CN108531009B - Stain-resistant hydrophobic insulating powder coating for valve plate and preparation method thereof - Google Patents
Stain-resistant hydrophobic insulating powder coating for valve plate and preparation method thereof Download PDFInfo
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- CN108531009B CN108531009B CN201810262738.3A CN201810262738A CN108531009B CN 108531009 B CN108531009 B CN 108531009B CN 201810262738 A CN201810262738 A CN 201810262738A CN 108531009 B CN108531009 B CN 108531009B
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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
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1668—Vinyl-type polymers
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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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
- C09D5/24—Electrically-conducting paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K2003/026—Phosphorus
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
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Abstract
The invention discloses a stain-resistant hydrophobic insulating powder coating for an active door plate and a preparation method thereof, wherein the raw materials comprise the following components in parts by weight: 30-60 parts of fluorocarbon resin A, 20-30 parts of epoxy resin B, and curing agent: 4-10 parts of a compatilizer: 3-5 parts of filler, 30-50 parts of flame retardant, 15-30 parts of pigment and 2-6 parts of auxiliary agent, wherein the curing agent is methyl siloxane and phenolic hydroxyl resin, the stain-resistant hydrophobic insulating powder has a two-component curing system, integrates the high adhesive force of epoxy resin and the stain-resistant hydrophobic property of fluorocarbon resin, is applied to coating of a high-voltage electric cabinet valve plate, ensures high insulation, is attractive and free of cleaning, and can be ensured to be new for a long time.
Description
Technical Field
The invention relates to a stain-resistant hydrophobic insulating powder coating for a valve plate and a preparation method thereof, belonging to the field of functional coatings.
Background
The valve plate for the high-voltage electric cabinet is always made of plastic, the service life is short, the requirement on the plastic is high, the cost is high, in recent years, an iron-aluminum material is used as a base material, insulation coating is additionally arranged, the cost is greatly reduced, the application on the high-voltage electric cabinet has extremely high requirements on insulation and service life, the service life of the coating can be shortened by dust on the coating, and high-voltage electric arc breakdown can be caused, so that the coating is required to have high insulation performance and keep clean for a long time, and therefore, the insulating powder coating with good insulation performance, high weather resistance, a self-cleaning function and long service life is very necessary to prepare.
Disclosure of Invention
The purpose of the invention is: the stain-resistant hydrophobic insulating powder coating for the valve plate has the advantages of high mechanical property, excellent hydrophobicity, acid and alkali resistance, chemical reagents, ultrahigh weather resistance and self-cleaning function, and the service life of the powder coating is over 30 years. Fundamentally has solved the life cycle of valve plate coating for the high-tension electricity cabinet, can keep clean and tidy for a long time in the outward appearance, need not extra clearance. The invention also aims to provide a preparation method of the stain-resistant hydrophobic insulating powder coating for the valve plate.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the stain-resistant hydrophobic insulating powder coating for the valve plate comprises the following components in parts by weight:
30-60 parts of fluorocarbon resin
20-30 parts of epoxy resin
4-10 parts of curing agent
3-5 parts of compatilizer
30-50 parts of filler
15-30 parts of flame retardant
1-5 parts of pigment
And 2-6 parts of an auxiliary agent.
Preferably, the fluorine content of the fluorocarbon resin is greater than 50%, and the melting point range is 160-170 ℃.
Preferably, the epoxy resin is selected from the epoxy equivalent range of 1500-1800g/eg and the softening point range of 120-130 ℃.
Preferably, the curing agent is selected from methyl siloxane and phenolic hydroxyl resin, wherein the hydroxyl value of the phenolic hydroxyl resin is within the range of 320-500 g/eg.
Preferably, the curing agent is methyl siloxane and phenolic hydroxyl resin, wherein the fluorocarbon resin and the methyl siloxane form a system with the mass ratio of 5:1, the epoxy resin and the phenolic hydroxyl resin form a system with the mass ratio of 7:1, and the two systems are combined by virtue of the compatilizer and the whole crosslinking.
Preferably, the compatilizer is maleic anhydride grafted fluorocarbon resin, and the grafting rate is more than 1.7%.
Preferably, the filler is precipitated barium sulfate, and the mesh number is about 1000 meshes.
Preferably, the flame retardant is ammonium polyphosphate coated by epoxy resin, and the particle size is 2-5 mu m.
Preferably, the pigment is permanent red, permanent yellow, phthalocyanine blue, phthalocyanine green, titanium dioxide or high-pigment carbon black with high-temperature oxidation resistance, oil resistance and solvent resistance.
Preferably, the auxiliary agent is red phosphorus, a brightening agent, a leveling agent and a defoaming agent.
Preferably, the red phosphorus is coated by microcapsules, and the particle size range is as follows: 800-1000 meshes.
A preparation method of stain-resistant hydrophobic insulating powder coating for a valve plate comprises the following steps:
(1) weighing corresponding parts by weight of precipitated barium sulfate and epoxy resin-coated ammonium polyphosphate, putting the weighed parts into a high-speed stirrer, stirring for 10min at a speed of 800-900 r/min, adding red phosphorus, a brightening agent, a leveling agent and a defoaming agent, and stirring for 5min at a speed of 1000-1200 r/min;
(2) weighing fluorocarbon resin, epoxy resin, a curing agent and pigment in corresponding parts by weight, adding the weighed fluorocarbon resin, epoxy resin, curing agent and pigment into a high-speed stirrer, and stirring for 10min at a speed of 800-900 r/min to uniformly mix resin particles;
(3) feeding the mixture obtained in the steps (1) and (2) through A, B feeding bins respectively, carrying out double-screw melt extrusion, wherein the temperature of a melting section is 100-;
(4) and extruding the melt extrusion mixture into sheets by a cold roller, cooling, crushing into small pieces, grinding into powder by an air mill, then passing through a cyclone separator and a screen to obtain 120-mesh powder, and finally removing impurities by magnetic separation to obtain finished product powder.
The technical scheme adopted by the invention has the beneficial effects that:
the stain-resistant hydrophobic insulating powder coating for the valve plate, which is disclosed by the invention, has the characteristics of stain resistance, hydrophobicity, chemical corrosion resistance and high weather resistance, and not only brings breakthrough development for materials of the valve plate of a high-voltage electric cabinet, but also can be listed as a preferred coating material for outdoor use, the high insulativity of the powder brings good news for the high-voltage field, the powder integrates the characteristics of outdoor powder and insulating powder, the defects of the outdoor powder and the insulating powder are optimized, and the application field of the powder coating is greatly widened; in addition, the pollution-resistant hydrophobic insulating powder has the advantages of simple and easily-obtained raw materials, low cost, simple preparation process and wide application market.
Detailed Description
For a further understanding of the present invention, reference will now be made to specific examples, which are not intended to be limiting.
Example 1
The stain-resistant hydrophobic insulating powder coating for the valve plate comprises the following raw materials:
30 parts of fluorocarbon resin (FK-2 of Shanghai Flukang), 20 parts of epoxy resin (GeSR 907), 6 parts of curing agent methyl siloxane (imported and sold in markets), 2.9 parts of phenolic hydroxyl resin 610 (homemade and sold in markets), 3 parts of compatilizer (imported and sold in markets), 30 parts of precipitated barium sulfate (1000 meshes), 15 parts of ammonium polyphosphate (Jieli Si Hangzhou), 1 part of pigment (phthalocyanine blue and high-color carbon black according to actual color adjustment proportion), 1 part of auxiliary agent (titanium dioxide brightener, flatting agent and defoamer) according to 1 thousandth of the total amount, and 1.5% of the total amount of red phosphorus (Ruibo, coating red phosphorus 800-1000 meshes), wherein the parts are parts by weight.
The fluorine content of the fluorocarbon resin is more than 50 percent, and the melting point range is 160-170 ℃.
The epoxy equivalent weight range of the epoxy resin is 1500-1800g/eg, and the softening point range is 120-130 ℃.
The preparation method of the stain-resistant hydrophobic insulating powder coating for the valve plate comprises the following steps of:
① putting the precipitated barium sulfate and the epoxy-coated ammonium polyphosphate in corresponding parts by weight into a high-speed stirrer, stirring for 10min at 800-900 r/min, adding red phosphorus, a brightening agent, a leveling agent and a defoaming agent, and stirring for 5min at 1000-1200 r/min;
②, weighing fluorocarbon resin, epoxy resin, curing agent and pigment in corresponding parts by weight, adding the weighed materials into a high-speed stirrer, and stirring for 10min at a speed of 800-900 r/min to uniformly mix resin particles;
③, respectively feeding the mixture obtained in the steps ① and ② through a feeding bin A, B, carrying out double-screw melt extrusion, wherein the temperature of a melting section is 100-120 ℃, and the temperature of a head extrusion is 140-150 ℃;
④ the melt extrusion mixture is pressed into pieces by a cold roller, the pieces are crushed into small pieces after cooling, the small pieces are crushed into powder by an air mill, then the powder with 120 meshes is obtained by a cyclone separator and a screen, finally the impurities are removed by magnetic separation to obtain the finished product powder, and the indexes are listed in table 1 after testing.
Example 2
The method is the same as the step of example 1, except that the raw materials comprise, by weight, 40 parts of fluorocarbon resin (FK-2 of shanghai fluokang), 25 parts of epoxy resin (south asia, GESR 907), 8 parts of curing agent methyl siloxane (imported and sold as a market), 3.5 parts of phenolic hydroxyl resin 610 (homemade and sold as a market), 4 parts of compatilizer (imported and sold as a market), 40 parts of precipitated barium sulfate (1000 meshes), 20 parts of ammonium polyphosphate (scherrer si), 2 parts of pigments (phthalocyanine blue, high-color carbon black and titanium dioxide according to actual color adjustment proportion), 1% of auxiliary agents (brightener, leveling agent and defoamer) and 1.5% of the total amount of red phosphorus (rypeng, coated red phosphorus 800-1000 meshes).
The fluorine content of the fluorocarbon resin is more than 50 percent, and the melting point range is 160-170 ℃.
The epoxy equivalent weight range of the epoxy resin is 1500-1800g/eg, and the softening point range is 120-130 ℃.
The preparation method in example 2 is the same as in example 1.
After testing, the indexes are listed in Table 1.
Example 3
The method is the same as the step of example 1, except that the raw materials comprise, by weight, 50 parts of fluorocarbon resin (FK-2 of shanghai fluokang), 30 parts of epoxy resin (south asia, GESR 907), 10 parts of curing agent methyl siloxane (imported and sold as a market), 4.3 parts of phenolic hydroxyl resin 610 (homemade and sold as a market), 4 parts of compatilizer (imported and sold as a market), 50 parts of precipitated barium sulfate (1000 meshes), 20 parts of ammonium polyphosphate (scherrer si), 3 parts of pigments (phthalocyanine blue, high-color carbon black and titanium dioxide according to actual color adjustment proportion), 1% of auxiliary agents (brightener, leveling agent and defoamer) and 1.5% of the total amount of red phosphorus (rypeng, coated red phosphorus 800-1000 meshes).
The fluorine content of the fluorocarbon resin is more than 50 percent, and the melting point range is 160-170 ℃.
The epoxy equivalent weight range of the epoxy resin is 1500-1800g/eg, and the softening point range is 120-130 ℃.
The preparation method in example 3 is the same as in example 1.
After testing, the indexes are listed in Table 1.
Example 4
The method is the same as the step of example 1, except that the raw materials comprise, by weight, 60 parts of fluorocarbon resin (FK-2 of shanghai fluokang), 30 parts of epoxy resin (south asia, GESR 907), 12 parts of curing agent methyl siloxane (imported and sold as a market), 4.3 parts of phenolic hydroxyl resin 610 (homemade and sold as a market), 5 parts of compatilizer (imported and sold as a market), 30 parts of precipitated barium sulfate (1000 meshes), 20 parts of ammonium polyphosphate (scherrer si), 4 parts of pigments (phthalocyanine blue, high-color carbon black and titanium dioxide according to actual color adjustment proportion), 1% of auxiliary agents (brightener, leveling agent and defoamer) and 1.5% of the total amount of red phosphorus (rypeng, coated red phosphorus 800-1000 meshes).
The fluorine content of the fluorocarbon resin is more than 50 percent, and the melting point range is 160-170 ℃.
The epoxy equivalent weight range of the epoxy resin is 1500-1800g/eg, and the softening point range is 120-130 ℃.
The preparation method in example 4 is the same as in example 1.
After testing, the indexes are listed in Table 1.
Example 5
The method is the same as the step of example 1, except that the raw materials comprise, by weight, 60 parts of fluorocarbon resin (FK-2 of shanghai fluokang), 20 parts of epoxy resin (south asia, GESR 907), 12 parts of curing agent methyl siloxane (imported and sold as a market), 2.9 parts of phenolic hydroxyl resin 610 (homemade and sold as a market), 5 parts of compatilizer (imported and sold as a market), 40 parts of precipitated barium sulfate (1000 meshes), 30 parts of ammonium polyphosphate (scherrer si), 3 parts of pigments (phthalocyanine blue, high-color carbon black and titanium dioxide according to actual color adjustment proportion), 1% of auxiliary agents (brightener, leveling agent and defoamer) and 1.5% of the total amount of red phosphorus (rypeng, coated red phosphorus 800-1000 meshes).
The fluorine content of the fluorocarbon resin is more than 50 percent, and the melting point range is 160-170 ℃.
The epoxy equivalent weight range of the epoxy resin is 1500-1800g/eg, and the softening point range is 120-130 ℃.
The preparation method in example 5 is the same as in example 1.
After testing, the indexes are listed in Table 1.
Example 6
The method is the same as the step of example 1, except that the raw materials comprise, by weight, 60 parts of fluorocarbon resin (FK-2 of shanghai fluokang), 30 parts of epoxy resin (south asia, GESR 907), 12 parts of curing agent methyl siloxane (imported and sold as a market), 4.3 parts of phenolic hydroxyl resin 610 (homemade and sold as a market), 5 parts of compatilizer (imported and sold as a market), 50 parts of precipitated barium sulfate (1000 meshes), 30 parts of ammonium polyphosphate (scherrer si), 5 parts of pigments (phthalocyanine blue, high-color carbon black and titanium dioxide according to actual color adjustment proportion), 1% of auxiliary agents (brightener, leveling agent and defoamer) and 1.5% of total amount of red phosphorus (rypeng, coated red phosphorus 800-1000 meshes).
The fluorine content of the fluorocarbon resin is more than 50 percent, and the melting point range is 160-170 ℃.
The epoxy equivalent weight range of the epoxy resin is 1500-1800g/eg, and the softening point range is 120-130 ℃.
The preparation method in example 6 is the same as in example 1.
After testing, the indexes are listed in Table 1.
TABLE 1
The hydroxyl value range of the phenolic hydroxyl resin in the invention is 320-500g/eg, for example: 330 g/eg, 340 g/eg … 490g/eg, 500g/eg all fall within the scope of the present invention.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The utility model provides a valve board is with resistant dirty hydrophobic insulating powder coating which characterized in that: the composition comprises the following components in parts by weight:
30-60 parts of fluorocarbon resin
20-30 parts of epoxy resin
4-10 parts of curing agent
3-5 parts of compatilizer
30-50 parts of filler
15-30 parts of flame retardant
1-5 parts of pigment
2-6 parts of an auxiliary agent;
the curing agent is methyl siloxane and phenolic hydroxyl resin, the compatilizer is maleic anhydride grafted fluorocarbon resin, and the grafting rate is more than 1.7%;
the filler is precipitated barium sulfate, and the mesh number is 1000 meshes; the flame retardant is ammonium polyphosphate coated by epoxy resin, and the particle size is 2-5 mu m; the pigment is permanent red, permanent yellow, phthalocyanine blue, phthalocyanine green, titanium pigment or high-pigment carbon black which resists high-temperature oxidation, oil and solvent;
the auxiliary agent comprises red phosphorus, a brightening agent, a flatting agent and a defoaming agent, wherein the red phosphorus is coated by microcapsules, and the particle size range is as follows: 800-1000 meshes.
2. The stain-resistant hydrophobic insulating powder coating for the valve plate as claimed in claim 1, wherein: the fluorine content in the fluorocarbon resin is more than 50 percent, and the melting point range is 160-170 ℃.
3. The stain-resistant hydrophobic insulating powder coating for the valve plate as claimed in claim 1, wherein: the epoxy equivalent weight range of the epoxy resin is 1500-1800g/eg, and the softening point range is 120-130 ℃.
4. The stain-resistant hydrophobic insulating powder coating for the valve plate as claimed in claim 1, wherein: the hydroxyl value of the phenolic hydroxyl resin is in the range of 320-500 g/eg.
5. A process for preparing a stain resistant hydrophobic insulating powder coating for a valve plate according to any of claims 1 to 4, characterized in that: the method comprises the following steps of:
(1) weighing corresponding parts by weight of precipitated barium sulfate and epoxy resin-coated ammonium polyphosphate, putting the weighed parts into a high-speed stirrer, stirring for 10min at a speed of 800-900 r/min, adding red phosphorus, a brightening agent, a leveling agent and a defoaming agent, and stirring for 5min at a speed of 1000-1200 r/min;
(2) weighing fluorocarbon resin, epoxy resin, a curing agent and pigment in corresponding parts by weight, adding the weighed fluorocarbon resin, epoxy resin, curing agent and pigment into a high-speed stirrer, and stirring for 10min at a speed of 800-900 r/min to uniformly mix resin particles;
(3) feeding the mixture obtained in the steps (1) and (2) through A, B feeding bins respectively, carrying out double-screw melt extrusion, wherein the temperature of a melting section is 100-;
(4) and extruding the melt extrusion mixture into sheets by a cold roller, cooling, crushing into small pieces, grinding into powder by an air mill, then passing through a cyclone separator and a screen to obtain 120-mesh powder, and finally removing impurities by magnetic separation to obtain finished product powder.
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| CN111100511A (en) * | 2019-12-28 | 2020-05-05 | 江阴市玲珑高分子材料有限公司 | Super-weather-resistant curtain wall coating without affecting gluing |
| CN111777915A (en) * | 2020-08-04 | 2020-10-16 | 湖南连心科技有限公司 | Antistatic powder coating and preparation method thereof |
| CN116355467A (en) * | 2023-04-20 | 2023-06-30 | 河北奥磊防腐设备有限公司 | High-temperature-resistant fluorine modified resin coating and preparation method thereof |
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| JPH064785B2 (en) * | 1982-06-04 | 1994-01-19 | 大日本インキ化学工業株式会社 | Resin composition for powder coating |
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| CN103146289A (en) * | 2013-03-29 | 2013-06-12 | 宁波南海化学有限公司 | Powder coating with performances of self-cleaning, heavy corrosion protection and super weather resistance and preparation method and application thereof |
| CN103173073A (en) * | 2013-03-29 | 2013-06-26 | 宁波南海化学有限公司 | Heavy anticorrosion super weatherproof powder coating as well as preparation method and application thereof |
| CN105623414A (en) * | 2014-11-03 | 2016-06-01 | 中泰致远(天津)涂料有限公司 | Environment friendly thermosetting powder coating material |
| CN107502144A (en) * | 2017-09-24 | 2017-12-22 | 嘉兴御创电力科技有限公司 | A kind of anti-corrosion epoxy powder coating and preparation method thereof |
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