CN111995935A - Black ceramic-like high-temperature-resistant powder coating - Google Patents
Black ceramic-like high-temperature-resistant powder coating Download PDFInfo
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- CN111995935A CN111995935A CN202010920441.9A CN202010920441A CN111995935A CN 111995935 A CN111995935 A CN 111995935A CN 202010920441 A CN202010920441 A CN 202010920441A CN 111995935 A CN111995935 A CN 111995935A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
- C09D163/04—Epoxynovolacs
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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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- 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
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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
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a black ceramic-like high-temperature-resistant powder coating which comprises the following components in parts by weight: 35-45 parts of epoxy resin; 10.5-25 parts of a curing agent; 2-10 parts of common epoxy; 0.8-1.2 parts of a leveling agent; 0.3-0.5 part of benzoin; 0.3-1 part of polytetrafluoroethylene micro-powder wax; 0.5-2 parts of adhesion promoter; 0.5-1 part of carbon black; 15-20 parts of precipitated barium; 10-20 parts of silicon filler. The ceramic-like coating can be prepared, and the problems of high cost and easiness in scratching are solved.
Description
Technical Field
The invention relates to the field of powder coatings, in particular to a black ceramic-like high-temperature-resistant powder coating.
Background
The ceramic powder is mainly a sintered material such as an oxide, a carbide, and a nitride having a high melting point. The raw materials are chemical raw materials which are artificially synthesized or refined. The material is prepared by sintering superfine powder (submicron and nanometer micro powder) at ultrahigh temperature and high pressure. The high-temperature-resistant and corrosion-resistant composite material has excellent characteristics of high temperature resistance, wear resistance, corrosion resistance, insulation and the like, and is widely applied in many important fields. However, the ceramic powder has the defects of complex synthesis process, high curing temperature and high energy consumption, so that the ceramic powder cannot be widely applied to common industries such as household appliances, metal furniture and the like. And in some industries such as automobiles, microwave ovens, range hoods and the like, the performances of temperature resistance, wear resistance and corrosion resistance are required, and the cost of using ceramic powder is huge, so that the development of the ceramic-like powder coating with temperature resistance, wear resistance and corrosion resistance has wide market prospect.
Disclosure of Invention
The invention aims to provide a black ceramic-like high-temperature-resistant powder coating to solve the problems of high cost and easy scratching of the existing ceramic coating.
In order to achieve the purpose, the embodiment of the invention adopts the following scheme:
the black ceramic-like high-temperature-resistant powder coating comprises the following raw materials in parts by mass:
in the technical scheme, the product does not contain toxicity, solvent or volatile toxic substances, so that the product has no pollution problems of poisoning, fire hazard, three-waste discharge and the like, and completely meets the requirements of national environmental protection laws. The utilization rate of raw materials is high, the over-sprayed powder produced by powder suppliers with known brands can be recycled, and the highest utilization rate can even reach more than 99%. After the coated object is pretreated, the coating film with enough thickness can be obtained by one-time construction without primary coating, the automatic operation is easy to realize, the production efficiency is high, and the cost can be reduced. The coating is compact, the adhesive force, the impact strength and the toughness are good, the corner coverage rate is high, the chemical corrosion resistance and the electrical insulation performance are excellent, and the powder coating is safe and convenient to store and transport.
Further, the epoxy resin is novolac epoxy.
Furthermore, the benzoin comprises benzoin as a chemical component, and has a melting point of 133-137 ℃.
Further, the melting point of the polytetrafluoroethylene micro powder wax is 320 ℃.
Further, the thickness diameter of the silicon filler is 10 μm.
Further, the mohs hardness of the silicon filler is 7.0.
Further, the curing agent is a mixture of a dicyandiamide curing agent and a phenolic curing agent.
Further, the mass part of the dicyandiamide curing agent is 0.5-5 parts.
Further, the mass part of the phenolic curing agent is 10-20 parts.
The embodiment of the application also adopts another technical scheme that: a preparation method of black ceramic-like high-temperature-resistant powder coating comprises the following steps:
weighing raw materials: weighing corresponding epoxy resin, curing agent, common epoxy, flatting agent, benzoin, polytetrafluoroethylene micro powder wax, adhesion promoter, carbon black, precipitated barium and silicon filler according to the mass parts;
feeding: putting the raw materials into a mixer for mixing;
premixing: uniformly mixing the raw materials up and down by using a Misaike mixer;
melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder;
tabletting: pressing the extruded bottom material into sheets by a tablet press;
crushing: crushing the flaky backing material by using a crusher;
fine crushing: crushing the bottom material by a crusher;
sieving and packaging: screening by a rotary screen to obtain powder coating, and packaging the coating into boxes.
Further, the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing.
Further, the screw rotation of the extruder in the melt extrusion mixing step is 50 HZ.
Further, the melt extrusion mixing step comprises primary extrusion and secondary extrusion.
Further, the primary extrusion temperature was 90 ℃.
Further, the secondary extrusion temperature is 100 ℃.
The invention has the beneficial effects that:
the black ceramic-like high-temperature-resistant powder coating provided by the invention has the advantages that the service life of an object which is easy to scratch is prolonged, the coating is not easy to scratch, the integrity and the appearance are kept, the protective performance is more durable, the hardness of the coated pencil can reach 6H to the maximum, a scratch resistance test Newton's pen can pass 5N, the gloss retention rate is more than 50% after being baked in an oven at 260 ℃ for 2 hours in the aspect of high temperature resistance, and the coating is intact, cannot peel off and cannot fall off. Good adhesion can be ensured after boiling for 1 hour. At present, high-hardness powder in the market is almost all low in gloss and the gloss is not more than 60 degrees, the project has the ultrahigh-hardness scratch-resistant performance, the gloss can reach more than 80 degrees, the project can be applied to almost all industries, the market prospect is very wide, and the economic value is huge.
Detailed Description
It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments and not restrictive of the current invention, and that all other embodiments obtained by those skilled in the art without undue experimentation will fall within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", etc. indicate orientations or positional relationships only for the convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. But it is obvious. To one of ordinary skill in the art, the embodiments may be practiced without limitation to these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.
The application provides a black ceramic-like high-temperature-resistant powder coating which is prepared from the following raw materials in parts by mass: 35-45 parts of epoxy resin; 10.5-25 parts of a curing agent; 2-10 parts of common epoxy; 0.8-1.2 parts of a leveling agent; 0.3-0.5 part of benzoin; 0.3-1 part of polytetrafluoroethylene micro-powder wax; 0.5-2 parts of adhesion promoter; 0.5-1 part of carbon black; 15-20 parts of precipitated barium; 10-20 parts of silicon filler. The epoxy resin is phenolic epoxy; the benzoin comprises the chemical components of benzoin, and has a melting point of 133-137 ℃; the melting point of the polytetrafluoroethylene micro powder wax is 320 ℃; the thickness diameter of the silicon filler is 10 mu m; the Mohs hardness of the silicon filler is 7.0; the curing agent is a mixture of dicyandiamide curing agent and phenol curing agent; the dicyandiamide curing agent accounts for 0.5-5 parts by mass; the mass portion of the phenolic curing agent is 10-20. The test data are as follows:
| common powder | High hardness powder | |
| Scraping tool | Has trace | Scratch-resistant test Newton's pen 5N without obvious trace |
| Hardness of | 6H film cracking | 6H coating film is not scratched |
| Impact of | 50kg.cm (positive) | 30kg. cm (positive) |
| Temperature resistant | 260 degree x 2hr | 260 degree x 2hr |
| The light-retaining rate is less than 50 percent | The light-retaining rate is more than 50 percent |
The epoxy value of the phenolic epoxy reaches more than 0.5eq/100g, 2.5 times of crosslinking points can be provided during curing, and a three-dimensional structure with high crosslinking density can be easily formed; the molecular structure of the epoxy resin has polar groups such as epoxy end groups, hydroxyl groups, ether bonds and the like, and the existence of the groups enables the epoxy resin molecules and adjacent interfaces to generate electromagnetic adsorption or chemical bonds, so that the adhesive force is improved, and the adhesive force of the coating can be improved; the phenolic resin contains a large amount of phenolic hydroxyl, and reacts with epoxy under the heating condition; benzoin can help the defoaming of the coating film and is a defoaming agent for the effective coating film; the polytetrafluoroethylene micro powder wax can improve the hardness of the surface of the coating film; carbon black can improve the hiding properties of the coating film.
The present application will be described in further detail with reference to examples, but the present application is not limited to these examples.
[ example 1 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 10 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 2 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 12 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 3 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 14 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 4 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 5 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 18 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 6 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 20 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
Comparative example 1
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 9 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
Comparative example 2
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 21 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 7 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.4 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 8 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 9 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.6 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 10 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.7 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 11 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.8 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 12 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.9 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
Comparative example 3
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.2 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
Comparative example 4
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 1.1 parts by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 13 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 0.8 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 14 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 0.9 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 15 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 16 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1.1 parts by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
[ example 17 ]
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1.2 parts by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
Comparative example 5
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 0.6 part by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
Comparative example 6
Weighing 40 parts by weight of epoxy resin, 16 parts by weight of curing agent, 5 parts by weight of common epoxy, 1.4 parts by weight of flatting agent, 0.4 part by weight of benzoin, 0.5 part by weight of polytetrafluoroethylene micro-powder wax, 2 parts by weight of adhesion promoter, 0.8 part by weight of carbon black, 18 parts by weight of precipitated barium and 16 parts by weight of silicon filler; premixing: uniformly mixing the raw materials up and down by using a Misaike mixer; melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder; tabletting: pressing the extruded bottom material into sheets by a tablet press; crushing: crushing the flaky backing material by using a crusher; fine crushing: crushing the bottom material by a crusher; the premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing; the rotation degree of a screw of the extruder in the step of melt extrusion mixing is 50 HZ; the melt extrusion mixing step comprises primary extrusion and secondary extrusion; the primary extrusion temperature is 90 ℃; the secondary extrusion temperature was 100 ℃.
The compounding ratios of the raw materials in examples 1 to 6 and comparative examples 1 to 2 are summarized in Table 1.
TABLE 1
The evaluation results of examples 1 to 6 and comparative examples 1 to 2 are summarized in Table 2.
TABLE 2
As can be seen from tables 1-2, with the increase of the silicon filler, the scratch resistance is obviously improved from slight scratches to no obvious scratches, the preferred range of the silicon filler is 10-20 parts by mass, the light retention rate of the powder coating in the range is attenuated from high to low, the performances are combined, when the optimal part of the silicon filler is 16 parts, the scratch resistance is preferably 6H, no obvious scratches exist, the light retention rate can reach 60%, and all performance parameters of the obtained powder coating reach optimal values.
The following table summarizes the raw material ratios of examples 7 to 12 and comparative examples 3 to 4 in table 3.
TABLE 3
The evaluation results of examples 7 to 12 and comparative examples 3 to 4 are summarized in Table 4.
TABLE 4
As can be seen from tables 3-4, with the increase of the polytetrafluoroethylene micro-powder wax, the scratch resistance is obviously improved from slight scratches to no obvious scratches, the preferable range of the polytetrafluoroethylene micro-powder wax is 0.3-1 by mass, the light retention rate of the powder coating in the range is attenuated from high to low, and the performances are comprehensively obtained, when the optimal part of the polytetrafluoroethylene micro-powder wax is 0.5, the scratch resistance is preferably 6H, no obvious scratches exist, the light retention rate can reach 60%, and all performance parameters of the obtained powder coating reach optimal values.
The compounding ratios of the raw materials in examples 13 to 17 and comparative examples 5 to 6 are summarized in Table 5.
TABLE 5
The evaluation results of examples 13 to 17 and comparative examples 5 to 6 are summarized in Table 6.
TABLE 6
As can be seen from tables 1-2, with the increase of the leveling agent, the scratch resistance is obviously improved from slight scratches to no obvious scratches, the preferred range of the leveling agent is 0.8-1.2 by mass, the gloss retention of the powder coating within the range is gradually increased and gradually attenuated, the performances are integrated, when the optimal part of the leveling agent is 1, the scratch resistance is preferably 6H, no obvious scratches exist, the gloss retention can reach 60%, and all performance parameters of the obtained powder coating reach optimal values.
Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.
Claims (10)
1. The black ceramic-like high-temperature-resistant powder coating comprises the following raw materials in parts by mass:
2. the black ceramic-like high-temperature-resistant powder coating as claimed in claim 1, wherein the epoxy resin is novolac epoxy.
3. The black ceramic-imitated high-temperature-resistant powder coating as claimed in claim 1, wherein the benzoin comprises benzoin and has a melting point of 133-137 ℃.
4. The black ceramic-like high-temperature-resistant powder coating as claimed in claim 1, wherein the melting point of the polytetrafluoroethylene micro wax is 320 ℃.
5. The black ceramic-like high temperature resistant powder coating of claim 1, wherein the silicon filler has a thickness diameter of 10 μm.
6. The black ceramic-like high temperature resistant powder coating of claim 1, wherein the Mohs hardness of the silicon filler is 7.0.
7. The black ceramic-like high-temperature-resistant powder coating as claimed in claim 1, wherein the curing agent is a mixture of dicyandiamide curing agent and phenolic curing agent.
8. The black ceramic-like high-temperature-resistant powder coating as claimed in claim 7, wherein the dicyandiamide curing agent is 0.5-5 parts by mass.
9. The black ceramic-like high-temperature-resistant powder coating as claimed in claim 1, wherein the phenolic curing agent is 10-20 parts by mass.
10. A preparation method of black ceramic-like high-temperature-resistant powder coating comprises the following steps:
weighing raw materials: weighing corresponding epoxy resin, curing agent, common epoxy, flatting agent, benzoin, polytetrafluoroethylene micro powder wax, adhesion promoter, carbon black, precipitated barium and silicon filler according to the mass parts;
feeding: putting the raw materials into a mixer for mixing;
premixing: uniformly mixing the raw materials up and down by using a Misaike mixer;
melt extrusion mixing: melting and mixing the raw materials and extruding the mixture by an extruder;
tabletting: pressing the extruded bottom material into sheets by a tablet press;
crushing: crushing the flaky backing material by using a crusher;
fine crushing: crushing the bottom material by a crusher;
sieving and packaging: screening by a rotary screen to obtain powder coating, and packaging the coating into boxes.
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| CN116004121A (en) * | 2022-12-09 | 2023-04-25 | 江南载福粉末涂料（张家港）有限公司 | High-viscosity powder coating and preparation method and application thereof |
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