CN111777915A - Antistatic powder coating and preparation method thereof - Google Patents
Antistatic powder coating and preparation method thereof Download PDFInfo
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- CN111777915A CN111777915A CN202010772064.9A CN202010772064A CN111777915A CN 111777915 A CN111777915 A CN 111777915A CN 202010772064 A CN202010772064 A CN 202010772064A CN 111777915 A CN111777915 A CN 111777915A
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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
- 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
- C09D5/24—Electrically-conducting paints
-
- 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
- C08K2201/001—Conductive additives
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- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- 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)
- Paints Or Removers (AREA)
Abstract
The invention discloses an antistatic powder coating and a preparation method thereof, wherein the antistatic powder coating comprises the following raw materials in parts by weight: the coating comprises o-cresol formaldehyde modified epoxy resin, fluorocarbon resin, a curing agent, conductive carbon black, benzoin, a flatting agent and inorganic pigment. The powder coating forms a coating after application, and the coating has strong conductivity, so that electrostatic aggregation is hardly formed on the surface of the coating, and the powder coating has strong antistatic performance.
Description
Technical Field
The invention relates to the technical field of powder coatings, in particular to an antistatic powder coating and a preparation method thereof.
Background
Powder coatings represent a rapidly growing area in the overall coating technology. Because the VOC emission is almost zero, the rapid development of the VOC is driven by the environmental protection requirement. The requirements of global and Chinese environmental protection laws and regulations are more and more strict, and the development of the environmental protection powder coating industry is effectively promoted.
The existing powder coatings are applied on various sheet surfaces, such as: wood, plastic, metal and the like, and after the powder coating is cured, a coating is formed to protect the board; however, the existing coating generally has better insulation property, so static electricity is easily formed on the surface of the coating, and especially when the difference between two temperature difference objects is larger, the more the static electricity is generated, such as: in cold outdoor, when the coating is contacted with a human body, people often feel like an instant electric shock due to the release of static electricity, so that the people feel very uncomfortable.
Disclosure of Invention
In view of the above, the present invention provides an antistatic powder coating and a method for preparing the same, wherein the powder coating forms a coating layer having excellent antistatic performance and does not give a feeling of electric shock even in late winter.
An antistatic powder coating comprises the following raw materials in parts by weight:
preferably, the raw materials comprise the following components in parts by weight:
preferably, the epoxy value of the o-cresol formaldehyde modified epoxy resin is 0.55-0.8eq/100g, and the softening point temperature is 80-100 ℃.
Preferably, the fluorocarbon resin has a number average molecular weight of 18000-24000.
Preferably, the curing agent is one of aliphatic diamine, polyamine, aromatic polyamine, dicyandiamide, and imidazole.
Preferably, the leveling agent is one of polydimethylsiloxane, polyether polyester modified organic siloxane, alkyl modified organic siloxane and terminal modified organic silicon.
Preferably, the leveling agent is polyether polyester modified organic siloxane, and the molecular weight of the polyether polyester modified organic siloxane is 5000-20000.
Preferably, the pigment is pearl powder or titanium dioxide.
A preparation method of antistatic powder coating comprises the following steps:
crushing o-cresol formaldehyde modified epoxy resin, fluorocarbon resin, a curing agent, conductive carbon black, benzoin, a flatting agent and an inorganic pigment to 50-100 meshes, and uniformly mixing to obtain a mixed material;
adding the mixed material into a double-screw extruder, wherein the rotating speed of a screw is 150-;
adding the melt extrusion into a tablet press, and cooling at the temperature of 20-40 ℃ after tabletting and forming;
adding the tablet into a crusher for crushing for 2-5 min;
grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets with a sieve of 200 meshes and 400 meshes to obtain the powder coating.
Preferably, the method is as follows:
crushing o-cresol formaldehyde modified epoxy resin, fluorocarbon resin, a curing agent, conductive carbon black, benzoin, a flatting agent and inorganic pigment to 60-80 meshes, and uniformly mixing to obtain a mixed material;
adding the mixed material into a double-screw extruder, wherein the rotating speed of a screw is 160-;
adding the melt extrusion into a tablet press, and cooling at 24-36 ℃ after tabletting and forming;
adding the tablet into a crusher for crushing for 3-4 min;
grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets through a sieve of 250 meshes and 350 meshes to obtain the powder coating.
The invention provides an antistatic powder coating and a preparation method thereof.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
An antistatic powder coating comprises the following raw materials in parts by weight:
wherein the epoxy value of the o-cresol formaldehyde modified epoxy resin is 0.55-0.8eq/100g, and the softening point temperature is 80-100 ℃; the number average molecular weight of the fluorocarbon resin is 18000-24000; the curing agent is one of aliphatic diamine, polyamine, aromatic polyamine, dicyandiamide and imidazole; the flatting agent is one of polydimethylsiloxane, polyether polyester modified organic siloxane, alkyl modified organic siloxane and end group modified organic silicon; the leveling agent is polyether polyester modified organic siloxane, and the molecular weight of the polyether polyester modified organic siloxane is 5000-; the pigment is pearl powder or titanium dioxide.
A preparation method of antistatic powder coating comprises the following steps:
crushing o-cresol formaldehyde modified epoxy resin, fluorocarbon resin, a curing agent, conductive carbon black, benzoin, a flatting agent and an inorganic pigment to 50-100 meshes, and uniformly mixing to obtain a mixed material;
adding the mixed material into a double-screw extruder, wherein the rotating speed of a screw is 150-;
adding the melt extrusion into a tablet press, and cooling at the temperature of 20-40 ℃ after tabletting and forming;
adding the tablet into a crusher for crushing for 2-5 min;
grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets with a sieve of 200 meshes and 400 meshes to obtain the powder coating.
Example 1
An antistatic powder coating comprises the following raw materials in parts by weight:
wherein the epoxy value of the o-cresol formaldehyde modified epoxy resin is 0.8eq/100g, and the softening point temperature is 80 ℃; the number average molecular weight of the fluorocarbon resin is 18000-22000; the curing agent is aliphatic diamine; the flatting agent is polydimethylsiloxane; the pigment is pearl powder.
A preparation method of antistatic powder coating comprises the following steps:
crushing o-cresol formaldehyde modified epoxy resin, fluorocarbon resin, a curing agent, conductive carbon black, benzoin, a flatting agent and an inorganic pigment to 50 meshes, and uniformly mixing to obtain a mixed material;
adding the mixed material into a double-screw extruder, wherein the rotating speed of screws is 200r/min, the temperature of a cavity of the extruder is 90-110 ℃, the temperature of a head of the extruder is 125-;
adding the melt extrusion into a tablet press, and cooling at the temperature of 20 ℃ after tabletting and forming;
adding the tablet into a crusher for crushing for 2 min;
and grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets by a 200-mesh sieve to obtain the powder coating.
Example 2
An antistatic powder coating comprises the following raw materials in parts by weight:
wherein the epoxy value of the o-cresol formaldehyde modified epoxy resin is 0.7eq/100g, and the softening point temperature is 90 ℃; the number average molecular weight of the fluorocarbon resin is 19000-23000; the curing agent is aromatic polyamine; the flatting agent is alkyl modified organic siloxane; the pigment is titanium dioxide.
A preparation method of antistatic powder coating comprises the following steps:
crushing o-cresol formaldehyde modified epoxy resin, fluorocarbon resin, a curing agent, conductive carbon black, benzoin, a flatting agent and an inorganic pigment to 60 meshes, and uniformly mixing to obtain a mixed material;
adding the mixed materials into a double-screw extruder, wherein the rotating speed of screws is 180r/min, the temperature of a machine cavity is 100 ℃, the temperature of a machine head is 128 ℃, and performing melt extrusion to obtain an extruded material;
adding the melt extrusion into a tablet press, and cooling at the temperature of 36 ℃ after tabletting and forming;
adding the tablet into a crusher for crushing for 3 min;
and grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets by a 250-mesh sieve to obtain the powder coating.
Example 3
An antistatic powder coating comprises the following raw materials in parts by weight:
wherein the epoxy value of the o-cresol formaldehyde modified epoxy resin is 0.55eq/100g, and the softening point temperature is 84 ℃; the number average molecular weight of the fluorocarbon resin is 18500-24000; the curing agent is polyamine; the leveling agent is polyether polyester modified organic siloxane, and the molecular weight of the polyether polyester modified organic siloxane is 8000-20000; the pigment is titanium dioxide.
A preparation method of antistatic powder coating comprises the following steps:
crushing o-cresol formaldehyde modified epoxy resin, fluorocarbon resin, a curing agent, conductive carbon black, benzoin, a flatting agent and an inorganic pigment to 100 meshes, and uniformly mixing to obtain a mixed material;
adding the mixed material into a double-screw extruder, wherein the rotating speed of screws is 150r/min, the temperature of a cavity of the extruder is 95-120 ℃, the temperature of a head of the extruder is 120-;
adding the melt extrusion into a tablet press, and cooling at 40 ℃ after tabletting and forming;
adding the tablet into a crusher for crushing for 5 min;
and grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets by a 400-mesh sieve to obtain the powder coating.
Example 4
An antistatic powder coating comprises the following raw materials in parts by weight:
wherein the epoxy value of the o-cresol formaldehyde modified epoxy resin is 0.6eq/100g, and the softening point temperature is 95 ℃; the number average molecular weight of the fluorocarbon resin is 19000-21000; the curing agent is dicyandiamide; the leveling agent is end group modified organic silicon; the pigment is pearl powder.
A preparation method of antistatic powder coating comprises the following steps:
crushing o-cresol formaldehyde modified epoxy resin, fluorocarbon resin, a curing agent, conductive carbon black, benzoin, a flatting agent and an inorganic pigment to 80 meshes, and uniformly mixing to obtain a mixed material;
adding the mixed materials into a double-screw extruder, wherein the rotating speed of screws is 160r/min, the temperature of a machine cavity is 115 ℃, the temperature of a machine head is 128 ℃, and performing melt extrusion to obtain an extrudate;
adding the melt extrusion into a tablet press, and cooling at 24 ℃ after tabletting and forming;
adding the tablet into a crusher for crushing for 4 min;
and grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets by 350 meshes to obtain the powder coating.
Example 5
An antistatic powder coating comprises the following raw materials in parts by weight:
wherein the epoxy value of the o-cresol formaldehyde modified epoxy resin is 0.6eq/100g, and the softening point temperature is 88 ℃; the number average molecular weight of the fluorocarbon resin is 20000-23000; the curing agent is imidazole curing agent; the flatting agent is alkyl modified organic siloxane; the pigment is titanium dioxide.
A preparation method of antistatic powder coating comprises the following steps:
crushing o-cresol formaldehyde modified epoxy resin, fluorocarbon resin, a curing agent, conductive carbon black, benzoin, a flatting agent and an inorganic pigment to 70 meshes, and uniformly mixing to obtain a mixed material;
adding the mixed materials into a double-screw extruder, wherein the rotating speed of screws is 170r/min, the temperature of a machine cavity is 112 ℃, the temperature of a machine head is 125 ℃, and performing melt extrusion to obtain an extrudate;
adding the melt extrusion into a tablet press, and cooling at the temperature of 30 ℃ after tabletting and forming;
adding the tablet into a crusher for crushing for 4 min;
and grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets by a 300-mesh sieve to obtain the powder coating.
The powder coatings of specific examples 1-5 were applied to panels and coated with a commercially available "Tian Cai" antistatic powder coating (comparative example 1) for surface resistance, adhesion, impact strength and bending; the test method comprises the following steps: surface resistance (temperature 20 ℃, humidity 60%), adhesion (ISO2409-2007), impact strength (GB/T1732-93) and bending (GB/T6742-1986) were tested, and the test results were as follows:
as can be seen from the above table: compared with the comparative example 1, the powder coatings of the specific examples 1 to 5 have the advantages that the surface resistances (the surface resistance of the outer wall and the surface resistance of the inner wall) of the examples 1 to 5 are greatly improved compared with the comparative example 1, the adhesive force is equivalent, the impact strength is improved to a certain extent, and the bending strength resistance is greatly improved.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.
The present invention has been described in detail, and the principle and embodiments of the present invention are explained by applying specific examples, which are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Claims (10)
1. The antistatic powder coating is characterized by comprising the following raw materials in parts by weight:
2. the powder coating of claim 1, wherein the raw materials comprise, by weight:
3. the powder coating according to any one of claims 1 to 2, wherein the o-cresol formaldehyde modified epoxy resin has an epoxy value of 0.55 to 0.8eq/100g and a softening point temperature of 80 to 100 ℃.
4. The powder coating of any one of claims 1-2, wherein the fluorocarbon resin has a number average molecular weight of 18000-24000.
5. The powder coating according to any one of claims 1-2, wherein the curing agent is one of aliphatic diamine, polyamine, aromatic polyamine, dicyandiamide, and imidazole.
6. The powder coating according to any one of claims 1-2, wherein the leveling agent is one of polydimethylsiloxane, polyether polyester modified organosiloxane, alkyl modified organosiloxane, and terminal modified silicone.
7. The powder coating of claim 6, wherein the leveling agent is a polyether polyester modified organosiloxane, and the molecular weight of the polyether polyester modified organosiloxane is 5000-20000.
8. The powder coating of any one of claims 1-2, wherein the pigment is pearl powder or titanium dioxide.
9. A preparation method of antistatic powder coating is characterized by comprising the following steps:
crushing o-cresol formaldehyde modified epoxy resin, fluorocarbon resin, a curing agent, conductive carbon black, benzoin, a flatting agent and an inorganic pigment to 50-100 meshes, and uniformly mixing to obtain a mixed material;
adding the mixed material into a double-screw extruder, wherein the rotating speed of a screw is 150-;
adding the melt extrusion into a tablet press, and cooling at the temperature of 20-40 ℃ after tabletting and forming;
adding the tablet into a crusher for crushing for 2-5 min;
grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets with a sieve of 200 meshes and 400 meshes to obtain the powder coating.
10. The method for preparing the compound of claim 9, wherein the method comprises the following steps:
crushing o-cresol formaldehyde modified epoxy resin, fluorocarbon resin, a curing agent, conductive carbon black, benzoin, a flatting agent and inorganic pigment to 60-80 meshes, and uniformly mixing to obtain a mixed material;
adding the mixed material into a double-screw extruder, wherein the rotating speed of a screw is 160-;
adding the melt extrusion into a tablet press, and cooling at 24-36 ℃ after tabletting and forming;
adding the tablet into a crusher for crushing for 3-4 min;
grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets through a sieve of 250 meshes and 350 meshes to obtain the powder coating.
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Application publication date: 20201016 |