CN113042342A - Low-energy-consumption steel plate color coating process - Google Patents

Low-energy-consumption steel plate color coating process Download PDF

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Publication number
CN113042342A
CN113042342A CN202110300620.7A CN202110300620A CN113042342A CN 113042342 A CN113042342 A CN 113042342A CN 202110300620 A CN202110300620 A CN 202110300620A CN 113042342 A CN113042342 A CN 113042342A
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China
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water
steel plate
coating
coating process
primer
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CN202110300620.7A
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Chinese (zh)
Inventor
冯健
曹会军
朱艳
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Changshu Kehong Material Technology Co ltd
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Changshu Kehong Material Technology Co ltd
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Priority to CN202110300620.7A priority Critical patent/CN113042342A/en
Publication of CN113042342A publication Critical patent/CN113042342A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00Pretreatment 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
    • B05D3/02Pretreatment 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
    • B05D3/0254After-treatment
    • B05D3/0272After-treatment with ovens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50Multilayers
    • B05D7/52Two layers
    • B05D7/54No clear coat specified
    • B05D7/546No clear coat specified each layer being cured, at least partially, separately
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D133/00Coating 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
    • C09D133/04Homopolymers or copolymers of esters
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D161/00Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
    • C09D161/20Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D163/00Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08Anti-corrosive paints
    • C09D5/10Anti-corrosive paints containing metal dust
    • C09D5/106Anti-corrosive paints containing metal dust containing Zn
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00Metallic substrate
    • B05D2202/10Metallic substrate based on Fe
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2502/00Acrylic polymers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2504/00Epoxy polymers

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention discloses a low-energy-consumption steel plate color coating process, which comprises a bottom coating and a surface coating which are formed by roll coating and baking on a steel plate respectively; the raw material of the primary coating adopts water-based primer, and the top coating adopts water-based finish; the water-based primer comprises water-soluble epoxy resin, an amine curing agent, zinc powder and pure water, and has good adhesive force and corrosion resistance; the water-based finish paint comprises water-soluble acrylic resin, amino resin, mica and pure water, and has good weather resistance and boiling resistance; by setting the innovative water-based paint color coating process, the invention not only obviously reduces the energy consumption, but also avoids the consumption of organic solvent on the basis of ensuring the performance of the coating, and has good environmental protection.

Description

Low-energy-consumption steel plate color coating process
Technical Field
The invention relates to the field of steel plate color coating processes, in particular to a low-energy-consumption steel plate color coating process.
Background
The traditional color-coated steel plate is usually formed by coating a solvent-based coating on the surface of a steel plate on a continuous production line of the steel plate and then baking and curing the steel plate in a drying furnace, so that a large amount of organic solvent is consumed, multiple drying procedures are required, and the coating procedure is complicated.
With the enhancement of the environmental protection consciousness of people and the gradual improvement of environmental protection laws and regulations, new green, environmental-friendly, energy-saving and material-saving coating products are encouraged and popularized in various countries in the world at present. Environmental-friendly water-based coatings, powder coatings, high-solid coatings and photo-curing coatings have become the development direction of coating technology. The water-based paint is beneficial to reasonably utilizing resources, preventing environmental pollution and protecting human health, does not contain or contains few VOC (volatile organic compounds) and Harmful Air Pollutants (HAP), and becomes a research and development hotspot, a bright spot for popularization and application and a growth point. The water-based paint can be compatible with the existing roller coating line of the color-coated steel plate, so that the switching can be directly carried out. However, the film-forming property of the water-based paint is hydrophilic, so that the water resistance and the corrosion resistance of the water-based paint are inevitably affected, which also becomes a main technical problem for applying the water-based paint as a coating material of a color coated steel plate.
Therefore, the applicant hopes to seek a technical scheme to solve the above technical problems and realize a low-energy steel plate color coating process.
Disclosure of Invention
In view of the above, the invention aims to provide a low-energy-consumption steel plate color coating process, which not only remarkably reduces energy consumption, but also avoids consumption of organic solvents and has good environmental protection performance on the basis of ensuring coating performance by setting an innovative water-based paint color coating process.
The technical scheme adopted by the invention is as follows:
a low-energy-consumption steel plate color coating process comprises respectively roll coating and baking a formed bottom coating and a formed surface coating on a steel plate; the raw material of the primary coating adopts water-based primer, and the top coating adopts water-based finish paint; the water-based primer comprises water-soluble epoxy resin, an amine curing agent, zinc powder and pure water, and has good adhesive force and corrosion resistance; the water-based finish paint comprises water-soluble acrylic resin, amino resin, mica and pure water, and has good weather resistance and boiling resistance.
Preferably, the thickness of the base coat is in the range of 5-10 microns and the thickness of the top coat is in the range of 15-25 microns.
Preferably, the water-based primer includes 35 to 60 wt% of a water-soluble epoxy resin and 10 to 25 wt% of zinc powder.
Preferably, the water-based finish paint comprises 30-50 wt% of water-soluble acrylic resin, 15-40 wt% of amino resin and 10-30 wt% of mica.
Preferably, the steel sheet is surface-cleaned in advance to remove wax and/or oil and/or dirt on the surface of the steel sheet before being roll-coated with the water-based primer.
Preferably, the steel sheet is a galvanized steel sheet or an aluminum-zinc plated steel sheet; the steel plate base layer is prepared by carrying out surface cleaning, annealing, hot dipping, cooling, finishing, straightening and surface passivation treatment on the steel plate base layer.
Preferably, after finishing the roller coating of the water-based primer, baking and curing are carried out through a primer baking oven; after finishing the roller coating of the water-based finish paint, baking and curing the water-based finish paint through a finish paint baking oven, wherein the baking temperature of each baking oven is set to 200-240, and the baking time is 1-3 minutes.
Preferably, when the roller coating is carried out, the roller coating linear speed of the water-based primer and the water-based finish paint is set to be 30-35 m/min.
It should be noted that the test standard of the coating thickness referred to in the present application is in accordance with GB/T6739-2006.
The application creatively provides that the water-based primer and the water-based finish paint are respectively used as water-based coating materials of the steel plate anticorrosion base coating and the weather-resistant top coating, the water-based primer and the water-based finish paint can replace the existing liquid paint, and the anticorrosion base coating and the weather-resistant top coating can be simultaneously obtained through the conventional roller coating, baking and curing processes, wherein the water-based primer adopts water-soluble epoxy resin and amine curing agent as main raw materials for water-based base coating, has good adhesive force with the steel plate base material, and simultaneously, the zinc powder can realize good base coating anticorrosion effect; the water-based finish paint adopts water-soluble acrylic resin and amino resin as main raw materials for water-based finish paint coating, so that the water-based finish paint has good weather resistance and mica has good boiling resistance; on the basis of ensuring the performance of the coating, the energy consumption is obviously reduced, the consumption of organic solvent is avoided, and the environmental protection property is good.
Detailed Description
The embodiment of the invention discloses a low-energy-consumption steel plate color coating process, which comprises a bottom coating and a surface coating which are formed by roll coating and baking on a steel plate respectively; the raw material of the primary coating adopts water-based primer, and the top coating adopts water-based finish; the water-based primer comprises water-soluble epoxy resin, an amine curing agent, zinc powder and pure water, and has good adhesive force and corrosion resistance; the water-based finish paint comprises water-soluble acrylic resin, amino resin, mica and pure water, and has good weather resistance and boiling resistance; preferably, in the present embodiment, the steel sheet is a galvanized steel sheet or an aluminum-zinc-plated steel sheet; the steel plate base layer is prepared by carrying out surface cleaning, annealing, hot dipping, cooling, finishing, straightening and surface passivation treatment on the steel plate base layer.
Preferably, in this embodiment, the thickness of the base coat is in the range of 5-10 microns and the thickness of the top coat is in the range of 15-25 microns.
Preferably, in the present embodiment, the water-based primer includes 35 to 60 wt% of a water-soluble epoxy resin and 10 to 25 wt% of zinc powder; the water-based finish paint comprises 30-50 wt% of water-soluble acrylic resin, 15-40 wt% of amino resin and 10-30 wt% of mica.
Preferably, in the present embodiment, before the roll coating with the water-based primer, the steel sheet is subjected to surface cleaning in advance to remove wax and/or oil and/or dust on the surface of the steel sheet; after finishing the roller coating of the water-based primer, baking and curing the water-based primer through a primer baking furnace; after finishing the roller coating of the water-based finish paint, baking and curing the water-based finish paint through a finish paint baking oven, wherein the baking temperature of each baking oven is set to 200-240, and the baking time is 1-3 minutes; when the roller coating is carried out, the roller coating linear speed of the water-based primer and the water-based finish paint is set to be 30-35 m/min. Further preferably, in the roll coating construction, the construction viscosity of the water-based primer and the water-based finish paint can be set as follows: 70-90 seconds (2 cups/25 ℃ C.) and 70-90 seconds (4 cups/25 ℃ C.).
It should be noted that the tools and containers using the water-based primer and the water-based finish should be made of materials (such as stainless steel, plastic, etc.) that do not react with water; when the roller coating is applied, the roller coating is strictly forbidden to be mixed with other coatings and organic solvents to prevent deterioration, and a proper amount of water can be added into the water-based primer and the water-based finish paint for dilution, but excessive water is not required. Diluting with water to avoid acid bias, and diluting with small amount of water for several times.
In the practice of the present application, suitable well-known auxiliaries may also be added to the water-borne base coat and the water-borne top coat, respectively, which are conventional technical means for those skilled in the art and will not be described in detail herein.
The embodiment creatively provides that the water-based primer and the water-based finish paint are respectively used as water-based coating materials of the steel plate anticorrosion base coating and the weather-resistant top coating, the water-based primer and the water-based finish paint can replace the existing liquid paint, and the anticorrosion base coating and the weather-resistant top coating can be simultaneously obtained through the conventional roller coating, baking and curing processes, wherein the water-based primer adopts water-soluble epoxy resin and amine curing agent as main raw materials for water-based base coating, has good adhesive force with the steel plate base material, and simultaneously, the zinc powder can realize good anticorrosion effect of the base coating; the water-based finish paint adopts water-soluble acrylic resin and amino resin as main raw materials for water-based finish paint coating, so that the water-based finish paint has good weather resistance and mica has good boiling resistance; on the basis of ensuring the performance of the coating, the energy consumption is obviously reduced, the consumption of organic solvent is avoided, and the environmental protection property is good.
To demonstrate the practical effects of the present embodiment, the present application particularly develops the following specific embodiments:
example 1: the other technical scheme is the same as the above embodiment, wherein the water-based primer in this embodiment comprises 50 wt% of water-soluble epoxy resin, 8 wt% of amine curing agent, 15 wt% of zinc powder and the balance of pure water, and the total is 100 parts by weight;
the water-based finish paint comprises 35 wt% of water-soluble acrylic resin, 35 wt% of amino resin, 15 wt% of mica and the balance of pure water, wherein the total weight is 100 parts.
Example 2: the rest technical scheme is the same as that of the embodiment 1, wherein the water-based primer in the embodiment comprises 35 wt% of water-soluble epoxy resin, 6 wt% of amine curing agent, 25 wt% of zinc powder and the balance of pure water.
Example 3: the rest technical scheme is the same as that of the embodiment 1, wherein the water-based primer in the embodiment comprises 40 wt% of water-soluble epoxy resin, 10 wt% of amine curing agent, 15 wt% of zinc powder and the balance of pure water.
Example 4: the rest technical scheme is the same as that of the embodiment 1, wherein the water-based primer in the embodiment comprises 60 wt% of water-soluble epoxy resin, 10 wt% of amine curing agent, 10 wt% of zinc powder and the balance of pure water.
Example 5: the rest technical scheme is the same as that of the embodiment 1, wherein the water-based finish paint in the embodiment comprises 30 wt% of water-soluble acrylic resin, 20 wt% of amino resin, 25 wt% of mica and the balance of pure water.
Example 6: the rest technical scheme is the same as that of the embodiment 1, wherein the water-based finish paint in the embodiment comprises 40 wt% of water-soluble acrylic resin, 25 wt% of amino resin, 10 wt% of mica and the balance of pure water.
Example 7: the rest technical scheme is the same as that of the embodiment 1, wherein the water-based finish paint in the embodiment comprises 50 wt% of water-soluble acrylic resin, 15 wt% of amino resin, 18 wt% of mica and the balance of pure water.
The examples 1 to 7 were subjected to the performance tests shown in the following Table 1:
TABLE 1 Performance test data for examples 1-7 of this embodiment
Figure BDA0002986105850000061
Figure BDA0002986105850000071
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (9)

1. A low-energy-consumption steel plate color coating process comprises respectively roll coating and baking a formed bottom coating and a formed surface coating on a steel plate; the primer coat is characterized in that the raw material of the primer coat adopts water-based primer, and the top coat adopts water-based finish; the water-based primer comprises water-soluble epoxy resin, an amine curing agent, zinc powder and pure water, and has good adhesive force and corrosion resistance; the water-based finish paint comprises water-soluble acrylic resin, amino resin, mica and pure water, and has good weather resistance and boiling resistance.
2. The low energy consumption steel plate color coating process according to claim 1, wherein the thickness of the primary coating layer is in the range of 5-10 microns.
3. The low energy consumption steel plate color coating process according to claim 1, wherein the thickness of the top coating layer is in the range of 15-25 μm.
4. The low energy consumption steel plate color coating process of claim 1, wherein the water-based primer comprises 35-60 wt% of water-soluble epoxy resin and 10-25 wt% of zinc powder.
5. The low energy consumption steel plate color coating process according to claim 1, wherein the water-based finish paint comprises 30-50 wt% of water-soluble acrylic resin, 15-40 wt% of amino resin and 10-30 wt% of mica.
6. The low energy consumption steel plate color coating process according to claim 1, wherein the steel plate is subjected to surface cleaning in advance to remove wax and/or oil stains and/or dust on the surface of the steel plate before being subjected to roll coating with the water-based primer.
7. The low-energy-consumption steel plate color coating process according to claim 1, wherein the steel plate is a galvanized steel plate or an aluminum-zinc-coated steel plate; the steel plate base layer is prepared by carrying out surface cleaning, annealing, hot dipping, cooling, finishing, straightening and surface passivation treatment on the steel plate base layer.
8. The low-energy-consumption steel plate color coating process according to claim 1, characterized in that after the water-based primer roller coating is finished, baking and curing are carried out through a primer baking oven; after finishing the roller coating of the water-based finish paint, baking and curing the water-based finish paint through a finish paint baking oven, wherein the baking temperature of each baking oven is set to 200-240, and the baking time is 1-3 minutes.
9. The low-energy-consumption steel plate color coating process as claimed in claim 1, wherein the roll coating line speed of the water-based primer and the water-based finish paint is set to 30-35 m/min.
CN202110300620.7A 2021-03-22 2021-03-22 Low-energy-consumption steel plate color coating process Pending CN113042342A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114247621A (en) * 2021-12-10 2022-03-29 惠州深赛尔化工有限公司 Preparation method of high-temperature-resistant and wear-resistant color-coated plate

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105176348A (en) * 2015-09-29 2015-12-23 浙江墙煌建材有限公司 Color metal plate precoated with water-based organic ceramic through roller and manufacturing technology of color metal plate
CN109332136A (en) * 2018-10-30 2019-02-15 黄河三角洲京博化工研究院有限公司 A kind of production method of Coil Coating Products
CN109456675A (en) * 2018-10-31 2019-03-12 湖南航天三丰科工有限公司 A kind of heat-insulated camouflage painting composite coating of watery anti-corrosion

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105176348A (en) * 2015-09-29 2015-12-23 浙江墙煌建材有限公司 Color metal plate precoated with water-based organic ceramic through roller and manufacturing technology of color metal plate
CN109332136A (en) * 2018-10-30 2019-02-15 黄河三角洲京博化工研究院有限公司 A kind of production method of Coil Coating Products
CN109456675A (en) * 2018-10-31 2019-03-12 湖南航天三丰科工有限公司 A kind of heat-insulated camouflage painting composite coating of watery anti-corrosion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114247621A (en) * 2021-12-10 2022-03-29 惠州深赛尔化工有限公司 Preparation method of high-temperature-resistant and wear-resistant color-coated plate

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