JP3727015B2 - Multi-color paint composition - Google Patents

Multi-color paint composition Download PDF

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JP3727015B2
JP3727015B2 JP2001217564A JP2001217564A JP3727015B2 JP 3727015 B2 JP3727015 B2 JP 3727015B2 JP 2001217564 A JP2001217564 A JP 2001217564A JP 2001217564 A JP2001217564 A JP 2001217564A JP 3727015 B2 JP3727015 B2 JP 3727015B2
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dispersed phase
particle size
type
size distribution
paint
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JP2002053816A (en
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芳一 石田
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SK Kaken Co Ltd
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SK Kaken Co Ltd
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Description

【0001】
【産業上の利用分野】
本発明は一回の塗付により、背景色と模様色が複合して、多彩な意匠感を表現することができ、なおかつフラットで耐候性および防汚性に優れた水中油型の多彩模様塗料組成物に関するものである。
【0002】
【従来の技術】
従来より多彩感のある塗膜を形成する塗料組成物には各種のものがある。このような塗料組成物のうち、一回の塗付により多彩模様塗膜を形成する塗料は、多彩模様塗料と呼ばれ、JIS K 5667-1983 に規定されている。この規定によると、多彩模様塗料は、液状またはゲル状の2色以上の色の粒が懸濁した構成となっている。このような塗料の構成についての着想は、P.BUSCHの特許に始まり、J.C.ZOLAによって、米国特許第2591904号、日本特許第231698号として実用化された水中油型の多彩模様塗料に代表される。その後、国内外の塗料技術者によって、各種の多彩模様塗料が開発されてきたが、何れも下記の分類に帰されるものである。
【0003】
1)水中油型(以下O/Wタイプという。)
水溶性の分散媒中に、色付けした有機溶剤ベースの塗料である分散相を、識別できる程度の大きさに不連続相として分散したタイプ。
2)油中水型(以下W/Oタイプという。)
分散媒が油性であって、これに色付けした水性の分散相を不連続相として分散したタイプ。
3)油中油型(以下O/Oタイプという。)
油性の分散媒を用い、これに有機溶剤ベースのエナメルで、分散媒に相溶しない色付けをしたゾル状物質を不連続相に分散したタイプ。
4)水中水型(以下W/Wタイプという。)
水性の分散媒中に水性の色付けをしたゲル状物質を、不連続相に分散したタイプ。
1)のO/Wタイプは、J.C.ZOLAが代表的であるが、その他には例えば、特公昭42−24752号として、非水溶性の有機溶剤、あるいは油、または可塑剤に、ステアリン酸アルミニウム、2−エチルヘキソイン酸アルミニウムのごとき金属石けんを加えて膨潤させ、これにエナメル、ラッカー、ワニス、またはペイント類にシリコン樹脂のごとき撥水剤を添加した塗膜形成能を有する被覆材を加えて加熱攪拌することによってさらに膨潤、ゲル化を進行せしめて非水溶性のゲル状被覆材を形成し、これを塗膜形成材を含有する有色水性塗料中に分散させることを特徴とする安定な多彩模様塗料の製造法があげられている。2)のW/Oタイプとしては例えば、特公昭35−16241号として、アルキッド樹脂ワニス等の、塗膜形成材料の有機溶媒溶液中に、メチルセルロース、着色材料、水等からなる塗膜形成材料の水溶液もしくは水性分散液を肉眼で識別しうる粒度で分散せしめてなる多彩色塗料があげられている。3)のO/Oタイプとしては例えば、特公昭51−31250号としてエポキシ樹脂、顔料、有機溶剤の混合物を特定粘度に調整した基材に、繊維素誘導体および、エポキシ樹脂に対して非相溶性の合成樹脂を有機溶剤に溶解し顔料にて着色したカラーベースを約1部の割合で加えた多彩意匠模様コーティングの施工法があげられている。4)のW/Wタイプとしては、特開昭51−7035号として、水溶性樹脂をビヒクル成分とする着色水性塗料を分散相とし、ポリアミノカルボン酸誘導体で分散相粒子表面をゲル化せしめて水分散体とした水性多彩模様塗料があげられている。
【0004】
【発明が解決しようとする課題】
以上の各種多彩模様塗料は、分散相を分散媒に懸濁させ、両者が混合しないようにするため、O/WタイプやW/Oタイプのように疎水性を利用したり、O/OタイプやW/Wタイプの場合においても、互いに非相溶性の樹脂を使用したり、分散相の表面をゲル化させたりしている。これら多彩模様塗料は通常吹付塗装を行うが、その造膜過程において、分散相同士が融着して連続膜を形成するという機構と、吹付時の剪断力によって分散相が破壊され被塗物上に付着するという機構の複合によって塗膜を形成する。したがって、多彩模様塗料の貯蔵安定性を向上させる為等の理由により、分散相の表面に強固な膜を形成したり、形成される多彩模様を大きくするために分散相粒子を大きくしたときには、分散相の融着が部分的に不十分となったり、被塗物上に付着した分散相で隠ぺいしきれない部分が生じていた。そのような多彩模様塗料から形成される塗膜は比較的粗いポーラス状態の不連続膜となり、塗膜の耐候性や防汚性においても不安な部分を有していた。以上のように、多彩模様塗料においてその分散相の部分的な融着の不良や被塗物への隠ぺい不良等の各種の問題を解決することが本発明の解決しようとする課題である。
【0005】
【課題を解決するための手段】
これに対して本発明者らは、特にO/Wタイプの多彩模様塗料において、模様を形成する分散相の粒子系分布と背景色を形成する分散相の粒子系分布を特定の範囲に設定し、同時に両者の重量比率を規定することにより上記課題を解決した多彩模様塗料を発明した。
【0006】
すなわち、水中油型の懸濁型塗料組成物Aおよび水中油型の懸濁型塗料組成物Aとは異色の水中油型の懸濁型塗料組成物Bを含有してなる多彩模様塗料組成物であって、粒子径の対数目盛に対して、全体に占める重量比率をプロットした相関図において、A.模様部分を形成する分散相の粒子径分布曲線のモード値が0.1〜2mm、B.背景色を形成する分散相の粒子径分布曲線のモード値が0.001〜1mmであり、分散相全体の粒子径分布曲線においてA、Bそれぞれが独立のピークを有し、Aのモード値がBのモード値よりも大きく、AとBの重量比が5〜40:100となることを特徴とする水中油型の多彩模様塗料組成物である。
【0007】
A.とB.の分散相粒子径のモード値およびA.とB.の重量比が範囲外となるときには、分散相の融着が部分的に不十分となったり、被塗物上に付着した分散相で隠ぺいしきれない部分が生じ、その結果形成される塗膜は比較的粗いポーラス状態の不連続膜となり、塗膜の耐候性や防汚性が悪くなる。例えば、図2のような従来の多彩模様塗料組成物の粒子径分布概念図では、吹付時に模様形成をする粒子(影付き部分)の周辺に、比較的大きな間隙が生じるのに対して、図1のような本発明の多彩模様塗料組成物の粒子径分布では模様形成粒子の周辺の間隙を、背景色形成粒子のなかで粒子径の小さいものが埋めるような配置になっている。
【0008】
このようなA、B成分の数値範囲を超えない限り、多彩模様塗料の製造方法は限定されないが、例えば、特定の酸価を有する樹脂を顔料および有機溶剤と混合して分散相とし、カチオン性ポリビニルアルコールの水溶液を分散媒として、さらに特定のキレートタイプ有機チタネート化合物を配合した水中油型懸濁塗料組成物を製造するにあたって、分散相を分散媒に攪拌する際の分散媒中のカチオン性ポリビニルアルコールの濃度を変化させて、分散相懸濁粒子の粒度分布を特定の範囲にし、同時に分散相の色相を異なるものにした2種の物を製造し、これらを混合する方法によって本発明の多彩模様塗料組成物を製造することができる。
【0009】
すなわち、A.(a)濃度が0.1〜2.0重量%のカチオン性ポリビニルアルコール水溶液100重量部を攪拌しながら、(b)酸価が5〜30であるビニル系合成樹脂を固形分で5〜30重量%、着色材料1〜50重量%を必須成分として含有する有機溶剤系組成物50〜250重量部を徐々に添加し、さらに攪拌を継続しながら、(c)有機チタネート化合物を0.1〜4重量部(好ましくは0.1〜0.5重量部)分散させてなる水中油型の懸濁型塗料組成物1を5〜40重量部に対して、B.(a' )濃度が3.0〜7.0重量%のカチオン性ポリビニルアルコール水溶液100重量部を攪拌しながら、(b' )酸価が5〜30であるビニル系合成樹脂を固形分で5〜30重量%、着色材料1〜50重量%を必須成分として含有する有機溶剤系組成物50〜250重量部を徐々に添加し、さらに攪拌を継続しながら、(c' )有機チタネート化合物を0.1〜4重量部(好ましくは0.1〜0.5重量部)分散させてなる懸濁型塗料組成物1とは異色の懸濁型組成物2を100重量部混合することを特徴とする多彩模様塗料組成物の製造方法等が用いられる。
【0010】
ここで(a)および(a' )のカチオン性ポリビニルアルコール水溶液に使用するカチオン性ポリビニルアルコールは、特に限定されないが、その製造方法ごとに例をあげれば、第1にポリビニルアルコール重合体を後変性する方法として、特公昭30−5563号公報に記載のアミノアセタール化によるアミノ基の導入、特公昭57−34842号公報に記載のグリシジルトリメチルアンモニウムクロライドをアルカリ触媒の存在下にポリビニルアルコールと反応させ、第4級アンモニウム塩を含むカチオン性ポリビニルアルコールを製造する方法、第2に共重合させる方法として、特開昭56−14504号、特開昭56−884113号、特開昭56−118997号各公報において、アミノアルキル(メタ)アクリルアミド、アミノアルキル(メタ)アクリレート(又はその第4級アンモニウム塩)と酢酸ビニルとの共重合体をけん化してカチオン性ポリビニルアルコールを得る方法、さらに、特開昭59−135202号公報に記載のようにN−(3−アリルオキシ−2−ヒドロキシプロピル)ジメチルアミン、N−(3−アリルオキシ−2−ヒドロキシ−2−メチルプロピル)ジメチルアミン、N−(4−アリルオキシ−3−ヒドロキシブチル)ジメチルアミンやそれらの第4級アンモニウム塩等のカチオン性単量体とアルキルビニルエステルとの共重合体を部分的または完全にけん化する方法等によって得られたものなどがある。
【0011】
また、カチオン性ポリビニルアルコール水溶液の濃度はA.の場合が0.1〜2.0重量%、Bの場合が3.0〜7.0重量%であり、その重合度が1000〜1500程度のものを50℃〜80℃の温水に溶解したものでよい。
【0012】
(b)および(b' )の有機溶剤系組成物は、石油ベンゼン、ミネラルスピリット、ターペン等の脂肪族炭化水素、ベンゼン、トルエン、キシレン等の芳香族炭化水素類、シクロヘキサン等の脂環族炭化水素類、ジクロルエタン、トリクレン、パークレン等の塩素化炭化水素類等の溶剤またはこれらの混合溶剤に、酢酸ビニル、プロピオン酸ビニル等のビニルエステル類、エチルビニルエーテル、ブチルビニルエーテル等のビニルエーテル類、脂肪族アルコールのアクリレートおよびメタクリレート類、アクリロニトリル、スチレン、塩化ビニル、塩化ビニリデン、ビニルトルエン、アクリル酸、メタクリル酸等の1種または2種以上より重合させたビニル系合成樹脂と、酸化チタン、炭酸カルシウム、タルク、クレー、リトポン、ホワイトカーボン、ベントナイト、セッコウ、硫酸バリウム、マイカ、酸化鉄、オーカ、カーボンブラック、酸化クロム、群青、カドミウムレッド、ハンザイエロー、フタロシアニンブルー、フタロシアニングリーン等の着色材料を添加して混合したものである。
【0013】
このとき、ビニル系合成樹脂の酸価が5より小さい場合は、分散相の粒子表面に吸着するポリビニルアルコールの架橋レベルが低すぎて、各粒子が互いに融着してしまう。また、反対に酸価が30より大きい場合は、系のミセルが所定の粒度にならず乳化してしまう。溶剤と樹脂、および着色材料との比率は目的意匠に応じて適宜に選択可能であるが、好適には、有機溶剤20〜60重量%、ビニル系合成樹脂5〜30重量%、着色材料1〜50重量%の比率が望ましい。
【0014】
(c)および(c' )の有機チタネート化合物は、チタンを中心金属とする有機化合物であり、テトラ−i−プロポキシチタン、テトラ−n−ブトキシチタン等のアルコキシドタイプ、ジ−i−プロポキシ・ビス(アセチルアセトナト)チタン等のアシレートタイプ、ジ−n−ブトキシ・ビス(トリエタノールアミナト)チタン等のキレートタイプが使用可能であるが、ジ−n−ブトキシ・ビス(トリエタノールアミナト)チタン等のキレートタイプは、水系の分散媒中において、徐々に加水分解するため好適に用いられる。
【0015】
(a)、(b)、(c)および(a' )、(b' )、(c' )の配合比率が範囲外となるときは、目的とする多彩模様意匠感が得られないだけでなく、塗膜の耐候性も低下することになる。
【0016】
さらに、本発明の(b)および(b' )成分の有機溶剤系組成物中にさらに架橋剤を配合すると、分散相の強度が向上し攪拌時の分散相の破壊がより減少する結果となる。ただし、このように分散相の強度向上を行っても、分散相表面ゲル化膜は変化しないため、塗膜形成時の分散相の融着にはまったく影響がない。
【0017】
このような架橋剤としては、(b)および(b' )成分中の樹脂を架橋させるものであれば特に限定されないが、例えば無機系の化合物としては、酸化マグネシウム、酸化カルシウム、酸化亜鉛、酸化アルミニウム等の金属酸化物、塩化カルシウム、塩化マグネシウム等の金属ハロゲン化物、有機系の化合物としては、酢酸カルシウム、フタル酸カルシウム等の有機酸金属塩、フェノールおよびアミノ樹脂、アミンおよびアジリジン化合物、イソシアネート、さらにビニルトリエトキシシラン、ビニルトリス(β−メトキシエトキシ)シラン、γ−メタクリロキシプロピルトリメトキシシラン等のシランカップリング剤や前述の有機チタネート化合物も使用可能である。このような有機カップリング剤はその種別によって配合比率も変動するが、おおよそ有機溶剤系組成物中で1〜5重量%となるぐらいが望ましい。また、この架橋剤により分散相内部をある程度架橋させるため、分散相の形成樹脂の酸価は有機カップリング剤を配合しないときが5〜30に対して、1〜30の範囲に広げても、攪拌時の破壊が生じず、目的の懸濁型塗料組成物が得られる。
【0018】
【実施例】
(参考例1)
表1の原料を使用して、表2の配合例に基づき、分散媒をインペラーの周速2.5m/sにて攪拌しながら、分散相となる有機溶剤系組成物を配合した。その結果、分散相の粒子径分布が0.2〜3.0mm、モード値が0.8mmの懸濁型塗料組成物が製造できた。
【0019】
(参考例2)
インペラーの周速を1.5m/sにした以外は参考例1と同様にしたところ、分散相の粒子径分布が0.6〜6.0mm、モード値が3.0mmの懸濁型塗料組成物を製造することができた。
【0020】
(参考例3)
表1の原料を使用して、表2の配合例のごとくカチオン性のポリビニルアルコールの濃度が参考例1と異なるものにつき、分散媒をインペラーの周速2.5m/sにて攪拌しながら、分散相となる有機溶剤系組成物を配合した。その結果、分散相の粒子径分布が0.003〜0.5mm、モード値が0.1mmの懸濁型塗料組成物が製造できた。なお、この懸濁型塗料組成物は参考例1および参考例2と異なり、種ペンを使用しなかったため異色となった。
【0021】
(実施例1)
表3に示した配合にて多彩模様塗料組成物を製造した。この多彩模様塗料を表4に示した項目について試験を行った。結果を同じく表3に示した。結果から明白なようにすべての項目について良好であった。
【0022】
(実施例2)
表3に示した配合のように、実施例1より参考例1の懸濁型塗料組成物の配合比率が高い以外は同様にして試験を行った。結果を同じく表3に示した。結果から明白なようにすべての項目について良好であった。
【0023】
(比較例1)
表3に示した配合のように、参考例1の懸濁型塗料組成物の配合比率が、本発明の規定範囲より少ない以外は実施例1と同様にして試験を行った。結果は表3に示したように、模様形成部分の量が少ないため、多彩模様パターンが背景色中に埋もれてしまい明瞭に表れなかった。
【0024】
(比較例2)
表3に示した配合のように、参考例1の懸濁型塗料組成物の配合比率が、本発明の規定範囲より多い以外は実施例1と同様にして試験を行った。結果は表3に示したように、模様形成部分(粒子径分布の大きい部分)が背景色を形成する部分(粒子径分布の小さい部分)と比較して相対的に増加するため、塗膜化した際に模様形成する分散相粒子間の間隙が大きくなり、各種塗膜物性値において実施例より劣った。
【0025】
(比較例3)
表3に示した配合のように、参考例2の懸濁型塗料組成物を使用し、配合比率を発明の規定範囲内にした以外は実施例1と同様にして試験を行った。結果は表3に示したように、参考例2の懸濁型塗料組成物の分散相粒子径がHSガンのチップ口径より大きいため、ガン詰まりを起こしてしまった。
【0026】
(比較例4)
市販の他社品Aについて、その分散相粒子の分布を測定し図3に示した。図3から明白なように市販品は模様形成部分と背景色形成部分からなるにもかかわらず各々が独立した粒子径分布のピークを有していなかった。この他社品Aについて実施例1と同様にして試験を行った。結果は表3に示したように、比較例2と同様に、粒子径分布の小さいものが少ないため、塗膜化した際に模様形成する分散相粒子間の間隙が大きくなり、各種塗膜物性値において実施例より劣った。
【0027】
【表1】

Figure 0003727015
【表2】
Figure 0003727015
【表3】
Figure 0003727015
【表4】
Figure 0003727015
【発明の効果】
本発明の多彩模様塗料組成物は、粒子径の対数目盛に対して、全体に占める重量比率をプロットした相関図において、模様を形成する分散相と背景色を形成する分散相のそれぞれの粒子径分布のモード値と配合比率を特定範囲にして、さらに分散相全体の粒子径分布曲線において、模様形成部分と背景色形成部分が独立したピークを有するようにすることで、その多彩模様塗料組成物より形成された多彩模様塗膜が、従来の水中油型多彩模様塗料組成物より形成される多彩模様塗膜に比較して、各種の塗膜物性に優れるという効果がある。
【図面の簡単な説明】
【図1】本発明の多彩模様塗料組成物の分散相粒子径分布の状態を示す概念図である。
【図2】従来の多彩模様塗料組成物の分散相粒子径分布の状態を示す概念図である。
【図3】実施例1と比較例4の多彩模様塗料組成物の分散相粒子径分布の測定値について粒子径を対数目盛にし、縦軸を全体にしめる重量比率にした図である。
【符号の説明】
1 模様形成粒子
2 実施例1の粒子径分布曲線
3 比較例4の粒子径分布曲線
A 分散相の粒子径
B 全体に占める重量比(%)[0001]
[Industrial application fields]
The present invention combines a background color and a pattern color by a single application to express a variety of design feelings, and is a flat, oil-in-water multicolor pattern paint with excellent weather resistance and antifouling properties. It relates to a composition.
[0002]
[Prior art]
Conventionally, there are various types of coating compositions that form a multicolored coating film. Among such paint compositions, a paint that forms a multicolored paint film by a single application is called a multicolored paint and is defined in JIS K 5667-1983. According to this rule, the multicolored paint has a structure in which particles of two or more colors of liquid or gel are suspended. The idea for the composition of such a paint is described in P.A. Starting with the BUSCH patent, C. It is represented by oil-in-water type multicolored paints that have been put into practical use by ZOLA as US Pat. No. 2,591,904 and Japanese Patent No. 231,698. Since then, various paints of various patterns have been developed by paint engineers in Japan and overseas, all of which are attributed to the following classifications.
[0003]
1) Oil-in-water type (hereinafter referred to as O / W type)
A type in which a disperse phase, which is a colored organic solvent-based paint, is dispersed as a discontinuous phase in a water-soluble dispersion medium so that it can be identified.
2) Water-in-oil type (hereinafter referred to as W / O type)
A type in which the dispersion medium is oily, and an aqueous dispersion phase colored to this is dispersed as a discontinuous phase.
3) Oil-in-oil type (hereinafter referred to as O / O type)
This type uses an oil-based dispersion medium and an organic solvent-based enamel that disperses a discolored sol-like substance that is incompatible with the dispersion medium.
4) Underwater type (hereinafter referred to as W / W type)
A type in which an aqueous colored gel material is dispersed in a discontinuous phase in an aqueous dispersion medium.
The O / W type of 1) is J.W. C. ZOLA is a representative example. In addition, for example, as Japanese Patent Publication No. 42-24752, a metal soap such as aluminum stearate or aluminum 2-ethylhexoate is added to a water-insoluble organic solvent, oil, or plasticizer. In addition, it is swollen and added to the enamel, lacquer, varnish, or paint with a coating material that has a film-forming ability to which a water repellent such as silicone resin is added, and then heated and stirred to further promote swelling and gelation. There has been mentioned a method for producing a stable and colorful pattern paint characterized by forming a water-insoluble gel-like coating material and dispersing it in a colored water-based paint containing a coating film-forming material. As the W / O type of 2), for example, as Japanese Patent Publication No. 35-16241, a coating film forming material comprising methylcellulose, a coloring material, water, etc. in an organic solvent solution of a coating film forming material such as an alkyd resin varnish. There are various color paints in which an aqueous solution or an aqueous dispersion is dispersed with a particle size that can be identified with the naked eye. As the O / O type of 3), for example, as described in Japanese Examined Patent Publication No. 51-31250, a base material in which a mixture of an epoxy resin, a pigment, and an organic solvent is adjusted to a specific viscosity is incompatible with a fiber derivative and an epoxy resin. There is a method of applying a variety of design coatings in which a color base prepared by dissolving a synthetic resin in an organic solvent and colored with a pigment is added at a ratio of about 1 part. As the W / W type of 4), as disclosed in JP-A-51-7035, a colored water-based paint containing a water-soluble resin as a vehicle component is used as a dispersed phase, and the surface of the dispersed phase particles is gelled with a polyaminocarboxylic acid derivative. A water-based colorful pattern paint is used as a dispersion.
[0004]
[Problems to be solved by the invention]
The above-mentioned various pattern paints use hydrophobicity such as O / W type and W / O type in order to suspend the dispersed phase in the dispersion medium and prevent them from mixing. Even in the case of the W / W type, resins that are incompatible with each other are used, or the surface of the dispersed phase is gelled. These multicolored paints are usually sprayed. In the film-forming process, the dispersed phases are fused together to form a continuous film, and the dispersed phase is destroyed by the shearing force at the time of spraying. A coating film is formed by a composite mechanism of adhering to the film. Therefore, when the dispersed phase particles are enlarged to form a strong film on the surface of the dispersed phase or to increase the formed colorful pattern for reasons such as improving the storage stability of the colorful pattern paint, Phase fusion was partially insufficient, or a portion that could not be concealed by the dispersed phase deposited on the substrate was generated. The coating film formed from such a multicolored paint becomes a discontinuous film in a relatively coarse porous state, and has an uneasy part in the weather resistance and antifouling property of the coating film. As described above, it is a problem to be solved by the present invention to solve various problems such as partial fusion failure of the dispersed phase and poor concealment on the object to be coated in the multicolor paint.
[0005]
[Means for Solving the Problems]
On the other hand, the present inventors set the particle system distribution of the dispersed phase forming the pattern and the particle system distribution of the dispersed phase forming the background color within a specific range, particularly in the O / W type multicolor pattern paint. At the same time, the inventors have invented a multicolored paint that solves the above problems by defining the weight ratio between the two.
[0006]
That is, an oil- in- water suspension type coating composition A and an oil-in-water type suspension type coating composition A containing an oil- in- water type suspension type coating composition B different in color from the oil- in- water type suspension coating composition A In the correlation diagram in which the weight ratio in the whole is plotted against the logarithmic scale of the particle diameter, A. The mode value of the particle size distribution curve of the dispersed phase forming the pattern portion is 0.1 to 2 mm; The mode value of the particle size distribution curve of the dispersed phase forming the background color is 0.001 to 1 mm, and A and B have independent peaks in the particle size distribution curve of the entire dispersed phase, and the mode value of A is It is an oil- in- water multicolor pattern coating composition characterized by being larger than the mode value of B and having a weight ratio of A to B of 5 to 40: 100.
[0007]
A. And B. Mode value of the dispersed phase particle size of And B. When the weight ratio is out of the range, the disperse phase is partially insufficiently fused, or the disperse phase adhering to the coating produces a part that cannot be concealed, resulting in a coating film formed. Becomes a relatively rough discontinuous film in a porous state, and the weather resistance and antifouling property of the coating film are deteriorated. For example, in the particle size distribution conceptual diagram of the conventional multicolor pattern paint composition as shown in FIG. 2, a relatively large gap is generated around the particles (shaded portions) that form a pattern during spraying. In the particle size distribution of the multicolor pattern coating composition of the present invention such as 1, the gap around the pattern forming particles is arranged to fill the background color forming particles having a smaller particle size.
[0008]
As long as the numerical ranges of the components A and B are not exceeded, the production method of the multicolored paint is not limited. For example, a resin having a specific acid value is mixed with a pigment and an organic solvent to form a dispersed phase, In producing an oil-in-water suspension coating composition containing a specific chelate type organic titanate compound using an aqueous solution of polyvinyl alcohol as a dispersion medium, cationic polyvinyl in the dispersion medium when stirring the dispersion phase in the dispersion medium By changing the concentration of the alcohol to make the particle size distribution of the dispersed phase suspended particles in a specific range, and at the same time, producing two kinds of products in which the hues of the dispersed phase are different, and mixing these, Pattern paint compositions can be produced.
[0009]
That is, A. (A) While stirring 100 parts by weight of a cationic polyvinyl alcohol aqueous solution having a concentration of 0.1 to 2.0% by weight, (b) a vinyl synthetic resin having an acid value of 5 to 30 in a solid content of 5 to 30 While gradually adding 50 to 250 parts by weight of an organic solvent composition containing 1% by weight and 1 to 50% by weight of a coloring material as essential components, and further stirring, (c) an organic titanate compound is added in an amount of 0.1 to 4 to 5 parts by weight (preferably 0.1 to 0.5 part by weight) of an oil-in-water suspension coating composition 1 dispersed in an amount of 5 to 40 parts by weight (A ′) While stirring 100 parts by weight of a cationic polyvinyl alcohol aqueous solution having a concentration of 3.0 to 7.0% by weight, (b ′) a vinyl synthetic resin having an acid value of 5 to 30 in terms of solid content. The organic titanate compound (c ') was added to 0 by gradually adding 50 to 250 parts by weight of an organic solvent composition containing 30 to 30% by weight and 1 to 50% by weight of a coloring material as essential components. .1 to 4 parts by weight (preferably 0.1 to 0.5 parts by weight) dispersed in the suspension type coating composition 1 is mixed with 100 parts by weight of the suspension type composition 2 having a different color. A method for producing a multicolor pattern coating composition is used.
[0010]
Here, the cationic polyvinyl alcohol used in the cationic polyvinyl alcohol aqueous solution of (a) and (a ′) is not particularly limited. For example, for each production method, first, the polyvinyl alcohol polymer is post-modified. As a method of introducing amino group by aminoacetalization described in JP-B-30-5563, glycidyltrimethylammonium chloride described in JP-B-57-34442 is reacted with polyvinyl alcohol in the presence of an alkali catalyst, As a method for producing a cationic polyvinyl alcohol containing a quaternary ammonium salt and a second method for copolymerization, JP-A Nos. 56-14504, 56-8811313 and 56-118997 are disclosed. Aminoalkyl (meth) acrylamide, amino A method of obtaining cationic polyvinyl alcohol by saponifying a copolymer of rualkyl (meth) acrylate (or a quaternary ammonium salt thereof) and vinyl acetate, and further, N as described in JP-A-59-135202. -(3-allyloxy-2-hydroxypropyl) dimethylamine, N- (3-allyloxy-2-hydroxy-2-methylpropyl) dimethylamine, N- (4-allyloxy-3-hydroxybutyl) dimethylamine and their There are those obtained by a method of partially or completely saponifying a copolymer of a cationic monomer such as a quaternary ammonium salt and an alkyl vinyl ester.
[0011]
The concentration of the cationic polyvinyl alcohol aqueous solution is A. 0.1 to 2.0% by weight in the case of B, 3.0 to 7.0% by weight in the case of B, and those having a polymerization degree of about 1000 to 1500 were dissolved in hot water of 50 ° C. to 80 ° C. Things can be used.
[0012]
The organic solvent composition of (b) and (b ′) is composed of aliphatic hydrocarbons such as petroleum benzene, mineral spirits and terpenes, aromatic hydrocarbons such as benzene, toluene and xylene, and alicyclic carbonization such as cyclohexane. Solvents such as hydrogen, dichloroethane, trichlene, parkren and other chlorinated hydrocarbons or mixed solvents thereof, vinyl esters such as vinyl acetate and vinyl propionate, vinyl ethers such as ethyl vinyl ether and butyl vinyl ether, aliphatic alcohols Acrylates and methacrylates, acrylonitrile, styrene, vinyl chloride, vinylidene chloride, vinyltoluene, acrylic acid, methacrylic acid, etc., a vinyl-based synthetic resin polymerized from one or more, titanium oxide, calcium carbonate, talc, Clay, lithopone, white Bon, bentonite, gypsum, is a mixture with the addition of barium sulfate, mica, iron oxide, Oka, carbon black, chromium oxide, ultramarine, cadmium red, Hansa yellow, phthalocyanine blue, coloring materials such as phthalocyanine green.
[0013]
At this time, if the acid value of the vinyl-based synthetic resin is less than 5, the crosslinking level of polyvinyl alcohol adsorbed on the particle surface of the dispersed phase is too low and the particles are fused to each other. On the other hand, when the acid value is larger than 30, the micelles of the system are emulsified without a predetermined particle size. The ratio of the solvent, the resin, and the coloring material can be appropriately selected according to the target design. Preferably, the organic solvent is 20 to 60% by weight, the vinyl synthetic resin is 5 to 30% by weight, the coloring material 1 to A ratio of 50% by weight is desirable.
[0014]
The organic titanate compounds (c) and (c ′) are organic compounds having titanium as a central metal, and alkoxide types such as tetra-i-propoxy titanium and tetra-n-butoxy titanium, and di-i-propoxy bis. Acylate types such as (acetylacetonato) titanium and chelate types such as di-n-butoxy bis (triethanolaminato) titanium can be used, but di-n-butoxy bis (triethanolaminato) A chelate type such as titanium is preferably used because it gradually hydrolyzes in an aqueous dispersion medium.
[0015]
When the blending ratio of (a), (b), (c) and (a ′), (b ′), (c ′) is out of the range, the desired multicolored design feeling cannot be obtained. In addition, the weather resistance of the coating film is also lowered.
[0016]
Further, when a crosslinking agent is further blended in the organic solvent composition of the components (b) and (b ′) of the present invention, the strength of the dispersed phase is improved and the destruction of the dispersed phase during stirring is further reduced. . However, even if the strength of the dispersed phase is improved in this way, the dispersed phase surface gelled film does not change, and therefore there is no influence on the fusion of the dispersed phase at the time of coating film formation.
[0017]
Such a crosslinking agent is not particularly limited as long as it can crosslink the resins in the components (b) and (b ′). For example, inorganic compounds include magnesium oxide, calcium oxide, zinc oxide, oxidation Metal oxides such as aluminum, metal halides such as calcium chloride and magnesium chloride, organic compounds include organic acid metal salts such as calcium acetate and calcium phthalate, phenol and amino resins, amine and aziridine compounds, isocyanates, Furthermore, silane coupling agents such as vinyltriethoxysilane, vinyltris (β-methoxyethoxy) silane, and γ-methacryloxypropyltrimethoxysilane and the above-mentioned organic titanate compounds can also be used. The blending ratio of such an organic coupling agent varies depending on the type, but it is preferably about 1 to 5% by weight in the organic solvent-based composition. In addition, since the inside of the dispersed phase is crosslinked to some extent by this crosslinking agent, even if the acid value of the resin forming the dispersed phase is 5-30 when no organic coupling agent is blended, The target suspension-type coating composition is obtained without breaking during stirring.
[0018]
【Example】
(Reference Example 1)
Using the raw materials shown in Table 1, based on the formulation examples in Table 2, an organic solvent-based composition serving as a dispersed phase was blended while stirring the dispersion medium at an impeller peripheral speed of 2.5 m / s. As a result, a suspension-type coating composition having a dispersed phase particle size distribution of 0.2 to 3.0 mm and a mode value of 0.8 mm could be produced.
[0019]
(Reference Example 2)
The same procedure as in Reference Example 1 except that the peripheral speed of the impeller was 1.5 m / s. As a result, a suspension type paint composition in which the particle size distribution of the dispersed phase was 0.6 to 6.0 mm and the mode value was 3.0 mm. The product could be manufactured.
[0020]
(Reference Example 3)
Using the raw materials of Table 1 and mixing the dispersion medium at a peripheral speed of the impeller of 2.5 m / s, the cationic polyvinyl alcohol concentration is different from that of Reference Example 1 as shown in the formulation example of Table 2, An organic solvent-based composition to be a dispersed phase was blended. As a result, a suspension-type coating composition having a dispersed phase particle size distribution of 0.003 to 0.5 mm and a mode value of 0.1 mm could be produced. Note that, unlike the reference examples 1 and 2, this suspension type coating composition had a different color because no seed pen was used.
[0021]
(Example 1)
A multi-color paint composition was prepared with the formulation shown in Table 3. This multicolored paint was tested for the items shown in Table 4. The results are also shown in Table 3. As is clear from the results, all items were good.
[0022]
(Example 2)
The test was conducted in the same manner except that the blending ratio of the suspension type paint composition of Reference Example 1 was higher than that of Example 1 as shown in Table 3. The results are also shown in Table 3. As is clear from the results, all items were good.
[0023]
(Comparative Example 1)
As shown in Table 3, the test was conducted in the same manner as in Example 1 except that the blending ratio of the suspension type coating composition of Reference Example 1 was less than the specified range of the present invention. As shown in Table 3, since the amount of the pattern forming portion was small, the colorful pattern was buried in the background color and was not clearly displayed.
[0024]
(Comparative Example 2)
As shown in Table 3, the test was conducted in the same manner as in Example 1 except that the blending ratio of the suspension type coating composition of Reference Example 1 was larger than the specified range of the present invention. As shown in Table 3, since the pattern formation part (part with a large particle size distribution) relatively increases compared to the part that forms the background color (part with a small particle size distribution), the coating was formed. In this case, the gap between the dispersed phase particles forming the pattern was increased, and various coating film physical properties were inferior to those of the examples.
[0025]
(Comparative Example 3)
The test was conducted in the same manner as in Example 1 except that the suspension type paint composition of Reference Example 2 was used as shown in Table 3 and the blending ratio was within the specified range of the invention. As a result, as shown in Table 3, since the dispersed phase particle diameter of the suspension type coating composition of Reference Example 2 was larger than the tip diameter of the HS gun, the clogging of the gun occurred.
[0026]
(Comparative Example 4)
The distribution of dispersed phase particles of a commercial product A of the other company was measured and shown in FIG. As is apparent from FIG. 3, the commercially available product did not have an independent particle size distribution peak even though it consisted of a pattern forming portion and a background color forming portion. This competitor A was tested in the same manner as in Example 1. As shown in Table 3, the results are the same as in Comparative Example 2, since there are few particles with a small particle size distribution, the gaps between the dispersed phase particles forming the pattern when formed into a coating film become large, and various coating film properties The value was inferior to the example.
[0027]
[Table 1]
Figure 0003727015
[Table 2]
Figure 0003727015
[Table 3]
Figure 0003727015
[Table 4]
Figure 0003727015
【The invention's effect】
The multicolor pattern coating composition of the present invention is a correlation diagram in which the ratio of the weight to the whole is plotted against the logarithmic scale of the particle diameter, and each particle diameter of the dispersed phase forming the pattern and the dispersed phase forming the background color By setting the distribution mode value and blending ratio to a specific range, and further making the pattern formation part and the background color formation part have independent peaks in the particle size distribution curve of the entire dispersed phase, the multicolor pattern paint composition The multi-pattern coating film formed more effectively has various film properties as compared with the multi-pattern coating film formed from the conventional oil-in-water multi-color coating composition.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a state of a dispersed phase particle size distribution of a multicolored paint composition of the present invention.
FIG. 2 is a conceptual diagram showing a state of a dispersed phase particle size distribution of a conventional multicolor pattern coating composition.
FIG. 3 is a graph showing the measured values of the dispersed phase particle size distribution of the multicolor pattern coating compositions of Example 1 and Comparative Example 4 in a particle ratio with a logarithmic scale and a weight ratio with the vertical axis as a whole.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pattern formation particle 2 Particle size distribution curve 3 of Example 1 Particle size distribution curve A of Comparative Example 4 Particle size B of a dispersed phase Weight ratio (%) to the whole

Claims (1)

水中油型の懸濁型塗料組成物Aおよび懸濁型塗料組成物Aとは異色の水中油型の懸濁型塗料組成物Bを含有してなる多彩模様塗料組成物であって、粒子径の対数目盛に対して、全体に占める重量比率をプロットした相関図において、A.模様部分を形成する分散相の粒子径分布曲線のモード値が0.1〜2mm、B.背景色を形成する分散相の粒子径分布曲線のモード値が0.001〜1mmであり、分散相全体の粒子径分布曲線においてA、Bそれぞれが独立のピークを有し、Aのモード値がBのモード値よりも大きく、AとBの重量比が5〜40:100となることを特徴とする水中油型の多彩模様塗料組成物。 An oil-in-water suspension type paint composition A and a suspension type paint composition A are multi-color paint compositions comprising an oil- in- water type suspension paint composition B different in color, and having a particle size In the correlation diagram in which the ratio of weight to the whole is plotted against the logarithmic scale of The mode value of the particle size distribution curve of the dispersed phase forming the pattern portion is 0.1 to 2 mm; The mode value of the particle size distribution curve of the dispersed phase forming the background color is 0.001 to 1 mm, and A and B have independent peaks in the particle size distribution curve of the entire dispersed phase, and the mode value of A is An oil- in- water multicolor pattern coating composition having a weight ratio between A and B of 5 to 40: 100, which is larger than the mode value of B.
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