CN117363174B - Powder coating for battery guard board and preparation method and application thereof - Google Patents
Powder coating for battery guard board and preparation method and application thereof Download PDFInfo
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- CN117363174B CN117363174B CN202311306487.1A CN202311306487A CN117363174B CN 117363174 B CN117363174 B CN 117363174B CN 202311306487 A CN202311306487 A CN 202311306487A CN 117363174 B CN117363174 B CN 117363174B
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- alcohol
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- 238000000576 coating method Methods 0.000 title claims abstract description 124
- 239000011248 coating agent Substances 0.000 title claims abstract description 116
- 239000000843 powder Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000006229 carbon black Substances 0.000 claims abstract description 51
- 239000003607 modifier Substances 0.000 claims abstract description 31
- 239000003822 epoxy resin Substances 0.000 claims abstract description 19
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 19
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000003063 flame retardant Substances 0.000 claims abstract description 10
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 8
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims abstract description 5
- 239000000049 pigment Substances 0.000 claims abstract description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 5
- 244000028419 Styrax benzoin Species 0.000 claims abstract description 4
- 235000000126 Styrax benzoin Nutrition 0.000 claims abstract description 4
- 235000008411 Sumatra benzointree Nutrition 0.000 claims abstract description 4
- 229960002130 benzoin Drugs 0.000 claims abstract description 4
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims abstract description 4
- 235000019382 gum benzoic Nutrition 0.000 claims abstract description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 81
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 52
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 claims description 52
- 239000007864 aqueous solution Substances 0.000 claims description 36
- 239000000243 solution Substances 0.000 claims description 35
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 16
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 239000006185 dispersion Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 2
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 2
- 239000004359 castor oil Substances 0.000 claims description 2
- 235000019438 castor oil Nutrition 0.000 claims description 2
- 229920006217 cellulose acetate butyrate Polymers 0.000 claims description 2
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 33
- 230000032683 aging Effects 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 12
- 239000000126 substance Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004843 novolac epoxy resin Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000007590 electrostatic spraying Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 235000010215 titanium dioxide Nutrition 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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
- C09D163/04—Epoxynovolacs
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
-
- 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
- C09D5/18—Fireproof paints including high temperature resistant 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Landscapes
- 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 relates to the technical field of coatings, in particular to a powder coating for a battery protection plate, and a preparation method and application thereof. The powder coating of the present invention contains: phenolic epoxy resin, bisphenol A epoxy resin, dicyandiamide, flatting agent, benzoin, polytetrafluoroethylene modified wax, flame retardant, barium sulfate, pigment 0 and insulating carbon black modifier. The powder coating disclosed by the invention meets the mechanical performance requirements of impact resistance and the like, is excellent in temperature resistance, flame retardance and ageing resistance, and has a durable coating and an excellent insulating effect.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a powder coating for a battery protection plate, and a preparation method and application thereof.
Background
In recent years, the strategy of green and sustainable development is always promoted in China, some coating industries such as paint, electroplating and the like with serious pollution are gradually replaced, the application field of powder coating is wider and wider as the coating with the emission of VOC (volatile organic compound) close to zero, and the promotion of changing paint into powder in various large fields is faster and faster in recent years. New energy automobiles are rapidly developed in China, the safety preparation of new energy batteries is focused by wide consumers, and a paint capable of improving the safety performance of the new energy batteries is favored by vast automobile enterprises.
Under the conditions of short circuit, electric leakage and the like of the battery, the new energy battery guard board needs to exert the insulation and fireproof performances of the new energy battery guard board to ensure the safety of passengers in the vehicle. The common powder coating is difficult to withstand high pressure, and is easy to break down so as to lead the whole metal car body to conduct electricity, and the special powder coating can meet the requirements of insulation, fire resistance, high-low temperature change, high adhesive strength with a structure and the like.
Disclosure of Invention
The invention is based on the solution of the technical problems, so that the powder coating for the battery guard plate, and the preparation method and the application thereof are provided. The powder coating product for the battery guard plate, disclosed by the invention, meets the mechanical performance requirements of impact resistance and the like of a coating of the powder coating, is excellent in temperature resistance, flame retardance and ageing resistance, and has a durable coating and an excellent insulating effect.
In one aspect, the present invention provides a powder coating for a battery protection plate, comprising, in parts by weight: 20-40 parts of phenolic epoxy resin, 15-35 parts of bisphenol A type epoxy resin, 2-8 parts of dicyandiamide, 0.1-3 parts of flatting agent, 0.1-2 parts of benzoin, 0.3-2 parts of polytetrafluoroethylene modified wax, 5-10 parts of flame retardant, 10-30 parts of barium sulfate, 0.8-25 parts of pigment and 2-10 parts of insulating carbon black modifier.
The invention uses the matching of the phenolic epoxy resin and the bisphenol A type epoxy resin, and can provide excellent mechanical property, heat resistance and insulation effect for the coating. The mass ratio of the phenolic epoxy resin to the bisphenol A epoxy resin is (1.2-1.8): the powder coating obtained in the range 1 has the best mechanical property, heat resistance and insulation effect.
The insulating carbon black is used in the coating, so that the insulating property of the coating can be improved to a certain extent; however, it may cause a decrease in the mechanical properties of the coating. Therefore, in order to endow the coating with excellent insulating property and mechanical and heat-resistant properties, the invention creatively uses gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane to modify insulating carbon black to obtain an insulating carbon black modified substance, and then the insulating carbon black modified substance is applied to a powder coating system. The modified insulating carbon black can obviously enhance the insulating effect of the powder coating and at least improve the mechanical and heat resistance of the coating. In particular, when the mass ratio of the gamma-glycidyl ether propyl trimethoxysilane to the methacryloxypropyl trimethoxysilane in the modifier is (1.5-2.5): 1, the insulating carbon black modified material obtained by modification is applied to the system of the invention, and the obtained coating has better effect.
Further, the phenolic epoxy resin in the coating of the present invention is used in an amount of 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39 parts by mass, or in a range between any two of the above.
Further, the bisphenol a type epoxy resin in the coating material of the present invention is used in an amount of 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34 parts by mass, or in a range between any two of the above-mentioned values.
Further, the mass ratio of the novolac epoxy resin to the bisphenol a epoxy resin in the coating of the present invention is (1.2-1.8) based on the enhancement of mechanical properties, heat resistance and insulation effects: 1. (1.3-1.8): 1. (1.3-1.7): 1 or (1.4-1.7): 1.
further, the dicyandiamide is used in the coating of the present invention in an amount of 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5 parts by mass, or in a range between any two of the above-mentioned values.
Further, the leveling agent in the coating of the present invention is used in an amount of 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.7, 2.8, 2.9 parts by mass, or in a range between any two of the above. The leveling agent comprises at least one of acrylic resin leveling agent, organic silicon leveling agent, cellulose acetate butyrate, hydrogenated castor oil and polyvinyl butyral.
Further, the benzoin in the coating of the present invention is used in an amount of 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 parts by mass, or parts by mass in a range between any two of the above.
Further, the polytetrafluoroethylene modified wax in the coating of the present invention is used in an amount of 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 parts by mass, or in a range between any two of the above.
Further, the flame retardant is used in the coating of the present invention in an amount of 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5 parts by mass, or in a range between any two of the above-mentioned values. The flame retardant comprises at least one of ammonium polyphosphate, aluminum hydroxide, magnesium hydroxide, zinc borate and antimony trioxide.
Further, the amount of barium sulfate used in the coating of the present invention is 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 parts by mass, or parts by mass in the range between any two of the above.
Further, the pigment in the coating material of the present invention is used in an amount of 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 parts by mass, or in a range between any two of the above-mentioned values. The pigment comprises at least one of titanium white, zinc oxide, lithopone, iron oxide yellow, sun-proof yellow, phthalocyanine blue, ultramarine, phthalocyanine green, chromium oxide green and iron oxide red.
Further, the amount of the insulating carbon black modifier used in the coating composition of the present invention is 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5 parts by mass, or a range between any two of the above.
Further, the insulating carbon black modifier includes modified products using gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane based on the need to enhance the insulating, mechanical and heat resistant properties of the powder coating.
Further, in order to further enhance the insulation, mechanical and heat resistance properties of the powder coating, the mass ratio of the gamma-glycidyl ether propyl trimethoxysilane to the methacryloxypropyl trimethoxysilane is (1.5-2.5): 1. (1.6-2.4): 1. (1.7-2.3): 1 or (1.8-2.2): 1.
further, the preparation method of the insulating carbon black modifier comprises the following steps: 1) Dispersing the insulating carbon black and an alcohol aqueous solution; 2) Adding a solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane, and continuing the dispersion treatment; 3) And centrifuging, taking the lower layer, and drying to obtain the insulating carbon black modified substance.
Further, the alcohol in the step 1) is at least one of methanol and ethanol.
Further, the mass concentration of the alcohol in the aqueous solution of the alcohol in the step 1) is 35-85%, or any value of 40%, 45%, 55%, 60%, 65%, 70%, 75%, 80% and a range between any two points thereof.
Further, the mass ratio of the insulating carbon black to the aqueous solution of the alcohol in the step 1) is 1: (5-100), 1: (6-80), 1: (7-60) or 1: (8-40).
Further, the mass ratio of the solution of the gamma-glycidyl ether propyl trimethoxysilane and the methacryloxypropyl trimethoxysilane to the insulating carbon black in the step 2) is (0.05-1): 1. (0.1-1): 1. (0.2-0.9): 1 or (0.3-0.6): 1.
further, the solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane in step 2) is a mixture of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane with an aqueous solution of alcohol.
Further, the aqueous solution of the alcohol in the step 2) is an aqueous solution of at least one of methanol and ethanol.
Further, the mass concentration of the alcohol in the aqueous solution of the alcohol in the step 2) is 35-85%, or any value of 40%, 45%, 55%, 60%, 65%, 70%, 75%, 80% and a range between any two points thereof.
Further, the mass ratio of the total mass of the gamma-glycidyl ether propyl trimethoxysilane and the methacryloxypropyl trimethoxysilane to the aqueous alcohol solution in the step 2) is (0.005-0.2): 1. (0.01-0.2): 1. (0.05-0.15): 1 or (0.08-0.12): 1.
further, the mass ratio of the gamma-glycidyl ether propyl trimethoxysilane to the methacryloxypropyl trimethoxysilane in the step 2) is (1.5-2.5): 1. (1.6-2.4): 1. (1.7-2.3): 1 or (1.8-2.2): 1.
further, the dispersing treatment in the steps 1) and 2) is ultrasonic dispersion. The power of the ultrasonic dispersion is further selected to be 50-800W, 100-700W, 100-600W or 150-500W, respectively. The frequency is 10-100KHz, 15-90KHz, 15-70KHz or 20-50KHz. The ultrasonic time is 0.2-5 hours, 0.2-4 hours, 0.2-3 hours or 0.3-2 hours.
Further, the drying temperature in the step 3) is 90-120 ℃, 100-118 ℃, 102-115 ℃ or 105-110 ℃. The water content is 10%, 9%, 8% or 7% or less of the mass of the dried product.
Further, the preparation method of the insulating carbon black modifier comprises the following steps: 1) Dispersing the insulating carbon black and an alcohol aqueous solution, wherein the alcohol is at least one of methanol and ethanol aqueous solution, the mass concentration of the alcohol in the alcohol aqueous solution is 35-85%, and the mass ratio of the insulating carbon black to the alcohol aqueous solution is 1: (5-100);
2) Adding a solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane, and continuing the dispersion treatment; wherein the mass ratio of the solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane to the insulating carbon black is (0.05-1): the solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane is a mixture of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane and aqueous solution of alcohol, the aqueous solution of alcohol is at least one of methanol and ethanol, the mass concentration of alcohol in the aqueous solution of alcohol is 35-85%, and the mass ratio of the total mass of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane to the aqueous solution of alcohol is (0.005-0.2): the mass ratio of the gamma-glycidyl ether propyl trimethoxysilane to the methacryloxypropyl trimethoxysilane is (1.5-2.5): 1,
3) And centrifuging, taking the lower layer, and drying until the water content is lower than 10 mass percent to obtain the insulating carbon black modified substance.
On the other hand, the invention provides a preparation method of the powder coating for the battery guard plate, which comprises the following steps:
(1) Weighing raw materials, and adding the raw materials into a mixer for uniform mixing to obtain a mixture;
(2) Adding the mixture obtained in the step (1) into an extruder, and extruding to obtain an extruded material;
(3) And (3) adding the extruded material in the step (2) into a pulverizer, pulverizing, and screening to obtain the powder coating for the battery guard plate.
Further, the extruder in the step (2) is a twin-screw extruder.
Further, the extrusion temperature in the step (2) is 70-98 ℃, 75-98 ℃, 80-98 ℃ or 85-95 ℃.
Further, the screening particle size of the step (3) is 100-800 mesh, 150-600 mesh, 200-500 mesh or 250-400 mesh.
In another aspect, the invention provides a use comprising the use of a powder coating for the battery guard to obtain a coating.
The beneficial effects are that:
the powder coating product for the battery guard plate, disclosed by the invention, meets the mechanical performance requirements of impact resistance and the like of a coating of the powder coating, is excellent in temperature resistance, flame retardance and ageing resistance, and has a durable coating and an excellent insulating effect.
The coating has excellent insulating effect, and the insulating value of the coating obtained by the coating reaches 524Mohm under the high pressure of 0.0195mA and 2000V, wherein the leakage current of the 10% saline solution is as low as 0.0195 mA.
The phenolic epoxy resin and the bisphenol A type epoxy resin in the coating system have a mutual promotion relationship in promoting the coating insulation effect of the coating. The mass ratio of the two is (1.2-1.8): in the range of 1, the coating obtained by the coating has better insulating effect.
The gamma-glycidyl ether propyl trimethoxy silane and the methacryloxypropyl trimethoxy silane are matched to enable the insulating carbon black modifier to exert a better insulating effect, so that the insulating property of the coating is enhanced. The mass ratio of the gamma-glycidyl ether propyl trimethoxysilane to the methacryloxypropyl trimethoxysilane is (1.5-2.5): 1, the effect of reducing the leakage performance of the obtained coating is better.
The coating obtained by the coating disclosed by the invention has excellent heat resistance, heat conduction correlation, flame retardance and impact resistance. The heat conductivity coefficient of the coating obtained by the coating is as low as 0.75W/mK, the flame retardant grade reaches V0 grade, and the impact resistance reaches 68.27/cm.
The collocation of the phenolic epoxy resin and the bisphenol A type epoxy resin in the coating system can obviously enhance the heat-resistant heat-conducting property and the shock resistance of the coating. The dosage ranges of the two are (1.2-1.8): 1, the heat-resistant and heat-conducting effects and the impact-resistant mechanical property effects of the coating are relatively good.
According to the invention, gamma-glycidyl ether propyl trimethoxy silane and methacryloxy propyl trimethoxy silane are used for modifying the insulating carbon black, so that the compatibility effect of the insulating carbon black modifier in a system is improved, and the heat resistance and heat conduction effect of the coating and the shock resistance of the coating can be improved. And the mass ratio of the two also affects the heat conduction and impact resistance of the coating to a large extent.
Detailed Description
The advantages and various effects of the present invention will be more clearly apparent from the following description of the present invention. It will be appreciated by those skilled in the art that these embodiments are intended to illustrate the invention, not to limit the invention.
1. Preparation of powder coating
1. Preparation of insulating carbon modifier
Preparation of insulating carbon modifier Q1:
1) Carrying out dispersion treatment on an aqueous solution of the Mitsubishi insulating carbon black MA-100R in Japan and alcohol under the conditions that the ultrasonic power is 200W and the frequency is 42KHz for 0.5 hour; the alcohol is an aqueous solution of ethanol, the mass concentration of the alcohol in the aqueous solution of the alcohol is 75%, and the mass ratio of the insulating carbon black to the aqueous solution of the alcohol is 1:20, a step of;
2) Adding a solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane, and continuing the dispersion treatment; wherein, the mass ratio of the solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane to the insulating carbon black is 0.2: the solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane is a mixture of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane and aqueous alcohol solution, the aqueous alcohol solution is aqueous alcohol solution, the mass concentration of alcohol in the aqueous alcohol solution is 75%, and the mass ratio of the total mass of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane to the aqueous alcohol solution is 0.1:1, the mass ratio of the gamma-glycidyl ether propyl trimethoxysilane to the methacryloxypropyl trimethoxysilane is 2:1,
3) And centrifuging, taking the lower layer, and drying at 105 ℃ until the water content is 7.8 mass percent to obtain the insulating carbon black modified substance.
Preparation of insulating carbon modifier Q2:
1) Carrying out dispersion treatment on an aqueous solution of the Mitsubishi insulating carbon black MA-100R in Japan and alcohol under the conditions that the ultrasonic power is 200W and the frequency is 40KHz for 0.6 hour; the alcohol is an aqueous solution of ethanol, the mass concentration of the alcohol in the aqueous solution of the alcohol is 80%, and the mass ratio of the insulating carbon black to the aqueous solution of the alcohol is 1:15;
2) Adding a solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane, and continuing the dispersion treatment; wherein, the mass ratio of the solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane to the insulating carbon black is 0.22: the solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane is a mixture of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane and aqueous alcohol solution, the aqueous alcohol solution is aqueous alcohol solution, the mass concentration of alcohol in the aqueous alcohol solution is 80%, and the mass ratio of the total mass of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane to the aqueous alcohol solution is 0.08:1, the mass ratio of the gamma-glycidyl ether propyl trimethoxysilane to the methacryloxypropyl trimethoxysilane is 1.5:1,
3) And centrifuging, taking the lower layer, and drying at the temperature of 102 ℃ until the water content is 7.2 mass percent to obtain the insulating carbon black modified substance.
Preparation of insulating carbon modifier Q3:
1) Carrying out dispersion treatment on an aqueous solution of the Mitsubishi insulating carbon black MA-100R in Japan and alcohol under the conditions that the ultrasonic power is 200W and the frequency is 40KHz for 0.8 hour; the alcohol is an aqueous solution of ethanol, the mass concentration of the alcohol in the aqueous solution of the alcohol is 65%, and the mass ratio of the insulating carbon black to the aqueous solution of the alcohol is 1:30;
2) Adding a solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane, and continuing the dispersion treatment; wherein, the mass ratio of the solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane to the insulating carbon black is 0.15: the solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane is a mixture of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane and aqueous alcohol solution, the aqueous alcohol solution is aqueous alcohol solution, the mass concentration of alcohol in the aqueous alcohol solution is 65%, and the mass ratio of the total mass of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane to the aqueous alcohol solution is 0.15: the mass ratio of the gamma-glycidyl ether propyl trimethoxysilane to the methacryloxypropyl trimethoxysilane is 5.5:1,
3) And centrifuging, taking the lower layer, and drying at the temperature of 102 ℃ until the water content is 7.2 mass percent to obtain the insulating carbon black modified substance.
Preparation of insulating carbon modifier Q4: the difference from the preparation of insulating carbon modifier Q1 alone is that gamma-glycidyl ether propyl trimethoxysilane was not used, and the amount of gamma-glycidyl ether propyl trimethoxysilane used in the preparation of Q1 was increased to methacryloxypropyl trimethoxysilane.
Preparation of insulating carbon modifier Q5: the difference from the preparation of insulating carbon modifier Q1 alone is that methacryloxypropyl trimethoxysilane was not used and the amount of methacryloxypropyl trimethoxysilane used in the preparation of Q1 was increased to gamma-glycidylether propyl trimethoxysilane.
Preparation of insulating carbon modifier Q6: the preparation of the insulating carbon modifier Q1 is only different from that of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane in a mass ratio of 1:1.
preparation of insulating carbon modifier Q7: the preparation of the insulating carbon modifier Q1 is only different from that of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane in a mass ratio of 3:1.
2. composition of powder coating
The raw materials of the powder coating and the dosage thereof are shown in table 1, and the dosage is mass part; wherein, the phenolic epoxy resin and the bisphenol A type epoxy resin are marked as A value.
Table 1: composition of powder coating
Coating 8: the raw material composition differs from coating 1 only in that the insulating carbon black modifier used is Q4.
Coating 9: the raw material composition differs from coating 1 only in that the insulating carbon black modifier used is Q5.
Coating 10: the raw material composition differs from coating 1 only in that the insulating carbon black modifier used is Q6.
Coating 11: the raw material composition differs from coating 1 only in that the insulating carbon black modifier used is Q7.
3. Preparation method of powder coating
The preparation method of the powder coating 1-11 comprises the following steps: (1) Weighing the raw materials according to the above dosage, and then adding the raw materials into a mixer for uniform mixing; (2) Adding the mixed materials into a double-screw extruder for extrusion, wherein the extrusion temperature is 92 ℃, the rotation speed of a main machine is 420rpm, and the feeding rotation speed is 35rpm, so as to obtain an extrudate; (3) And (3) putting the extrudate into a pulverizer, grinding and sieving to obtain the powder coating with the particle size of 200-500 meshes.
2. Preparation of the coating
And spraying a layer of coating with the thickness of 0.12mm on the outer surface of the metal shell of the lithium battery by adopting an electrostatic spraying method on the powder coating 1-11, and then curing for 30 minutes at 230 ℃ to form the coating 1-11.
3. Performance testing of coatings
(1) Test of insulation effect
The insulating effect of the coatings 1-11 is shown in Table 2. Wherein the insulation effect of the coating was characterized using the leakage of 10% saline solution and the insulation value at high voltage of 2000V.
Table 2: insulation effect test
As is clear from Table 2, the coating of the present invention has excellent insulating effect, and the coating obtained from the coating of the present invention has an insulation value of 524Mohm at a high voltage of 2000V at a leakage current of 0.0195mA as low as that of a 10% saline solution, and can impart excellent insulating effect to a battery protection plate.
As is clear from a comparison of the coating 1 and the coatings 4 to 7, the novolac epoxy resin F-51 and the bisphenol A epoxy resin E-41 have a mutual promoting relationship in promoting the coating insulation effect of the paint. When the mass ratio of the two is (1.2-1.8): in the range of 1, the coating obtained by the coating has better insulating effect.
As can be seen from the comparison of the coatings 1 and 8-11, the gamma-glycidyl ether propyl trimethoxy silane and the methacryloxy propyl trimethoxy silane used in the invention can enable the insulating carbon black modifier to exert better insulating effect, thereby enhancing the insulating property of the coating, and compared with the insulating carbon black modifier obtained by modifying the insulating carbon black, the gamma-glycidyl ether propyl trimethoxy silane and the methacryloxy propyl trimethoxy silane used in the invention when applied in the coating, the gamma-glycidyl ether propyl trimethoxy silane and the methacryloxy propyl trimethoxy silane are matched, so that the coating has better insulating effect, and the electric leakage influence of a guard plate is reduced. And when the mass ratio of the two is (1.5-2.5): 1, the effect of reducing the leakage performance of the obtained coating is better.
(2) Testing of heat conduction, flame retardance and impact resistance
Coatings 1-11 were subjected to heat conduction, flame retardant properties, and impact resistance properties, and the results are shown in Table 3.
Table 3: mechanical, thermal and flame retardant testing
As can be seen from the test results in Table 3, the coating obtained by the coating of the present invention has excellent heat resistance and heat conduction correlation, flame retardance and impact resistance. The heat conductivity coefficient of the coating obtained by the coating is as low as 0.75W/mK, the flame retardant grade reaches V0 grade, and the impact resistance reaches 68.27/cm.
As shown by the test results of the coatings 1 and 4-7, the phenolic epoxy resin F-51 and the bisphenol A type epoxy resin E-41 in the coating system can obviously enhance the heat-resistant heat-conducting property and the impact resistance of the coating. The dosage ranges of the two are (1.2-1.8): 1, the heat-resistant and heat-conducting effects and the impact-resistant mechanical property effects of the coating are relatively good.
The invention uses gamma-glycidyl ether propyl trimethoxy silane and methacryloxy propyl trimethoxy silane to modify the insulating carbon black, increases the compatible effect of the insulating carbon black modifier in the system, and can promote the increase of the heat-resistant and heat-conducting effects of the coating and the shock resistance of the coating. And the mass ratio of the two also affects the heat conduction and impact resistance of the coating to a large extent.
Finally, it is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (5)
1. The powder coating for the battery guard plate is characterized in that: the adhesive comprises the following components in parts by weight: 20-40 parts of phenolic epoxy resin, 15-35 parts of bisphenol A type epoxy resin, 2-8 parts of dicyandiamide, 0.1-3 parts of flatting agent, 0.1-2 parts of benzoin, 0.3-2 parts of polytetrafluoroethylene modified wax, 5-10 parts of flame retardant, 10-30 parts of barium sulfate, 0.8-25 parts of pigment and 2-10 parts of insulating carbon black modifier;
the preparation method of the insulating carbon black modifier comprises the following steps: 1) Dispersing the insulating carbon black and an alcohol aqueous solution, wherein the alcohol aqueous solution is at least one of methanol and ethanol aqueous solution, the mass concentration of the alcohol in the alcohol aqueous solution is 35-85%, and the mass ratio of the insulating carbon black to the alcohol aqueous solution is 1: (5-100);
2) Adding a solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane, and continuing the dispersion treatment; wherein the mass ratio of the solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane to the insulating carbon black is (0.05-1): the solution of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane is a mixture of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane and aqueous solution of alcohol, the aqueous solution of alcohol is at least one of methanol and ethanol, the mass concentration of alcohol in the aqueous solution of alcohol is 35-85%, and the mass ratio of the total mass of gamma-glycidyl ether propyl trimethoxysilane and methacryloxypropyl trimethoxysilane to the aqueous solution of alcohol is (0.005-0.2): the mass ratio of the gamma-glycidyl ether propyl trimethoxysilane to the methacryloxypropyl trimethoxysilane is (1.5-2.5): 1, a step of;
3) Centrifuging, taking the lower layer material, and drying until the water content is lower than 10 mass percent to obtain the insulating carbon black modified material;
the mass ratio of the phenolic epoxy resin to the bisphenol A epoxy resin is (1.2-1.8): 1, a step of;
the leveling agent comprises at least one of acrylic resin leveling agent, organic silicon leveling agent, cellulose acetate butyrate, hydrogenated castor oil and polyvinyl butyral:
the flame retardant comprises at least one of ammonium polyphosphate, aluminum hydroxide, magnesium hydroxide, zinc borate and antimony trioxide.
2. The powder coating for a battery protection plate according to claim 1, wherein: the amount of the insulating carbon black modifier is 3-8 parts.
3. The method for producing a powder coating for a battery protection sheet according to any one of claims 1 to 2, characterized in that: the method comprises the following steps:
(1) Weighing raw materials, and adding the raw materials into a mixer for uniform mixing to obtain a mixture;
(2) Adding the mixture obtained in the step (1) into an extruder, and extruding to obtain an extruded material;
(3) And (3) adding the extruded material in the step (2) into a pulverizer, pulverizing, and screening to obtain the powder coating for the battery guard plate.
4. The method for producing a powder coating for a battery protection plate according to claim 3, wherein: the screening particle size is between 150 and 600 meshes.
5. A use comprising the use of a powder coating for battery separators according to any one of claims 1 to 2 to obtain a coating.
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