JP2506576B2 - Epoxy resin powder composition for electrostatic coating - Google Patents
Epoxy resin powder composition for electrostatic coatingInfo
- Publication number
- JP2506576B2 JP2506576B2 JP2416980A JP41698090A JP2506576B2 JP 2506576 B2 JP2506576 B2 JP 2506576B2 JP 2416980 A JP2416980 A JP 2416980A JP 41698090 A JP41698090 A JP 41698090A JP 2506576 B2 JP2506576 B2 JP 2506576B2
- Authority
- JP
- Japan
- Prior art keywords
- resin powder
- epoxy resin
- composition
- coating
- powder
- 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.)
- Expired - Lifetime
Links
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- Paints Or Removers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は静電塗装に好適なエポキ
シ樹脂粉体組成物に関するものである。FIELD OF THE INVENTION The present invention relates to an epoxy resin powder composition suitable for electrostatic coating.
【０００２】[0002]
【従来の技術及びその問題点】従来、樹脂粉体塗料は省
資源、省エネルギー、公害対策等の観点から種々の用途
に用いられてきている。一方、前記樹脂粉体塗料の塗装
方法には、流動浸漬法、静電塗装法、散布法等がある
が、中でも静電塗装法は膜厚の管理の容易性、被塗装物
の予熱不用等から近年普及しはじめている。しかしなが
ら静電塗装において、樹脂の溶融時の膜厚を２５０〜３
００μｍ以上にしようとすると、塗装時に樹脂粉体同士
が静電反発を起し、塗膜表面が凸凹になる欠点があり、
付着性の良好な樹脂、すなわち静電反発の起りにくい樹
脂粉体塗料の開発が待たれていた。2. Description of the Related Art Conventionally, resin powder coatings have been used for various purposes from the viewpoints of resource saving, energy saving, pollution control, and the like. On the other hand, the coating method of the resin powder paint includes a fluidized-bed coating method, an electrostatic coating method, a spraying method, etc. Among them, the electrostatic coating method is easy to control the film thickness, does not require preheating of an object to be coated, Since then, it has become popular. However, in electrostatic coating, the film thickness when the resin is melted is 250 to 3
If it is made to be more than 00 μm, there is a drawback that the resin powder particles cause electrostatic repulsion during coating and the coating film surface becomes uneven.
The development of a resin with good adhesion, that is, a resin powder coating that is less prone to electrostatic repulsion, has been awaited.
【０００３】[0003]
【発明が解決しようとする課題】本発明は従来の樹脂粉
体塗料に見られる前記問題点を解決し、静電塗装性に優
れた樹脂粉体塗料を提供することをその課題とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems found in conventional resin powder paints and to provide a resin powder paint excellent in electrostatic coatability.
【０００４】[0004]
【課題を解決するための手段】本発明者らは前記課題を
解決すべく鋭意研究を重ねた結果、粉体エポキシ樹脂組
成物に、アクリル樹脂粉体をドライブレンドしたエポキ
シ樹脂粉体塗料は静電塗装性に優れた樹脂粉体塗料にな
りうることを見い出し本発明を完成するに至った。即
ち、本発明によれば固形エポキシ樹脂と硬化剤を含有す
る粉体エポキシ樹脂組成物にアクリル樹脂粉体をドライ
ブレンドした樹脂粉体からなり、該アクリル樹脂粉体が
全樹脂粉体中０．０１〜５重量％であることを特徴とす
る静電塗装用エポキシ樹脂組成物が提供される。As a result of intensive studies to solve the above problems, the present inventors have found that an epoxy resin powder coating obtained by dry blending an acrylic resin powder with a powder epoxy resin composition is static. The inventors have found that it can be a resin powder coating having excellent electrocoatability, and completed the present invention. That is, according to the present invention, a powdery epoxy resin composition containing a solid epoxy resin and a curing agent is dry blended with an acrylic resin powder, and the acrylic resin powder is 0.1% of all resin powders. There is provided an epoxy resin composition for electrostatic coating, characterized in that it is from 0 to 5% by weight.
【０００５】以下、本発明を詳細に説明する。本発明で
用いられる固形エポキシ樹脂としては、この種のエポキ
シ樹脂組成物に一般に用いられているものが使用でき、
この様なものとしては、例えばビスフェノールＡ型、ビ
スフェノールＳ型、ビスフェノールＦ型、フェノールノ
ボラック型、クレゾールノボラック型の各エポキシ樹
脂、グリシジルエステル型エポキシ樹脂、グリシジルア
ミノ型エポキシ樹脂、脂環式エポキシ樹脂、線状脂肪族
エポキシ樹脂、複素環型エポキシ樹脂、ハロゲン化エポ
キシ樹脂等が挙げられる。これらのエポキシ樹脂は単独
または混合物の形で用いることができる。本発明で用い
られるエポキシ樹脂は室温で固形状を示せばよく、固形
状エポキシ樹脂に適量の液状エポキシ樹脂を混合した常
温で固体状を示すものであってもよい。The present invention will be described in detail below. As the solid epoxy resin used in the present invention, those generally used in this type of epoxy resin composition can be used,
Examples of such a resin include bisphenol A type, bisphenol S type, bisphenol F type, phenol novolac type, cresol novolac type epoxy resins, glycidyl ester type epoxy resins, glycidyl amino type epoxy resins, alicyclic epoxy resins, Examples thereof include linear aliphatic epoxy resins, heterocyclic epoxy resins, halogenated epoxy resins and the like. These epoxy resins can be used alone or in the form of a mixture. The epoxy resin used in the present invention may be solid at room temperature, or may be solid at room temperature by mixing a suitable amount of liquid epoxy resin with the solid epoxy resin.
【０００６】本発明で用いられる硬化剤としてはこの種
のエポキシ樹脂組成物に一般に用いられるもの、例えば
芳香族アミン系、酸無水物系、グアニジン系（ジシアン
ジアミド等）、イミダゾール系の硬化剤等が用いられ
る。本発明におけるエポキシ樹脂粉体組成物は前記成分
の他、必要に応じて充填剤、顔料等の公知の各種添加剤
を配合しても差し支えない。このエポキシ樹脂粉体組成
物は、静電塗装特性の向上の点から、その粒度を３〜１
８０μｍの範囲に、またその体積抵抗率を１０7Ω・ｃ
ｍ以上に保持する。The curing agent used in the present invention includes those generally used in this type of epoxy resin composition, for example, aromatic amine type, acid anhydride type, guanidine type (dicyandiamide etc.) and imidazole type curing agents. Used. The epoxy resin powder composition in the present invention may contain various known additives such as fillers and pigments, if necessary, in addition to the above components. This epoxy resin powder composition has a particle size of 3 to 1 from the viewpoint of improving electrostatic coating characteristics.
In the range of 80 μm and its volume resistivity is 10 7 Ω · c
Hold above m.
【０００７】本発明に使用するアクリル樹脂粉体として
は、平均粒径が０．０５〜１μｍ、好ましくは０．１５
〜０．６μｍのものを用いるのがよい。アクリル樹脂粉
体は、その種類によって、鉄との接触において、正に帯
電するものと、負に帯電するものがあり、それらのいず
れも本発明で用いることができる、また、それらの混合
物も使用できる。これらのアクリル樹脂粉体は、前記エ
ポキシ樹脂粉体組成物の帯電性に応じてドライブレンド
するのが好ましい。The acrylic resin powder used in the present invention has an average particle size of 0.05 to 1 μm, preferably 0.15.
It is preferable to use the one having a thickness of about 0.6 μm. Depending on the type of acrylic resin powder, there are those that are positively charged and those that are negatively charged when they come into contact with iron. Any of them can be used in the present invention, and a mixture thereof is also used. it can. These acrylic resin powders are preferably dry-blended depending on the chargeability of the epoxy resin powder composition.
【０００８】本発明においては、例えば、帯電性の良い
エポキシ樹脂粉体組成物には、負に帯電するアクリル樹
脂粉体、あるいは負に帯電するものと、正に帯電するも
のを任意の割合で混合したアクリル樹脂粉体を、また、
帯電性の比較的悪いエポキシ樹脂粉体組成物には、正に
帯電するアクリル樹脂粉体、あるいは正に帯電するもの
と負に帯電するものを任意の割合で混合したアクリル樹
脂粉体をドライブレンドするのがよい。アクリル樹脂と
しては、アクリル酸メタクリル酸のアルキルエステルの
重合体又は共重合体が用いられる。好ましくはポリメチ
ルメタクリレートや、ポリメチルアクリレートが用いら
れる。エポキシ樹脂粉体組成物とアクリル樹脂粉体の混
合割合はドライブレンド後の樹脂粉体中アクリル樹脂が
０．０１〜５重量％、特に好ましくは０．１〜１．０重
量％になるような割合である。In the present invention, for example, the epoxy resin powder composition having a good charging property is a negatively charged acrylic resin powder, or a negatively charged one and a positively charged one at any ratio. The mixed acrylic resin powder,
For the epoxy resin powder composition having a relatively poor charging property, a positively charged acrylic resin powder, or an acrylic resin powder obtained by mixing positively and negatively charged acrylic resin powders at an arbitrary ratio is dry-blended. Good to do. As the acrylic resin, a polymer or copolymer of an alkyl ester of methacrylic acid acrylate is used. Preferably, polymethylmethacrylate or polymethylacrylate is used. The mixing ratio of the epoxy resin powder composition and the acrylic resin powder is such that the acrylic resin in the resin powder after dry blending is 0.01 to 5% by weight, particularly preferably 0.1 to 1.0% by weight. It is a ratio.
【０００９】[0009]
【発明の効果】本発明のエポキシ樹脂粉体組成物は、静
電反発の少ない付着性の好良な樹脂塗料として、すなわ
ち、短時間、低電圧の条件で良好に塗装できる樹脂粉体
塗料として、極めてすぐれている。Industrial Applicability The epoxy resin powder composition of the present invention is used as a resin coating material having a small amount of electrostatic repulsion and good adhesiveness, that is, a resin powder coating material that can be satisfactorily applied for a short period of time at low voltage. , Very good.
【００１０】[0010]
【実施例】次に本発明を実施例によりさらに詳細に説明
する。 実施例１ 以下示す素材を表１に示す割合でドライブレンドして粉
体塗料を得た。次にこのようにして得た粉体塗料を以下
のようにしてその性能評価を行った。その結果を表１に
示す。 配合素材 （１）エポキシ樹脂粉体組成物 帯電性の良いエポキシ樹脂粉体組成物:エピフォームF-2
21(ソマール社製) 帯電性の比較的悪いエポキシ樹脂粉体組成物:エピフォ
ームＦ-220（ソマール社製) なお、上記エポキシ樹脂粉体組成物の帯電性の良し悪し
の評価は、静電スプレー塗装機トリボマチックモデルＡ
Ｈ−１（ノードソン社製）を使用し、粉体吐出エアー
１．５ｋｇ／ｃｍ2、粉体加速エアー３．５ｋｇ／ｃｍ2
で粉体を吐出させたときのチャージメータの値が、０．
６ｍＡより大きいものを帯電性の良い樹脂とし、０．６
ｍＡ以下のものは帯電性の比較的悪い樹脂とした。 （２）アクリル樹脂粉体 正帯電型アクリル樹脂粉体：ＭＰ−２７０１（綜研化学
社製）粒径０．３５〜０．５μｍ 負帯電型アクリル樹脂粉体：ＭＰ−１０００（綜研化学
社製）粒径０．３５〜０．５μｍ 性能評価 下記に示す形の素子（モーターアマチュア）に下記に示
す塗装機に一定の塗装条件で塗装し、素子に対する樹脂
の付着量及び素子のスロット内への樹脂の入り込みを調
べた。 （１）素子（モータアマチュア） スロット径：２９ｍｍ スロット長：４０ｍｍ スロット幅：２．０ｍｍ スロット数：１０ 粉体はスロット部分にのみ塗装した。 （２）塗装機 静電流動浸漬塗装機 （株）英布製モデル３００ （３）塗装条件 印加電圧：５０ｋｖ 流動エアー圧力：０．２ｋｇ／ｃｍ2 塗装時間：３０ｓｅｃ 素子のスロット内への樹脂の入り込みの評価方法は目視
により以下の２段評価法で行った。 ○：良好 ×：不良Next, the present invention will be described in more detail with reference to examples. Example 1 The following materials were dry blended in the proportions shown in Table 1 to obtain a powder coating material. Next, the performance of the powder coating thus obtained was evaluated as follows. Table 1 shows the results. Compounding material (1) Epoxy resin powder composition Epoxy resin powder composition with good electrostatic properties: Epiform F-2
21 (manufactured by Somar) Epoxy resin powder composition having relatively poor charging property: Epiform F-220 (manufactured by Somar) In addition, the evaluation of good or bad of charging property of the above-mentioned epoxy resin powder composition is electrostatic. Spray coating machine Tribomatic model A
H-1 (manufactured by Nordson) is used, powder discharge air 1.5 kg / cm 2 , powder acceleration air 3.5 kg / cm 2.
The value of the charge meter when the powder was discharged at.
A resin having a chargeability of more than 6 mA is set to 0.6.
Resins having mA or less were regarded as resins having a relatively poor charging property. (2) Acrylic resin powder Positively charged acrylic resin powder: MP-2701 (manufactured by Soken Chemical Industry Co., Ltd.) Particle size: 0.35 to 0.5 μm Negatively charged acrylic resin powder: MP-1000 (manufactured by Soken Chemical Industry Co., Ltd.) Particle size 0.35 to 0.5 μm Performance evaluation The element (motor armature) shown below was coated on the following coating machine under constant coating conditions, and the amount of resin adhered to the element and the resin in the slot of the element I checked the entry. (1) Element (motor amateur) Slot diameter: 29 mm Slot length: 40 mm Slot width: 2.0 mm Slot number: 10 Powder was applied only to the slot portion. (2) Coating machine Electrostatic fluidized dipping coating machine Model 300 manufactured by Eifu Co., Ltd. (3) Coating conditions Applied voltage: 50 kv Flowing air pressure: 0.2 kg / cm 2 Coating time: 30 sec Insertion of resin into the slot of the element The evaluation method was conducted by visual inspection according to the following two-step evaluation method. ○: good ×: bad
【００１１】[0011]
【表１】 [Table 1]
【００１２】実施例２ 実施例１における実験Ｎｏ．３，６において、塗装時間
のみを３０ｓｅｃから１５０ｓｅｃまでに変更した以外
は同様にして実験を行い、塗装時間の変化に対する付着
量を測定した。その結果を表２に示す。Example 2 Experiment No. 1 in Example 1 In Nos. 3 and 6, the same experiment was carried out except that only the coating time was changed from 30 sec to 150 sec, and the adhesion amount with respect to the change in coating time was measured. The results are shown in Table 2.
【００１３】[0013]
【表２】 [Table 2]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渡辺 健 東京都中央区銀座四丁目11番２号 ソマ ール株式会社内 (72)発明者 北川 勝治 東京都中央区銀座四丁目11番２号 ソマ ール株式会社内 (56)参考文献 特開 昭56−24467（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ken Watanabe 4-11-2 Ginza, Chuo-ku, Tokyo Somer Co., Ltd. (72) Inventor Katsuji Kitagawa 4-11-2 Ginza, Chuo-ku, Tokyo Soma (56) References JP-A-56-24467 (JP, A)
Claims (3)
体エポキシ樹脂組成物に、アクリル樹脂粉体をドライブ
レンドした樹脂粉体からなり、該アクリル樹脂粉体が全
樹脂粉体中０．０１〜５重量％であることを特徴とする
静電塗装用エポキシ樹脂粉体組成物。1. A powder epoxy resin composition containing a solid epoxy resin and a curing agent, which is a resin powder obtained by dry blending an acrylic resin powder, wherein the acrylic resin powder is 0.01% of the total resin powder. The epoxy resin powder composition for electrostatic coating is characterized in that the content is 5 wt%.
１８０μｍ、体積抵抗率が１０7Ω・ｃｍ以上である請
求項１の静電塗装用エポキシ樹脂組成物。2. The particle size of the epoxy resin powder composition is 3 to.
The epoxy resin composition for electrostatic coating according to claim 1, which has a volume resistivity of 180 μm and is 10 7 Ω · cm or more.
５〜１μｍである請求項１又は２の静電塗装用エポキシ
樹脂組成物。3. The average particle size of the acrylic resin powder is 0.0
The epoxy resin composition for electrostatic coating according to claim 1 or 2, which has a thickness of 5 to 1 μm.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2416980A JP2506576B2 (en) | 1990-12-28 | 1990-12-28 | Epoxy resin powder composition for electrostatic coating |
| US07/811,137 US5204387A (en) | 1990-12-28 | 1991-12-20 | Epoxy powder coating composition for use in electrostatic coating |
| CA002058187A CA2058187A1 (en) | 1990-12-28 | 1991-12-20 | Epoxy powder coating composition for use in electrostatic coating |
| DE69118150T DE69118150T2 (en) | 1990-12-28 | 1991-12-23 | Epoxy powder coating composition that can be used for electrostatic coating |
| SG1996003046A SG48852A1 (en) | 1990-12-28 | 1991-12-23 | Epoxy powder coating composition for use in electrostatic coating |
| EP91311960A EP0493076B1 (en) | 1990-12-28 | 1991-12-23 | Epoxy powder coating composition for use in electrostatic coating |
| KR1019910024851A KR0148581B1 (en) | 1990-12-28 | 1991-12-28 | Epoxy powder coating composition for use in electrostatic coating |
| US07/960,815 US5319002A (en) | 1990-12-28 | 1992-10-14 | Epoxy powder coating composition for use in electrostatic coating |
| HK206896A HK206896A (en) | 1990-12-28 | 1996-11-14 | Epoxy powder coating composition for use in electrostatic coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2416980A JP2506576B2 (en) | 1990-12-28 | 1990-12-28 | Epoxy resin powder composition for electrostatic coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04249585A JPH04249585A (en) | 1992-09-04 |
| JP2506576B2 true JP2506576B2 (en) | 1996-06-12 |
Family
ID=18525145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2416980A Expired - Lifetime JP2506576B2 (en) | 1990-12-28 | 1990-12-28 | Epoxy resin powder composition for electrostatic coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2506576B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5624467A (en) * | 1979-08-06 | 1981-03-09 | Nippon Paint Co Ltd | Pattern coating composition |
| JP2840953B2 (en) * | 1988-12-29 | 1998-12-24 | 日本ペイント株式会社 | Powder paint |
| JPH02178362A (en) * | 1988-12-29 | 1990-07-11 | Nippon Paint Co Ltd | Powder coating |
| JPH02178361A (en) * | 1988-12-29 | 1990-07-11 | Nippon Paint Co Ltd | Powder coating |
-
1990
- 1990-12-28 JP JP2416980A patent/JP2506576B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04249585A (en) | 1992-09-04 |
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