CN112724801A - Matte powder coating for wheel hub and preparation method thereof - Google Patents
Matte powder coating for wheel hub and preparation method thereof Download PDFInfo
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- CN112724801A CN112724801A CN202011592869.1A CN202011592869A CN112724801A CN 112724801 A CN112724801 A CN 112724801A CN 202011592869 A CN202011592869 A CN 202011592869A CN 112724801 A CN112724801 A CN 112724801A
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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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
-
- 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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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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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
Abstract
The invention discloses a matte powder coating for a wheel hub, and relates to the field of powder coatings. In the application, the matte powder coating for the wheel hub comprises the following components in parts by weight: 36-42 parts of polyester resin; 5-6 parts of a curing agent; 0.8-1.2 parts of a leveling agent; 4-5 parts of a flatting agent; 0.3-0.8 part of benzoin; 0.3-0.8 part of degassing agent; 0.3-0.8 part of wax powder; 0.8-12 parts of pigment; and 30-35 parts of a filler. The application is used for solving the problems that the matte powder coating cannot keep good adhesive force after being sprayed on the surface of the hub, and a coating layer is easy to damage.
Description
Technical Field
The invention relates to the field of powder coatings, in particular to a matte powder coating for a wheel hub and a preparation method thereof.
Background
The powder coating is gradually and rapidly developed in the automobile part industry due to good environmental protection performance and excellent corrosion resistance, and particularly widely applied to automobile aluminum hubs.
Generally, after the conventional matte powder coating is sprayed, a layer of colored paint or varnish is sprayed on the surface of the conventional matte powder coating to prevent the surface of the coating from being scratched, the production process is relatively complicated, the time is relatively long, and the energy consumption is relatively high in practical application; in addition, the brittleness of the aluminum hub is increased due to too much baking of the hub, and the aluminum hub of the automobile is required to have enough mechanical strength and enough toughness to ensure the impact resistance as a main bearing part of the automobile. Although the toughness of the aluminum hub can be increased by reducing the baking times, the production energy consumption of an enterprise is reduced, and the purposes of energy conservation and environmental protection are achieved, the powder coating cannot be completely attached to the surface of the hub.
At present, a single base powder coating product exists and is used, but mainly high-gloss base powder is used, and a layer of varnish or transparent powder needs to be sprayed on the surface of a certain matte product to protect the coating from scratch, so that the production process is increased, and the cost is increased.
Disclosure of Invention
The invention aims to provide a matte powder coating for a wheel hub, which is used for solving the problems that the powder coating in the prior art cannot keep good adhesive force after being sprayed on the surface of the wheel hub, and a coating layer is easy to damage.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions: a matte powder coating for hubs comprises the following components in parts by weight:
in the technical scheme, under the combined action of the polyester resin, the flatting agent, the wax powder and the filler, the matte powder coating is sprayed on the surface of the hub, so that the surface of the hub has better surface scratch resistance, the produced powder coating has good spraying workability, the surface gloss is good after spraying, and the surface decoration and aesthetic feeling of a sprayed product are greatly improved. The coating is compact, and has good adhesion, impact strength and toughness, high corner coverage rate, excellent chemical medicine bottle corrosion resistance and excellent electric insulation performance.
Further, according to the embodiment of the present application, wherein the leveling agent is an acrylic acid homopolymer.
Further in accordance with an embodiment of the present application, wherein the matting agent is a carboxy acrylic acid.
Further, according to the embodiment of the application, the benzoin is benzoin, and the melting point of the benzoin is 133-137 ℃.
Further, according to the embodiment of the present application, wherein the melting point of the wax powder is 140 ℃.
Further, according to the examples of the present application, wherein the pigment is carbon black.
Further, according to the embodiment of the present application, wherein the filler is barium sulfate.
In addition, another technical scheme is adopted in the embodiment of the application: a hub is made of the matte powder coating for the hub.
Secondly, the embodiment of the application also adopts another technical scheme that: a vehicle comprises the wheel hub.
Finally, the embodiment of the application also adopts another technical scheme that: a preparation method of a matte powder coating for a wheel hub comprises the following steps:
weighing raw materials: weighing corresponding polyester resin, curing agent, flatting agent, benzoin, degassing agent, wax powder, pigment and filler according to the weight 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, according to the embodiment of the present application, the premixing step is performed by high-speed mixing and side shear crushing simultaneously.
Further, according to the examples of the present application, wherein the screw rotation of the extruder in the melt extrusion mixing step is 40 HZ.
Further, according to the embodiment of the application, the temperature of the melt extrusion mixing is controlled to be 70-80 ℃, and the temperature of the discharge port of the extruder is not higher than 140 ℃.
Further, according to the embodiment of the present application, wherein the particle size after the fine pulverization is controlled by adjusting the host and classifying.
Further, according to the embodiment of the application, the premixing time is 10-25 min.
Compared with the prior art, the method has the following technical effects: when the powder coating is sprayed on the surface of the hub, a layer of varnish or transparent powder does not need to be sprayed on the surface of a coated object to protect the powder coating, the production process is reduced, the cost is reduced, and the product does not contain toxicity, solvents and volatile toxic substances, so that the risk of poisoning of personnel is avoided. The raw material utilization rate of the powder falling in the partial production process is high, and the utilization rate can reach more than 99%. The powder coating has the advantages of compact coating, good adhesive force, good impact strength and toughness, high corner coverage rate, and excellent chemical corrosion resistance and electrical insulation performance.
Detailed Description
In order to make the objects and technical solutions of the present invention clear and fully described, and advantages thereof more clear, embodiments of the present invention are described in further detail below. It should be understood that the specific embodiments described herein are illustrative of only some embodiments of the invention and are not limiting of the invention, as those skilled in the art will recognize that other embodiments may be made without the use of inventive faculty, and that such other embodiments are within the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", etc., indicate orientations or positional relationships, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "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. It will be apparent, however, to one skilled in the art that the embodiments may be practiced without 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 first embodiment is as follows:
the application provides a matte powder coating for hubs, which specifically comprises the following components: polyester resin, curing agent, leveling agent, flatting agent, benzoin, degassing agent, wax powder, pigment and filler.
Wherein, relative to 65 weight portions of polyester resin, 5 to 6 weight portions of curing agent, 0.8 to 1.2 weight portions of leveling agent, acrylic acid homopolymer is selected as the leveling agent, the polyester resin and the leveling agent ensure the best leveling effect, and the added curing agent can control the coating to cure after the leveling maximization, so that the surface of the coating is the best leveling, and from the above viewpoint, further, the curing agent is preferably 5.5 weight portions, and the leveling agent is preferably 1 weight portion.
In addition, relative to 65 parts by weight of polyester resin, the flatting agent is 4-5 parts by weight, the benzoin is 0.3-0.8 part by weight, the degasifying agent is 0.3-0.8 part by weight, the flatting agent more than 4 parts by weight, the benzoin more than 0.3 part by weight and the degasifying agent more than 0.3 part by weight are added, so that the powder coating can effectively eliminate inner cells during film forming, the coating after film forming can have good wear resistance, the coating after film forming has good effect on glossiness and improves the surface aesthetic feeling of a sprayed product, and the flatting agent less than 5 parts by weight, the benzoin less than 0.8 part by weight and the degasifying agent less than 0.8 part by weight can achieve the effect, and can be mixed with the curing agent and the flatting agent without causing performance loss, so that the powder coating forms a flat and smooth surface during film forming, The uniform film coating effectively reduces the surface tension during coating, and prevents the generation of pores and spots during film forming by matching with benzoin. Based on this, benzoin is preferably 0.5 parts by weight, a matting agent is preferably 4 parts by weight, and a degassing agent is preferably 30 parts by weight. Benzoin is benzoin, and the melting point is 133-137 ℃.
Relative to 65 parts by weight of polyester resin, 0.3-0.8 part by weight of wax powder, 0.8-1.2 parts by weight of pigment and 30-35 parts by weight of filler. By adding more than 0.3 weight part of wax powder, more than 0.8 weight part of pigment and more than 30 weight parts of filler, the powder coating can have high hardness, and the hub does not need to be baked for a long time after being coated on the aluminum hub of the automobile, so that the brittleness of the aluminum hub is prevented from being increased. By adding less than 0.8 weight part of wax powder, less than 1.2 weight parts of pigment and less than 35 weight parts of filler, the coating has good compactness, good adhesive force, impact strength and toughness, high corner coverage rate, and excellent chemical corrosion resistance and electrical insulation performance while achieving the effects. Based on this, the wax powder is preferably 0.5 parts by weight, the pigment is preferably 1 part by weight, and the filler is preferably 21 parts by weight. The pigment is carbon black, the filler is barium sulfate, and the melting point of the wax powder is 140 ℃.
The matte powder coating can also be prepared into a hub with a matte powder coating, a curing agent, a flatting agent and a flatting agent are added into polyester resin, and under the combined action of benzoin, a degassing agent, wax powder, pigment and filler, when the obtained matte powder coating is sprayed on the surface of an aluminum hub, the leveling effect of the coating formed by curing and film forming is better than that of the coating formed by common powder, and a layer of colored paint or varnish is required to be sprayed on the surface of the coating to prevent the surface of the coating from being scratched after the general conventional matte powder coating is sprayed, so that the production process is more complicated, the time is longer, and the energy consumption is higher in the practical application.
After a layer of colored paint or varnish is sprayed, the wheel hub needs to be baked to enable the colored paint to be adhered to the paint, however, the brittleness of the aluminum wheel hub can be increased after the wheel hub is baked too much, the automobile aluminum wheel hub serving as a main bearing part of an automobile needs to have enough mechanical strength and enough toughness to ensure the impact resistance, and the impact resistance of the wheel hub can be reduced after the wheel hub is baked too much to cause danger. The toughness of the aluminum hub can be improved by reducing the baking times, but the sprayed colored paint or varnish can not be effectively adhered to the surface of the coating and can be peeled off.
The matte powder coating can also form a vehicle.
The preparation method of the matte powder coating for the wheel hub comprises the following steps: weighing raw materials: weighing corresponding polyester resin, curing agent, flatting agent, benzoin, degassing agent, wax powder, pigment and filler according to the weight 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 bed charge by 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 powder coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The premixing time is 10-25 min. The high-speed mixing speed is 330 r/min.
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 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.3 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 2 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.4 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 3 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 4 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.6 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 5 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.7 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 6 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.8 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
Comparative example 1
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.2 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
Comparative example 2
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.9 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 7 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 8 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 31 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 9 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 32 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 10 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 33 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 11 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 34 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 12 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 35 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
Comparative example 3
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 28 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
Comparative example 4
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 37 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 13 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 14 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.2 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 15 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.4 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 16 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.6 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 17 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.8 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 18 ]
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
Comparative example 5
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 3.8 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
Comparative example 6
Weighing 65 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 5.2 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 19 ]
Weighing 60 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 0.8 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; 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 base material into sheets by using 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. The premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The premixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 20 ]
Weighing 62 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 0.9 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; 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 base material into sheets by using 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. The premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The premixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 21 ]
Weighing 64 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; feeding: putting the raw materials into a mixer for mixing; premixing: mixing the raw materials up and down uniformly 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 with a rotary screen to obtain powder coating, and packaging the coating into boxes. The premixing step is carried out by high-speed mixing and side shearing crushing simultaneously. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The pre-mixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 22 ]
Weighing 66 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1.1 parts by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; 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 base material into sheets by using 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. The premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The premixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 23 ]
Weighing 68 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1.2 parts by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; 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 base material into sheets by using 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. The premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The premixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
[ example 24 ]
Weighing 70 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1.2 parts by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; 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 base material into sheets by using 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. The premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The premixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
Comparative example 7
Weighing 58 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 0.7 part by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; 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 base material into sheets by using 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. The premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The premixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
Comparative example 8
Weighing 72 parts by weight of polyester resin, 5.5 parts by weight of curing agent, 1.3 parts by weight of flatting agent, 4.5 parts by weight of flatting agent, 0.5 part by weight of benzoin, 0.5 part by weight of degassing agent, 0.5 part by weight of wax powder, 1 part by weight of pigment and 30 parts by weight of filler; 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 base material into sheets by using 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. The premixing step is carried out by simultaneously carrying out high-speed mixing and side shearing crushing. The screw rotation of the extruder in the melt extrusion mixing step was 40 HZ. The temperature is controlled between 70 and 80 ℃ during melt extrusion mixing, and the temperature of a discharge port of the extruder is not higher than 140 ℃. During fine grinding, the particle size after fine grinding is controlled by adjusting a host and grading. The premixing time is 10-25 min. The high-speed mixing rotating speed is 330 r/min.
For the gloss, flatness, hardness, scratch resistance of the above examples and comparative examples, the test methods were as follows:
(1) gloss: gloss was used together for detection.
(2) Hardness: pencil method for measuring hardness of coating film.
(3) Scratch resistance: newton's pen test method, IOS-TM-0002 standard.
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
| Degree of gloss | Flatness of | Hardness of | Scratch-resistant coating | |
| Example 1 | 95％ | 96％ | 3h | 3 |
| Example 2 | 95％ | 96％ | 3h | 4 |
| Example 3 | 95％ | 96％ | 3h | 5 |
| Example 4 | 95％ | 96％ | 3h | 5 |
| Example 5 | 95％ | 96％ | 3h | 5 |
| Example 6 | 95％ | 96％ | 3h | 5 |
| Comparative example 1 | 95％ | 96％ | 3h | 2 |
| Comparative example 2 | 95％ | 96％ | 3h | 6 |
As can be seen from tables 1-2, with the increase of the content of the wax powder, the scratch resistance of the matte powder coating is gradually enhanced, the gloss can be kept in a stable state and cannot be reduced with the addition of the wax powder, the preferred range of the wax powder is 0.5-0.8 by weight, and the gloss, the flatness and the hardness of the matte powder coating are relatively stable within the range.
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, the barium sulfate as the filler mainly affects the hardness of the matte powder coating, and has little influence on the glossiness, the flatness and the scratch resistance of the matte powder coating. The preferable range of the filler is 33-35 parts by mass, the hardness of the matte powder coating is higher in the range and is larger than 6H, meanwhile, the addition of the filler does not influence other performances of the matte powder coating in a larger range, the other performances can be kept in a higher state after the filler is added, the surface of the hub can have better scratch resistance after the matte powder coating is sprayed, the produced powder coating has good spraying workability and good surface gloss after spraying, and the surface decoration and aesthetic feeling of a sprayed product are greatly improved.
The compounding ratios of the raw materials in examples 13 to 18 and comparative examples 5 to 6 are summarized in Table 5.
TABLE 5
The evaluation results of examples 13 to 18 and comparative examples 5 to 6 are summarized in Table 6.
TABLE 6
| Degree of gloss | Flatness of | Hardness of | Scratch-resistant coating | |
| Example 13 | 96％ | 96％ | 3h | 3 |
| Example 14 | 95％ | 96％ | 3h | 4 |
| Example 15 | 94％ | 96％ | 3h | 5 |
| Example 16 | 92％ | 96％ | 3h | 5 |
| Example 17 | 91％ | 96％ | 3h | 5 |
| Example 18 | 91％ | 96％ | 3h | 5 |
| Comparative example 5 | 96％ | 96％ | 3h | 2 |
| Comparative example 6 | 89％ | 96％ | 3h | 6 |
As can be seen from tables 5-6, the gloss of the matte powder coating is mainly affected by the flatting agent, and other properties of the powder are basically not affected at all, the preferred range of the flatting agent is 4.8-5 parts by weight, the gloss of the matte powder coating in the range is relatively stable, and the phenomenon that the surface of a hub is too bright due to overhigh gloss of the matte powder coating is avoided.
The compounding ratios of the raw materials in examples 19 to 24 and comparative examples 7 to 8 are summarized in Table 7.
TABLE 7
The evaluation results of examples 19 to 24 and comparative examples 7 to 8 are summarized in Table 8.
TABLE 8
| Degree of gloss | Flatness of | Hardness of | Scratch-resistant coating | |
| Example 19 | 95％ | 93％ | 3h | 3 |
| Example 20 | 95％ | 94％ | 3h | 4 |
| Example 21 | 95％ | 95％ | 3h | 5 |
| Example 22 | 95％ | 98％ | 3h | 5 |
| Example 23 | 95％ | 99％ | 3h | 5 |
| Example 24 | 95％ | 99％ | 3h | 5 |
| Comparative example 7 | 95％ | 92％ | 3h | 2 |
| Comparative example 8 | 95％ | 98％ | 3h | 6 |
From tables 7-8, it can be seen that the polyester resin and the leveling agent mainly affect the flatness of the matte powder coating and have little effect on other properties of the matte powder coating. 68-70 parts of polyester resin and 1-1.2 parts of flatting agent, wherein the flatness of the matt powder coating is more than 99%, and the glossiness, hardness and scratch resistance of the matt powder coating are relatively stable, the reaction speed of the matt powder coating can determine the surface flatting effect of the powder coating, the flow melting degree of the powder coating in the curing process is improved by utilizing the polyester resin and the flatting agent, and the coating curing is carried out after the powder coating is maximally leveled, so that the surface flatting effect of the coating is optimal, and only one layer of base powder is needed for improving and enhancing the raw materials of the powder coating by selecting high-hardness resin, different catalytic accelerators and flatting agents, the environmental protection is improved, and the scratch resistance of the powder coating is better.
Finally, the comparison of the properties of the matte powder coating of the present application with respect to the ordinary powder is given in the table below
Although the illustrative embodiments of the present application have been described above to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the embodiments, and various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the present application as defined and defined by the appended claims.
Claims (10)
1. A matte powder coating for hubs comprises the following components in parts by weight:
2. the matte powder coating for hubs of claim 1, wherein the leveling agent is an acrylic homopolymer.
3. The matte powder coating for wheel hubs of claim 1, wherein said matting agent is a carboxy acrylic acid.
4. A matte powder coating for wheel hubs as claimed in claim 1, wherein said benzoin is benzoin, and has a melting point of 133-137 ℃.
5. A matte powder coating for a wheel hub according to claim 1, wherein said wax powder has a melting point of 140 ℃.
6. A matte powder coating for hubs according to claim 1, wherein said pigment is carbon black.
7. A matte powder coating for hubs according to claim 1, wherein said filler is barium sulfate.
8. A hub made by applying the matte powder coating for a hub of any one of claims 1-7.
9. A vehicle incorporating a hub as claimed in claim 8.
10. A preparation method of a matte powder coating for a wheel hub comprises the following steps:
weighing raw materials: weighing corresponding polyester resin, curing agent, flatting agent, benzoin, degassing agent, wax powder, pigment and filler according to the weight 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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| CN114410196A (en) * | 2021-12-20 | 2022-04-29 | 江南载福粉末涂料（张家港）有限公司 | Boiling-resistant powder coating and preparation method and application thereof |
| CN116162395A (en) * | 2022-12-09 | 2023-05-26 | 江南载福粉末涂料（张家港）有限公司 | Low-light powder coating and preparation method and application thereof |
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