CN112480794A - Mixed extinction powder coating and preparation method thereof - Google Patents
Mixed extinction powder coating and preparation method thereof Download PDFInfo
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- CN112480794A CN112480794A CN202011395547.8A CN202011395547A CN112480794A CN 112480794 A CN112480794 A CN 112480794A CN 202011395547 A CN202011395547 A CN 202011395547A CN 112480794 A CN112480794 A CN 112480794A
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- powder coating
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- extinction
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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
-
- 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
- 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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The invention provides a mixed extinction powder coating and a preparation method thereof. The coating comprises 28 to 39 weight percent of polyester resin, 23 to 34 weight percent of epoxy resin, 20 to 30 weight percent of titanium dioxide, 10 to 25 weight percent of filler, 1 to 10 weight percent of acrylic resin with carboxyl functional groups, 0.5 to 2 weight percent of flatting agent and 2 to 3 weight percent of other auxiliary agents. The acrylic resin with carboxyl functional groups is added into the mixed extinction powder coating, the acrylic resin can endow the coating with a fine extinction plane effect, the selection range of the extinction agent to the polyester resin is increased, and the prepared coating has a solvent-resistant, acid-resistant and alkali-resistant high-hardness coating. Furthermore, the preparation method of the mixed extinction powder coating is simple and easy to implement, green and environment-friendly, and is an environment-friendly preparation process.
Description
Technical Field
The application relates to a mixed extinction powder coating, in particular to a mixed extinction powder coating and a preparation method thereof, belonging to the field of coatings.
Background
The matting effect of the matting agent is mainly caused by poor compatibility between the matting agent and the film-forming material, and is mainly a physical effect. The extinction principle of extinction curing agent is that two reaction systems of curing agent with different reactivity in powder coating formula are utilized, one of the reaction systems has high curing reactivity and high reaction speed, the other reaction system has low curing reactivity and low reaction speed, and the reaction speed difference between the two film-forming material reaction systems and the compatibility difference between the two products form an extinction coating film with microscopically rough surface and diffuse reflection and scattering of light and poor reflection. In the curing reaction, two reaction systems generate interpenetrating network structures, so that the film coating generates extinction effect. In the prior art, the extinction effect of the extinction agent in the extinction powder coating is greatly influenced by the variety of the polyester resin, so the use of the variety of the polyester is limited, and even if a polyester resin which is matched with the extinction agent is selected, the gloss fluctuation of a coating film is large in the process of actual production in a test due to the fluctuation of the value of the polyester resin, and the quality of the produced extinction powder is not stable. Therefore, it is an urgent problem to provide a matting powder coating which expands the variety selectivity of polyester and has stable film gloss.
Disclosure of Invention
The invention aims to provide a mixed extinction powder coating and a preparation method thereof, which overcome the defects of limitation on the variety selectivity of polyester and unstable film gloss in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
the mixed extinction powder coating comprises the following components in percentage by weight:
optionally, the upper limit of the mass fraction of the polyester resin is selected from 30 wt%, 31 wt%, 32 wt%, 33 wt%, 340 wt%, 35 wt%, 36 wt%, 37 wt%, 38 wt%, 39 wt%; the lower limit of the mass fraction of the polyester resin is selected from the group consisting of 28 wt%, 30 wt%, 31 wt%, 32 wt%, 33 wt%, 340 wt%, 35 wt%, 36 wt%, 37 wt%, 38 wt%.
Optionally, the upper mass fraction limit of the epoxy resin is selected from 24 wt%, 25 wt%, 26 wt%, 27 wt%, 28 wt%, 29 wt%, 30 wt%, 31 wt%, 32 wt%, 33 wt%, 34 wt%; the lower limit of the mass fraction of the epoxy resin is selected from 23 wt%, 24 wt%, 25 wt%, 26 wt%, 27 wt%, 28 wt%, 29 wt%, 30 wt%, 31 wt%, 32 wt%, 33 wt%, 34 wt%.
Optionally, the upper limit of the mass fraction of the titanium dioxide is selected from 21 wt%, 22 wt%, 23 wt%, 24 wt%, 25 wt%, 26 wt%, 27 wt%, 28 wt%, 29 wt%, 30 wt%; the lower limit of the mass fraction of the titanium dioxide is selected from 20 wt%, 21 wt%, 22 wt%, 23 wt%, 24 wt%, 25 wt%, 26 wt%, 27 wt%, 28 wt% and 29 wt%.
Optionally, the upper mass fraction limit of the filler is selected from 15 wt%, 20 wt%, 25 wt%; the lower limit of the mass fraction of the filler is selected from 10 wt%, 15 wt%, 20 wt%.
Optionally, the upper mass fraction limit of the matting agent is selected from 0.8 wt%, 1.0 wt%, 1.2 wt%, 1.4 wt%, 1.6 wt%, 1.8 wt%, 2.0 wt%; the lower limit of the mass fraction of the flatting agent is selected from 0.5 wt%, 0.8 wt%, 1.0 wt%, 1.2 wt%, 1.4 wt%, 1.6 wt%, 1.8 wt%.
Optionally, the acrylic resin with carboxyl functional groups is obtained by copolymerizing a carboxyl-containing monomer and a (meth) acrylic acid monomer.
Optionally, the carboxyl group-containing monomer is selected from at least one of acrylic resin (meth) acrylic acid and maleic acid.
Alternatively, the acrylic resin with carboxyl functional groups is reacted with an oxygen-containing compound to produce a high hardness coating.
Optionally, the oxygen-containing compound is selected from epoxy resins.
Alternatively, the polyester resin has an acid value in the range of 30 to 75 mgKOH/g.
Optionally, the polyester resin is selected from at least one of model numbers SJ3B, SJ6408 and SJ6B of new material ltd.
Optionally, the auxiliary agent is selected from at least one of wear-resistant wax and an electric conduction agent.
Optionally, the coating further comprises a filler.
Optionally, the filler is selected from barium sulfate.
The preparation method of the mixed type extinction powder coating comprises the following steps:
(1) providing each component weighed according to a proportion as a processing material;
(2) putting the processed materials into a high-speed mixing tank, and mixing the materials at high speed for 3-6 min;
(3) and carrying out melt extrusion treatment on the mixed materials, and then carrying out tabletting, coarse crushing and ACM fine crushing and grading treatment to obtain the mixed extinction powder coating.
Optionally, the melt extrusion process is: and extruding the mixed material by adopting a double screw.
Alternatively, the extrusion treatment is performed using an extruder.
Optionally, the temperature of the front section of the extruder treatment is 95-105 ℃.
Optionally, the temperature of the rear section of the extruder treatment is 110-130 ℃.
Optionally, the twin-screw speed is 35 hZ-45 hZ.
Optionally, the rotating speed of the high-speed mixing tank is 200 r/min.
The mixed extinction powder coating is applied to cold-rolled steel plates.
The polyester resin and the epoxy resin in the present application are film-forming substances.
The acrylic resins in this application impart a lower gloss to the coating.
The matting agents in the present application impart a lower gloss to the coating.
The use of the leveling agent, the brightener and the benzoin in the embodiment of the application can obtain the flat and smooth appearance of the coating, and avoid the defects of fine pinholes or pig hair holes and the like in the coating.
Compared with the prior art, the invention has the advantages that: the acrylic resin with carboxyl functional groups is added into the mixed extinction powder coating, the acrylic resin can endow the coating with a fine extinction plane effect, the selection range of the extinction agent to the polyester resin is increased, and the prepared coating has a solvent-resistant, acid-resistant and alkali-resistant high-hardness coating. Furthermore, the preparation method of the mixed extinction powder coating is simple and easy to implement, green and environment-friendly, and is an environment-friendly preparation process.
Detailed Description
In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
The technical solution of the present invention is further explained below with reference to several examples.
Epoxy resin: e-12, Meijia New materials Ltd, Anhui
Polyester resin: SJ3B, SJ6408, SJ6B, Anhui Huangshan Shenjian New materials Co., Ltd
Acrylic resin: RB-8160, Wuhan Rong Bang Huatai science and technology Co., Ltd
Extinction curing agent: x-201, Wuhan Rong Bangtai science and technology Co., Ltd
In the examples 1-3, 3 kinds of polyester resins with different acid values are selected as experimental objects, and for the convenience of coating performance test and comparison, the same type of solid epoxy resin is used as a base material.
The other components are commercially available.
Example 1
The components are mixed according to the mass ratio
Polyester resin model SJ3B 280g, epoxy E-12340 g, flatting agent 10g, brightener 10g, benzoin 4g, titanium dioxide 220g, barium sulfate 200g, acrylic resin RB-8160200 g with carboxyl functional groups, extinction curing agent 10g and PE wax 5 g.
The preparation method of the mixed type extinction powder coating comprises the following steps:
(1) providing each component weighed according to a proportion as a processing material;
(2) putting the processed materials into a high-speed mixing tank, and mixing the materials at high speed for 3-6 min;
(3) and carrying out melt extrusion treatment on the mixed materials, and then carrying out tabletting, coarse crushing and ACM fine crushing and grading treatment to obtain the mixed extinction powder coating.
The melt extrusion treatment process comprises the following steps: and extruding the mixed material by adopting a double screw.
And (4) extruding by using an extruder.
The temperature of the front section treated by the extruder is 95-105 ℃.
The temperature of the rear section of the extruder is 110-130 ℃.
The rotating speed of the twin-screw is 35 hZ-45 hZ.
The rotating speed of the high-speed mixing tank is 200 r/min.
Example 2
The components are mixed according to the mass ratio
Polyester resin model SJ3B 335g, epoxy E-12285 g, leveling agent 10g, brightener 10g, benzoin 4g, titanium dioxide 220g, barium sulfate 200g, acrylic resin RB-8160200 g with carboxyl functional groups, extinction curing agent 10g and PE wax 5 g.
The preparation method of the mixed type extinction powder coating comprises the following steps:
(1) providing each component weighed according to a proportion as a processing material;
(2) putting the processed materials into a high-speed mixing tank, and mixing the materials at high speed for 3-6 min;
(3) and carrying out melt extrusion treatment on the mixed materials, and then carrying out tabletting, coarse crushing and ACM fine crushing and grading treatment to obtain the mixed extinction powder coating.
The melt extrusion treatment process comprises the following steps: and extruding the mixed material by adopting a double screw.
And (4) extruding by using an extruder.
The temperature of the front section treated by the extruder is 95-105 ℃.
The temperature of the rear section of the extruder is 110-130 ℃.
The rotating speed of the twin-screw is 35 hZ-45 hZ.
The rotating speed of the high-speed mixing tank is 200 r/min.
Example 2
The components are mixed according to the mass ratio
Polyester resin model SJ3B 335g, epoxy E-12285 g, leveling agent 10g, brightener 10g, benzoin 4g, titanium dioxide 220g, barium sulfate 200g, acrylic resin RB-816050 g with carboxyl functional groups, extinction curing agent 10g and PE wax 5 g.
The preparation method of the mixed type extinction powder coating comprises the following steps:
(1) providing each component weighed according to a proportion as a processing material;
(2) putting the processed materials into a high-speed mixing tank, and mixing the materials at high speed for 3-6 min;
(3) and carrying out melt extrusion treatment on the mixed materials, and then carrying out tabletting, coarse crushing and ACM fine crushing and grading treatment to obtain the mixed extinction powder coating.
The melt extrusion treatment process comprises the following steps: and extruding the mixed material by adopting a double screw.
And (4) extruding by using an extruder.
The temperature of the front section treated by the extruder is 95-105 ℃.
The temperature of the rear section of the extruder is 110-130 ℃.
The rotating speed of the twin-screw is 35 hZ-45 hZ.
The rotating speed of the high-speed mixing tank is 200 r/min.
Example 3
The components are mixed according to the mass ratio
Polyester resin model SJ3B 390g, epoxy E-12230 g, leveling agent 10g, brightener 10g, benzoin 4g, titanium dioxide 220g, barium sulfate 200g, acrylic resin RB-816050 g with carboxyl functional groups, extinction curing agent 10g and PE wax 5 g.
The preparation method of the mixed type extinction powder coating comprises the following steps:
(1) providing each component weighed according to a proportion as a processing material;
(2) putting the processed materials into a high-speed mixing tank, and mixing the materials at high speed for 3-6 min;
(3) and carrying out melt extrusion treatment on the mixed materials, and then carrying out tabletting, coarse crushing and ACM fine crushing and grading treatment to obtain the mixed extinction powder coating.
The melt extrusion treatment process comprises the following steps: and extruding the mixed material by adopting a double screw.
And (4) extruding by using an extruder.
The temperature of the front section treated by the extruder is 95-105 ℃.
The temperature of the rear section of the extruder is 110-130 ℃.
The rotating speed of the twin-screw is 35 hZ-45 hZ.
The rotating speed of the high-speed mixing tank is 200 r/min.
The mixed extinction powder coating prepared in the embodiment 1 to the embodiment 3 is used for a cold-rolled steel plate, specifically, after the cold-rolled steel plate with the thickness of 150mm multiplied by 70mm multiplied by 0.5mm is subjected to oil removal, rust removal and phosphating treatment, a high-voltage electrostatic spray gun is adopted for spraying the plate, the electrostatic pressure of the spraying is 60-80kv, the conveying pressure is 0.4-0.6Mpa, the curing condition is 200 ℃ and the time is 10min, then the test plate is taken out and cooled to the room temperature, and finally, the performance test is carried out on the coating film, and the results are shown in the table 1.
TABLE 1 Mixed matting powder coating for cold rolled steel sheet Performance test
As is clear from Table 1, when the hybrid matte powder coating of the present application is applied to cold-rolled steel sheets, the gloss of the films does not change greatly when polyester resins having different acid values are used. The method for preparing the extinction powder coating by adopting the extinction of the acrylic resin has low requirement on the matching property of the polyester and the extinction agent, and can greatly improve the flexibility of the extinction powder formula.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and therefore, the protection scope of the present invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The mixed extinction powder coating is characterized by comprising the following components in percentage by weight:
2. the hybrid matted powder coating of claim 1, wherein the carboxyl functional acrylic resin is a copolymer of a carboxyl-containing monomer and a (meth) acrylic acid vinyl monomer;
preferably, the carboxyl group-containing monomer is selected from at least one of acrylic resin (meth) acrylic acid and maleic acid;
preferably, the acrylic resin with carboxyl functional groups reacts with an oxygen-containing compound to produce a high-hardness coating;
preferably, the oxygen-containing compound is selected from epoxy resins.
3. The hybrid matted powder coating of claim 1, wherein the polyester resin has an acid value ranging from 30 to 75 mgKOH/g.
4. The hybrid matted powder coating of claim 1, wherein the polyester resin is selected from at least one of the new Anhui Huangshan Shenjian materials, Inc. model Nos. SJ3B, SJ6408, and SJ 6B.
5. The hybrid matted powder coating of claim 1, wherein the adjuvant is selected from at least one of an abrasion resistant wax, a charge enhancer.
6. The hybrid matted powder coating of claim 1, wherein the coating further comprises a filler;
preferably, the filler is selected from barium sulphate.
7. A method of preparing a hybrid matte powder coating where required of any of claims 1-6, comprising the steps of:
(1) providing each component weighed according to a proportion as a processing material;
(2) putting the processed materials into a high-speed mixing tank, and mixing the materials at high speed for 3-6 min;
(3) and carrying out melt extrusion treatment on the mixed materials, and then carrying out tabletting, coarse crushing and ACM fine crushing and grading treatment to obtain the mixed extinction powder coating.
8. The method for preparing the hybrid matte powder coating according to claim 7, wherein the melt extrusion process comprises: extruding the mixed material by adopting a double screw;
preferably, an extruder is used for extrusion treatment;
preferably, the temperature of the front section of the extruder treatment is 95-105 ℃;
preferably, the temperature of the rear section of the extruder treatment is 110-130 ℃;
preferably, the rotating speed of the twin screw is 35 hZ-45 hZ.
9. The method of claim 7 wherein the high speed mixing bowl is rotated at a speed of 200 rpm.
10. Use of the hybrid matte powder coating of any one of claims 1-6 or the hybrid matte powder coating made according to any one of claims 7-9 in cold rolled steel sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011395547.8A CN112480794A (en) | 2020-12-03 | 2020-12-03 | Mixed extinction powder coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011395547.8A CN112480794A (en) | 2020-12-03 | 2020-12-03 | Mixed extinction powder coating and preparation method thereof |
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| CN112480794A true CN112480794A (en) | 2021-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115232540A (en) * | 2022-08-03 | 2022-10-25 | 珑彩环保材料(苏州)有限公司 | High-imitation electroplated silver metal powder coating and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108727530A (en) * | 2017-04-21 | 2018-11-02 | 武汉荣邦华泰科技有限公司 | High acid value carboxy acrylic matting resin and epoxy polyester type powdery paints containing it |
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2020
- 2020-12-03 CN CN202011395547.8A patent/CN112480794A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108727530A (en) * | 2017-04-21 | 2018-11-02 | 武汉荣邦华泰科技有限公司 | High acid value carboxy acrylic matting resin and epoxy polyester type powdery paints containing it |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115232540A (en) * | 2022-08-03 | 2022-10-25 | 珑彩环保材料(苏州)有限公司 | High-imitation electroplated silver metal powder coating and preparation method and application thereof |
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Application publication date: 20210312 |
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