CN112552787A - Preparation method of low-temperature cured composite resin powder coating - Google Patents
Preparation method of low-temperature cured composite resin powder coating Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- C09D177/00—Coating compositions based on polyamides obtained by reactions forming a carboxylic amide 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
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/325—Calcium, strontium or barium phosphate
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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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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Abstract
The invention belongs to the field of powder coating processing, in particular to a preparation method of a low-temperature curing composite resin powder coating, aiming at the problems that the existing preparation process has poor crushing effect on materials, influences the grinding efficiency and reduces the preparation speed, the following scheme is proposed, and the preparation method comprises the following steps: s1: preparing 10-20 parts of polyamide resin, 15-25 parts of epoxy resin, 5-10 parts of titanium dioxide, 5-10 parts of calcium carbonate, 5-10 parts of calcium phosphate, 3-8 parts of mica, 5-10 parts of barium sulfate, 4-6 parts of talcum powder, 5-10 parts of kieselguhr and 5-10 parts of composite ferrotitanium powder. The preparation method has the advantages that the material crushing effect is good, the grinding efficiency is improved, the preparation speed is improved, the anti-corrosion effect of the coating is good, the melting temperature of the low-temperature cured composite resin powder coating is low, and the melting leveling of the composite powder coating under the low-temperature condition can be guaranteed.
Description
Technical Field
The invention relates to the technical field of powder coating processing, in particular to a preparation method of a low-temperature cured composite resin powder coating.
Background
The powder coating is mainly solid powder formed by mixing resin, a curing agent, pigment, filler, an auxiliary agent and the like, is coated on the surface of a coated object in an electrostatic spraying mode, is melted and leveled by baking, and is cured into a film;
however, the existing preparation process has poor crushing effect on materials, influences the grinding efficiency and reduces the preparation speed.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a preparation method of a low-temperature curing composite resin powder coating.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of low-temperature curing composite resin powder coating comprises the following steps:
s1: preparing 10-20 parts of polyamide resin, 15-25 parts of epoxy resin, 5-10 parts of titanium dioxide, 5-10 parts of calcium carbonate, 5-10 parts of calcium phosphate, 3-8 parts of mica, 5-10 parts of barium sulfate, 4-6 parts of talcum powder, 5-10 parts of kieselguhr, 5-10 parts of composite ferrotitanium powder, 6-8 parts of a curing agent and 3-8 parts of a flatting agent;
s2: putting polyamide resin and epoxy resin into a crushing stirrer, crushing and mixing the polyamide resin and the epoxy resin by the crushing stirrer to form composite resin powder, putting the composite resin powder into a mixer, sequentially adding titanium dioxide, calcium carbonate and calcium phosphate for stirring for 40-60 minutes, continuously adding mica, barium sulfate, talcum powder and diatomite into the mixer for stirring and mixing for 30-40 minutes;
s3: adding the composite iron-titanium powder, the curing agent and the flatting agent into a mixer for stirring for 10-20 minutes to obtain a composite material, putting the composite material into a single-screw extruder, carrying out melt mixing extrusion on the composite material by the single-screw extruder, and setting the temperature in the single-screw extruder to be 85-95 ℃;
s4: the melt extruded by the single-screw extruder is immediately extruded into a sheet and cooled to avoid heat accumulation in the melt so as to prevent chemical changes in the components from affecting the quality of the product, and then a fine crusher is used for crushing the extruded material;
s5: sending the crushed powder particles into a grinding machine, grinding the crushed material by the grinding machine, sending the crushed material into a cyclone separation or rotary cylinder by wind power to achieve classification, sieving the crushed material by a 120-mesh sieve and a 150-mesh sieve, and then collecting the product;
s6: and (3) using a cyclone separator and a side filter to be matched for collecting fine powder at an air classification outlet, and finally packing and packaging qualified finished products to form the low-temperature curing composite resin powder coating.
Preferably, in S2, the mixing time of the polyamide resin and the epoxy resin by the pulverizer and mixer is 30-50 minutes, and the mixing speed is 180-240 r/min.
Preferably, in S2, the stirring speed of the mixer for stirring the titanium dioxide, the calcium carbonate and the calcium phosphate is 700-900r/min, and the stirring temperature is 20-25 ℃.
Preferably, in S2, the stirring speed of the mixer for stirring the mica, the barium sulfate, the talcum powder and the diatomite is 500-700r/min, and the stirring temperature is 15-20 ℃.
Preferably, in S3, the stirring speed of the mixer for stirring the ferrotitanium powder, the curing agent and the leveling agent is 300-500r/min, and the stirring temperature is 15-20 ℃.
Preferably, in the step S4, the cooling time is 3-10 minutes, and the cooling temperature is 30-50 ℃.
Preferably, in S4, the pulverizing time of the fine pulverizer is 15-20 minutes, and the rotation speed of the fine pulverizer is 3000-.
Preferably, in the S5, the grinding rotation speed of the grinder is 300-.
Compared with the prior art, the invention has the beneficial effects that:
the preparation method has the advantages that the material crushing effect is good, the grinding efficiency is improved, the preparation speed is improved, the anti-corrosion effect of the coating is good, the melting temperature of the low-temperature cured composite resin powder coating is low, and the melting leveling of the composite powder coating under the low-temperature condition can be guaranteed.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example one
A preparation method of low-temperature curing composite resin powder coating comprises the following steps:
s1: preparing 10-20 parts of polyamide resin, 15-25 parts of epoxy resin, 5-10 parts of titanium dioxide, 5-10 parts of calcium carbonate, 5-10 parts of calcium phosphate, 3-8 parts of mica, 5-10 parts of barium sulfate, 4-6 parts of talcum powder, 5-10 parts of kieselguhr, 5-10 parts of composite ferrotitanium powder, 6-8 parts of a curing agent and 3-8 parts of a flatting agent;
s2: putting polyamide resin and epoxy resin into a crushing stirrer, crushing and mixing the polyamide resin and the epoxy resin by the crushing stirrer to form composite resin powder, putting the composite resin powder into a mixer, sequentially adding titanium dioxide, calcium carbonate and calcium phosphate for stirring for 40-60 minutes, continuously adding mica, barium sulfate, talcum powder and diatomite into the mixer for stirring and mixing for 30-40 minutes;
s3: adding the composite iron-titanium powder, the curing agent and the flatting agent into a mixer for stirring for 10-20 minutes to obtain a composite material, putting the composite material into a single-screw extruder, carrying out melt mixing extrusion on the composite material by the single-screw extruder, and setting the temperature in the single-screw extruder to be 85-95 ℃;
s4: the melt extruded by the single-screw extruder is immediately extruded into a sheet and cooled to avoid heat accumulation in the melt so as to prevent chemical changes in the components from affecting the quality of the product, and then a fine crusher is used for crushing the extruded material;
s5: sending the crushed powder particles into a grinding machine, grinding the crushed material by the grinding machine, sending the crushed material into a cyclone separation or rotary cylinder by wind power to achieve classification, sieving the crushed material by a 120-mesh sieve and a 150-mesh sieve, and then collecting the product;
s6: and (3) using a cyclone separator and a side filter to be matched for collecting fine powder at an air classification outlet, and finally packing and packaging qualified finished products to form the low-temperature curing composite resin powder coating.
In this embodiment, in S2, the mixing time of the polyamide resin and the epoxy resin by the pulverizer and mixer is 30-50 minutes, and the mixing speed is 180-240 r/min.
In this embodiment, in S2, the stirring speed of the mixer for stirring titanium dioxide, calcium carbonate and calcium phosphate is 700-900r/min, and the stirring temperature is 20-25 ℃.
In this example, in S2, the stirring speed of the mixer for stirring mica, barium sulfate, talc powder and diatomaceous earth is 500-700r/min, and the stirring temperature is 15-20 ℃.
In this embodiment, in S3, the stirring speed of the mixer for stirring the iron-titanium powder, the curing agent and the leveling agent is 300-500r/min, and the stirring temperature is 15-20 ℃.
In this example, in S4, the cooling time was 3 to 10 minutes and the cooling temperature was 30 to 50 ℃.
In this embodiment, in S4, the pulverizing time of the fine pulverizer is 15-20 minutes, and the rotation speed of the fine pulverizer is 3000-.
In this embodiment, in S5, the grinding speed of the grinder is 300-.
Example two
A preparation method of low-temperature curing composite resin powder coating comprises the following steps:
s1: preparing 20 parts of polyamide resin, 25 parts of epoxy resin, 10 parts of titanium dioxide, 10 parts of calcium carbonate, 10 parts of calcium phosphate, 8 parts of mica, 10 parts of barium sulfate, 6 parts of talcum powder, 10 parts of diatomite, 10 parts of composite iron-titanium powder, 8 parts of curing agent and 8 parts of flatting agent;
s2: putting polyamide resin and epoxy resin into a crushing stirrer, crushing and mixing the polyamide resin and the epoxy resin by the crushing stirrer to form composite resin powder, putting the composite resin powder into a mixer, sequentially adding titanium dioxide, calcium carbonate and calcium phosphate for stirring for 55 minutes, continuously adding mica, barium sulfate, talcum powder and diatomite into the mixer for stirring and mixing for 35 minutes;
s3: adding the composite iron-titanium powder, the curing agent and the flatting agent into a mixer for stirring, wherein the mixing time is 10 minutes to obtain a composite material, putting the composite material into a single-screw extruder, carrying out melt mixing extrusion on the composite material by the single-screw extruder, and setting the temperature in the single-screw extruder to be 90 ℃;
s4: the melt extruded by the single-screw extruder is immediately extruded into a sheet and cooled to avoid heat accumulation in the melt so as to prevent chemical changes in the components from affecting the quality of the product, and then a fine crusher is used for crushing the extruded material;
s5: feeding the crushed powder particles into a grinding machine, grinding the crushed material by the grinding machine, feeding the crushed material into a cyclone separation or rotary cylinder by wind power to achieve classification, sieving the classified material by a 150-mesh sieve, and collecting a product;
s6: and (3) using a cyclone separator and a side filter to be matched for collecting fine powder at an air classification outlet, and finally packing and packaging qualified finished products to form the low-temperature curing composite resin powder coating.
In this example, in S2, the mixing time of the polyamide resin and the epoxy resin by the pulverizer was 40 minutes, and the stirring speed was 200 r/min.
In this example, in S2, the stirring speed of the mixer for stirring titanium white, calcium carbonate and calcium phosphate was 700r/min, and the stirring temperature was 20 ℃.
In this example, in S2, the stirring speed of the mixer for stirring mica, barium sulfate, talc and diatomaceous earth was 650r/min, and the stirring temperature was 20 ℃.
In this example, in S3, the stirring speed of the mixer for stirring the ferrotitanium powder, the curing agent, and the leveling agent was 400r/min, and the stirring temperature was 15 ℃.
In this example, in S4, the cooling time was 5 minutes, and the cooling temperature was 45 ℃.
In this example, in S4, the pulverizing time of the fine pulverizer was 20 minutes, and the rotation speed of the fine pulverizer was 4500 r/min.
In this example, in S5, the grinding speed of the grinder was 400r/min, and the grinding time was 25 minutes.
Compared with the prior art, the invention has the technical progress that: the preparation process of the invention has good crushing effect on materials, improves grinding efficiency, improves preparation speed, has good corrosion prevention effect, has a particularly narrow softening point range of the composite resin powder coating, does not have a gradual curing or softening process unlike other thermoplastic resins, can be rapidly cured when the temperature is slightly lower than the melting point, has good drug resistance, can resist acid, alkali and vegetable oil, can ensure that the epoxy resin has excellent caking property, flexibility, toughness, chemical resistance, moisture resistance and surface smoothness, has excellent properties of flexibility, chemical resistance, salt corrosion resistance, impact resistance, high gloss and the like, is widely used as a surface coating, has low melting temperature of the low-temperature cured composite resin powder coating, and can ensure that the composite powder coating realizes melt leveling under the low-temperature condition.
Claims (8)
1. The preparation method of the low-temperature curing composite resin powder coating is characterized by comprising the following steps of:
s1: preparing 10-20 parts of polyamide resin, 15-25 parts of epoxy resin, 5-10 parts of titanium dioxide, 5-10 parts of calcium carbonate, 5-10 parts of calcium phosphate, 3-8 parts of mica, 5-10 parts of barium sulfate, 4-6 parts of talcum powder, 5-10 parts of kieselguhr, 5-10 parts of composite ferrotitanium powder, 6-8 parts of a curing agent and 3-8 parts of a flatting agent;
s2: putting polyamide resin and epoxy resin into a crushing stirrer, crushing and mixing the polyamide resin and the epoxy resin by the crushing stirrer to form composite resin powder, putting the composite resin powder into a mixer, sequentially adding titanium dioxide, calcium carbonate and calcium phosphate for stirring for 40-60 minutes, continuously adding mica, barium sulfate, talcum powder and diatomite into the mixer for stirring and mixing for 30-40 minutes;
s3: adding the composite iron-titanium powder, the curing agent and the flatting agent into a mixer for stirring for 10-20 minutes to obtain a composite material, putting the composite material into a single-screw extruder, carrying out melt mixing extrusion on the composite material by the single-screw extruder, and setting the temperature in the single-screw extruder to be 85-95 ℃;
s4: the melt extruded by the single-screw extruder is immediately extruded into a sheet and cooled to avoid heat accumulation in the melt so as to prevent chemical changes in the components from affecting the quality of the product, and then a fine crusher is used for crushing the extruded material;
s5: sending the crushed powder particles into a grinding machine, grinding the crushed material by the grinding machine, sending the crushed material into a cyclone separation or rotary cylinder by wind power to achieve classification, sieving the crushed material by a 120-mesh sieve and a 150-mesh sieve, and then collecting the product;
s6: and (3) using a cyclone separator and a side filter to be matched for collecting fine powder at an air classification outlet, and finally packing and packaging qualified finished products to form the low-temperature curing composite resin powder coating.
2. The method as claimed in claim 1, wherein in S2, the mixing time of the polyamide resin and the epoxy resin by the pulverizer is 30-50 minutes, and the stirring speed is 180-240 r/min.
3. The method as claimed in claim 1, wherein the stirring speed of the mixer for stirring the titanium white, the calcium carbonate and the calcium phosphate in S2 is 700-900r/min, and the stirring temperature is 20-25 ℃.
4. The method as claimed in claim 1, wherein in S2, the stirring speed of the mixer for stirring mica, barium sulfate, talc powder and diatomite is 700r/min, and the stirring temperature is 15-20 ℃.
5. The method as claimed in claim 1, wherein in S3, the stirring speed of the mixer for stirring the ferrotitanium powder, the curing agent and the leveling agent is 300-500r/min, and the stirring temperature is 15-20 ℃.
6. The method for preparing a low-temperature curing composite resin powder coating as claimed in claim 1, wherein in the step S4, the cooling time is 3-10 minutes, and the cooling temperature is 30-50 ℃.
7. The method as claimed in claim 1, wherein in S4, the pulverizing time of the fine pulverizer is 15-20 minutes, and the rotation speed of the fine pulverizer is 3000-5000 r/min.
8. The method as claimed in claim 1, wherein in S5, the grinding speed of the grinder is 300-500r/min, and the grinding time is 20-30 min.
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Citations (6)
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| CN102492353A (en) * | 2011-11-28 | 2012-06-13 | 江苏兰陵高分子材料有限公司 | Novel fast-set anticorrosion and wear-resistant epoxy powder coating and preparation process thereof |
| CN102964779A (en) * | 2012-12-10 | 2013-03-13 | 常熟建工建设集团有限公司苏州分公司 | Energy-saving epoxy resin glass fiber reinforced plastic for buildings |
| CN108047701A (en) * | 2017-12-29 | 2018-05-18 | 定远县丹宝树脂有限公司 | A kind of corrosion-resistant polyamide and preparation method thereof |
| CN109266188A (en) * | 2018-08-24 | 2019-01-25 | 广东鑫皇冠新材料有限公司 | A kind of anticorrosion water paint and preparation method thereof |
| CN109280466A (en) * | 2018-09-17 | 2019-01-29 | 常州市源长新材料科技有限公司 | A kind of low temperature thermal boundary powdery paints and preparation method thereof |
| CN110041810A (en) * | 2019-04-23 | 2019-07-23 | 江苏海獭新材料科技有限公司 | A kind of preparation method of low-temperature setting compound resin powdery paints |
-
2020
- 2020-12-08 CN CN202011421806.XA patent/CN112552787A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492353A (en) * | 2011-11-28 | 2012-06-13 | 江苏兰陵高分子材料有限公司 | Novel fast-set anticorrosion and wear-resistant epoxy powder coating and preparation process thereof |
| CN102964779A (en) * | 2012-12-10 | 2013-03-13 | 常熟建工建设集团有限公司苏州分公司 | Energy-saving epoxy resin glass fiber reinforced plastic for buildings |
| CN108047701A (en) * | 2017-12-29 | 2018-05-18 | 定远县丹宝树脂有限公司 | A kind of corrosion-resistant polyamide and preparation method thereof |
| CN109266188A (en) * | 2018-08-24 | 2019-01-25 | 广东鑫皇冠新材料有限公司 | A kind of anticorrosion water paint and preparation method thereof |
| CN109280466A (en) * | 2018-09-17 | 2019-01-29 | 常州市源长新材料科技有限公司 | A kind of low temperature thermal boundary powdery paints and preparation method thereof |
| CN110041810A (en) * | 2019-04-23 | 2019-07-23 | 江苏海獭新材料科技有限公司 | A kind of preparation method of low-temperature setting compound resin powdery paints |
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