JP2002069334A - Method for producing powder coating - Google Patents
Method for producing powder coatingInfo
- Publication number
- JP2002069334A JP2002069334A JP2000254308A JP2000254308A JP2002069334A JP 2002069334 A JP2002069334 A JP 2002069334A JP 2000254308 A JP2000254308 A JP 2000254308A JP 2000254308 A JP2000254308 A JP 2000254308A JP 2002069334 A JP2002069334 A JP 2002069334A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- powder coating
- producing
- fine
- coating
- 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
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- Processes Of Treating Macromolecular Substances (AREA)
- Paints Or Removers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粉体塗料の製造方
法に関し、特に、粉体塗料製造の際に副製する微細副製
粉末を再利用して、粉体塗料を製造する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a powder coating, and more particularly, to a method for producing a powder coating by reusing fine by-product powder produced by the process of producing a powder coating.
【０００２】[0002]
【従来の技術】現在、産業の各分野において、世界的に
省資源化又は資源の有効利用が図られている。ところ
で、揮発物の殆どない粉体塗料は、環境汚染の恐れの少
ない塗料として近年大きな脚光を浴びている。しかし、
溶融混練工程及び粉砕工程を採用する乾式粉体塗料の製
造方法においては、粉砕工程で発生する微細副製粉末
は、かさ比重が非常に小さいため、そのまま粉体塗料用
原料組成物に混合又は混練を行っても、混練機への流入
量が少なく、生産性が著しく低くなり、更に、混練機中
での滞留時間が増大して、塗料組成物の熱履歴を著しく
増大させるため、塗膜性能が劣化し易く、単独で使用す
る場合には、スピットの発生や、流動性の悪化等の塗装
作業面での問題が生じ易い。そのため、これらの微細副
製粉末は、塗料として使用することができないので、こ
れまで廃棄せざるを得なかった。また、微細副製粉末
は、粉体塗料の歩留まりの低下を招くだけでなく、廃棄
にかかる費用が粉体塗料の価格を上昇させる一要因とも
なっていた。2. Description of the Related Art At present, in various industrial fields, resource saving or effective use of resources is being promoted worldwide. By the way, powder coatings with almost no volatiles have recently attracted much attention as coatings with less risk of environmental pollution. But,
In the method for producing a dry powder coating that employs a melt-kneading step and a pulverizing step, the fine secondary powder generated in the pulverizing step has a very low bulk specific gravity, and thus is directly mixed or kneaded with the raw material composition for the powder coating. However, the flow rate into the kneading machine is small, the productivity is extremely low, the residence time in the kneading machine is increased, and the heat history of the coating composition is significantly increased. Is easily deteriorated, and when used alone, problems in the painting work such as generation of spits and deterioration of fluidity are likely to occur. For this reason, these fine by-product powders cannot be used as paints, and have to be discarded until now. In addition, the fine secondary powder not only lowers the yield of the powder coating, but also the cost of disposal is one factor that increases the price of the powder coating.
【０００３】[0003]
【発明が解決しようとする課題】従って、本発明は、塗
膜特性を劣化させることなく、資源を有効利用できる経
済的な粉体塗料の製造方法を提供することを目的とす
る。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an economical method for producing a powder coating material which can effectively utilize resources without deteriorating the characteristics of the coating film.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、上記課題
を解決するため鋭意検討を行った結果、微細副製粉末を
高温雰囲気中を通過させることにより、表面を融着させ
て粉体造粒を行い、分級、弱粉砕した後、粉体塗料用原
料組成物として使用することが出来ることを見出し、本
発明に到達したものである。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, the fine secondary powder was passed through a high-temperature atmosphere to fuse the surface to obtain the powder. After granulation, classification and weak pulverization, they have found that they can be used as a raw material composition for powder coatings, and have reached the present invention.
【０００５】即ち、本発明の粉体塗料の製造方法は、粉
体塗料用原料組成物の混練後の粉砕工程で副製する微細
粉体状の副製粉末から粉体塗料を製造する方法であっ
て、前記微細副製粉末を高温雰囲気中を通過させること
により、互いに接触、融着させて粉体造粒を行い、次い
で前記造粒粉体を分級、弱粉砕した後、前記粉体塗料用
原料組成物として使用することを特徴とする。That is, the method for producing a powder coating according to the present invention is a method for producing a powder coating from a fine powder secondary powder produced in a pulverizing step after kneading a raw material composition for a powder coating. Then, by passing the fine by-product powder through a high-temperature atmosphere, the powder is granulated by contacting and fusing with each other, then classifying and weakly pulverizing the granulated powder, and then applying the powder coating. It is characterized by being used as a raw material composition.
【０００６】[0006]
【発明の実施の形態】以下、本発明について、詳細に説
明する。本発明で使用する粉体塗料用原料組成物は、粉
体塗料の製造に使用される、樹脂、硬化剤、顔料、並び
に必要に応じて加えられる添加剤からなる。本発明の方
法は、従来から実施されている粉体塗料の製造に対して
広く適用できる。従って、本発明で使用される粉体塗料
用原料組成物は、従来より粉体塗料の製造に使用されて
いるものを特に制限されることなく各種使用することが
できる。即ち、粉体塗料用原料組成物に使用される樹脂
として、従来から粉体塗料の製造に用いられている各種
の樹脂を使用することができる。このような樹脂として
は、例えば、ポリエステル−ウレタン硬化系樹脂や、エ
ポキシ−ポリエステル硬化系樹脂、エポキシ系樹脂、ア
クリル系樹脂、アクリル−ポリエステル系樹脂フッ素系
樹脂、アクリル−ウレタン硬化系樹脂、アクリル−メラ
ミン硬化系樹脂、ポリエステル−メラミン硬化系樹脂等
が挙げられ、これら樹脂を単独又は２種以上組み合わせ
で使用することができる。必要に応じて、ノボラック樹
脂や、フェノキシ樹脂、ブチラール樹脂、ケトン樹脂、
ポリエステル樹脂、ロジン等の改質樹脂、エポキシ化
油、ジオクチルフタレート等の可塑剤を適宜使用するこ
とができる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The raw material composition for a powder coating used in the present invention comprises a resin, a curing agent, a pigment, and additives that are added as needed, which are used in the production of the powder coating. The method of the present invention can be widely applied to the conventional production of powder coatings. Therefore, the raw material composition for powder coatings used in the present invention can be variously used without particular limitation, which has been conventionally used for producing powder coatings. That is, as the resin used in the raw material composition for a powder coating, various resins conventionally used in the production of powder coatings can be used. As such a resin, for example, polyester-urethane curable resin, epoxy-polyester curable resin, epoxy resin, acrylic resin, acrylic-polyester resin fluororesin, acrylic-urethane curable resin, acrylic- Melamine-curable resins, polyester-melamine-curable resins and the like can be mentioned, and these resins can be used alone or in combination of two or more. If necessary, novolak resin, phenoxy resin, butyral resin, ketone resin,
Modified resins such as polyester resins and rosin, epoxidized oils, and plasticizers such as dioctyl phthalate can be used as appropriate.
【０００７】硬化剤としては、例えば、熱硬化性樹脂に
通常使用される硬化剤を特に制限なく各種使用すること
ができる。このような硬化剤としては、例えば、アミド
化合物や、酸無水物、二塩基酸、グリシジル化合物、ア
ミノプラスト樹脂、ブロックイソシアネート等があり、
代表的なものにジシアンジアミド、酸ヒドラジド、トリ
グリシジルイソシアヌレート、イソホロンジイソシアネ
ートブロック体等が挙げられる。例えば、二塩基酸とし
ては、アジピン酸や、ピメリン酸、スベリン酸、セバシ
ン酸、１，１０−デカンジカルボン酸、１，１２−ドデ
カンジカルボン酸、１，２０−エイコサンジカルボン
酸、ヘキサヒドロフタル酸、マレイン酸、フタル酸、シ
クロヘキセン１，２−ジカルボン酸等が挙げられる。本
発明で用いる顔料としては、例えば、二酸化チタン、ベ
ンガラ、酸化鉄、亜鉛末粉、カーボンブラック、フタロ
シアニンブルー、フタロシアニングリーン、キナクリド
ン系顔料、アゾ系顔料、イソインドリノン系顔料、各種
焼成顔料等の着色顔料、シリカ、タルク、硫酸バリウ
ム、炭酸カルシウム、ガラスフレーク等の体質顔料があ
る。As the curing agent, for example, various curing agents commonly used for thermosetting resins can be used without particular limitation. Examples of such a curing agent include amide compounds, acid anhydrides, dibasic acids, glycidyl compounds, aminoplast resins, and blocked isocyanates.
Representative examples include dicyandiamide, acid hydrazide, triglycidyl isocyanurate, and isophorone diisocyanate block. For example, dibasic acids include adipic acid, pimelic acid, suberic acid, sebacic acid, 1,10-decanedicarboxylic acid, 1,12-dodecanedicarboxylic acid, 1,20-eicosandicarboxylic acid, hexahydrophthalic acid , Maleic acid, phthalic acid, cyclohexene 1,2-dicarboxylic acid and the like. Examples of the pigment used in the present invention include titanium dioxide, red iron oxide, iron oxide, zinc dust, carbon black, phthalocyanine blue, phthalocyanine green, quinacridone pigments, azo pigments, isoindolinone pigments, and various calcined pigments. There are coloring pigments, extenders such as silica, talc, barium sulfate, calcium carbonate, and glass flakes.
【０００８】更に任意に添加することのできる添加剤と
しては、タレ防止剤、表面調整剤、架橋促進剤、紫外線
吸収剤、光安定剤、抗酸化剤等を挙げることができる。
本発明で使用する微細副製粉末は、粉体塗料用原料組成
物を所定の粒径に粉砕する際に副製する微細な粉体であ
る。このような微細副製粉末は、粉砕された粒度の小さ
いものだけでなく、粉砕工程で捕集されずに排気され
て、集塵機に滞留したものも含まれる。これらの微細副
製粉末は、従来廃棄処分に付されており、有効利用され
たものはなかった。このような微細副製粉末としては、
粒径が０．１〜６０μｍ、通常、０．３〜５０μｍの微
粉末粉体塗料組成物が含まれる。[0008] Examples of additives that can be optionally added include anti-sagging agents, surface conditioners, crosslinking accelerators, ultraviolet absorbers, light stabilizers, and antioxidants.
The fine secondary powder used in the present invention is a fine powder which is secondary produced when the raw material composition for a powder coating is ground to a predetermined particle size. Such fine by-product powders include not only those having a small crushed particle size but also those having been exhausted without being collected in the crushing step and retained in the dust collector. These fine by-product powders have been conventionally disposed of, and none have been used effectively. As such fine by-product powder,
A fine powder powder coating composition having a particle size of 0.1 to 60 μm, usually 0.3 to 50 μm is included.
【０００９】微細副製粉末は、単独で粉体塗料用原料組
成物として使用してもよく、粉体塗料用原料組成物の一
部として使用してもよい。得られる粉体塗料が均一の特
性を有するため、又は、良好な混練性を得るためには、
微細副製粉末を粉体塗料用原料組成物の一部として使用
する場合には、両者の樹脂種や、顔料組成、添加剤組成
等の組成が実質的に一致することが好ましい。また、両
者は、着色についても一致していることが好ましいが、
必須ではない。混色の問題があるが、得られたものの着
色に応じて、適宜用途を選定すればよい。但し、混色に
よる問題を少なくするためには、粉体塗料用原料組成物
が濃彩色の場合、微細副製粉末の色は、それに近似する
色であるほど好ましい。また、粉体塗料用原料組成物が
淡彩色の場合、粉体塗料用原料組成物の色調に変化を生
じないように、例えば、少量で使用すればよい。また、
微細副製粉末を単独で使用して粉体塗料を製造し、又は
粉体塗料用原料組成物の一部として使用して粉体塗料を
製造する過程で副製する３次や、４次等の微細副製粉末
を使用する場合には、熱履歴による弊害を防止するた
め、粉体塗料用原料組成物１００重量部に対して、好ま
しくは、２０重量部以下、更に好ましくは１５重量部以
下の量を混合することが好ましい。このような３次や４
次以降に副製する微細副製粉末は、その生成過程におい
て、反復して熱履歴を受けるため、微細副製粉末と粉体
塗料用原料組成物との相溶性が悪化したり、得られる塗
膜の平滑性が損なわれ易い。The fine by-product powder may be used alone as a raw material composition for a powder coating, or may be used as a part of the raw material composition for a powder coating. In order for the obtained powder coating to have uniform properties, or to obtain good kneading properties,
When the fine by-product powder is used as a part of the raw material composition for powder coating, it is preferable that the two types of resin, the composition of the pigment, the composition of the additive and the like substantially match. In addition, it is preferable that the two colors also match,
Not required. Although there is a problem of color mixing, the application may be appropriately selected according to the coloring of the obtained product. However, in order to reduce the problem of color mixture, when the raw material composition for powder coating is a deep color, the color of the fine secondary powder is preferably as close to that as possible. When the raw material composition for powder coating is light-colored, it may be used in a small amount, for example, so as not to change the color tone of the raw material composition for powder coating. Also,
Third- or fourth-order production of powder coatings by using fine by-product powder alone or in the process of manufacturing powder coatings by using as a part of a raw material composition for powder coatings When using a fine by-product powder, to prevent adverse effects due to heat history, based on 100 parts by weight of the raw material composition for powder coating, preferably 20 parts by weight or less, more preferably 15 parts by weight or less Is preferably mixed. Such third order and fourth
The fine by-product powder that is produced by the following process receives heat history repeatedly in the production process, so that the compatibility between the fine by-product powder and the raw material composition for powder coating deteriorates, The smoothness of the film is easily impaired.
【００１０】以上の微細副製粉末を１０００ｇ／ｍ3 以
下の濃度で４０℃以下の気流に乗せ、好ましくは、１８
０〜３５０℃、特に好ましくは、２５０〜３００℃の雰
囲気に制御したチャンバー内に、好ましくは０．３秒以
下、特に好ましくは０．１〜０．２秒の時間通過させ
る。通過後直ちに常温まで冷却を行い、融着物の固定化
を行う。The above fine secondary powder is put in an air stream at a concentration of 1000 g / m 3 or less at a temperature of 40 ° C. or less.
It passes through a chamber controlled to an atmosphere of 0 to 350 ° C., particularly preferably 250 to 300 ° C., for a time of preferably 0.3 seconds or less, particularly preferably 0.1 to 0.2 seconds. Immediately after the passage, the mixture is cooled to room temperature to fix the fused material.
【００１１】通過する粉体塗料の濃度が１０００ｇ／ｍ
3 を超えると、固定化しない粒子が大量に発生する傾向
がある。チャンバー内の温度が１８０℃未満の場合、固
定化し得ない粒子が大量に発生する傾向がある。逆に、
３５０℃を超えると樹脂分解が発生したり硬化反応が進
行し、成膜性に悪影響を及ぼす傾向がある。[0011] The concentration of the passing powder coating is 1000 g / m
If it exceeds 3 , a large amount of unfixed particles tends to be generated. When the temperature in the chamber is lower than 180 ° C., a large amount of particles that cannot be fixed tend to be generated. vice versa,
When the temperature exceeds 350 ° C., resin decomposition occurs or a curing reaction proceeds, which tends to have an adverse effect on film forming properties.
【００１２】また、通過時間が０．３秒を超えると、樹
脂分解や硬化反応により成膜性へ悪影響を及ぼす傾向が
ある。On the other hand, when the passage time exceeds 0.3 seconds, there is a tendency that the resin is decomposed or cured to adversely affect the film-forming properties.
【００１３】本発明の方法によって得られた粉体塗料
は、従来の粉体塗料の塗装の場合と同様に、静電スプレ
ーガン、流動浸漬、摩擦帯電ガン、インモールド等を使
用して被塗物、例えば、鋼板等の被塗物に塗装し、熱風
炉、赤外炉、誘導加熱炉等で焼付けることにより、塗膜
を形成することができる。The powder coating obtained by the method of the present invention is coated with an electrostatic spray gun, a fluid immersion, a triboelectric charging gun, an in-mold, or the like, in the same manner as in the case of the conventional powder coating. A coating film can be formed by coating an object, for example, an object to be coated such as a steel plate, and baking it in a hot air furnace, an infrared furnace, an induction heating furnace, or the like.
【００１４】[0014]
【実施例】以下、本発明について、更に、製造例、実施
例及び比較例により、更に詳細に説明する。なお、製造
例、実施例及び比較例中の「部」及び「％」は、重量を
基準とする。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Production Examples, Examples and Comparative Examples. The “parts” and “%” in Production Examples, Examples and Comparative Examples are based on weight.
【００１５】（粉体塗料Ａ及び副生成物Ａ’の調製）水
酸基価４９ｍｇＫＯＨ／ｇの飽和ポリエステル樹脂（日
本ユピカ社製：ＧＶ１１０）６０部にＩＰＤＩ ε-カ
プロラクタムブロックのイソシアネート樹脂（クレアノ
バ社製：ＶｅｓｔａｇｏｎＢ−１５３０）１６部、表面
調整剤としてシリカ吸着アクリル酸オリゴマー（モンサ
ント社製：モダフローパウダー２０００）を１部、脱泡
剤としてベンゾイン０．２部、白色顔料として二酸化チ
タン（石原化学社製：ＣＲ−９５）２４部を混合し、エ
クストルーダーで混練し、粉砕分級後、５０％平均体積
粒度３０μｍの粉体塗料Ａを得た。またその際発生した
５０％平均体積粒度１０μｍの粉体塗料副生成物Ａ’を
得た。(Preparation of Powder Coating A and By-product A ') An isocyanate resin having an IPDI ε-caprolactam block (manufactured by CLEANOVA) was added to 60 parts of a saturated polyester resin having a hydroxyl value of 49 mgKOH / g (manufactured by Nippon Yupika Ltd .: GV110). Vestagon B-1530), 16 parts of a silica-adsorbed acrylic acid oligomer (manufactured by Monsanto: Modaflow Powder 2000) as a surface conditioner, benzoin as a defoaming agent, 0.2 parts, titanium dioxide as a white pigment (Ishihara Chemical Co., Ltd.) : CR-95), and kneaded with an extruder. After pulverization and classification, powder coating material A having a 50% average volume particle size of 30 µm was obtained. Further, a powder coating by-product A ′ having a 50% average volume particle size of 10 μm generated at that time was obtained.
【００１６】（粉体塗料Ｂ及び副生成物Ｂ’の調製）水
酸基価４９ｍｇＫＯＨ／ｇの飽和ポリエステル樹脂（日
本ユピカ社製：ＧＶ１１０）８０部にＩＰＤＩ ε-カ
プロラクタムブロックのイソシアネート樹脂（クレアノ
バ社製：ＶｅｓｔａｇｏｎＢ−１５３０）２０部、表面
調整剤としてシリカ吸着アクリル酸オリゴマー（モンサ
ント社製：モダフローパウダー２０００）を１．５部、
脱泡剤としてベンゾイン０．３部、黒色顔料としてカー
ボンブラック（三菱化学社製：ＭＡ−１００）４部（白
色顔料／黒色顔料＝１００／１）を混合し、エクストル
ーダーで混練し、粉砕分級後、黒色の５０％平均体積粒
度３０μｍの粉体塗料Ｂを得た。またその際発生した５
０％平均体積粒度１０μｍの粉体塗料副生成物Ｂ’を得
た。(Preparation of Powder Coating B and By-product B ') An isocyanate resin having an IPDI ε-caprolactam block (manufactured by CLEANOVA) was added to 80 parts of a saturated polyester resin having a hydroxyl value of 49 mgKOH / g (manufactured by Nippon Yupika Ltd .: GV110). Vestagon B-1530) 20 parts, a silica-adsorbed acrylic acid oligomer (manufactured by Monsanto: Modaflow Powder 2000) as a surface conditioner, 1.5 parts,
0.3 parts of benzoin as a defoaming agent and 4 parts of carbon black (MA-100, manufactured by Mitsubishi Chemical Corporation) (white pigment / black pigment = 100/1) as a black pigment are mixed, kneaded with an extruder, and pulverized and classified. Thereafter, a black powder coating material B having a 50% average volume particle size of 30 μm was obtained. 5 which occurred at that time
A powder coating by-product B ′ having a 0% average volume particle size of 10 μm was obtained.
【００１７】（参考例１）作成した粉体塗料Ａ、Ｂを１
／１の比率で混合し、７００ｇ／ｍ3 の濃度で３０℃の
気流に乗せ、２２０℃の雰囲気に制御したチャンバー内
に、０．２秒間通過させ、通過後直ちに常温まで冷却
し、融着物の固定化処理を行い、得られた粒状物（粒
度：６０μｍ）を粉砕、分級を経て、５０％平均体積粒
度３０μｍの粉体塗料ＡＢを作成した。Reference Example 1 The prepared powder coatings A and B were
The mixture was put in an air stream of 30 ° C. at a concentration of 700 g / m 3 , passed through a chamber controlled to an atmosphere of 220 ° C. for 0.2 seconds, cooled immediately to room temperature after passing, and fused. , And the resulting granules (particle size: 60 μm) were pulverized and classified to prepare a powder coating AB having a 50% average volume particle size of 30 μm.
【００１８】（実施例１）作成した粉体塗料Ａ’、Ｂ’
を１／１の比率で混合し、参考例１と同様にして造粒固
定化処理を行い、粉砕、分級を経て、５０％平均体積粒
度３０μｍの粉体塗料Ａ’Ｂ’を作成した。(Example 1) Powder coatings A 'and B' prepared
Was mixed at a ratio of 1/1, and the mixture was subjected to granulation and immobilization treatment in the same manner as in Reference Example 1. After pulverization and classification, a powder coating A'B 'having a 50% average volume particle size of 30 µm was prepared.
【００１９】（比較例１）粉体塗料Ａ及びＢを、それぞ
れを１／１の比率で混合し、粉体塗料Ａ／Ｂを作成し
た。Comparative Example 1 Powder coatings A and B were mixed at a ratio of 1/1 to prepare powder coatings A / B.
【００２０】（比較例２）作成した粉体塗料Ａ’、Ｂ’
を１／１の比率で混合し、粉体塗料Ａ’／Ｂ’を作成し
た。(Comparative Example 2) Powder coatings A 'and B' prepared
Were mixed at a ratio of 1/1 to prepare powder coating materials A ′ / B ′.
【００２１】各々の塗料を冷間圧延鋼板に粉体塗装機
（ランズバーグゲマ社製 ＰＧ−１）を用いて、荷電圧
−８０ｋＶで塗装を行い。熱風乾燥炉を用いて２００℃
で１０分間加熱を行い、下記の評価を行った。Each paint was applied to a cold-rolled steel sheet by using a powder coating machine (PG-1 manufactured by Ransberg Gemma) at a load voltage of -80 kV. 200 ° C using hot air drying oven
For 10 minutes, and the following evaluation was performed.
【００２２】塗膜の状態：各色のドットが目視で判定で
きるかを２０ｃｍの距離から観察を行った。結果を表１
に示す。State of coating film: It was observed from a distance of 20 cm whether dots of each color could be visually judged. Table 1 shows the results
Shown in
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【発明の効果】本発明は、塗膜特性を劣化させることな
く、資源を有効利用できる経済的な粉体塗料の製造方法
を可能にした。According to the present invention, an economical method for producing a powder coating material capable of effectively utilizing resources without deteriorating the characteristics of a coating film has been made possible.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4F070 AA47 AC04 AC15 AC39 AC40 AC45 AC62 AE04 AE08 AE27 DA46 DB09 DC13 4J038 CD091 CG001 DB001 DB471 DG111 DG191 KA03 LA07 PA02 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F070 AA47 AC04 AC15 AC39 AC40 AC45 AC62 AE04 AE08 AE27 DA46 DB09 DC13 4J038 CD091 CG001 DB001 DB471 DG111 DG191 KA03 LA07 PA02
Claims (2)
程で副製する微細粉体状の副製粉末から粉体塗料を製造
する方法であって、前記微細副製粉末を高温雰囲気中を
通過させることにより、互いに接触、融着させて粉体造
粒を行い、次いで前記造粒粉体を分級、弱粉砕した後、
前記粉体塗料用原料組成物として使用することを特徴と
する粉体塗料の製造方法。1. A method for producing a powder coating from a fine powder secondary powder produced in a pulverizing step after kneading a raw material composition for a powder coating, comprising: By passing through, contact each other, fuse and perform powder granulation, then classify the granulated powder, after weak pulverization,
A method for producing a powder coating, which is used as the raw material composition for a powder coating.
が、微細副製粉末を１０００ｇ／ｍ3 以下の濃度で４０
℃以下の温度の気流に乗せて、１８０〜３５０℃の高温
雰囲気に制御したチャンバー内を０．３秒以下の時間通
過させることを特徴とする請求項１に記載の粉体塗料の
製造方法。Wherein the passage of a high-temperature atmosphere of the fine secondary grinding powder is a fine secondary milling late 1000 g / m 3 at a concentration 40
The method for producing a powder coating according to claim 1, wherein the powder coating material is passed through a chamber controlled to a high-temperature atmosphere of 180 to 350 ° C for a time of 0.3 seconds or less by being placed in an airflow having a temperature of not higher than 180 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000254308A JP2002069334A (en) | 2000-08-24 | 2000-08-24 | Method for producing powder coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000254308A JP2002069334A (en) | 2000-08-24 | 2000-08-24 | Method for producing powder coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002069334A true JP2002069334A (en) | 2002-03-08 |
Family
ID=18743278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000254308A Pending JP2002069334A (en) | 2000-08-24 | 2000-08-24 | Method for producing powder coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002069334A (en) |
-
2000
- 2000-08-24 JP JP2000254308A patent/JP2002069334A/en active Pending
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