KR102795604B1 - Whinstone Pattern Coating Composition for Manufacturing Pre-Coated Metal Color Sheet and Color Sheet using the Same - Google Patents
Whinstone Pattern Coating Composition for Manufacturing Pre-Coated Metal Color Sheet and Color Sheet using the Same Download PDFInfo
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- KR102795604B1 KR102795604B1 KR1020230050035A KR20230050035A KR102795604B1 KR 102795604 B1 KR102795604 B1 KR 102795604B1 KR 1020230050035 A KR1020230050035 A KR 1020230050035A KR 20230050035 A KR20230050035 A KR 20230050035A KR 102795604 B1 KR102795604 B1 KR 102795604B1
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- color steel
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000008199 coating composition Substances 0.000 title claims description 6
- 229910052751 metal Inorganic materials 0.000 title description 2
- 239000002184 metal Substances 0.000 title description 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 75
- 239000010959 steel Substances 0.000 claims abstract description 75
- 239000003973 paint Substances 0.000 claims abstract description 45
- 229920001225 polyester resin Polymers 0.000 claims abstract description 34
- 239000004645 polyester resin Substances 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 31
- 239000000049 pigment Substances 0.000 claims abstract description 30
- 230000009477 glass transition Effects 0.000 claims abstract description 27
- 239000004952 Polyamide Substances 0.000 claims abstract description 23
- 229920002647 polyamide Polymers 0.000 claims abstract description 23
- 239000003960 organic solvent Substances 0.000 claims abstract description 18
- NHGMTYQLILICLU-UHFFFAOYSA-N 2-N-methoxy-2-N,4-N,1,2,3,4-hexamethyl-1,3,5-triazine-2,4,6-triamine Chemical compound CNC1(N(C(N(C(=N1)N)C)(N(OC)C)C)C)C NHGMTYQLILICLU-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 15
- CJMZLCRLBNZJQR-UHFFFAOYSA-N ethyl 2-amino-4-(4-fluorophenyl)thiophene-3-carboxylate Chemical compound CCOC(=O)C1=C(N)SC=C1C1=CC=C(F)C=C1 CJMZLCRLBNZJQR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002253 acid Substances 0.000 claims abstract description 12
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 12
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 10
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 10
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 92
- 238000000576 coating method Methods 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000007747 plating Methods 0.000 claims description 18
- 239000002518 antifoaming agent Substances 0.000 claims description 16
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 13
- 239000011247 coating layer Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- -1 zinc-aluminum-magnesium Chemical compound 0.000 claims description 6
- 239000001023 inorganic pigment Substances 0.000 claims description 5
- 150000002576 ketones Chemical class 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 239000006224 matting agent Substances 0.000 claims description 4
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 15
- 239000002904 solvent Substances 0.000 description 14
- 239000000654 additive Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000843 powder Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010422 painting Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 239000004971 Cross linker Substances 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 4
- 239000012860 organic pigment Substances 0.000 description 4
- 229920000877 Melamine resin Polymers 0.000 description 3
- 239000002318 adhesion promoter Substances 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- SLLUHROOFRDQLU-UHFFFAOYSA-N 2-n-butoxy-1,3,5-triazine-2,4,6-triamine Chemical compound CCCCONC1=NC(N)=NC(N)=N1 SLLUHROOFRDQLU-UHFFFAOYSA-N 0.000 description 1
- BLRJSXFWDNMKQT-UHFFFAOYSA-N 2-n-methoxy-1,3,5-triazine-2,4,6-triamine Chemical compound CONC1=NC(N)=NC(N)=N1 BLRJSXFWDNMKQT-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000009500 colour coating Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000047 product 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/51—One specific pretreatment, e.g. phosphatation, chromatation, in combination with one specific coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
-
- 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
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- 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
- C08K3/34—Silicon-containing compounds
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
- C08K5/34922—Melamine; Derivatives thereof
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/41—Compounds containing sulfur bound to oxygen
- C08K5/42—Sulfonic acids; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L91/06—Waxes
-
- 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
- C09D5/002—Priming 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2350/00—Pretreatment of the substrate
- B05D2350/10—Phosphatation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2350/00—Pretreatment of the substrate
- B05D2350/20—Chromatation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2350/00—Pretreatment of the substrate
- B05D2350/60—Adding a layer before coating
- B05D2350/65—Adding a layer before coating metal layer
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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
현무암무늬 컬러강판 제조용 도료 조성물 및 이에 의해 제조된 컬러강판이 제공된다.
본 발명의 컬러강판 제조용 도료 조성물은, 중량%로, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 20~30℃, OH기가 60~70mgKOH/g, 산가가 6~10 mgKOH/g인 변성 폴리에스테르 수지: 30~40%, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 -40~-50℃인 SOFT 폴리에스테르 수지: 10~20%, 헥사메틸메톡시멜라민 가교제:5~10%, 디노닐나프탈렌술폰산 경화촉진제: 0.5~1.5%, 안료: 0.5~5%, 탄화수소계 유기용제: 35∼50%, 폴리아마이드 왁스: 0.01% 이상 0.1% 미만 및 실리콘 free 소포제: 0.5~1.0%를 포함한다. A paint composition for manufacturing a basalt-patterned color steel plate and a color steel plate manufactured thereby are provided.
The paint composition for manufacturing a color steel plate of the present invention comprises, in wt%, 30 to 40% of a modified polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000, a glass transition temperature (Tg) of 20 to 30°C, an OH group of 60 to 70 mgKOH/g, and an acid value of 6 to 10 mgKOH/g, 10 to 20% of a SOFT polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of -40 to -50°C, 5 to 10% of a hexamethylmethoxymelamine crosslinking agent, 0.5 to 1.5% of a dinonylnaphthalenesulfonic acid curing accelerator, 0.5 to 5% of a pigment, 35 to 50% of a hydrocarbon-based organic solvent, and 0.01% or more of a polyamide wax. Less than 0.1% and silicone free defoamers: Contains 0.5 to 1.0%.
Description
본 발명은 현무암무늬 피씨엠 컬러강판 제조용 피씨엠 도료 조성물 및 이에 의해 제조된 현무암 컬러강판에 관한 것으로서, 보다 상세하게는, 하도 특성을 지닌 베이스도료를 사용하고, 현무암무늬를 가진 상도를 도장하여 기존에 매트형이나 윙클도료와 다른 고경도 고가공 현무암무늬 도료 조성물 및 이에 의해 제조된 현무암무늬 컬러강판에 관한 것이다.The present invention relates to a PCM paint composition for manufacturing a basalt-patterned PCM color steel plate, and to a basalt-patterned color steel plate manufactured thereby. More specifically, the present invention relates to a high-hardness, high-processing basalt-patterned paint composition that is different from existing matte or winkle paints by using a base paint having undercoat properties and applying a top coat having a basalt pattern, and to a basalt-patterned color steel plate manufactured thereby.
철판에 도료를 도장하는 방식은 도장 후 가공하는 방식과 가공 후 도장하는 방식으로 대별된다. 상기 도장 후 가공한 강판을 피씨엠(Pre-Coated Metal)강판 또는 컬러강판이라 하는데, 여기에 사용되는 도료를 피씨엠 도료라 부르고 있다. 이러한 피씨엠 도료에 의해 도장된 피씨엠 강판은 도장 후에 별도의 가공 과정을 거치므로, 피씨엠 도료는 우수한 가공성과 밀착성을 가질 것이 요구되며, 용도에 따라 도막경도, 내후성, 내식성 등의 조건을 만족할 필요가 있다. The method of applying paint to steel plates is largely divided into the method of processing after painting and the method of processing after painting. The steel plates processed after painting are called PCM (Pre-Coated Metal) steel plates or color steel plates, and the paint used therein is called PCM paint. Since the PCM steel plates painted with such PCM paint undergo a separate processing process after painting, the PCM paint is required to have excellent processability and adhesion, and depending on the intended use, it is necessary to satisfy conditions such as coating hardness, weather resistance, and corrosion resistance.
한편 상기 가공 후 도장하는 방식의 도료에는 선박용도료, 자동차용도료, 일반공업용도료(분체도료) 등을 들 수 있다. 그런데 이러한 기존의 가공 후 도장방식의 도료(공업용 액상, 분체도료)를 이용하여 함마톤이라는 이름으로 현무암 무늬도료를 도장하고 있었으나, PCM 방식으로는 그런 질감의 무늬를 제조하지 못하였다. 따라서 PCM에서도 함마톤무늬(현무암)의 칼라강판을 생산할 수 있는 기술개발에 대한 요구가 계속되어 오고 있는 실정이다. Meanwhile, examples of paints that are applied after processing include marine paints, automotive paints, and general industrial paints (powder paints). However, while these existing paints (industrial liquid, powder paints) that are applied after processing are applied with a basalt pattern called hammertone, such a texture pattern could not be produced using the PCM method. Therefore, there is a continuing demand for technology development that can produce hammertone patterned (basalt) colored steel plates using PCM.
따라서 본 발명은 현무암 무늬 PCM 강판의 제조기술에 관한 것으로서, 하도 특성을 가진 베이스도료와 왁스를 이용한 표면장력 제어로 현무암의 외관 및 질감을 형성할 수 있는 상도도료를 적용하여 기존 액상이나 분체 함마톤강판 대비 보다우수한 가공성 및 경도를 가지는 피씨엠 도료 조성물을 제공함에 그 목적이 있다.Accordingly, the present invention relates to a technology for manufacturing a basalt patterned PCM steel plate, and the purpose of the present invention is to provide a PCM paint composition having better processability and hardness than existing liquid or powder hammer-toned steel plates by applying a base paint having undercoat properties and a topcoat capable of forming the appearance and texture of basalt by controlling surface tension using wax.
또한 본 발명은 베이스 및 상도도료 조성물을 이용하여 제조된 현무암 무늬 컬러 강판을 제공함에 그 목적이 있다. In addition, the present invention aims to provide a basalt patterned color steel plate manufactured using a base and topcoat composition.
또한 본 발명에서 이루고자 하는 기술적 과제들은 이상에서 언급한 기술적 과제들에 한정되지 않으며, 언급하지 않은 또 다른 기술적 과제들은 아래의 기재로부터 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 명확하게 이해될 수 있을 것이다.In addition, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.
따라서 본 발명의 일 측면은, Therefore, one aspect of the present invention is,
중량%로, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 20~30℃, OH기가 60~70mgKOH/g, 산가가 6~10 mgKOH/g인 변성 폴리에스테르 수지: 30~40%, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 -40~-50℃인 SOFT 폴리에스테르 수지: 10~20%, 헥사메틸메톡시멜라민(HexaMethylMethoxyMelamine) 가교제:5~10%, 디노닐나프탈렌술폰산(DiNonylNaphthaleneSulfonicAcid) 경화촉진제: 0.5~1.5%, 안료:0.5~5%, 탄화수소계 유기용제: 35∼50%, 폴리아마이드 왁스: 0.01% 이상 0.1% 미만 및 실리콘 free 소포제: 0.5~1.0%를 포함하는 현무암무늬 컬러강판 제조용 피씨엠 상도 도료 조성물에 관한 것이다. In weight %, modified polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000, a glass transition temperature (Tg) of 20 to 30°C, an OH group of 60 to 70 mgKOH/g, and an acid value of 6 to 10 mgKOH/g: 30 to 40%, SOFT polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of -40 to -50°C: 10 to 20%, Hexamethylmethoxymelamine crosslinking agent: 5 to 10%, Dinonylnaphthalenesulfonic acid curing accelerator: 0.5 to 1.5%, pigment: 0.5 to 5%, hydrocarbon organic solvent: 35 to 50%, The present invention relates to a PCM coating composition for manufacturing a basalt patterned color steel plate, comprising polyamide wax in an amount of 0.01% or more and less than 0.1% and a silicone-free defoaming agent in an amount of 0.5 to 1.0%.
상기 폴리아마이드 왁스는 Melting Point 120~140℃, 평균입자 size 30~50㎛인 Powder형 왁스를 이용할 수 있다. The above polyamide wax can be used as a powder-type wax with a melting point of 120 to 140°C and an average particle size of 30 to 50 μm.
상기 탄화수소 유기용제에, 알콜계, Ester계, Ketone계 유기 용제를 단독 또는 혼합하여 사용함이 바람직하다. In the above hydrocarbon organic solvent, it is preferable to use alcohol-based, ester-based, or ketone-based organic solvents alone or in combination.
상기 안료로서 메탈릭, 마이카(펄) 또는 유무기안료를 사용할 수 있다. As the above pigment, metallic, mica (pearl) or organic/inorganic pigment can be used.
또한 본 발명은, In addition, the present invention,
소지강판;Steel plate;
상기 소지강판의 적어도 일면에 형성된 용융도금층;A molten galvanized layer formed on at least one surface of the above steel plate;
상기 용융도금층상에 형성된 하도 겸용 베이스층; 및 A base layer for use as a lower coating formed on the molten plating layer; and
상기 하도 겸용 베이스층 상에 형성된 상도도장층을 포함하고,Including a topcoat layer formed on the above-mentioned base layer,
상기 상도도장층은, 중량%로, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 20~30℃, OH기가 60~70mgKOH/g, 산가가 6~10 mgKOH/g인 변성 폴리에스테르 수지: 50~60%, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 -40~-50℃인 SOFT 폴리에스테르 수지: 20~30%, 헥사메틸메톡시멜라민(HexaMethylMethoxyMelamine) 가교제: 5~10%, 디노닐나프탈렌술폰산(DiNonylNaphthaleneSulfonicAcid) 경화촉진제: 0.5~1.5%, 안료: 0.5~5.0%, 폴리아마이드 왁스: 0.01% 이상 0.1% 미만 및 실리콘 free 소포제: 0.5~1.0%를 포함하는 현무암무늬 컬러강판에 관한 것이다. The above-mentioned coating layer comprises, in wt%, 50 to 60% of a modified polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000, a glass transition temperature (Tg) of 20 to 30°C, an OH group of 60 to 70 mgKOH/g, and an acid value of 6 to 10 mgKOH/g, 20 to 30% of a SOFT polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of -40 to -50°C, 5 to 10% of a Hexamethylmethoxymelamine crosslinker, 0.5 to 1.5% of a DiNonylNaphthaleneSulfonicAcid curing accelerator, 0.5 to 5.0% of a pigment, and 0.5 to 5.0% of a polyamide wax. It relates to a basalt-patterned color steel sheet containing 0.01% or more and less than 0.1% and a silicon-free defoaming agent: 0.5 to 1.0%.
상기 하도 겸용 베이스층은, 중량%로, 수평균 분자량(Mn)이 15,000~20,000이고 유리전이온도(Tg)가 5~10℃, OH기가 5~15mgKOH/g, 산가가 3mgKOH/g이하인 변성 폴리에스테르 수지: 60~70%, 헥사메틸메톡시멜라민(HexaMethylMethoxyMelamine) 가교제: 5~10%, 디노닐나프탈렌술폰산(DiNonylNaphthaleneSulfonicAcid) 경화촉진제: 0.5~1.5%, 백색 포함한 유색안료: 15~20%, 칼슘실리카계 방청안료:1~5%, 소포제,레벨링제,부착증진제 및 소광제: 각 0 ~ 2%를 포함하여 조성됨이 바람직하다. The above-mentioned dual-purpose base layer is preferably composed of, in wt%, a modified polyester resin having a number average molecular weight (Mn) of 15,000 to 20,000, a glass transition temperature (Tg) of 5 to 10°C, an OH group of 5 to 15 mgKOH/g, and an acid value of 3 mgKOH/g or less: 60 to 70%, a hexamethylmethoxymelamine crosslinking agent: 5 to 10%, a dinonylnaphthalenesulfonic acid curing accelerator: 0.5 to 1.5%, a colored pigment including white: 15 to 20%, a calcium silica-based rust-preventive pigment: 1 to 5%, and 0 to 2% each of an antifoaming agent, a leveling agent, an adhesion promoter, and a matting agent.
상기 용융도금층은 아연도금층, 알루미늄도금층, 아연-알루미늄 합금 도금층 및 또는 아연-알루미늄-마그네슘 합금 도금층 중 하나인 것이 바람직하다. It is preferable that the above-mentioned molten plating layer is one of a zinc plating layer, an aluminum plating layer, a zinc-aluminum alloy plating layer, and/or a zinc-aluminum-magnesium alloy plating layer.
상기 소지강판과 용융도금층 사이에 인산피막층, 크로메이트층 및 논(non)-크로메이트 화성피막층 중 하나로 이루어진 전처리층을 포함함이 바람직하다. It is preferable to include a pretreatment layer consisting of one of a phosphate film layer, a chromate layer, and a non-chromate chemical conversion film layer between the above-mentioned steel plate and the molten galvanized layer.
상기 하도 겸용 베이스층은 그 건조도막 두께가 10~20㎛일 수 있다.The above-mentioned combined base layer may have a dry film thickness of 10 to 20 μm.
상기 상도 도장층은 그 건조도막 두께가 10~30㎛일 수 있다.The above-mentioned coating layer may have a dry film thickness of 10 to 30 μm.
상기 상도 도장층상에 건조 도막두께가 5~20㎛인 클리어도장층을 형성할 수도 있다. A clear coating layer having a dry coating thickness of 5 to 20 ㎛ can also be formed on the above-mentioned coating layer.
상술한 구성의 본 발명에 따르면, 하도겸용 베이스층에 폴리아마이드 왁스를 포함한 도료를 코팅함으로써 표면장력이 제어된 상도도장층을 형성하여 현무암무늬의 외관 및 질감을 갖는 컬러강판의 제조에 유용한 효과가 있다. According to the present invention having the above-described configuration, by coating a paint including polyamide wax on a base layer for both lower and upper coatings, a top coating layer having controlled surface tension is formed, thereby having a useful effect in manufacturing a color steel plate having an appearance and texture of a basalt pattern.
또한 본 발명은 종래의 액상이나 분체 함마톤을 도장한 선가공 강판 대비 우세한 가공성을 확보할 수 있으며, 나아가. 경도, 내스크래치성 및 내식성 등이 우수한 도장층을 효과적으로 형성할 수 있다.In addition, the present invention can secure superior processability compared to conventional liquid or powder hammer-toned pre-processed steel plates, and furthermore, can effectively form a coating layer having excellent hardness, scratch resistance, and corrosion resistance.
아울러, 본 발명의 현무암무늬 컬러강판은 기존의 작은 윙클로 제조되는 매트(극무광)형이나, 아민과 여러 종류의 필러로 구현되는 윙클도료와 다른 윈스톤무늬를 효과적으로 구현할 수 있는 장점이 있다. In addition, the basalt patterned color steel plate of the present invention has an advantage in that it can effectively implement a Winston pattern, which is different from the matte (extremely matte) type manufactured with existing small winkles or the winkle paint implemented with amine and various types of fillers.
도 1은 본 발명의 실시예에 따른 컬러 강판의 단면을 모식적으로 나타낸 그림이다.
도 2는 종래 액상이나 분체 함마톤 도장강판에 대한 표면 사진이다.
도 3은 본 발명의 실시예에 따라 제조된 질감형 컬러강판에 대한 표면 사진이다. Figure 1 is a drawing schematically showing a cross-section of a color steel plate according to an embodiment of the present invention.
Figure 2 is a surface photograph of a conventional liquid or powder hammer-tone coated steel plate.
FIG. 3 is a surface photograph of a textured color steel plate manufactured according to an embodiment of the present invention.
이하, 본 발명을 설명한다.Hereinafter, the present invention will be described.
본 발명은 하도겸용 베이스도료에 폴리아마이드 왁스를 포함한 도료를 코팅함으로써 표면장력이 제어된 상도도장층을 형성하여 현무암무늬의 외관 및 질감을 갖는 컬러강판의 제조할 수 있으며, 나아가, 종래의 액상이나 분체 함마톤을 도장한 선가공 강판 대비 우세한 가공성을 확보할 수 있고, 경도, 내스크래치성, 내식성 등을 향상시킬 수 있는 컬러강판용 피시엠 상도 도료 조성물을 제공함을 특징으로 한다.The present invention is characterized in that it is possible to manufacture a color steel plate having the appearance and texture of a basalt pattern by forming a topcoat layer with controlled surface tension by coating a paint including polyamide wax on a base paint for both lower and upper coatings, and further provides a PCM topcoat composition for a color steel plate which can secure superior processability compared to a pre-processed steel plate coated with a conventional liquid or powder hammertone, and can improve hardness, scratch resistance, corrosion resistance, etc.
이러한 본 발명의 컬러강판용 피시엠 상도 도료 조성물은, 중량%로, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 20~30℃, OH기가 60~70mgKOH/g, 산가가 6~10 mgKOH/g인 변성 폴리에스테르 수지: 30~40%, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 -40~-50℃인 SOFT 폴리에스테르 수지: 10~20%, 헥사메틸메톡시멜라민(HexaMethylMethoxyMelamine) 가교제:5~10%, 디노닐나프탈렌술폰산(DiNonylNaphthaleneSulfonicAcid) 경화촉진제: 0.5~1.5%, 안료:0.5~5.0%, 탄화수소계 유기용제: 35∼50%, 폴리아마이드 왁스: 0.01% 이상 0.1% 미만 및 실리콘 free 소포제: 0.5~1.0%를 포함한다. The PCM topcoat composition for color steel plate of the present invention comprises, in wt%, 30 to 40% of a modified polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000, a glass transition temperature (Tg) of 20 to 30°C, an OH group of 60 to 70 mgKOH/g, and an acid value of 6 to 10 mgKOH/g, 10 to 20% of a SOFT polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of -40 to -50°C, 5 to 10% of a Hexamethylmethoxymelamine crosslinking agent, 0.5 to 1.5% of a DiNonylNaphthaleneSulfonicAcid curing accelerator, Pigment: 0.5 to 5.0%, hydrocarbon organic solvent: 35 to 50%, polyamide wax: 0.01% or more and less than 0.1%, and silicone-free defoaming agent: 0.5 to 1.0%.
이하, 본 발명에 따른 현무암 무늬형 컬러강판 제조용 피씨엠 상도 도료 조성물의 각 성분에 대하여 상세히 설명한다. 아래에서 "%"는 "중량%"를 의미한다. Hereinafter, each component of the PCM topcoat composition for manufacturing a basalt patterned color steel plate according to the present invention will be described in detail. Hereinafter, “%” means “weight%.”
[수지][profit]
본 발명에 따른 피씨엠 상도 도료 조성물은 변성 폴리에스테르 수지를 포함한다. 구체적으로, 상기 수지는 폴리에스테르 수지로서, 전체 도료 조성물에 대하여, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 20~30℃, OH기가 60~70mgKOH/g, 산가가 6~10 mgKOH/g인 변성 폴리에스테르 수지 30~40%와, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 -40~-50℃인 SOFT 폴리에스테르 수지 10~20%를 혼합하여 사용하는 것이 바람직하다. 만일 상기 SOFT 폴리에스테르 수지 함량이 20%를 초과할 경우 도막의 경도가 취약해지는 단점이 있고, 10% 미만이 되면 도막 유연성 및 가공성이 감소될 수 있다. 또한 주 수지의 수평균 분자량이 2,000 미만이 되면 가공성이 취약해지는 단점이 있고, 3,000을 초과할 경우 현무암 무늬가 불균일해 지는 경향이 있다. 본 발명에서 폴리에스테르 수지는 경도와 가공성의 발란스 등을 위하여 혼합 사용한다. The PCM coating composition according to the present invention includes a modified polyester resin. Specifically, the resin is a polyester resin, and it is preferable to use a mixture of 30 to 40% of a modified polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000, a glass transition temperature (Tg) of 20 to 30°C, an OH group of 60 to 70 mgKOH/g, and an acid value of 6 to 10 mgKOH/g and 10 to 20% of a SOFT polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of -40 to -50°C, based on the total coating composition. If the content of the SOFT polyester resin exceeds 20%, there is a disadvantage in that the hardness of the coating film becomes weak, and if it is less than 10%, the flexibility and processability of the coating film may decrease. In addition, if the number average molecular weight of the main resin is less than 2,000, there is a disadvantage in that the processability becomes poor, and if it exceeds 3,000, the basalt pattern tends to become uneven. In the present invention, the polyester resin is mixed and used to achieve a balance between hardness and processability.
[가교제][Bridge]
가교제는 상기 변성 폴리에스테르수지 성분과 함께 도막을 형성하는 것으로서, 멜라민수지를 사용할 수 있다. 본 발명의 가교제는 메틸메톡시기가 6개인 헥사메틸메톡시멜라민(HMMM:HexaMethylMethoxyMelamine) 수지를 5~10% 사용하는 것이 경화도, 가공성, 경도 측면에서 바람직하다.The crosslinking agent forms a film together with the modified polyester resin component, and a melamine resin can be used. The crosslinking agent of the present invention preferably uses 5 to 10% of hexamethylmethoxymelamine (HMMM) resin having six methyl methoxy groups in terms of degree of curing, processability, and hardness.
멜라민 가교제 중 이미드 멜라민은 경화도가 너무 빨라 파핑(Popping, 도막기포)이 발생하고 가공성에 저해될 수 있고, 부톡시 멜라민은 경화도 저하로 경도에 취약할 수 있어 메톡시 멜라민이 바람직하다. 또한, 5% 미만 사용시 경화도가 낮게 되어 경도, 스크래치성에 저해가 되고, 10% 초과 사용 시 경화도가 높게 되어 가공성에 저해가 되므로 5~10% 범위로 함유됨이 바람직하다.Among melamine crosslinkers, imide melamine has a degree of curing that is too fast, which can cause popping (foam bubbles in the coating film) and hinder processability, and butoxy melamine can be vulnerable to hardness due to low degree of curing, so methoxy melamine is preferred. In addition, when used at less than 5%, the degree of curing becomes low, hindering hardness and scratch resistance, and when used at more than 10%, the degree of curing becomes high, hindering processability, so it is preferred to contain it at a range of 5 to 10%.
[안료][Pigment]
본 발명에 사용되는 안료는 현무암 무늬를 저해하지 않아야 하므로, 일반적인 유무기안료 보다 메탈릭안료나 MICA(펄)안료가 적합하지만, 용도에 따라 유무기안료도 사용가능하다. 일반적으로 메탈릭안료나 MICA안료는 색상에 따라 0.5~5%가 적당하며, 유무기안료는 3% 미만을 사용하여야 현무암무늬에 저해가 되지 않는다.The pigment used in the present invention should not interfere with the basalt pattern, so metallic pigments or MICA (pearl) pigments are more suitable than general organic and inorganic pigments, but organic and inorganic pigments can also be used depending on the purpose. Generally, 0.5 to 5% of metallic pigments or MICA pigments are suitable depending on the color, and organic and inorganic pigments should be used at less than 3% so as not to interfere with the basalt pattern.
[용제][solvent]
용제는 도료 제조시 수지내 포함되어 있는 용제와 후첨으로 투입된 용제를 기본적으로 함유하며, 도료 도장 시 유동성이 부족하거나, 점도가 높아 도장하기 어려울 경우에 도장하기 알맞게 희석하여 점도를 낮추는 역할을 한다. 본 발명의 도료 조성물에 첨가되는 용제는 유기용제이며, 수지 및 기타 성분을 분산시킬 수 있어야 한다. The solvent basically contains the solvent contained in the resin during the manufacture of the paint and the solvent added later, and when the paint has insufficient fluidity or is difficult to paint due to high viscosity, it dilutes it to an appropriate level for painting and lowers the viscosity. The solvent added to the paint composition of the present invention is an organic solvent and must be able to disperse the resin and other components.
본 발명에서는 상기 유기용제로서 탄화수소계 유기용제를 이용하며, 이를 전체 도료 조성물에 대하여 35~50% 범위로 함유한다. 보다 바람직하게는, 상기 탄화수소계 유기용제에, 알콜계, Ester계, Ketone계 유기 용제를 단독 또는 혼합하여 사용하는 것이다. In the present invention, a hydrocarbon-based organic solvent is used as the organic solvent, and is contained in a range of 35 to 50% with respect to the entire paint composition. More preferably, an alcohol-based, ester-based, or ketone-based organic solvent is used alone or in combination with the hydrocarbon-based organic solvent.
[첨가제][Additives]
상기 도료 조성물의 기본적인 구성요소로는 수지, 안료, 용제이지만, 이들만으로는 도료에 요구되는 많은 성능을 만족시키기 어렵다. 따라서 기타 다양한 첨가제를 이용하여 도료 물성의 개량할 필요가 있으며, 첨가제의 배합량은 적지만 도료에 있어서 아주 중요하다.The basic components of the above paint composition are resin, pigment, and solvent, but it is difficult to satisfy many performances required for paint with these alone. Therefore, it is necessary to improve the paint properties by using various other additives, and although the amount of additives is small, they are very important for paint.
일반적으로 첨가제의 종류는 기능과 용도에 따라 나누어지며, 나아가, 도료의 종류에 따라서도 달라지는 경우가 있으므로 도료에 적합한 첨가제를 선택할 필요가 있다.In general, the types of additives are divided according to their function and use, and furthermore, they may differ depending on the type of paint, so it is necessary to select an additive that is suitable for the paint.
본 발명에서는 상기 첨가제로 폴리아마이드 왁스를 사용함을 특징으로 한다. 상기 아마이드 왁스 첨가제는 도막 표면에 현무암무늬의 외관 및 질감을 형성하는데 핵심적인 역할을 한다. 상기 아마이드 왁스는 건조 과정 중 Melting Point 이상의 고온에서 열을 받아 Powder 형태가 녹아 표면장력이 높은 기본 도료와 현무암무늬로 뭉쳐짐으로 특유의 현무암 무늬가 발현된다. The present invention is characterized by using polyamide wax as the additive. The amide wax additive plays a key role in forming the appearance and texture of a basalt pattern on the surface of the coating. The amide wax is heated at a high temperature above the melting point during the drying process, melts in powder form, and clumps together with the base paint having high surface tension to form a basalt pattern, thereby expressing a unique basalt pattern.
본 발명에서 상기 폴리아마이드 왁스는 Melting Point 120~140℃, 평균입자size 30~50㎛인 Powder형 왁스를 사용하며 0.01% 이상 0.1% 미만의 범위로 첨가함이 바람직하다. 만일 상기 왁스가 0.01% 미만으로 투입 시 현무암무늬가 발현되지 않고, CRATER(하지끼)형태의 외관이 발현되며, 0.1% 이상으로 투입시 요철(凹凸)무늬가 잘 되지 않고, 평평하며, 큰 오렌지필(ORNAGE-PEEL)의 무늬가 발현될 여지가 있다. In the present invention, the polyamide wax is preferably a powder-type wax having a melting point of 120 to 140°C and an average particle size of 30 to 50 μm, and is preferably added in the range of 0.01% to 0.1%. If the wax is added in an amount of less than 0.01%, the basalt pattern is not expressed, and a crater-shaped appearance is expressed, and if it is added in an amount of 0.1% or more, the uneven pattern is not well expressed, and a flat and large orange peel pattern may be expressed.
한편 레벨링제는 현무암무늬 발현에 저해가 됨으로 본 발명에서는 사용하지 않는다.Meanwhile, a leveling agent is not used in the present invention because it hinders the development of basalt patterns.
그리고 롤코팅에서 발생되는 기포를 제거하기 위해 사용되는 소포제는 최소량을 사용해야 하며, 본 발명에서는 실리콘(Silicone) free인 Acrylate류의 소포제를 사용하며 0.5~1.0%를 사용함이 바람직하다. And, the defoaming agent used to remove air bubbles generated during roll coating should be used in a minimum amount, and in the present invention, a defoaming agent of the Acrylate type that is silicone-free is used, and it is preferable to use 0.5 to 1.0%.
다음으로, 본 발명의 현무암무늬 컬러강판을 설명한다. Next, the basalt patterned color steel plate of the present invention is described.
도 1은 본 발명의 실시예에 따른 컬러 강판의 단면을 모식적으로 나타낸 그림이다. Figure 1 is a drawing schematically showing a cross-section of a color steel plate according to an embodiment of the present invention.
도 1에 나타난 바와 같이, 본 발명의 질감형 컬러강판(10)은, 소지 강판(1), 상기 소지 강판의 적어도 일면에 형성된 용융도금층(3), 상기 용융도금층 상에 형성된 하도 겸용 베이스층(5) 및 상기 베이스층 상에 형성된 상도 도장층(7)을 포함한ㄷ다As shown in Fig. 1, the textured color steel plate (10) of the present invention includes a base steel plate (1), a molten galvanized layer (3) formed on at least one surface of the base steel plate, a base layer (5) for use as a lower coating formed on the molten galvanized layer, and a topcoat layer (7) formed on the base layer.
또한 본 발명에서는, 상기 용융도금층(3)과 상기 하도 겸용 베이스층(4) 사에에 전처리층(4)을 형성할 수도 있으며, 상기 상도 도장층(7)상에 클리어층(9)을 형성할 수도 있다. In addition, in the present invention, a pretreatment layer (4) may be formed between the molten plating layer (3) and the base layer (4) for both lower and upper coatings, and a clear layer (9) may be formed on the upper coating layer (7).
본 발명의 컬러강판(10)은 먼저, 소지강판(1)을 포함한다. 본 발명에서 상기 소지강판(1)의 특정한 조성 및 종류 등에 제한되지 않으며, 냉연강판 또는 열연강판 등 다양한 강종의 강판을 제한없이 이용할 수 있다. The color steel plate (10) of the present invention first includes a base steel plate (1). The present invention is not limited to a specific composition and type of the base steel plate (1), and various types of steel plates such as cold-rolled steel plates or hot-rolled steel plates can be used without limitation.
본 발명의 컬러강판(10)은 또한 상기 소지강판(1) 상에 형성된 용융도금층(3)을 포함한다. 본 발명에서 상기 용융도금층(3)은 아연도금층, 알루미늄도금층, 아연-알루미늄 합금 도금층 및 아연-알루미늄-마그네슘 합금 도금층 중 하나 일 수 있다. The color steel plate (10) of the present invention also includes a hot-dip galvanized layer (3) formed on the base steel plate (1). In the present invention, the hot-dip galvanized layer (3) may be one of a zinc-plated layer, an aluminum-plated layer, a zinc-aluminum alloy plating layer, and a zinc-aluminum-magnesium alloy plating layer.
또한 본 발명의 컬러강판(10)은, 선택적으로, 상기 용융도금층(2)상에 형성된 전처리층(4)을 포함할 수 있으며, 본 발명은 이러한 전처리층(4)을 형성하는 구체적인 방법에 제한되지 않는다. 예를 들어, 상기 전처리층(4)은 인산피막층, 크로메이트, 또는 논(non)-크로메이트 화성피막층일 수 있다. In addition, the color steel plate (10) of the present invention may optionally include a pretreatment layer (4) formed on the molten plating layer (2), and the present invention is not limited to a specific method of forming such a pretreatment layer (4). For example, the pretreatment layer (4) may be a phosphate film layer, a chromate film, or a non-chromate film layer.
이와 같이, 상기 용융도금층(3) 표면에 인산피막, 크로메이트, 또는 논-크로메이트 화성피막을 형성함으로써 소지 강판(1)과 후술하는 하도 도장층(5)과의 밀착력을 높여주고, 제품의 내식성을 향상시키는 역할을 한다. In this way, by forming a phosphate film, chromate film, or non-chromate film on the surface of the molten plating layer (3), the adhesion between the base steel plate (1) and the undercoat layer (5) described below is increased, and the corrosion resistance of the product is improved.
본 발명에서 상기 전처리층(4)의 두께는 30~90㎎/㎡로 인 것이 바람직하다.In the present invention, the thickness of the pretreatment layer (4) is preferably 30 to 90 mg/㎡.
또한 본 발명에 따른 현무암무늬 컬러강판은 상기 용융도금층(3) 또는 전처리층(4)상에 형성된 하도 겸용 베이스층(5)을 포함한다. 상기 하도 겸용 베이스층(5)은, 중량%로, 수평균 분자량(Mn)이 15,000~20,000이고 유리전이온도(Tg)가 5~10℃, OH기가 5~15mgKOH/g, 산가가 3mgKOH/g이하인 변성 폴리에스테르 수지: 60~70%, 헥사메틸메톡시멜라민(HexaMethylMethoxyMelamine) 가교제: 5~10%, 디노닐나프탈렌술폰산(DiNonylNaphthaleneSulfonicAcid) 경화촉진제: 0.5~1.5%, 백색 포함한 유색안료: 15~20%, 칼슘실리카계 방청안료:1~5%, 소포제,레벨링제,부착증진제 및 소광제: 각 0 ~ 2%를 포함하여 조성됨이 바람직하다. In addition, the basalt patterned color steel plate according to the present invention includes a base layer (5) that is also used as a primer, formed on the molten plating layer (3) or the pretreatment layer (4). The above-mentioned dual-purpose base layer (5) is preferably composed of, in wt%, a modified polyester resin having a number average molecular weight (Mn) of 15,000 to 20,000, a glass transition temperature (Tg) of 5 to 10°C, an OH group of 5 to 15 mgKOH/g, and an acid value of 3 mgKOH/g or less: 60 to 70%, a hexamethylmethoxymelamine crosslinking agent: 5 to 10%, a dinonylnaphthalenesulfonic acid curing accelerator: 0.5 to 1.5%, a colored pigment including white: 15 to 20%, a calcium silica-based anti-rust pigment: 1 to 5%, and 0 to 2% each of an anti-foaming agent, a leveling agent, an adhesion promoting agent, and a matting agent.
아울러, 본 발명에서 상기 하도 겸용 베이스(5)의 도막두께는 10~20㎛인 것이 바람직하다.In addition, in the present invention, it is preferable that the film thickness of the combined base (5) be 10 to 20 ㎛.
그리고 본 발명의 질감형 컬러강판은 또한 상기 하도 겸용 베이스층(5)상에 형성된 상도 도장층(7)을 포함한다. In addition, the textured color steel plate of the present invention also includes a topcoat layer (7) formed on the lower and upper compatible base layer (5).
본 발명에서 상기 상도 도장층(7)은 최종 제품의 외관과 광택도를 부여하고, 최종 제품의 가공성, 내구성, 내식성, 내후성 등 물리적 특성을 결정하는 중요한 역할을 한다.In the present invention, the topcoat layer (7) provides the appearance and glossiness of the final product and plays an important role in determining the physical properties of the final product, such as processability, durability, corrosion resistance, and weather resistance.
본 발명에서 상기 상도 도장층(7)은, 중량%로, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 20~30℃, OH기가 60~70mgKOH/g, 산가가 6~10 mgKOH/g인 변성 폴리에스테르 수지: 50~60%, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 -40~-50℃인 SOFT 폴리에스테르 수지: 20~30%, 헥사메틸메톡시멜라민(HexaMethylMethoxyMelamine) 가교제: 5~10%, 디노닐나프탈렌술폰산(DiNonylNaphthaleneSulfonicAcid) 경화촉진제: 0.5~1.5%, 안료: 0.5~5.0%, 폴리아마이드 왁스: 0.01% 이상 0.1% 미만 및 실리콘 free 소포제: 0.5~1.0%를 포함하는 것이 바람직하다. In the present invention, the topcoat layer (7) comprises, in wt%, 50 to 60% of a modified polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000, a glass transition temperature (Tg) of 20 to 30°C, an OH group of 60 to 70 mgKOH/g, and an acid value of 6 to 10 mgKOH/g, 20 to 30% of a SOFT polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of -40 to -50°C, 5 to 10% of a hexamethylmethoxymelamine crosslinker, 0.5 to 1.5% of a dinonylnaphthalenesulfonic acid curing accelerator, and 0.5 to 5.0% of a pigment. Polyamide wax: It is preferable to include 0.01% or more and less than 0.1% and silicone-free defoaming agent: 0.5 to 1.0%.
본 발명에서 상기 상도 도장층(7)을 이루는 조성 성분은 실제상 상술한 상도 도료층의 구성성분과 동일하며, 해당 성분의 첨가 이유 또한 상술한 바와 같다. 다만 본 발명의 상도 도료층에는 유기용매가 다량 포함됨에 비하여, 상기 상도 도장층(7)에는 유기용매가 포함되지 않는다. 왜냐하면 상기 유기용매는 상기 상도 도료층의 코팅 후 경화시 모두 기화되어 버리기 때문이다. 따라서 상기 상도 도장층(7)을 이루는 각 조성성분의 함량은 상술한 상도 도료층 대비 유기용매를 제외한 성분들의 합에 대한 중량비를 나타낸 것이다. In the present invention, the composition components forming the topcoat layer (7) are actually the same as the composition components of the topcoat layer described above, and the reason for adding the corresponding components is also as described above. However, while the topcoat layer of the present invention contains a large amount of organic solvent, the topcoat layer (7) does not contain an organic solvent. This is because the organic solvent completely evaporates upon curing after coating the topcoat layer. Therefore, the content of each composition component forming the topcoat layer (7) represents the weight ratio of the sum of the components excluding the organic solvent compared to the topcoat layer described above.
또한, 상기 상도도장층의 두께는 10~30㎛인 것이 바람직하다. 만일, 상기 상도 도장층의 두께가 10㎛ 미만인 경우에는 무늬가 작아 현무암무늬가 발현되지 않고, 도막경화도,경도,가공성 등이 저하되며, 30㎛ 초과시에는 도막에 기포가 발생할 수 있다. In addition, it is preferable that the thickness of the topcoat layer be 10 to 30 ㎛. If the thickness of the topcoat layer is less than 10 ㎛, the pattern is small and the basalt pattern is not expressed, and the coating hardness, hardness, and workability are reduced. If it exceeds 30 ㎛, bubbles may occur in the coating.
한편 본 발명에서는 상기 상도 도장층(7)의 도장 후 수요가의 요구(무광)에 따라 클리어 도막층(9)을 추가하여 도장할 수도 있으며, 이때, 그 도막두께는 5~20㎛인 것이 바람직하다. Meanwhile, in the present invention, after painting the above-mentioned topcoat layer (7), a clear coat layer (9) may be added and painted according to the customer's requirements (matte finish). At this time, the coat thickness is preferably 5 to 20 ㎛.
이하, 실시예를 통하여 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail through examples.
(실시예)(Example)
이하, 본 발명의 목적을 달성하는데, 적합한 도료를 선정하기 위한 종래예, 비교예 및 실시예에 대해 더욱 상세히 살펴보기로 한다.Hereinafter, conventional examples, comparative examples, and examples for selecting a suitable paint to achieve the purpose of the present invention will be examined in more detail.
이때 사용된 소재의 규격 및 시험조건, 시편 제작방법 등은 아래와 같다.The specifications of the materials used, test conditions, and specimen production methods are as follows.
가) 소재규격 및 작업조건a) Material specifications and working conditions
- 시험소재 : 0.6T MACOSTA강판(Zinc Magnesium Aluminium Alloy Coated Steel)- Test material: 0.6T MACOSTA steel plate (Zinc Magnesium Aluminum Alloy Coated Steel)
- 전처리 : 90㎎/㎡ 크로메이트- Pretreatment: 90 mg/㎡ chromate
- 건조도막 : 하도겸베이스 13㎛ / 상도 18㎛- Dry film: Base coat 13㎛ / Top coat 18㎛
- MPT : 하도겸베이스 216℃ / 상도 224℃- MPT: Hadokyeom Base 216℃ / Sangdo 224℃
나) 시편제작방법A) Method of making a psalm
0.6T MACOSTA강판을 메틸에틸케톤으로 탈지하고, 하도겸베이스층를 건조 도막 15㎛로 바코팅한 후 MPT(Metal Peak Temperature) 216℃로 소부하였다. 그리고 그 위에 하기 표 1의 각각의 도료를 건조도막두께 20㎛가 되도록 바코팅한 후, PMT 224℃로 소부하여 상도 도장층을 갖는 시험시편을 제작하였다. 이때, 각 시험시편에 있어서, 상기 하도베이층은, 중량%로, 수평균 분자량(Mn)이 15,000~20,000이고 유리전이온도(Tg)가 5~10℃, OH기가 5~15mgKOH/g, 산가가 3mgKOH/g이하인 변성 폴리에스테르 수지: 40%, 헥사메틸메톡시멜라민 가교제: 6.7%, 디노닐나프탈렌술폰산 경화촉진제: 1.1%, 백색 포함한 유색안료: 18%, 유기용제:28%, 칼슘실리카계 방청안료:3%, 소포제: 0.5% 레벨링제:1.0%, 부착증진제:0.5% 및 소광제: 1%를 포함하는 도료를 이용하여 마련되었다. A 0.6T MACOSTA steel plate was degreased with methyl ethyl ketone, bar-coated with a base layer as a primer to a dry film thickness of 15 μm, and then fired at a MPT (Metal Peak Temperature) of 216°C. Then, each paint shown in Table 1 below was bar-coated to a dry film thickness of 20 μm, and then fired at a PMT of 224°C to produce a test specimen having a topcoat layer. At this time, for each test specimen, the lower layer was prepared using a paint containing, in wt%, a number average molecular weight (Mn) of 15,000 to 20,000, a glass transition temperature (Tg) of 5 to 10°C, an OH group of 5 to 15 mgKOH/g, and an acid value of 3 mgKOH/g or less, a modified polyester resin: 40%, a hexamethylmethoxymelamine crosslinking agent: 6.7%, a dinonylnaphthalenesulfonic acid curing accelerator: 1.1%, a colored pigment including white: 18%, an organic solvent: 28%, a calcium silica-based anti-rust pigment: 3%, an anti-foaming agent: 0.5%, a leveling agent: 1.0%, an adhesion promoter: 0.5%, and a matting agent: 1%.
구체적인 시험편 구성 및 제조방법은 아래와 같다. The specific test specimen composition and manufacturing method are as follows.
(1)종래예(1) Conventional example
MACOSTA강판의 표면에 두께 90㎎/㎡ 크로메이트 전처리를 실시하였다. 그리고 상기 전처리층 위에 전술한 바와 같은 조성을 갖는 하도겸용 베이스도료를 건조도막 두께 13㎛으로 도포한 후, MPT 216℃의 조건으로 이를 건조하였다. 이후, 그 표면에 상도 도료 조성물[수평균 분자량(Mn)이 2,000~3,000이고, 유리전이온도(Tg)가 20~30℃인 폴리에스테르 수지 55중량%, 헥사메틸메톡시멜라민 가교제 8%, 디노닐나프탈렌술폰산 경화촉진제 1%, 안료 1중량%, 용제 31중량 % 및 첨가제 함유]을 도포한 후, MPT 224℃의 조건으로 건조하여 건조 도막 두께 18.0㎛의 상도 도장층을 형성하였다. A chromate pretreatment having a thickness of 90 mg/㎡ was performed on the surface of the MACOSTA steel plate. Then, a base paint for both undercoats and topcoats having the composition described above was applied on the pretreatment layer with a dry film thickness of 13 μm, and then dried under the condition of MPT 216°C. Thereafter, a topcoat composition [containing 55 wt% of a polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of 20 to 30°C, 8% of a hexamethylmethoxymelamine crosslinking agent, 1% of a dinonylnaphthalenesulfonic acid curing accelerator, 1 wt% of a pigment, 31 wt% of a solvent, and additives] was applied to the surface, and then dried under the condition of MPT 224°C to form a topcoat layer with a dry film thickness of 18.0 μm.
(2)비교예1(2) Comparative Example 1
MACOSTA강판의 표면에 두께 90㎎/㎡ 크로메이트 전처리를 실시하였다. 그리고 상기 전처리층 위에 전술한 바와 같은 조성을 갖는 하도겸용 베이스도료를 건조도막 두께 13㎛으로 도포한 후, MPT 216℃의 조건으로 이를 건조하였다. 이후, 그 표면에 상도 도료 조성물[수평균 분자량(Mn)이 2,000~3,000이고, 유리전이온도(Tg)가 20~30℃인 폴리에스테르 수지 55중량%, 헥사메틸메톡시멜라민 가교제 8%, 디노닐나프탈렌술폰산 경화촉진제 1%, 안료 1중량%, 용제 34중량%, 폴리아마이드 왁스 0.1% 및 소포제 함유]을 도포한 후, MPT 224℃의 조건으로 건조하여 건조 도막 두께 18.0㎛의 상도 도장층을 형성하였다. A chromate pretreatment having a thickness of 90 mg/㎡ was performed on the surface of the MACOSTA steel plate. Then, a base paint for both undercoats and topcoats having the composition described above was applied on the pretreatment layer with a dry film thickness of 13 μm, and then dried under the condition of MPT 216°C. Thereafter, a topcoat composition [containing 55 wt% of a polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of 20 to 30°C, 8% of a hexamethylmethoxymelamine crosslinking agent, 1% of a dinonylnaphthalenesulfonic acid curing accelerator, 1 wt% of a pigment, 34 wt% of a solvent, 0.1% of a polyamide wax, and an antifoaming agent] was applied to the surface, and then dried under the condition of MPT 224°C to form a topcoat layer with a dry film thickness of 18.0 μm.
(4)비교예2 (4) Comparative Example 2
MACOSTA강판의 표면에 두께 90㎎/㎡ 크로메이트 전처리를 실시하였다. 그리고 상기 전처리층 위에 전술한 바와 같은 조성을 갖는 하도겸용 베이스도료를 건조도막 두께 13㎛으로 도포한 후, 이를 MPT 216℃의 조건으로 건조하였다. 이후, 그 표면에 상도도료 조성물[수평균 분자량(Mn)이 2,000~3,000이고, 유리전이온도(Tg)가 20~30℃인 폴리에스테르 수지 40중량%, 수평균 분자량(Mn)이 2,000~3,000이고, 유리전이온도(Tg)가 -40~-50℃인 SOFT 폴리에스테르 수지 15 중량%, 헥사메틸메톡시멜라민 가교제 8%, 디노닐나프탈렌술폰산 경화촉진제 1%, 안료 1중량%, 용제 33.992중량%, 폴리아마이드 왁스 0.008% 및 소포제 함유]을 도포한 후, MPT 224℃의 조건으로 건조하여 건조 도막 두께 18.0㎛의 상도 도장층을 형성하였다. The surface of the MACOSTA steel plate was subjected to a chromate pretreatment with a thickness of 90 mg/㎡. Then, a base paint for both coatings and primers having the composition described above was applied on the pretreatment layer with a dry film thickness of 13 μm, and then dried under the condition of MPT 216°C. Thereafter, a topcoat composition [containing 40 wt% of a polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of 20 to 30°C, 15 wt% of a SOFT polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of -40 to -50°C, 8% of a hexamethylmethoxymelamine crosslinker, 1% of a dinonylnaphthalenesulfonic acid curing accelerator, 1% of a pigment, 33.992 wt% of a solvent, 0.008% of a polyamide wax, and an antifoaming agent] was applied to the surface, and then dried under the condition of an MPT of 224°C to form a topcoat layer having a dry film thickness of 18.0 μm.
(5)발명예1(5) Invention Example 1
MACOSTA강판의 표면에 두께 90㎎/㎡ 크로메이트 전처리를 실시하였다. 그리고 상기 전처리층 위에 전술한 바와 같은 조성을 갖는 하도겸용 베이스도료를 건조도막 두께 13㎛으로 도포한 후, MPT 216℃의 조건으로 이를 건조하였다. 이후, 그 표면에 상도 도료 조성물[수평균 분자량(Mn)이 2,000~3,000이고, 유리전이온도(Tg)가 20~30℃인 폴리에스테르 수지 40중량%, 수평균 분자량(Mn)이 2,000~3,000이고, 유리전이온도(Tg)가 -40~-50℃인 SOFT 폴리에스테르 수지 15 중량%, 헥사메틸메톡시멜라민 가교제 8%, 디노닐나프탈렌술폰산 경화촉진제 1%, 안료 1 중량%, 케톤,에스테르 용제 14중량%, 하이드로카본 용제 20중량%, 폴리아마이드 왁스 0.05% 및 소포제 함유]을 도포한 후, MPT 224℃의 조건으로 건조하여 건조 도막 두께 18.0㎛의 상도 도장층을 형성하였다. The surface of the MACOSTA steel plate was subjected to a chromate pretreatment with a thickness of 90 mg/㎡. Then, a base paint for both coatings and primers having the composition described above was applied on the pretreatment layer with a dry film thickness of 13 μm, and then dried under the condition of MPT 216°C. Thereafter, a topcoat composition [containing 40 wt% of a polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of 20 to 30°C, 15 wt% of a SOFT polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of -40 to -50°C, 8% of a hexamethylmethoxymelamine crosslinker, 1% of a dinonylnaphthalenesulfonic acid curing accelerator, 1% of a pigment, 14% of a ketone/ester solvent, 20% of a hydrocarbon solvent, 0.05% of a polyamide wax, and an antifoaming agent] was applied to the surface, and then dried under the condition of an MPT of 224°C to form a topcoat layer having a dry film thickness of 18.0 μm.
*표 1에서 X는 열위, △는 보통, ○는 양호, ◎는 우수를 나타냄*In Table 1, X indicates inferior, △ indicates average, ○ indicates good, and ◎ indicates excellent.
상기 제작된 시편들의 도막 물성 비교 시험 결과를 상기 표 1에 나타내었다. 구체적으로, 상기 제조방법으로 제조된 각각의 현무암무늬 컬러강판에 대해, 광택, 경화도, 가공성, 부착성, 연필경도, 현무암무늬를 평가하여 그 결과를 상기 표 1에 나타내었다. The results of the comparative test of the film properties of the above-mentioned manufactured specimens are shown in Table 1. Specifically, for each basalt patterned color steel plate manufactured by the above-mentioned manufacturing method, the gloss, hardness, workability, adhesion, pencil hardness, and basalt pattern were evaluated, and the results are shown in Table 1.
이때, 그 구체적인 물성 평가기준은 아래와 같다. At this time, the specific property evaluation criteria are as follows.
광택gloss
ASTM D523 시험방법에 따라 시험판을 수평으로 놓고 광택기로 60°로 3회 측정후 평균값을 기록하였다.According to the ASTM D523 test method, the test plate was placed horizontally and measured three times at 60° with a polisher, and the average value was recorded.
경화도Hardening degree
ASTM D5402 시험방법에 따라 시험판을 수평으로 놓고 한 손으로 고정하고, 나머지 한 손으로는 손가락에 거즈 4~6매 정도를 감아 적당한 양의 용제(METHYL ETHYL KETONE)를 묻혀서 상하로 도막면을 문질러서, 소재의 노출이 있을 때 시험을 종료하고 이때까지의 횟수를 측정하였다.According to the ASTM D5402 test method, the test plate was placed horizontally and held in place with one hand, and with the other hand, 4 to 6 pieces of gauze were wrapped around the finger, an appropriate amount of solvent (METHYL ETHYL KETONE) was applied, and the coating surface was rubbed up and down. The test was terminated when the material was exposed, and the number of times up to that point was measured.
가공성Processability
KS D 3520 굽힘시험 시험방법에 따라 테스트 시편을 제조한 후, 바이스를 이용하여 180도 T-Bending을 하여 CRACK 유무를 평가하였다.After manufacturing the test specimen according to the KS D 3520 bending test method, the presence or absence of cracks was evaluated by performing 180-degree T-Bending using a vice.
부착성Adhesiveness
STM D3359 시험방법에 따라 평가하였다. 시험편을 1mm간격 # 형태로 cross-cut한 후, TESTER(Erichsen tester)에 놓고 반지름형상의 펀치을 인접시킨후 일정한 깊이(6mm)로 밀어내어 성형부위에 TAPE밀착 후 벗겨내어 도막박리 여부를 관찰하였다.It was evaluated according to the STM D3359 test method. After cross-cutting the test piece in the shape of # at 1mm intervals, it was placed on the TESTER (Erichsen tester), and a radius-shaped punch was placed adjacent to it, and then it was pushed out to a certain depth (6mm) and the TAPE was adhered to the molded area and then peeled off to observe whether the coating was peeled off.
연필경도Pencil hardness
KS D 3520 연필경도시험 시험방법에 따라 평가하였다. 시험판을 수평으로 놓고, 한 손으로 고정하고, 심이 2㎜정도 노출되도록 끝부분이 평활하고 각이 날카롭게 되도록 깎은 연필로 45도 각도로 1㎏의 하중을 가하여 길이가 10cm이상 되도록 선을 5회 반복하여 긋고, 시험부위를 지우개로 지운 후 육안으로 관찰하였다.The test was conducted according to the KS D 3520 pencil hardness test method. The test plate was placed horizontally, held with one hand, and a pencil sharpened to have a smooth tip and a sharp angle so that the lead was exposed by about 2 mm was applied at a 45-degree angle with a load of 1 kg, and a line was drawn 5 times so that the length was 10 cm or longer, and the test area was erased with an eraser and observed with the naked eye.
현무암무늬Basalt pattern
시험시편을 수평 및 각도를 움직이면서 무늬크기, 무늬의 일정함, 불량현상 유무를 평가하였다.The pattern size, pattern consistency, and presence of defects were evaluated by moving the test specimen horizontally and at an angle.
상기 표 1에 나타난 바와 같이, 본 발명의 주 혼합수지에 가교제, 경화촉진제, 안료, 용제, 폴리아마이드 왁스 및 실리콘 free 소포제가 적정량 혼합된 상도 도료 조성물을 이용하여 상도 도장층을 제조한 발명예1의 경우, 광택, 경화도, 가공성, 부착성, 연필경도, 현무암무늬의 측면에서 모두 우수한 결과를 가져옴을 알 수 있다. As shown in Table 1 above, in the case of Invention Example 1, in which a topcoat layer was manufactured using a topcoat composition in which an appropriate amount of a crosslinking agent, a curing accelerator, a pigment, a solvent, a polyamide wax, and a silicone-free defoaming agent were mixed into the main mixed resin of the present invention, it can be seen that excellent results were obtained in terms of gloss, degree of curing, processability, adhesion, pencil hardness, and basalt pattern.
이에 반하여, 폴리아마이드 왁스가 투입되지 않은 종래예는 일정한 현무암 무늬가 발생하지 않고 CRATER 형태의 외관이 발생하였다. In contrast, in the conventional example where polyamide wax was not added, a consistent basalt pattern did not occur and a crater-shaped appearance occurred.
또한 수평균 분자량(Mn)이 2,000~3,000이고, 유리전이온도(Tg)가 20~30℃인 폴리에스테르 수지를 주수지로 이용한 비교예1은 폴리아마이드 왁스가 첨가제로 투입됨에도 불구하고, 가공성에서 2T CRACK이 발생하였다.In addition, Comparative Example 1, which used a polyester resin as the main resin with a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of 20 to 30°C, showed a 2T CRACK in processability despite the addition of polyamide wax as an additive.
또한 본 발명의 도료 조성에서 폴리아마이드 왁스가 0.008%로 이용된 비교예3도 티형태의 외관으로 만족스러운 현무암무늬가 발현되지 않았다. In addition, in Comparative Example 3, where polyamide wax was used at 0.008% in the paint composition of the present invention, a satisfactory basalt pattern was not expressed due to the T-shaped appearance.
상술한 바와 같이, 본 발명의 상도 도료조성물을 이용하여 제조된 발명예1의 컬러강판이 그렇지 못한 종래예 및 비교예 1-2 대비 기존 PCM강판으로 구현하지 못했던 현무암무늬의 칼라강판을 효과적으로 제조할 수 있음을 확인할 수 있다. As described above, it can be confirmed that the color steel plate of Invention Example 1 manufactured using the color coating composition of the present invention can effectively manufacture a color steel plate with a basalt pattern that could not be achieved with the existing PCM steel plate, compared to the conventional examples and Comparative Examples 1-2 that did not.
한편 도 2는 종래 액상이나 분체 함마톤 도장강판에 대한 표면 사진이며, 도 3은 본 발명예1에 따라 제조된 질감형 컬러강판에 대한 표면 사진이다. 도 2-3의 비교로부터 알 수 있는 바와 같이, 본 발명의 컬러강판이 종래재 대비 효과적으로 현무암무늬를 구현할 수 있음을 확인할 수 있다. Meanwhile, Fig. 2 is a surface photograph of a conventional liquid or powder hammer-tone coated steel plate, and Fig. 3 is a surface photograph of a textured color steel plate manufactured according to Example 1 of the present invention. As can be seen from the comparison of Figs. 2 and 3, it can be confirmed that the color steel plate of the present invention can effectively implement a basalt pattern compared to a conventional material.
이상에서 설명한 바와 같이, 본 발명의 상세한 설명에서는 본 발명의 바람직한 실시 예에 관하여 설명하였으나, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 본 발명의 범주에서 벗어나지 않는 한도 내에서 여러 가지 변형이 가능함은 물론이다. 따라서 본 발명의 권리 범위는 설명된 실시 예에 국한되어 정해져서는 안 되며, 후술하는 청구범위뿐만 아니라, 이와 균등한 것들에 의해 정해져야 한다.As described above, in the detailed description of the present invention, preferred embodiments of the present invention have been described, but it is obvious to those skilled in the art that various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the rights of the present invention should not be limited to the described embodiments, but should be determined by the claims described below as well as their equivalents.
Claims (12)
In weight %, modified polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000, a glass transition temperature (Tg) of 20 to 30°C, an OH group of 60 to 70 mgKOH/g, and an acid value of 6 to 10 mgKOH/g: 30 to 40%, SOFT polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of -40 to -50°C: 10 to 20%, hexamethylmethoxymelamine crosslinking agent: 5 to 10%, dinonylnaphthalenesulfonic acid curing accelerator: 0.5 to 1.5%, pigment: 0.5 to 5%, hydrocarbon organic solvent: 35 to 50%, polyamide wax: 0.01% or more and less than 0.1%, and silicone-free defoaming agent: A PCM topcoat composition for manufacturing basalt patterned color steel plate containing 0.5 to 1.0%.
In the first paragraph, the polyamide wax is a PCM topcoat composition for manufacturing a basalt patterned color steel plate, which uses a powder-type wax having a melting point of 120 to 140°C and an average particle size of 30 to 50 μm.
In claim 1, a PCM topcoat composition for manufacturing a basalt patterned color steel plate, wherein an alcohol-based, ester-based, or ketone-based organic solvent is used alone or in combination with the hydrocarbon-based organic solvent.
A PCM coating composition for manufacturing a basalt patterned color steel plate, wherein, in claim 1, metallic, mica (pearl) or inorganic pigment is used as the pigment.
상기 소지강판의 적어도 일면에 형성된 용융도금층;
상기 용융도금층상에 형성된 하도 겸용 베이스층; 및
상기 하도 겸용 베이스층 상에 형성된 상도 도장층을 포함하고,
상기 상도 도장층은, 중량%로, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 20~30℃, OH기가 60~70mgKOH/g, 산가가 6~10 mgKOH/g인 변성 폴리에스테르 수지: 50~60%, 수평균 분자량(Mn)이 2,000~3,000이고 유리전이온도(Tg)가 -40~-50℃인 SOFT 폴리에스테르 수지: 20~30%, 헥사메틸메톡시멜라민 가교제: 5~10%, 디노닐나프탈렌술폰산 경화촉진제: 0.5~1.5%, 안료: 0.5~5.0%, 폴리아마이드 왁스: 0.01% 이상 0.1% 미만 및 실리콘 free 소포제: 0.5~1.0%를 포함하는 현무암무늬 컬러강판.
Steel plate;
A molten galvanized layer formed on at least one surface of the above steel plate;
A base layer for use as a lower coating formed on the molten plating layer; and
Including a topcoat coating layer formed on the above-mentioned base layer,
The above-mentioned coating layer comprises, in wt%, 50 to 60% of a modified polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000, a glass transition temperature (Tg) of 20 to 30°C, an OH group of 60 to 70 mgKOH/g, and an acid value of 6 to 10 mgKOH/g, 20 to 30% of a SOFT polyester resin having a number average molecular weight (Mn) of 2,000 to 3,000 and a glass transition temperature (Tg) of -40 to -50°C, 5 to 10% of a hexamethylmethoxymelamine crosslinking agent, 0.5 to 1.5% of a dinonylnaphthalenesulfonic acid curing accelerator, 0.5 to 5.0% of a pigment, 0.01 to 0.1% of a polyamide wax, and 0.5 to 1.0% of a silicone-free defoaming agent. Basalt patterned color steel plate including.
In claim 5, the undercoat and base layer comprises, in wt%, 60 to 70% of a modified polyester resin having a number average molecular weight (Mn) of 15,000 to 20,000, a glass transition temperature (Tg) of 5 to 10°C, an OH group of 5 to 15 mgKOH/g, and an acid value of 3 mgKOH/g or less, 5 to 10% of a hexamethylmethoxymelamine crosslinking agent, 0.5 to 1.5% of a dinonylnaphthalenesulfonic acid curing accelerator, 15 to 20% of a colored pigment including white, 1 to 5% of a calcium silica-based anti-rust pigment, and 0 to 2% each of an antifoaming agent, a leveling agent, an adhesion promoting agent, and a matting agent.
In the fifth paragraph, the polyamide wax is a powder-type polyamide wax having a melting point of 120 to 140°C and an average particle size of 30 to 50 μm, a basalt-patterned color steel plate
In claim 5, the molten plating layer is one of a zinc plating layer, an aluminum plating layer, a zinc-aluminum alloy plating layer, and/or a zinc-aluminum-magnesium alloy plating layer. A basalt-patterned color steel sheet.
A basalt-patterned color steel sheet, in claim 5, comprising a pretreatment layer comprised of one of a phosphate film layer, a chromate layer, and a non-chromate chemical conversion film layer between the base steel sheet and the molten galvanized layer.
In the fifth paragraph, the base layer for both lower and upper layers has a dry film thickness of 10 to 20 ㎛, a basalt-patterned color steel plate.
In claim 5, the paint layer has a dry film thickness of 10 to 30 ㎛, a basalt patterned color steel plate.
In claim 5, a basalt patterned color steel plate, wherein a clear coating layer having a dry coating thickness of 5 to 20 ㎛ is formed on the upper coating layer.
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