CN111961389A - Novel environment-friendly thermosetting powder coating formula and preparation process - Google Patents
Novel environment-friendly thermosetting powder coating formula and preparation process Download PDFInfo
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- CN111961389A CN111961389A CN202010498685.2A CN202010498685A CN111961389A CN 111961389 A CN111961389 A CN 111961389A CN 202010498685 A CN202010498685 A CN 202010498685A CN 111961389 A CN111961389 A CN 111961389A
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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
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/80—Processes for incorporating ingredients
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- 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
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Abstract
The invention discloses a novel environment-friendly thermosetting powder coating formula and a preparation process, wherein the novel environment-friendly thermosetting powder coating is prepared from the following raw materials: modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a leveling agent, high-temperature pigment and other auxiliary agents; the raw materials are prepared from the following components in parts by weight: 400-500 g of modified resin, 20-30 g of crosslinking curing, 140-160 g of mica powder, 180-198 g of talcum powder, 140-150 g of hollow micro powder, 3-5 g of defoaming agent, 3-8 g of flatting agent, 15-24 g of high-temperature pigment and 1-1.5 g of other auxiliary agents. The invention weighs the material according to the formula, then adds the material into a high-speed mixer for premixing, the mixed material is sent to a hopper of a melt extruder to melt, extrude and mix all the components, the components are dispersed evenly, the melted and mixed material is pressed into slices by a cooling tablet machine, and is cooled at the same time, the cooled slices are crushed into small pieces when passing through a roller mill, the small pieces are sent to an air classification mill for fine crushing, and the finished product powder is obtained after sieving.
Description
Technical Field
The invention relates to the related technical field of powder coatings, in particular to a novel environment-friendly thermosetting powder coating formula and a manufacturing process.
Background
With the acceleration of the modernization pace of our country and the rapid development of economy, especially in recent years, the coating technical level and the quality requirement of our country are continuously improved, the depth and the breadth of the application field are continuously expanded, and the powder coating replaces paint to become the most ideal product for coating and preventing corrosion on the metal surface, especially the high-grade metal surface. Since 2000, the market demand has increased at a rate of 10% every year, and the application has been expanded to a plurality of fields such as automobiles, ships, pipelines, construction engineering and the like on the original basis. The development direction of the powder coating in the future, namely low-temperature curing, enables the powder coating to be suitable for coating of heat-sensitive materials and better meets the rail with solvent-based coatings; the coating is thin and can be used for a continuous coating with the thickness of 30 micrometers so as to occupy more solvent-based paint markets; functionalization, mainly including powder coating which provides special protection and decoration functions for coated objects such as heavy-duty anticorrosion type, high temperature resistance type, weather resistance type, flame retardation type, conductive type and the like; specialized special powder coating for automobiles, precoated steel plates and the like; art type, develop matt, high gloss, high brilliance, metallic glitter and veined pattern powder coating.
The inventor of the invention finds that the thermosetting powder coating in the prior art has simple formula and single use mode due to the design characteristics of the thermosetting powder coating, and reduces the quality of protecting the thermosetting powder coating and a substrate in the actual use process, thereby reducing the service life of the substrate and further failing to meet various use requirements of the thermosetting powder coating at present;
therefore, a novel environment-friendly thermosetting powder coating formula and a manufacturing process are provided.
Disclosure of Invention
The invention aims to provide a novel environment-friendly thermosetting powder coating formula and a manufacturing process, and aims to solve the problems that the thermosetting powder coating in the prior art is simple in formula and single in use mode due to the design characteristics of the thermosetting powder coating, the quality of protection between the thermosetting powder coating and a substrate is reduced in the actual use process, the service life of the substrate is shortened, and various use requirements of the thermosetting powder coating at present cannot be met.
In order to achieve the purpose, the invention is realized by the following technical scheme: a novel environment-friendly thermosetting powder coating formula is prepared from the following raw materials: modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a leveling agent, high-temperature pigment and other auxiliary agents; the raw materials are prepared from the following components in parts by weight: 400-500 g of modified resin, 20-30 g of crosslinking curing, 140-160 g of mica powder, 180-198 g of talcum powder, 140-150 g of hollow micro powder, 3-5 g of defoaming agent, 3-8 g of flatting agent, 15-24 g of high-temperature pigment and 1-1.5 g of other auxiliary agents.
As a preferable aspect of the invention, the raw materials are prepared from the following components in parts by weight: 400g of modified resin, 20g of cross-linking curing, 140g of mica powder, 180g of talcum powder, 140g of hollow micro powder, 3g of defoaming agent, 3g of flatting agent, 15g of high-temperature pigment and 1g of other auxiliary agents.
As a preferable aspect of the invention, the raw materials are prepared from the following components in parts by weight: 450g of modified resin, 25g of cross-linking curing, 150g of mica powder, 185g of talcum powder, 145g of hollow micro powder, 4g of defoaming agent, 6g of flatting agent, 20g of high-temperature pigment and 1.3g of other auxiliary agents.
As a preferable aspect of the invention, the raw materials are prepared from the following components in parts by weight: 500g of modified resin, 30g of cross-linking curing, 160g of mica powder, 198g of talcum powder, 150g of hollow micro powder, 5g of defoaming agent, 8g of flatting agent, 24g of high-temperature pigment and 1.5g of other auxiliary agents.
The invention comprises the following steps: material selection and preparation → weighing → premixing → melt extrusion mixing → drying, cooling → crushing → fine crushing and grading sieving → packaging finished products;
s1 selecting and preparing materials
Selecting materials of modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a leveling agent, high-temperature pigment and other auxiliary agents according to actual use requirements; the modified resin is one of the main components of the paint, has the functions of film formation and uniform color spreading, and can be well attached to a substrate;
s2 weighing
Respectively weighing modified resin, cross-linked curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a flatting agent, high-temperature pigment and other auxiliary agents according to a certain proportion;
s3 premixing
The modified resin, the crosslinking curing, the mica powder, the talcum powder, the hollow micro powder, the defoaming agent, the flatting agent, the high-temperature pigment and other auxiliary agent powder materials are uniformly mixed by a mixer in a dry state, so that conditions are created for melt extrusion, and a better dispersion effect is obtained;
s4 melt extrusion mixing
S4.1, further homogenizing the material on the basis of complete melting;
s4.2, ensuring the components in the powder coating particles to be uniform, and extruding the powder coating particles by using an extruder at a constant temperature, a constant pressure and a constant quantity; in order to ensure good melt extrusion effect, the extruder in S4.2 is a single-screw extruder or a double-screw extruder, the mixer in S3 is a high-speed premixing machine or a container premixing machine, and a discharge port of the mixer is connected with a hopper of the extruder, and the high-speed premixing machine or the container premixing machine has the characteristics of easy cleaning and short mixing time, and the operation time is only 2 min-3 min, so that the production efficiency of the coating is effectively improved;
s5, drying and cooling
S5.1: the material is in a sticky state when coming out of the melting mixer, and is pressed into a sheet shape by a tabletting and cooling roller with cooling water;
s5.2: conveying to a cooling belt for cooling;
the purpose of cooling is to prevent the modified resin and the crosslinking curing agent from further reacting to influence the leveling property of the powder coating, and the materials must be cooled as soon as possible to ensure that the temperature of the materials is lower;
s6 crushing
Crushing the slices into small pieces by a crusher arranged at the terminal of a cooling belt, and preparing the small pieces for fine crushing;
s7 fine crushing and grading sieving
S7.1, separating and removing the ultrafine powder coating by using a cyclone separator;
s7.2, removing the coarse powder coating by using sieving equipment to obtain a product suitable for electrostatic coating of the powder coating;
s8 packaging the product
And packaging the product for electrostatic coating of the powder coating by using a quantitative packaging machine according to a certain use requirement.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable design, the invention relates to a novel environment-friendly thermosetting powder coating formula and a preparation process, modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, defoaming agent, flatting agent, high-temperature pigment and other auxiliary agents are weighed according to the formula, then added into a high-speed mixer for premixing, the mixed materials are sent to a hopper of a melting extruder, the components are melted, extruded and mixed, and are dispersed uniformly, the melted and mixed materials are pressed into sheets through a cooling tablet machine, and are cooled simultaneously, the cooled sheets are crushed into small pieces when passing through a roller machine, and the small pieces are conveyed to an air classification mill for fine crushing, and the finished powder is obtained after sieving.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
A novel environment-friendly thermosetting powder coating formula is prepared from the following raw materials: the feed is prepared from the following raw materials: modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a leveling agent, high-temperature pigment and other auxiliary agents; the raw materials are prepared from the following components in parts by weight: 400-500 g of modified resin, 20-30 g of crosslinking curing, 140-160 g of mica powder, 180-198 g of talcum powder, 140-150 g of hollow micro powder, 3-5 g of defoaming agent, 3-8 g of flatting agent, 15-24 g of high-temperature pigment and 1-1.5 g of other auxiliary agents.
400g of modified resin, 20g of cross-linking curing, 140g of mica powder, 180g of talcum powder, 140g of hollow micro powder, 3g of defoaming agent, 3g of flatting agent, 15g of high-temperature pigment and 1g of other auxiliary agents.
The invention comprises the following steps: material selection and preparation → weighing → premixing → melt extrusion mixing → drying, cooling → crushing → fine crushing and grading sieving → packaging finished products;
s1 selecting and preparing materials
Selecting materials of modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a leveling agent, high-temperature pigment and other auxiliary agents according to actual use requirements; the modified resin is one of the main components of the paint, has the functions of film formation and uniform color spreading, and can be well attached to a substrate;
s2 weighing
Respectively weighing modified resin, cross-linked curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a flatting agent, high-temperature pigment and other auxiliary agents according to a certain proportion;
s3 premixing
The modified resin, the crosslinking curing, the mica powder, the talcum powder, the hollow micro powder, the defoaming agent, the flatting agent, the high-temperature pigment and other auxiliary agent powder materials are uniformly mixed by a mixer in a dry state, so that conditions are created for melt extrusion, and a better dispersion effect is obtained;
s4 melt extrusion mixing
S4.1, further homogenizing the material on the basis of complete melting;
s4.2, ensuring the components in the powder coating particles to be uniform, and extruding the powder coating particles by using an extruder at a constant temperature, a constant pressure and a constant quantity; in order to ensure good melt extrusion effect, the extruder in S4.2 is set as one of a single-screw extruder or a double-screw extruder, the mixer in S3 is set as a high-speed premixing machine or a container premixing machine, and a discharge port of the mixer is connected with a hopper of the extruder, and the high-speed premixing machine or the container premixing machine has the characteristics of easy cleaning and short mixing time, and the operation time is only 2 min-3 min, so that the production efficiency of the coating is effectively improved;
s5, drying and cooling
S5.1: the material is in a sticky state when coming out of the melting mixer, and is pressed into a sheet shape by a tabletting and cooling roller with cooling water;
s5.2: conveying to a cooling belt for cooling;
the purpose of cooling is to prevent the modified resin and the crosslinking curing agent from further reacting to affect the leveling property of the powder coating, and the materials must be cooled as soon as possible to ensure that the temperature of the materials is lower
S6 crushing
Crushing the slices into small pieces by a crusher arranged at the terminal of a cooling belt, and preparing the small pieces for fine crushing;
s7 fine crushing and grading sieving
S7.1, separating and removing the ultrafine powder coating by using a cyclone separator;
s7.2, removing the coarse powder coating by using sieving equipment to obtain a product suitable for electrostatic coating of the powder coating;
s8 packaging the product
And packaging the product for electrostatic coating of the powder coating by using a quantitative packaging machine according to a certain use requirement.
Example 2
A novel environment-friendly thermosetting powder coating formula is prepared from the following raw materials: the feed is prepared from the following raw materials: modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a leveling agent, high-temperature pigment and other auxiliary agents; the raw materials are prepared from the following components in parts by weight: 400-500 g of modified resin, 20-30 g of crosslinking curing, 140-160 g of mica powder, 180-198 g of talcum powder, 140-150 g of hollow micro powder, 3-5 g of defoaming agent, 3-8 g of flatting agent, 15-24 g of high-temperature pigment and 1-1.5 g of other auxiliary agents.
The raw materials are prepared from the following components in parts by weight: 450g of modified resin, 25g of cross-linking curing, 150g of mica powder, 185g of talcum powder, 145g of hollow micro powder, 4g of defoaming agent, 6g of flatting agent, 20g of high-temperature pigment and 1.3g of other auxiliary agents.
The invention comprises the following steps: material selection and preparation → weighing → premixing → melt extrusion mixing → drying, cooling → crushing → fine crushing and grading sieving → packaging finished products;
s1 selecting and preparing materials
Selecting materials of modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a leveling agent, high-temperature pigment and other auxiliary agents according to actual use requirements; the modified resin is one of the main components of the paint, has the functions of film formation and uniform color spreading, and can be well attached to a substrate;
s2 weighing
Respectively weighing modified resin, cross-linked curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a flatting agent, high-temperature pigment and other auxiliary agents according to a certain proportion;
s3 premixing
The modified resin, the crosslinking curing, the mica powder, the talcum powder, the hollow micro powder, the defoaming agent, the flatting agent, the high-temperature pigment and other auxiliary agent powder materials are uniformly mixed by a mixer in a dry state, so that conditions are created for melt extrusion, and a better dispersion effect is obtained;
s4 melt extrusion mixing
S4.1, further homogenizing the material on the basis of complete melting;
s4.2, ensuring the components in the powder coating particles to be uniform, and extruding the powder coating particles by using an extruder at a constant temperature, a constant pressure and a constant quantity; in order to ensure good melt extrusion effect, the extruder in S4.2 is set as one of a single-screw extruder or a double-screw extruder, the mixer in S3 is set as a high-speed premixing machine or a container premixing machine, and a discharge port of the mixer is connected with a hopper of the extruder, and the high-speed premixing machine or the container premixing machine has the characteristics of easy cleaning and short mixing time, and the operation time is only 2 min-3 min, so that the production efficiency of the coating is effectively improved;
s5, drying and cooling
S5.1: the material is in a sticky state when coming out of the melting mixer, and is pressed into a sheet shape by a tabletting and cooling roller with cooling water;
s5.2: conveying to a cooling belt for cooling;
the purpose of cooling is to prevent the modified resin and the crosslinking curing agent from further reacting to affect the leveling property of the powder coating, and the materials must be cooled as soon as possible to ensure that the temperature of the materials is lower
S6 crushing
Crushing the slices into small pieces by a crusher arranged at the terminal of a cooling belt, and preparing the small pieces for fine crushing;
s7 fine crushing and grading sieving
S7.1, separating and removing the ultrafine powder coating by using a cyclone separator;
s7.2, removing the coarse powder coating by using sieving equipment to obtain a product suitable for electrostatic coating of the powder coating;
s8 packaging the product
And packaging the product for electrostatic coating of the powder coating by using a quantitative packaging machine according to a certain use requirement.
Example 3
A novel environment-friendly thermosetting powder coating formula is prepared from the following raw materials: the feed is prepared from the following raw materials: modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a leveling agent, high-temperature pigment and other auxiliary agents; the raw materials are prepared from the following components in parts by weight: 400-500 g of modified resin, 20-30 g of crosslinking curing, 140-160 g of mica powder, 180-198 g of talcum powder, 140-150 g of hollow micro powder, 3-5 g of defoaming agent, 3-8 g of flatting agent, 15-24 g of high-temperature pigment and 1-1.5 g of other auxiliary agents.
The raw materials are prepared from the following components in parts by weight: 500g of modified resin, 30g of cross-linking curing, 160g of mica powder, 198g of talcum powder, 150g of hollow micro powder, 5g of defoaming agent, 8g of flatting agent, 24g of high-temperature pigment and 1.5g of other auxiliary agents.
The invention comprises the following steps: material selection and preparation → weighing → premixing → melt extrusion mixing → drying, cooling → crushing → fine crushing and grading sieving → packaging finished products;
s1 selecting and preparing materials
Selecting materials of modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a leveling agent, high-temperature pigment and other auxiliary agents according to actual use requirements; the modified resin is one of the main components of the paint, has the functions of film formation and uniform color spreading, and can be well attached to a substrate;
s2 weighing
Respectively weighing modified resin, cross-linked curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a flatting agent, high-temperature pigment and other auxiliary agents according to a certain proportion;
s3 premixing
The modified resin, the crosslinking curing, the mica powder, the talcum powder, the hollow micro powder, the defoaming agent, the flatting agent, the high-temperature pigment and other auxiliary agent powder materials are uniformly mixed by a mixer in a dry state, so that conditions are created for melt extrusion, and a better dispersion effect is obtained;
s4 melt extrusion mixing
S4.1, further homogenizing the material on the basis of complete melting;
s4.2, ensuring the components in the powder coating particles to be uniform, and extruding the powder coating particles by using an extruder at a constant temperature, a constant pressure and a constant quantity; in order to ensure good melt extrusion effect, the extruder in S4.2 is set as one of a single-screw extruder or a double-screw extruder, the mixer in S3 is set as a high-speed premixing machine or a container premixing machine, and a discharge port of the mixer is connected with a hopper of the extruder, and the high-speed premixing machine or the container premixing machine has the characteristics of easy cleaning and short mixing time, and the operation time is only 2 min-3 min, so that the production efficiency of the coating is effectively improved;
s5, drying and cooling
S5.1: the material is in a sticky state when coming out of the melting mixer, and is pressed into a sheet shape by a tabletting and cooling roller with cooling water;
s5.2: conveying to a cooling belt for cooling;
the purpose of cooling is to prevent the modified resin and the crosslinking curing agent from further reacting to affect the leveling property of the powder coating, and the materials must be cooled as soon as possible to ensure that the temperature of the materials is lower
S6 crushing
Crushing the slices into small pieces by a crusher arranged at the terminal of a cooling belt, and preparing the small pieces for fine crushing;
s7 fine crushing and grading sieving
S7.1, separating and removing the ultrafine powder coating by using a cyclone separator;
s7.2, removing the coarse powder coating by using sieving equipment to obtain a product suitable for electrostatic coating of the powder coating;
s8 packaging the product
And packaging the product for electrostatic coating of the powder coating by using a quantitative packaging machine according to a certain use requirement.
In addition, the curing mechanism in the invention is
The invention has the beneficial effects that: the invention has reasonable design, the invention relates to a novel environment-friendly thermosetting powder coating formula and a preparation process, modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, defoaming agent, flatting agent, high-temperature pigment and other auxiliary agents are weighed according to the formula, then added into a high-speed mixer for premixing, the mixed materials are sent to a hopper of a melting extruder, the components are melted, extruded and mixed, and are dispersed uniformly, the melted and mixed materials are pressed into sheets through a cooling tablet machine, and are cooled simultaneously, the cooled sheets are crushed into small pieces when passing through a roller machine, and the small pieces are conveyed to an air classification mill for fine crushing, and the finished powder is obtained after sieving.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A novel environment-friendly thermosetting powder coating formula is characterized in that: the feed is prepared from the following raw materials: modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a leveling agent, high-temperature pigment and other auxiliary agents; the raw materials are prepared from the following components in parts by weight: 400-500 g of modified resin, 20-30 g of crosslinking curing, 140-160 g of mica powder, 180-198 g of talcum powder, 140-150 g of hollow micro powder, 3-5 g of defoaming agent, 3-8 g of flatting agent, 15-24 g of high-temperature pigment and 1-1.5 g of other auxiliary agents.
2. The novel environment-friendly thermosetting powder coating formula as claimed in claim 1, wherein the raw materials are prepared from the following components in parts by weight: 400g of modified resin, 20g of cross-linking curing, 140g of mica powder, 180g of talcum powder, 140g of hollow micro powder, 3g of defoaming agent, 3g of flatting agent, 15g of high-temperature pigment and 1g of other auxiliary agents.
3. The novel environment-friendly thermosetting powder coating formula as claimed in claim 1, wherein the raw materials are prepared from the following components in parts by weight: 450g of modified resin, 25g of cross-linking curing, 150g of mica powder, 185g of talcum powder, 145g of hollow micro powder, 4g of defoaming agent, 6g of flatting agent, 20g of high-temperature pigment and 1.3g of other auxiliary agents.
4. The novel environment-friendly thermosetting powder coating formula as claimed in claim 1, wherein the raw materials are prepared from the following components in parts by weight: 500g of modified resin, 30g of cross-linking curing, 160g of mica powder, 198g of talcum powder, 150g of hollow micro powder, 5g of defoaming agent, 8g of flatting agent, 24g of high-temperature pigment and 1.5g of other auxiliary agents.
5. The formulation of the novel environmentally friendly thermosetting powder coating and the process for preparing the same as claimed in claim 1, wherein the process comprises the steps of: material selection and preparation → weighing → premixing → melt extrusion mixing → drying, cooling → crushing → fine crushing and grading sieving → packaging finished products;
s1 selecting and preparing materials
Selecting materials of modified resin, crosslinking and curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a leveling agent, high-temperature pigment and other auxiliary agents according to actual use requirements;
s2 weighing
Respectively weighing modified resin, cross-linked curing, mica powder, talcum powder, hollow micro powder, a defoaming agent, a flatting agent, high-temperature pigment and other auxiliary agents according to a certain proportion;
s3 premixing
The modified resin, the crosslinking curing, the mica powder, the talcum powder, the hollow micro powder, the defoaming agent, the flatting agent, the high-temperature pigment and other auxiliary agent powder materials are uniformly mixed by a mixer in a dry state;
s4 melt extrusion mixing
S4.1, further homogenizing the material on the basis of complete melting;
s4.2, ensuring the components in the powder coating particles to be uniform, and extruding the powder coating particles by using an extruder at a constant temperature, a constant pressure and a constant quantity;
s5, drying and cooling
S5.1: the material is in a sticky state when coming out of the melting mixer, and is pressed into a sheet shape by a tabletting and cooling roller with cooling water;
s5.2: conveying to a cooling belt for cooling;
s6 crushing
Crushing the slices into small pieces by a crusher arranged at the terminal of a cooling belt, and preparing the small pieces for fine crushing;
s7 fine crushing and grading sieving
S7.1, separating and removing the ultrafine powder coating by using a cyclone separator;
s7.2, removing the coarse powder coating by using sieving equipment to obtain a product suitable for electrostatic coating of the powder coating;
s8 packaging the product
And packaging the product for electrostatic coating of the powder coating by using a quantitative packaging machine according to a certain use requirement.
6. The formulation and process of claim 5, wherein the extruder of S4.2 is a single screw extruder or a twin screw extruder.
7. The formulation and process of claim 6, wherein the mixer of S3 is a high-speed pre-mixer or a container pre-mixer, and the outlet of the mixer is connected to the hopper of the extruder.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113667361A (en) * | 2021-09-27 | 2021-11-19 | 赣州立幸邦新材料有限公司 | PVDF solid fluorocarbon coating and preparation process thereof |
| CN114106607A (en) * | 2021-10-25 | 2022-03-01 | 安徽华辉塑业科技股份有限公司 | High-temperature-resistant powder coating |
| CN114851516A (en) * | 2022-06-07 | 2022-08-05 | 梁海龙 | Powder coating and preparation process thereof |
-
2020
- 2020-06-04 CN CN202010498685.2A patent/CN111961389A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113667361A (en) * | 2021-09-27 | 2021-11-19 | 赣州立幸邦新材料有限公司 | PVDF solid fluorocarbon coating and preparation process thereof |
| CN114106607A (en) * | 2021-10-25 | 2022-03-01 | 安徽华辉塑业科技股份有限公司 | High-temperature-resistant powder coating |
| CN114851516A (en) * | 2022-06-07 | 2022-08-05 | 梁海龙 | Powder coating and preparation process thereof |
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