JP2004277653A

JP2004277653A - Pattern coating film and method for forming the same

Info

Publication number: JP2004277653A
Application number: JP2003073981A
Authority: JP
Inventors: Koji Sasaki; 功司佐々木
Original assignee: Fujikura Kasei Co Ltd
Current assignee: Fujikura Kasei Co Ltd
Priority date: 2003-03-18
Filing date: 2003-03-18
Publication date: 2004-10-07

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pattern coating film capable of being easily formed by painting a coating without requiring any complex painting process and without relying on the skillfulness of a painter, and excellent in water and weather resistance, durability, and designability. <P>SOLUTION: The pattern coating film contains colored particles wherein the weight ratio of the particles to the coating film component is controlled. The coating film is formed through single painting , wherein the colored particle is present not in the region within 5 μm deep from the surface of the coating film, but at least present in the region 5 to 100 μm deep. The coating film has the advantages that it requires no clear painting and may be formed through single painting. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、耐水性、耐久性及び耐候性に優れ、且つ意匠性の高い模様塗膜、並びに前記模様塗膜の形成方法に関する。
【０００２】
【従来の技術】
多彩模様塗料は、油性または水性分散媒中に、この分散媒には溶解しない状態で、いくつかの異なった色調の着色粒子を懸濁分散せしめてなるもので、１回の塗装で色調の異なった斑点状、滴状、粒状等の組み合わせからなる、いわゆる色散らし模様の得られる塗料として従来周知であり、例えば、ＪＩＳ−Ｋ−５６６７にも規定されている。
【０００３】
多彩模様塗料を塗装することにより形成される多彩模様塗膜は、意匠性重視の設計のため、建築外装や水回り等での使用の際に、素地からのエフロによる退色や、経時的に黄変・チョーキングを生じ易い。さらに、塗膜中の着色粒子を覆う塗膜形成成分が屋外暴露時に雨等で溶解して、塗膜形成成分と着色粒子の間の界面で劣化が生じ、剥がれが形成され易い。このように多彩模様塗膜は、耐水性、耐久性に劣り、厳しい環境下では初期の塗膜状態の維持が困難であり、さらに形成された塗膜の汚染による美観の低下も問題であった。
【０００４】
上記問題点の解決策として、例えば多彩模様塗膜の下塗りに弾性塗材を用いることが提案されている（例えば特許文献１参照）。この方法によれば、素地からのエフロは防止できるが、多彩模様塗料として親水性コロイド形成物質のゲル化膜でカプセル化されている合成樹脂エマルションを使用するため、塗膜形成時に着色粒子同士が完全に融着せず、経時的に着色粒子間の亀裂による剥がれが生じ、初期の塗膜状態を維持できるものではなかった。
【０００５】
また最近、特定の着色粒子を１種以上含有する多彩模様塗料を塗装した後、クリヤー塗料を塗装することにより、耐水性や耐久性に優れ且つ意匠性の高い多彩模様塗膜を形成する仕上げ方法が提案されている（例えば特許文献２参照）。
【０００６】
【特許文献１】
特公昭６２−８７２８５号公報
【特許文献２】
特開平９−５７１８６号公報
【０００７】
【発明が解決しようとする課題】
しかしながらこの方法では、多彩模様塗膜を形成した後に、それに被せてクリヤー塗料を塗装するため、塗装工程が少なくとも一度以上増すこととなり、塗装工程に手間と煩雑さを与えるという問題が存在する。さらに塗装工の熟練度により、クリヤー塗膜の厚さに差異が生じてしまい、要求される意匠外観を達成できないという問題も存在する。また、多彩模様塗膜の上にクリヤー塗膜が形成されていない恐れも存在する。
【０００８】
従って、本発明は、複雑な塗装工程の必要がなく、且つ塗装工の熟練度に頼ることなく、塗料を塗装して容易に形成可能である、耐水性、耐久性及び耐候性に優れ、且つ意匠性の高い多彩模様塗膜を含む模様塗膜及びその形成方法を目的とする。
【０００９】
【課題を解決するための手段】
本発明者らは、上記課題を解決するために鋭意研究を重ねた結果、塗膜形成成分に対する着色粒子の質量比を調節することにより、着色粒子が塗膜の表面から５μｍの領域には存在せず、５〜１００μｍの領域には少なくとも存在することを特徴とする模様塗膜が、１回の塗装により形成されることを見出した。この５〜１００μｍの膜厚の層は、クリヤー層として機能することができるため、本発明によれば、クリヤー塗装の必要なく、１回の塗装で目的とする模様塗膜を形成可能であるという利点を有する。
【００１０】
従って、本発明の模様塗膜は、着色粒子を含んだ模様塗膜において、前記着色粒子が前記塗膜の表面から５μｍの領域には存在せず、５〜１００μｍの領域には少なくとも存在することを特徴とする。
さらに、本発明の模様塗膜は、エナメル塗料からなる下地層が形成されていても良い。
ここで、本発明の模様塗膜は、紫外線吸収剤及び／または光安定剤を含有することが望ましい。
【００１１】
本発明の模様塗膜の形成方法は、着色粒子を１〜６０質量％含む塗料で塗膜を形成することを特徴とする。
さらに、エナメル塗料からなる下地層上に、着色粒子を１〜６０重量％含む塗料で塗膜を形成することが好ましい。
ここで、着色粒子がゲル状であることが望ましい。
さらに、ゲル状の着色粒子中に、紫外線吸収剤及び／または光安定剤を含有させることが望ましい。
またさらに、塗料がエマルション系塗料であることが望ましい。
【００１２】
【発明の実施の形態】
図１を参考にして、本発明の模様塗膜を説明する。本発明に係る模様塗膜（１）は、基材（２）の上に形成され、塗膜形成成分（１ｂ）中に着色粒子（１ａ）を含んでなる。着色粒子（１ａ）は１色以上のものであり、この着色粒子（１ａ）が前記塗膜（１）の表面から５μｍの領域には存在せず、５〜１００μｍの領域には少なくとも存在することを特徴とする。
【００１３】
本発明における「塗膜形成成分（１ｂ）」は、本発明に係る塗膜（１）を形成する樹脂を含む成分を指し、樹脂成分としては、例えばアクリル樹脂、スチレン−アクリル樹脂、アクリル−シリコーン樹脂、酢酸ビニル樹脂、エチレン−酢酸ビニル樹脂などが使用できる。
【００１４】
本発明における「着色粒子（１ａ）」は、本発明に係る塗膜（１）に模様を与えるためのもので、粒径が０．１〜３ｍｍの範囲のいずれに着色された粒子を指し、例えば硅砂、石英、陶磁器粉砕粒子、炭酸カルシウム、雲母、樹脂ビーズ等の公知の骨材、及び／またはゲル状の着色粒子であって良い。また本発明の塗膜（１）は、少なくとも２色以上の着色粒子（１ａ）を含み、多彩模様塗膜を構成しても良い。
【００１５】
本発明に係る模様塗膜（１）は、水系分散媒（該分散媒に、塗膜形成成分として合成樹脂エマルションを含有しても良い）中に、親水性コロイド形成物質のゲル化膜でカプセル化されてなるゲル状の着色粒子を分散させたタイプの合成樹脂エマルションよりなる塗料を用いて形成するのが好ましい。
【００１６】
本発明における「ゲル状」とは、セルロース誘導体、ポリビニルアルコールなどのような親水性コロイド形成物質と前記コロイド物質を不溶化することのできるホウ素、マグネシウムモンモリロナイトのような不溶化剤（ゲル化剤）とが作用しあって、一種の三次元的網状組織が形成された状態を意味する。
【００１７】
従って、ゲル化膜でカプセル化されたゲル状の着色粒子は、親水性コロイドを不溶化する公知の技術で製造され得るものであり、親水性コロイド形成物質を含む着色樹脂エマルジョンを、ゲル化剤を含む水媒体中に混合し、分散させることにより調製することができる。
【００１８】
着色粒子は模様塗膜の表面から５μｍの領域に存在しないので、厳しい環境条件においてでさえ、塗膜形成成分と着色粒子と間の亀裂による剥がれが生じにくくなるため、塗膜の耐候性を向上することが可能となる。また着色粒子は模様塗膜の表面から５〜１００μｍの領域に存在するので、模様塗膜中の着色粒子が厚い塗膜形成成分で覆われることがなく、その色彩が外部から明瞭となるため、意匠性が向上した模様塗膜を形成可能である。従って、着色粒子が本発明に係る塗膜の表面から５μｍの領域には存在せず、５〜１００μｍの領域には少なくとも存在することが、塗膜の耐候性及び意匠性の点から最も適切である。
【００１９】
本発明では、塗膜形成成分（１ｂ）と着色粒子（１ａ）とを含む塗料に対する着色粒子の質量比が、１〜６０質量％となるような塗料を用いることで、着色粒子が本発明に係る塗膜の表面から５μｍの領域には存在せず、５〜１００μｍの領域には少なくとも存在するようになる。
【００２０】
本発明に係る模様塗膜（１）は、紫外線吸収剤及び／または光安定剤を含んでも良い。さらに、紫外線吸収剤及び／または光安定剤は、ゲル状の着色粒子（１ａ）中に存在しても良い。ここで「紫外線吸収剤及び／または光安定剤」とは、公知の紫外線吸収剤及び／または光安定剤を含めて指すものであり、紫外線吸収剤としては、ベンゾフェノン系、シアノアクリレート系、シュウ酸アニリド系、ベンゾトリアゾール系、トリアジン系などの各種紫外線吸収剤を使用でき、光安定剤としては、各種のラジカル補捉剤を使用できる。
【００２１】
本発明に係る模様塗膜に含有される紫外線吸収剤の具体例としては、ベンゾトリアゾール系紫外線吸収剤である、チバ・スペシャルティ・ケミカルズ（株）製、製品名：ＴＩＮＵＶＩＮ１１３０等が挙げられ、光安定剤の具体例としては、ヒンダードアミン系安定剤である、チバ・スペシャルティ・ケミカルズ（株）製、製品名：ＴＩＮＵＶＩＮ２９２等が挙げらる。
【００２２】
紫外線吸収剤及び光安定剤は、どちらか一方を使用しても良いし、両者を併用しても良いが、紫外線吸収剤及び光安定剤を併用すると、これらを含有する模様塗膜は、高い耐候性を達成できるため好ましい。
【００２３】
本発明に係る模様塗膜（１）で塗装される基材（２）としては、コンクリート板、石綿セメント板、ハードボード、石膏ボード、石綿パーライト板、ケイ酸カルシウム板等の建築用ボード類、ＡＢＳ樹脂、スチレン樹脂、アクリル樹脂、塩化ビニル樹脂、メラミン樹脂、ポリエステル樹脂等のプラスチック類、鉄板、アルミ板、ブリキ板、トタン板等の金属類、木材、合成木材ガラス、セラミック等広範囲な材料が挙げられる。但し、本発明の模様塗膜が建築基材上に塗装される際には、基材上に下塗り塗膜または中塗り塗膜を作成した後、その上部に本発明の模様塗膜を塗装しても良い。また、本発明の模様塗膜は、エナメル塗料からなる下地層が形成されていても良い。
【００２４】
最も効果的な本発明に係る模様塗膜（１）が得られる塗装方法はスプレー塗装であるが、これに限定されるものではなく、刷毛、ローラー、カーテンフローコーター等の公知の塗装方法を適用することによって、それぞれの塗装方法の持つ特徴が生かされた独特な模様を得ることも可能である。
【００２５】
【実施例】
本発明の具体例を以下の実施例により詳述する。尚、以下に述べる配合量は、全て質量部を示す。
【００２６】
塗膜形成成分Ａの作製
水性エマルションとして、アクリル樹脂を４５質量％含有する旭化成（株）製ポリトロンＥ−３６０９５質量部と造膜助剤（イーストマンケミカルジャパン（株）製、商品名：テキサノール）５質量部を混合した。
【００２７】
塗膜形成成分Ｂの作製
水性エマルションとして、アクリル樹脂を４５質量％含有する旭化成（株）製ポリトロンＥ−３６０９４質量部と造膜助剤（イーストマンケミカルジャパン（株）製、商品名：テキサノール）５質量部、紫外線吸収剤としてＴＩＮＵＶＩＮ１１３０（チバ・スペシャルティ・ケミカルズ（株）製）０．５質量部、光安定剤としてＴＩＮＵＶＩＮ２９２（チバ・スペシャルティ・ケミカルズ（株）製）０．５質量部を攪拌混合した。
【００２８】
実施例１
上記塗膜形成成分Ａ５０質量部、白色硅砂（神東陶料（株）製、商品名：カラーサンドホワイト）２５質量部、黒色硅砂（神東陶料（株）製、商品名：カラーサンドブラック）２５質量部を混合攪拌して塗料を製造した。
【００２９】
実施例２
上記塗膜形成成分Ｂ５０質量部、白色硅砂（神東陶料（株）製、商品名：カラーサンドホワイト）２５質量部、黒色硅砂（神東陶料（株）製、商品名：カラーサンドブラック）２５質量部を混合攪拌して塗料を製造した。
【００３０】
実施例３
上記塗膜形成成分Ａ９５質量部、白色硅砂（神東陶料（株）製、商品名：カラーサンドホワイト）２．５質量部、黒色硅砂（神東陶料（株）製、商品名：カラーサンドブラック）２．５質量部を混合攪拌して塗料を製造した。
【００３１】
比較例１
上記塗膜形成成分Ａ１０質量部、白色硅砂（神東陶料（株）製、商品名：カラーサンドホワイト）４５質量部、黒色硅砂（神東陶料（株）製、商品名：カラーサンドブラック）４５質量部を混合攪拌して塗料を製造した。
【００３２】
比較例２
上記塗膜形成成分Ａ９９．５質量部、白色硅砂（神東陶料（株）製、商品名：カラーサンドホワイト）０．２質量部、黒色硅砂（神東陶料（株）製、商品名：カラーサンドブラック）０．３質量部を混合攪拌して塗料を製造した。
【００３３】
目視試験
上記実施例１〜３、並びに比較例１及び２の塗料を、スプレー塗装により、アクリル板上、及び離型紙上に乾燥膜厚が２００μｍとなるように塗装して模様塗膜を形成した。スーパーＵＶテスター（岩崎電気（株）製）により、光照射４時間、結露４時間を１サイクルとして、アクリル板上に塗装した塗膜の耐候性を、目視により測定した。また、離型紙上に形成された塗膜を剥離し、その断面を光学顕微鏡により目視することにより、着色粒子表面より塗膜形成成分の表面までの膜厚を測定した。
【００３４】
実施例１〜３、並びに比較例１及び２の塗料の配合量、さらにそれらの塗料により形成された塗膜の目視試験の結果が、以下の表１に示される。
【表１】

耐候性の評価（目視により判定）
○：塗膜に異常はない
△：塗膜に若干の変色及び艶引けがあるが実用上問題なし
×：塗膜にひび割れが発生
意匠性（目視により判定）
○：多彩感がある
×：多彩感に乏しい
【００３５】
表１から明らかなように、全質量に対して１〜６０質量％の着色粒子を含む本発明の実施例１〜３の塗料により形成された模様塗膜は、着色粒子を９０質量％含む比較例１記載の塗料で形成された塗膜と比較して耐候性に優れ、且つ着色粒子を０．５質量％含む比較例２に記載の塗料で形成された塗膜と比較して意匠性の点で優れていることが明らかである。
【００３６】
以下に、着色粒子がゲル状の着色粒子である実施例を示す。
【００３７】
塗膜形成成分Ｃの作製
以下の組成を混合攪拌して、塗膜形成成分Ｃを作製した：

【００３８】
塗膜形成成分Ｄの作製
以下の組成を混合攪拌して、塗膜形成成分Ｄを作製した：

【００３９】
模様塗膜中のゲル状の着色粒子を製造するために、はじめに下記の配合の成分を混合攪拌して着色塗料ｅ〜ｊを製造した。
【表２】

【００４０】
実施例４〜８及び比較例３〜４
塗膜形成成分Ｃ及びＤ、ならびに着色塗料ｅ〜ｊを、以下の表３に記載されるように配合して混合攪拌し、ゲル状の着色粒子を含む塗料を作製した。評価は前記記載の実施例と同様に実施した。
【表３】

【００４１】
表３から明らかなように、全質量に対して１〜６０質量％のゲル状の着色粒子を含む本発明の実施例４〜８の塗料により形成された模様塗膜は、ゲル状の着色粒子を９０質量％含む比較例３記載の塗料で形成された塗膜と比較して耐候性に優れ、且つゲル状の着色粒子を０．５質量％含む比較例４に記載の塗料で形成された塗膜と比較して意匠性の点で優れていることが明らかである。
【００４２】
【発明の効果】
本発明によれば、塗膜形成成分と着色粒子とを合わせた全質量に対して、着色粒子を１〜６０質量％含む塗料を使用することにより、前記着色粒子が前記塗膜の表面から５μｍの領域には存在せず、５〜１００μｍの領域には少なくとも存在することを特徴とする、耐候性及び意匠性に優れた模様塗膜が形成され、本発明に係る模様塗膜は、クリヤー塗装の必要なく、１回の塗装で形成可能であるという利点を有する。
【図面の簡単な説明】
【図１】本発明に係る模様塗膜を模式的に示した断面図である。
【符号の説明】
１．模様塗膜
１ａ．着色粒子
１ｂ．塗膜形成成分
２．基材[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a patterned coating film having excellent water resistance, durability and weather resistance and high designability, and a method for forming the patterned coating film.
[0002]
[Prior art]
A multicolor paint is one in which several colored particles of different colors are suspended and dispersed in an oily or aqueous dispersion medium without being dissolved in the dispersion medium. It is conventionally well-known as a paint having a so-called scattered pattern composed of a combination of spots, drops, grains, and the like, and is also specified in, for example, JIS-K-5667.
[0003]
The multi-color paint film formed by applying the multi-color paint is designed with emphasis on design, so when used on the exterior of buildings or around water, etc. It is easy to cause strange and chalking. Further, the coating film forming component covering the colored particles in the coating film is dissolved by rain or the like when exposed outdoors, deterioration occurs at the interface between the coating film forming component and the colored particles, and peeling is likely to occur. As described above, the multi-colored coating film is inferior in water resistance and durability, and it is difficult to maintain the initial coating state in a severe environment, and the appearance of the formed coating film is deteriorated due to contamination. .
[0004]
As a solution to the above problem, for example, it has been proposed to use an elastic coating material for undercoating of a multi-pattern coating film (for example, see Patent Document 1). According to this method, the efflorescence from the substrate can be prevented, but since the synthetic resin emulsion encapsulated in the gelling film of the hydrophilic colloid-forming substance is used as the multicolored paint, the colored particles are not formed at the time of forming the coating film. It did not fuse completely and peeled off due to cracks between the colored particles with time, and it was not possible to maintain the initial coating state.
[0005]
Recently, a method of forming a colorful paint film having excellent water resistance, durability and design by applying a clear paint after applying a colorful paint containing one or more kinds of specific colored particles. Has been proposed (for example, see Patent Document 2).
[0006]
[Patent Document 1]
JP-B-62-87285 [Patent Document 2]
JP-A-9-57186
[Problems to be solved by the invention]
However, in this method, after forming a multi-colored coating film, the clear coating is applied over the multi-colored coating film, so that the coating process is increased at least once, and there is a problem that the coating process is troublesome and complicated. Further, there is a problem that the thickness of the clear coating film varies depending on the skill of the painter, and the required design appearance cannot be achieved. In addition, there is a possibility that a clear coating film is not formed on the multicolored coating film.
[0008]
Therefore, the present invention does not require a complicated coating process, and can be easily formed by coating a paint without relying on the skill of a painter, is excellent in water resistance, durability and weather resistance, and It is an object of the present invention to provide a pattern coating film including a colorful pattern coating film having a high design property and a method for forming the same.
[0009]
[Means for Solving the Problems]
The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, by adjusting the mass ratio of the colored particles to the film-forming components, the colored particles are present in a region of 5 μm from the surface of the coated film. However, it was found that a pattern coating film characterized by being present at least in a region of 5 to 100 μm was formed by one coating. Since the layer having a thickness of 5 to 100 μm can function as a clear layer, according to the present invention, it is possible to form a target pattern coating film in a single coating without the need for clear coating. Has advantages.
[0010]
Therefore, in the patterned coating film of the present invention, in the patterned coating film containing the colored particles, the colored particles are not present in a region of 5 μm from the surface of the coated film, but are present at least in a region of 5 to 100 μm. It is characterized by.
Further, the pattern coating film of the present invention may have a base layer formed of an enamel paint.
Here, the pattern coating film of the present invention preferably contains an ultraviolet absorber and / or a light stabilizer.
[0011]
The method for forming a patterned coating film according to the present invention is characterized in that the coating film is formed using a paint containing 1 to 60% by mass of colored particles.
Further, it is preferable to form a coating film on a base layer made of an enamel paint with a paint containing 1 to 60% by weight of colored particles.
Here, it is desirable that the colored particles are in a gel state.
Further, it is desirable to include an ultraviolet absorber and / or a light stabilizer in the gel colored particles.
Further, it is desirable that the paint is an emulsion paint.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
The patterned coating film of the present invention will be described with reference to FIG. The patterned coating film (1) according to the present invention is formed on a substrate (2), and includes colored particles (1a) in a coating film forming component (1b). The colored particles (1a) are of one or more colors, and the colored particles (1a) are not present in a region of 5 μm from the surface of the coating film (1), but are present at least in a region of 5 to 100 μm. It is characterized by.
[0013]
The “coating film forming component (1b)” in the present invention refers to a component containing a resin that forms the coating film (1) according to the present invention, and examples of the resin component include an acrylic resin, a styrene-acrylic resin, and an acryl-silicone. Resin, vinyl acetate resin, ethylene-vinyl acetate resin and the like can be used.
[0014]
The “colored particles (1a)” in the present invention is for giving a pattern to the coating film (1) according to the present invention, and refers to particles colored in any range of 0.1 to 3 mm in particle size. For example, known aggregates such as silica sand, quartz, ground ceramic particles, calcium carbonate, mica, resin beads, and / or gel-like colored particles may be used. Further, the coating film (1) of the present invention may include a colored particle (1a) of at least two colors, and may constitute a multicolored coating film.
[0015]
The patterned coating film (1) according to the present invention is encapsulated with a gelling film of a hydrophilic colloid-forming substance in an aqueous dispersion medium (the dispersion medium may contain a synthetic resin emulsion as a film-forming component). It is preferable to use a coating composed of a synthetic resin emulsion of a type in which gelled colored particles are dispersed.
[0016]
The “gel state” in the present invention refers to a hydrophilic colloid-forming substance such as a cellulose derivative or polyvinyl alcohol and an insolubilizing agent (gelling agent) such as boron or magnesium montmorillonite capable of insolubilizing the colloidal substance. It means a state in which a kind of three-dimensional network is formed.
[0017]
Therefore, the gel-like colored particles encapsulated by the gelling film can be produced by a known technique for insolubilizing a hydrophilic colloid, and a colored resin emulsion containing a hydrophilic colloid-forming substance is converted into a gelling agent. It can be prepared by mixing and dispersing in an aqueous medium containing the same.
[0018]
Since the colored particles do not exist in the area of 5 μm from the surface of the pattern coating, even under severe environmental conditions, peeling due to cracks between the film forming component and the coloring particles is less likely to occur, improving the weather resistance of the coating. It is possible to do. In addition, since the colored particles are present in a region of 5 to 100 μm from the surface of the pattern coating, the coloring particles in the pattern coating are not covered with the thick film forming component, and the color becomes clear from the outside. It is possible to form a patterned coating film with improved design. Therefore, it is most appropriate that the colored particles are not present in a region of 5 μm from the surface of the coating film according to the present invention but are present at least in a region of 5 to 100 μm from the viewpoint of weather resistance and design of the coating film. is there.
[0019]
In the present invention, the colored particles are used in the present invention by using a paint in which the mass ratio of the colored particles to the paint containing the coating film forming component (1b) and the colored particles (1a) is 1 to 60% by mass. It does not exist in a region of 5 μm from the surface of such a coating film, but at least exists in a region of 5 to 100 μm.
[0020]
The pattern coating film (1) according to the present invention may contain an ultraviolet absorber and / or a light stabilizer. Furthermore, the ultraviolet absorber and / or the light stabilizer may be present in the gel-like colored particles (1a). As used herein, the term “ultraviolet absorber and / or light stabilizer” includes known ultraviolet absorbers and / or light stabilizers. Examples of the ultraviolet absorber include benzophenone-based, cyanoacrylate-based, and oxalic acid. Various ultraviolet absorbers such as anilide, benzotriazole and triazine can be used, and various radical scavengers can be used as a light stabilizer.
[0021]
Specific examples of the ultraviolet absorber contained in the pattern coating film according to the present invention include a benzotriazole-based ultraviolet absorber manufactured by Ciba Specialty Chemicals Co., Ltd., product name: TINUVIN1130, and the like. Specific examples of the agent include a hindered amine-based stabilizer manufactured by Ciba Specialty Chemicals Co., Ltd., product name: TINUVIN292.
[0022]
Either one of the ultraviolet absorber and the light stabilizer may be used, or both may be used in combination, but when the ultraviolet absorber and the light stabilizer are used in combination, the pattern coating film containing these is high. It is preferable because weather resistance can be achieved.
[0023]
Examples of the substrate (2) coated with the pattern coating film (1) according to the present invention include architectural boards such as concrete boards, asbestos cement boards, hard boards, gypsum boards, asbestos perlite boards, calcium silicate boards, and the like. A wide range of materials including plastics such as ABS resin, styrene resin, acrylic resin, vinyl chloride resin, melamine resin and polyester resin, metals such as iron plate, aluminum plate, tin plate and galvanized plate, wood, synthetic wood glass and ceramic No. However, when the pattern coating film of the present invention is applied on a building substrate, after preparing an undercoating film or an intermediate coating film on the substrate, the pattern coating film of the present invention is applied on the upper part thereof. May be. Further, the pattern coating film of the present invention may have a base layer formed of an enamel paint.
[0024]
The most effective coating method for obtaining the patterned coating film (1) according to the present invention is spray coating, but the coating method is not limited thereto, and a known coating method such as a brush, a roller, and a curtain flow coater may be applied. By doing so, it is also possible to obtain unique patterns that take advantage of the features of each coating method.
[0025]
【Example】
Specific examples of the present invention will be described in detail with reference to the following examples. In addition, the compounding amounts described below all indicate parts by mass.
[0026]
Preparation of Film Forming Component A As an aqueous emulsion, 95 parts by mass of Polytron E-360 (manufactured by Asahi Kasei Corporation) containing 45% by mass of an acrylic resin and a film-forming aid (manufactured by Eastman Chemical Japan Co., Ltd., trade name: Texanol ) 5 parts by weight were mixed.
[0027]
Preparation of coating film forming component B As an aqueous emulsion, 94 parts by mass of Polytron E-360 manufactured by Asahi Kasei Corporation containing 45% by mass of an acrylic resin and a film-forming auxiliary agent (manufactured by Eastman Chemical Japan Co., Ltd., trade name: Texanol) ) 5 parts by mass, 0.5 parts by mass of TINUVIN 1130 (manufactured by Ciba Specialty Chemicals) as an ultraviolet absorber, and 0.5 parts by mass of TINUVIN 292 (manufactured by Ciba Specialty Chemicals) as a light stabilizer. Mixed.
[0028]
Example 1
50 parts by mass of the above-mentioned film-forming component A, 25 parts by mass of white silica sand (trade name: Color Sand White, manufactured by Jindo Ceramics Co., Ltd.), black silica sand (trade name: Color Sand Black, manufactured by Jinto Ceramics Co., Ltd.) ) 25 parts by mass were mixed and stirred to produce a paint.
[0029]
Example 2
50 parts by mass of the above-mentioned coating film forming component B, 25 parts by mass of white silica sand (manufactured by Jindo Toilei Co., Ltd., trade name: color sand white), black silica sand (manufactured by Jinto Toilei Co., Ltd., trade name: color sand black ) 25 parts by mass were mixed and stirred to produce a paint.
[0030]
Example 3
95 parts by mass of the above-mentioned film-forming component A, 2.5 parts by mass of white silica sand (manufactured by Jinto Ceramics Co., Ltd., trade name: color sand white), black silica sand (manufactured by Jinto Ceramics Co., Ltd., trade name: color) (Sand black) 2.5 parts by mass were mixed and stirred to produce a coating material.
[0031]
Comparative Example 1
10 parts by mass of the above-mentioned coating film forming component A, 45 parts by mass of white silica sand (manufactured by Jindo Toilei Co., Ltd., trade name: color sand white), black silica sand (manufactured by Jindo Toilei Co., Ltd., trade name: color sand black ) 45 parts by mass were mixed and stirred to produce a paint.
[0032]
Comparative Example 2
99.5 parts by mass of the above-mentioned coating film forming component A, 0.2 parts by mass of white silica sand (manufactured by Jinto Tohoku Co., Ltd., trade name: color sand white), black silica sand (manufactured by Jinto Tohoku Co., Ltd.) : Color sand black) 0.3 part by mass was mixed and stirred to produce a coating material.
[0033]
Visual test The paints of Examples 1 to 3 and Comparative Examples 1 and 2 were applied by spray coating on an acrylic plate and on release paper so as to have a dry film thickness of 200 μm to form a patterned coating film. . Using a super UV tester (manufactured by Iwasaki Electric Co., Ltd.), the weather resistance of the coating film applied on the acrylic plate was visually measured using light irradiation 4 hours and dew condensation 4 hours as one cycle. Further, the coating film formed on the release paper was peeled off, and the cross section was visually observed with an optical microscope to measure the film thickness from the surface of the colored particles to the surface of the coating film forming component.
[0034]
Table 1 below shows the blending amounts of the paints of Examples 1 to 3 and Comparative Examples 1 and 2, and the results of a visual test of the coating films formed by those paints.
[Table 1]

Evaluation of weather resistance (determined visually)
：: There is no abnormality in the coating film. △: There is slight discoloration and glossiness in the coating film, but there is no practical problem. X: Cracks occur in the coating film.
：: Various feelings X: Poor color feeling [0035]
As is clear from Table 1, the patterned coating films formed by the paints of Examples 1 to 3 of the present invention containing 1 to 60% by mass of the colored particles with respect to the total mass contain 90% by mass of the colored particles. It has better weather resistance than the coating film formed by the coating material described in Example 1, and has design property as compared with the coating film formed by the coating material described in Comparative Example 2 containing 0.5% by mass of colored particles. It is clear that it is superior in this respect.
[0036]
Hereinafter, examples in which the colored particles are gel colored particles will be described.
[0037]
Preparation of Film-Forming Component C The following components were mixed and stirred to prepare a film-forming component C:

[0038]
Preparation of Film-Forming Component D The following components were mixed and stirred to prepare a film-forming component D:

[0039]
In order to produce gel-like colored particles in the patterned coating film, first, components having the following composition were mixed and stirred to produce colored paints ej.
[Table 2]

[0040]
Examples 4 to 8 and Comparative Examples 3 to 4
The coating film forming components C and D and the coloring paints ej were blended and mixed and stirred as shown in Table 3 below to prepare a paint containing gel-like coloring particles. The evaluation was performed in the same manner as in the above-mentioned Examples.
[Table 3]

[0041]
As is clear from Table 3, the patterned coating films formed by the coating materials of Examples 4 to 8 of the present invention containing 1 to 60% by mass of the gel colored particles with respect to the total mass are the gel colored particles. Was formed with the paint described in Comparative Example 4 which was superior to the coating film formed by the paint described in Comparative Example 3 containing 90% by mass and contained 0.5% by mass of gel-like colored particles. It is clear that the film is superior in terms of design as compared with the coating film.
[0042]
【The invention's effect】
According to the present invention, by using a paint containing 1 to 60% by mass of the colored particles with respect to the total mass of the coating film forming component and the colored particles, the colored particles are 5 μm from the surface of the coated film. And a pattern coating excellent in weather resistance and design is formed, wherein the pattern coating according to the present invention is a clear coating. It has the advantage that it can be formed by a single coating without the need for.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view schematically showing a patterned coating film according to the present invention.
[Explanation of symbols]
1. Pattern coating 1a. Colored particles 1b. 1. Film-forming component Base material

Claims

A patterned coating film containing colored particles, wherein the colored particles are not present in a region of 5 μm from the surface of the coated film, but are present at least in a region of 5 to 100 μm.

The patterned coating film according to claim 1, wherein a base layer made of an enamel paint is formed.

The patterned coating film according to claim 1, further comprising an ultraviolet absorber and / or a light stabilizer.

A method for forming a patterned coating film, comprising forming a coating film with a paint containing 1 to 60% by mass of colored particles.

The method for forming a patterned coating film according to claim 4, wherein the coating film is formed with a coating material containing 1 to 60% by weight of colored particles on a base layer made of an enamel coating material.

The method according to claim 4, wherein the colored particles are in a gel state.

The method for forming a patterned coating film according to claim 6, wherein the gel colored particles contain an ultraviolet absorber and / or a light stabilizer.

The method according to any one of claims 4 to 7, wherein the paint is an emulsion paint.