CN116948494A - Insulating flame-retardant corrosion-resistant powder coating for battery and preparation method thereof - Google Patents
Insulating flame-retardant corrosion-resistant powder coating for battery and preparation method thereof Download PDFInfo
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- CN116948494A CN116948494A CN202310728600.9A CN202310728600A CN116948494A CN 116948494 A CN116948494 A CN 116948494A CN 202310728600 A CN202310728600 A CN 202310728600A CN 116948494 A CN116948494 A CN 116948494A
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 111
- 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 title claims abstract description 108
- 238000000576 coating method Methods 0.000 title claims abstract description 99
- 239000011248 coating agent Substances 0.000 title claims abstract description 96
- 230000007797 corrosion Effects 0.000 title claims abstract description 82
- 238000005260 corrosion Methods 0.000 title claims abstract description 82
- 239000000843 powder Substances 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 41
- 239000000945 filler Substances 0.000 claims abstract description 31
- 239000003822 epoxy resin Substances 0.000 claims abstract description 25
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 25
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims abstract description 21
- 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 20
- 238000005282 brightening Methods 0.000 claims abstract description 12
- -1 phenolic aldehyde Chemical class 0.000 claims abstract description 11
- 244000028419 Styrax benzoin Species 0.000 claims abstract description 10
- 235000000126 Styrax benzoin Nutrition 0.000 claims abstract description 10
- 235000008411 Sumatra benzointree Nutrition 0.000 claims abstract description 10
- 229960002130 benzoin Drugs 0.000 claims abstract description 10
- 235000019382 gum benzoic Nutrition 0.000 claims abstract description 10
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 20
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 13
- 229910052582 BN Inorganic materials 0.000 claims description 10
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 10
- 239000011787 zinc oxide Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 239000004593 Epoxy Substances 0.000 claims description 8
- 229920000877 Melamine resin Polymers 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 8
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 8
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 7
- BSYJHYLAMMJNRC-UHFFFAOYSA-N 2,4,4-trimethylpentan-2-ol Chemical compound CC(C)(C)CC(C)(C)O BSYJHYLAMMJNRC-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 3
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 2
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 2
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 2
- 125000002883 imidazolyl group Chemical group 0.000 claims description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000306 component Substances 0.000 description 3
- 239000013530 defoamer Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical group CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical group C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000002015 acyclic group Chemical group 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001336 alkenes Chemical group 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical group C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 125000002743 phosphorus functional group Chemical group 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 150000005837 radical ions Chemical class 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011179 visual inspection Methods 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
-
- 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
- C09D5/18—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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to an insulating flame-retardant corrosion-resistant powder coating for a battery and a preparation method thereof. The powder coating comprises the following components in parts by mass: 30-50 parts of bisphenol A epoxy resin, 10-30 parts of phenolic aldehyde modified epoxy resin, 10-30 parts of curing agent, 0.3-0.7 part of curing accelerator, 0.3-0.7 part of brightening agent, 0.5-1.5 parts of flatting agent, 0.2-1 part of defoaming agent, 5-15 parts of flame retardant, 0.1-1 part of benzoin and 1-10 parts of insulating filler. Compared with the coating film formed by the prior insulating flame-retardant corrosion-resistant powder coating, the coating film formed by the insulating flame-retardant corrosion-resistant powder coating for the battery has more excellent insulating property, flame-retardant property and corrosion-resistant property.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to an insulating flame-retardant corrosion-resistant powder coating for a battery and a preparation method thereof.
Background
The battery is a core component of the new energy vehicle. The service life and safety performance of a new energy vehicle are critically dependent on whether the battery can be used for a long period of time. The prior aluminum shell battery comprises a positive electrode, a negative electrode and a battery shell, wherein the electric potential of the positive electrode, the negative electrode and the battery shell is as follows from big to small in sequence: positive electrode, battery case, negative electrode. If the battery case contacts the negative electrode, corrosion occurs, and the battery case is gradually damaged. In order to prevent the occurrence of the situation, the battery shell and the positive electrode are connected together to increase the potential of the shell, so that the battery shell is protected and prevented from being corroded; the existing battery case is thus externally wrapped with a battery blue film to insulate the battery from the outside.
The powder coating is an environment-friendly high-performance coating formed by heating sintering and curing, and a formed coating has good compactness and durability. In view of the characteristics of safety, high efficiency, no pollution and the like of the powder coating, the powder coating is suitable for curing the metal surface to form a film, and plays an important role in protecting the battery of the new energy vehicle. However, the chemical resistance, impact resistance and other properties of the conventional epoxy powder coating materials are to be improved; in addition, the insulation performance, flame retardant performance and corrosion resistance of the conventional powder coating are also to be improved. The prior patent document CN103059692a discloses an epoxy resin powder coating for coating magnetic rings, but the related requirements cannot be met.
Therefore, there is a need for a powder coating capable of forming a coating film having excellent insulating properties, flame retardant properties and corrosion resistance.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects of the prior art, the insulating flame-retardant corrosion-resistant powder coating for the battery is provided to solve the problems of insufficient insulating property, flame-retardant property and corrosion-resistant property of a coating film formed by the existing powder coating.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the insulating flame-retardant corrosion-resistant powder coating for the battery comprises the following components in parts by mass: 30-50 parts of bisphenol A epoxy resin, 10-30 parts of phenolic aldehyde modified epoxy resin, 10-30 parts of curing agent, 0.3-0.7 part of curing accelerator, 0.3-0.7 part of brightening agent, 0.5-1.5 parts of flatting agent, 0.2-1 part of defoaming agent, 5-15 parts of flame retardant, 0.1-1 part of benzoin and 1-10 parts of insulating filler.
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the insulating flame-retardant corrosion-resistant powder coating for the battery comprises the following components in parts by mass: 35-45 parts of bisphenol A epoxy resin, 15-25 parts of phenolic modified epoxy resin, 15-25 parts of curing agent, 0.4-0.6 part of curing accelerator, 0.4-0.6 part of brightening agent, 0.8-1.2 parts of flatting agent, 0.4-0.8 part of defoaming agent, 7-13 parts of flame retardant, 0.1-0.5 part of benzoin and 3-7 parts of insulating filler.
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the epoxy equivalent of the bisphenol A epoxy resin is 750-800g/eq. Under the epoxy equivalent, bisphenol A epoxy resin has quicker reaction and larger crosslinking degree, and is favorable for improving the corrosion resistance of the coating.
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the softening point of the bisphenol A epoxy resin is 80-100 ℃.
As the preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the bisphenol A epoxy resin is solid epoxy resin; in some preferred embodiments of the present invention, the bisphenol a epoxy resin is an E12 type resin.
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the epoxy equivalent of the phenolic aldehyde modified epoxy resin is 180-300g/eq. The phenolic aldehyde modified epoxy resin is favorable for improving the insulating property and the corrosion resistance of the coating film under the epoxy equivalent.
In some preferred embodiments of the present invention, the phenolic modified epoxy resin is NPCN-702.
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the curing agent is a phenolic curing agent, and the phenolic hydroxyl equivalent of the curing agent is 230-350g/eq; in some preferred embodiments of the invention, the curative is model KD420. According to the actual situation, the proper phenolic hydroxyl equivalent weight is selected
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the curing accelerator is imidazole and modified substances thereof; in some preferred embodiments of the present invention, the cure accelerator is 2-methylimidazole.
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the brightening agent is a copolymer of butyl acrylate and methyl methacrylate; in some preferred embodiments of the invention, the brightening agent is a 701 aid.
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the leveling agent is an acrylic ester leveling agent; in some preferred embodiments of the invention, the leveling agent is GLP588 or Resiffow PV88.
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the defoaming agent is a wax product; in some preferred embodiments of the present invention, the defoamer is of the type BYK961.
As a preferred embodiment of the insulating flame retardant corrosion resistant powder coating for a battery according to the present invention, the flame retardant includes a functional flame retardant including expandable graphite and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and a halogen-free flame retardant including Melamine (MA), melamine Cyanurate (MCA), ammonium polyphosphate and pentaerythritol. The 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), melamine (MA) and Melamine Cyanurate (MCA) in the flame retardant disclosed by the invention have good P-N synergistic effect, can achieve the flame retardant effect under a low addition amount, and are beneficial to improving the flame retardant property of a coating film. When the coating film is heated by fire, the functional flame retardant and the halogen-free flame retardant react to play a role in flame retardance and fire prevention.
It should be noted that the action principle of the expandable graphite flame retardance is as follows: the expandable graphite is capable of forming a tough carbon layer on the polymer surface, thereby isolating the combustible from the heat source; the expandable graphite can absorb a large amount of heat in the expansion process, so that the temperature of the system is reduced; the expandable graphite can release acid radical ions in the graphite interlayer during the expansion process, promote dehydration and carbonization, and can combine with free radicals generated by combustion so as to interrupt chain reaction; finally, a good flame-retardant effect is achieved through various flame-retardant modes. The addition of expandable graphite is beneficial to improving the flame retardant property of the coating film.
The flame retardant principle of 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) is as follows: the 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) structure contains P-H bond, has extremely activity on olefin, epoxy bond and carbonyl, and can react to generate a plurality of derivatives; the 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and the derivatives thereof have the advantages that the molecular structure contains a biphenyl ring and a phenanthrene ring structure, particularly, a lateral phosphorus group is introduced in a mode of a cyclic O=P-O bond, and compared with the general acyclic organic phosphate, the thermal stability and the chemical stability are high, the flame retardant performance can be better, and the flame retardant performance of a coating film is improved.
The Melamine (MA) and Melamine Cyanurate (MCA) have higher N content, so that the N content of the flame-retardant system can be complemented, P/N synergistic flame retardance is realized, the P content in the system is effectively reduced, and the preparation of the flame-retardant EP material with low P content is realized.
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the insulating filler is at least one of aluminum oxide, zinc oxide and hexagonal boron nitride. The aluminum oxide, the zinc oxide and the hexagonal boron nitride have good insulating performance and corrosion resistance, and are beneficial to improving the insulating performance and the corrosion resistance of the coating.
As a preferred scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the insulating filler comprises aluminum oxide, zinc oxide and hexagonal boron nitride, wherein the mole ratio of the zinc oxide to the aluminum oxide to the hexagonal boron nitride is 1:1:1.
as a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for a battery, the zinc oxide is spherical, the aluminum oxide is spherical, and the hexagonal boron nitride is flaky.
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the particle size of the aluminum oxide is 100-200nm; the particle size of the zinc oxide is 100-200nm; the plane size of the hexagonal boron nitride is 1-10 mu m. The particle size and the size of the insulating filler reach the nanometer level, which is beneficial to improving the insulating property and the corrosion resistance of the coating film.
As a preferable scheme of the insulating flame-retardant corrosion-resistant powder coating for the battery, the particle size of the aluminum oxide is 120-180nm; the particle size of the zinc oxide is 120-180nm; the plane size of the hexagonal boron nitride is 3-5 mu m. The particle size and the size of the insulating filler reach the nanometer level, which is beneficial to improving the insulating property and the corrosion resistance of the coating film.
One of the purposes of the invention has the following beneficial effects: compared with the coating film formed by the prior insulating flame-retardant corrosion-resistant powder coating, the coating film formed by the insulating flame-retardant corrosion-resistant powder coating for the battery has excellent insulating property, flame-retardant property and corrosion-resistant property.
The second object of the present invention is: aiming at the defects of the prior art, the invention provides a preparation method of an insulating flame-retardant corrosion-resistant powder coating for a battery.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the preparation method of the insulating flame-retardant corrosion-resistant powder coating for the battery, provided by any one of the purposes, comprises the following steps:
s1: heating bisphenol A epoxy resin and phenolic aldehyde modified epoxy resin to melt, and stirring to obtain a melt;
s2: adding an insulating filler into the melt in the step S1, and sequentially stirring, vacuum pressurizing, discharging, cooling and melt extruding to obtain a pre-dispersion;
s3: adding a curing agent, a curing accelerator, a brightening agent, a leveling agent, a defoaming agent, benzoin and a flame retardant into the pre-dispersion in the step S2, and stirring to obtain a mixture;
s4: and (3) sequentially carrying out melt extrusion, tabletting crushing, grinding and sieving on the mixture in the step (S3) to obtain the insulating flame-retardant corrosion-resistant powder coating for the battery.
The second purpose of the invention is that: according to the invention, through a twice melt extrusion method, the compatibility of the insulating filler and the high polymer can be obviously improved, so that the insulating filler can be effectively dispersed in the powder coating, and the corrosion resistance and mechanical property of the coating film can be improved.
The third object of the present invention is to: aiming at the defects of the prior art, the invention provides an application of an insulating flame-retardant corrosion-resistant powder coating for a battery.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the application of the insulating flame-retardant corrosion-resistant powder coating for the battery in the battery shell, the copper bar and the outer surface insulating layer of the motor rotor is disclosed.
The insulating flame-retardant corrosion-resistant powder coating for the battery is applied to a battery shell, so that a coating film with excellent insulating property, flame retardant property and corrosion resistance is formed on the battery shell.
The insulating flame-retardant corrosion-resistant powder coating for the battery is applied to the insulating part of the copper bar, so that a coating film with excellent insulating performance, flame-retardant performance and corrosion resistance is formed on the insulating part of the copper bar.
The insulating flame-retardant corrosion-resistant powder coating for the battery is applied to the outer surface of the motor rotor, so that a coating film with excellent insulating property, flame retardant property and corrosion resistance is formed on the outer surface of the motor rotor.
The third purpose of the invention has the following beneficial effects: compared with the coating film formed by the prior insulating flame-retardant corrosion-resistant powder coating, the coating film formed by the insulating flame-retardant corrosion-resistant powder coating for the battery has excellent insulating property, flame-retardant property and corrosion-resistant property.
Detailed Description
In order to make the technical solution and advantages of the present invention more apparent, the present invention and its advantageous effects will be described in further detail below with reference to the specific embodiments, but the embodiments of the present invention are not limited thereto.
Example 1
The insulating flame-retardant corrosion-resistant powder coating for the battery in the embodiment comprises the following components in parts by mass: 40 parts of bisphenol A epoxy resin, 20 parts of phenolic aldehyde modified epoxy resin, 20 parts of curing agent, 0.5 part of curing accelerator, 0.5 part of brightening agent, 1 part of flatting agent, 0.5 part of defoamer, 10 parts of flame retardant, 0.5 part of benzoin and 5 parts of insulating filler.
Specifically, the model of the curing agent is KD420; the curing accelerator is 2-methylimidazole; the brightening agent is 701 auxiliary agent; the leveling agent is Resiffow PV88; the model of the defoamer is BYK961; the insulating filler comprises aluminum oxide, zinc oxide and hexagonal boron nitride, and the mol ratio of the zinc oxide to the aluminum oxide to the hexagonal boron nitride is 1:1:1, a step of; benzoin is used for eliminating bubbles of molten powder coating and reducing coating defects.
The preparation method of the insulating flame-retardant corrosion-resistant powder coating for the battery in the embodiment comprises the following steps:
s1: adding 40 parts by mass of bisphenol A epoxy resin and 20 parts by mass of phenolic aldehyde modified epoxy resin into a dispersing pot, heating to 100 ℃ for melting, and stirring at a high speed to obtain a melting material.
S2: and adding 5 parts by mass of insulating filler into the melt, stirring for 30min, vacuumizing for 60min, pressurizing with nitrogen for 30min, discharging, cooling, adding into a double-screw extruder, melting and blending at 100 ℃, tabletting, and discharging to obtain the pre-dispersion.
S3: adding 20 parts by mass of curing agent, 0.5 part by mass of curing accelerator, 0.5 part by mass of brightening agent, 1 part by mass of leveling agent, 0.5 part by mass of defoaming agent, 10 parts by mass of flame retardant, 0.5 part by mass of benzoin and the pre-dispersion into a high-speed dispersion pot, and stirring for 15min to obtain a mixture.
S4: pouring the mixture into a double-screw extruder for melt extrusion, wherein the temperature of the zone I is 100 ℃, and the temperature of the zone II is 105 ℃; and (3) performing tabletting and crushing after melt extrusion, grinding by using an ACM (ACM) grading mill, and passing through a 180-mesh standard sieve to obtain the insulating flame-retardant corrosion-resistant powder coating for the battery.
Example 2
The mass part of the insulating filler in example 1 was changed to 3 parts, and the other was the same as in example 1.
Example 3
The mass part of the insulating filler in example 1 was changed to 7 parts, and the other was the same as in example 1.
Example 4
The mass part of the flame retardant in example 1 was changed to 7 parts, and the other was the same as in example 1.
Example 5
The mass part of the flame retardant in example 1 was changed to 13 parts, and the other was the same as in example 1.
Example 6
The mass part of bisphenol a epoxy resin in example 1 was changed to 35 parts, and the mass part of the phenolic-modified epoxy resin was changed to 25 parts, otherwise the same as in example 1.
Example 7
The mass part of bisphenol A epoxy resin in example 1 was changed to 45 parts, and the mass part of the phenolic aldehyde-modified epoxy resin was changed to 15 parts, otherwise the same as in example 1.
Comparative example 1
The procedure of example 1 was repeated except that the insulating filler was not added.
Comparative example 2
The procedure of example 1 was repeated except that the flame retardant was not added.
The insulating flame-retardant corrosion-resistant powder coatings for batteries prepared in examples 1 to 7 and comparative examples 1 to 2 were electrostatically sprayed on the treated steel sheet and aluminum sheet, and cured at 200℃for 15 minutes. The thickness of the coating film was 150.+ -.20. Mu.m. The performance of each example and each comparative example was then tested according to table 1 and the performance test results for each example and each comparative example are shown in table 2.
TABLE 1 relevant test contents and criteria for powder coatings in this example
| Performance of | Test standard | Index (I) |
| Appearance of the coating | Visual inspection | Whether or not to level, whether or not there is a crack |
| Impact Strength | GB/T 1732-1993 | ≥50kg.cm |
| Shear adhesion | GB/T 7124-2008 | — |
| Resistance to brine soaking | ISO 2812-2007 | — |
| Neutral salt fog resistance | GB/T 1771-2007 | — |
| Breakdown strength of | GB/T 1408.1-2016 | — |
| Insulating property | ICE 60243 | ≥500MΩ |
| Flame retardant Properties | UL 94-2015 | V-0 |
| Moist heat resistance (double 85 aging) | GB/T 1740-2007 | 1000 hours coating has no bubble and drop off |
TABLE 2 Performance test results for examples 1-7 and comparative examples 1-2
From the analysis of table 2, example 1 has excellent insulation properties, flame retardant properties, corrosion resistance and mechanical properties.
Example 1 was added with insulating filler, whereas comparative example 1 was not added with insulating filler; example 1 has better mechanical properties, corrosion resistance and insulation properties than comparative example 1.
Example 1 was added with flame retardant, while comparative example 2 was not added with flame retardant; example 1 has better flame retardant properties than comparative example 2, however the presence of the flame retardant inevitably slightly degrades other properties.
Example 1 was added with 5 parts by mass of insulating filler, whereas example 2 was added with 3 parts by mass of insulating filler, the content of insulating filler in example 2 being relatively low; compared with example 2, example 1 has better corrosion resistance and insulation performance; example 2 does not have good corrosion resistance and insulation properties due to the low content of the insulating filler.
Example 1 was added with 5 parts by mass of insulating filler, whereas example 3 was added with 7 parts by mass of insulating filler, the content of insulating filler in example 3 being relatively high; example 1 has better corrosion resistance and mechanical properties than example 3; example 3 does not have good corrosion resistance and mechanical properties due to the high content of insulating filler, and too much insulating filler increases the manufacturing cost of the powder coating.
Example 1 was added with 10 parts by mass of flame retardant, while example 4 was added with 7 parts by mass of flame retardant, the content of flame retardant in example 4 being relatively low; example 1 has better flame retardant properties than example 4; example 4 does not have good flame retardant properties due to its lower content of flame retardant.
Example 1 was added with 10 parts by mass of flame retardant, while example 5 was added with 13 parts by mass of flame retardant, and the content of flame retardant in example 5 was relatively large; compared with example 5, example 1 has better corrosion resistance and insulation performance; example 5 does not have good corrosion resistance and insulation properties due to the high content of flame retardant, and too much flame retardant increases the cost of manufacturing the powder coating.
Example 1 was added with 40 parts by mass of bisphenol a epoxy resin and 20 parts by mass of phenolic modified epoxy resin, while example 6 was added with 35 parts by mass of bisphenol a epoxy resin and 25 parts by mass of phenolic modified epoxy resin, with the proportion of phenolic modified epoxy resin increased in example 6; example 1 has better mechanical properties than example 6; although example 6 had better corrosion resistance, the coating film was more brittle and had poorer impact resistance, and thus, the mechanical properties were poor, and too much phenolic-modified epoxy resin increased the manufacturing cost of the powder coating.
Example 1 was added with 40 parts by mass of bisphenol a epoxy resin and 20 parts by mass of phenolic modified epoxy resin, while example 7 was added with 45 parts by mass of bisphenol a epoxy resin and 15 parts by mass of phenolic modified epoxy resin, the proportion of phenolic modified epoxy resin being reduced in example 7; example 1 has better corrosion resistance than example 7; example 7 does not have good corrosion resistance due to the reduced proportion of phenolic modified epoxy resin.
To sum up, the coating film formed by the insulating flame-retardant corrosion-resistant powder coating for batteries according to the invention has excellent insulating property, flame-retardant property and corrosion-resistant property.
Variations and modifications of the above embodiments will occur to those skilled in the art to which the invention pertains from the foregoing disclosure and teachings. Therefore, the present invention is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (10)
1. The insulating flame-retardant corrosion-resistant powder coating for the battery is characterized by comprising the following components in parts by weight: 30-50 parts of bisphenol A epoxy resin, 10-30 parts of phenolic aldehyde modified epoxy resin, 10-30 parts of curing agent, 0.3-0.7 part of curing accelerator, 0.3-0.7 part of brightening agent, 0.5-1.5 parts of flatting agent, 0.2-1 part of defoaming agent, 5-15 parts of flame retardant, 0.1-1 part of benzoin and 1-10 parts of insulating filler.
2. The insulating flame-retardant corrosion-resistant powder coating for batteries according to claim 1, characterized by comprising, in parts by mass: 35-45 parts of bisphenol A epoxy resin, 15-25 parts of phenolic modified epoxy resin, 15-25 parts of curing agent, 0.4-0.6 part of curing accelerator, 0.4-0.6 part of brightening agent, 0.8-1.2 parts of flatting agent, 0.4-0.8 part of defoaming agent, 7-13 parts of flame retardant, 0.1-0.5 part of benzoin and 3-7 parts of insulating filler.
3. The insulating flame retardant corrosion resistant powder coating for batteries according to claim 1 or 2, characterized in that: the epoxy equivalent of the bisphenol A epoxy resin is 750-800g/eq.
4. The insulating flame retardant corrosion resistant powder coating for batteries according to claim 1 or 2, characterized in that: the epoxy equivalent of the phenolic aldehyde modified epoxy resin is 180-300g/eq.
5. The insulating flame retardant corrosion resistant powder coating for batteries according to claim 1 or 2, characterized in that: the curing agent is a phenolic curing agent, and the phenolic hydroxyl equivalent of the curing agent is 230-350g/eq.
6. The insulating flame retardant corrosion resistant powder coating for batteries according to claim 1 or 2, characterized in that: the curing accelerator is imidazole and modified substances thereof.
7. The insulating flame retardant corrosion resistant powder coating for batteries according to claim 1 or 2, characterized in that: the flame retardant includes a functional flame retardant including expandable graphite and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), and a halogen-free flame retardant including Melamine (MA), melamine Cyanurate (MCA), ammonium polyphosphate, and pentaerythritol.
8. The insulating flame retardant corrosion resistant powder coating for batteries according to claim 1 or 2, characterized in that: the insulating filler is at least one of aluminum oxide, zinc oxide and hexagonal boron nitride.
9. The method for preparing the insulating flame-retardant corrosion-resistant powder coating for batteries according to any one of claims 1 to 8, characterized by comprising the steps of:
s1: heating bisphenol A epoxy resin and phenolic aldehyde modified epoxy resin to melt, and stirring to obtain a melt;
s2: adding an insulating filler into the melt in the step S1, and sequentially stirring, vacuum pressurizing, discharging, cooling and melt extruding to obtain a pre-dispersion;
s3: adding a curing agent, a curing accelerator, a brightening agent, a leveling agent, a defoaming agent, benzoin and a flame retardant into the pre-dispersion in the step S2, and stirring to obtain a mixture;
s4: and (3) sequentially carrying out melt extrusion, tabletting crushing, grinding and sieving on the mixture in the step (S3) to obtain the insulating flame-retardant corrosion-resistant powder coating for the battery.
10. Use of the insulating flame-retardant corrosion-resistant powder coating for batteries according to any one of claims 1 to 8 in battery housings, copper bars and insulation layers for the outer surfaces of motor rotors.
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