CN111978774A - Flame-retardant powder coating and preparation method thereof - Google Patents
Flame-retardant powder coating and preparation method thereof Download PDFInfo
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- CN111978774A CN111978774A CN202010902465.1A CN202010902465A CN111978774A CN 111978774 A CN111978774 A CN 111978774A CN 202010902465 A CN202010902465 A CN 202010902465A CN 111978774 A CN111978774 A CN 111978774A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- 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
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2251—Oxides; Hydroxides of metals of chromium
-
- 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
- C08K2003/2255—Oxides; Hydroxides of metals of molybdenum
-
- 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
-
- 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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention discloses a flame-retardant powder coating and a preparation method thereof, wherein the flame-retardant powder coating comprises the following components in parts by mass: the paint comprises the following components in parts by mass: 20-30 parts of epoxy resin, 34-45 parts of polyester resin, 2-4 parts of flame retardant and 20-25 parts of filler, wherein the flame retardant is one or two of 749 flame retardant and 759 flame retardant. The preparation method comprises the following steps: (1) mixing and stirring epoxy resin, a polyester resin material, a flame retardant and a filler, and extruding the mixture into a lump material shape by using an extruder to obtain a lump mixture; (2) and crushing the blocky mixture to obtain the flame-retardant powder coating. The flame-retardant powder coating disclosed by the invention is low in production cost, safe and pollution-free, and has a good flame-retardant effect, and the flame-retardant grade can reach B1-A grade; the preparation method of the flame-retardant powder coating is simple and easy to implement, does not need complex equipment and instruments, has no pollution in the process, and is suitable for industrial production.
Description
Technical Field
The invention relates to the field of powder coatings, and particularly relates to a flame-retardant powder coating and a preparation method thereof.
Background
With the development of society and economy, the requirements of the nation, enterprises and the public on environmental protection and fire protection consciousness are higher and higher, the requirements of the powder coating on heat resistance and fire resistance are improved, and particularly, building materials and decorative materials in some public places have the effects of safety, fire protection and flame retardance. At present, the market products are numerous, but the existing products cannot meet the requirements of the market on flame retardant powder coating, such as flame retardance, environmental protection and price for the citizen, so that research and development work on safe, environment-friendly, fireproof and flame retardant powder coating products is urgently needed in order to better expand demand users.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects in the prior art and providing the flame-retardant powder coating and the preparation method thereof, wherein the flame-retardant powder coating has the advantages of low production cost, safety, no pollution, long-acting and good flame-retardant effect; the preparation method of the flame-retardant powder coating is simple and easy to implement, does not need complex equipment and instruments, has no pollution in the process, and is suitable for industrial production.
In order to solve the technical problems, the invention adopts the following technical scheme:
the flame-retardant powder coating comprises the following components in parts by mass: 20-30 parts of epoxy resin, 34-45 parts of polyester resin, 2-4 parts of flame retardant and 20-25 parts of filler, wherein the flame retardant is one or two of the commercial codes 749 and 759 produced by Guangzhou Tianlong high polymer material science and technology limited company.
The design idea of the technical scheme is that the inventor researches and experiments to find that the flame retardant 749 or 759 can obviously improve the oxidation resistance of the coating and the flame retardant property of a coating when being used in the field of powder coating, particularly in a coating system formed by epoxy resin and polyester resin, so that the flame retardant grade of the coating reaches B1 grade, the production cost and the production pollution are obviously reduced, and the practical application and development of the flame retardant powder coating are facilitated.
Preferably, the flame-retardant powder coating further comprises 0.6-4 parts of a halogen flame retardant. The research and experiment of the inventor show that the flame retardant 749 or 759 is used for forming a blocky mixture by internal extrusion and then is mixed with the halogen flame retardant, so that the flame retardant performance of the flame-retardant powder coating and the flame-retardant coating thereof can be obviously improved, and the flame retardant performance is improved to A level.
Preferably, the flame-retardant powder coating further comprises 1.25-1.8 parts by mass of an auxiliary agent, wherein the auxiliary agent is one or more of a leveling agent, an anti-wear agent and benzoin calcium carbonate. The leveling agent can increase the fluidity of the coating in a molten state, can make the surface tension of the coating more uniform, and can reduce the interfacial tension between the molten coating and the substrate (and the filler), thereby improving the flatness of the coating; the benzoin can eliminate bubbles in the molten powder coating and ensure the smoothness of the coating; the wear-resisting agent can improve the wear-resisting property of the flame-retardant powder coating film and ensure the long-term use of the coating.
Preferably, the filler is one or two of calcium carbonate and titanium dioxide. The calcium carbonate is used as a filler of a coating product, has certain dry covering power, can partially replace a flatting agent, saves cost, is a white inorganic pigment, can be matched with titanium dioxide for use, and reduces cost. The titanium dioxide can be used together with calcium carbonate to adjust the color of the powder coating and improve the tolerance of the coating film of the coating.
Preferably, the flame-retardant powder coating further comprises 8-9.5 parts by mass of pigment and filler. The color filler can adjust the color of the powder coating and play a role in beauty.
Preferably, the pigment filler is a composition of molybdenum chrome red and high-gloss barium sulfate. The addition of the molybdenum chrome red can adjust the color of the powder coating, improve the tolerance of a coating film of the coating, simultaneously improve the glossiness of the coating by highlight barium sulfate, and bring good wear resistance and weather resistance to the powder coating.
Preferably, the particle size of the flame-retardant powder coating is 90-110 μm. The particle size of the flame retardant powder coating is determined based on the following considerations: firstly, the smaller the particle size of the powder is, the better the leveling property of the coating during curing is, and the smoother and smoother the appearance of the coating film is, but the electrification of the powder is in direct proportion to the square of the particle size, the electrification of the powder is reduced when the powder is too fine, the coating construction efficiency is reduced, and the ultra-fine powder (the particle size is less than 10 microns) is basically uncharged. Secondly, the powder loading rate has an important relationship with the charging performance of the powder coating. The charging quantity of the coating particles is improved, the powdering rate can be improved by increasing the particle size, but the particle size cannot be too large, the particle size is too large, the gravity action of the coating particles exceeds the aerodynamic force and the electrostatic force, and the powdering rate is reduced. Finally, recovery rate powder coating has problems in recovering powder both during production and use, and in general, recovery rate of ultra-fine powder having a powder particle size of less than 10 μm is low, recovery rate of powder coating rapidly rises when the powder particle size is more than 10 μm, and recovery rate of powder increases as the particle size increases. The particle size range of the flame-retardant powder can ensure that the flame-retardant powder coating film has smooth appearance, and the powdering rate and the recovery rate are both at a higher level.
Based on the same technical concept, the invention also provides a preparation method of the flame-retardant powder coating, which comprises the following steps:
(1) mixing and stirring epoxy resin, a polyester resin material, a flame retardant and an auxiliary agent, and extruding the mixture into a lump material shape by using an extruder to obtain a lump mixture;
(2) and crushing the blocky mixture to obtain the flame-retardant powder coating.
The technical scheme has the design advantages that the method has simple steps, is convenient to operate, uses common and easily-available equipment, has low production cost and cannot cause adverse effects on the environment.
Preferably, in the step (2), the block mixture is mixed with the halogen flame retardant before being crushed to obtain a mixture, and then the mixture is crushed to obtain the flame-retardant powder coating. According to the invention, the flame retardant property of the prepared flame-retardant powder coating is improved by internal extrusion of the flame retardant 749/or 759 and addition of the halogen flame retardant.
Preferably, the temperature of the extrusion process in the step (1) is controlled to be 95-105 ℃.
Compared with the prior art, the invention has the advantages that:
(1) the flame-retardant powder coating disclosed by the invention is low in production cost, safe and pollution-free, and has a long-acting and good flame-retardant effect, and the flame-retardant grade can reach B1-A level;
(2) the preparation method of the flame-retardant powder coating is simple and easy to implement, does not need complex equipment and instruments, has no pollution in the process, and is suitable for industrial production.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1:
the flame-retardant powder coating comprises the following components in parts by mass: 20 parts of epoxy resin, 44 parts of polyester resin, 0.8 part of flatting agent, 0.24 part of wear-resisting agent, 0.32 part of benzoin, 2.4 parts of flame retardant 759 (produced by Guangzhou Tianlong high polymer material science and technology Co., Ltd.), 4 parts of calcium carbonate, 8 parts of high-gloss barium sulfate, 20 parts of titanium dioxide and 0.24 part of molybdenum chrome red.
The preparation method of the flame-retardant powder coating comprises the following steps:
(1) mixing and stirring the epoxy resin, the polyester resin, the pigment filler, the flame retardant 759 and the auxiliary agent according to the proportion, extruding the mixture into a block shape by using an extruder at a high speed through a spiral operation under the condition of accurate temperature control (the extrusion temperature is 95 ℃), and rapidly cooling the extruded material at a high temperature by using an ice water machine cooling fan and loading the cooled material into a hopper to obtain a block-shaped mixture for later use.
(2) And (3) grinding the blocky mixture into powder at a high speed by a grinder, and controlling the particle size to be 180 meshes to obtain the flame-retardant powder coating.
Example 2:
the flame-retardant powder coating comprises the following components in parts by mass: 23.16 parts of epoxy resin, 38.61 parts of polyester resin, 1.16 parts of flatting agent, 0.23 part of wear-resisting agent, 0.31 part of benzoin, 3.86 parts of flame retardant 759 (produced by Guangzhou Tianlong high polymer material science and technology Co., Ltd.), 0.77 part of halogen flame retardant, 3.86 parts of calcium carbonate, 8.49 parts of high-gloss barium sulfate, 19.31 parts of titanium dioxide and 0.23 part of molybdenum-chromium red.
The preparation method of the flame-retardant powder coating comprises the following steps:
(1) mixing and stirring the epoxy resin, the polyester resin, the pigment filler, the flame retardant 759 and the auxiliary agent according to the proportion, extruding the mixture into a block shape by using an extruder at a high speed through a spiral operation under the condition of accurate temperature control (the extrusion temperature is 100 ℃), and rapidly cooling the extruded material at a high temperature by using an ice water machine cooling fan and loading the cooled material into a hopper to obtain a block-shaped mixture for later use.
(2) Uniformly mixing the block-shaped mixture and the halogen flame retardant, and grinding the mixture into powder at a high speed by a grinder, wherein the particle size is controlled at 170 meshes, so as to obtain the flame-retardant powder coating.
Example 3:
the flame-retardant powder coating comprises the following components in parts by mass: 26.52 parts of epoxy resin, 34.10 parts of polyester resin, 0.76 part of liquid leveling agent, 0.23 part of wear-resisting agent, 0.30 part of benzoin, 3.79 parts of flame retardant 749 (produced by Guangzhou Tianlong high polymer material science and technology Co., Ltd.), 2.27 parts of halogen flame retardant, 3.79 parts of calcium carbonate, 9.09 parts of high-gloss barium sulfate, 18.94 parts of titanium dioxide and 0.23 part of molybdenum-chromium red.
The preparation method of the flame-retardant powder coating comprises the following steps:
(1) mixing and stirring the epoxy resin, the polyester resin, the pigment and filler, the flame retardant 749 and the auxiliary agent according to the proportion, extruding the mixture into a block shape by using an extruder at a high speed through a screw under the condition of accurate temperature control (the extrusion temperature is 105 ℃), and rapidly cooling the extruded material at a high temperature by using an ice water machine cooling fan and loading the cooled material into a hopper to obtain a block-shaped mixture for later use.
(2) And (3) grinding the blocky mixture into powder at a high speed by a grinder, and controlling the particle size to be 180 meshes to obtain the flame-retardant powder coating.
The above examples were tested for performance and the results are shown in table 1:
TABLE 1 Performance parameters of the flame-retardant powder coatings of the examples
| Performance of | Detection standard | Example 1 | Example 2 | Example 3 |
| Hardness of | Mitsubishi pencil | 1H | 2H | 2H |
| Gloss of | 60 degree test | 88％ | 90％ | 90％ |
| Impact resistance | Positive punch 1/2 | 45 | 50 | 50 |
| Flame retardant rating | National standard GB8624-97 | B1 | B1 | Class A |
As can be seen from Table 1, the flame-retardant powder coating of the invention has long-acting and good flame-retardant effect, and the flame-retardant grade can reach B1-A grade.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-described embodiments. Modifications and variations that may occur to those skilled in the art without departing from the spirit and scope of the invention are to be considered as within the scope of the invention.
Claims (10)
1. The flame-retardant powder coating is characterized by comprising the following components in parts by mass: 20-30 parts of epoxy resin, 34-45 parts of polyester resin, 2-4 parts of a flame retardant and 20-25 parts of a filler, wherein the flame retardant is one or two of 749 flame retardants and 759 flame retardants.
2. The flame-retardant powder coating according to claim 1, further comprising 0.6 to 4 parts by mass of a halogen flame retardant.
3. The flame-retardant powder coating of claim 1, further comprising 1.25-1.8 parts by mass of an auxiliary agent, wherein the auxiliary agent is one or more of a leveling agent, a wear-resistant agent and benzoin.
4. The flame retardant powder coating of claim 1 wherein the filler is one or both of calcium carbonate and titanium dioxide.
5. The flame retardant powder coating of claim 1 further comprising 8 to 9.5 parts by weight of a pigment and filler.
6. The flame-retardant powder coating of claim 5, wherein the color filler is one or both of molybdate red and high-gloss barium sulfate.
7. The flame retardant powder coating according to any one of claims 1 to 6, wherein the particle size of the flame retardant powder coating is 90 to 110 μm.
8. A method for preparing the flame retardant powder coating of claim 1, comprising the steps of:
(1) mixing and stirring the epoxy resin, the polyester resin material, the flame retardant and the filler, and extruding the mixture into a lump material shape by using an extruder to obtain a lump mixture;
(2) and crushing the block-shaped mixture to obtain the flame-retardant powder coating.
9. The method for preparing the flame-retardant powder coating according to claim 8, wherein the block-shaped mixture in the step (2) is mixed with the halogen flame retardant to obtain a mixture before being crushed, and then the mixture is crushed to obtain the flame-retardant powder coating.
10. The method of claim 8, wherein the temperature of the extrusion process in step (1) is controlled to be 95-105 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010902465.1A CN111978774A (en) | 2020-09-01 | 2020-09-01 | Flame-retardant powder coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010902465.1A CN111978774A (en) | 2020-09-01 | 2020-09-01 | Flame-retardant powder coating and preparation method thereof |
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| CN202010902465.1A Withdrawn CN111978774A (en) | 2020-09-01 | 2020-09-01 | Flame-retardant powder coating and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112680059A (en) * | 2020-12-19 | 2021-04-20 | 江南载福粉末涂料（张家港）有限公司 | Insulating flame-retardant powder coating |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003055434A (en) * | 2001-08-15 | 2003-02-26 | Toto Kasei Co Ltd | Flame retardant for synthetic resin, and flame- retardant resin composition containing the flame retardant |
| CN103965737A (en) * | 2014-05-09 | 2014-08-06 | 福建万安实业有限公司 | Flame retardant powder coating |
| CN109207018A (en) * | 2018-08-24 | 2019-01-15 | 六安捷通达新材料有限公司 | A kind of high-performance refractory powdery paints |
-
2020
- 2020-09-01 CN CN202010902465.1A patent/CN111978774A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003055434A (en) * | 2001-08-15 | 2003-02-26 | Toto Kasei Co Ltd | Flame retardant for synthetic resin, and flame- retardant resin composition containing the flame retardant |
| CN103965737A (en) * | 2014-05-09 | 2014-08-06 | 福建万安实业有限公司 | Flame retardant powder coating |
| CN109207018A (en) * | 2018-08-24 | 2019-01-15 | 六安捷通达新材料有限公司 | A kind of high-performance refractory powdery paints |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112680059A (en) * | 2020-12-19 | 2021-04-20 | 江南载福粉末涂料（张家港）有限公司 | Insulating flame-retardant powder coating |
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