CN109365239A - Coiled material powder coating and their application method, powdery paints and coiled material preparation method - Google Patents

Coiled material powder coating and their application method, powdery paints and coiled material preparation method Download PDF

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Publication number
CN109365239A
CN109365239A CN201811093553.0A CN201811093553A CN109365239A CN 109365239 A CN109365239 A CN 109365239A CN 201811093553 A CN201811093553 A CN 201811093553A CN 109365239 A CN109365239 A CN 109365239A
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CN
China
Prior art keywords
parts
powder
coating
flour
coiled material
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Pending
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CN201811093553.0A
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Chinese (zh)
Inventor
郭黎晓
王中龙
郭亦之
戴恒
何欣
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Jiangsu Dolphin Powder New Materials Co Ltd
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Jiangsu Dolphin Powder New Materials Co Ltd
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Priority to CN201811093553.0A priority Critical patent/CN109365239A/en
Publication of CN109365239A publication Critical patent/CN109365239A/en
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    • 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
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • 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
    • B05D3/0263—After-treatment with IR heaters
    • 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/542—No clear coat specified the two layers being cured or baked together
    • 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
    • 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
    • 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
    • C09D133/00—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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • 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
    • 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
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • 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
    • C09D5/08—Anti-corrosive paints
    • 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
    • B05D2301/00—Inorganic additives or organic salts thereof
    • 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
    • B05D2320/00—Organic additives
    • 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
    • B05D2502/00—Acrylic polymers
    • 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
    • B05D2503/00—Polyurethanes
    • 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
    • B05D2504/00—Epoxy polymers
    • 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
    • B05D2506/00—Halogenated polymers
    • B05D2506/10—Fluorinated polymers
    • 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
    • B05D2508/00—Polyesters
    • 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
    • B05D2601/00—Inorganic fillers
    • B05D2601/02—Inorganic fillers used for pigmentation effect, e.g. metallic effect
    • B05D2601/10—Other metals
    • 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
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0893—Zinc
    • 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
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide

Abstract

The present invention relates to application techniques fields, and in particular to the preparation method of a kind of coating process of coiled material powdery paints, powdery paints and coating coiled material.Wherein this coating process includes: the bottom powder of first one layer of corrosion resistance of coating on substrate, then the one level powder of coating again on the powder of bottom, finally by bottom powder and flour together baking-curing, successfully realizes that the two of coil painting apply a curing process；The invention overcomes the solidification difference problem of bottom powder and flour by the partial size and coating layer thickness for controlling bottom powder, and then solves the problems, such as that flour coating corrosion resistance is imperfect.

Description

Coiled material powder coating and their application method, powdery paints and coiled material preparation method
Technical field
The invention belongs to application techniques fields, and in particular to a kind of coating process, the powdery paints of coiled material powdery paints And the preparation method of coating coiled material.
Background technique
With the reinforcement that global environmental protection is realized, powder have it is economical, efficiently, environmental protection and save can (often claim 4E: Economical, Efficient, Environmental, Energy Saving) the advantages that and developed rapidly, increasingly More liquid coatings are substituted by powder, bring good environmental benefit and economic benefit.But there are also many fields still big Amount is using also liquid coating, this is that should be in these fields, and powder coating hampers powdery paints there is also various technical problems Application.
Coiled material powder coating is primarily referred to as the coating of color steel plate and the coating of color aluminium sheet, is the continuous painting in high-speed cruising The single side or two-sided and quick baking that coating is equably painted on to the substrate of the plane after opening a book on assembling production lines solidify, so Afterwards using the coating process of the processes such as cooling winding.The characteristics of coil painting is rapidly and efficiently coating even uniform and painting Layer is very thin, and production cost is low, and production yields is big.The linear velocity of color steel plate coating is usually at 60-80 ms/min, and most fast 180 M/min.It is the Large Efficient painting mode of modernization.Product after coil painting, which is mostly transported at web-like, to be stored, usually Product can be used as last by needing to carry out the molding process of post-processing.It is as each in needed to be processed into after color steel plate coating Kind Wahlen plate or sandwich insulation board are just used as roof or roofing；And majority of case needs will do plastic-aluminum after color aluminium sheet coating The products such as plate or cellular board can be used finally.No matter color steel plate product or color aluminum sheet product, be all one have it is very big The industry of yield, the only color steel plate coating of China, just there is 15,000,000 tons of yield every year.Regrettably, the whole world at present Coil painting be almost using liquid coating, there are no largely use powder coating.In decades, using powdery paints The research and development for carrying out coil painting are carrying out always, but by technical restriction, as a result and bad.
In the technology barrier of limitation coil painting " oil is disguised ", the higher cost of powder coating is a major reason. The production technology that coil painting generally uses two paintings two roasting is exactly first one layer of preferable bottom of corrosion resistance of coating on substrate Paint, into after stove baking-curing, then applies one layer of pigmented top coat, and toasts second and complete coating.Two apply two roasting main purposes It is the corrosion resistance for improving coating.The finishing coat of single coating is typically not capable of the corrosion resistance of double coatings, in coil painting row Industry is rarely employed.
The obstacle that the oil of coil painting is disguised, the mainly higher cost of powder coating.The coating of powdery paints is usually very Thickness, single coating just need 40-80 microns, if it is even more impossible to receive for cost thinking that liquid coating does two paintings, two curing process like that. Then, most research and development trial all concentrates on single coating coating, i.e. one layer of powder.And single coating powder coating product is resistance to Corrosive nature is not achieved double coatings and similarly toasts.Nevertheless, cost is still high compared with liquid coating, and single coating is anti- Corrosive nature is difficult compared with the coating of double coatings.Although world community is all in actively research and development coiled material powder coating, at present Until, almost without powder coating can be passed through in industrialization coiled material on the basis of liquid coating product identical cost performance Mass production.The powder coating process method for being able to produce that cost is relatively low and has same performance with liquid coating is developed, it is right It realizes that the oil of entire industry disguises and can all have great progradation, there is huge Social benefit and economic benefit.
Summary of the invention
The object of the present invention is to provide a kind of coiled material powder coating and their application method, powdery paints and coiled material preparation method, First on the substrate opened a book one layer of corrosion resistance of coating bottom powder, the then one level powder of coating again on the powder of bottom, finally the bottom of by Baking-curing by controlling the partial size and coating layer thickness of bottom powder improves the corrosion resistance of flour coating together for powder and flour.
In order to solve the above-mentioned technical problems, the present invention provides a kind of coating process, include the following steps: first opening a book The bottom powder of one layer of corrosion resistance of coating on substrate, the then one level powder of coating again on the powder of bottom, finally by bottom powder and flour one Play baking-curing.
Specifically, the bottom powder and flour are suitable for through infrared baking furnace baking-curing, and baking temperature is 180-200 DEG C, Baking time is 10-14min.Oven can be picture liquid coating equipment commonly various gas furnaces, be also possible to infrared baking Furnace, or other heating stoves, it is ensured that powder is sufficiently solidified.The coiled material of the application is particularly suitable for infrared baking with powdery paints It is roasting, it being capable of rapid curing, the saving energy.Powder finish line can be the completely new paint line newly built, and be also possible to original liquid The coating equipment of line transformation.
Optionally, the substrate is aluminium sheet coiled material, steel plate, copper sheet or hot dip galvanizing substrate.It is generally necessary to be pre-processed (table Face phosphatization opens a book, flattens) coating again later.
It is well known that two kinds of powder are because of solidification cross-linking process the powdery paints of two different compositions solidifies together when It is inconsistent, can caused by coating film forming it is uneven, or even can not form a film, we term it " crosslinking difference " problems.Crosslinking Difference problem is exactly, with temperature increases, respectively to melt because the powdery paints of different compositions solidifies together when, is cured in fact Whether the same time and speed is, this species diversity will lead to coating shrinkage, arrange different, and less serious case causes the out-of-flatnesses such as orange peel Coating, severe one can generate not film forming phenomenon.The present invention has found by many experiments, using the thinner bottom powder of partial size and reduces bottom The coating layer thickness of powder can greatly reduce or even overcome completely crosslinking difference problem.Moreover, the partial size and coating layer thickness of bottom powder can also Influence the adhesive force of corrosion resistance and flour and the film forming of flour coating.Due to coiled material need through opening a book, coating and Cooling winding after coating, so the requirement to flour adhesive force and corrosion resistance is higher than common plane substrate.In consideration of it, In this application, the partial size of the bottom powder is 13-30 microns；And the coating layer thickness of the bottom powder is 1-25 microns.
Optionally, the bottom powder mixes with flour, so that bottom powder and the flour crosslinking curing in baking, increase flour and base The adhesive force of material.The bottom powder can be immediately miscible with flour, after the powder of coating bottom can coating flour, during which do not need the time Interval.Further, since bottom powder is transparent powder or has toner, before baking-curing, the bottom powder and flour that substrate surface is fallen are mixed Together, reusing for flour is nor affected on, waste is avoided.
The bottom powder of the first one layer of corrosion resistance of coating on the substrate opened a book of the coating process of the application, then on the powder of bottom One level powder of coating again successfully realizes that the two of flour apply a curing process finally by bottom powder and flour together baking-curing；And pass through The partial size and thickness for reducing bottom powder, can increase the capacitive that mixes of bottom powder and flour, reduce bottom powder and difference when flour solidifies, Not only cost has been saved, but also has improved the adhesive force of flour, under conditions of having little influence on the coating surface uniformity, has realized that two apply One roasting new process.
Further, the bottom powder and flour are all made of the mode coating of electrostatic powder coating；It will be fluidized with electrostatic gun The powder ejection of state is simultaneously charged, is then adsorbed on substrate under the action of electric field again, bottom powder and flour is avoided to toast It falls off before solidification.Optionally, the coating mode is also possible to the fluidisation dip-coating of fluidized bed, the hot dip coating of fluidized bed or the dizzy cloud of point The methods of mist absorption.
Further, the bottom powder is corrosion resistance powder；The i.e. described corrosion resistance powder be epoxy powder, polyester powder, One or more of polyester epoxy powder, acrylic clear powder, polyurethane powder, FEVE fluorine carbon dust, can be added pigment and fill out Material and auxiliary agent, to increase adhesive force and corrosion resistance.
Optionally, the epoxy powder includes the substance of following parts by weight: epoxy resin: 300-600 parts；Curing agent: 80- 120 parts；Methylimidazole: 3-8 parts；Styrax: 2-10 parts；Levelling agent: 5-15 parts；Titanium dioxide: 0-160 parts；Strontium chromate: 0- 140 parts；And zinc powder: 0-170 parts.
Optionally, the polyester powder includes the substance of following parts by weight: polyester resin: 400-550 parts；Curing agent: 30- 45 parts；Styrax: 0.5-3 parts；Levelling agent: 3-7 parts；Titanium dioxide: 0-160 parts；And strontium chromate: 0-150 parts.
Optionally, the polyester epoxy powder includes the substance of following parts by weight: polyester resin: 400-550 parts；Asphalt mixtures modified by epoxy resin Rouge: 300-350 parts；Styrax: 1.5-2.5 parts；Titanium dioxide: 100-170 parts；Levelling agent: 4-8 parts；Strontium chromate: 0-130 parts；With And zinc powder: 30-85 parts.
Optionally, the acrylic clear powder includes the substance of following parts by weight: acrylic resin: 200-450 parts；Certain herbaceous plants with big flowers two Acid: 8-18 parts；Levelling agent: 3-8 parts；Titanium dioxide: 90-110 parts；Styrax: 1-5 parts；And strontium chromate: 0-125 parts.
Optionally, the polyurethane powder includes the substance of following parts by weight: the first hydroxy resin: 120-150 parts；The Two kinds of hydroxy resins: 250-300 parts；Isocyanate curing agent: 160-200 parts；Styrax: 1-6 parts；Levelling agent: 0.05-0.2 Part；Titanium dioxide: 130-160 parts；And strontium chromate: 50-150 parts.
Optionally, the FEVE fluororesin powder includes the substance of following parts by weight: FEVE fluorocarbon resin: 400-600 parts； Curing agent: 40-65 parts；Titanium dioxide: 0-200 parts；Styrax: 2-4 parts；Levelling agent: 3-7 parts；And strontium chromate: 0-150 parts.
Further, the flour is one or more of polyester flour, polyurethane flour, PVDF fluorine carbon flour.It is described Flour is common flour coating, can add weather-proof pigment thereto, the occasions such as roofing, metope for building, It can be used for many fields such as furniture, household electrical appliances, automobile.
Optionally, the polyester flour includes the substance of following parts by weight: polyester resin: 480-560 parts；Curing agent (TGIC): 30-50 parts；Styrax: 1-6 parts；Optical brightener: 3-5 parts；Levelling agent: 2-9 parts；Titanium dioxide: 0-180 parts；Phthalocyanine blue: 0-80 parts；Barium sulfate: 0-150 parts；And pearlescent pigment: 0-50 parts.
Optionally, the polyurethane flour includes the substance of following parts by weight: the first hydroxy resin: 130-145 parts；The Two kinds of hydroxy resins: 250-300 parts；Isocyanate curing agent: 180-195 parts；Styrax: 2-4 parts；Levelling agent: 0.08-0.15 Part；Titanium dioxide: 50-165 parts；Phthalocyanine blue: 55-70 parts；Barium sulfate: 70-90 parts；And pearlescent pigment: 25-35 parts.
Optionally, the PVDF fluorine carbon flour includes the substance of following parts by weight: thermoplastic acrylic resin: 280-320 Part；PVDF fluorocarbon resin: 650-750 parts；Levelling agent: 8-12 parts；Titanium dioxide: 40-260 parts；Buff: 180-240 parts；Pearly-lustre Pigment: 0-70 parts；And cladding aluminium powder: 0-65 parts.
Another aspect, the present invention also provides a kind of coiled material powdery paints, comprising: the bottom powder and flour independently stored； The bottom powder is suitable for the substance including the respective components in foregoing coating process；And the flour is suitable for including as before The substance of respective components in the coating process.
On the other hand, the present invention also provides a kind of preparation methods of coating coiled material, comprising: coiled material substrate is opened a book；It will Coiled material powder coating and their application is on the coiled material substrate after opening a book；And cooling winding；Wherein the coiled material is suitable with powdery paints In on the coiled material substrate being painted on by foregoing coating process after opening a book.
Optionally, the coating coiled material is such as, but not limited to color steel plate and color aluminium sheet.Specifically, in the continuous of high-speed cruising Paint line on coating is equably painted on the coiled material substrate surface after opening a book (can be single side or two-sided), and Quick baking solidification, the then preparation of the completion coating coiled material such as cooling winding again.
The invention has the advantages that the first one layer of corrosion resistance of coating on the substrate opened a book of coating process of the invention Bottom powder, then the one level powder of coating again on the powder of bottom successfully realizes flour finally by bottom powder and flour together baking-curing Two apply a curing process；By controlling the partial size and coating layer thickness of bottom powder, the corrosion resistance of flour coating is improved, the painting of the application is made Dress method can be widely applied to coil painting industry.
Specific embodiment
Embodiment 1
The bottom powder selects epoxy powder, and concrete operations are as follows: squeezing epoxy powder from extruder at 110-130 DEG C Out, it then is polishing to the powder that partial size is 13-30 microns with flour mill, all obtains different-grain diameter using ultrasonic activation sieve screening Powder, sieve mesh number be 160 mesh, 250 mesh, 300 mesh and 350 mesh.
The component of 1 epoxy powder of table
The unit of each component is weight (g) in table 1
Embodiment 2
The bottom powder selects polyester powder, and the component of the polyester powder is as shown in table 3.Wherein, the preparation of polyester powder Method is same as Example 1, and details are not described herein.
The component of 2 polyester powder of table
The unit of each component is weight (g) in table 2
Embodiment 3
The bottom powder selects the component of polyester epoxy powder and the polyester epoxy powder as shown in table 3.Wherein, gather The preparation method of ester epoxy powder is same as Example 1, and details are not described herein.
The component of 3 polyester epoxy powder of table
The unit of each component is weight (g) in table 3
Embodiment 4
The bottom powder selects the component of acrylic clear powder and the acrylic clear powder as shown in table 4.Wherein, acrylic acid The preparation method of powder is same as Example 1, and details are not described herein.
The component of 4 acrylic clear powder of table
The unit of each component is weight (g) in table 4
Embodiment 5
The bottom powder selects the component of polyurethane powder and the polyurethane powder as shown in table 5.Wherein, polyurethane The preparation method of powder is same as Example 1, and details are not described herein.
The component of 5 polyurethane powder of table
The unit of each component is weight (g) in table 5
Embodiment 6
The bottom powder selects the component of FEVE fluororesin powder and the FEVE fluororesin powder as shown in table 6.Its In, the preparation method of FEVE fluororesin powder is same as Example 1, and details are not described herein.
The component of 6 FEVE fluororesin powder of table
The unit of each component is weight (g) in table 6
Embodiment 7
The flour selects the component of polyester flour and the polyester flour as shown in table 7.Powder extruding machine is added to exist It squeezes out, crushes at a temperature of 110-130 degree, sieving obtains the polyester flour of different-grain diameter.
The component of 7 polyester flour of table
The unit of each component is weight (g) in table 7
Embodiment 8
The flour selects the component of polyurethane flour and the polyurethane flour as shown in table 7.Wherein, polyurethane The preparation method of flour is same as Example 7, and details are not described herein.
The component of 8 polyurethane flour of table
The unit of each component is weight (g) in table 8
Embodiment 9
The flour selects the component of PVDF fluorine carbon flour and the PVDF fluorine carbon flour as shown in table 7.Wherein, The preparation method of PVDF fluorine carbon flour is same as Example 7, and details are not described herein.
The component of 9 PVDF fluorine carbon flour of table
The unit of each component is weight (g) in table 9
Embodiment 10
(1) standard jig is made
On the pretreated hot-dip galvanizing sheet steel of phosphatization, the bottom powder for being 30 microns with electrostatic gun spraying partial size is controlled as far as possible The thick thickness of dry film at 25-40 microns of film, baking-curing；Then a level powder, film are sprayed above the coating toasted again again Thickness control forms standard jig at 30-50 microns after solidification, using the apparent flatness and corrosion resistance as detection test coating The reference standard of energy.
(2) test piece is made
The bottom powder of sample 1-72 is sprayed on test piece, it is specific as follows: in the pretreated hot-dip galvanizing sheet steel of phosphatization On, bottom powder is sprayed with electrostatic gun, is sprayed onto uniform thickness as far as possible；Then a part of spray coated bottom is sheltered from one block of steel plate Powder, then spraying flour.After reaching expected thickness, it is put into oven baking-curing.Condition of cure be 200 ° 10 minutes.Take out test After template, the total film thickness of bottom powder and two coatings is measured, it is exactly the substantially thickness of flour, such as table that total film thickness, which subtracts the thickness of bottom powder, It is tested shown in serial number 1-39 in 10.Wherein test serial number 40-42 baking condition be 240 DEG C, 15 minutes, other making steps with It is the same to test serial number 1-39.
(3) the coating detection of test piece
By standard jig and test piece respectively by acid salt spray test to detect its corrosion resistance, such as 10 institute of table Show.The apparent property of template coating observes the film forming and flatness of coating based on visually.Wherein, it will test result to be divided into Four classes: it is bad, generally, preferably, very well.That is, comparable with the corrosion resistance of single coating flour is " bad ", ring can be reached Oxygen bottom powder does primary coat, polyester flour do face painting two apply two roasting coating systems corrosion resistances be " fine "；Between the two Between be " general " and " preferable ".
Conventional powdery paints partial size is 30-50 microns, in this application, if the partial size of bottom powder is reduced to 15-25 Micron, i.e. the half partial size of conventional powders, then the volume of bottom powder particles becomes about 1/6th sizes of original powder volume. The bottom powder of smaller size smaller thick bottom powder compared with crosslinking difference problem of the flour when solidifying is much smaller.Meanwhile by bottom powder Coating layer thickness is reduced to relatively thin thickness, such as less than 15 microns, also can be reduced crosslinking difference problem, and to be reduced to 10 micro- for thickness For rice hereinafter, crosslinking difference problem is just very light, especially superfine powder is just slighter.2-3 microns of bottom powder thickness or more will make The Adhesion enhancement of flour, and thickness gets over improved corrosion performance closer to normal value, the thickness of bottom powder is generally 10-15 microns； But superfine powder just can make corrosion resistance reach normal value at 5 microns of thickness or more.
As shown in table 10, partial size and thickness unit are micron in table 10.It is detected and is applied according to the bottom powder of detection different-thickness Layer (bottom powder and flour) corrosion resistance discovery: (1) with the reduction of bottom powder diameter and thickness, flour adhesive force be will increase；(2) Coating flatness and bottom powder thickness are negatively correlated；(3) with the reduction of bottom powder thickness, coating corrosion resistance can be reduced；(4) bottom powder Using the bottom powder thickness that can reduce corrosion resistance normal value needs when superfine powder.Therefore, the bottom powder thickness of superfine powder is in 5-25 Preferable film forming and corrosion resistance are had in the range of micron, and is the film thickness that can control at 5-10 microns and can obtain To best effect.But since the partial size of bottom powder is smaller, preparation cost is higher, and the thickness of bottom powder is thinner, application techniques requirement Also it can improve, so selecting bottom powder diameter as far as possible is 10-19 microns in the case where meeting preferable film forming and corrosion resistance, and Bottom powder is with a thickness of between 6-15 microns.
The testing result of the acid salt spray test of table 10
Continued 10
Continued 10
In conclusion the coating process of the application is first in substrate surface coating corrosion resistant bottom powder (epoxy powder, polyester powder One or more of end, polyester epoxy powder, acrylic clear powder, polyurethane powder, FEVE fluorine carbon dust) it is used as priming paint, so Coating flour (one or more of polyester flour, polyurethane flour, PVDF fluorine carbon flour) is used as face before bottom powder solidifies afterwards Paint is made finally by priming paint and finishing coat together baking-curing by the absorption of the compatibility and bottom powder and substrate of bottom powder and flour With successfully the two of realization flour apply a curing process；By controlling the partial size and coating layer thickness of bottom powder, the attached of flour coating is improved Put forth effort the corrosion resistance with Bulk coat, is suitable for mass production application, has greatly pushed the industrial applications of flour.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.

Claims (10)

1. a kind of coating process of coiled material powdery paints characterized by comprising
First on substrate one layer of corrosion resistance of coating bottom powder, the then one level powder of coating again on the powder of bottom, finally by bottom powder With flour together baking-curing.
2. coating process according to claim 1, which is characterized in that
The partial size of the bottom powder is 13-30 microns；And the coating layer thickness of the bottom powder is 1-25 microns.
3. coating process according to claim 1, which is characterized in that
The bottom powder and flour are all made of the mode coating of electrostatic powder coating.
4. coating process according to claim 1, which is characterized in that
The bottom powder is epoxy powder, polyester powder, polyester epoxy powder, acrylic clear powder, polyurethane powder, FEVE fluorine carbon dust One or more of end.
5. coating process according to claim 4, which is characterized in that
The epoxy powder includes the substance of following parts by weight: epoxy resin: 300-600 parts；Curing agent: 80-120 parts；Diformazan Base imidazoles: 3-8 parts；Styrax: 2-10 parts；Levelling agent: 5-15 parts；Titanium dioxide: 0-160 parts；Strontium chromate: 0-140 parts；Zinc powder: 0-170 parts；
The polyester powder includes the substance of following parts by weight: polyester resin: 400-550 parts；Curing agent: 30-45 parts；It rests in peace It is fragrant: 0.5-3 parts；Levelling agent: 3-7 parts；Titanium dioxide: 0-160 parts；Strontium chromate: 0-150 parts.
6. coating process according to claim 4, which is characterized in that
The polyester epoxy powder includes the substance of following parts by weight: polyester resin: 400-550 parts；Epoxy resin: 300-350 Part；Styrax: 1.5-2.5 parts；Titanium dioxide: 100-170 parts；Levelling agent: 4-8 parts；Strontium chromate: 0-130 parts；Zinc powder: 30-85 Part；
The acrylic clear powder includes the substance of following parts by weight: acrylic resin: 200-450 parts；Sebacic acid: 8-18 parts；Stream Flat agent: 3-8 parts；Titanium dioxide: 90-110 parts；Styrax: 1-5 parts；Strontium chromate: 0-125 parts.
7. coating process according to claim 4, which is characterized in that
The polyurethane powder includes the substance of following parts by weight: the first hydroxy resin: 120-150 parts；Second of hydroxyl tree Rouge: 250-300 parts；Isocyanate curing agent: 160-200 parts；Styrax: 1-6 parts；Levelling agent: 0.05-0.2 parts；Titanium dioxide: 130-160 parts；Strontium chromate: 50-150 parts；
The FEVE fluororesin powder includes the substance of following parts by weight: FEVE fluorocarbon resin: 400-600 parts；Curing agent: 40- 65 parts；Titanium dioxide: 0-200 parts；Styrax: 2-4 parts；Levelling agent: 3-7 parts；Strontium chromate: 0-150 parts.
8. coating process according to claim 1, which is characterized in that
The flour is one or more of polyester flour, polyurethane flour, PVDF fluorine carbon flour.
9. a kind of coiled material powdery paints characterized by comprising
The bottom powder and flour independently stored；
The bottom powder and flour are adapted to include the object such as the respective components in the described in any item coating process of claim 1-7 Matter；And
The flour is suitable for the substance including the respective components in coating process as claimed in claim 8.
10. a kind of preparation method of coating coiled material characterized by comprising
Coiled material substrate is opened a book；
By coiled material powder coating and their application on the coiled material substrate after opening a book；And
Cooling winding；Wherein
The coiled material is suitable for being painted on the coiled material substrate after opening a book by coating process as described in claim 1 with powdery paints On.
CN201811093553.0A 2018-09-19 2018-09-19 Coiled material powder coating and their application method, powdery paints and coiled material preparation method Pending CN109365239A (en)

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CN110527401A (en) * 2019-09-09 2019-12-03 广州擎天材料科技有限公司 A kind of powdery paints and workpiece
CN110698896A (en) * 2019-10-30 2020-01-17 广州擎天材料科技有限公司 Powder coating and application thereof
CN111187562A (en) * 2020-02-14 2020-05-22 佛山市涂亿装饰材料科技有限公司 FEVE thermosetting layered fluorocarbon powder coating and preparation method thereof
CN112708322A (en) * 2020-12-11 2021-04-27 广东西敦千江粉漆科学研究有限公司 Anti-skid powder coating and preparation method and spraying process thereof
CN113265191A (en) * 2021-05-08 2021-08-17 江苏耀坤液压股份有限公司 Powder spraying process
CN114085596A (en) * 2021-12-31 2022-02-25 山东东宏管业股份有限公司 Fusion bonding epoxy powder coating and application thereof in low-surface treatment of rusty steel pipe
CN114507467A (en) * 2022-01-18 2022-05-17 湘江涂料科技有限公司 Double-coating powder coating combined bag and coating process thereof

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CN110527401A (en) * 2019-09-09 2019-12-03 广州擎天材料科技有限公司 A kind of powdery paints and workpiece
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CN111187562A (en) * 2020-02-14 2020-05-22 佛山市涂亿装饰材料科技有限公司 FEVE thermosetting layered fluorocarbon powder coating and preparation method thereof
CN112708322A (en) * 2020-12-11 2021-04-27 广东西敦千江粉漆科学研究有限公司 Anti-skid powder coating and preparation method and spraying process thereof
CN113265191A (en) * 2021-05-08 2021-08-17 江苏耀坤液压股份有限公司 Powder spraying process
CN114085596A (en) * 2021-12-31 2022-02-25 山东东宏管业股份有限公司 Fusion bonding epoxy powder coating and application thereof in low-surface treatment of rusty steel pipe
CN114507467A (en) * 2022-01-18 2022-05-17 湘江涂料科技有限公司 Double-coating powder coating combined bag and coating process thereof
CN114507467B (en) * 2022-01-18 2023-08-25 湘江涂料科技有限公司 Double-coating powder coating combined bag and coating process thereof

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Application publication date: 20190222