JP3504872B2 - Coating film and method of forming coating film - Google Patents
Coating film and method of forming coating filmInfo
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- JP3504872B2 JP3504872B2 JP33109898A JP33109898A JP3504872B2 JP 3504872 B2 JP3504872 B2 JP 3504872B2 JP 33109898 A JP33109898 A JP 33109898A JP 33109898 A JP33109898 A JP 33109898A JP 3504872 B2 JP3504872 B2 JP 3504872B2
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Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、耐候性・耐薬品性
・耐食性・潤滑性に優れたコーティング組成物および塗
膜、ならびに塗膜の形成方法に関する。
【０００２】
【従来の技術とその問題点】従来ボルトやナット、橋
梁、鉄塔等には、主に耐食が目的でメッキや化成処理等
の表面処理やアルミニウムフレークを含んだ塗料が使用
されているが、アルミニウムフレークを含んだ従来の塗
料では、十分な耐候性がなく、数年経てば再塗装の必要
があり、その費用は莫大なものであった。また、ボルト
やナットにメッキ処理等を施した場合、滑り性が十分で
なく、余分な労力や時間を費やすだけでなく、ネジ山が
潰れたりメッキが剥げる等性能的にも十分なものではな
かった。さらに、潤滑を必要とする部品・部材には、定
期的に注油の必要があり、メンテナンスに多くの費用を
要していた。
【０００３】
【課題を解決するための手段】本発明者らは鋭意創意工
夫を重ねた結果、本発明を完成するに至った。すなわち
本発明は、次の組成物、塗膜および方法よりなる。
【０００４】１．（ａ）エポキシ系樹脂（硬化剤含む）
１０〜８０重量％、（ｂ）金属フレーク３〜５０重量
％、（ｃ）滑剤１〜４０重量％からなる（但し、合計量
は１００重量％を超えない。）耐食性コーティング組成
物。
【０００５】２．上記１記載の耐食性コーティング組成
物に溶剤を加えた塗料。
【０００６】３．溶融メッキ、溶射メッキ、電解メッ
キ、無電解メッキ、蒸着（ＣＶＤ、ＰＶＤ）、化成処
理、化学処理から選ばれる１種または２種以上の下地処
理層と、（ａ）エポキシ系樹脂１０〜８０重量％、
（ｂ）金属フレーク３〜５０重量％、（ｃ）滑剤１〜４
０重量からなる（但し、合計量は１００重量％を超えな
い。）耐食性コーティング層の少なくとも２層構造から
なる塗膜。
【０００７】４．被塗装物の塗装面を溶融メッキ、溶射
メッキ、電解メッキ、無電解メッキ、蒸着（ＣＶＤ、Ｐ
ＶＤ）、化成処理、化学処理から選ばれる１種または２
種以上の下地処理を施した後、該下地処理した面に
（ａ）エポキシ系樹脂１０〜８０重量％、（ｂ）金属フ
レーク３〜５０重量％、（ｃ）滑剤１〜４０重量％から
なる（但し、合計量は１００重量％を超えない。）耐食
性コーティング組成物に溶剤を加えて塗布する耐食性塗
膜の形成方法。
【０００８】以下、さらに本発明の実施の形態を詳述す
る。
【０００９】本発明で用いるエポキシ系樹脂は、ビスフ
ェノールＡ型、ビスフェノールＦ型、ノボラック型、お
よび脂肪族エポキシ樹脂等が使用でき、また硬化剤とし
ては、アミン類、ポリアミン類、ポリアミド類、酸無水
物、尿素、フェノール、メラミン、多硫化物硬化剤また
はこれらのアダクト、変性物等が使用できる。コーティ
ング組成物におけるエポキシ系樹脂の配合量は、１０〜
８０重量％が適当で、好ましくは４５〜６５重量％とす
ればよい。エポキシ系樹脂の配合量が１０重量％未満で
は、十分なコーティング（付着）性能が得られず、塗膜
が使用中に剥げたり金属フレークが脱落したりする。一
方、８０重量％を超える場合には、他の成分の配合量が
少なくなり滑り性や耐食性が十分でなくなる。
【００１０】金属フレークは、ステンレス、その他の耐
食性鉄合金、チタン、スズ、ニッケル、アルミニウム等
のフレーク等を用いることができる。これらの中でも特
にステンレス（ＳＵＳ３０４、ＳＵＳ３１６Ｌ、その他
のフェライト系、オーステナイト系、２相系ステンレス
等）フレークが特に好ましい。フレークの大きさはレー
ザー回折法による平均粒子径で５〜３００μｍ程度が好
ましく、特には３１〜６０μｍがさらに好ましい。平均
粒子径が５μｍ未満では、その製造自体が困難となりコ
ストアップとなるとともに、形状比（平均粒子径／平均
厚み）が小さいものしかできず、フレーク形状による保
護効果が弱くなる。一方３００μｍを超える場合には、
隠蔽力が低下するとともに、フレークの折損や塗膜から
の突き出し等が生じるため好ましくない。厚みについて
は平均厚み０．０１〜３μｍ程度が好ましい。
【００１１】ステンレスフレークを用いる場合には、含
有するケイ素量が０．４５〜０．８重量％であることが
好ましい。０．８重量％を超える場合には塗布後の外観
が極端に白みがかり、メタリック感がなくなり意匠的に
好ましくない。一方０．４５重量％未満では、粉末化・
フレーク化が困難となり、前記形状のフレークの製造が
困難である。
【００１２】金属フレークのコーティング組成物中の配
合量は、３〜５０重量％にすればよく、好ましくは５〜
３０重量％が適当である。金属フレークの配合量が３重
量％未満では、十分な隠蔽性がなく、耐食性・耐候性等
の効果に乏しい。一方、５０重量％を超えてもさらなる
耐食性・耐光性の改善はほとんどなく、相対的に樹脂の
量が少なくなるため、付着性の点で好ましくない。
【００１３】金属フレークの製造法は、公知の方法でよ
く特に限定されないが、アトマイズ法・粉砕法・回転円
盤法・回転電極法・キャビテーション法・メルトスピニ
ング法等により得られる粉末が原料として使用できる。
中でも好ましくはガスアトマイズ法、水アトマイズ法に
より得られる粉末が好適である。粉末のフレーク化は、
例えば湿式ボールミル、湿式アトライター、スタンプミ
ル等により摩砕あるいは粉砕処理することにより得られ
る。粉末・フレークは、必要に応じてスクリーン等で分
級して粒度を調整できる。
【００１４】本発明で使用する滑剤は、固体潤滑剤や潤
滑性能を有する樹脂が採用でき、フッ素系樹脂（ＰＴＦ
Ｅ、ＴＦＥ、ＰＦＡ、ＥＰＥ・ＦＥＰ等）、二硫化モリ
ブデン、二硫化タングステン、カーボン、グラファイ
ト、窒化硼素から選ばれる１種または２種以上をコーテ
ィング組成物中に１〜４０重量％含有させればよく、好
ましくは５〜３０重量％が適当である。１重量％未満で
は、潤滑性が乏しく十分な滑り性が得られない。一方４
０重量％を超えてもさらなる潤滑性能の向上はほとんど
なく、コストアップにつながるので好ましくない。
【００１５】本発明のコーティング組成物は、一般の溶
剤を用いて塗料化でき、例えばトルエン、キシレン等の
芳香族炭化水素、ミネラルターベン等の脂肪族炭化水
素、メチルエチルケトン、メチルイソブチルケトン等の
ケトン類、酢酸エチルエステル、酢酸ブチルエステル等
のエステル類、石油樹脂、インデンクマロン樹脂等の非
反応性希釈剤等、またこれらの混合物を使用することが
できる。溶剤の量は目的、用途等により適宜設定すれば
よいが、通常コーティング組成物１００重量部に対し、
１〜５００重量部加えればよい。
【００１６】上記塗料には、公知の添加物を加えること
もでき、例えば、有機ベントナイト、無水珪酸粉末等の
揺変性付与剤、金属石鹸、水添ヒマシ油、酸化エチレン
を主成分とする合成ワックス等の沈降防止剤、アルキッ
ド樹脂用ドライヤー、エポキシ樹脂用硬化促進剤等を添
加しても差し支えない。また、着色のために公知の顔料
を含ませることもできる。
【００１７】本発明のコーティング組成物を含む塗料
は、鉄系材料／その他の部品・部材の表面の少なくとも
一部以上、すなわち耐食性・耐候性が必要な部分に必要
量塗布して使用することができ、乾燥後の平均膜厚は好
ましくは５〜５００μｍ、より好ましくは１０〜１５０
μｍである。平均膜厚が５μｍ未満の場合は、十分な耐
食性が望められず、５００μｍを超えても過剰で、コス
トアップになる恐れがある上、何回もの重ね塗りが必要
になるため効率的でない。
【００１８】塗布の方法は、公知の方法が採用でき、は
け塗り、スプレー塗装、静電塗装、ロールコーター、バ
ーコーター、ドクターブレード等で塗布することができ
る。これらの方法以外にも単にコーティング組成物に鉄
系材料／その他の部品・部材を浸漬する等の方法でもよ
い。重ね塗り回数は特に限定されるものではないが、通
常２〜３回程度行えばよい。
【００１９】コーティング組成物の塗布後の乾燥は、エ
ポキシ系樹脂を十分に硬化させる目的から１５０〜２５
０℃程度の焼き付け乾燥を行うのがよい。
【００２０】本コーティング組成物を含む塗料は、その
まま鉄系材料の表面に塗布することもできるが、適当な
下地処理を行ってから塗布する方が、より効果的であ
る。例えば、溶融メッキ、溶射メッキ、電解メッキ、無
電解メッキ、蒸着（ＣＶＤ、ＰＶＤ）、化成処理、化学
処理から選ばれる１種または２種以上の下地処理を施せ
ばよい。特にはダクロタイジング、クロメート処理、リ
ン酸亜鉛処理、亜鉛メッキ等が好ましい。
【００２１】本発明のコーティング組成物は、鉄系材料
はもちろん、各種の構造部材、構造部品、機械材料、機
械部品、自動車部品、化学プラント等に適用することが
でき、例えばボルト、ナット、ビス、ワッシャー、ギヤ
ー、船舶、車両、橋梁、鉄塔、鉄道の切り替えポイント
・レール部品、各種実験装置、熱処理炉等に使用するこ
とができる。
【００２２】
【効果】１．本発明のコーティング組成物は、鉄系材料
への密着性が良好で、乾燥後の塗膜は８〜９Ｈの硬度を
有し、容易に剥離・脱落が起こらない。半永久的に紫外
線をカットし、耐候性試験では４０００時間経過後もチ
ョーキングが起こらない。
【００２３】２．本発明のコーティング組成物は滑材成
分があらかじめ含まれているので、使用前あるいは使用
中の潤滑剤の補給が不必要でメンテナンスフリーで経費
削減につながる。
【００２４】３．本発明のコーティング組成物は、耐酸
性、耐アルカリ性、耐薬品性に優れ、いかなる環境下に
おいても腐食や剥離等が起こらず、長期間安定して使用
できる。
【００２５】４．本発明のコーティング組成物は、溶剤
の配合量等により適度な粘度に調整できるので、複雑形
状の部品や凹凸屈曲等のある部材へも塗布可能である。
【００２６】以下に本発明の実施例について具体的に説
明する。
【００２７】
【実施例】［実施例１］下記の配合物をディスパーによ
り２０分間、分散混合させた。
【００２８】
エポキシ樹脂（含硬化剤） ６０重量部
ステンレスフレーク ２０重量部（東洋アルミニウム製
ＲＦＡ４０００）
四フッ化エチレン ８重量部（ヘキスト社製ホスタフロン
ＴＦ−９２０５）
添加剤（分散剤、沈降防止剤） ２重量部
溶剤（トルエン、ブチセロ、ＭＥＫ）１０重量部
エポキシ樹脂（油化シエル社エピコート＃８２８）２０
重量部とステンレスフレーク（ＳＵＳ３１６Ｌ、平均厚
み０．８μｍ、平均粒子径３５μｍ、含有ケイ素量０．
６重量％）２０重量部および四フッ化エチレン８重量部
とを予備混合後、続いてエポキシ硬化剤（大日本インキ
社ラッカーマイドＴＤ−９６６−Ｈ）４０重量部とブチ
セロソルブ、トルエン、ＭＥＫの混合溶剤を１０重量
部、分散剤と沈降防止剤それぞれ１重量部添加し、ディ
スパーにより２０分間分散混合することによりコーティ
ング組成物塗料を得た。
【００２９】［実施例２］実施例１において
エポキシ樹脂（含硬化剤） ５０重量部
ステンレスフレーク ３０重量部
とし、その他は実施例１と同様の配合・方法でコーティ
ング組成物塗料を得た。
【００３０】［実施例３］実施例１において
エポキシ樹脂（含硬化剤） ５０重量部
ステンレスフレーク ２０重量部
四フッ化エチレンに替えて、
二硫化モリブデン １８重量
とし、その他は実施例１と同様の配合・方法でコーティ
ング組成物塗料を得た。
【００３１】［実施例４］実施例１において
エポキシ樹脂（含硬化剤） ５３重量部
ステンレスフレーク ２０重量部（東洋アルミニウム製
ＲＦＡ４０００）
四フッ化エチレン １５重量部（ヘキスト社製ホスタフロン
ＴＦ−９２０５）
とし、その他は実施例１と同様の配合・方法でコーティ
ング組成物塗料を得た。
【００３２】［比較例１］下記の配合物をアトライター
で２時間処理して十分に分散したコーティング剤を得
た。
【００３３】
エポキシ樹脂（含硬化剤） ６０重量部
二硫化モリブデン ２０重量部
四フッ化エチレン ８重量部（ヘキスト社製ホスタフロン
ＴＦ−９２０５）
添加剤（分散剤、沈降防止剤） ２重量部
溶剤（トルエン、ブチセロ、ＭＥＫ）１０重量部
［比較例２］下記の配合物をアトライターで２時間処理
して十分に分散したコーティング剤を得た。
【００３４】
ポリアミド・イミド樹脂 ４０重量部
二硫化モリブデン ２０重量部
四フッ化エチレン ８重量部（ヘキスト社製ホスタフロン
ＴＦ−９２０５）
添加剤（分散剤、沈降防止剤） ２重量部
溶剤（Ｎ−メチル２ピロリドン DMF）３０重量部
［比較例３］下記の配合物をディスパーにより ２０分
間、分散混合させた。
【００３５】
エポキシ樹脂（含硬化剤） ６０重量部
ステンレスフレーク ２０重量部（東洋アルミニウム製
ＲＦＡ４０００）
四フッ化エチレン ０．５重量部（ヘキスト社製ホスタフ
ロンＴＦ−９２０５）
添加剤（分散剤、沈降防止剤） ２重量部
溶剤（トルエン、ブチセロ、ＭＥＫ）１７．５重量部
［比較例４］実施例１において、エポキシ樹脂の替わり
に
アルキド樹脂 ６０重量部
とし、その他は実施例１と同様にコーティング組成物塗
料を作製した。
【００３６】上記で得られたコーティング組成物塗料を
エアースプレー（口径１．２ｍｍ、圧４ｋｇ／ｃｍ2）
により鉄板（５０×１５０×０．３ｍｍ）および鉄製ボ
ルト・ナット（Ｍ２４）の表面に乾燥後膜厚み約２５μ
ｍとなるようスプレー塗装し、１８０℃で２０分焼き付
け乾燥を行った。冷却後再度乾燥後膜厚約２５μｍのス
プレー塗装を施し、２００℃２０分の焼き付け乾燥を行
った。各塗布板またはボルトを次の各試験に供して性能
評価を行った。
【００３７】・密着性（碁盤目試験）
ＪＩＳ Ｋ５４００−１９９０に基づいて実施した。
【００３８】評価Ａ：剥離、欠損部共になし。
【００３９】Ｂ：欠損部が１０％以内。
【００４０】Ｃ：欠損部が１０％を超える。
【００４１】・鉛筆硬度
鉛筆は、三菱鉛筆ユニを使用してＪＩＳ Ｋ５４００−
１９９０に基づいて実施した。
【００４２】Ａ：６Ｈ以上
Ｂ：４〜５Ｈ
Ｃ：３Ｈ以下
・耐摩耗性−摺動特性
面圧３０ｋｇｆ／ｃｍ2、摺速３ｍ／分（耐久試験）相
手材：試験材と同材、乾式で摺動距離の測定を行った。
【００４３】Ａ：摺動距離５０００ｍ以上
Ｂ：摺動距離１０００〜４９９９ｍ
Ｃ：摺動距離９９９ｍ以下
・ねじの嵌合性
ボルト・ナットを手指により嵌合し、回転させる。
【００４４】Ａ：引っかかりなくスムーズに回転する。
【００４５】Ｂ：引っかかりがあり、力を要す。
【００４６】Ｃ：手指で回転させることが困難である。
【００４７】・耐屈曲試験
４Ｔ折り曲げで、ＪＩＳ Ｋ５４００−１９９０に基づ
く。
【００４８】評価Ａ：折り曲げに耐える。（剥離・亀裂
が発生せず。）
Ｂ：塗膜表面に亀裂が発生。
【００４９】Ｃ：塗膜の剥離が発生。
【００５０】・塩水噴霧試験
連続３０００時間で、ＪＩＳ Ｋ５４００−１９９０に
基づいて行った。
【００５１】評価Ａ：異常なし
Ｂ：塗膜の変色はあるが、錆は見られず。
【００５２】Ｃ：錆・ふくれ・剥離が発生。
【００５３】・耐酸性
３重量％の塩酸水溶液に７２０時間浸漬して、ＪＩＳ
Ｋ５４００−１９９０に基づいて実施した。
【００５４】評価Ａ：異常なし
Ｂ：塗膜の変色はあるが、錆は見られず。
【００５５】Ｃ：錆・ふくれ・剥離が発生。
【００５６】・耐アルカリ性
２０重量％カセイソーダに４０００時間浸漬して、ＪＩ
Ｓ Ｋ５４００−１９９０に準拠して実施した。
【００５７】評価Ａ：異常なし
Ｂ：塗膜は変色しているが、ふくれ、割れ、剥離はな
し。
【００５８】Ｃ：塗膜が変色、一部ふくれ、割れ、剥離
等が発生。
【００５９】・キャス試験
ＪＩＳ ８６８１−１９８８に基づき、７２時間で評価
した。
【００６０】評価Ａ：レイティングナンバー９．８以上
Ｂ：レイティングナンバー９．３〜９．５
Ｃ：レイティングナンバー９以下
・亜硫酸ガス腐食
雰囲気温度４０℃、湿度１００％、２リットルＨ2Ｏ＋
２リットルＳＯ2を噴霧、２０サイクルで、ＤＩＮ５０
０１８に基づいて実施した。
【００６１】評価Ａ：異常なし
Ｂ：塗膜は変色しているが、ふくれ、割れ、剥離はな
し。
【００６２】Ｃ：腐食が発生。
【００６３】・促進耐候性
サンシャイン・カーボンアーク、１０００サイクルでＪ
ＩＳ Ｚ９１０５に基づいて実施した。
【００６４】Ａ：異常なし
Ｂ：やや変色しているが、ふくれ、割れ、剥離はなし。
【００６５】
Ｃ：完全に変色しており、商品価値低下。
【００６６】
【表１】
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating composition and a coating film excellent in weather resistance, chemical resistance, corrosion resistance, and lubricity, and a method for forming the coating film. 2. Description of the Related Art Conventionally, bolts, nuts, bridges, steel towers and the like are mainly made of a coating containing aluminum flakes or a surface treatment such as plating or chemical conversion for the purpose of corrosion resistance. However, conventional paints containing aluminum flakes did not have sufficient weather resistance, and after several years had to be repainted, the cost was enormous. In addition, when plating treatment is applied to bolts and nuts, slipperiness is not enough, not only extra labor and time is spent, but also performance is not sufficient such as screw threads are crushed or plating is peeled off Was. Further, lubrication is required for parts and members that require lubrication on a regular basis, which requires a lot of maintenance costs. Means for Solving the Problems The inventors of the present invention have made extensive and creative efforts, and as a result, have completed the present invention. That is, the present invention comprises the following composition, coating film and method. [0004] 1. (A) Epoxy resin (including curing agent)
A corrosion-resistant coating composition comprising 10 to 80% by weight, (b) 3 to 50% by weight of metal flakes, and (c) 1 to 40% by weight of a lubricant (the total amount does not exceed 100% by weight). [0005] 2. A paint obtained by adding a solvent to the corrosion-resistant coating composition according to the above 1. [0006] 3. One or more undercoating layers selected from hot-dip plating, thermal spray plating, electrolytic plating, electroless plating, vapor deposition (CVD, PVD), chemical treatment, and chemical treatment, and (a) 10 to 80 weight of epoxy resin %,
(B) metal flakes 3 to 50% by weight, (c) lubricants 1 to 4
0% by weight (however, the total amount does not exceed 100% by weight). A coating film comprising at least two layers of a corrosion-resistant coating layer. [0007] 4. Hot-dip plating, thermal spray plating, electrolytic plating, electroless plating, vapor deposition (CVD, P
One or two selected from VD), chemical treatment, and chemical treatment
After applying at least one kind of base treatment, the base-treated surface comprises (a) 10 to 80% by weight of an epoxy resin, (b) 3 to 50% by weight of metal flakes, and (c) 1 to 40% by weight of a lubricant. (However, the total amount does not exceed 100% by weight.) A method for forming a corrosion-resistant coating film in which a solvent is added to a corrosion-resistant coating composition and applied. Hereinafter, embodiments of the present invention will be described in detail. As the epoxy resin used in the present invention, bisphenol A type, bisphenol F type, novolak type, aliphatic epoxy resin and the like can be used. As the curing agent, amines, polyamines, polyamides, acid anhydrides and the like can be used. Substances, urea, phenol, melamine, polysulfide curing agents, or adducts or modified products thereof can be used. The amount of the epoxy resin in the coating composition is 10 to
80% by weight is appropriate, and preferably 45 to 65% by weight. If the amount of the epoxy resin is less than 10% by weight, sufficient coating (adhesion) performance cannot be obtained, and the coating film may peel off during use or metal flakes may fall off. On the other hand, if it exceeds 80% by weight, the amount of other components is reduced, and the slipperiness and corrosion resistance become insufficient. As metal flakes, flakes of stainless steel, other corrosion-resistant iron alloys, titanium, tin, nickel, aluminum and the like can be used. Among them, stainless steel (SUS304, SUS316L, other ferrite-based, austenitic, two-phase stainless steel, etc.) flakes are particularly preferable. The size of the flakes is preferably about 5 to 300 μm, more preferably 31 to 60 μm, as an average particle diameter determined by a laser diffraction method. If the average particle diameter is less than 5 μm, the production itself becomes difficult and the cost is increased, and only a small shape ratio (average particle diameter / average thickness) can be obtained, and the protective effect by the flake shape is weakened. On the other hand, if it exceeds 300 μm,
This is not preferable because the concealing power is reduced, the flakes are broken, and the flakes protrude from the coating film. The average thickness is preferably about 0.01 to 3 μm. When using stainless flakes, the silicon content is preferably 0.45 to 0.8% by weight. If it exceeds 0.8% by weight, the appearance after coating becomes extremely whitish, and the metallic feeling is lost, which is not preferable in terms of design. On the other hand, if it is less than 0.45% by weight,
It is difficult to make flakes, and it is difficult to produce flakes having the above-mentioned shape. The amount of the metal flakes in the coating composition may be 3 to 50% by weight, preferably 5 to 50% by weight.
30% by weight is suitable. If the amount of the metal flakes is less than 3% by weight, sufficient concealing properties are not obtained and effects such as corrosion resistance and weather resistance are poor. On the other hand, if it exceeds 50% by weight, there is almost no further improvement in the corrosion resistance and light resistance, and the amount of the resin is relatively small. The method of producing metal flakes is well known and is not particularly limited, but powder obtained by atomizing, pulverizing, rotating disk, rotating electrode, cavitation, melt spinning, etc. can be used as a raw material. .
Among them, powder obtained by a gas atomization method or a water atomization method is preferable. Flaking of powder
For example, it can be obtained by grinding or pulverizing with a wet ball mill, a wet attritor, a stamp mill or the like. The powder and flakes can be classified by a screen or the like as needed to adjust the particle size. As the lubricant used in the present invention, a solid lubricant or a resin having a lubricating performance can be adopted.
E, TFE, PFA, EPE / FEP, etc.), one or more selected from molybdenum disulfide, tungsten disulfide, carbon, graphite, boron nitride in the coating composition in an amount of 1 to 40% by weight. Good, preferably 5 to 30% by weight. If it is less than 1% by weight, lubricity is poor and sufficient lubricity cannot be obtained. While 4
If the amount exceeds 0% by weight, the lubricating performance is hardly further improved, which leads to an increase in cost. The coating composition of the present invention can be made into a coating using a general solvent, for example, aromatic hydrocarbons such as toluene and xylene, aliphatic hydrocarbons such as mineral turbene, ketones such as methyl ethyl ketone and methyl isobutyl ketone. And esters such as ethyl acetate and butyl acetate, non-reactive diluents such as petroleum resins and indene maron resins, and mixtures thereof. The amount of the solvent may be appropriately set depending on the purpose, application, etc., and usually, with respect to 100 parts by weight of the coating composition,
What is necessary is just to add 1-500 weight part. Known additives can also be added to the above-mentioned paints, for example, thixotropic agents such as organic bentonite and silicic anhydride powder, metal soap, hydrogenated castor oil, and synthetic wax containing ethylene oxide as a main component. , An alkyd resin dryer, a curing accelerator for epoxy resin, and the like. Further, a known pigment can be included for coloring. The paint containing the coating composition of the present invention can be used by applying a required amount to at least a part or more of the surface of an iron-based material / other part or member, that is, a part requiring corrosion resistance and weather resistance. The average film thickness after drying is preferably 5 to 500 μm, more preferably 10 to 150 μm.
μm. If the average film thickness is less than 5 μm, sufficient corrosion resistance cannot be expected, and if it exceeds 500 μm, it is excessive, which may increase the cost, and is inefficient because multiple recoating is required. A known coating method can be employed, and the coating can be performed by brushing, spray coating, electrostatic coating, a roll coater, a bar coater, a doctor blade, or the like. Other than these methods, a method of simply immersing the iron-based material / other parts / members in the coating composition may be used. Although the number of times of recoating is not particularly limited, it may be usually performed about two to three times. The drying after the application of the coating composition is carried out at 150 to 25 for the purpose of sufficiently curing the epoxy resin.
Baking and drying at about 0 ° C. is preferred. The paint containing the present coating composition can be applied to the surface of an iron-based material as it is, but it is more effective to apply it after performing an appropriate base treatment. For example, at least one kind of undercoating selected from hot-dip plating, thermal spray plating, electrolytic plating, electroless plating, vapor deposition (CVD, PVD), chemical treatment, and chemical treatment may be applied. In particular, dacrotizing, chromate treatment, zinc phosphate treatment, galvanizing, and the like are preferable. The coating composition of the present invention can be applied not only to iron-based materials but also to various structural members, structural parts, machine materials, machine parts, automobile parts, chemical plants and the like. For example, bolts, nuts, screws , Washers, gears, ships, vehicles, bridges, steel towers, rail switching points and rail parts, various experimental devices, heat treatment furnaces, etc. [Effects] 1. The coating composition of the present invention has good adhesion to iron-based materials, and the dried coating film has a hardness of 8 to 9H, and does not easily peel or fall off. UV rays are cut off semipermanently, and no chalking occurs even after 4000 hours in the weather resistance test. 2. Since the coating composition of the present invention contains a lubricant component in advance, it is not necessary to replenish the lubricant before or during use, which is maintenance-free and leads to cost reduction. 3. The coating composition of the present invention is excellent in acid resistance, alkali resistance and chemical resistance, does not corrode or peel off under any environment, and can be used stably for a long period of time. 4. Since the coating composition of the present invention can be adjusted to an appropriate viscosity by adjusting the amount of the solvent to be mixed, it can be applied to parts having complicated shapes and members having unevenness and curvature. Hereinafter, embodiments of the present invention will be specifically described. EXAMPLES Example 1 The following ingredients were dispersed and mixed by a disper for 20 minutes. Epoxy resin (containing hardener) 60 parts by weight Stainless flake 20 parts by weight (RFA4000 manufactured by Toyo Aluminum) 8 parts by weight of ethylene tetrafluoride (Hostaflon TF-9205 manufactured by Hoechst) Additives (dispersant, anti-settling agent) 2 parts by weight solvent (toluene, butycelo, MEK) 10 parts by weight Epoxy resin (Yuika Ciel Epicoat # 828) 20
Parts by weight and stainless flakes (SUS316L, average thickness 0.8 μm, average particle diameter 35 μm, silicon content 0.
20 parts by weight) and 8 parts by weight of ethylene tetrafluoride, and then 40 parts by weight of an epoxy curing agent (Lacqueramide TD-966-H, Dainippon Ink Co., Ltd.), butycellosolve, toluene and MEK. 10 parts by weight of a mixed solvent, 1 part by weight of a dispersant and 1 part by weight of an anti-settling agent were added, and the mixture was dispersed and mixed by a disper for 20 minutes to obtain a coating composition coating material. Example 2 A coating composition coating material was obtained in the same manner as in Example 1 except that 50 parts by weight of epoxy resin (containing hardener) and 30 parts by weight of stainless flake were used. Example 3 In Example 1, molybdenum disulfide was replaced by 18 parts by weight instead of 50 parts by weight of epoxy resin (containing hardener), 20 parts by weight of stainless flake and 20 parts by weight of ethylene tetrafluoride. A coating composition paint was obtained by mixing and method. Example 4 In Example 1, 53 parts by weight of an epoxy resin (containing a curing agent) 20 parts by weight of stainless flake (RFA4000 manufactured by Toyo Aluminum) 15 parts by weight of ethylene tetrafluoride (Hostaflon TF-9205 manufactured by Hoechst) A coating composition paint was obtained by the same composition and method as in Example 1 except for the above. [Comparative Example 1] The following formulation was treated with an attritor for 2 hours to obtain a sufficiently dispersed coating agent. Epoxy resin (containing curing agent) 60 parts by weight Molybdenum disulfide 20 parts by weight Ethylene tetrafluoride 8 parts by weight (Hostaflon TF-9205 manufactured by Hoechst) Additives (dispersant, anti-settling agent) 2 parts by weight Solvent ( [Comparative Example 2] The following formulation was treated with an attritor for 2 hours to obtain a sufficiently dispersed coating agent. Polyamide / imide resin 40 parts by weight Molybdenum disulfide 20 parts by weight Ethylene tetrafluoride 8 parts by weight (Hostaflon TF-9205 manufactured by Hoechst) Additives (dispersant, anti-settling agent) 2 parts by weight Solvent (N-methyl) (2 Pyrrolidone DMF) 30 parts by weight [Comparative Example 3] The following components were dispersed and mixed by a disper for 20 minutes. Epoxy resin (containing curing agent) 60 parts by weight Stainless flake 20 parts by weight (RFA4000 manufactured by Toyo Aluminum) 0.5 parts by weight of ethylene tetrafluoride (Hostaflon TF-9205 manufactured by Hoechst) Additives (dispersant, sedimentation) 2 parts by weight Solvent (toluene, butycelo, MEK) 17.5 parts by weight [Comparative Example 4] In Example 1, 60 parts by weight of alkyd resin was used instead of epoxy resin, and the other coatings were the same as in Example 1. A composition paint was prepared. The coating composition obtained above is sprayed with an air spray (diameter 1.2 mm, pressure 4 kg / cm 2 ).
After drying on the surface of iron plate (50 × 150 × 0.3 mm) and iron bolts and nuts (M24), the film thickness is about 25μ.
m, and baked and dried at 180 ° C. for 20 minutes. After cooling, it was dried again, spray-coated with a thickness of about 25 μm, and baked and dried at 200 ° C. for 20 minutes. Each coated plate or bolt was subjected to the following tests to evaluate the performance. Adhesion (cross cut test) The test was carried out based on JIS K5400-1990. Evaluation A: Neither peeling nor defective portion was observed. B: Defective portion is within 10%. C: Deficit exceeds 10%. Pencil hardness Pencil hardness is JIS K5400- using Mitsubishi Pencil Uni.
1990. A: 6H or more B: 4-5H C: 3H or less Abrasion resistance-Sliding characteristics Surface pressure 30 kgf / cm 2 , Sliding speed 3 m / min (durability test) Opponent: Same material as test material, dry type Was used to measure the sliding distance. A: Sliding distance of 5,000 m or more B: Sliding distance of 1,000 to 4999 m C: Sliding distance of 999 m or less Fitting bolts and nuts are fitted by hand and rotated. A: It rotates smoothly without being caught. B: There is a catch and a force is required. C: It is difficult to rotate with fingers. Bending test 4T bending, based on JIS K5400-1990. Evaluation A: Withstands bending. (No peeling / cracking occurred) B: Cracks occurred on the coating film surface. C: Peeling of the coating film occurred. The salt spray test was performed for 3,000 continuous hours in accordance with JIS K5400-1990. Evaluation A: No abnormality B: Discoloration of the coating film, but no rust was observed. C: Rust, blistering, and peeling occurred. Immersing in a 3% by weight acid-resistant hydrochloric acid aqueous solution for 720 hours
Performed based on K5400-1990. Evaluation A: No abnormality B: Discoloration of the coating film, but no rust was observed. C: Rust, blistering and peeling occurred. Immersion in alkaline soda 20% by weight sodium hydroxide for 4000 hours
SK5400-1990. Evaluation A: No abnormality B: Discoloration of the coating film, but no blistering, cracking or peeling. C: Discoloration, partial blistering, cracking, peeling, etc. of the coating film occurred. Cass test: Evaluated in 72 hours based on JIS 8681-1988. Evaluation A: Rating number 9.8 or more B: Rating number 9.3 to 9.5 C: Rating number 9 or less ・ Sulfurous acid gas corrosion atmosphere temperature 40 ° C., humidity 100%, 2 liter H 2 O +
Spray 2 liter SO 2 , 20 cycles, DIN 50
018. Evaluation A: No abnormality B: Discoloration of the coating film, but no blistering, cracking or peeling. C: Corrosion occurred. Accelerated weathering sunshine carbon arc, J at 1000 cycles
Performed based on IS Z9105. A: No abnormality B: Discolored slightly, but no blistering, cracking or peeling. C: Completely discolored, resulting in lower commercial value. [Table 1]
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０８Ｌ 63/00 Ｃ０８Ｌ 63/00 Ｃ Ｃ０９Ｄ 163/00 Ｃ０９Ｄ 163/00 (56)参考文献 特開 平10−95953（ＪＰ，Ａ) 特開 昭61−228073（ＪＰ，Ａ) 特開 平９−234820（ＪＰ，Ａ) 特開 平８−239624（ＪＰ，Ａ) 特開 平７−224247（ＪＰ，Ａ) 特開 平８−28535（ＪＰ，Ａ) 特開 平６−193623（ＪＰ，Ａ) 特開 平３−150301（ＪＰ，Ａ) 特開 平４−25588（ＪＰ，Ａ) 特開 昭53−77954（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C09D 1/00 - 201/10 B05D 7/24 B05D 5/00 Continuation of the front page (51) Int.Cl. 7 Identification code FI C08L 63/00 C08L 63/00 C C09D 163/00 C09D 163/00 (56) References JP-A-10-95953 (JP, A) JP JP-A-61-228073 (JP, A) JP-A-9-234820 (JP, A) JP-A-8-239624 (JP, A) JP-A-7-224247 (JP, A) JP-A-8-28535 (JP JP-A-6-193623 (JP, A) JP-A-3-150301 (JP, A) JP-A-4-25588 (JP, A) JP-A-53-77954 (JP, A) (58) Field surveyed (Int.Cl. 7 , DB name) C09D 1/00-201/10 B05D 7/24 B05D 5/00
Claims (1)
れる塗膜であって、溶融メッキ、溶射メッキ、電解メッ
キ、無電解メッキ、蒸着（ＣＶＤ、ＰＶＤ）、化成処
理、化学処理から選ばれる１種または２種以上の下地処
理層と、（ａ）エポキシ系樹脂（硬化剤含む）１０〜８
０重量％、（ｂ）金属フレーク３〜５０重量％、（ｃ）
フッ素系樹脂（ＰＴＦＥ、ＴＦＥ、ＰＦＡ、ＥＰＥ・Ｆ
ＥＰ等）、二硫化モリブデン、二硫化タングステン、窒
化硼素から選ばれる１種または２種以上の滑剤１〜４０
重量％からなる（但し、合計量は１００重量％を超えな
い。）耐食性コーティング組成物層の少なくとも２層構
造からなり、かつ該耐食性コーティング組成物層の平均
膜厚が１０〜１５０μｍである塗膜。(57) [Claim 1] A coating film formed on a part / member requiring lubrication , which is hot-dip plating, thermal spray plating, electrolytic plating, electroless plating, vapor deposition (CVD, PVD), one or more underlayers selected from a chemical treatment and a chemical treatment, and (a) an epoxy resin (including a curing agent)
0% by weight, (b) 3 to 50% by weight of metal flakes, (c)
Fluorine-based resin (PTFE, TFE, PFA, EPE-F
EP), one or more lubricants selected from molybdenum disulfide, tungsten disulfide, and boron nitride
% By weight (however, the total amount does not exceed 100% by weight). A coating film comprising at least a two-layer structure of a corrosion-resistant coating composition layer and having an average film thickness of 10 to 150 μm. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33109898A JP3504872B2 (en) | 1998-11-20 | 1998-11-20 | Coating film and method of forming coating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33109898A JP3504872B2 (en) | 1998-11-20 | 1998-11-20 | Coating film and method of forming coating film |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003100557A Division JP2003336005A (en) | 2003-04-03 | 2003-04-03 | Corrosion-resistant coating composition, coating material and its coating film |
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| Publication Number | Publication Date |
|---|---|
| JP2000154338A JP2000154338A (en) | 2000-06-06 |
| JP3504872B2 true JP3504872B2 (en) | 2004-03-08 |
Family
ID=18239843
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| Country | Link |
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| JP (1) | JP3504872B2 (en) |
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|---|---|---|---|---|
| US8021579B2 (en) | 2004-10-08 | 2011-09-20 | Shin-Etsu Polymer Co., Ltd. | Conductive composition and production method thereof, antistatic coating material, antistatic coating, antistatic film, optical filter, and optical information recording medium, and capacitors and production method thereof |
| US8035952B2 (en) | 2004-10-08 | 2011-10-11 | Shin-Etsu Polymer Co., Ltd. | Conductive composition and production method thereof, antistatic coating material, antistatic coating, antistatic film, optical filter, and optical information recording medium, and capacitors and production method thereof |
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| JP2000154338A (en) | 2000-06-06 |
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