KR102048945B1 - Coating composition of pre-coated metal for battery cell cover of electric vehicle and pre-coated metal sheet using the same - Google Patents
Coating composition of pre-coated metal for battery cell cover of electric vehicle and pre-coated metal sheet using the same Download PDFInfo
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- KR102048945B1 KR102048945B1 KR1020180001133A KR20180001133A KR102048945B1 KR 102048945 B1 KR102048945 B1 KR 102048945B1 KR 1020180001133 A KR1020180001133 A KR 1020180001133A KR 20180001133 A KR20180001133 A KR 20180001133A KR 102048945 B1 KR102048945 B1 KR 102048945B1
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- weight
- coating composition
- battery cell
- electric vehicle
- steel sheet
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- 239000008199 coating composition Substances 0.000 title claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 title description 3
- 239000002184 metal Substances 0.000 title description 3
- 238000000576 coating method Methods 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000003822 epoxy resin Substances 0.000 claims abstract description 26
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000000049 pigment Substances 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 8
- 230000009477 glass transition Effects 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims abstract description 6
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000000178 monomer Substances 0.000 claims description 10
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 125000003700 epoxy group Chemical group 0.000 claims description 2
- 150000002118 epoxides Chemical class 0.000 claims 1
- 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 description 22
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 20
- 229940106691 bisphenol a Drugs 0.000 description 11
- 239000003973 paint Substances 0.000 description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 3
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 glycol ester Chemical class 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 description 1
- SBASXUCJHJRPEV-UHFFFAOYSA-N 2-(2-methoxyethoxy)ethanol Chemical compound COCCOCCO SBASXUCJHJRPEV-UHFFFAOYSA-N 0.000 description 1
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 description 1
- QMYGFTJCQFEDST-UHFFFAOYSA-N 3-methoxybutyl acetate Chemical compound COC(C)CCOC(C)=O QMYGFTJCQFEDST-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 239000005456 alcohol based solvent Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000003254 anti-foaming effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 1
- NGDPCAMPVQYGCW-UHFFFAOYSA-N dibenzothiophene 5-oxide Chemical compound C1=CC=C2S(=O)C3=CC=CC=C3C2=C1 NGDPCAMPVQYGCW-UHFFFAOYSA-N 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 239000003759 ester based solvent Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- QTEDUQSFCPUIOH-UEUBVZDRSA-N mastoparan-D Chemical compound CC[C@H](C)[C@H](N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](C)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C)C(=O)N[C@@H](C)C(=O)N[C@H](C(=O)N[C@@H](C)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CC(C)C)C(N)=O)CC1=CC=CC=C1 QTEDUQSFCPUIOH-UEUBVZDRSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- ULWHHBHJGPPBCO-UHFFFAOYSA-N propane-1,1-diol Chemical compound CCC(O)O ULWHHBHJGPPBCO-UHFFFAOYSA-N 0.000 description 1
- RLUCXJBHKHIDSP-UHFFFAOYSA-N propane-1,2-diol;propanoic acid Chemical compound CCC(O)=O.CC(O)CO RLUCXJBHKHIDSP-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/47—Levelling agents
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- H01M2/0262—
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- H01M2/0292—
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- H01M2/1094—
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- 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)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Aviation & Aerospace Engineering (AREA)
- Paints Or Removers (AREA)
Abstract
본 발명은 전기차 배터리 셀 커버용 피씨엠 도료 조성물 및 이에 의해 제조된 피씨엠 도장강판에 관한 것으로서, 전기차에 장착되는 배터리 셀을 커버하는 도장강판에 적합한 피씨엠 도료 조성물을 제공하는 데 그 목적이 있다.
이를 위하여 본 발명은, 전기차 배터리 셀 커버용 도장강판을 제조하기 위한 피씨엠 도료 조성물에 있어서, 상기 피씨엠 도료 조성물은, 전체 조성물을 기준으로, 중량평균분자량 8,000 ~ 11,000 , 산값 2 이하, 유리전이온도 40 ~ 50℃인 에폭시 수지가 70 ∼ 80 중량%, 수지성분과 도막을 형성하기 위한 가교제가 5 ~ 20 중량%, 용제가 10 ~ 20 중량%, 레벨링제가 0.5 ~ 1.0 중량%, 소포제가 0.1 ~ 0.5 중량%, 안료가 0.5 ~ 1.0 중량% 함유되는 것을 특징으로 한다.The present invention relates to a PMC coating composition for an electric vehicle battery cell cover and a PCM coated steel sheet manufactured by the same, and an object thereof is to provide a PPM coating composition suitable for a coated steel sheet covering a battery cell mounted on an electric vehicle. .
To this end, the present invention, in the PMC coating composition for manufacturing a coated steel sheet for an electric vehicle battery cell cover, the PMC coating composition, based on the total composition, the weight average molecular weight 8,000 ~ 11,000, acid value 2 or less, glass transition 70 to 80% by weight of an epoxy resin having a temperature of 40 to 50 ° C, 5 to 20% by weight of a crosslinking agent for forming a resin component and a coating film, 10 to 20% by weight of a solvent, 0.5 to 1.0% by weight of a leveling agent, and 0.1 of an antifoaming agent. ~ 0.5% by weight, characterized in that the pigment is contained 0.5 to 1.0% by weight.
Description
본 발명은 전기차 배터리 셀 커버용 피씨엠 도료 조성물 및 이에 의해 제조된 피씨엠 도장강판에 관한 것으로서, 더욱 상세하게는, 전기자동차에 장착되는 배터리 셀을 커버하기 위한 알루미늄 판재에 피씨엠 도료 조성물을 도포하여, 내전압 특성 및 열전도도를 향상시킴과 동시에 우수한 물리적 기능을 갖도록 한 피씨엠 도료 조성물 및 이에 의해 제조된 피씨엠 도장강판에 관한 것이다.The present invention relates to a PMC coating composition for an electric vehicle battery cell cover and a PCM coated steel sheet manufactured thereby, and more particularly, to apply a PCM coating composition to an aluminum plate for covering a battery cell mounted on an electric vehicle. Accordingly, the present invention relates to a PCM coating composition and a PCM coated steel sheet manufactured thereby to improve the breakdown voltage characteristics and thermal conductivity and to have an excellent physical function.
강판 도장 방식에는, 강판을 성형 가공한 후에 도장하는 포스트 코팅(Post-Coating) 방식과, 강판을 성형 가공하기 전에 도장하는 프리 코팅(Pre-Coating) 방식이 있다.The steel plate coating method includes a post-coating method for coating a steel sheet after molding and a pre-coating method for coating the steel sheet before molding.
상기 포스트 코팅 방식은, 설비비가 저렴하고 소량 생산에 유리하지만 균일한 제품의 생산 및 대량 생산이 어렵다는 단점이 있다.The post coating method is disadvantageous in that equipment costs are low and advantageous for small quantity production, but production of uniform products and mass production are difficult.
상기 프리 코팅 방식은, 균일한 제품을 생산할 수 있고 도료의 손실이 적으며 단시간 내에 대량 생산이 가능하다는 장점이 있다.The pre-coating method has the advantage of being able to produce a uniform product, less loss of paint and mass production in a short time.
상기한 프리 코팅 방식으로 도장한 강판을 통상 피씨엠(Pre-Coated Metal) 강판이라 하고, 프리 코팅에 사용되는 도료를 피씨엠 도료라 부르고 있다.The steel sheet coated by the pre-coating method is commonly referred to as a pre-coated metal steel sheet, and the paint used for the pre-coating is called a PM coating.
현재의 피씨엠 도료는 대부분 하도와 상도의 2 코트 시스템(Coat System)을 채택하고 있으며, 일반적으로 도막두께 20 ~ 30㎛의 솔리드(Solid) 색상을 구현하고 있다. The current PCM paints mostly adopt two coat systems of top and bottom coats, and generally realize solid colors with a film thickness of 20 to 30 μm.
상기한 2 코트 시스템은, 도막의 가공성과 외관 등의 물성을 고려한 것으로서, 현재까지 소비자의 요구에 부응할 수 있는 물성을 구현할 수 있는 최적의 피씨엠 도장방식으로 알려져 있다.The two-coat system is considered to be an optimum PCM coating method capable of realizing physical properties that can meet the needs of consumers, taking into consideration the physical properties such as processability and appearance of the coating film.
한편, 전기차에 장착되는 배터리 셀(Battery Cell)을 커버하기 위한 강판은, 일반 건자재용 피씨엠 강판과 달리, 고전압에 대한 내전압성, 양호한 열전도도 및 마찰계수가 요구되고 있다. On the other hand, the steel sheet for covering the battery cell (battery cell) mounted on the electric vehicle, unlike the general steel sheet PC steel sheet, high voltage resistance, good thermal conductivity and coefficient of friction for high voltage is required.
그런데 종래의 피씨엠 도료 조성물은, 내전압성과 같은 전기적 특성, 양호한 전기전도도 및 마찰계수를 충족할수 없다는 문제가 있다.However, the conventional PCM coating composition has a problem in that it cannot satisfy electrical characteristics such as voltage resistance, good electrical conductivity and coefficient of friction.
이에 따라 종래의 피씨엠 도료 조성물로는, 전기차에 장착되는 배터리 셀을 커버하는 강판에 적용하기가 부적합하다는 문제점이 지적되고 있다. Accordingly, it is pointed out that the conventional PCM coating composition is not suitable to be applied to a steel plate covering a battery cell mounted on an electric vehicle.
본 발명은 상기한 종래기술의 문제점을 해결하기 위한 것으로서, 전기차에 장착되는 배터리 셀을 커버하는 강판에 적합한 피씨엠 도료 조성물을 제공하는 데 그 목적이 있다.The present invention is to solve the above problems of the prior art, an object of the present invention to provide a PCM coating composition suitable for a steel plate covering a battery cell mounted on an electric vehicle.
본 발명의 다른 목적은, 외관, 가공성 및 부착성이 우수한 배터리 셀 커버용 피씨엠 도료 조성물을 제공하는 데 있다.Another object of the present invention is to provide a PCM coating composition for a battery cell cover excellent in appearance, processability and adhesion.
본 발명의 또 다른 목적은, 배터리 셀 커버용 피씨엠 도장강판이 우수한 내전압성, 양호한 전기 전도도 및 마찰계수를 갖도록 하는 데 있다.It is still another object of the present invention to make the PCM coated steel sheet for battery cell cover have excellent withstand voltage resistance, good electrical conductivity and coefficient of friction.
상기한 목적을 달성하기 위하여 본 발명은, 전기차 배터리 셀 커버용 도장강판을 제조하기 위한 피씨엠 도료 조성물에 있어서, 상기 피씨엠 도료 조성물은, 전체 조성물을 기준으로, 중량평균분자량 8,000 ~ 11,000 , 산값 2 이하, 유리전이온도 40 ~ 50℃인 에폭시 수지가 70 ∼ 80 중량%, 수지성분과 도막을 형성하기 위한 가교제가 5 ~ 20 중량%, 용제가 10 ~ 20 중량%, 레벨링제가 0.5 ~ 1.0 중량%, 소포제가 0.1 ~ 0.5 중량%, 안료가 0.5 ~ 1.0 중량% 함유되는 것을 특징으로 한다.In order to achieve the above object, the present invention, in the PMC coating composition for producing a coated steel sheet for an electric vehicle battery cell cover, the PCM coating composition, based on the total composition, the weight average molecular weight 8,000 ~ 11,000, acid value 70 to 80% by weight of an epoxy resin having a glass transition temperature of 40 to 50 ° C, 5 to 20% by weight of a crosslinking agent, 10 to 20% by weight of a solvent, and 0.5 to 1.0% of a leveling agent to form a resin component and a coating film. %, Antifoaming agent is characterized by containing 0.1 to 0.5% by weight, pigment 0.5 to 1.0% by weight.
또한 상기 에폭시 수지 분자구조 내에 BPA 및 ECH 모노머가 각각 25 ~ 35 중량% 함유되는 것을 특징으로 한다.In addition, the BPA and ECH monomers are contained in the epoxy resin molecule structure, respectively, characterized in that 25 to 35% by weight.
또한 상기 가교제는, 우레아 수지를 단독으로 사용하여 에폭시 수지를 삼차원물질로 경화시키는 것을 특징으로 한다. In addition, the crosslinking agent is characterized in that the epoxy resin is cured into a three-dimensional material by using a urea resin alone.
본 발명에 의하면, 전기차에 장착되는 배터리 셀을 커버하기 위한 강판의 제조에 적합한 피씨엠 도료 조성물을 제공할 수 있는 효과가 있다.According to the present invention, there is an effect that can provide a PCM coating composition suitable for the production of a steel sheet for covering a battery cell mounted on an electric vehicle.
또한 우수한 내전압성, 양호한 전기전도도 및 마찰계수를 갖는 동시에, 외관, 가공성 및 부착성이 우수한 전기차 배터리 셀 커버용 피씨엠 도장강판을 제조할 수 있는 효과가 있다. In addition, there is an effect capable of manufacturing a PCM coated steel sheet for an electric vehicle battery cell cover having excellent voltage resistance, good electrical conductivity and coefficient of friction, and excellent in appearance, processability and adhesion.
도 1은 본 발명에 따라 제조된 피씨엠 도장강판의 개략적인 단면도.1 is a schematic cross-sectional view of a PCM coated steel sheet manufactured according to the present invention.
이하 본 발명의 바람직한 실시예를 첨부된 도면을 참고로 하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명에 따른 전기차 배터리 셀 커버용 피씨엠 도장강판을 제조하기 위한 피씨엠 도료 조성물은, 전체 조성물을 기준으로, 중량평균분자량 8,000 ~ 11,000 , 산값 2 이하, 유리전이온도 40 ~ 50℃인 에폭시수지가, 70 ∼ 80 중량%, 수지성분과 도막을 형성하기 위한 가교제가 5 ~ 20 중량%, 용제가 10 ~ 20 중량%, 레벨링제가 0.5 ~ 1.0 중량%, 소포제가 0.1 ~ 0.5 중량%, 안료가 0.5 ~ 1.0 중량% 함유된다.PCM coating composition for manufacturing a PCM coated steel sheet for an electric vehicle battery cell cover according to the present invention, based on the total composition, the weight average molecular weight of 8,000 ~ 11,000, acid value 2 or less, epoxy resin having a glass transition temperature of 40 ~ 50 ℃ A, 70 to 80% by weight, 5 to 20% by weight of the crosslinking agent for forming the resin component and the coating film, 10 to 20% by weight of the solvent, 0.5 to 1.0% by weight of the leveling agent, 0.1 to 0.5% by weight of the antifoaming agent, and the pigment 0.5 to 1.0% by weight.
또한 에폭시수지 분자구조 내에 BPA 및 ECH 모노머가 각각 25 ~ 35 중량% 함유된다.In addition, 25 to 35% by weight of BPA and ECH monomers are contained in the epoxy resin molecular structure, respectively.
본 발명자는 우수한 내전압성, 전기전도도 및 마찰계수를 갖는 동시에, 외관, 가공성, 부착성을 만족시킬 수 있는 전기 자동차 배터리 셀 커버용 피씨엠 도료 조성물을 개발하기 위하여 연구 노력한 결과, 반응성이 풍부한 삼원환의 에폭시기(Epoxide)를 1분자 중에 2개 이상 갖고 있는 BPA 및 ECH를 콜드 블렌딩(Cold Blending)한 수지를 적용할 경우, 위 조건을 만족시킬 수 있음을 발견하였다.MEANS TO SOLVE THE PROBLEM The present inventors have made an effort to develop a PMC coating composition for an electric vehicle battery cell cover that has excellent voltage resistance, electrical conductivity and coefficient of friction, and which can satisfy appearance, processability, and adhesion. It has been found that the above conditions can be satisfied by applying a resin that is cold blended with BPA and ECH having two or more epoxy groups in one molecule.
특히 에폭시 분자구조 내에 BPA 및 ECH의 모노머를 각각 25 ~ 35 중량% 함유시킬 경우, 배터리 셀 커버용 강판에 적합 피씨엠 도료를 제조할 수 있었다.In particular, when containing 25 to 35% by weight of monomers of BPA and ECH in the epoxy molecular structure, respectively, a suitable PCM coating could be prepared for the steel plate for battery cell cover.
본 발명에 따른 에폭시 수지는, 전기적 특성, 내열성, 내수성, 내약품성이 우수하고, 기계적 강도가 크며 치수안정성이 우수한 특징이 있다. The epoxy resin according to the present invention is excellent in electrical properties, heat resistance, water resistance, chemical resistance, large mechanical strength and excellent dimensional stability.
또한 본 발명에 따른 피씨엠 도료 조성물은, 일반 피씨엠 도료와 달리, 우수한 내전압성, 양호한 전기전도도를 갖는다. In addition, the PMM coating composition according to the present invention has excellent voltage resistance and good electrical conductivity, unlike ordinary PMM paint.
이하 본 발명에 따른 피씨엠 도료 조성물의 각 성분에 대하여 설명한다.Hereinafter, each component of the PCM coating composition according to the present invention will be described.
<에폭시 수지><Epoxy resin>
본 발명에 사용되는 에폭시 수지는, 중량평균분자량 8,000 ∼ 11,000, 산값 2 mgKOH/g 이하, 유리전이온도(Tg) 40 ∼ 50℃인 것을 사용하는 것이 바람직하다. It is preferable to use the epoxy resin used for this invention whose weight average molecular weights are 8,000-11,000, an acid value of 2 mgKOH / g or less, and a glass transition temperature (Tg) of 40-50 degreeC.
여기서 상기 중량평균분자량이 11,000을 초과하게 되면 내구성이 저하되고, 8000 미만이 되면 도막의 가공성이 불량해진다.If the weight average molecular weight exceeds 11,000, durability decreases, and if the weight average molecular weight is less than 8000, the workability of the coating film becomes poor.
또한 에폭시 수지의 유리전이온도가 40℃ 이하가 되면 부착력 및 경도가 저하되고, 50℃ 이상이 되면 도막이 경화되어 가공성이 나빠진다. Moreover, when glass transition temperature of an epoxy resin becomes 40 degrees C or less, adhesive force and hardness will fall, and when it becomes 50 degrees C or more, a coating film will harden and workability will worsen.
또한 도막의 가공성을 유지하기 위해, 에폭시 분자구조 내에 BPA 및 ECH 모노머를 각각 25 ~ 35 중량% 함유시키는 것이 바람직하다. Moreover, in order to maintain the processability of a coating film, it is preferable to contain 25-35 weight% of BPA and ECH monomers in an epoxy molecular structure, respectively.
상기 BPA(Bisphenol-A)는 페놀과 아세톤을 촉매를 통해 축합 반응시켜 얻는 백색의 결정체로, 한 분자의 말단에 반응성이 우수한 두개의 하이드록실 그룹(Hydroxyl Group)을 가지고 있다.The BPA (Bisphenol-A) is a white crystal obtained by condensation reaction between phenol and acetone through a catalyst, and has two hydroxyl groups (Hydroxyl Group) having excellent reactivity at the end of one molecule.
또한 상기 ECH는, 에폭시 수지 생산에 필요한 출발 물질로서 반응기인 에폭시 링(Ring)을 가지고 있다.In addition, the ECH has an epoxy ring, which is a reactor, as a starting material required for producing an epoxy resin.
여기서 상기 BPA와 ECH는, 콜드 블렌딩(Cold Blending)하여 사용하는 것이 바람직하다.Here, the BPA and the ECH are preferably used by cold blending.
상기 콜드 블렌딩에 의하면, 연질의 기능을 가진 수지가 경질의 기능도 가지게 되고, 혼합비율을 적절히 조절하면 다기능의 특성을 갖도록 할 수 있다.According to the cold blending, the resin having a soft function also has a hard function, and if the mixing ratio is appropriately adjusted, the resin can have a multifunctional characteristic.
한편, 상기 BPA 모노머의 함량이 35 중량%를 초과하면 표면경도가 저하되고, 25 중량% 미만이 되면 도막의 가공성을 확보하기가 어렵게 된다.On the other hand, when the content of the BPA monomer exceeds 35% by weight, the surface hardness is lowered, if less than 25% by weight it is difficult to secure the processability of the coating film.
또한 상기 ECH 모노머의 함량이 35 중량%를 초과하면 가공성이 저하되고, 25 중량% 미만이 되면 도막의 표면경도가 저하된다.In addition, when the content of the ECH monomer exceeds 35% by weight, the workability is lowered. When the content of the ECH monomer is less than 25% by weight, the surface hardness of the coating film is lowered.
따라서 상기 BPA 및 ECH의 함량은 에폭시 수지에 대해 각각 25 ~ 35 중량%로 함유시키는 것이 바람직하다. Therefore, the content of BPA and ECH is preferably contained in 25 to 35% by weight relative to the epoxy resin.
아래의 [표 1]은 본 발명에 따른 에폭시 수지의 실시예를 나타낸 것이고, [표 2]는 기존의 상도형 수지와 본 발명에 따른 에폭시 수지의 비교예를 나타낸 것이다.Table 1 below shows examples of epoxy resins according to the present invention, and Table 2 shows comparative examples of existing top coat type resins and epoxy resins according to the present invention.
1Example
One
2Example
2
(당량비,%)Alcohol
(Equivalent ratio,%)
(당량비,%)mountain
(Equivalent ratio,%)
IPA:이소프탈산, TPA:테레프탈산, AA:아디핀산
점도:50% 용액(25℃ 가드너)
분자량: 중량평균분자량(GPC)NPG: neopentyl glycol, EG: ethylene glycol, 1,6HD: 1,6 hexanediol, PD: propanediol
IPA: isophthalic acid, TPA: terephthalic acid, AA: adipic acid
Viscosity: 50% solution (25 ° C Gardner)
Molecular weight: weight average molecular weight (GPC)
위 [표 2]에서 알 수 있듯이, 본 발명에 따른 에폭시 수지는, 기존의 상도형 수지와 비교할 때, 고형분이 낮고, 분자량 및 유리전이온도(Tg)는 높은 특징을 갖는다. As can be seen from the above [Table 2], the epoxy resin according to the present invention has a low solids content, high molecular weight and glass transition temperature (Tg) as compared with conventional top coat type resins.
<가교제> <Bridge school>
본 발명에서는 상기한 수지성분과 도막을 형성하기 위한 가교제로서, 우레아 수지를 단독으로 적용하여 에폭시 수지를 삼차원의 물질로 경화시켰다. In the present invention, as the crosslinking agent for forming the resin component and the coating film, the urea resin is applied alone to cure the epoxy resin into a three-dimensional material.
기존의 피씨엠 도료에서, 가교제로서 멜라민 수지를 단독으로 적용할 경우, 도막 강도는 우수하나, 도막의 가공성 및 부착성 등이 상대적으로 취약해진다.In the conventional PCM paint, when the melamine resin is applied alone as a crosslinking agent, the coating film strength is excellent, but the workability and adhesion of the coating film are relatively weak.
반면에 우레아 수지를 단독으로 적용할 경우, 가공성 및 부착성은 우수하나 상대적으로 도막 경도가 저하되는 경향이 있다.On the other hand, when the urea resin is applied alone, the workability and adhesion are excellent, but the coating film hardness tends to decrease.
본 발명은 이러한 단점을 해결하기 위해, 에폭시 수지내의 모노머 비율을 조절하여 에폭시 수지를 삼차원의 물질로 경화시켰다.In order to solve this disadvantage, the present invention controls the monomer ratio in the epoxy resin to cure the epoxy resin into a three-dimensional material.
이에 따라 내전압성 등의 전기적 특성 및 마찰계수를 향상시킬 수 있었다. Accordingly, the electrical characteristics such as the voltage resistance and the friction coefficient could be improved.
<용제><Solvent>
본 발명의 도료 조성물은, 취급, 피복 작업 시의 특성 등을 고려하여 적당량의 유기 용제를 함유한다. The coating composition of the present invention contains an appropriate amount of an organic solvent in consideration of characteristics in handling, coating and the like.
상기 유기용제로는, 방향족 탄화수소계, 글리콜 에스테르계, 글리콜 에테르계, 알코올계 용제 등을 적절히 혼합하여 사용하는 것이 바람직하다. As said organic solvent, it is preferable to mix and use aromatic hydrocarbon type, glycol ester type, glycol ether type, alcohol solvent, etc. suitably.
상기 방향족 탄화수소계 용제로는, SK사의 코코졸 #100, 코코졸 #150 등이 있다.Examples of the aromatic hydrocarbon solvents include Cosol sol # 100, Cosol sol # 150, and the like.
상기 글리콜 에스테르계 용제로는, 유니온 카바이드사의 에틸 아세테이트, n-부틸 아세테이트, 셀로솔브 아세테이트, 프로필렌 글리콜 모노메틸 아세테이트, 3-메톡시 부틸 아세테이트 등을 예로 들 수 있다. Examples of the glycol ester solvents include ethyl acetate, n-butyl acetate, cellosolve acetate, propylene glycol monomethyl acetate, 3-methoxy butyl acetate, and the like.
글리콜 에테르계 용제로는, 유니온 카바이드 사의 메틸 셀로솔브, 에틸 셀로솔브, 에틸렌 글리콜 부틸 에테르, 디에틸렌 글리콜 메틸 에테르, 디에틸렌 글리콜 에틸에테르, 디에틸렌 글리콜부틸 에테르 등이 있다.Examples of the glycol ether solvent include methyl cellosolve, ethyl cellosolve, ethylene glycol butyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, diethylene glycol butyl ether, etc. of Union Carbide.
상기 알코올계 용제로는, 에탄올, 이소프로판올, n-부탄올, 아밀알콜, 사이클로 헥산올 등을 예로 들 수 있다. Examples of the alcohol solvents include ethanol, isopropanol, n-butanol, amyl alcohol, cyclohexanol and the like.
상기한 용제는, 전체 도료 조성물에 대하여 30 ∼ 50 중량% 범위로 함유시키는 것이 바람직하다. It is preferable to contain the said solvent in 30 to 50weight% of the range with respect to all the coating compositions.
<첨가제(레벨링제, 소포제 및 안료)> <Additives (leveling agents, defoamers and pigments)>
본 발명에서는 도막 평활성을 유지하고 도장 작업시 소포성 향상을 위하여, 아크릴계나 폴리머계 또는 폴리에틸계 레벨링제와 소포제를 각각 0.5 ∼ 1.0 중량%함유시킨다. In the present invention, in order to maintain the coating film smoothness and to improve the antifoaming property during painting, the acrylic, polymer or polyethylen leveling agent and the antifoaming agent are each contained 0.5 to 1.0% by weight.
이러한 레벨링제와 소포제로는, 구수모토 케미칼사의 디스파론 L-1980, 디스파론 L-1984, 디스파론 AP-30, BYK사의 BYK356, BYK410 등을 예로 들 수 있다. Examples of such leveling agents and antifoaming agents include Disparon L-1980, Disparon L-1984, Disparon AP-30, BYK356 by BYK, BYK410 and the like by Kusumoto Chemical.
또한 본 발명의 도료 조성물은, 안료를 함유하지 않는 투명 도료 조성물로 사용되는 것이 바람직하나, 착색 안료를 함유하여 도료 조성물로 사용할 수도 있다.Moreover, although the coating composition of this invention is used preferably with the transparent coating composition which does not contain a pigment, it can also be used as a coating composition containing a coloring pigment.
상기 착색 안료로는, 피복 조성물 분야에서 사용 가능한 티타늄 옥사이드 등을 함유시키거나, 카본블랙 등이 첨가될 수 있다. The colored pigment may contain titanium oxide or the like usable in the field of coating compositions, or carbon black may be added.
그 외에 본 발명의 도료 조성물은, 활석, 점토, 실리카, 운모, 알루미나 등과 같은 체질안료, 충진제 등을 포함할 수 있다.In addition, the coating composition of the present invention may include a sieving pigment such as talc, clay, silica, mica, alumina, filler, and the like.
위 수지를 도료화하여 도료선정 시험을 수행하였으며, 아래의 [표 3]은 그 내용을 나타낸 것이다. Paint the resin to perform a paint selection test, the following Table 3 shows the contents.
또한 0.3T의 AL 판재를 메틸에틸케톤으로 탈지하고, 실시예 1 ∼ 4의 도료를 건조 도막두께가 8㎛가 되도록 바 코팅한 뒤, 300℃의 분위기 온도에서 15초간 소부하여 물성 시험시편을 제조한 후, 물성을 평가하였다.Further, 0.3T AL plate was degreased with methyl ethyl ketone, and the coatings of Examples 1 to 4 were bar-coated to have a dry coating thickness of 8 µm. After that, the physical properties were evaluated.
아래의 [표 4]는 그 평가결과를 나타낸 것이다.Table 4 below shows the evaluation results.
[표 4]에서 ◎는 아주 양호, ○는 양호, △는 보통, ×는 불량을 나타낸 것이다.In Table 4, ◎ is very good, ○ is good, △ is normal, and × is poor.
평가결과 에폭시 수지가 70 중량% 함유된 실시예의 2가, 가공성, 부착성, Pick Up성, 외관 평활성 모두에서 아주 양호한 결과를 나타내었다.The evaluation results showed very good results in all of the divalent, workability, adhesion, pick up properties, and appearance smoothness of the example containing 70% by weight of epoxy resin.
이상에서는 본 발명의 바람직한 실시예를 예시적으로 설명한 것으로서 본 발명의 범위는 상기한 특정 실시예에 한정되지 아니한다. 해당 기술분야에서 통상의 지식을 가진 자라면 본 발명의 기술적 사상의 범위를 벗어남이 없이 다양한 변경 및 수정이 가능하다는 것을 이해할 수 있을 것이다. In the above description of the preferred embodiments of the present invention by way of example, the scope of the present invention is not limited to the above-described specific embodiments. Those skilled in the art will understand that various changes and modifications can be made without departing from the scope of the present invention.
10: 소지강판
20: 전처리층
30: 상부 도막층
40: 이면 도막층10: steel sheet
20: pretreatment layer
30: upper coating layer
40: back coating layer
Claims (4)
상기 피씨엠 도료 조성물은, 전체 조성물을 기준으로,
중량평균분자량 8,000 ~ 11,000, 산값 2 이하, 유리전이온도 40 ~ 50℃인 에폭시 수지가 70 ∼ 80 중량%,
수지성분과 도막을 형성하기 위한 가교제가 5 ~ 20 중량%,
용제가 10 ~ 20 중량%,
레벨링제가 0.5 ~ 1.0 중량%,
소포제가 0.1 ~ 0.5 중량%,
안료가 0.5 ~ 1.0 중량% 함유되고,
상기 에폭시 수지는, 분자구조 내에 BPA 모노머와 ECH 모노머가 각각 25 ~ 35 중량% 함유되고,
삼원환의 에폭시기(Epoxide)를 1분자 중에 2개 이상 갖고 있는 BPA 및 ECH 를 콜드 블렌딩(Cold Blending)하여 사용하며,
상기 가교제는, 우레아 수지를 단독으로 사용하여 에폭시 수지를 삼차원 물질로 경화시키는 것을 특징으로 하는 전기차 배터리 셀 커버용 도장강판을 제조하기 위한 피씨엠 도료 조성물.In the PMC coating composition for producing a painted steel sheet for an electric vehicle battery cell cover,
The PCM coating composition, based on the entire composition,
70 to 80% by weight of an epoxy resin having a weight average molecular weight of 8,000 to 11,000, an acid value of 2 or less, and a glass transition temperature of 40 to 50 ° C,
5 to 20% by weight of a crosslinking agent for forming a resin component and a coating film,
10-20 wt% of solvent,
Leveling agent is 0.5 to 1.0% by weight,
Antifoaming agent is 0.1-0.5% by weight,
Pigment is contained 0.5 to 1.0% by weight,
The epoxy resin is 25 to 35% by weight of each of the BPA monomer and ECH monomer in the molecular structure,
Cold blending is used for BPA and ECH having two or more three-membered epoxy groups (Epoxide) in one molecule.
The crosslinking agent is a PCM coating composition for manufacturing a coated steel sheet for an electric vehicle battery cell cover, characterized in that the urea resin alone to cure the epoxy resin to a three-dimensional material.
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