlling coating must control the powder outlet quantity of powder, the particle diameter etc. of powder; The solidification baking temperature of powder is that surface of the work reaches 220 degree, and temperature retention time is 20 minutes, makes coating be maintained at 40 microns.
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| CN201610144323.7A CN105647302A (en) | 2016-03-14 | 2016-03-14 | Superfine fluorocarbon powder paint with high weather resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334132A (en) * | 2020-03-02 | 2020-06-26 | 成都新柯力化工科技有限公司 | High-sphericity superfine thermoplastic powder coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104334660A (en) * | 2012-06-29 | 2015-02-04 | 旭硝子株式会社 | Powder coating composition, method for producing cured film, and coated article |
| CN105368183A (en) * | 2015-11-24 | 2016-03-02 | 安徽省金盾涂料有限责任公司 | Weather-resistant PVDF fluorocarbon powder coating |
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2016
- 2016-03-14 CN CN201610144323.7A patent/CN105647302A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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