JP6710282B2 - 自動車中塗り用水溶性塗料組成物、及びこれを利用した自動車塗装方法 - Google Patents
自動車中塗り用水溶性塗料組成物、及びこれを利用した自動車塗装方法 Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims description 139
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- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 2
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- WYQZDQZBXHWQMW-UHFFFAOYSA-N 3-methylhexane-2,2-diamine Chemical compound CCCC(C)C(C)(N)N WYQZDQZBXHWQMW-UHFFFAOYSA-N 0.000 description 1
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
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- 150000007513 acids Chemical class 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 description 1
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- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
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- 150000004985 diamines Chemical class 0.000 description 1
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- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
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- IUGYQRQAERSCNH-UHFFFAOYSA-N pivalic acid Chemical compound CC(C)(C)C(O)=O IUGYQRQAERSCNH-UHFFFAOYSA-N 0.000 description 1
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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
- 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
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
- C09D5/022—Emulsions, e.g. oil in water
-
- 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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
-
- 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
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Dispersion Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
ポリエステル樹脂:酸価が20から50mgKOH/g範囲の親水性ポリエステル樹脂(KCC社、自体製造)
アクリル樹脂:酸価が40から100mgKOH/g範囲の親水性のアクリル樹脂(KCC社、自体製造)
水分散ウレタン樹脂:数平均分子量が20,000から50,000、酸価が4から8mgKOH/g、粒径が50から200nmの水分散ウレタン樹脂(KCC社、自体製造)
ウレタン樹脂1:数平均分子量が200から1,000、水酸基価が100から500mgKOH/g範囲のウレタン樹脂(KCC社、自体製造)
ウレタン樹脂2:数平均分子量が1,500から3,000、水酸基価が100から500mgKOH/g範囲のウレタン樹脂(KCC社、自体製造)
メラミン硬化剤:メチル基を含む通常のメラミン樹脂(Cymel 303、Cymel 325、Cymel 327など、ALLNEX社、LUWIPAL 052、062、072 BASF社)
流動性調節剤:アルカリ膨潤性増粘剤(Solthix A100、Lubrizol社、SN−Thickener 641、San nopco社)
顔料:通常適用される有機/無機顔料(二酸化チタン、カーボンブラック及びバリウムスルフェートなど)
紫外線吸収剤:ベンゾトリアゾール系の構造を有する吸収剤(Tinuvin 384−2、Ciba社)
微細二酸化チタン:平均粒径が20nm以下の二酸化チタン(UV−TITAN L181、Kemira社)
助溶剤:ブチルグリコール、ブチルカルビトール及びノルマルプロピルアルコールの混合溶剤
消泡剤:非シリコン系消泡剤(BYK−011、BYK−Chemie社)
分散剤:DISPERBYK−180、BYK−Chemie社
下記表1の組成に基づき、実施例1及び2、そして比較例1から5の塗料組成物を製造した。実施例1及び2は、本願発明の組成に基づいて製造された塗料組成物であり、比較例1及び2は、アクリル樹脂と水分散ウレタン樹脂を含まない油性塗料組成物であり、比較例3及び4は、水分散ウレタン樹脂を含んでウレタン樹脂は含まない油性塗料組成物である。比較例5は、用いられたウレタン樹脂の数平均分子量が2,000という点を除いては、本願発明の組成に基づいて製造された塗料組成物である。
実施例1及び2、並びに比較例1から5の塗料組成物の粘度、分散安定性、常温貯蔵性、熱貯蔵性、中塗り光沢、最終外観、中塗り乾燥性、付着性、耐衝撃性、耐水性、耐水付着性、耐寒チッピング性、塗装機器の作業性、中塗り流動性及び中塗り平滑性などの物性を評価した。
−粘度:Ford cup #4を利用して時間に応じた粘度を測定(水溶性塗料の場合、40から60秒の範囲で主に用いられ、油溶性塗料の場合、20から30秒の範囲で用いられる。この範囲で垂直部位の流動性が良好でダレ(sagging)があってはならない)。
−分散安定性:ヘグマンゲージ(Hegmann gauge)を利用した分散粒度の測定(水溶性塗料の分散安定性は最大5um以下と判断する)。
−中塗り光沢感:光沢計(Glossmeter 60’)を用いて反射値を測定。
−最終外観:自動車外観測定器であるWave Scan DOI(BYK Gardner)を適用して最終のCF valueを測定(現在、適用されている溶剤型2C1B Silver Metallic塗料システムのCF水準が55水準であり、高いほど有利である)。
−付着性:1mmのクロスカットを100個製作した後、スコッチテープを使って剥がした場合に問題がなければ、良好と判断(刃のクロスカッティング部位からも落ちるものがない時に優秀と判断する)。
−耐衝撃性:500gの円形のおもりを40cm以上の高さから落下させて塗膜に割れ目及び剥離現象が発生しない時に良好と判断。
−耐水付着性:耐水性浸漬の後に常温で1日放置してから付着性を評価(付着性と同様に判断する)。
−耐寒チッピング性:−40℃で3時間放置した後、50gのチッピングストーンを使って4barの圧力で50gのチッピングストーンを押し出して塗膜の表面を打つ方法を用いる(1mm以下サイズの損傷が10個以下の時、優秀と判定。1から2mm以下サイズの損傷が10個以下の時、良好と判定。2から3mm以下サイズの損傷が10個以下の時、普通と判定)。
−中塗り流動性:垂直側面部位に塗装した後、塗装面が流れ出す程度を評価。
−中塗り乾燥性:80℃で3分間乾燥した後、指触測定した時の粘つきの程度を評価。
−常温貯蔵性:塗料の安定性を評価することであって、25℃で7日を放置した後に塗料の粘度の変化を確認し、試験前に比べて粘度が2倍以上にならないこと。
−熱貯蔵性:塗料の安定性を評価することであって、43℃で7日を放置した後に塗料の粘度の変化を確認し、試験前に比べて粘度が2倍以上にならないこと。
−耐水性:塗装された試片を40℃の恒温水槽に240時間浸漬させた後、1時間常温で放置してから、碁盤目付着性評価で剥離試験を行って外観の異常の有無を目視で観察。試験後の外観は、軟化、白化、光沢不良、剥がれ、膨れ、変色などがあってはならず、浸漬部と未浸漬部の外観の違いがあってはならず、付着性評価を実施してM−2.5級以上でなければならない。
−中塗り平滑性:垂直側面部位に塗装した後、塗装面が平滑な程度を評価。
−塗装機器の作業性:エアスプレーまたはベル型塗装機器で塗装した時、霧化(微粒化)がよくできて均一で平滑な塗膜が形成されること。
Claims (7)
- 全体塗料組成物の重量を基準に、
ポリエステル樹脂20から50重量%と、
アクリル樹脂1から20重量%と、
水分散ウレタン樹脂1から15重量%と、
ウレタン樹脂1から15重量%と、
メラミン硬化剤10から30重量%とを含み、
前記水分散ウレタン樹脂は、数平均分子量が20,000から50,000であり、
前記ウレタン樹脂は、数平均分子量が200から1,000である自動車中塗り用水溶性塗料組成物。 - 前記ポリエステル樹脂は、酸価が20から50mgKOH/g範囲の親水性ポリエステル樹脂である請求項1に記載の自動車中塗り用水溶性塗料組成物。
- 前記アクリル樹脂は、酸価が40から100mgKOH/g範囲の親水性アクリル樹脂である請求項1に記載の自動車中塗り用水溶性塗料組成物。
- 前記水分散ウレタン樹脂は、酸価が4から8mgKOH/g、粒径が50から200nmの水分散ウレタン樹脂である請求項1に記載の自動車中塗り用水溶性塗料組成物。
- 前記ウレタン樹脂は、水酸基価が100から500mgKOH/gのウレタン樹脂である請求項1に記載の自動車中塗り用水溶性塗料組成物。
- 油溶性中塗り塗装ラインにおいて、請求項1に記載の塗料組成物を中塗りとして塗装することを含む自動車の塗装方法。
- 前記塗装後に常温で1から30分間乾燥工程を行うことを含む請求項6に記載の自動車の塗装方法。
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