CN112442311A - Thermosetting powder coating and preparation method thereof - Google Patents
Thermosetting powder coating and preparation method thereof Download PDFInfo
- Publication number
- CN112442311A CN112442311A CN201910809609.6A CN201910809609A CN112442311A CN 112442311 A CN112442311 A CN 112442311A CN 201910809609 A CN201910809609 A CN 201910809609A CN 112442311 A CN112442311 A CN 112442311A
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- powder
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- powder coating
- thermosetting powder
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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
- 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
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
-
- 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
-
- 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)
- Plant Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
The invention discloses a thermosetting powder coating and a preparation method thereof, wherein polyester resin, calcium carbonate, bentonite, zeolite powder, mica powder, a sodium agent, aluminum oxide, solid acrylic resin, a flatting agent, a pigment and a defoaming agent are used as raw materials in reasonable proportion.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a thermosetting powder coating and a preparation method thereof.
Background
The powder coating is a completely different form from general coating, and it exists in a state of fine powder, and since no solvent is used, it is called powder coating, also called solvent-free coating. The paint has the characteristics of no solvent, no pollution, recoverability, environmental protection, energy and resource saving, labor intensity reduction, high mechanical strength of a coating film and the like. The coating can only complete the spraying effect by one construction mode of electric spraying.
Powder coatings are divided into two main categories according to use and performance: namely thermoplastic powder coatings (PE) and thermosetting powder coatings. Thermosetting powder coating is a hard coating which is not melted after thermosetting resin is used as a film forming substance and a curing agent for crosslinking reaction is added and heated. The further increase in temperature does not soften the coating as much as the thermoplastic coating, but only decomposes. Because the resin adopted by the thermosetting powder coating is a prepolymer with lower polymerization degree and lower molecular weight, the leveling layer of the coating is good, the coating has better decoration, and the prepolymer with low molecular weight can form reticular cross-linked macromolecules after being cured, so the coating has better corrosion resistance and mechanical property. Therefore, the development of thermosetting powder coating is particularly rapid under the current environment-friendly and safe situation. With the development of society, powder coatings are required to have higher stability, and especially the weather resistance of the powder coatings is widely concerned. Weather resistance is the test of the outdoor weather resistance of the coating, such as comprehensive damage caused by illumination, cold and heat, wind and rain, bacteria and the like, and the tolerance capability is called weather resistance.
Disclosure of Invention
In view of the above, the present invention provides a thermosetting powder coating and a preparation method thereof, wherein the thermosetting powder coating has super weatherability.
The invention adopts the specific technical scheme that:
a thermosetting powder coating is prepared from the following raw materials in parts by weight: 30-40 parts of polyester resin, 12-15 parts of calcium carbonate, 5-10 parts of bentonite, 3-5 parts of zeolite powder, 3-5 parts of mica powder, 0.2-0.6 part of sodiumizing agent, 0.2-0.5 part of low molecular chitosan, 0.2-0.5 part of gelatinized starch, 0.2-0.4 part of alumina, 0.3-0.5 part of solid acrylic resin, 0.1-0.3 part of flatting agent, 1-2 parts of pigment and 0.2-0.6 part of defoaming agent.
Preferably, the leveling agent is polysiloxane or silicon dioxide.
Preferably, the pigment is organic pigment powder.
Preferably, the antifoaming agent is sodium carbonate.
Preferably, the particle size of the calcium carbonate, the bentonite, the zeolite powder and the mica powder is 200-300 meshes.
Preferably, the particle size of the sodium reagent is 200-300 meshes.
Correspondingly, the invention also provides a preparation method of the thermosetting powder coating, which comprises the following steps: putting polyester resin, calcium carbonate, bentonite, zeolite powder, mica powder, a sodium agent, alumina, solid acrylic resin, a leveling agent, pigment and a defoaming agent which are weighed according to the weight ratio into a mixing tank for premixing, and then carrying out hot melt extrusion by a double-screw extruder; then rapidly cooling the pressed tablet extruded by the cooling tablet press; and finally grinding the cooled tablet into powder.
Preferably, the premixing time is 15-20 min.
Preferably, the rotating speed of the double-screw extruder is 200r/min, and the temperature condition is 110-120 ℃.
The invention has the beneficial effects that: the invention takes polyester resin, calcium carbonate, bentonite, zeolite powder, mica powder, sodiumizing agent, alumina, solid acrylic resin, flatting agent, pigment and defoaming agent as raw materials in reasonable proportion, wherein the bentonite has cohesiveness and adsorbability; the sodium agent can enhance the adsorption effect of the bentonite; the zeolite powder and the calcium carbonate have the sterilization effect, and the mica powder is acid-base resistant, ageing resistant and has a good shielding function on ultraviolet rays; the low molecular chitosan has moisture retention, the gelatinized starch is easy to adhere to dust, and the gelatinized starch and the low molecular chitosan are combined to play a role in wetting from the inside and the outside of the coating respectively, so that the powder coating and the coated object have good wettability, and meanwhile, the antibacterial property of the coating can be obviously improved; according to the invention, through optimizing the components and proportioning and mutually influencing and matching the components, the prepared thermosetting powder coating has super-strong weather resistance.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto, and various substitutions and alterations can be made without departing from the technical idea of the present invention as described above, according to the common technical knowledge and the conventional means in the field.
Example 1
A thermosetting powder coating is prepared from the following raw materials in parts by weight: 30 parts of polyester resin, 12 parts of calcium carbonate, 5 parts of bentonite, 3 parts of zeolite powder, 3 parts of mica powder, 0.2 part of sodiumizing agent, 0.2 part of low molecular chitosan, 0.2 part of gelatinized starch, 0.2 part of alumina, 0.3 part of solid acrylic resin, 0.1 part of polysiloxane, 1 part of organic pigment powder and 0.2 part of sodium carbonate; wherein the particle size of the calcium carbonate, the bentonite, the zeolite powder and the mica powder is 200-300 meshes; the particle size of the sodium reagent is 200-300 meshes.
When in preparation, the polyester resin, the calcium carbonate, the bentonite, the zeolite powder, the mica powder, the sodiumizing agent, the alumina, the solid acrylic resin, the polysiloxane, the organic pigment powder and the sodium carbonate which are weighed according to the weight ratio are put into a mixing tank for premixing for 15min, and then are subjected to hot melting extrusion by a double-screw extruder at the temperature of 110-120 ℃, and the rotating speed is 200 r/min; then rapidly cooling the pressed tablet extruded by the cooling tablet press; and finally grinding the cooled tablet into powder.
Example 2
A thermosetting powder coating is prepared from the following raw materials in parts by weight: 35 parts of polyester resin, 13.5 parts of calcium carbonate, 7.5 parts of bentonite, 4 parts of zeolite powder, 4 parts of mica powder, 0.4 part of sodiumizing agent, 0.35 part of low molecular chitosan, 0.35 part of gelatinized starch, 0.3 part of alumina, 0.4 part of solid acrylic resin, 0.2 part of polysiloxane, 1.5 parts of organic pigment powder and 0.4 part of sodium carbonate; wherein the particle size of the calcium carbonate, the bentonite, the zeolite powder and the mica powder is 200-300 meshes; the particle size of the sodium reagent is 200-300 meshes.
When in preparation, the polyester resin, the calcium carbonate, the bentonite, the zeolite powder, the mica powder, the sodiumizing agent, the alumina, the solid acrylic resin, the polysiloxane, the organic pigment powder and the sodium carbonate which are weighed according to the weight ratio are put into a mixing tank for premixing for 18min, and then are subjected to hot melting extrusion by a double-screw extruder at the temperature of 110-120 ℃, and the rotating speed is 200 r/min; then rapidly cooling the pressed tablet extruded by the cooling tablet press; and finally grinding the cooled tablet into powder.
Example 3
A thermosetting powder coating is prepared from the following raw materials in parts by weight: 40 parts of polyester resin, 15 parts of calcium carbonate, 10 parts of bentonite, 5 parts of zeolite powder, 5 parts of mica powder, 0.6 part of sodiumizing agent, 0.5 part of low molecular chitosan, 0.5 part of gelatinized starch, 0.4 part of alumina, 0.5 part of solid acrylic resin, 0.3 part of silicon dioxide, 2 parts of organic pigment powder and 0.6 part of sodium carbonate; wherein the particle size of the calcium carbonate, the bentonite, the zeolite powder and the mica powder is 200-300 meshes; the particle size of the sodium reagent is 200-300 meshes.
When in preparation, the polyester resin, the calcium carbonate, the bentonite, the zeolite powder, the mica powder, the sodiumizing agent, the alumina, the solid acrylic resin, the silicon dioxide, the organic pigment powder and the sodium carbonate which are weighed according to the weight ratio are put into a mixing tank for premixing for 20min, and then are subjected to hot melting extrusion by a double-screw extruder at the temperature of 110-120 ℃, and the rotating speed is 200 r/min; then rapidly cooling the pressed tablet extruded by the cooling tablet press; and finally grinding the cooled tablet into powder.
The thermosetting powder coatings obtained in examples 1 to 3 were tested for their properties, the data being shown in the following table:
| performance testing | Example 1 | Example 2 | Example 3 |
| Appearance of the product | Smoothing | Smoothing | Smoothing |
| Adhesion force | Level 0 | Level 0 | Level 0 |
| Solvent resistance | 2-3 stages | 2-3 stages | 2-3 stages |
| Impact resistance (recoil)/cm | 58 | 60 | 61 |
| Accelerated aging test (4000 h, exposure ≧ exposure) | 60% | 60% | 60% |
Although the embodiments have been described, once the basic inventive concept is obtained, other variations and modifications of these embodiments can be made by those skilled in the art, so that the above embodiments are only examples of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes using the contents of the present specification and drawings, or any other related technical fields, which are directly or indirectly applied thereto, are included in the scope of the present invention.
Claims (9)
1. The thermosetting powder coating is characterized by comprising the following raw materials in parts by weight: 30-40 parts of polyester resin, 12-15 parts of calcium carbonate, 5-10 parts of bentonite, 3-5 parts of zeolite powder, 3-5 parts of mica powder, 0.2-0.6 part of sodiumizing agent, 0.2-0.5 part of low molecular chitosan, 0.2-0.5 part of gelatinized starch, 0.2-0.4 part of alumina, 0.3-0.5 part of solid acrylic resin, 0.1-0.3 part of flatting agent, 1-2 parts of pigment and 0.2-0.6 part of defoaming agent.
2. A thermosetting powder coating according to claim 1, wherein the leveling agent is a polysiloxane or silica.
3. The thermosetting powder coating of claim 1, wherein the pigment is an organic pigment powder.
4. A thermosetting powder coating according to claim 1, wherein the defoaming agent is sodium carbonate.
5. The thermosetting powder coating of claim 1, wherein the particle size of the calcium carbonate, bentonite, zeolite powder and mica powder is 200-300 mesh.
6. The thermosetting powder coating material as claimed in claim 1, wherein the particle size of the sodium reagent is 200-300 mesh.
7. The method of preparing a thermosetting powder coating according to claim 1, comprising the steps of: putting polyester resin, calcium carbonate, bentonite, zeolite powder, mica powder, a sodium agent, alumina, solid acrylic resin, a leveling agent, pigment and a defoaming agent which are weighed according to the weight ratio into a mixing tank for premixing, and then carrying out hot melt extrusion by a double-screw extruder; then rapidly cooling the pressed tablet extruded by the cooling tablet press; and finally grinding the cooled tablet into powder.
8. The method of claim 7, wherein the pre-mixing time is 15-20 min.
9. The method as claimed in claim 7, wherein the twin-screw extruder is operated at a speed of 200r/min under temperature conditions of 110 ℃ and 120 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910809609.6A CN112442311A (en) | 2019-08-29 | 2019-08-29 | Thermosetting powder coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910809609.6A CN112442311A (en) | 2019-08-29 | 2019-08-29 | Thermosetting powder coating and preparation method thereof |
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| CN112442311A true CN112442311A (en) | 2021-03-05 |
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| CN201910809609.6A Pending CN112442311A (en) | 2019-08-29 | 2019-08-29 | Thermosetting powder coating and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113354991A (en) * | 2021-05-20 | 2021-09-07 | 深圳市深赛尔股份有限公司 | Water-based environment-friendly coating of synthetic resin powder for tower of wind-driven generator and preparation method of water-based environment-friendly coating |
| PL443908A1 (en) * | 2023-02-27 | 2024-09-02 | Politechnika Rzeszowska im. Ignacego Łukasiewicza | Antimicrobial powder coating and method for producing the antimicrobial powder coating |
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| CN103756525A (en) * | 2013-12-31 | 2014-04-30 | 重庆七彩虹化工有限公司 | Thermosetting powder coating and preparation method thereof |
| CN107384152A (en) * | 2017-09-14 | 2017-11-24 | 如皋市乐恒化工有限公司 | A kind of nanometer grade powder coating |
| CN110100746A (en) * | 2019-06-24 | 2019-08-09 | 内蒙古润隆化工有限责任公司 | A kind of dustless deodorization bentonite cat litter and preparation method thereof |
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2019
- 2019-08-29 CN CN201910809609.6A patent/CN112442311A/en active Pending
Patent Citations (4)
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| US20080262153A1 (en) * | 2005-01-20 | 2008-10-23 | Gerhard Reich | Thermosetting Powder Paint Composition and Polyester Resin Which Can be Used for Its Manufacture |
| CN103756525A (en) * | 2013-12-31 | 2014-04-30 | 重庆七彩虹化工有限公司 | Thermosetting powder coating and preparation method thereof |
| CN107384152A (en) * | 2017-09-14 | 2017-11-24 | 如皋市乐恒化工有限公司 | A kind of nanometer grade powder coating |
| CN110100746A (en) * | 2019-06-24 | 2019-08-09 | 内蒙古润隆化工有限责任公司 | A kind of dustless deodorization bentonite cat litter and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113354991A (en) * | 2021-05-20 | 2021-09-07 | 深圳市深赛尔股份有限公司 | Water-based environment-friendly coating of synthetic resin powder for tower of wind-driven generator and preparation method of water-based environment-friendly coating |
| PL443908A1 (en) * | 2023-02-27 | 2024-09-02 | Politechnika Rzeszowska im. Ignacego Łukasiewicza | Antimicrobial powder coating and method for producing the antimicrobial powder coating |
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Application publication date: 20210305 |