CN112724776A - Antistatic powder coating and preparation method thereof - Google Patents
Antistatic powder coating and preparation method thereof Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims abstract description 120
- 238000000576 coating method Methods 0.000 title claims abstract description 93
- 239000011248 coating agent Substances 0.000 title claims abstract description 86
- 238000002360 preparation method Methods 0.000 title abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 65
- 239000002482 conductive additive Substances 0.000 claims abstract description 54
- 239000002994 raw material Substances 0.000 claims abstract description 39
- 239000002131 composite material Substances 0.000 claims abstract description 35
- 239000007822 coupling agent Substances 0.000 claims abstract description 35
- 229920005989 resin Polymers 0.000 claims abstract description 34
- 239000011347 resin Substances 0.000 claims abstract description 34
- 239000003381 stabilizer Substances 0.000 claims abstract description 29
- 150000007524 organic acids Chemical class 0.000 claims abstract description 28
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 22
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 239000000049 pigment Substances 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 66
- 229910021389 graphene Inorganic materials 0.000 claims description 51
- 238000002156 mixing Methods 0.000 claims description 50
- 239000002245 particle Substances 0.000 claims description 46
- 238000005054 agglomeration Methods 0.000 claims description 33
- 230000002776 aggregation Effects 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 29
- -1 alkoxy pyrophosphate compound Chemical class 0.000 claims description 17
- 229920000642 polymer Polymers 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 11
- 229920001225 polyester resin Polymers 0.000 claims description 11
- 239000004645 polyester resin Substances 0.000 claims description 11
- 238000007873 sieving Methods 0.000 claims description 11
- 239000002041 carbon nanotube Substances 0.000 claims description 9
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 9
- 238000010298 pulverizing process Methods 0.000 claims description 8
- 239000003822 epoxy resin Substances 0.000 claims description 7
- 229920000767 polyaniline Polymers 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- OUPZKGBUJRBPGC-UHFFFAOYSA-N 1,3,5-tris(oxiran-2-ylmethyl)-1,3,5-triazinane-2,4,6-trione Chemical compound O=C1N(CC2OC2)C(=O)N(CC2OC2)C(=O)N1CC1CO1 OUPZKGBUJRBPGC-UHFFFAOYSA-N 0.000 claims description 6
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- 239000004952 Polyamide Substances 0.000 claims description 4
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- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229920006217 cellulose acetate butyrate Polymers 0.000 claims description 3
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 150000008442 polyphenolic compounds Chemical class 0.000 claims description 3
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 2
- 235000011180 diphosphates Nutrition 0.000 claims description 2
- 239000005056 polyisocyanate Substances 0.000 claims description 2
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- TVIDDXQYHWJXFK-UHFFFAOYSA-N dodecanedioic acid Chemical group OC(=O)CCCCCCCCCCC(O)=O TVIDDXQYHWJXFK-UHFFFAOYSA-N 0.000 description 2
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- 238000011065 in-situ storage Methods 0.000 description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
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- 229910000553 6063 aluminium alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
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- 229920000570 polyether Polymers 0.000 description 1
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- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 238000005036 potential barrier Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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Classifications
-
- 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
-
- 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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- 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
- 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
-
- 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
- C08K2201/011—Nanostructured additives
-
- 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
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- 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
Abstract
The invention relates to the field of preparation methods of high polymer materials, and particularly discloses an antistatic powder coating and a preparation method thereof; comprises a component A and a component B which are prepared according to the weight percentage of 200-20: 1; the component A comprises the following raw materials in percentage by weight: resin: 30.0 to 75.0 percent; curing agent: 3.0 to 30.0 percent; leveling agent: 0.8 to 1.5 percent; coupling agent: 1.0-5.0%; defoaming agent: 0.3 to 1.0 percent; an electrization agent: 0.2 to 1.0 percent; other auxiliary agents: 0.5 to 5.0 percent; pigment and filler: 10.0 to 45.0 percent; the sum of the weight percentages of the raw materials is 100 percent; the component B comprises the following raw materials in percentage by weight: composite conductive additive: 40.0 to 85.0 percent; organic acid modified stabilizer: 10.0 to 58.0 percent; coupling agent: 0.5 to 8.0 percent; dispersing agent: 0.2 to 5.0 percent; the sum of the weight percentages of the components is 100 percent. The invention also discloses a preparation method for preparing the antistatic powder coating. The antistatic powder coating disclosed by the invention can improve the application efficiency of the conductive material, reduce the coating cost and obviously improve the corrosion resistance and the conductive stability of the coating.
Description
Technical Field
The invention relates to the field of preparation of high polymer materials, in particular to an antistatic powder coating and a preparation method thereof.
Background
The antistatic powder coating is a functional coating with certain current conduction and static elimination, has the performances of electromagnetic shielding, static elimination, corrosion resistance and the like, and is widely applied to the fields of electronic appliances, petrochemical industry, textile, aviation and the like.
At present, antistatic coatings are generally classified into additive type coatings and intrinsic type coatings, the intrinsic type antistatic coatings are not mature in technology, and the antistatic coatings commonly used in the market are generally additive type coatings. According to the conductive infinite network chain theory of the composite conductive high polymer provided by F latch: the additive antistatic coating is prepared by adding a certain amount of conductive materials into non-conductive base resin to realize the function of static conduction, a conductive network or a conductive path can be formed only when the conductive materials reach a certain concentration, and the resistivity of the system is reduced, so that the conductive property is reflected.
The high polymer system mainly realizes the conduction and the free electron transmission by three mechanisms of a conductive channel, a tunnel effect, field emission and the like:
(a) the mechanism of conduction pathways: part of conductive material particles in the high polymer system can be mutually contacted to form a chain-shaped conductive channel, so that the whole system is conductive.
(b) The tunneling mechanism is as follows: when the content of the conductive material in the high polymer system is low and the distance between the conductive material particles is large, the conductive phenomenon still exists, but the conductive network is not realized by the contact of the conductive material particles, but is caused by the migration of electrons between the conductive material particles (free electron migration) during thermal vibration, and the conductive current, namely the tunnel current, is an exponential function of the gap width between the conductive material particles. Tunneling occurs almost exclusively between closely spaced particles of conductive material, with no current conduction behavior between particles of conductive material with too large gaps.
(c) The field emission effect mechanism: when the content of the conductive material in the high polymer system is low, the particle distance of the conductive material is large, and the internal electric field between the conductive materials is strong, electrons have high probability to jump over the resin interface potential barrier to the adjacent conductive material particles, so that field emission current is generated, and a conductive network is formed.
Therefore, under the condition of high content of the conductive material, the distance between the conductive materials in the high polymer system is small, the probability of forming a continuous conductive channel is high, and the action of a conductive channel mechanism is dominant; under the conditions of low conductive material content and low external voltage, the distance between the conductive materials is larger, the probability of forming a chain-shaped conductive channel is smaller, and the tunnel effect plays a main role at the moment; under the conditions of low conductive material content and high external voltage, the internal electric field between the conductive materials is very strong, electrons have high probability to jump over the resin interface layer and jump to adjacent conductive material particles to generate current, namely, a field-induced emission mechanism plays a main role.
The existing antistatic powder coating is prepared by simply mixing conductive materials (conductive carbon black, graphene, conductive polymer and conductive metal) with a resin base material and then melting and extruding the mixture, which easily causes that most of the conductive materials in a coating system are coated or isolated by the resin base material and are difficult to be mutually connected to form a conductive channel. This easily results in extremely low utilization of the conductive material and increased material cost; more importantly, due to the problems of particle size, compatibility and the like of the conductive material and the base resin, the conductive material is difficult to be uniformly dispersed only through processes such as melting, mixing and the like, the conductive stability of the coating is poor, and the phenomenon of local non-conduction is easy to occur.
Patent CN110819215A discloses a modified graphene antistatic powder coating, which comprises the following components: 50-70 parts of resin, 0-7.5 parts of curing agent, 1-3.5 parts of auxiliary agent, 0.2-1 part of modified graphene, 25-45 parts of filler and 0.05-0.2 part of wax powder. The invention adds modified graphene oxideThe surface resistivity of the powder coating film is remarkably reduced, but since the conductive material (such as modified graphene) is dispersed in the matrix by melt extrusion, a large part of the conductive material is already coated with a material such as resin, and a conductive network is difficult to form in the coating film, so that the conductivity stability of the whole coating film is poor. For another example, patent CN110684441A discloses a method for preparing an electrostatic powder coating, which comprises the following components: 15 parts of epoxy resin particles, 18 parts of polyester resin particles, 3 parts of copper powder, 4 parts of zinc oxide powder, 4 parts of rutile titanium dioxide powder, 3 parts of barium sulfate particles, 1.5 parts of calcium carbonate particles, 0.3 part of benzil ketone, 3 parts of a leveling agent, 0.8 part of a brightener and 0.2 part of an antistatic auxiliary agent. The invention achieves the effect of film conduction mainly through internal extrusion and external addition of metal and metal oxide powder, and the volume resistivity of the prepared film can reach 104Omega cm, but the addition of a large amount of metal conductive material easily affects the powdering rate and the decorativeness of the powder coating, and the material cost is very high.
In summary, in the field of powder coating preparation, many practical problems to be solved in the practical application of antistatic powder have not been proposed.
Disclosure of Invention
The invention provides an antistatic powder coating and a preparation method thereof, which can improve the application efficiency of a conductive material, reduce the coating cost and remarkably improve the corrosion resistance and the conductive stability of a coating.
In order to achieve the purpose, the invention provides an antistatic powder coating which is realized by adopting the following technical scheme: the antistatic powder coating comprises a component A and a component B, wherein the component A and the component B are prepared according to the weight percentage of 200-20: 1; the component A comprises the following raw materials in percentage by weight:
resin: 30.0 to 75.0 percent
Curing agent: 3.0 to 30.0 percent
Leveling agent: 0.8 to 1.5 percent
Coupling agent: 1.0-5.0%
Defoaming agent: 0.3-1.0%
An electrization agent: 0.2 to 1.0 percent
Other auxiliary agents: 0.5-5.0%
Pigment and filler: 10.0 to 45.0 percent
The sum of the weight percentages of the raw materials is 100 percent;
the component B comprises the following raw materials in percentage by weight:
composite conductive additive: 40.0 to 85.0 percent
Organic acid modified stabilizer: 10.0 to 58.0 percent
Coupling agent: 0.5-8.0%
Dispersing agent: 0.2 to 5.0 percent
The sum of the weight percentages of the components is 100 percent.
The invention also provides a preparation method for preparing the antistatic powder coating, which comprises the following operation steps: a. putting the raw materials in the component A into a high-speed mixer according to mass percentage for mixing to obtain premix; the rotating speed of the high-speed mixer is 1500-; b. b, adding the premix in the step a into a high-temperature extruder, carrying out melt mixing, cooling and tabletting to prepare a tabletting material, carrying out fine pulverization on the tabletting material, and sieving the particle size until D50 is 15-50 mu m powder particles, namely preparing the powder of the component A; c. b, mixing the powder of the component A and the material of the component B according to the weight ratio of 200-20:1, and putting the mixture into micro powder agglomeration equipment; obtaining agglomerates; micronizing the agglomerate, and sieving to obtain powder D50 of 20-50 μm to obtain antistatic powder coating; the feeding speed of the agglomeration equipment is set to be 5-45Hz, the temperature is set to be 30-85 ℃, the operating frequency is set to be 18-50Hz, the pressure is set to be 0-20MPa, and the agglomeration time is 2-20 min.
Compared with the prior art, the antistatic powder coating and the preparation method thereof have the following advantages:
1. the composite conductive auxiliary agent used in the invention is prepared by in-situ polymerization of two materials with excellent conductivity, namely graphene micro-sheets and conductive polymer, and finally the graphene modified conductive auxiliary agent is dispersed and adsorbed in the directional arrangement agent.
2. The powder formula of the invention adds the composite conductive additive in an agglomeration way, and the composite conductive additive is uniformly dispersed and agglomerated on the surface of the powder particles, and the powder formula has the advantages that: on one hand, the composite conductive additive does not pass through the mixing mode of high temperature and high shearing force of the extruder, so that the oxidation and the structural damage of the composite conductive additive are avoided; more importantly, the composite conductive auxiliary agent is easier to contact with each other on the surface of the powder particles, and a conductive loop is formed in the coating, so that the coating is provided with outstanding and stable conductive performance.
3. The organic acid stabilizer used in the powder formula can ensure the long-term guarantee of the composite stability of the graphene microchip and the conductive polymer, and more importantly, the stabilizer can form a layered structure with base materials such as resin and the like, so that the corrosion resistance of the coating is greatly improved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
The antistatic powder coating comprises a component A and a component B, wherein the component A and the component B are prepared according to the weight percentage of 200-20: 1; the component A comprises the following raw materials in percentage by weight: resin: 30.0 to 75.0 percent
Curing agent: 3.0 to 30.0 percent
Leveling agent: 0.8 to 1.5 percent
Coupling agent: 1.0-5.0%
Defoaming agent: 0.3-1.0%
An electrization agent: 0.2 to 1.0 percent
Other auxiliary agents: 0.5-5.0%
Pigment and filler: 10.0 to 45.0 percent
The sum of the weight percentages of the raw materials is 100 percent;
the component B comprises the following raw materials in percentage by weight:
composite conductive additive: 40.0 to 85.0 percent
Organic acid modified stabilizer: 10.0 to 58.0 percent
Coupling agent: 0.5-8.0%
Dispersing agent: 0.2 to 5.0 percent
The sum of the weight percentages of the components is 100 percent.
In the invention, the resin comprises one or more of carboxyl-terminated polyester resin, hydroxyl-terminated polyester resin, epoxy resin, fluorocarbon resin and acrylic resin; the curing agent comprises one or more of epoxy resin, triglycidyl isocyanurate, hydroxyalkyl amide, blocked polyisocyanate, dicyandiamide, substituted dicyandiamide and polycarboxylic acid.
Wherein the coupling agent comprises one or more of a modified organosiloxane polymer, a siloxy modified polymer, a chromium metal complex, and an alkoxy pyrophosphate compound.
The orientation arrangement agent is one of polyethylene modified polyamide wax, cellulose acetate butyrate, ethylene-vinyl acetate copolymer and polyvinyl alcohol polymer; the organic acid stabilizer comprises one or more of organic acid modified silicate compounds, aluminosilicate, silicon oxide, aluminum oxide and other nanoscale oxides.
As a preferable scheme, in the invention, the composite conductive additive is a mixture of a graphene modified conductive additive and an orientation arrangement agent, and the mass ratio of the graphene modified conductive additive to the orientation arrangement agent is 10-1: 1; the composite conductive additive is prepared by the working procedures of in-situ polymerization, emulsion (suspension) dispersion, stirring adsorption, drying, crushing and the like; preferably, the particle size distribution of the composite conductive additive D50 is less than or equal to 25 μm; preferably, the conductivity of the composite conductive additive is more than or equal to 8S/cm;
the graphene modified conductive additive is one or more of graphene modified polyphenol, graphene modified polypyrrole, graphene modified polythiophene, carbon nanotube doped polyaniline and carbon nanotube doped polythiophene.
According to the invention, the graphene modified conductive auxiliary agent contains graphene, the graphene in the graphene modified conductive auxiliary agent is powder graphene micro-sheets, and the carbon content is more than or equal to 98%; the particle size distribution D50 of the graphene modified conductive additive is less than or equal to 20 mu m. Preferably, the graphene is prepared by adopting a redox method, an epitaxial growth method and a vapor deposition method; preferably, the particle size distribution D50 of the graphene is less than or equal to 15 microns, the number of layers is less than or equal to 20 layers, the sheet thickness is less than or equal to 100nm, and the bulk density is 0.01-0.28 g/cm-3; preferably, the conductivity of the graphene is more than or equal to 200S/cm.
In the invention, the preparation method of the antistatic powder coating comprises the following operation steps:
a. putting the raw materials in the component A into a high-speed mixer according to mass percentage for mixing to obtain premix; the rotating speed of the high-speed mixer is 1500-;
b. b, adding the premix in the step a into a high-temperature extruder, carrying out melt mixing, cooling and tabletting to prepare a tabletting material, carrying out fine pulverization on the tabletting material, and sieving the particle size until D50 is 15-50 mu m powder particles, namely preparing the powder of the component A;
c. b, mixing the powder of the component A and the material of the component B according to the weight ratio of 200-20:1, and putting the mixture into micro powder agglomeration equipment; obtaining agglomerates; micronizing the agglomerate, and sieving to obtain powder D50 of 20-50 μm to obtain antistatic powder coating; the feeding speed of the agglomeration equipment is set to be 5-45Hz, the temperature is set to be 30-85 ℃, the operating frequency is set to be 18-50Hz, the pressure is set to be 0-20MPa, and the agglomeration time is 2-20 min.
The antistatic powder coating and the preparation process of the present invention are exemplified in the following examples
Example 1
The antistatic powder coating of the embodiment is prepared from the following A, B components in percentage by weight of 100: 1:
the component A comprises the following raw materials in percentage by weight:
resin: 60.0 percent
Curing agent: 3.0 percent
Leveling agent: 1.0 percent
Defoaming agent: 0.5 percent
Coupling agent: 2.0 percent
An electrization agent: 0.3 percent of
Other auxiliary agents: 2.0 percent
Pigment and filler: 31.2 percent
The component B comprises the following raw materials in percentage by weight:
composite conductive additive: 85.0 percent
Organic acid modified stabilizer: 12.5 percent
Coupling agent: 2.0 percent
Dispersing agent: 0.5 percent
Wherein the resin is an epoxy resin; the curing agent comprises substituted dicyandiamide; the coupling agent comprises a modified siloxy-modified polymer; the composite conductive additive is prepared by mixing graphene modified conductive additive and directional arrangement agent in a mass ratio of 9: 1; the graphene modified conductive additive is graphene modified polyaniline and carbon nanotube doped polyaniline; the orientation arrangement agent is polyethylene modified polyamide wax; the organic acid stabilizer is an organic acid modified silicate compound.
The preparation method for preparing the antistatic powder coating comprises the following operation steps:
a. putting the raw materials in the component A into a high-speed mixer according to the mass percentage, and mixing at a high speed of 2000r/min for 7-8min to obtain a premix;
b. and (b) adding the premix in the step (a) into a high-temperature extruder, carrying out melt mixing, cooling and tabletting, wherein the temperature of a melting section in the high-temperature extruder is set to be 110-.
c. And mixing the prepared component A powder and the component B material according to the weight ratio of 100:1, putting the mixture into micro powder agglomeration equipment, wherein the feeding speed of the agglomeration equipment is set to be 15Hz, the temperature is set to be 62-64 ℃, the operating frequency is set to be 32Hz, the pressure is set to be 12MPa, and after agglomeration time is 5min, micronizing and screening the obtained agglomerates until D50 is 30-32 mu m powder particles to obtain the antistatic powder coating.
Example 2
The antistatic powder coating of the embodiment is prepared from the following A, B components in percentage by weight of 200: 1:
the component A comprises the following raw materials in percentage by weight:
resin: 80.0 percent
Curing agent: 6.0 percent
Leveling agent: 1.2 percent of
Defoaming agent: 0.3 percent of
Coupling agent: 1.0 percent
An electrization agent: 0.5 percent
Other auxiliary agents: 2.5 percent
Pigment and filler: 8.5 percent
The component B comprises the following raw materials in percentage by weight:
composite conductive additive: 40.0 percent
Organic acid modified stabilizer: 55.0 percent
Coupling agent: 3.0 percent
Dispersing agent: 2.0 percent
Wherein the resin is carboxyl-terminated polyester resin; the curing agent is triglycidyl isocyanurate; the coupling agent is a modified organosiloxane polymer; the composite conductive additive is prepared by mixing graphene modified conductive additive and directional arrangement agent in a mass ratio of 5: 1; the graphene modified conductive auxiliary agent is carbon nano tube doped polyaniline; the orientation alignment agent is polyvinyl butyral; the organic acid stabilizer is an organic acid modified aluminosilicate compound.
The method for preparing the antistatic powder coating comprises the following operation steps:
a. putting the raw materials in the component A into a high-speed mixer according to the mass percentage, and mixing for 5min at a high speed of 2500r/min to obtain a premix;
b. and (b) adding the premix in the step (a) into a high-temperature extruder, carrying out melt mixing, cooling and tabletting, wherein the temperature of a melting section in the high-temperature extruder is set to be 105-115 ℃, the temperature of a mixing section is set to be 100-110 ℃, the rotating speed of a melt mixing screw is set to be 45Hz, and then carrying out fine pulverization on a tabletting material, and sieving the particle size until D50 is 19-21 mu m powder particles to obtain the component A powder.
c. And mixing the prepared component A powder and the component B material according to the weight ratio of 200:1, putting the mixture into micro powder agglomeration equipment, wherein the feeding speed of the agglomeration equipment is set to be 30Hz, the temperature is set to be 59-62 ℃, the operating frequency is set to be 50Hz, the pressure is set to be 20MPa, and after agglomeration time is 4min, micronizing and screening the obtained agglomerates until D50 is 23-25 mu m powder particles to obtain the antistatic powder coating.
Example 3
The antistatic powder coating is characterized by being prepared from the following A, B components in percentage by weight of 50: 1:
the component A comprises the following raw materials in percentage by weight:
resin: 60.0 percent
Curing agent: 15.0 percent
Leveling agent: 1.5 percent
Defoaming agent: 0.5 percent
Coupling agent: 3.0 percent
An electrization agent: 0.8 percent
Other auxiliary agents: 3.0 percent
Pigment and filler: 16.2 percent
The component B comprises the following raw materials in percentage by weight:
composite conductive additive: 65.0 percent
Organic acid modified stabilizer: 22.0 percent
Coupling agent: 8.0 percent
Dispersing agent: 5.0 percent
Wherein the resin is hydroxyl-terminated polyester resin and fluorocarbon resin; the curing agent is blocked isophorone diisocyanate; the coupling agent is a modified organic siloxane polymer and a silane oxygen-based modified polymer; the composite conductive additive is prepared by mixing graphene modified conductive additive and organic acid stabilizer in a mass ratio of 3: 1; the graphene modified conductive auxiliary agent is graphene modified polypyrrole; the orientation arrangement agent is an ethylene-vinyl acetate copolymer; the organic acid stabilizer is organic acid modified silica gel.
The method for preparing the antistatic powder coating comprises the following operation steps:
a. putting the raw materials in the component A into a high-speed mixer according to the mass percentage, and mixing at a high speed of 1500r/min for 13min to obtain a premix;
b. and (b) adding the premix in the step (a) into a high-temperature extruder, carrying out melt mixing, cooling and tabletting, wherein the temperature of a melting section in the high-temperature extruder is set to be in the range of 120-.
c. And mixing the prepared component A powder and the component B material according to the weight ratio of 50:1, putting the mixture into micro powder agglomeration equipment, wherein the feeding speed of the agglomeration equipment is set to be 12Hz, the temperature is set to be 54-56 ℃, the operating frequency is set to be 28Hz, the pressure is set to be 12MPa, and after agglomeration time is 6min, micronizing and screening the obtained agglomerates until D50 is 38-40 mu m powder particles to obtain the antistatic powder coating.
Example 4
The antistatic powder coating of the embodiment is prepared from the following A, B components in percentage by weight of 40: 1:
the component A comprises the following raw materials in percentage by weight:
resin: 45.0 percent
Curing agent: 12.0 percent
Leveling agent: 0.8 percent
Defoaming agent: 0.3 percent of
Coupling agent: 1.0 percent
An electrization agent: 0.5 percent
Other auxiliary agents: 3.0 percent
Pigment and filler: 37.4 percent
The component B comprises the following raw materials in percentage by weight:
composite conductive additive: 75.0 percent
Organic acid modified stabilizer: 23.0 percent
Coupling agent: 2.0 percent
Dispersing agent: 1.0 percent
Wherein the resin is glycidyl polyacrylic resin; the curing agent is dodecanedioic acid; the coupling agent is polyoxyethylene ether; the composite conductive additive is prepared by mixing graphene modified conductive additive and organic acid stabilizer in a mass ratio of 8: 1; the graphene modified conductive additive is graphene modified polythiophene and carbon nanotube doped polythiophene; the orientation arrangement agent is polyamide wax and ethylene-vinyl acetate copolymer; the organic acid stabilizer is an organic acid modified silicate compound and alumina.
The method for preparing the antistatic powder coating comprises the following operation steps:
a. putting the raw materials in the component A into a high-speed mixer according to the mass percentage, and mixing for 8min at a high speed of 2000r/min to obtain a premix;
b. and (b) adding the premix in the step (a) into a high-temperature extruder, carrying out melt mixing, cooling and tabletting, wherein the temperature of a melting section in the high-temperature extruder is set to be 130-140 ℃, the temperature of a mixing section is set to be 125-135 ℃, the rotating speed of a melt mixing screw is set to be 30Hz, and then carrying out fine pulverization on a tabletting material, and sieving the particle size until D50 is 15-17 mu m powder particles, thereby obtaining the component A powder.
c. And mixing the prepared component A powder and the component B material according to the weight ratio of 40:1, putting the mixture into micro powder agglomeration equipment, wherein the feeding speed of the agglomeration equipment is set to be 5Hz, the temperature is set to be 67-69 ℃, the operating frequency is set to be 25Hz, the pressure is set to be 10MPa, and after agglomeration time is 8min, micronizing and screening the obtained agglomerates until D50 is 20-22 mu m powder particles to obtain the antistatic powder coating.
Example 5
The antistatic powder coating of the embodiment is prepared from the following A, B components in percentage by weight of 120: 1:
the component A comprises the following raw materials in percentage by weight:
resin: 55.0 percent
Curing agent: 12.6 percent
Leveling agent: 1.0 percent
Defoaming agent: 1.0 percent
Coupling agent: 1.0 percent
An electrization agent: 0.5 percent
Other auxiliary agents: 2.5 percent
Pigment and filler: 26.4 percent
The component B comprises the following raw materials in percentage by weight:
composite conductive additive: 65.0 percent
Organic acid modified stabilizer: 33.5 percent
Coupling agent: 1.0 percent
Dispersing agent: 0.5 percent
Wherein the resin is carboxyl-terminated polyester resin and hydroxyl-terminated polyester resin; the curing agent is triglycidyl isocyanurate and enclosed isophorone diisocyanate; the coupling agent is a titanate coupling agent; the composite conductive additive is prepared by mixing graphene modified conductive additive and organic acid stabilizer in a mass ratio of 1: 1; the graphene modified conductive additive is graphene modified polyphenol; the directional arrangement agent is cellulose acetate butyrate; the organic acid stabilizer is an organic acid modified silicate compound.
The method for preparing the antistatic powder coating comprises the following operation steps:
a. putting the raw materials in the component A into a high-speed mixer according to the mass percentage, and mixing at a high speed of 1500r/min for 12min to obtain a premix;
b. and (b) adding the premix in the step (a) into a high-temperature extruder, carrying out melt mixing, cooling and tabletting, wherein the temperature of a melting section in the high-temperature extruder is set to be 110-plus-120 ℃, the temperature of a mixing section is set to be 100-plus-110 ℃, the rotating speed of a melt mixing screw is set to be 35Hz, and then carrying out fine pulverization on a tabletting material, and sieving the particle size until D50 is 32-35 mu m powder particles, thus obtaining the component A powder.
c. And mixing the prepared component A powder and the component B material according to the weight ratio of 120:1, putting the mixture into micro powder agglomeration equipment, wherein the feeding speed of the agglomeration equipment is set to be 38Hz, the temperature is set to be 63-65 ℃, the operating frequency is set to be 18Hz, the pressure is set to be 5MPa, and after the agglomeration time is 18min, micronizing and screening the obtained agglomerates until D50 is 34-38 mu m powder particles to obtain the antistatic powder coating.
According to the invention, the antistatic powder coating prepared by setting different proportions and process parameters in the 5 embodiments can improve the application efficiency of the conductive material, reduce the coating cost, and remarkably improve the corrosion resistance and the conductive stability of the coating.
In the following, by setting other different component proportions or different process methods, a comparative example is tried out so as to be compared with the embodiment of the invention;
comparative example 1
The antistatic powder coating of comparative example 1 was prepared from the following A, B components in weight percent 100: 1:
the component A comprises the following raw materials in percentage by weight:
resin: 60.0 percent
Curing agent: 3.0 percent
Leveling agent: 1.0 percent
Defoaming agent: 0.5 percent
Coupling agent: 2.0 percent
An electrization agent: 0.3 percent of
Other auxiliary agents: 2.0 percent
Pigment and filler: 31.2 percent
The component B comprises the following raw materials in percentage by weight:
83.3 percent of organic acid modified stabilizer
13.4 percent of coupling agent
3.33 percent of dispersant
Wherein the resin is an epoxy resin; the curing agent comprises substituted dicyandiamide; the coupling agent comprises a modified siloxy-modified polymer; the organic acid stabilizer is an organic acid modified silicate compound.
The preparation process for preparing the antistatic powder coating of comparative example 1 described above comprises the following operating steps:
a. putting the raw materials in the component A into a high-speed mixer according to the mass percentage, and mixing at a high speed of 2000r/min for 7-8min to obtain a premix;
b. and (b) adding the premix in the step (a) into a high-temperature extruder, carrying out melt mixing, cooling and tabletting, wherein the temperature of a melting section in the high-temperature extruder is set to be 110-.
c. After the prepared powder of the component A and the material of the component B are mixed according to the weight ratio of 100:1, the mixture is put into a micro powder agglomeration device, the feeding speed of the agglomeration device is set to be 15Hz, the temperature is set to be 62-64 ℃, the operating frequency is set to be 32Hz, the pressure is set to be 12MPa, and after agglomeration time is 5min, the obtained agglomerate is micronized and sieved until D50 is 30-32 mu m powder particles, thus obtaining the powder coating of the comparative example 1.
Comparative example 2
The antistatic powder coating of comparative example 2 was prepared from the following A, B components in weight percent 200: 1:
the component A comprises the following raw materials in percentage by weight:
resin: 80.0 percent
Curing agent: 6.0 percent
Leveling agent: 1.2 percent of
Defoaming agent: 0.3 percent of
Coupling agent: 1.0 percent
An electrization agent: 0.5 percent
Other auxiliary agents: 2.5 percent
Pigment and filler: 8.5 percent
The component B comprises the following raw materials in percentage by weight:
composite conductive additive: 40.0 percent
Organic acid modified stabilizer: 55.0 percent
Coupling agent: 3.0 percent
Dispersing agent: 2.0 percent
Wherein the resin is carboxyl-terminated polyester resin; the curing agent is triglycidyl isocyanurate; the coupling agent is a modified organosiloxane polymer; the composite conductive additive is prepared by mixing graphene modified conductive additive and directional arrangement agent in a mass ratio of 5: 1; the graphene modified conductive auxiliary agent is carbon nano tube doped polyaniline; the orientation alignment agent is polyvinyl butyral; the organic acid stabilizer is an organic acid modified aluminosilicate compound.
The preparation process for preparing the antistatic powder coating of comparative example 2 comprises the following operating steps:
a. respectively putting the raw materials in the A, B components into a high-speed mixer according to the mass percentage of 200:1, and carrying out high-speed mixing at the rotating speed of 2500r/min for 5min to obtain a premix;
b. and (b) adding the premix in the step (a) into a high-temperature extruder, carrying out melt mixing, cooling and tabletting, wherein the temperature of a melting section in the high-temperature extruder is set to be 105-115 ℃, the temperature of a mixing section is set to be 100-110 ℃, the rotating speed of a melt mixing screw is set to be 45Hz, and then carrying out fine pulverization on the tabletting material, and sieving the particle size until D50 is 23-25 mu m powder particles, thus obtaining the powder in the comparative example 2.
Comparative example 3
The antistatic powder coating of comparative example 3 was prepared from the following A, B components in weight percent 200: 1:
the component A comprises the following raw materials in percentage by weight:
resin: 80.0 percent
Curing agent: 6.0 percent
Leveling agent: 1.2 percent of
Defoaming agent: 0.3 percent of
Coupling agent: 1.0 percent
An electrization agent: 0.5 percent
Other auxiliary agents: 2.5 percent
Pigment and filler: 8.5 percent
The component B comprises the following raw materials in percentage by weight:
graphene modified conductive additive: 35.7 percent
Organic acid modified stabilizer: 59.0 percent
Coupling agent: 3.2 percent of
Dispersing agent: 2.1 percent of
Wherein the resin is carboxyl-terminated polyester resin; the curing agent is triglycidyl isocyanurate; the defoaming agent is polyether modified epoxy alkyl copolymer; the coupling agent is a modified organosiloxane polymer; the graphene modified conductive additive is carbon nanotube doped polyaniline, and the organic acid stabilizer is an organic acid modified aluminosilicate compound.
Method for preparing the antistatic powder coating of comparative example 3, comprising the following operating steps:
a. putting the raw materials in the component A into a high-speed mixer according to the mass percentage, and mixing for 5min at a high speed of 2500r/min to obtain a premix;
b. and (b) adding the premix in the step (a) into a high-temperature extruder, carrying out melt mixing, cooling and tabletting, wherein the temperature of a melting section in the high-temperature extruder is set to be 105-115 ℃, the temperature of a mixing section is set to be 100-110 ℃, the rotating speed of a melt mixing screw is set to be 45Hz, and then carrying out fine pulverization on a tabletting material, and sieving the particle size until D50 is 19-21 mu m powder particles to obtain the component A powder.
c. And mixing the prepared component A powder and the component B material according to the weight ratio of 200:1, putting the mixture into micro powder agglomeration equipment, wherein the feeding speed of the agglomeration equipment is set to be 30Hz, the temperature is set to be 59-62 ℃, the operating frequency is set to be 50Hz, the pressure is set to be 20MPa, and after agglomeration time is 4min, micronizing and screening the obtained agglomerates until D50 is 23-25 mu m powder particles to obtain the powder coating of the comparative example 3.
The sample powders obtained in examples 1 to 5 of the present invention and comparative examples 1 to 3 were coated by the following coating methods, respectively: coating the pretreated 6063 aluminum plate by using a high-voltage electrostatic method or a fluidized bed method, wherein the thickness of the coating is 50-70 mu m, curing the coating at the temperature of 200-240 ℃ for 15 minutes by using a hot baking oven to obtain a coating sample plate, and performing related performance tests on the coating sample plate to obtain the following results:
comparative Table 1
Compared with examples 1-5 of the invention, in comparative example 1, the component B does not contain the composite conductive additive, in comparative example 2, the process for adding the composite conductive additive is different, and the comparative example is added through an extruder, so that the structure of the composite conductive additive is easy to damage; in comparative example 3, the graphene modified conductive additive is used, and the difference from the composite conductive additive is that no orientation alignment agent is added, and the graphene modified conductive additive is not easily uniformly arranged on the surface of the powder particles after agglomeration, so that the conductive stability of the graphene modified conductive additive is poor.
Therefore, the results of examples 1 to 5 of the antistatic powder coating prepared according to the antistatic powder coating and the preparation process of the present invention and comparative examples 1 to 3 show that the powder coating prepared by the antistatic powder coating and the preparation method of the present invention has excellent conductivity, conductive stability and good corrosion resistance. Compared with a comparative example, the composite conductive additive and the organic acid modified stabilizer are matched for use, so that the conductivity of the coating is obviously improved, and materials such as the composite conductive additive, the organic acid modified stabilizer and the like are effectively and uniformly dispersed on the surface of the powder particles through a particle agglomeration process, so that the corrosion resistance and the conductivity stability of the coating are enhanced.
In sum, the antistatic powder coating has the advantages of obvious easy conductivity, and the effects of stable conductivity, better corrosion resistance and the like are realized when a coating is formed.
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not constitute any limitation to the present invention. If various changes or modifications to the present invention are made without departing from the spirit and scope of the present invention, it is intended that the present invention encompass such changes and modifications as fall within the scope of the claims and the equivalent technology of the present invention.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. The antistatic powder coating is characterized by comprising a component A and a component B, wherein the component A and the component B are prepared according to the weight percentage of 200-20: 1;
the component A comprises the following raw materials in percentage by weight:
resin: 30.0 to 75.0 percent
Curing agent: 3.0 to 30.0 percent
Leveling agent: 0.8 to 1.5 percent
Coupling agent: 1.0-5.0%
Defoaming agent: 0.3-1.0%
An electrization agent: 0.2 to 1.0 percent
Other auxiliary agents: 0.5-5.0%
Pigment and filler: 10.0 to 45.0 percent
The sum of the weight percentages of the raw materials is 100 percent;
the component B comprises the following raw materials in percentage by weight:
composite conductive additive: 40.0 to 85.0 percent
Organic acid modified stabilizer: 10.0 to 58.0 percent
Coupling agent: 0.5-8.0%
Dispersing agent: 0.2 to 5.0 percent
The sum of the weight percentages of the components is 100 percent.
2. Antistatic powder coating according to claim 1, characterized in that: the resin comprises one or more of carboxyl-terminated polyester resin, hydroxyl-terminated polyester resin, epoxy resin, fluorocarbon resin and acrylic resin.
3. The antistatic powder coating of claim 1 wherein the curing agent comprises one or more of an epoxy resin, triglycidyl isocyanurate, hydroxyalkylamide, blocked polyisocyanate, dicyandiamide, substituted dicyandiamide, and polycarboxylic acid.
4. The antistatic powder coating of claim 1 wherein the coupling agent comprises one or more of a modified organosiloxane polymer, a siloxy modified polymer, a chromium metal complex, an alkoxy pyrophosphate compound.
5. The antistatic powder coating as claimed in claim 1, wherein the composite conductive additive is a mixture of graphene modified conductive additive and alignment agent, and the mass ratio of the graphene modified conductive additive to the alignment agent is 10-1: 1.
6. The antistatic powder coating as claimed in claim 5, wherein the graphene modified conductive additive is one or more of graphene modified polyphenol, graphene modified polypyrrole, graphene modified polythiophene, carbon nanotube doped polyaniline and carbon nanotube doped polythiophene.
7. The antistatic powder coating as claimed in claim 5 or 6, wherein the graphene modified conductive additive contains graphene, the graphene in the graphene modified conductive additive is powder graphene micro-sheets, and the carbon content is not less than 98%.
8. The antistatic powder coating of claim 5 wherein the alignment agent is one of a polyethylene modified polyamide wax, cellulose acetate butyrate, ethylene-vinyl acetate copolymer, polyvinyl alcohol polymer.
9. The antistatic powder coating of claim 1 wherein the organic acid stabilizer comprises one or more of an organic acid modified silicate compound, an aluminosilicate, a nano-scale oxide such as silica or alumina.
10. A process for preparing the antistatic powder coating according to claim 1, characterized in that it comprises the following operating steps:
a. putting the raw materials in the component A into a high-speed mixer according to mass percentage for mixing to obtain premix; the rotating speed of the high-speed mixer is 1500-;
b. b, adding the premix in the step a into a high-temperature extruder, carrying out melt mixing, cooling and tabletting to prepare a tabletting material, carrying out fine pulverization on the tabletting material, and sieving the particle size until D50 is 15-50 mu m powder particles, namely preparing the powder of the component A;
c. b, mixing the powder of the component A and the material of the component B according to the weight ratio of 200-20:1, and putting the mixture into micro powder agglomeration equipment; obtaining agglomerates; micronizing the agglomerate, and sieving to obtain powder D50 of 20-50 μm to obtain antistatic powder coating; the feeding speed of the agglomeration equipment is set to be 5-45Hz, the temperature is set to be 30-85 ℃, the operating frequency is set to be 18-50Hz, the pressure is set to be 0-20MPa, and the agglomeration time is 2-20 min.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011574451.8A CN112724776A (en) | 2020-12-25 | 2020-12-25 | Antistatic powder coating and preparation method thereof |
| PCT/CN2021/108525 WO2022134568A1 (en) | 2020-12-25 | 2021-07-27 | Antistatic powder coating and preparation method therefor |
| ZA2022/13091A ZA202213091B (en) | 2020-12-25 | 2022-12-02 | Antistatic powder coating and preparation method therefor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022134568A1 (en) * | 2020-12-25 | 2022-06-30 | 广东西敦千江粉漆科学研究有限公司 | Antistatic powder coating and preparation method therefor |
| CN115109482A (en) * | 2022-08-09 | 2022-09-27 | 广东银大科技有限公司 | Environment-friendly powder coating and preparation method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116004121B (en) * | 2022-12-09 | 2024-02-13 | 江南载福粉末涂料（张家港）有限公司 | High-viscosity powder coating and preparation method and application thereof |
| CN116836440B (en) * | 2023-06-12 | 2024-04-16 | 安泰宇恒科技(天津)有限公司 | Double-color conductive rubber strip and preparation method thereof |
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| CN112724776A (en) * | 2020-12-25 | 2021-04-30 | 广东西敦千江粉漆科学研究有限公司 | Antistatic powder coating and preparation method thereof |
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- 2020-12-25 CN CN202011574451.8A patent/CN112724776A/en active Pending
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2021
- 2021-07-27 WO PCT/CN2021/108525 patent/WO2022134568A1/en active Application Filing
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| CN115109482A (en) * | 2022-08-09 | 2022-09-27 | 广东银大科技有限公司 | Environment-friendly powder coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
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| WO2022134568A1 (en) | 2022-06-30 |
| ZA202213091B (en) | 2023-04-26 |
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