JP2006182966A - 顔料分散体及び塗料 - Google Patents
顔料分散体及び塗料 Download PDFInfo
- Publication number
- JP2006182966A JP2006182966A JP2004380017A JP2004380017A JP2006182966A JP 2006182966 A JP2006182966 A JP 2006182966A JP 2004380017 A JP2004380017 A JP 2004380017A JP 2004380017 A JP2004380017 A JP 2004380017A JP 2006182966 A JP2006182966 A JP 2006182966A
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- Prior art keywords
- pigment
- coating
- paint
- average particle
- particle size
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- JOUDBUYBGJYFFP-FOCLMDBBSA-N thioindigo Chemical compound S\1C2=CC=CC=C2C(=O)C/1=C1/C(=O)C2=CC=CC=C2S1 JOUDBUYBGJYFFP-FOCLMDBBSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
【解決手段】 一次平均粒子径が200nm以下の着色顔料またはストラクチャーの平均粒子径が100nm以下のカーボンブラックからなる第1の顔料と、一次平均粒子径が55nm以下の硫酸バリウムからなる第2の顔料とを、一方の顔料の(酸量−塩基量)の値が正で、他方の顔料の(酸量−塩基量)の値が負となるように組み合わせ、顔料分散剤の存在下、第1の顔料と第2の顔料を媒体中に同時に分散させたことを特徴としている。
【選択図】 図1
Description
第1の顔料として、以下のものを用いた。
・カーボンブラックB:カーボンブラック、商品名「デクサカーボンFW−200P」、デグサ社製、ストラクチャーの平均粒子径39nm
・キナクリドンマゼンタ:赤色有機顔料、商品名「シンカシャマゼンタBRT−343D」、チバガイギー社製、一次平均粒子径70nm
・ポリ塩素化銅フタロシアニン:緑色有機顔料、商品名「リオノールグリーン6YKP−N」、東洋インキ社製、一次平均粒子径90nm
・フタロシアニン:青色有機顔料、商品名「シャニンブルーG−314NF」、山陽色素社製、一次平均粒子径80nm
〔酸量及び塩基量の測定〕
上記の各第1の顔料について、酸量及び塩基量を測定した。酸量の測定は、上記の方法により、塩基としてジメチルエチルアミン(DMEA)を用いて行った。また、塩基量の測定は、上記のように、酸として酢酸を用いて行った。酸量及び塩基量、並びに(酸量−塩基量)の測定結果を表1に示す。
硫酸バリウムとして、以下に示す硫酸バリウムを用いた。
・BF−21:堺化学社製硫酸バリウム、一次平均粒子径50nm
・BF−40:堺化学社製硫酸バリウム、一次平均粒子径10nm
・BF−1:堺化学社製硫酸バリウム、一次平均粒子径50nm
・BF−10:堺化学社製硫酸バリウム、一次平均粒子径60nm
上記と同様にして、上記各硫酸バリウムの酸量及び塩基量を測定し、(酸量−塩基量)を求めた。測定結果を表2に示す。
第1の顔料と第2の顔料を、表3及び表4に示すように組み合わせて混合し顔料分散体を調製した。第1の顔料の分散液と第2の顔料の混合割合は、それぞれの分散液における顔料(固形分)が、表3及び表4にそれぞれ示すような比率となるようにした。溶剤としてはキシレンを用い、第1の顔料と第2の顔料の合計が、16重量%となるように調整した。顔料分散剤としては、アミン系顔料分散剤(商品名「BYK−182」、ビッグケミー社製)を用いた。顔料分散剤は、第1の顔料がカーボンブラックである場合には第1の顔料100重量部に対し80重量部となるように添加し、第1の顔料が着色顔料である場合には第1の顔料100重量部に対し30重量部となるように用いた。また、ここでは、分散樹脂も併せて用いた。分散樹脂の添加量は、顔料分散体中の固形分が20重量%となるように添加した。
実施例1の配合で、第1の顔料と第2の顔料をSGミルを用いて撹拌混合する際の撹拌混合時間を2時間〜9時間の範囲で変化させ、得られる顔料分散体の平均粒子径を測定し、撹拌混合時間と到達粒子径との関係について検討した。また、比較例3に相当する配合、すなわち第2の顔料を添加せずに第1の顔料のみを分散させた場合についても同様に検討し、その結果を表5及び図1に示した。
表7に示すように、第1の顔料と第2の顔料を、混合割合を変えて混合し、得られた顔料分散体の平均粒子径を測定した。結果を表7に示す。
〔ソリッド塗料(ベース塗料)の調製〕
アクリル樹脂とメラミン樹脂を重量比で7:3の割合で顔料分散体に添加した後、キシレン及び酢酸ブチルの混合溶媒(重量比5:5)で希釈し、不揮発分(NV)35重量%とし、ソリッド塗料(ベース塗料)を調製した。アクリル樹脂としては、商品名「ダイヤナールHR」(三菱レーヨン社製、数平均分子量=5100、重量平均分子量=11500、酸価=13.5、水酸基価=75)を用い、メラミン樹脂としては、商品名「ユーバン20」(三井化学社製、数平均分子量=1300、重量平均分子量=3500、ブチル化)を用いた。
ガラス板の上に、上記のベース塗料(ソリッド塗料)を膜厚25μmとなるように手拭きスプレー塗装した。10分間セッティングした後、ベース塗膜(ソリッド塗膜)の上にクリヤ塗料を膜厚35μmとなるように塗装した。クリヤ塗料としては、商品名「MAC O−1810クリヤ」(日本ペイント社)を用いた。クリヤ塗料を塗装し、10分間セッティングした後、140℃で30分間加熱し、積層塗膜を硬化させた。
表11及び表12に示す第1の顔料と第2の顔料を混合した顔料分散体を用いる以外は、上記と同様にしてベース塗料(ソリッド塗料)を調製した。
上記のベース塗料(ソリッド塗料)を用いて、以下のようにして3コート1ベークで積層塗膜を形成した。
上記のベース塗料(ソリッド塗料)と同様のアクリル樹脂及びメラミン樹脂を同様の割合で顔料分散体に配合し、さらにアルミフレークを添加して、メタリック塗料を調製した。なお、上記と同様にしてキシレン及び酢酸ブチルの混合溶媒を用いて、不揮発分(NV)が35重量%となるように調製した。なお、アルミフレークとしては、東洋アルミ社製、商品名「7670NS」を用いた。
表13〜表15に示す塗料を用いて、上記と同様にして2コート1ベーク塗装を行い、積層塗膜を形成した。
上記と同様にして、表16に示すメタリック塗料を用い、3コート1ベーク塗装を行った。
Claims (10)
- 一次平均粒子径が200nm以下の着色顔料またはストラクチャーの平均粒子径が100nm以下のカーボンブラックからなる第1の顔料と、一次平均粒子径が55nm以下の硫酸バリウムからなる第2の顔料とを、一方の顔料の(酸量−塩基量)の値が正で、他方の顔料の(酸量−塩基量)の値が負となるように組み合わせ、顔料分散剤の存在下、第1の顔料と第2の顔料を媒体中に同時に分散させたことを特徴とする顔料分散体。
- 前記第1の顔料と第2の顔料の重量配合比が、2:8〜8:2であることを特徴とする請求項1に記載の顔料分散体。
- 顔料分散体の平均粒子径が、第1の顔料の一次平均粒子径(カーボンの場合はストラクチャーの平均粒子径)の5倍以下であることを特徴とする請求項1または2に記載の顔料分散体。
- 前記顔料分散剤が、ノニオン系またはアニオン系の顔料分散剤であることを特徴とする請求項1〜3のいずれか1項に記載の顔料分散体。
- 前記媒体が、有機溶媒、脱イオン水、または脱イオン水と溶媒であることを特徴とする請求項1〜4のいずれか1項に記載の顔料分散体。
- 請求項1〜5のいずれか1項に記載の顔料分散体と、バインダーとを含むことを特徴とするソリッド塗料。
- 請求項1〜5のいずれか1項に記載の顔料分散体と、鱗片状光輝性顔料と、バインダーとを含むことを特徴とするメタリック塗料。
- 請求項6または7に記載の塗料を被塗物に塗布し、ソリッド塗膜またはメタリック塗膜を形成する工程と、
前記ソリッド塗膜またはメタリック塗膜の上にクリヤ塗料をウェットオンウェットで塗布し、積層塗膜を形成する工程と、
前記積層塗膜を同時に焼き付け硬化する工程とを備えることを特徴とする塗膜形成方法。 - 被塗物に中塗り塗料を塗布し、中塗り塗膜を形成する工程と、
前記中塗り塗膜の上に、請求項6または7に記載の塗料をウェットオンウェットで塗布し、ソリッド塗膜またはメタリック塗膜を形成した後、その上にクリヤ塗料をウェットオンウェットで塗布し、積層塗膜を形成する工程と、
前記積層塗膜を同時に焼き付け硬化する工程とを備えることを特徴とする塗膜形成方法。 - 請求項8または9に記載の方法により形成されたことを特徴とする塗装物。
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GB2421954B (en) | 2007-03-14 |
CA2531470C (en) | 2011-05-17 |
CA2531470A1 (en) | 2006-06-28 |
CN1796471B (zh) | 2011-09-28 |
GB0526081D0 (en) | 2006-02-01 |
US7780778B2 (en) | 2010-08-24 |
JP4895502B2 (ja) | 2012-03-14 |
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US20060141162A1 (en) | 2006-06-29 |
CN1796471A (zh) | 2006-07-05 |
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