JP4673412B2 - 無電解メッキ形成材料、触媒付着用塗布液、無電解メッキ形成方法、およびメッキ方法 - Google Patents
無電解メッキ形成材料、触媒付着用塗布液、無電解メッキ形成方法、およびメッキ方法 Download PDFInfo
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Description
本発明の無電解メッキ形成材料は、好ましくは、前記親水性モノマーが、水酸基を有する(メタ)アクリレート類又はN−メチロール(メタ)アクリルアミドであることを特徴とするものである。
本発明の無電解メッキ形成材料は、好ましくは、前記疎水性モノマーが、アルキル(メタ)アクリレートであることを特徴とするものである。
を付着させる役割を有するものである。本発明では、このような触媒付着層として、親水性モノマーと疎水性モノマーとから構成されてなり疎水性モノマーの割合が50〜90mol%である親水性(メタ)アクリル系樹脂を含むものを用いる。
架橋を進行させるタイミングは、特に限定されないが、メッキ層の割れを防止するためには、触媒付着層に触媒を付着した後、電解メッキを行う前であることが好ましい。例えば無電解メッキの直前や電解メッキの直前に行なうことができる。
冷却管および攪拌装置を備えた反応容器中に、表1の割合(単位は「mol」)で親水性モノマーと疎水性モノマーとを混入し、さらに希釈溶媒として酢酸エチルを加えて反応モノマー濃度を50%とした。次いで、窒素ガスで反応容器内を充分に置換した後、オイルバスにて反応溶液の温度を60〜90℃に加熱した。加熱後、モノマー量に対して0.15%の重合開始剤を添加し、反応を6〜8時間継続させて共重合させ、親水性(メタ)アクリル系樹脂a〜u(固形分50%)を得た。なお、表1のHEMAは2−ヒドロキシルエチルメタクリレート、N−MAMはN−メチロールアクリルアミド、AAはアクリル酸、MMAはメチルメタクリレート、MAはメチルアクリレート、Stはスチレンの各モノマーを表す。
<実施例1の無電解メッキ形成材料の作製>
厚み100μmのポリエステルフィルム(ルミラーT60:東レ社)の一方の面に、樹脂aを溶媒で希釈してなる触媒付着層塗布液Aを塗布し、90℃で3分加熱し、厚み1μmの触媒付着層を形成し、実施例1の無電解メッキ形成材料を得た。
樹脂aを樹脂b〜kに変更した以外は実施例1と同様にして、実施例2〜11の無電解メッキ形成材料を得た。
樹脂aを樹脂l〜uに変更した以外は実施例1と同様にして、比較例1〜10の無電解メッキ形成材料を得た。
触媒付着層塗布液Aの樹脂aを、それぞれ下記の樹脂に変更した以外は実施例1と同様にして、実施例12、13の無電解メッキ形成材料を得た。
<<実施例12の樹脂>>
親水性(メタ)アクリル系樹脂
(ケミトリーL-40M:綜研化学社、櫛形樹脂、疎水性モノマーの割合86mol%)(枝成分:N−MAMおよびHEMA/何れも親水性モノマー、幹成分:MMA/疎水性モノマー)
<<実施例13の樹脂>>
親水性(メタ)アクリル系樹脂
(ケミトリーL-20:綜研化学社、櫛形樹脂、疎水性モノマーの割合86mol%)(枝成分:HEMA/親水性モノマー、幹成分:MMA/疎水性モノマー)
厚み100μmのポリエステルフィルム(ルミラーT60:東レ社)の一方の面に、下記処方の硬化層塗布液を塗布し、100℃で30秒間乾燥させ、厚み1μmの硬化層を形成した。硬化層形成後直ちに硬化層上に下記処方の触媒付着層塗布液Bを塗布し、110℃で5分間乾燥させ、厚み1.5μmの触媒付着層を形成し、比較例11の無電解メッキ形成材料を得た。
・ポリエステル樹脂 10部
(バイロン200:東洋紡社、固形分100%)
・イソシアネート系化合物 1部
(タケネートD160N:三井化学ポリウレタン社)
・メチルエチルケトン 40部
・トルエン 40部
・アノン 10部
・ポリビニルアルコール 1部
(ゴーセノールNH20:日本合成化学工業社)
・水 9部
比較例11の硬化層塗布液のポリエステル樹脂を、同じくポリエステル樹脂(エリーテルUE3350:ユニチカ社、固形分100%)に変更し、イソシアネート系化合物の添加量を14部に変更した以外は比較例11と同様にして比較例12の無電解メッキ形成材料を得た。
(2)触媒付与:触媒浴としてパラジウムおよびスズ混合のコロイド溶液を用い、感受性化処理を60秒、活性化処理を30秒順次行った。
(3)無電解メッキ:下記組成の無電解メッキ浴を用い、浴温60℃、浸漬時間15分の条件で無電解メッキを行った。
<<無電解メッキ浴>>
・硫酸銅五水和物 0.03M
・EDTA四水和物 0.24M
・ホルマリン 0.20M
・ジピリジル 10ppm
・界面活性剤 100ppm
(4)電解メッキ:電解メッキ浴として硫酸銅メッキ浴(キューブライトTHプロセス:荏原ユージライト社)を用い、約30μmの厚みとなるまで電解メッキを行った。
メッキが均一に形成されているかについて目視で評価を行った。ムラなく均一にメッキが形成されているものを「○」、ムラがあり不均一なものを「×」とした。
メッキ面に隙間間隔1mmの桝目が100個できるように切れ目を入れ、切れ目を入れた箇所にセロハン粘着テープを貼って剥がした後に、膜(電解メッキ、無電解メッキ、触媒付着層、硬化層)が非導電性基材に接着している面積割合を目視で観察した。
純水に10分間浸漬した後、取り出して十分に乾燥させ、浸漬前からの重量変化を測定した。その結果、触媒付着層が溶出せず重量変化がないものを「○」、触媒付着層の重量の20%以上が溶出したものを「×」とした。
無電解メッキを施した直後のメッキ層の色を基材側から観察した。その結果、メッキ層の色が鮮やかな銅色であったものを「○」、黒ずんでいたものを「×」とした。
実施例1〜13の無電解メッキ形成材料について、無電解メッキを形成した後に130℃で5分間、追加熱処理を行い、その後に電解メッキを形成した。電解メッキ形成後さらにレジスト膜をメッキ面に塗布し、酸エッチングによりパターンを形成後、レジスト膜をアルカリで剥離した。その後、メッキパターンがエッチングで除去されて露出した触媒付着層の表面抵抗率(JIS K7194:1994)を測定した。
上記のように追加熱処理後に電解メッキが形成された実施例1〜13の無電解メッキ形成材料の電解メッキ面表面のひび割れを観察した。その結果、自己架橋が進行した実施例10〜12の無電解メッキ形成材料は殆どひび割れることなく、自己架橋を起こさない実施例1〜9、13の無電解メッキ形成材料に対する優位性が確認された。
実施例1〜13の無電解メッキ形成材料の触媒付着層の厚み(1.0μm)を、0.7μm、0.5μm、0.2μm、0.05μmに変更したものを作製し、実施例1〜13と同じ条件で無電解メッキを行った後、追加熱処理をせずに電解メッキを行い、電解メッキ面のひび割れを観察した。その結果、触媒付着層の厚みが薄くなるほどひび割れを起こしにくいことが確認された。
Claims (12)
- 非導電性基材上に触媒付着層を有する無電解メッキ形成材料において、前記触媒付着層が、親水性モノマーと疎水性モノマーとから構成されてなり疎水性モノマーの割合が50〜90mol%である親水性(メタ)アクリル系樹脂を含むことを特徴とする無電解メッキ形成材料。
- 前記親水性モノマーおよび前記疎水性モノマーの少なくとも一方が、自己架橋性モノマーであることを特徴とする請求項1記載の無電解メッキ形成材料。
- 前記親水性モノマーが、水酸基を有する(メタ)アクリレート類又はN−メチロール(メタ)アクリルアミドであることを特徴とする請求項1記載の無電解メッキ形成材料。
- 前記疎水性モノマーが、アルキル(メタ)アクリレートであることを特徴とする請求項1記載の無電解メッキ形成材料。
- 前記親水性(メタ)アクリル系樹脂が、櫛形樹脂であることを特徴とする請求項1記載の無電解メッキ形成材料。
- 前記触媒付着層は、前記親水性(メタ)アクリル系樹脂を、当該触媒付着層を構成する全樹脂の50重量%以上含むことを特徴とする請求項1記載の無電解メッキ形成材料。
- 非導電性基材に無電解メッキ用触媒を付着させるための触媒付着用塗布液であって、親水性モノマーと疎水性モノマーとから構成されてなり疎水性モノマーの割合が50〜90mol%である親水性(メタ)アクリル系樹脂を含むことを特徴とする触媒付着用塗布液。
- 請求項1から6何れか1項記載の無電解メッキ形成材料の触媒付着層に触媒を付着させた後、無電解メッキを行うことを特徴とする無電解メッキの形成方法。
- 非導電性基材上に触媒付着層が形成されてなる無電解メッキ形成材料の、触媒付着層に触媒を付着するステップ(1)と、触媒を付着した無電解メッキ形成材料をメッキすべき金属化合物を含む無電解メッキ液に浸漬し、無電解メッキを行うステップ(2)と、無電解メッキが形成された無電解メッキ形成材料を電解メッキ浴に浸漬し通電して電解メッキを行なうステップ(3)とを含む非導電性基材のメッキ方法において、前記無電解メッキ形成材料として、請求項1から6何れか1項記載の無電解メッキ形成材料を用いたことを特徴とするメッキ方法。
- 非導電性基材上に触媒付着層が形成されてなる無電解メッキ形成材料の、触媒付着層に触媒を付着するステップ(1)と、触媒を付着した無電解メッキ形成材料をメッキすべき金属化合物を含む無電解メッキ液に浸漬し、無電解メッキを行うステップ(2)と、無電解メッキが形成された無電解メッキ形成材料を電解メッキ浴に浸漬し通電して電解メッキを行なうステップ(3)とを含む非導電性基材のメッキ方法において、前記無電解メッキ材料として、非導電性基材の表面に請求項7項記載の触媒付着用塗布液を塗布することにより触媒付着層を形成した無電解メッキ形成材料を用いたことを特徴とするメッキ方法。
- 前記無電解メッキ形成材料を加熱し、親水性(メタ)アクリル系樹脂の架橋を進行させるステップ(4)を含むことを特徴とする請求項9または10に記載のメッキ方法。
- 前記ステップ(4)は、ステップ(1)の後であってステップ(3)の前に行なうことを特徴とする請求項11に記載のメッキ方法。
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US20030138635A1 (en) * | 2000-07-11 | 2003-07-24 | Naoya Haruta | Multi-layer application film and method of laminating the same |
JP2002220677A (ja) | 2001-01-26 | 2002-08-09 | Dainippon Printing Co Ltd | 金属膜を有する部材 |
JP2006080942A (ja) * | 2004-09-10 | 2006-03-23 | Seiko Epson Corp | 画像処理装置、画像処理プログラム、画像処理方法及び撮像装置 |
KR101310588B1 (ko) * | 2006-03-23 | 2013-09-23 | 가부시키가이샤 니혼효멘쇼리겐큐쇼 | 무전해 도금 형성재료, 및 이것을 사용한 무전해 도금의 형성방법 |
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JPS5931860A (ja) * | 1982-07-14 | 1984-02-21 | エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン | アクリル樹脂またはメタクリル樹脂でつくられた表面上に金属鏡を設ける方法 |
JPS62146278A (ja) * | 1985-12-19 | 1987-06-30 | Sumitomo Bakelite Co Ltd | 紫外線硬化型メツキ下地剤 |
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JP2006066180A (ja) * | 2004-08-26 | 2006-03-09 | Fuji Photo Film Co Ltd | 導電膜の製造方法及び導電膜 |
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WO2008096670A1 (ja) | 2008-08-14 |
TW200905012A (en) | 2009-02-01 |
KR101436665B1 (ko) | 2014-09-01 |
KR20090117773A (ko) | 2009-11-12 |
JPWO2008096670A1 (ja) | 2010-05-20 |
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