JP2000038523A - Clear powder coating composition for aluminum wheel - Google Patents
Clear powder coating composition for aluminum wheelInfo
- Publication number
- JP2000038523A JP2000038523A JP20732198A JP20732198A JP2000038523A JP 2000038523 A JP2000038523 A JP 2000038523A JP 20732198 A JP20732198 A JP 20732198A JP 20732198 A JP20732198 A JP 20732198A JP 2000038523 A JP2000038523 A JP 2000038523A
- Authority
- JP
- Japan
- Prior art keywords
- powder coating
- parts
- coating composition
- weight
- acrylic resin
- 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.)
- Pending
Links
Landscapes
- Paints Or Removers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は粉体塗料のもつ作業
性を維持しながら、アルミニウムホイールに対し優れた
耐食性能、付着性能を提供するクリアー粉体塗料組成物
及びクリアー粉体塗料を塗装されたアルミニウムホイー
ルに関するものである。The present invention relates to a clear powder coating composition and a clear powder coating which provide excellent corrosion resistance and adhesion to aluminum wheels while maintaining the workability of the powder coating. Aluminum wheels.
【０００２】[0002]
【従来の技術】粉体塗料はその作業性の良さ、最終利用
効率が非常に高いことによる廃棄物の低減化から年々利
用割合が増加してきている。特に近年、アクリル粉体塗
料の自動車外板トップコートへの適応が検討され始め、
従来のものより薄い膜厚で溶剤塗料並みの高い外観を有
する粉体塗料が開発され、アルミニウムホイールにも用
途拡大され今日に至っている。2. Description of the Related Art The use ratio of powder coating materials has been increasing year by year due to the reduction of waste materials due to their good workability and extremely high final use efficiency. Particularly in recent years, the application of acrylic powder coatings to top coats for automobile outer panels has begun to be studied,
Powder coatings having a film thickness smaller than that of conventional coatings and having an appearance as high as that of solvent coatings have been developed, and their use has been expanded to aluminum wheels to this day.
【０００３】しかしながら自動車外板は通常、カチオン
ＥＤ、プライマーサフェーサー、着色層といった塗り重
ねられた塗膜上にクリアーが塗装されるのに対し、アル
ミニウムホイールでは意匠上、金属光沢を出さなければ
ならず、クロメート処理した基材上に塗装されるケース
が多い。よって、クリアー粉体塗料塗膜には外板と比較
して要求される耐食性能、及び耐衝撃性能ははるかに大
きいものとなる。[0003] However, the outer panel of an automobile is usually coated with a clear coating on a coated film such as a cationic ED, a primer surfacer, and a colored layer, whereas an aluminum wheel is required to have a metallic luster due to its design. In many cases, it is coated on a chromate-treated substrate. Therefore, the required corrosion resistance and impact resistance of the clear powder coating film are much larger than those of the outer plate.
【０００４】また近年、環境保全の観点からクロメート
処理が行われないケースがあり、塗膜に要求される性能
は更に厳しくなってきている。これに対応するため、ク
リアー塗膜厚を厚くすることにより耐食性能の確保が可
能であるが、塗膜厚が厚くなることによる耐衝撃性の低
下、更には樹脂色が出ることによりヘイズの発生があ
り、本来のクリアー塗膜としての機能が発揮できなくな
るという問題がある。In recent years, there have been cases where chromate treatment is not performed from the viewpoint of environmental protection, and the performance required for coating films has become more severe. To cope with this, it is possible to secure corrosion resistance by increasing the thickness of the clear coating, but the impact resistance is reduced by the increase in the thickness of the coating, and haze is generated by the appearance of resin color. There is a problem that the function as the original clear coating film cannot be exhibited.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、透明
感や外観を損なわず十分な耐衝撃性を確保できる塗膜で
優れた耐食性能を有するクリアー粉体塗料組成物及びク
リアー粉体塗料を塗装されたアルミニウムホイールを提
供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a clear powder coating composition and a clear powder coating having excellent corrosion resistance with a coating film capable of securing sufficient impact resistance without impairing the transparency and appearance. To provide painted aluminum wheels.
【０００６】[0006]
【課題を解決するための手段】本発明に従って、アクリ
ル樹脂及硬化剤からなる粉体塗料組成物１００重量部対
し、最大一次粒子径０．５〜７μｍの純度９７％以上の
二酸化珪素を１〜２０重量部、及びシランカップリング
剤を０．１〜４重量部を含有してなるクリアー粉体塗料
組成物が提供される。According to the present invention, 100 parts by weight of a powder coating composition comprising an acrylic resin and a curing agent is mixed with silicon dioxide having a maximum primary particle diameter of 0.5 to 7 .mu.m and a purity of 97% or more. There is provided a clear powder coating composition containing 20 parts by weight and 0.1 to 4 parts by weight of a silane coupling agent.
【０００７】[0007]
【発明の実施の形態】以下に本発明の粉体塗料組成物に
ついて詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION The powder coating composition of the present invention will be described below in detail.
【０００８】本発明で用いるアクリル樹脂としては、オ
キシラン環を官能基として持っているアクリル樹脂であ
るなら特に制限なく使用可能である。アクリル樹脂の合
成方法は当業者にとっては公知である。但し、粉体塗料
として常温（２０〜３０℃）で保管をするために、相転
移温度は４０℃以上のものが好ましく、４５℃以上のも
のはより好ましい。近年、自動車外板用として非常に高
い外観の樹脂が登場している。溶融時の粘度を低減する
ために相転移温度が非常に低いものがあるが、それに見
合った低温での保管が可能であるなら使用可能である。As the acrylic resin used in the present invention, any acrylic resin having an oxirane ring as a functional group can be used without particular limitation. Methods for synthesizing acrylic resins are known to those skilled in the art. However, in order to store at room temperature (20 to 30 ° C.) as a powder coating, the phase transition temperature is preferably 40 ° C. or higher, and more preferably 45 ° C. or higher. In recent years, resins having a very high appearance have appeared for use in automobile outer panels. Some have a very low phase transition temperature in order to reduce the viscosity at the time of melting, but if they can be stored at a correspondingly low temperature, they can be used.
【０００９】なお本発明で使用するアクリル樹脂のエポ
キシ価は、通常８〜２４（×１０-2ｅｑ／１００ｇ）が
好ましく、特に好ましくは９〜２２（×１０-2 ｅｑ／
１００ｇ）、更に好ましくは９〜２０（×１０-2 ｅｑ
／１００ｇ）であることが適当である。硬化剤として
は、従来よりある官能基にオキシラン環を持つアクリル
樹脂含有粉体塗料組成物に於ける硬化剤として使用され
ているものであれば、特に制限なく使用することが可能
である。このような硬化剤としては、デカンジカルボン
酸、デカンジカルボン酸縮合物が挙げられる。The epoxy value of the acrylic resin used in the present invention is usually preferably 8 to 24 (× 10 -2 eq / 100 g), particularly preferably 9 to 22 (× 10 -2 eq / 100 g).
100 g), more preferably 9 to 20 (× 10 −2 eq.)
/ 100 g). As the curing agent, any one can be used without particular limitation as long as it has been conventionally used as a curing agent in an acrylic resin-containing powder coating composition having an oxirane ring in a functional group. Examples of such a curing agent include decane dicarboxylic acid and decane dicarboxylic acid condensate.
【００１０】硬化剤は、エポキシ樹脂に対して通常当量
比で０．７〜１．５が好ましく、特に好ましくは０．８
〜１．３、更に好ましくは０．８〜１．２になるように
使用することが適当である。The curing agent is usually preferably used in an equivalent ratio of 0.7 to 1.5 with respect to the epoxy resin, particularly preferably 0.8 to 1.5.
It is suitable to use so as to be 1.3 to 1.3, more preferably 0.8 to 1.2.
【００１１】二酸化珪素粉末は、二酸化珪素純度が９７
％以上のもので最大一次粒子径が０．５〜７μｍのもの
が好ましい。純度が９７％未満のものは、塗膜にした際
に不純物の色相が現れ、クリアーの塗膜が得られないた
め好ましくない。粒子径は０．５μｍ未満であると本発
明の効果が得られないばかりか、添加量によっては吸油
のため塗膜光沢が低下するケースがあるので好ましくな
い。また７μｍを超えると薄膜に塗装される際、塗膜表
面に二酸化珪素粒子が頭を出し、光を乱反射させ塗膜の
クリアー感が損なわれるので好ましくない。なお二酸化
珪素の粒子形状は、多孔質のものでない限り自由に選択
できる。多孔質であると一次粒子径に対し空孔率が非常
に高くなり、粒子径の非常に小さいものを添加したとき
と同様に給油量の増大を招き、塗膜光沢が低下するケー
スがあるので好ましくない。The silicon dioxide powder has a silicon dioxide purity of 97.
% Or more and a maximum primary particle diameter of 0.5 to 7 μm is preferable. When the purity is less than 97%, the hue of impurities appears when a coating film is formed, and a clear coating film cannot be obtained, which is not preferable. If the particle size is less than 0.5 μm, not only the effect of the present invention cannot be obtained, but also the gloss of the coating film may be reduced due to oil absorption depending on the amount of addition, which is not preferable. On the other hand, when the thickness is more than 7 μm, when coated on a thin film, silicon dioxide particles come out on the surface of the coating film, irregularly reflect light and impair the clear feeling of the coating film. The particle shape of silicon dioxide can be freely selected as long as it is not porous. Porous, the porosity becomes very high with respect to the primary particle diameter, and as in the case where a very small particle diameter is added, an increase in the amount of lubrication is caused, and in some cases, the gloss of the coating film is reduced. Not preferred.
【００１２】また二酸化珪素粉末は、アクリル樹脂及び
硬化剤からなる粉体塗料組成物１００重量部に対し、１
〜２０重量部の範囲で添加する。１重量部未満では耐衝
撃性、耐食性が劣り、２０重量部を超える配合をする
と、塗膜中で樹脂との屈折率の差から曇りが発生し、良
好なクリアーにならないため好ましくない。The silicon dioxide powder is added to 100 parts by weight of a powder coating composition comprising an acrylic resin and a curing agent.
It is added in the range of ２０20 parts by weight. If the amount is less than 1 part by weight, the impact resistance and the corrosion resistance are inferior. If the amount exceeds 20 parts by weight, cloudiness occurs due to the difference in refractive index between the resin and the resin in the coating film.
【００１３】シランカップリング剤はエポキシシラン系
化合物がよく、粉体塗料組成物１００重量部に対し０．
１〜４重量部添加することが好ましく、特に好ましくは
０．３〜１．５重量部、更に好ましくは０．４〜１．２
重量部の範囲で添加する。０．１％以下では耐衝撃性、
耐食性が劣り、４重量部を超えて添加するとシランカッ
プリング剤は液状のため、粉体塗料粒子を接着してしま
うため、粉体特性の著しい悪化をきたし好ましくない。
エポキシシラン系がなぜ良好なのかは明確になっていな
いが、基材−塗膜界面への配向が良好であるためと思わ
れる。このようなシランカップリング剤として、β−
（３，４エポキシシクロヘキシル）エチルトリメトキシ
シランやγ−グリシドキシプロピルトリメトキシシラ
ン、γ−グリシドキシプロピルメチルジエトキシシラン
等が挙げられる。The silane coupling agent is preferably an epoxy silane compound, and is used in an amount of 0.1 to 100 parts by weight of the powder coating composition.
It is preferable to add 1 to 4 parts by weight, particularly preferably 0.3 to 1.5 parts by weight, more preferably 0.4 to 1.2 parts by weight.
Add in parts by weight. 0.1% or less impact resistance,
When the silane coupling agent is added in an amount exceeding 4 parts by weight, the silane coupling agent is in a liquid state and adheres to the powder coating particles.
It is not clear why the epoxysilane system is good, but it is presumed that the orientation to the substrate-coating film interface is good. As such a silane coupling agent, β-
(3,4 epoxycyclohexyl) ethyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, and the like.
【００１４】また、その他の添加剤も配合することがで
きる、そのような添加剤としては例えば、レベリング剤
や紫外線吸収剤、光安定剤等である。以上の各材料を混
合した後、１軸ないしは２軸の粉体塗料溶融混練機を用
い溶融混練を行った後、ピンミル等の粉砕機で粉砕を行
い、分級機で任意の粒度分布に調整して粉体塗料が得ら
れる。Further, other additives can also be added. Examples of such additives include a leveling agent, an ultraviolet absorber, and a light stabilizer. After mixing the above materials, the mixture is melt-kneaded using a uniaxial or biaxial powder coating melt-kneading machine, then pulverized by a pulverizer such as a pin mill, and adjusted to an arbitrary particle size distribution by a classifier. Thus, a powder coating is obtained.
【００１５】[0015]
【実施例】発明をより詳細に説明するために、以下に実
施例を示す。実施例中「部」は重量部を表す。EXAMPLES In order to explain the present invention in more detail, examples are shown below. In the examples, "parts" represents parts by weight.
【００１６】（粉体塗料Ａの調製）オキシラン環を官能
基に持つエポキシ価１８．５（×１０-2 ｅｑ／１００
ｇ）のアクリル樹脂（三井東圧社製、商品名：ＰＤ７６
９０）８１部、硬化剤としてデカンジカルボン酸１７
部、レベリング剤としてモダフローパウダー（モンサン
ト社商品名）１部、最大一次粒径５μｍのシリカ粉末
（二酸化珪素純度：９８％）１部にエポキシシラン系シ
ランカップリグ剤（信越シリコーン社製、商品名：ＫＢ
Ｍ４０３）０．４部を混合し、混練、分級を行い、平均
粒径２５μｍの粉体塗料Ａを調製した。(Preparation of Powder Coating A) Epoxy value having an oxirane ring as a functional group of 18.5 (× 10 -2 eq / 100)
g) acrylic resin (trade name: PD76, manufactured by Mitsui Toatsu Co., Ltd.)
90) 81 parts, decanedicarboxylic acid 17 as a curing agent
1 part of Modaflow powder (trade name of Monsanto Co.) as a leveling agent, 1 part of silica powder (purity of silicon dioxide: 98%) having a maximum primary particle diameter of 5 μm, and an epoxysilane-based silane coupling agent (manufactured by Shin-Etsu Silicone Co., Ltd.) Name: KB
M403) were mixed, kneaded and classified to prepare a powder coating A having an average particle size of 25 μm.
【００１７】（粉体塗料Ｂの調製）オキシラン環を官能
基に持つエポキシ価１８．５（×１０-2 ｅｑ／１００
ｇ）のアクリル樹脂（三井東圧社製、商品名：ＰＤ７６
９０）７４部、硬化剤としてデカンジカルボン酸１５
部、レベリング剤としてモダフローパウダー（モンサン
ト社商品名）１部、最大一次粒径５μｍのシリカ粉末
（二酸化珪素純度：９８％）１０部にエポキシシラン系
シランカップリグ剤（信越シリコーン社製、商品名：Ｋ
ＢＭ４０３）２．０部を混合し、混練、分級を行い、平
均粒径２５μｍの粉体塗料Ｂを調製した。(Preparation of Powder Coating B) Epoxy value having an oxirane ring as a functional group is 18.5 (× 10 -2 eq / 100)
g) acrylic resin (trade name: PD76, manufactured by Mitsui Toatsu Co., Ltd.)
90) 74 parts, decane dicarboxylic acid 15 as a curing agent
Parts, 1 part of Modaflow powder (trade name of Monsanto) as a leveling agent, 10 parts of silica powder (purity of silicon dioxide: 98%) having a maximum primary particle diameter of 5 μm, and an epoxysilane-based silane coupling agent (manufactured by Shin-Etsu Silicone Co., Ltd.) Name: K
BM403) were mixed, kneaded and classified to prepare a powder coating material B having an average particle size of 25 μm.
【００１８】（粉体塗料Ｃの調製）オキシラン環を官能
基に持つエポキシ価１８．５（×１０-2 ｅｑ／１００
ｇ）のアクリル樹脂（三井東圧社製、商品名：ＰＤ７６
９０）７４部、硬化剤としてデカンジカルボン酸１５
部、レベリング剤としてモダフローパウダー（モンサン
ト社商品名）１部、最大一次粒径５μｍのシリカ粉末
（二酸化珪素純度：９８％）１０部にエポキシシラン系
シランカップリグ剤（信越シリコーン社製、商品名：Ｋ
ＢＭ４０３）０．４部を混合し、混練、分級を行い、平
均粒径２５μｍの粉体塗料Ｃを調製した。(Preparation of Powder Coating C) Epoxy value having an oxirane ring as a functional group of 18.5 (× 10 -2 eq / 100)
g) acrylic resin (trade name: PD76, manufactured by Mitsui Toatsu Co., Ltd.)
90) 74 parts, decane dicarboxylic acid 15 as a curing agent
Parts, 1 part of Modaflow powder (trade name of Monsanto) as a leveling agent, 10 parts of silica powder (purity of silicon dioxide: 98%) having a maximum primary particle diameter of 5 μm, and an epoxysilane-based silane coupling agent (manufactured by Shin-Etsu Silicone Co., Ltd.) Name: K
BM403) were mixed, kneaded and classified to prepare a powder coating material C having an average particle size of 25 μm.
【００１９】（粉体塗料Ｄの調製）オキシラン環を官能
基に持つエポキシ価１８．５（×１０-2 ｅｑ／１００
ｇ）のアクリル樹脂（三井東圧社製、商品名：ＰＤ７６
９０）８１部、硬化剤としてデカンジカルボン酸１７
部、レベリング剤としてモダフローパウダー（モンサン
ト社商品名）１部、最大一次粒径５μｍのシリカ粉末
（二酸化珪素純度：９８％）１部にエポキシシラン系シ
ランカップリグ剤（信越シリコーン社製、商品名：ＫＢ
Ｍ４０３）２．０部を混合し、混練、分級を行い、平均
粒径２５μｍの粉体塗料Ｄを調製した。(Preparation of Powder Coating D) Epoxy value having an oxirane ring as a functional group of 18.5 (× 10 -2 eq / 100)
g) acrylic resin (trade name: PD76, manufactured by Mitsui Toatsu Co., Ltd.)
90) 81 parts, decanedicarboxylic acid 17 as a curing agent
1 part of Modaflow powder (trade name of Monsanto Co.) as a leveling agent, 1 part of silica powder (purity of silicon dioxide: 98%) having a maximum primary particle diameter of 5 μm, and an epoxysilane-based silane coupling agent (manufactured by Shin-Etsu Silicone Co., Ltd.) Name: KB
M403) was mixed, kneaded and classified to prepare a powder coating D having an average particle size of 25 μm.
【００２０】（粉体塗料Ｅの調製）オキシラン環を官能
基に持つエポキシ価１８．５（×１０-2 ｅｑ／１００
ｇ）のアクリル樹脂（三井東圧社製、商品名：ＰＤ７６
９０）８１部、硬化剤としてデカンジカルボン酸１７
部、レベリング剤としてモダフローパウダー（モンサン
ト社商品名）１部、最大一次粒径５μｍのシリカ粉末
（二酸化珪素純度：９８％）１部にエポキシシラン系シ
ランカップリグ剤（信越シリコーン社製、商品名：ＫＢ
Ｍ４０３）５．０部を混合し、混練、分級を行い、平均
粒径２５μｍの粉体塗料Ｅを調製した。(Preparation of Powder Coating E) Epoxy value having an oxirane ring as a functional group is 18.5 (× 10 -2 eq / 100)
g) acrylic resin (trade name: PD76, manufactured by Mitsui Toatsu Co., Ltd.)
90) 81 parts, decanedicarboxylic acid 17 as a curing agent
1 part of Modaflow powder (trade name of Monsanto Co.) as a leveling agent, 1 part of silica powder (purity of silicon dioxide: 98%) having a maximum primary particle diameter of 5 μm, and an epoxysilane-based silane coupling agent (manufactured by Shin-Etsu Silicone Co., Ltd.) Name: KB
M403) was mixed, kneaded and classified to prepare a powder coating E having an average particle size of 25 μm.
【００２１】（粉体塗料Ｆの調製）オキシラン環を官能
基に持つエポキシ価１８．５（×１０-2 ｅｑ／１００
ｇ）のアクリル樹脂（三井東圧社製、商品名：ＰＤ７６
９０）７４部、硬化剤としてデカンジカルボン酸１５
部、レベリング剤としてモダフローパウダー（モンサン
ト社商品名）１部、最大一次粒径５μｍのシリカ粉末
（二酸化珪素純度：９８％）１０部を混合し、混練、分
級を行い、平均粒径２５μｍの粉体塗料Ｆを調製した。(Preparation of Powder Coating F) Epoxy value having an oxirane ring as a functional group of 18.5 (× 10 -2 eq / 100)
g) acrylic resin (trade name: PD76, manufactured by Mitsui Toatsu Co., Ltd.)
90) 74 parts, decane dicarboxylic acid 15 as a curing agent
Parts, 1 part of Modaflow powder (trade name of Monsanto Co.) as a leveling agent, and 10 parts of silica powder (silicon dioxide purity: 98%) having a maximum primary particle diameter of 5 μm were mixed, kneaded and classified to obtain an average particle diameter of 25 μm. Powder coating F was prepared.
【００２２】（粉体塗料Ｇの調製）オキシラン環を官能
基に持つエポキシ価１８．５（×１０-2 ｅｑ／１００
ｇ）のアクリル樹脂（三井東圧社製、商品名：ＰＤ７６
９０）７２部、硬化剤としてデカンジカルボン酸１４
部、レベリング剤としてモダフローパウダー（モンサン
ト社商品名）１部、最大一次粒径５μｍのシリカ粉末
（二酸化珪素純度：９８％）２５部にエポキシシラン系
シランカップリグ剤（信越シリコーン社製、商品名：Ｋ
ＢＭ４０３）２．０部を混合し、混練、分級を行い、平
均粒径２５μｍの粉体塗料Ｇを調製した。(Preparation of Powder Coating G) Epoxy value having an oxirane ring as a functional group of 18.5 (× 10 -2 eq / 100)
g) acrylic resin (trade name: PD76, manufactured by Mitsui Toatsu Co., Ltd.)
90) 72 parts, decanedicarboxylic acid 14 as a curing agent
Parts, 1 part of Modaflow powder (trade name of Monsanto Co.) as a leveling agent, 25 parts of silica powder (purity of silicon dioxide: 98%) having a maximum primary particle diameter of 5 μm and 25 parts of an epoxysilane-based silane coupling agent (manufactured by Shin-Etsu Silicone Co., Ltd.) Name: K
BM403) were mixed, kneaded and classified to prepare a powder coating G having an average particle size of 25 μm.
【００２３】（粉体塗料Ｈの調製）オキシラン環を官能
基に持つエポキシ価１８．５（×１０-2 ｅｑ／１００
ｇ）のアクリル樹脂（三井東圧社製、商品名：ＰＤ７６
９０）８１部、硬化剤としてデカンジカルボン酸１７
部、レベリング剤としてモダフローパウダー（モンサン
ト社商品名）１部にエポキシシラン系シランカップリグ
剤（信越シリコーン社製、商品名：ＫＢＭ４０３）２．
０部を混合し、混練、分級を行い、平均粒径２５μｍの
粉体塗料Ｈを調製した。(Preparation of Powder Coating H) Epoxy value having an oxirane ring as a functional group of 18.5 (× 10 -2 eq / 100)
g) acrylic resin (trade name: PD76, manufactured by Mitsui Toatsu Co., Ltd.)
90) 81 parts, decanedicarboxylic acid 17 as a curing agent
1 part of Modaflow powder (trade name of Monsanto) as a leveling agent and 1 part of epoxysilane silane coupling agent (trade name: KBM403, manufactured by Shin-Etsu Silicone Co., Ltd.)
0 parts were mixed, kneaded and classified to prepare a powder coating H having an average particle size of 25 μm.
【００２４】（実施例１）粉体塗料Ａを摩擦帯電ガン
（ノードソン社製：ＴＲＩＢＯＭＡＴＩＣ ＩＩ）を用
いて膜厚４０μｍとなるよう、クロメート処理（ミリオ
ン化学社製 グランダーＡＬ−８ＥＶ１）されたアルミ
ニウム材上に塗装を行い、１７０℃で２０分間焼付を行
い塗膜を形成し評価した。その結果を表１に示す。(Example 1) An aluminum material obtained by subjecting a powder coating material A to a chromate treatment (Grander AL-8EV1 manufactured by Million Chemical Co., Ltd.) by using a triboelectric gun (TRIBOMATIC II manufactured by Nordson) so as to have a film thickness of 40 μm. The coating was performed on the upper surface and baked at 170 ° C. for 20 minutes to form a coating film and evaluated. Table 1 shows the results.
【００２５】出来た塗板に対して以下の評価を行った。The following evaluations were made on the resulting coated plates.
【００２６】＜外観＞ 目視判定 ＜衝撃性＞ＪＩＳ ５４００ ８．３準拠 但し、ポン
チ径は１／２インチ、おもり重さは５００ｇとする。 ＜耐沸騰水性＞塗板を１００℃の熱水中に２時間浸漬
し、その後取り出し１ｍｍ角の碁盤目状クロスカットを
行い、セロハンテープ剥離による付着性試験を行う。評
価は１００ヶ中の残存数。 ＜ブロッキング性＞塗料１００ｇを２００ｃｃの容器中
に入れ３５℃恒温機中に７２時間放置し、その後に取り
出し、塗料中に塊が発生していないかを確認する。 ＜貯蔵安定性＞塗料を４０℃の恒温機中に１週間放置
し、その後に塗装焼付を行い、塗面状態を観察する。<Appearance> Visual judgment <Impact> Conforms to JIS 5400 8.3 However, the punch diameter is 1/2 inch and the weight is 500 g. <Boiling water resistance> The coated plate is immersed in hot water at 100 ° C. for 2 hours, then taken out, cut into a 1 mm square cross-cut, and subjected to an adhesion test by peeling off cellophane tape. The evaluation is the number of survivors out of 100. <Blocking property> 100 g of the paint is placed in a 200 cc container, left in a thermostat at 35 ° C. for 72 hours, and then taken out to check whether a lump is generated in the paint. <Storage stability> The paint is left to stand in a thermostat at 40 ° C. for one week, after which the paint is baked and the state of the paint surface is observed.
【００２７】（実施例２〜４）粉体塗料Ｂ〜Ｄを用いた
以外は、実施例１と同様に作成し評価した。その結果を
表１に示す。Examples 2 to 4 Except that powder coatings B to D were used, they were prepared and evaluated in the same manner as in Example 1. Table 1 shows the results.
【００２８】（比較例１〜４）粉体塗料Ｅ〜Ｈを用いた
以外は、実施例１と同様に作成し評価した。その結果を
表１に示す。(Comparative Examples 1 to 4) Except that powder coatings E to H were used, they were prepared and evaluated in the same manner as in Example 1. Table 1 shows the results.
【００２９】[0029]
【表１】 [Table 1]
【００３０】[0030]
【発明の効果】本発明の粉体塗料は、クロメート処理し
た基材上に直接クリアー塗膜を形成することが可能であ
る。また、形成された塗膜の透明感も高く、３０〜５０
μｍ程度の膜厚で従来並みの物理性能と、従来以上の耐
食性能を発揮する。The powder coating of the present invention can form a clear coating film directly on a chromate-treated substrate. Further, the transparency of the formed coating film is high, and is 30-50.
With a film thickness of about μm, it exhibits the same physical performance as before and the corrosion resistance more than before.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 増田 祥 愛知県岩倉市本町畑中58−102 Ｆターム(参考） 4J038 CG141 CH171 DL121 HA446 JC30 KA03 LA07 NA03 NA11 PA02 PC02 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Sachi Masuda 58-102, Honcho, Iwakura-shi, Aichi F-term (reference) 4J038 CG141 CH171 DL121 HA446 JC30 KA03 LA07 NA03 NA11 PA02 PC02
Claims (3)
料組成物１００重量部に対し、最大一次粒子径０．５〜
７μｍの純度９７％以上の二酸化珪素を１〜２０重量
部、及びシランカップリング剤を０．１〜４重量部を含
有してなるアルミニウムホイール用クリアー粉体塗料組
成物。A maximum primary particle diameter of 0.5 to 100 parts by weight of a powder coating composition comprising an acrylic resin and a curing agent.
A clear powder coating composition for aluminum wheels, comprising 1 to 20 parts by weight of 7 μm silicon dioxide having a purity of 97% or more and 0.1 to 4 parts by weight of a silane coupling agent.
シラン環を有する請求項１記載のアルミニウムホイール
用クリアー粉体塗料組成物。2. The clear powder coating composition for an aluminum wheel according to claim 1, wherein the acrylic resin has an oxirane ring as a functional group.
料組成物１００重量部に対し、最大一次粒子径０．５〜
７μｍの純度９７％以上の二酸化珪素を１〜２０重量
部、及びシランカップリング剤を０．１〜４重量部を含
有してなるクリアー粉体塗料組成物よりなる塗膜を表面
に有するアルミニウムホイール。3. A maximum primary particle size of 0.5 to 100 parts by weight of a powder coating composition comprising an acrylic resin and a curing agent.
Aluminum wheel having on its surface a coating film composed of a clear powder coating composition containing 1 to 20 parts by weight of 7 μm silicon dioxide having a purity of 97% or more and 0.1 to 4 parts by weight of a silane coupling agent. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20732198A JP2000038523A (en) | 1998-07-23 | 1998-07-23 | Clear powder coating composition for aluminum wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20732198A JP2000038523A (en) | 1998-07-23 | 1998-07-23 | Clear powder coating composition for aluminum wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000038523A true JP2000038523A (en) | 2000-02-08 |
Family
ID=16537840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20732198A Pending JP2000038523A (en) | 1998-07-23 | 1998-07-23 | Clear powder coating composition for aluminum wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000038523A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001026738A (en) * | 1999-07-16 | 2001-01-30 | Dainippon Ink & Chem Inc | Powder coating composition for aluminum wheel |
| KR100494585B1 (en) * | 2002-08-08 | 2005-06-13 | 현대자동차주식회사 | Coating composition for steering wheel of automobile |
-
1998
- 1998-07-23 JP JP20732198A patent/JP2000038523A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001026738A (en) * | 1999-07-16 | 2001-01-30 | Dainippon Ink & Chem Inc | Powder coating composition for aluminum wheel |
| KR100494585B1 (en) * | 2002-08-08 | 2005-06-13 | 현대자동차주식회사 | Coating composition for steering wheel of automobile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5010806B2 (en) | Powder coating composition and method for coating aluminum wheel | |
| US6905772B2 (en) | Abrasion and impact resistant coating compositions, and articles coated therewith | |
| EP0736073B1 (en) | Coating composition containing optically-variable dichroic pigment and interference mica pigment | |
| KR101004729B1 (en) | Acrylic Coating Powder Comprising Hydrophobic Particles and Powder Coating Therefrom Having Improved Filiform Corrosion Resistance | |
| US5736602A (en) | Retroreflective coating composition for coil coating application, method for application, and articles produced therefrom | |
| KR101004728B1 (en) | Epoxy functional acrylic coating powders and powder coatings therefrom having improved filiform corrosion resistance | |
| JPH0395275A (en) | Reflective automobile coating composition | |
| US8932492B2 (en) | Energy-saving anti-corrosive metal film composition and manufacturing method for the same | |
| JPH0114945B2 (en) | ||
| WO2003070386A3 (en) | Curable film-forming composition exhibiting improved resistance to degradation by ultraviolet light | |
| EP0736076A1 (en) | Coating composition containing optically-variable pigment and black pigment | |
| JP2000038523A (en) | Clear powder coating composition for aluminum wheel | |
| JP4598230B2 (en) | Powder coating composition | |
| JP4272668B2 (en) | Method of painting aluminum alloy wheel and aluminum alloy wheel | |
| JP3824322B2 (en) | Coating composition comprising an optically variable pigment | |
| CA2300139C (en) | Powder coating composition for forming multilayer film | |
| JPS6317976A (en) | Zinc-rich paint composition | |
| JPH03239769A (en) | Metallic paint and method for coating therewith | |
| CN115717013B (en) | Transparent powder coating composition and coating thereof | |
| JP3346505B2 (en) | Manufacturing method of mirror surface | |
| JP2009057640A (en) | Coating method of aluminum alloy wheel, and aluminum alloy wheel | |
| KR102226133B1 (en) | Powder Coating Composition | |
| JPH02110177A (en) | Paint composition | |
| JPH03114574A (en) | Metallic finish of aluminum foil | |
| JPH10120944A (en) | Powder coating material composition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20021210 |