JPH08295828A - Powder baking coating - Google Patents
Powder baking coatingInfo
- Publication number
- JPH08295828A JPH08295828A JP12306995A JP12306995A JPH08295828A JP H08295828 A JPH08295828 A JP H08295828A JP 12306995 A JP12306995 A JP 12306995A JP 12306995 A JP12306995 A JP 12306995A JP H08295828 A JPH08295828 A JP H08295828A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- coating
- fluororesin
- polyester
- coating film
- 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]
【産業上の利用分野】本発明ははっ水性潤滑性耐候性に
優れ、かつ長期間使用に耐え得る防食粉体塗料に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anticorrosive powder coating having excellent water repellency, lubricity and weather resistance, and capable of withstanding long-term use.
【０００２】[0002]
【従来の技術】２種以上の粉体塗料を混合し、その各々
の利点を用い、不利な点を補うような粉体塗料を作るこ
とは周知である。例えば、エポキシ樹脂粉末に不飽和ポ
リエステル樹脂粉末を混合してなるものは、これであ
る。2. Description of the Related Art It is well known to mix two or more powder coatings and use their respective advantages to make powder coatings that make up for the disadvantages. For example, this is a mixture of epoxy resin powder and unsaturated polyester resin powder.
【０００３】また、はっ水性、潤滑性を求める目的でフ
ッ素系樹脂粉末を一般の樹脂粉体塗料に混合することも
可能である。ただし、この場合、フッ素系樹脂粉末は融
点が３２７℃と高く、例えばエポキシ樹脂、不飽和ポリ
エステル樹脂、アクリル樹脂、ウレタン樹脂、ナイロン
樹脂等はいずれも２５０℃以上では分解を開始してしま
うので、これ以下の温度で加工を行わねばならないた
め、フッ素樹脂粉末は溶融せず、被膜中に残存すること
になる。そのため、本来の性能を十分に発揮できず、ま
た性能を上げるためにはフッ素樹脂粉末の混合比率を多
くしなければならないという問題がある。Further, it is possible to mix a fluororesin powder with a general resin powder coating material for the purpose of obtaining water repellency and lubricity. However, in this case, the melting point of the fluorine-based resin powder is as high as 327 ° C., and for example, epoxy resin, unsaturated polyester resin, acrylic resin, urethane resin, nylon resin, etc. all start to decompose at 250 ° C. or higher, Since the processing must be carried out at a temperature below this, the fluororesin powder will not melt and will remain in the coating. Therefore, there is a problem that the original performance cannot be sufficiently exhibited and that the mixing ratio of the fluororesin powder must be increased in order to improve the performance.
【０００４】[0004]
【発明が解決しようとする課題】以上に鑑み、本発明に
おいては、はっ水性潤滑性を付与するフッ素系樹脂粉末
と基材となるべき樹脂粉末の溶融温度または加工温度が
同一あるいは近似になるが如き素材を提供し、さらにま
たフッ素樹脂粉末が被膜表面に効率良く集まることがで
きれば従来の問題を十分解決することに想到した。In view of the above, in the present invention, the melting temperature or processing temperature of the fluororesin powder which imparts the water-repellent lubricity and the resin powder to be the base material are the same or similar. It was conceived that the conventional problems would be sufficiently solved if the fluororesin powder could be efficiently collected on the coating surface by providing such a material.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するた
め、本発明による粉体焼付塗料は、イソフタル酸成分８
−２０モル％、固有粘度０．７〜１．０の熱可塑性結晶
性ポリエチレンテレフタレート系重合体よりなる１５〜
１００当量／１０6ｇの末端カルボキシル基を有したポ
リエステル系重合体の粉末に、分子量５００〜２０００
０で、かつ末端までフッ素化した分子量の四フッ化エチ
レン樹脂粉末を重量比で０．５〜２０％の範囲内で混合
分散させてなるはっ水性、潤滑性、防食性を同時に有す
ることを特徴とするものである。In order to solve the above problems, the powder baking paint according to the present invention comprises an isophthalic acid component 8
15 to 20 composed of a thermoplastic crystalline polyethylene terephthalate-based polymer having a -20 mol% and an intrinsic viscosity of 0.7 to 1.0
100 equivalent / 10 6 g of polyester-based polymer powder having a terminal carboxyl group has a molecular weight of 500 to 2000.
It has water repellency, lubricity and anticorrosion at the same time, which is obtained by mixing and dispersing tetrafluoroethylene resin powder having a molecular weight of 0 and fluorinated up to the terminal within a range of 0.5 to 20% by weight. It is a feature.
【０００６】フッ素樹脂系粉末は分子量５００〜２００
００で、かつ末端までフッ素化された低分子量の四フッ
素化エチレン樹脂粉末を用いる。平均分子量が５００未
満であると、水との接触角が小さくなり、一方１０００
０を越えると同様に水との接触角が小さくなるととも
に、耐候性にも問題を生じる。The fluororesin powder has a molecular weight of 500 to 200.
A low molecular weight tetrafluorinated ethylene resin powder having a fluorination value of 00 and being fluorinated up to the end is used. When the average molecular weight is less than 500, the contact angle with water becomes small, while on the other hand 1000
When it exceeds 0, the contact angle with water becomes small and the weather resistance also becomes problematic.
【０００７】また基材となるべき飽和ポリエステル樹脂
粉体塗料はイソフタル酸成分８〜２０モル％、固有粘度
０．７〜１．０の熱可塑性結晶性ポリエチレンテレフタ
レート系重合体よりなる１５〜１００当量／１０6ｇの
末端カルボキシル基を有した飽和ポリエステル樹脂粉体
を用いる。The saturated polyester resin powder coating material to be used as the base material is 15 to 100 equivalents of a thermoplastic crystalline polyethylene terephthalate polymer having an isophthalic acid component of 8 to 20 mol% and an intrinsic viscosity of 0.7 to 1.0. / 10 6 g of saturated polyester resin powder having a terminal carboxyl group is used.
【０００８】この二つの特定された樹脂粉体を使用する
所似は、１つは温度条件にある。すなわち本発明に使用
される低分子量四フッ化エチレン樹脂は分子量によって
相違はあるが低いもので約２８０℃、高いもので３５０
℃で溶融する。一方、本発明の飽和ポリエステル粉末は
約２６０℃で溶融するが加工温度は高く、約３５０℃で
も十分分解せずに被膜を形成することが可能である。す
なわち、同じ条件で加工ができるわけで、これは他の樹
脂の混合では絶対にできないことである。The analogy of using these two specified resin powders is one in temperature conditions. That is, the low molecular weight tetrafluoroethylene resin used in the present invention varies depending on the molecular weight, but is low at about 280 ° C. and high at 350 ° C.
Melt at ° C. On the other hand, the saturated polyester powder of the present invention melts at about 260 ° C., but the processing temperature is high, and even at about 350 ° C., a film can be formed without being sufficiently decomposed. That is, processing can be performed under the same conditions, which is absolutely impossible by mixing other resins.
【０００９】第二の好ましい条件としては本発明による
飽和ポリエステルの溶融温度２６０℃に対し本発明によ
る四フッ化エチレン樹脂粉末は低いものでも約２０℃高
いので、前記ポリエステルが溶融してもすぐには溶融せ
ず粉末として存在する。前記ポリエステルは溶融すると
粘度が低くなり、ほとんど水に近い状態になるので、残
存している四フッ化エチレン樹脂粉末は容易に上部表面
へ脱出し集まり、所定の温度に達するとそこで溶融す
る。これが固定化すればポリエステル被膜の上にフッ素
樹脂被膜が重なった、いわゆる二重構造の被膜が形成さ
れる次第である。The second preferable condition is that the melting temperature of the saturated polyester according to the present invention is 260 ° C., but the tetrafluoroethylene resin powder according to the present invention is higher by about 20 ° C. even if it is low. Exists as a powder without melting. Since the viscosity of the polyester becomes low when it melts and becomes almost like water, the remaining tetrafluoroethylene resin powder easily escapes to the upper surface and collects, and when it reaches a predetermined temperature, it melts there. If this is fixed, a so-called double-structured film in which a fluororesin film is superposed on the polyester film is formed.
【００１０】[0010]
【作用】上記のこの行動は想像以上にスムーズに行われ
るため、無駄なく大変効率的である。したがって、四フ
ッ化エチレン樹脂粉末のポリエステル粉末に対する混合
比率を多くする必要はない。The above-mentioned action is carried out more smoothly than expected, and is very efficient with no waste. Therefore, it is not necessary to increase the mixing ratio of the tetrafluoroethylene resin powder to the polyester powder.
【００１１】従来のものでは、少なくとも２０〜６０％
に近い混合比率が必要であるのに対し、本発明において
は２０％以下の比率で十分目的を達成できる。２０％を
越えると表面にクラックが入ったりザラついたりむしろ
悪い影響を生ずる。すなわち本発明における四フッ化エ
チレン樹脂粉末は０．５〜２０％（重量比）添加され
る。０．５％未満であると、静止摩擦係数が十分に小さ
くならず、また潤滑性が十分に良好にならない恐れがあ
る。In the prior art, at least 20-60%
While a mixing ratio close to is necessary, in the present invention, a ratio of 20% or less can sufficiently achieve the object. If it exceeds 20%, the surface may be cracked or rough, and rather adverse effects may occur. That is, 0.5 to 20% (weight ratio) of the tetrafluoroethylene resin powder in the present invention is added. If it is less than 0.5%, the static friction coefficient may not be sufficiently small, and the lubricity may not be sufficiently good.
【００１２】一例として１０％の混合比率で加工した被
膜は、実験によると初期接触角は１６０゜、紫外線を６
００時間照射した後でも１５７゜という高い安定性を示
した。また、このサンプルにより、ポリエステル被膜の
密着度を測定したところ１５０ｋｇｆ／ｃｍ2（ＡＤＨ
ＥＳＩＯＮ ＴＥＳＴＥＲ法に準ずる）という高い密着
力を得た。これはエポキシ樹脂の密着力３０〜５０ｋｇ
ｆ／ｃｍ2に比べ３〜５倍の数値である。As an example, a coating processed at a mixing ratio of 10% has an initial contact angle of 160 ° and an ultraviolet ray of 6
Even after irradiation for 00 hours, it showed a high stability of 157 °. Also, the adhesion of the polyester film was measured with this sample, and was 150 kgf / cm 2 (ADH
High adhesion was obtained (according to ESION TESTER method). This is the adhesion of epoxy resin 30-50kg
The value is 3 to 5 times as large as that of f / cm 2 .
【００１３】また、１〜１０％の混合比率にて加工した
被膜の静止摩擦係数は図１の如くなり、いずれもポリエ
ステル樹脂に比較して小さな値となっている。特に混合
比率７％の四フッ化エチレン樹脂粉末を含むポリエステ
ル樹脂においては、静止摩擦係数が０．０４とポリエス
テル樹脂の０．２に比較して極めて小さくなっている。Further, the static friction coefficient of the coating film processed at the mixing ratio of 1 to 10% is as shown in FIG. 1, which is smaller than that of the polyester resin. Particularly, in the polyester resin containing the tetrafluoroethylene resin powder with the mixing ratio of 7%, the static friction coefficient is 0.04, which is extremely small as compared with 0.2 of the polyester resin.
【００１４】これにより、本発明の製品は良好なはっ水
性、潤滑性を保持して、長期に安定した製品を得られる
ことになり、非常に有益な発明である。As a result, the product of the present invention retains good water repellency and lubricity, and a stable product for a long period of time can be obtained, which is a very useful invention.
【００１５】[0015]
【実施例】鉄板５０×１００×３tｍｍのサンプル板を
用意する。前記ポリエステル樹脂粉末塗料をグレーに着
色する。Example A sample plate of iron plate 50 × 100 × 3 t mm is prepared. The polyester resin powder paint is colored gray.
【００１６】本記四フッ化エチレン樹脂粉末で分子量８
０００のものを重量比で７％ポリエステル樹脂粉末中に
混合し、良く撹拌する。この粉体塗料を流動浸漬槽中に
入れ流動させる。The molecular weight of this tetrafluoroethylene resin powder is 8
000 is mixed in 7% by weight of polyester resin powder and stirred well. The powder coating material is placed in a fluidized dipping tank and fluidized.
【００１７】鉄板のサンプル板を３５０℃に加熱し、こ
の流動槽中に入れる。４秒で取り出し所定の場所につる
す。するとまず表面は融けて艶のあるグレーの被膜とな
る。１０秒位の間にこの表面の艶がなくなり、グレーの
色が薄れる。すなわちフッ素樹脂粉末が表面に集中して
きたのである。さらに１０秒ほど静置しておくと再び表
面は艶がでてくる。フッ素樹脂粉末が溶融しはじめたの
である。一様に艶がでたところで水冷し固化させる。A sample plate of an iron plate is heated to 350 ° C. and placed in this fluidized tank. Remove in 4 seconds and hang in place. The surface then melts into a glossy gray coating. The gloss of this surface disappears and the gray color fades in about 10 seconds. That is, the fluororesin powder was concentrated on the surface. The surface becomes glossy again when left for 10 seconds. The fluororesin powder began to melt. When uniformly glossy, water-cool to solidify.
【００１８】これで二重構造の被膜の出来上がりであ
る。このサンプル製品は、所定の如く接触角１６０゜の
値を得た。This completes the coating having the double structure. The sample product obtained a contact angle of 160 ° as desired.
【００１９】[0019]
【発明の効果】以上説明したように、本発明による粉体
焼付塗料は、発水性、潤滑性を付与するフッ素樹脂粉末
と基材となる樹脂粉末の溶融温度又は加工温度が同一あ
るいは近似しており、かつ本発明により使用されるポリ
エステルは溶融すると粘度が低くなるため、ポリエステ
ル被覆上にフッ素樹脂被膜が重なった二重構造の被覆が
形成される。このため、発水性、潤滑性、防食性に優れ
た粉体焼付塗料となると言う利点がある。As described above, in the powder baking coating according to the present invention, the melting temperature or processing temperature of the fluororesin powder for imparting water repellency and lubricity and the resin powder as the base material are the same or similar. In addition, since the polyester used according to the present invention has a low viscosity when melted, a coating having a double structure in which a fluororesin coating is superposed on the polyester coating is formed. For this reason, there is an advantage that it becomes a powder baking coating excellent in water repellency, lubricity and anticorrosion.
【図１】ポリエステル樹脂にフッ素樹脂を添加量を変化
させて添加して焼付塗料としたときの静止摩擦係数を示
した図。FIG. 1 is a diagram showing a coefficient of static friction when a fluororesin is added to a polyester resin in various amounts to form a baking coating.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 斎藤 博之 東京都千代田区内幸町１丁目１番６号 日 本電信電話株式会社内 (72)発明者 高井 健一 東京都千代田区内幸町１丁目１番６号 日 本電信電話株式会社内 (72)発明者 中越 千吉 東京都世田谷区桜上水１−１−４−709 (72)発明者 中越 吉雄 東京都葛飾区青戸３−９−１−316 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Hiroyuki Saito 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Kenichi Takai 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihonhon Telegraph and Telephone Corporation (72) Inventor Chikichi Nakagoshi 1-1-4-709 Sakurajosui, Setagaya-ku, Tokyo (72) Inventor Yoshio Nakagetsu 3-9-1-316 Aoto, Katsushika-ku, Tokyo
Claims (1)
度０．７〜１．０の熱可塑性結晶性ポリエチレンテレフ
タレート系重合体よりなる１５〜１００当量／１０6ｇ
の末端カルボキシル基を有したポリエステル系重合体の
粉末に、分子量５００〜２００００で、かつ末端までフ
ッ素化した分子量の四フッ化エチレン樹脂粉末を重量比
で０．５〜２０％の範囲内で混合分散させてなるはっ水
性、潤滑性、防食性を同時に有する粉体焼付塗料。1. 15 to 100 equivalents / 10 6 g of a thermoplastic crystalline polyethylene terephthalate polymer having an isophthalic acid component of 8 to 20 mol% and an intrinsic viscosity of 0.7 to 1.0.
The polyester polymer powder having a terminal carboxyl group is mixed with a tetrafluoroethylene resin powder having a molecular weight of 500 to 20000 and having a molecular weight of fluorinated up to the terminal within a range of 0.5 to 20% by weight. A powder baking coating that is dispersed and has water repellency, lubricity, and corrosion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12306995A JPH08295828A (en) | 1995-04-24 | 1995-04-24 | Powder baking coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12306995A JPH08295828A (en) | 1995-04-24 | 1995-04-24 | Powder baking coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08295828A true JPH08295828A (en) | 1996-11-12 |
Family
ID=14851429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12306995A Pending JPH08295828A (en) | 1995-04-24 | 1995-04-24 | Powder baking coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08295828A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0899313A1 (en) * | 1997-08-26 | 1999-03-03 | Dupont-Mitsui Fluorochemicals Co., Ltd. | Tetrafluoroethylene copolymer composition for coating metal articles |
| JP2012514662A (en) * | 2009-01-06 | 2012-06-28 | エーヴァルト デルケン アーゲー | Method for producing coated powder and coated powder |
| JP2012158705A (en) * | 2011-02-02 | 2012-08-23 | Nippon Telegr & Teleph Corp <Ntt> | Powder coating |
-
1995
- 1995-04-24 JP JP12306995A patent/JPH08295828A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0899313A1 (en) * | 1997-08-26 | 1999-03-03 | Dupont-Mitsui Fluorochemicals Co., Ltd. | Tetrafluoroethylene copolymer composition for coating metal articles |
| JP2012514662A (en) * | 2009-01-06 | 2012-06-28 | エーヴァルト デルケン アーゲー | Method for producing coated powder and coated powder |
| KR101332221B1 (en) * | 2009-01-06 | 2013-11-25 | 에발트 되르켄 아.게. | Method for producing a powder coatiing |
| JP2012158705A (en) * | 2011-02-02 | 2012-08-23 | Nippon Telegr & Teleph Corp <Ntt> | Powder coating |
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