JP2018076405A - Metallic coating composition and coat - Google Patents
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Abstract
Description
本発明は、金属調塗料組成物及び塗膜に関する。 The present invention relates to a metallic paint composition and a coating film.
自動車部品等では、表面に金属調の光沢を有する塗膜を形成することが行われている。従来、前記塗膜を形成する金属調塗料組成物として、光輝性顔料と、アクリル樹脂をグラフト化した繊維素系樹脂と、アクリル樹脂を含むバインダーと、溶剤とを含む塗料組成物が知られている（例えば、特許文献１参照）。 In automobile parts and the like, a coating film having a metallic luster is formed on the surface. Conventionally, as a metallic paint composition for forming the coating film, a paint composition containing a bright pigment, a fiber-based resin grafted with an acrylic resin, a binder containing an acrylic resin, and a solvent is known. (For example, refer to Patent Document 1).
特許文献１記載の金属調塗料組成物では、前記光輝性顔料として蒸着金属膜を粉砕することにより得られた平均粒子径０．１〜３０μｍ、厚さ０．０１〜１μｍの金属片が用いられおり、該光輝性顔料を塗膜中で面方向に配向させることにより金属調光沢を有する塗膜を得ることができるとされている。また、特許文献１記載の金属調塗料組成物では、前記光輝性顔料に、前記アクリル樹脂をグラフト化した繊維素系樹脂を併用することにより、該金属調塗料組成物により形成される塗膜の被塗物に対する密着性を良好にすることができるとされている。 In the metallic paint composition described in Patent Document 1, a metal piece having an average particle diameter of 0.1 to 30 μm and a thickness of 0.01 to 1 μm obtained by pulverizing a deposited metal film as the bright pigment is used. It is said that a coating film having a metallic luster can be obtained by orienting the glitter pigment in the surface direction in the coating film. Moreover, in the metallic paint composition described in Patent Document 1, the coating film formed from the metallic paint composition is used by combining the glitter pigment with a fibrous resin grafted with the acrylic resin. It is said that adhesion to an object can be improved.
しかしながら、特許文献１記載の前記金属調塗料組成物により形成される塗膜では、十分な金属調光沢を得られないことがあり、さらに優れた金属調光沢を有する塗膜を形成することができる金属調塗料組成物が望まれる。 However, in the coating film formed by the metal-tone paint composition described in Patent Document 1, a sufficient metal-tone gloss may not be obtained, and a coating film having an excellent metal-tone gloss can be formed. A metallic paint composition is desired.
本発明は、かかる事情に鑑み、さらに優れた金属調光沢を有する塗膜を形成することができる金属調塗料組成物及び塗膜を提供することを目的とする。 In view of such circumstances, an object of the present invention is to provide a metallic paint composition and a coating film that can form a coating film having a further excellent metallic gloss.
本発明者らは、特許文献１記載の前記金属調塗料組成物により形成される塗膜では、十分な金属調光沢を得られないことがある理由について、鋭意検討した。この結果、本発明者らは、前記光輝性顔料として用いられる金属片が０．０１μｍ（１０ｎｍ）以上の厚さを備えているために塗膜中で乱反射を起こすことがあること、前記アクリル樹脂をグラフト化した繊維素系樹脂を用いているために該光輝性顔料の顔料重量濃度を十分に大きくすることができないことを知見した。 The present inventors diligently studied why the coating film formed from the metallic paint composition described in Patent Document 1 may not have sufficient metallic gloss. As a result, the present inventors have found that the metal piece used as the glitter pigment has a thickness of 0.01 μm (10 nm) or more, and therefore may cause irregular reflection in the coating film, the acrylic resin It has been found that the pigment weight concentration of the glittering pigment cannot be sufficiently increased because the fiber-based resin grafted with is used.
本発明者らは前記知見に基づいてさらに検討を進めた結果、前記光輝性顔料として用いられる金属片の厚さをさらに薄くすることにより、該光輝性顔料を含む金属調塗料組成物により形成される塗膜中における該金属片による乱反射を低減できることを見出した。また、前記光輝性顔料として用いられる金属片の厚さをさらに薄くすることにより、前記アクリル樹脂をグラフト化した繊維素系樹脂を用いることなく、該光輝性顔料を含む金属調塗料組成物により形成される塗膜が被塗物に対して良好な密着性を得ることができ、この結果、該光輝性顔料の顔料重量濃度を大きくすることができ、さらに優れた金属調光沢を得ることができることを見出した。 As a result of further investigation based on the above knowledge, the present inventors have further reduced the thickness of the metal piece used as the glitter pigment, thereby forming a metallic paint composition containing the glitter pigment. It was found that irregular reflection by the metal pieces in the coating film can be reduced. Further, by further reducing the thickness of the metal piece used as the glitter pigment, it is formed from a metallic paint composition containing the glitter pigment without using a fibrous resin grafted with the acrylic resin. The coated film can obtain good adhesion to the object to be coated, and as a result, the pigment weight concentration of the glitter pigment can be increased, and an excellent metallic gloss can be obtained. I found.
そこで、本発明の金属調塗料組成物は、（メタ）アクリル樹脂を含むバインダー樹脂と、該バインダー樹脂に分散された光輝性顔料と、溶剤とを含む金属調塗料組成物であって、該光輝性顔料は、粒子径が５〜３０μｍの範囲にあり、かつ、厚さが５ｎｍ以上１０ｎｍ未満の範囲にある金属片からなり、該金属片の顔料重量濃度（ＰＷＣ）が３０〜７０質量％の範囲にあることを特徴とする。 Accordingly, the metallic paint composition of the present invention is a metallic paint composition comprising a binder resin containing a (meth) acrylic resin, a glitter pigment dispersed in the binder resin, and a solvent. The pigment has a particle size in the range of 5 to 30 μm and a thickness of 5 nm or more and less than 10 nm. The pigment weight concentration (PWC) of the metal piece is 30 to 70% by mass. It is in the range.
本発明の金属調塗料組成物によれば、前記光輝性顔料を構成する前記金属片の粒子径及び厚さが前記範囲にあることにより、該金属調塗料組成物により形成される塗膜の被塗物に対する密着性を良好とすることができ、該塗膜中で該金属片の面方向における配向性を優れたものとして、該金属片による乱反射を低減することができる。 According to the metallic paint composition of the present invention, when the particle size and thickness of the metal piece constituting the glitter pigment are in the above range, the coating of the coating film formed by the metallic paint composition is performed. Adhesiveness to the coating can be improved, and the irregular reflection by the metal piece can be reduced by making the orientation in the surface direction of the metal piece excellent in the coating film.
前記金属片の粒子径が３０μｍを超えるか、厚さが１０ｎｍ以上であるときには、前記金属調塗料組成物により形成される塗膜の被塗物に対する密着性が低下し、該塗膜中で該金属片により乱反射が起きやすくなる。一方、前記金属片の粒子径を５μｍ未満とするか、厚さを５ｎｍ未満とすることは技術的に困難である。 When the particle size of the metal piece exceeds 30 μm or the thickness is 10 nm or more, the adhesion of the coating film formed by the metallic paint composition to the object to be coated decreases, Diffuse reflection easily occurs due to the metal piece. On the other hand, it is technically difficult to make the particle size of the metal piece less than 5 μm or make the thickness less than 5 nm.
また、本発明の金属調塗料組成物によれば、前記金属片の顔料重量濃度（ＰＷＣ）が前記範囲にあることにより、該金属調塗料組成物により形成される塗膜において、優れた金属調光沢を得ることができる。 In addition, according to the metal-tone paint composition of the present invention, when the pigment weight concentration (PWC) of the metal piece is in the above range, an excellent metal-tone paint is formed in a coating film formed from the metal-tone paint composition. Gloss can be obtained.
前記金属片のＰＷＣが３０質量％未満では、前記金属調塗料組成物により形成される塗膜において、優れた金属調光沢を得ることができない。また、前記金属片のＰＷＣが７０質量％を超えると、前記金属調塗料組成物により形成される塗膜の被塗物に対する密着性が低下する。 When the PWC of the metal piece is less than 30% by mass, an excellent metallic gloss cannot be obtained in the coating film formed from the metallic paint composition. Moreover, when PWC of the said metal piece exceeds 70 mass%, the adhesiveness with respect to the to-be-coated object of the coating film formed with the said metal-tone coating composition will fall.
本発明の金属調塗料組成物において、前記金属片は厚さに対する粒子径の比（粒子径／厚さ）で示されるアスペクト比が１０００〜６０００の範囲にあることが好ましい。本発明の金属調塗料組成物は、前記金属片の前記アスペクト比が前記範囲にあることにより、該金属調塗料組成物により形成される前記塗膜中で、該金属片の面方向における配向性をさらに優れたものとすることができる。 In the metallic paint composition of the present invention, the metal piece preferably has an aspect ratio in the range of 1000 to 6000, which is represented by a ratio of particle diameter to thickness (particle diameter / thickness). The metallic paint composition of the present invention has an orientation in the surface direction of the metal piece in the coating film formed by the metallic paint composition when the aspect ratio of the metal piece is in the range. Can be further improved.
また、本発明の金属調塗料組成物において、前記金属片は金属の粉砕物であることが好ましく、アルミニウムからなることがさらに好ましい。 In the metallic paint composition of the present invention, the metal piece is preferably a metal pulverized product, and more preferably made of aluminum.
次に、本発明の塗膜は、被塗物上に形成された下塗り塗膜層と、該下塗り塗膜層上に形成された金属調塗膜層と、該金属調塗膜層上に形成されたクリヤー塗膜層とからなる塗膜であって、該金属調塗膜層が本発明の金属調塗料組成物からなることを特徴とする。 Next, the coating film of the present invention is formed on the undercoat coating layer formed on the object to be coated, the metallic coating layer formed on the undercoating coating layer, and the metallic coating layer. A coating film comprising a clear coating film layer, wherein the metallic coating film layer comprises the metallic coating composition of the present invention.
本発明の塗膜によれば、前記金属調塗膜層が本発明の金属調塗料組成物からなることにより優れた金属調光沢を得ることができる。また、本発明の塗膜によれば、前記下塗り塗膜層により前記被塗物に対して優れた密着性を得ることができ、前記クリヤー塗膜層により前記金属調塗膜層に対して優れた保護効果を得ることができる。 According to the coating film of the present invention, an excellent metallic gloss can be obtained when the metallic coating film layer comprises the metallic coating composition of the present invention. Further, according to the coating film of the present invention, it is possible to obtain excellent adhesion to the object to be coated by the undercoat coating layer, and it is excellent to the metal-tone coating layer by the clear coating layer. A protective effect can be obtained.
本発明の塗膜において、前記金属調塗膜層は、膜厚が５０〜５００ｎｍの範囲にあることが好ましい。前記金属調塗膜層は、膜厚が前記範囲にあることにより、本発明の塗膜に優れた金属調光沢を付与することができる。前記金属調塗膜層は、膜厚が５０ｎｍ未満では相対的に前記光輝性顔料の含有量が低下し、十分な金属調光沢を得ることができないことがある。また、前記金属調塗膜層は、膜厚が５００ｎｍを超えると該金属調塗膜層の凝集破壊による密着不良が発生するという不都合がある。 The coating film of this invention WHEREIN: It is preferable that the said metal-tone coating film layer exists in the range of 50-500 nm in film thickness. When the film thickness is in the above range, the metal-tone coating film layer can impart excellent metal-tone gloss to the coating film of the present invention. If the film thickness of the metallic tone coating layer is less than 50 nm, the content of the glitter pigment is relatively lowered, and sufficient metallic gloss may not be obtained. Moreover, when the film thickness of the metal-tone coating layer exceeds 500 nm, there is an inconvenience that poor adhesion due to cohesive failure of the metal-tone coating layer occurs.
前記下塗り塗膜層及び前記クリヤー塗膜層は、前記（メタ）アクリル樹脂の水酸基と反応して化学結合を生成可能な官能基を備える樹脂を含むことが好ましく、この結果、前記金属調塗膜層と強固に結合することができ、層間剥離を防止することができる。前記（メタ）アクリル樹脂の水酸基と反応して化学結合を生成可能な官能基を備える樹脂としては、例えば、イソシアネート樹脂又はメラミン樹脂を用いることができる。 The undercoat coating layer and the clear coating layer preferably contain a resin having a functional group capable of generating a chemical bond by reacting with a hydroxyl group of the (meth) acrylic resin. The layer can be firmly bonded, and delamination can be prevented. As the resin having a functional group capable of reacting with the hydroxyl group of the (meth) acrylic resin to generate a chemical bond, for example, an isocyanate resin or a melamine resin can be used.
また、本発明の塗膜において、前記下塗り塗膜層は、膜厚が５〜４０μｍの範囲にあることが好ましい。前記下塗り塗膜層の膜厚が５μｍ未満では、前記被塗物に対して十分な密着性を得ることができないことがあり、素材の欠点を隠蔽できずムラのように見えることもある。また、前記下塗り塗膜層の膜厚が４０μｍを超えると垂直面での垂れやエッジに額縁が生じるという不都合がある。 Moreover, the coating film of this invention WHEREIN: It is preferable that the said undercoat coating film layer exists in the range of 5-40 micrometers in film thickness. When the film thickness of the undercoat coating layer is less than 5 μm, sufficient adhesion to the object to be coated may not be obtained, and the defects of the material cannot be concealed and may appear uneven. Moreover, when the film thickness of the said undercoat coating film layer exceeds 40 micrometers, there exists a problem that a frame will arise in the dripping and edge at a perpendicular surface.
また、本発明の塗膜において、前記クリヤー塗膜層は、膜厚が２０〜５０μｍの範囲にあることが好ましい。前記クリヤー塗膜層の膜厚が２０μｍ未満では、前記金属調塗膜層に対して十分な保護効果を得ることができないことがある。また、前記クリヤー塗膜層の膜厚が５０μｍを超えると垂直面での垂れやエッジに額縁が生じるという不都合がある。 Moreover, in the coating film of this invention, it is preferable that the said clear coating film layer exists in the range of 20-50 micrometers in film thickness. If the film thickness of the clear coating layer is less than 20 μm, a sufficient protective effect may not be obtained for the metallic coating layer. Further, when the film thickness of the clear coating layer exceeds 50 μm, there is a disadvantage that a frame is formed on the sag or edge on the vertical surface.
次に、添付の図面を参照しながら本発明の実施の形態についてさらに詳しく説明する。 Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.
図１に示すように、本実施形態の塗膜１は、自動車の内外装部品等の樹脂又は金属からなる被塗物２上に形成された下塗り塗膜層３と、下塗り塗膜層３上に形成された金属調塗膜層４と、金属調塗膜層４上に形成されたクリヤー塗膜層５とからなる。 As shown in FIG. 1, the coating film 1 of the present embodiment includes an undercoat film layer 3 formed on an object 2 made of resin or metal such as an interior / exterior part of an automobile, and an undercoat film layer 3. And a clear coating layer 5 formed on the metallic coating layer 4.
塗膜１において、金属調塗膜層４は、金属調塗料組成物からなり、５０〜５００ｎｍの範囲の膜厚を備えている。前記金属調塗料組成物は、（メタ）アクリル樹脂を含むバインダー樹脂と、該バインダー樹脂に分散された光輝性顔料と、溶剤とを含む。 In the coating film 1, the metal tone coating film layer 4 consists of a metal tone coating composition, and is provided with the film thickness of the range of 50-500 nm. The metallic paint composition includes a binder resin containing a (meth) acrylic resin, a glitter pigment dispersed in the binder resin, and a solvent.
前記金属調塗料組成物において、前記光輝性顔料は、粒子径が５〜３０μｍの範囲にあり、かつ、厚さが５ｎｍ以上１０ｎｍ未満の範囲にある金属片からなり、該金属片の顔料重量濃度（ＰＷＣ）は３０〜７０質量％の範囲にある。また、金属調塗料組成物において、前記溶剤としては、前記（メタ）アクリル樹脂を溶解できるものであればどのようなものであってもよく、例えば、酢酸エチル、酢酸ブチル、メチルエチルケトン、メチルイソブチルケトン、トルエン、キシレン等を挙げることができる。 In the metallic paint composition, the glitter pigment comprises a metal piece having a particle diameter in the range of 5 to 30 μm and a thickness in the range of 5 nm to less than 10 nm, and the pigment weight concentration of the metal piece (PWC) is in the range of 30-70% by weight. In the metallic paint composition, the solvent may be any solvent as long as it can dissolve the (meth) acrylic resin, for example, ethyl acetate, butyl acetate, methyl ethyl ketone, methyl isobutyl ketone. , Toluene, xylene and the like.
前記光輝性顔料を構成する前記金属片としては、例えば、アルミニウム等の金属の粉砕物を用いることができ、該金属片は厚さに対する粒子径の比（粒子径／厚さ）で示されるアスペクト比が１０００〜６０００の範囲にある。 As the metal piece constituting the glitter pigment, for example, a pulverized product of metal such as aluminum can be used. The metal piece has an aspect represented by a ratio of particle diameter to particle thickness (particle diameter / thickness). The ratio is in the range of 1000-6000.
また、塗膜１において、下塗り塗膜層３は、金属調塗膜層４のバインダー樹脂である（メタ）アクリル樹脂の水酸基と反応して化学結合を生成可能な官能基を備える樹脂からなり、５〜４０μｍの範囲の膜厚を備えている。また、塗膜１において、クリヤー塗膜層５は、金属調塗膜層４のバインダー樹脂である（メタ）アクリル樹脂の水酸基と反応して化学結合を生成可能な官能基を備える樹脂からなり、２０〜５０μｍの範囲の膜厚を備えている。 Moreover, in the coating film 1, the undercoat coating film layer 3 consists of resin provided with the functional group which can react with the hydroxyl group of the (meth) acrylic resin which is a binder resin of the metal-tone coating film layer 4, and can produce | generate a chemical bond, The film thickness is in the range of 5 to 40 μm. Moreover, in the coating film 1, the clear coating film layer 5 consists of resin provided with the functional group which can react with the hydroxyl group of the (meth) acrylic resin which is a binder resin of the metal-tone coating film layer 4, and can produce | generate a chemical bond, The film thickness is in the range of 20 to 50 μm.
下塗り塗膜層３又はクリヤー塗膜層５を形成する前記（メタ）アクリル樹脂の水酸基と反応して化学結合を生成可能な官能基を備える樹脂としては、イソシアネート樹脂又はメラミン樹脂を挙げることができる。 Examples of the resin having a functional group capable of generating a chemical bond by reacting with the hydroxyl group of the (meth) acrylic resin forming the undercoat coating layer 3 or the clear coating layer 5 include an isocyanate resin or a melamine resin. .
次に、本発明の実施例及び比較例について説明する。 Next, examples and comparative examples of the present invention will be described.
〔実施例１〕
本実施例では、まず、アルミニウムを粉砕してなる平均粒子径１０〜１５μｍ、厚さ５〜１０ｎｍの金属片を、不揮発分２質量％のアクリル樹脂溶液の該不揮発分に対し、１：１の質量比で混合して主剤とし、該主剤と溶剤としての酢酸ブチルとを１：１の質量比で混合して金属調塗料組成物を調製した。
[Example 1]
In this example, first, a metal piece having an average particle diameter of 10 to 15 μm and a thickness of 5 to 10 nm obtained by pulverizing aluminum is 1: 1 with respect to the nonvolatile content of the acrylic resin solution having a nonvolatile content of 2% by mass. A metallic paint composition was prepared by mixing at a mass ratio to obtain a main agent, and mixing the main agent and butyl acetate as a solvent at a mass ratio of 1: 1.
次に、被塗物２としてのＡＢＳ樹脂素材上に黒色の下塗り塗料を塗布し、室温で５分放置した後、８０℃の温度で３０分間加熱乾燥することにより、膜厚１０〜１５μｍの下塗り塗膜層３を形成した。前記下塗り塗料としては、武蔵塗料株式会社製エコハイウレックスＶＪ（商品名）、品番：ＥＣＶＪ６２２を主剤とし、該主剤と、指定された硬化剤と、指定された溶剤とを１０：１：１０の質量比で混合したものを用いた。 Next, a black undercoat paint is applied on the ABS resin material as the object 2 to be coated, left at room temperature for 5 minutes, and then heated and dried at a temperature of 80 ° C. for 30 minutes. A coating layer 3 was formed. As the undercoat, the main ingredient is Eco High Urex VJ (trade name) manufactured by Musashi Paint Co., Ltd., product number: ECVJ622, and the main agent, the designated curing agent, and the designated solvent are 10: 1: 10. What was mixed by mass ratio was used.
次に、下塗り塗膜層３の上に本実施例で得られた金属調塗料組成物を塗布し、室温で５分放置した後、８０℃の温度で３０分間加熱乾燥することにより、膜厚１００〜１５０ｎｍの金属調塗膜層４を形成した。 Next, the metallic paint composition obtained in this example was applied on the undercoat coating layer 3 and allowed to stand at room temperature for 5 minutes, followed by heat drying at 80 ° C. for 30 minutes to obtain a film thickness. A metal-tone coating film layer 4 having a thickness of 100 to 150 nm was formed.
次に、金属調塗膜層４の上にクリヤー塗料を塗布し、室温で５分放置した後、８０℃の温度で３０分間加熱乾燥することにより、膜厚２０〜２５μｍのクリヤー塗膜層５を形成し、下塗り塗膜層３、金属調塗膜層４、クリヤー塗膜層５からなる塗膜１を形成した。前記クリヤー塗料としては、武蔵塗料株式会社製ＩＫＹ（商品名）、品番：ＭＰＣ−（ＳＰ１６−１３５３９）を主剤とし、該主剤と、指定された硬化剤と、指定された溶剤とを４：１：４の質量比で混合したものを用いた。 Next, a clear paint is applied on the metallic paint film layer 4 and allowed to stand at room temperature for 5 minutes, followed by heating and drying at 80 ° C. for 30 minutes, whereby a clear paint film layer 5 having a film thickness of 20 to 25 μm is obtained. A coating film 1 comprising an undercoat coating film layer 3, a metal-tone coating film layer 4, and a clear coating film layer 5 was formed. As the clear paint, IKY (trade name) manufactured by Musashi Paint Co., Ltd., product number: MPC- (SP16-13539) is used as a main agent, and the main agent, a specified curing agent, and a specified solvent are used in a ratio of 4: 1. : A mixture with a mass ratio of 4 was used.
次に、本実施例で得られた塗膜１の光輝感及び粒子感について、モニター１０人の目視による官能試験で評価した。塗膜１の光輝感は、「ある」を５点、「少しある」を３点、「殆どない」を１点とし、粒子感は、「殆どない」を５点、「少しある」を３点、「ある」を１点とし、それぞれモニター１０人の平均値をその指標とした。結果を表１に示す。 Next, the glitter feeling and particle feeling of the coating film 1 obtained in this example were evaluated by a sensory test with 10 monitors visually. The glittering feeling of the coating film 1 is 5 points for “A”, 3 points for “A little”, and 1 point for “Little”, and the particle feeling is 5 for “Little” and 3 for “A little”. The score “Aru” was 1 point, and the average value of 10 monitors was used as the index. The results are shown in Table 1.
〔実施例２〕
本実施例では、被塗物２としてのＰＰ樹脂素材上にグレー色のプライマー塗料を塗布し、室温で５分放置することにより、膜厚１０〜１５μｍのプライマー塗膜層（図示せず）を形成し、該プライマー塗膜層上に下塗り塗膜層３を形成した以外は、実施例１と全く同一にして塗膜１を形成した。前記プライマー塗料としては、武蔵塗料株式会社製ＥＣＯ ＰＡＮＵＣＯ ＰＰ（商品名）、品番：ＥＣ−ＳＧ８１０を主剤とし、該主剤と、指定された溶剤とを１０：７の質量比で混合したものを用いた。
[Example 2]
In this embodiment, a primer coating layer (not shown) having a film thickness of 10 to 15 μm is formed by applying a gray primer coating on the PP resin material as the object 2 and leaving it at room temperature for 5 minutes. A coating film 1 was formed in exactly the same manner as in Example 1 except that the primer coating film layer 3 was formed on the primer coating film layer. As the primer paint, ECO PANUCO PP (trade name) manufactured by Musashi Paint Co., Ltd., product number: EC-SG810 is used as a main agent, and a mixture of the main agent and a specified solvent in a mass ratio of 10: 7 is used. It was.
次に、本実施例で得られた塗膜１の光輝感及び粒子感について、実施例１と全く同一にして評価した。結果を表１に示す。 Next, the glitter feeling and particle feeling of the coating film 1 obtained in this example were evaluated in the same manner as in Example 1. The results are shown in Table 1.
〔比較例１〕
本比較例では、実施例１で用いたものと同一のＡＢＳ樹脂素材を用い、まず、被塗物２上にシルバーメタリック塗料を塗布し、室温で５分放置することにより、膜厚２０〜２５μｍの金属調塗膜層４を形成した。前記シルバーメタリック塗料としては、大日本塗料株式会社製アクリタン１０００（商品名）を主剤とし、該主剤と、指定された硬化剤と、指定された溶剤とを１０：１：５の質量比で混合したものを用いた。
[Comparative Example 1]
In this comparative example, the same ABS resin material as that used in Example 1 was used. First, a silver metallic paint was applied onto the article 2 and left at room temperature for 5 minutes, so that the film thickness was 20 to 25 μm. Metallic coating layer 4 was formed. As the silver metallic paint, Acrytan 1000 (trade name) manufactured by Dainippon Paint Co., Ltd. is used as a main agent, and the main agent, a specified curing agent, and a specified solvent are mixed at a mass ratio of 10: 1: 5. A thing was used.
次に、金属調塗膜層４の上にクリヤー塗料を塗布し、室温で５分放置した後、８０℃の温度で３０分間加熱乾燥することにより、膜厚２０〜２５μｍのクリヤー塗膜層５を形成し、金属調塗膜層４、クリヤー塗膜層５からなる塗膜１を形成した。前記クリヤー塗料としては、大日本塗料株式会社製Ｕトップコートクリヤー（商品名）を主剤とし、該主剤と、指定された硬化剤と、指定された溶剤とを１００：１５：６０の質量比で混合したものを用いた。 Next, a clear paint is applied on the metallic paint film layer 4 and allowed to stand at room temperature for 5 minutes, followed by heating and drying at 80 ° C. for 30 minutes, whereby a clear paint film layer 5 having a film thickness of 20 to 25 μm is obtained. A coating film 1 composed of a metallic coating film layer 4 and a clear coating film layer 5 was formed. As the clear paint, U Top Coat Clear (trade name) manufactured by Dainippon Paint Co., Ltd. is used as a main agent, and the main agent, a specified curing agent, and a specified solvent are used in a mass ratio of 100: 15: 60. A mixture was used.
次に、本比較例で得られた塗膜１の光輝感及び粒子感について、実施例１と全く同一にして評価した。結果を表１に示す。 Next, the glitter feeling and particle feeling of the coating film 1 obtained in this comparative example were evaluated in the same manner as in Example 1. The results are shown in Table 1.
〔比較例２〕
本比較例では、比較例１で用いたシルバーメタリック塗料に代えて、光輝度シルバー塗料を用い、膜厚８〜１０μｍの金属調塗膜層４を形成した以外は、比較例１と全く同一にして金属調塗膜層４、クリヤー塗膜層５からなる塗膜１を形成した。前記光輝度シルバー塗料としては、大日本塗料株式会社製アクリタンＭＹ−５１／ＳＳＣＭ２００（商品名）を主剤とし、該主剤と、指定された硬化剤と、指定された溶剤とを１００：５：５０の質量比で混合したものを用いた。
[Comparative Example 2]
In this comparative example, in place of the silver metallic paint used in Comparative Example 1, a light-intensity silver paint was used, and the same as in Comparative Example 1 except that a metal-tone coating film layer 4 having a thickness of 8 to 10 μm was formed. A coating film 1 composed of a metallic coating film layer 4 and a clear coating film layer 5 was formed. As the luminous silver paint, Acrytan MY-51 / SSCM200 (trade name) manufactured by Dainippon Paint Co., Ltd. is used as a main agent, and the main agent, a specified curing agent, and a specified solvent are used at 100: 5: 50. What was mixed by mass ratio of this was used.
次に、本比較例で得られた塗膜１の光輝感及び粒子感について、実施例１と全く同一にして評価した。結果を表１に示す。 Next, the glitter feeling and particle feeling of the coating film 1 obtained in this comparative example were evaluated in the same manner as in Example 1. The results are shown in Table 1.
表１から、本発明に係る実施例１及び実施例２の塗膜１によれば、従来の市販の塗料により形成された比較例１及び比較例２の塗膜１に比較して、光輝感がある一方、粒子感が無く、優れた金属調光沢を得ることができることが明らかである。 From Table 1, according to the coating film 1 of Example 1 and Example 2 which concerns on this invention, compared with the coating film 1 of the comparative example 1 and the comparative example 2 which were formed with the conventional commercially available coating material, brightness On the other hand, it is clear that there is no particle feeling and an excellent metallic gloss can be obtained.
１…塗膜、 ２…被塗物、 ３…下塗り塗膜層、 ４…金属調塗膜層、 ５…クリヤー塗膜層。 DESCRIPTION OF SYMBOLS 1 ... Coating film, 2 ... To-be-coated object, 3 ... Undercoat coating film layer, 4 ... Metal-tone coating film layer, 5 ... Clear coating film layer.
Claims (10)
該光輝性顔料は、粒子径が５〜３０μｍの範囲にあり、かつ、厚さが５ｎｍ以上１０ｎｍ未満の範囲にある金属片からなり、
該金属片の顔料重量濃度（ＰＷＣ）が３０〜７０質量％の範囲にあることを特徴とする金属調塗料組成物。 A metallic paint composition comprising a binder resin containing a (meth) acrylic resin, a glitter pigment dispersed in the binder resin, and a solvent,
The glitter pigment comprises a metal piece having a particle diameter in the range of 5 to 30 μm and a thickness in the range of 5 nm to less than 10 nm,
A metallic paint composition, wherein the pigment weight concentration (PWC) of the metal piece is in the range of 30 to 70% by mass.
該金属調塗膜層が（メタ）アクリル樹脂を含むバインダー樹脂と、該バインダー樹脂に分散された光輝性顔料とを含み、
該光輝性顔料は、粒子径が５〜３０μｍの範囲にあり、かつ、厚さが５ｎｍ以上１０ｎｍ未満の範囲にある金属片からなり、該金属片の顔料重量濃度（ＰＷＣ）が３０〜７０質量％の範囲にあることを特徴とする塗膜。 A coating comprising: an undercoat coating layer formed on an object to be coated; a metal coating layer formed on the undercoat coating layer; and a clear coating layer formed on the metal coating layer. A membrane,
The metal-tone coating layer contains a binder resin containing a (meth) acrylic resin, and a glitter pigment dispersed in the binder resin,
The glitter pigment is made of a metal piece having a particle diameter in the range of 5 to 30 μm and a thickness in the range of 5 nm to less than 10 nm, and the pigment weight concentration (PWC) of the metal piece is 30 to 70 mass. A coating film characterized by being in the range of%.
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