JPH06256692A - Method for forming powder coating film - Google Patents
Method for forming powder coating filmInfo
- Publication number
- JPH06256692A JPH06256692A JP7101793A JP7101793A JPH06256692A JP H06256692 A JPH06256692 A JP H06256692A JP 7101793 A JP7101793 A JP 7101793A JP 7101793 A JP7101793 A JP 7101793A JP H06256692 A JPH06256692 A JP H06256692A
- Authority
- JP
- Japan
- Prior art keywords
- powder coating
- coating material
- coating film
- powder
- diameter
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は粉体塗膜形成方法に関す
る。FIELD OF THE INVENTION The present invention relates to a method for forming a powder coating film.
【０００２】[0002]
【従来の技術及びその課題】従来、エッジ部のある被塗
装面に通常の粉体塗料を塗装した場合には、粉体塗料の
静電反発によりエッジ部に付着し難いこと及び加熱溶融
物の表面張力によってエッジ部の塗装膜厚が薄くなる。
このためにエッジ部の防食性が劣るといった欠点があっ
た。2. Description of the Related Art Conventionally, when a normal powder coating material is applied to a surface to be coated having an edge portion, it is difficult to adhere to the edge portion due to electrostatic repulsion of the powder coating material, The surface tension reduces the coating film thickness on the edge.
For this reason, there is a drawback that the corrosion resistance of the edge portion is poor.
【０００３】このエッジ部の防食性を改善するために粉
体塗料に顔料を多量に配合したり、ゲル化微粒子を配合
する等の種々の方法を試みたが平滑性とエッジ部の塗膜
形成とは両立せず、これらを満足するものが今だに得ら
れていないのが実情である。In order to improve the corrosion resistance of the edge portion, various methods such as blending a large amount of pigment into the powder coating material and blending gelled fine particles have been tried, but smoothness and coating film formation on the edge portion have been tried. It is not compatible with the above, and the reality is that no one has been satisfied to satisfy them.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記した問題
点を解消するために鋭意研究を重ねた結果、被塗装面に
粉体塗料を塗装し、次に該粉体塗料を加熱溶融させずに
このものの上から更に別の粉体塗料を塗装し、続いてこ
れらの粉体塗料を同時に加熱し硬化させる塗装方法と
し、かつ上記２種類の粉体塗料を特定のフロー性に調製
したものが平滑性及びエッジ部に対する防食性に優れた
硬化塗膜が形成できることを見い出し、本発明を完成す
るに至った。Means for Solving the Problems In the present invention, as a result of intensive studies for solving the above-mentioned problems, as a result, a powder coating material is coated on a surface to be coated, and then the powder coating material is melted by heating. A coating method in which another powder coating material is applied on top of this one, and then these powder coating materials are simultaneously heated and cured, and the above two types of powder coating materials are prepared to have a specific flow property. It was found that a cured coating film having excellent smoothness and corrosion resistance to the edge portion can be formed, and the present invention has been completed.
【０００５】即ち、本発明は被塗装面に、１段目とし
て、粉体塗料約０．８ｇを直径１３mm、高さ約４mmの円
柱状になるように３０kg/mm2加圧成型したものを１５０
℃−１０分間加熱フローさせた時の広がりの長さが平均
直径１５〜２２mmである粉体塗料（以下、このものを
「粉体塗料Ａ」と略す。）を塗装し、次いで、２段目と
して、上記と同様の方法で測定した加圧成型したものの
広がりの長さが平均直径２０〜４０mm、かつその広がり
長さの差が１段目よりも直径２mm以上大きい粉体塗料
（以下、このものを「粉体塗料Ｂ」と略す。）を塗装
し、続いてこれらの塗装膜を同時に焼付け硬化させるこ
とを特徴とする粉体塗膜形成方法に係る。That is, according to the present invention, as a first step, about 0.8 g of powder coating is pressure-molded on the surface to be coated into a cylindrical shape having a diameter of 13 mm and a height of about 4 mm at 30 kg / mm 2. 150
Powder coating having an average diameter of 15 to 22 mm (hereinafter referred to as "powder coating A") having an average length of 15 to 22 mm when heated and flowed at -10 ° C for 10 minutes, and then the second stage As for the powder coating material, the spread length of the pressure-molded product measured by the same method as described above has an average diameter of 20 to 40 mm, and the difference in the spread length is 2 mm or more in diameter than the first stage (hereinafter, (Hereinafter, abbreviated as "powder paint B"), and subsequently baking and curing these coating films at the same time.
【０００６】本発明方法で用いる粉体塗料Ａは、粉体塗
料約０．８ｇを直径１３mm、高さ約４mmの円柱状になる
ように３０kg/mm2加圧成型したものを１５０℃−１０分
間加熱フローさせた時の広がりの長さが平均直径１５〜
２２mmのものである。該加圧成型は例えば粉体塗料をＫ
Ｂｒデスクプレス（直径１３mm）（日立製作所社製）に
入れ錠剤成型機（島津製作所社製）を用いておこなうこ
とができる。また、加圧成型したものは大きさ長さ１５
cm×幅１０cm×厚さ０．０８cmのブライト鋼板（ＪＩＳ
Ｇ−３１４１、ＳＰＣＣ、ＳＢ）の脱脂板の上に乗せ
たのち加熱される。The powder coating material A used in the method of the present invention was obtained by press-molding about 0.8 g of the powder coating material into a cylinder having a diameter of 13 mm and a height of about 4 mm at 30 kg / mm 2 at 150 ° C.-10. The average length of the spread is 15-
It is 22 mm. The pressure molding is performed by using, for example, powder coating K
It can be put in a Br desk press (diameter 13 mm) (manufactured by Hitachi, Ltd.) and using a tablet molding machine (manufactured by Shimadzu). In addition, the size of the pressure-molded product is 15
Bright steel plate (cm x width 10 cm x thickness 0.08 cm (JIS
G-3141, SPCC, SB) is placed on a degreasing plate and then heated.
【０００７】上記粉体塗料Ａの広がりは平均直径１５〜
２２mmの範囲にあることが重要な要件である。その広が
りの長さが平均直径１５mmを下回ると焼付け時における
流動性が悪くなり均一な連続塗膜が得られず仕上り性、
物理加工性、防食性などの性能が劣り、一方、平均直径
２２mmを上回るとエッジ部を十分に被覆することが難し
く、そのために塗膜の防食性が劣るものとなる。The spread of the powder coating material A has an average diameter of 15 to
It is an important requirement to be in the range of 22 mm. If the length of the spread is less than 15 mm in average diameter, the fluidity at the time of baking becomes poor, and a uniform continuous coating film cannot be obtained, resulting in finishability.
Performances such as physical workability and corrosion resistance are inferior. On the other hand, if the average diameter exceeds 22 mm, it is difficult to sufficiently cover the edge portion, and therefore the corrosion resistance of the coating film is inferior.
【０００８】粉体塗料Ａとしては、例えばエポキシ樹脂
系粉体塗料、ポリエステル樹脂系粉体塗料、アクリル樹
脂系粉体塗料及びこれらの混合物又はハイブリッド系の
ものが使用できる。As the powder coating material A, for example, an epoxy resin powder coating material, a polyester resin powder coating material, an acrylic resin powder coating material, a mixture thereof or a hybrid coating material can be used.
【０００９】上記エポキシ樹脂系粉体塗料としては、例
えばビスフェノール−エピクロルヒドリン型、ノボラッ
ク型、脂環式などのエポキシ樹脂を基体樹脂とし、かつ
芳香族アミン、酸無水物、ジシアンジアミド又はその誘
導体、ジヒドラジド、フェノール樹脂などを硬化剤とし
て含有するものが好ましい。Examples of the above-mentioned epoxy resin-based powder coating material include, for example, bisphenol-epichlorohydrin type, novolac type, alicyclic type epoxy resin as a base resin, and aromatic amine, acid anhydride, dicyandiamide or its derivative, dihydrazide, Those containing a phenol resin or the like as a curing agent are preferable.
【００１０】ポリエステル樹脂系粉体塗料としては、例
えばテレフタル酸、イソフタル酸及びトリメリット酸な
どの飽和多塩基酸とエチレングリコール、グリセリン、
ネオペンチルグリコール、トリメチロールプロパンなど
の多価アルコールを原料とする水酸基及び／又はカルボ
キシル基含有オイルフリーポリエステルを基体樹脂と
し、かつブロックポリイソシアネート、アミノ樹脂、ト
リグリシジルイソシアヌレートなどを硬化剤として含有
するものが好ましい。Examples of polyester resin powder coatings include saturated polybasic acids such as terephthalic acid, isophthalic acid and trimellitic acid, and ethylene glycol, glycerin,
Hydroxyl and / or carboxyl group-containing oil-free polyester made from polyhydric alcohol such as neopentyl glycol and trimethylolpropane is used as a base resin, and block polyisocyanate, amino resin, triglycidyl isocyanurate, etc. are contained as a curing agent. Those are preferable.
【００１１】アクリル樹脂系粉体塗料としては、例えば
ヒドロキシエチル（メタ）アクリレートを共重合体成分
として含有する水酸基含有アクリル樹脂を基体樹脂及び
ブロックポリイソシアネート、アミノ樹脂を硬化剤とす
るものやグリシジル（メタ）アクリレートを共重合体成
分として含有するグリシジル基含有アクリル樹脂を基体
樹脂及びドデカン２酸などの多塩基酸を硬化剤とするも
のなどが好ましい。As the acrylic resin powder coating, for example, a hydroxyl group-containing acrylic resin containing hydroxyethyl (meth) acrylate as a copolymer component is used as a base resin and a block polyisocyanate, and an amino resin as a curing agent, or glycidyl ( A glycidyl group-containing acrylic resin containing (meth) acrylate as a copolymer component is preferably used as a base resin and a polybasic acid such as dodecane diacid as a curing agent.
【００１２】上記した粉体塗料Ａの中でもエポキシ樹脂
系粉体塗料及びポリエステル樹脂系粉体塗料を用いるこ
とが好ましい。Among the above powder coating materials A, it is preferable to use epoxy resin powder coating materials and polyester resin powder coating materials.
【００１３】また、粉体塗料Ａには充填剤を粉体塗料の
硬化性樹脂（硬化剤成分も含む）１００重量部に対して
２０〜２００重量部含有することが好ましい。充填剤の
含有量が２０重量部を下回るとエッジ部に対する防食性
が十分でなく、一方、２００重量部を上回ると仕上り性
が低下するので好ましくない。Further, the powder coating material A preferably contains 20 to 200 parts by weight of a filler with respect to 100 parts by weight of the curable resin (including the curing agent component) of the powder coating material. If the content of the filler is less than 20 parts by weight, the anticorrosive property against the edge portion is not sufficient, while if it exceeds 200 parts by weight, the finish property is deteriorated, which is not preferable.
【００１４】上記充填剤としては、例えば炭酸カルシウ
ム、沈降性炭酸カルシウム、クレー、カオリン、陶土、
けい酸アルミニウム、けい藻土、ホワイトカーボン、シ
リカ白、含水微粉けい酸、含水けい酸マグネシウム、ベ
ントナイト、けい酸アルミニウム、沈降性炭酸マグネシ
ウム、塩基性炭酸マグネシウム、バライト粉、硫酸バリ
ウム、沈降性硫酸バリウム、炭酸バリウム等が挙げられ
る。Examples of the above-mentioned filler include calcium carbonate, precipitated calcium carbonate, clay, kaolin, porcelain clay,
Aluminum silicate, diatomaceous earth, white carbon, silica white, hydrous fine powder silicic acid, hydrous magnesium silicate, bentonite, aluminum silicate, precipitated magnesium carbonate, basic magnesium carbonate, barite powder, barium sulfate, precipitated barium sulfate. , Barium carbonate and the like.
【００１５】粉体塗料Ａの広がりの長さは、例えば基体
樹脂の分子量、Ｔｇ（ガラス転移温度）や充填剤配合割
合によって調製することができる。The length of spread of the powder coating material A can be adjusted by, for example, the molecular weight of the base resin, Tg (glass transition temperature) and the blending ratio of the filler.
【００１６】本発明方法で用いる粉体塗料Ｂは、前記と
同様の方法で測定した加圧成型したものの加熱後の広が
りの長さが平均直径２０〜４０mm、好ましくは２４〜４
０mmの範囲である。その広がりの長さが平均直径２０mm
を下回るとユズ膚などによる仕上り外観が劣り、一方、
平均直径４０mmを上回るとタレなどによる塗膜欠陥を生
じるといった欠点がある。また、粉体塗料Ｂは加圧成型
したものの加熱後の広がり長さの差が平均直径２mm以上
大きいものが使用される。この差が平均直径２mmを下回
るとユズ膚などによる仕上り外観が劣る。The powder coating material B used in the method of the present invention is a pressure-molded product measured by the same method as described above, and the spread length after heating has an average diameter of 20 to 40 mm, preferably 24 to 4
The range is 0 mm. The length of the spread is 20 mm in average diameter
If it is less than, the finished appearance due to Yuzu skin will be inferior, while
If the average diameter exceeds 40 mm, there is a drawback that coating defects occur due to sagging. Further, as the powder coating material B, there is used one which is formed by pressure molding but has a large difference in spread length after heating of 2 mm or more in average diameter. If this difference is less than the average diameter of 2 mm, the finished appearance due to cracked skin will be poor.
【００１７】粉体塗料Ｂとしては、前記と同様のエポキ
シ樹脂系粉体塗料、ポリエステル樹脂系粉体塗料、アク
リル樹脂系粉体塗料及びこれらの混合物又はハイブリッ
ド系のものが使用できる。As the powder coating material B, the same epoxy resin powder coating material, polyester resin powder coating material, acrylic resin powder coating material, and a mixture or hybrid thereof as described above can be used.
【００１８】粉体塗料Ｂの広がりの長さは、例えば基体
樹脂の分子量、Ｔｇによって調製することができる。ま
た、粉体塗料Ａ及びＢの平均粒子径は、約１０〜１５０
μm のものが好ましい。上記粉体塗料Ａ及びＢには着色
顔料、ハジキ防止剤、紫外線吸収剤などの塗料用添加剤
を必要に応じて配合することができる。The length of spread of the powder coating material B can be adjusted, for example, by the molecular weight of the base resin, Tg. The average particle size of the powder coating materials A and B is about 10 to 150.
The one having a size of μm is preferable. The powder coating materials A and B may be mixed with coating additives such as color pigments, cissing inhibitors, and ultraviolet absorbers, if necessary.
【００１９】本発明方法は、被塗装面に粉体塗料Ａを静
電塗装し、次いで粉体塗料Ｂを静電塗装したのち、焼付
け硬化させることによって実施できる。The method of the present invention can be carried out by electrostatically coating the powder coating material A on the surface to be coated, then electrostatically coating the powder coating material B, and then baking and curing.
【００２０】被塗装面としては、静電粉体塗装できるも
のであれば特に限定されず、例えばアルミニウム、鉄、
亜鉛などの金属やこのものに電着塗膜、中塗り塗膜及び
着色ベース塗膜（ソリッドカラー、メタリックカラーな
ど）などの下地塗膜を施したものが使用できる。また、
エッジ部を有する被塗装面としては例えば自動車用アル
ミニウムホイールなどがある。このものは例えばメタリ
ックベース（水性又は溶剤形）塗料を下塗りとして、ま
た粉体塗料Ａ及びＢを上塗りクリヤとして仕上げること
もできる。粉体塗料Ａ及びＢの塗装膜厚は焼付け硬化後
の膜厚で３０〜１００μm が好ましい。また、焼付けは
硬化剤の種類によって異なるが、通常、１４０℃〜２６
０℃で１０秒〜６０分間で十分と思われる。The surface to be coated is not particularly limited as long as it can be electrostatically powder coated. For example, aluminum, iron,
A metal such as zinc or the like and an electrodeposition coating film, an intermediate coating film, and a base coating film such as a colored base coating film (solid color, metallic color, etc.) can be used. Also,
An example of the painted surface having an edge portion is an aluminum wheel for automobiles. It can also be finished, for example, with a metallic base (water-based or solvent-based) coating as the undercoat and with powder coatings A and B as the topcoat clear. The coating thickness of the powder coating materials A and B is preferably 30 to 100 .mu.m after baking and curing. In addition, although the baking depends on the type of curing agent, it is usually 140 ° C to 26 ° C.
10 seconds to 60 minutes at 0 ° C appears to be sufficient.
【００２１】[0021]
【実施例】以下、実施例を掲げて本発明を詳しく説明す
る。 粉体塗料Ｅ、Ｐ、Ａの製造例 表１に記載の成分をヘンシェルミキサー（三井三池社
製）で混合し、ブスコニーダーＰＲ４６（スイス：ブス
社製）混練機で吐出量３０〜７０kg/H、温度８０〜１２
０℃、スクリュー回転数１００rpm の条件で混練する。
混練物を３〜６mm厚の平板状に取り出し速やかに冷却す
る。その後２〜３mm大に粗粉砕後アトマイザー（富士産
業（株）製）を用いて微粉砕する。そして１５０メッシ
ュ標準ふるいを用いてふるい分ける。粗粒を除去して粉
体塗料Ｅ、Ｐ、Ａを得る。EXAMPLES The present invention will be described in detail below with reference to examples. Production Example of Powder Coating E, P, A The ingredients shown in Table 1 were mixed with a Henschel mixer (manufactured by Mitsui Miike Co., Ltd.), and the discharge rate was 30 to 70 kg / H with a Buscon Kneader PR46 (Switzerland: Buss Co.) kneader. Temperature 80-12
Kneading is carried out under the conditions of 0 ° C. and screw rotation speed of 100 rpm.
The kneaded product is taken out into a flat plate having a thickness of 3 to 6 mm and immediately cooled. After that, it is roughly crushed to a size of 2 to 3 mm and then finely crushed using an atomizer (Fuji Sangyo Co., Ltd.). Then screen using a 150 mesh standard screen. Coarse particles are removed to obtain powder coating materials E, P and A.
【００２２】表１中の各成分は次の通りである。 基体樹脂 エポキシ樹脂ａ：エポン１００４（油化シェルエポキシ
社製、ビスフェノールＡ−エピクロルヒドリン型エポキ
シ樹脂、平均分子量約１４００） エポキシ樹脂ｂ：エポン１００１（油化シェルエポキシ
社製、ビスフェノールＡ−エピクロルヒドリン型エポキ
シ樹脂、平均分子量約９００） ポリエステル樹脂：ファインデックＭ８０１０（大日本
インキ社製、水酸基含有ポリエステル樹脂） アクリル樹脂：アロマテックＰＤ６３００（三井東圧社
製、グリシジル基含有アクリル樹脂） 硬化剤 エポキシ用硬化剤：エピキュア１０８ＦＦ（油化シェル
エポキシ社製、アミン系） ポリエステル用硬化剤：ＩＰＤ１−Ｂ１５３０（ダイセ
ルヒュルス社製、ε−カプロラクタムでブロック化され
たイソホロンジイソシアネート） アクリル用硬化剤：ドデカン２酸 顔料 着色顔料：チタン白ＪＲＮＣ（帝国化工社製、二酸化チ
タン） 充填剤：Ｓタルク（日本タルク社製、珪酸マグネシウ
ム） 添加剤 添加剤ａ：アクロナール４Ｆ（ＢＡＳＦ社製） 添加剤ｂ：ペインタッドＭ（ダウコーニング社製）The components in Table 1 are as follows. Base Resin Epoxy Resin a: Epon 1004 (Oilized Shell Epoxy Co., Bisphenol A-epichlorohydrin type epoxy resin, average molecular weight about 1400) Epoxy Resin b: Epon 1001 (Oilized Shell Epoxy Co., bisphenol A-epichlorohydrin type epoxy resin Polyester resin: Finedec M8010 (Dainippon Ink and hydroxyl group-containing polyester resin) Acrylic resin: Aromatech PD6300 (Mitsui Toatsu Co., glycidyl group-containing acrylic resin) Curing agent Curing agent for epoxy resin: EPICURE 108FF (Yukaka Shell Epoxy Co., amine type) Curing agent for polyester: IPD1-B1530 (Daicel Huls Co., isophorone diisocyanate blocked with ε-caprolactam) Hard for acrylic Agent: Dodecane diacid Pigment Coloring pigment: Titanium white JRNC (Titanium dioxide manufactured by Teikoku Chemical Co., Ltd.) Filler: S talc (manufactured by Nippon Talc, magnesium silicate) Additive additive a: Acronal 4F (manufactured by BASF) Agent b: Paintad M (manufactured by Dow Corning)
【００２３】表１中の広がり長さは、粉体塗料約０．８
ｇを直径１３mm高さ約４mmの円柱状になるように３０kg
/mm2加圧成型したものを１５０℃−１０分間加熱させた
時の平均直径を測定した数値である。The spread length in Table 1 is about 0.8 for the powder coating.
g is 30 kg so that it has a cylindrical shape with a diameter of 13 mm and a height of about 4 mm.
/ mm 2 This is a numerical value obtained by measuring the average diameter of a product obtained by pressure molding and heating it at 150 ° C for 10 minutes.
【００２４】[0024]
【表１】 [Table 1]
【００２５】実施例及び比較例 表２に記載の第１段目塗装用粉体塗料をパネルＡに硬化
膜厚が３０〜４０μmになるように静電塗装し、次いで
表２に記載の第２段目塗装用粉体塗料を硬化膜厚が３０
〜４０μm になるように静電塗装したのち熱風乾燥機で
１７０℃−３０分間加熱して塗膜を形成した。形成した
塗膜の仕上り性を評価した。Examples and Comparative Examples The powder coating material for the first stage coating shown in Table 2 was electrostatically coated on panel A so that the cured film thickness was 30 to 40 μm, and then the second coating material shown in Table 2 was used. Cured powder coating for step coating with a film thickness of 30
After electrostatically coating so as to have a thickness of -40 μm, it was heated at 170 ° C. for 30 minutes with a hot air dryer to form a coating film. The finish of the formed coating film was evaluated.
【００２６】次にパネルＢを用いて上記と同様の方法で
塗膜を形成した。形成した塗膜のエッジ防食性について
評価した。 パネルＡ：冷間圧延鋼板ＳＰＣＣ（幅１００mm×長さ３
００mm×厚さ０．８mm）をトルエンで脱脂したもの。こ
のパネルを仕上り性用に用いた。 パネルＢ：ドリル（φ１０mm刃）を用いて前記パネルＡ
の中央部に５mm間隔で５ケ所穴をあけて、裏面にエッジ
（バリ、突起）部のある穴を作成し、この裏面を被塗装
面として用いた。結果を表２に示す。Next, using Panel B, a coating film was formed in the same manner as above. The edge corrosion resistance of the formed coating film was evaluated. Panel A: Cold rolled steel plate SPCC (width 100 mm x length 3
(00 mm x thickness 0.8 mm) degreased with toluene. This panel was used for finishing. Panel B: Panel A using a drill (φ10 mm blade)
Holes were formed at 5 mm intervals at 5 mm intervals in the central part of, and holes having edges (burrs, protrusions) were formed on the back surface, and this back surface was used as the surface to be coated. The results are shown in Table 2.
【００２７】[0027]
【表２】 [Table 2]
【００２８】表２中の塗膜性能は下記基準に従って評価
した。 仕上り性 パネルＡに塗装した塗膜を目視で観察し、平滑性を調べ
た。 ◎ 平滑性に優れる。 ○ わずかに凹凸がある。 △ かなり凹凸がある × 凹凸がはげしい。 エッジ部防食性 パネルＢに塗装した塗膜を塩水噴霧試験（ＪＩＳ Ｚ−
２３７１）で７２Ｈおこなった。穴周辺のエッジ部（バ
リ、突起部）のサビの発生を調べた。 ◎ サビ発生なし。 ○ わずかにサビ発生。 △ かなりサビ発生。 × サビ発生著しい。The coating film performance in Table 2 was evaluated according to the following criteria. Finishing property The coating film applied to the panel A was visually observed to check the smoothness. ◎ Excellent smoothness. ○ Slightly uneven. △ There is considerable unevenness × The unevenness is severe. Edge portion anticorrosion property The coating film applied to panel B is subjected to a salt spray test (JIS Z-
2371) for 72 hours. The occurrence of rust on the edge portion (burrs, protrusions) around the hole was examined. ◎ No rust. ○ Slight rusting. △ Very rusty. × Rust is remarkable.
【００２９】[0029]
【発明の効果】本発明方法は上記した方法であることか
ら下記した効果を発揮する。 （１）エッジ部に対する塗膜の防食性が良い。 （２）タレ、ユズ膚などの塗装欠陥がなく仕上り外観が
良い。 （３）従来、２種類の粉体塗料を塗り重ね同時に焼付け
硬化させる方法においては、塗料の表面張力を下層の塗
膜を形成する塗料よりも上層の塗膜を形成する塗料を小
さくすることによって仕上り外観を改善することが行な
われている。しかしながら、該方法ではエッジ部に対す
る防食性が十分でないこと及び２種類の塗料の表面張力
を調製するだけでは仕上り外観が十分でないために、通
常、有機溶剤系又は水性塗料などの溶液型塗料の上に粉
体塗料が塗装されるように、塗料系の異なったものの組
合わせが行なわれており、工程が煩わしいことなどの欠
点がある。本発明の方法は、例えば同一系態である粉体
塗料を用いしかも一方に充填剤を含有させるだけで防食
性及び仕上り性に優れた塗膜が形成できるといった特徴
がある。Since the method of the present invention is the above-mentioned method, the following effects are exhibited. (1) The corrosion resistance of the coating film on the edge portion is good. (2) Finished appearance is good with no coating defects such as sagging or discoloration. (3) Conventionally, in the method of coating two types of powder coating materials and baking and curing them at the same time, the surface tension of the coating material is made smaller than that of the coating material of the lower layer by forming the coating material of the upper coating film smaller. Improvements in the finished appearance are being made. However, in this method, the anticorrosion property against the edge portion is not sufficient and the finished appearance is not sufficient by simply adjusting the surface tensions of the two kinds of paints. Therefore, it is usually applied on a solution type paint such as an organic solvent type or an aqueous paint. Since powder paints are applied to the above, combinations of different paint systems are carried out, and there is a drawback that the process is troublesome. The method of the present invention is characterized in that, for example, a powder coating material in the same system is used, and a coating film excellent in corrosion resistance and finish can be formed only by adding a filler to one side.
Claims (2)
０．８ｇを直径１３mm、高さ約４mmの円柱状になるよう
に３０kg/mm2加圧成型したものを１５０℃−１０分間加
熱フローさせた時の広がりの長さが平均直径１５〜２２
mmである粉体塗料を塗装し、次いで、２段目として、上
記と同様の方法で測定した加圧成型したものの広がりの
長さが平均直径２０〜４０mm、かつその広がり長さの差
が１段目よりも直径２mm以上大きい粉体塗料を塗装し、
続いてこれらの塗装膜を同時に焼付け硬化させることを
特徴とする粉体塗膜形成方法。1. A first stage, on the surface to be coated, of which 0.8 g of powder coating is pressure-molded into a cylinder having a diameter of 13 mm and a height of about 4 mm at 30 kg / mm 2 at 150 ° C. When heated and flowed for 10 minutes, the length of spread is 15 to 22 in average diameter.
mm of the powder coating, and then, as the second step, the spread length of the pressure-molded product measured by the same method as described above has an average diameter of 20 to 40 mm, and the spread length difference is 1 Apply powder paint that is 2 mm or more in diameter larger than the step,
Then, a method for forming a powder coating film, which comprises simultaneously baking and curing these coating films.
樹脂１００重量部に対して充填剤を２０〜２００重量部
含有するものである請求項１記載の粉体塗膜形成方法。2. The method for forming a powder coating film according to claim 1, wherein the powder coating material used as the first stage contains 20 to 200 parts by weight of the filler with respect to 100 parts by weight of the curable resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7101793A JPH06256692A (en) | 1993-03-04 | 1993-03-04 | Method for forming powder coating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7101793A JPH06256692A (en) | 1993-03-04 | 1993-03-04 | Method for forming powder coating film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06256692A true JPH06256692A (en) | 1994-09-13 |
Family
ID=13448332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7101793A Pending JPH06256692A (en) | 1993-03-04 | 1993-03-04 | Method for forming powder coating film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06256692A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11156292A (en) * | 1997-11-25 | 1999-06-15 | Dainippon Toryo Co Ltd | Method for coating iron structure with powdery coating material |
| JPH11179247A (en) * | 1997-12-25 | 1999-07-06 | Hitachi Metals Ltd | Electrostatic powder coating method and device |
| JPH11293152A (en) * | 1998-04-13 | 1999-10-26 | Mita Ind Co Ltd | Painted coating film |
| JP2002295736A (en) * | 2001-03-29 | 2002-10-09 | Kawasaki Steel Corp | Method for manufacturing coated steel pipe |
| JP2015515367A (en) * | 2012-03-21 | 2015-05-28 | ヴァルスパー・ソーシング・インコーポレーテッド | Double coating single cured powder coating |
| JP2016010740A (en) * | 2014-06-27 | 2016-01-21 | 日本ペイント・インダストリアルコ−ティングス株式会社 | Method of forming multi-layer coating film |
| US9751107B2 (en) | 2012-03-21 | 2017-09-05 | Valspar Sourcing, Inc. | Two-coat single cure powder coating |
| US10280314B2 (en) | 2012-03-21 | 2019-05-07 | The Sherwin-Williams Company | Application package for powder coatings |
-
1993
- 1993-03-04 JP JP7101793A patent/JPH06256692A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11156292A (en) * | 1997-11-25 | 1999-06-15 | Dainippon Toryo Co Ltd | Method for coating iron structure with powdery coating material |
| JPH11179247A (en) * | 1997-12-25 | 1999-07-06 | Hitachi Metals Ltd | Electrostatic powder coating method and device |
| JPH11293152A (en) * | 1998-04-13 | 1999-10-26 | Mita Ind Co Ltd | Painted coating film |
| JP2002295736A (en) * | 2001-03-29 | 2002-10-09 | Kawasaki Steel Corp | Method for manufacturing coated steel pipe |
| JP4631193B2 (en) * | 2001-03-29 | 2011-02-16 | Ｊｆｅスチール株式会社 | Method for producing coated steel pipe |
| JP2018103179A (en) * | 2012-03-21 | 2018-07-05 | ヴァルスパー・ソーシング・インコーポレーテッド | Two-coat single cure powder coating |
| US9751107B2 (en) | 2012-03-21 | 2017-09-05 | Valspar Sourcing, Inc. | Two-coat single cure powder coating |
| JP2015515367A (en) * | 2012-03-21 | 2015-05-28 | ヴァルスパー・ソーシング・インコーポレーテッド | Double coating single cured powder coating |
| US10280314B2 (en) | 2012-03-21 | 2019-05-07 | The Sherwin-Williams Company | Application package for powder coatings |
| JP2020099904A (en) * | 2012-03-21 | 2020-07-02 | ヴァルスパー・ソーシング・インコーポレーテッド | Double coating single cured powder coating |
| US10940505B2 (en) | 2012-03-21 | 2021-03-09 | The Sherwin-Williams Company | Two-coat single cure powder coating |
| US11098202B2 (en) | 2012-03-21 | 2021-08-24 | The Sherwin-Williams Company | Two-coat single cure powder coating |
| US20220033661A1 (en) * | 2012-03-21 | 2022-02-03 | The Sherwin-Williams Company | Two-coat single cure powder coating |
| EP2828418B1 (en) | 2012-03-21 | 2022-03-09 | Swimc Llc | Two-coat single cure powder coating |
| US20230024129A1 (en) * | 2012-03-21 | 2023-01-26 | The Sherwin-Williams Company | Two-coat single cure powder coating |
| US11904355B2 (en) | 2012-03-21 | 2024-02-20 | The Sherwin-Williams Company | Two-coat single cure powder coating |
| US11925957B2 (en) | 2012-03-21 | 2024-03-12 | The Sherwin-Williams Company | Two-coat single cure powder coating |
| JP2016010740A (en) * | 2014-06-27 | 2016-01-21 | 日本ペイント・インダストリアルコ−ティングス株式会社 | Method of forming multi-layer coating film |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100191980B1 (en) | Waterborne coating compositions having improved smoothness | |
| JP3211469B2 (en) | Matte powder coating composition, coating method and coating film | |
| JPH10507484A (en) | Filler components for use in aqueous primer lacquers | |
| JP2006239535A (en) | Multilayer coating film for body of car | |
| US5283084A (en) | Process for making wrinkle-free coating using solventborne clearcoat composition over waterborne basecoat composition | |
| JPH06256692A (en) | Method for forming powder coating film | |
| JP3368055B2 (en) | Thermosetting powder coating method | |
| JPH0810690A (en) | Method for formation of multilayer coating film, base coat composition and method for application thereof | |
| JP3919811B2 (en) | Base lacquer and method for direct coating of metal and plastic supports | |
| JPH06256714A (en) | Coating composition | |
| EP2545125A1 (en) | Powder coating having anodized look | |
| KR19990061667A (en) | Powder Coating Composition | |
| JP2883960B2 (en) | Waterborne intermediate coating | |
| JP3074008B2 (en) | Resin composition | |
| JPH06254482A (en) | Printing method | |
| JPH0411677A (en) | Top coating material for precoated metal | |
| JP2003192980A (en) | Bright color base composition for thermosetting solvent type coating used in 3-coat-1-bake finishing for aluminum wheel and coating film forming method using thereof | |
| ES2252232T3 (en) | PROCEDURE FOR THE PRODUCTION OF MULTI-COLORED LACQUERES AND / OR DECORATIVE EFFECT ON CAR BODIES OR ON PARTS OF THEM. | |
| JP2008081670A (en) | Powder coating composition | |
| JP3908008B2 (en) | Glittering paint composition, method for forming a glittering coating film, and coated article | |
| JP4162769B2 (en) | Coating film forming method and coating film | |
| JPH09316373A (en) | Automotive coating composition and method for coating | |
| JP2001334204A (en) | Method for forming pattern-coating film and coated material | |
| JP3001812B2 (en) | Automotive coating composition | |
| JPS6141257B2 (en) |