JPH0638946B2 - How to apply urethane resin paint - Google Patents

How to apply urethane resin paint

Info

Publication number
JPH0638946B2
JPH0638946B2 JP63097826A JP9782688A JPH0638946B2 JP H0638946 B2 JPH0638946 B2 JP H0638946B2 JP 63097826 A JP63097826 A JP 63097826A JP 9782688 A JP9782688 A JP 9782688A JP H0638946 B2 JPH0638946 B2 JP H0638946B2
Authority
JP
Japan
Prior art keywords
coating
paint
amine
curing
curing catalyst
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
Application number
JP63097826A
Other languages
Japanese (ja)
Other versions
JPH01270980A (en
Inventor
亮 佐々木
孝 荒川
靖夫 住友
文孝 中山
正幸 河合
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Shinto Paint Co Ltd
Original Assignee
Nissan Motor Co Ltd
Shinto Paint Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd, Shinto Paint Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP63097826A priority Critical patent/JPH0638946B2/en
Publication of JPH01270980A publication Critical patent/JPH01270980A/en
Publication of JPH0638946B2 publication Critical patent/JPH0638946B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 (産業上の利用分野) 本発明はウレタン系樹脂塗料の塗装時に形成される塗膜
の乾燥硬化特性と塗着効率に優れた塗装方法に関するも
のである。
TECHNICAL FIELD The present invention relates to a coating method which is excellent in dry-curing characteristics and coating efficiency of a coating film formed at the time of coating a urethane-based resin coating material.

(従来の技術) 従来のウレタン系樹脂塗料の塗装方法としては例えば図
3に示すようなものがある。
(Prior Art) As a conventional coating method of urethane resin paint, there is, for example, the one shown in FIG.

すなわち同図において、塗料供給ホース3より送られた
ウレタン系樹脂塗料は塗装ブース6において空気供給ホ
ース2より送られた空気により塗装ガン1において、霧
化され、ついで霧化された塗料4は被塗物5の表面に付
着して被膜を形成する。このように表面に塗膜を有する
被塗物を焼付乾燥炉に入れ、60〜90℃で20〜60
分間乾燥を行うか、あるいは常温で数時間もしくは十数
時間以上放置することにより乾燥硬化させることにより
被塗物5の表面に硬化被膜8形成させる方法がある。し
かしながら加熱硬化方法にあっては焼付乾燥炉9が必要
であり、熱に弱い被塗物(例えばプラスチックなど)に
は使用できない欠点があった。
That is, in the figure, the urethane resin paint sent from the paint supply hose 3 is atomized in the coating gun 1 by the air sent from the air supply hose 2 in the coating booth 6, and then the atomized paint 4 is covered. It adheres to the surface of the coating material 5 to form a film. In this way, the article to be coated having the coating film on the surface is put into a baking and drying oven and the temperature is kept at 60 to 90 ° C for 20 to 60 ° C.
There is a method of forming a cured coating film 8 on the surface of the article to be coated 5 by drying for one minute or by allowing it to stand at room temperature for several hours or ten or more hours to dry and cure. However, the heat-curing method requires the baking / drying oven 9 and has a drawback that it cannot be used for an object to be heat-sensitive (for example, plastic).

一方常温硬化法では硬化に長時間を要する為生産性が悪
くまた乾燥中にホコリが付着して不良率が高くなるなど
の欠点があった。
On the other hand, the room temperature curing method has drawbacks such as poor productivity because curing takes a long time, and a high defective rate due to dust adhering during drying.

このようなウレタン系樹脂塗料の硬化促進方法としては
ウレタン系樹脂塗料を塗装したのちに直ちに気化したア
ミンの雰囲気中に未乾燥塗膜を曝し、該塗膜中にアミン
を浸透させてその触媒作用によって急速に硬化させる、
いわゆる蒸気アミン浸透法がある。(特公昭53−19
038及び特公昭50−2091)又、別の方法として
はウレタン系樹脂塗料を気化したアミンガスで霧化し、
このアミンガスと霧化塗料とを接触媒させることにより
触媒作用によって急速に硬化させる、いわゆる蒸気アミ
ン触媒噴霧方法がある。
As a method for accelerating the curing of such urethane resin coatings, immediately after the urethane resin coating is applied, the undried coating film is exposed to the atmosphere of vaporized amine, and the amine is permeated into the coating film to cause its catalytic action. Cures rapidly,
There is a so-called steam amine penetration method. (Japanese Patent Publication Sho 53-19
038 and Japanese Examined Patent Publication No. 50-2091) Alternatively, as another method, the urethane resin paint is atomized with vaporized amine gas,
There is a so-called vapor amine catalyst spraying method in which the amine gas and the atomized paint are brought into contact with each other to rapidly cure by catalytic action.

更には、硬化触媒をポリオール側に前もって入れて置き
ポリイソシアネート硬化剤を混合し、塗装することによ
り硬化を促進させる触媒前添加法がある。
Further, there is a pre-catalyst addition method in which a curing catalyst is placed in advance on the polyol side, a polyisocyanate curing agent is mixed, and coating is performed to accelerate curing.

(発明が解決しようとする課題) しかしながら気化したアミンを塗膜と接触させ蒸気アミ
ン浸透法はアミン雰囲気を保持するチャンバーが必要で
あり、なおかつ、アミンを外に漏らさないようにエアー
カーテンを設け、その排気を処理する装置が必要であ
る。
(Problems to be solved by the invention) However, the vapor amine permeation method in which vaporized amine is brought into contact with a coating film requires a chamber for maintaining an amine atmosphere, and further, an air curtain is provided so as not to leak the amine to the outside, A device is needed to treat the exhaust.

また気化したアミンを塗膜表面より浸透させるために、
浸透力に制限があり、厚膜塗膜には向うないなどの欠点
があった。
Also, in order to penetrate the vaporized amine from the surface of the coating film,
There was a drawback in that it had a limited penetration power and was not suitable for thick film coating.

さらにアミンを気化状態で使用するために使用可能なア
ミンの種類におのずと限界があった。
Furthermore, there is a natural limit to the kinds of amines that can be used because the amines are used in a vaporized state.

一方気化したアミンでウレタン系樹脂塗料を霧化する蒸
気アミン触媒噴霧方法においては塗膜の急速な乾燥硬化
が得られ、かつ厚膜塗装も可能になるなどの利点がある
がアミンを気化させるための装置が必要であり、使用可
能なアミンの種類にも制限があった。また硬化反応があ
まりにも急速であるために塗膜のレベリングが充分でな
く、上塗り塗装などの高度の塗膜状態を要求される塗装
においては不適当であり用途が制限されるなどの欠点が
あった。
On the other hand, in the vapor amine catalyst spraying method in which the urethane resin paint is atomized with the vaporized amine, there are advantages such as rapid drying and curing of the coating film, and thick film coating is also possible. Was required, and there were restrictions on the types of amines that could be used. In addition, since the curing reaction is too rapid, the leveling of the coating film is not sufficient, and it is not suitable for coating that requires a high degree of coating film state such as top coating, and there are drawbacks such as limited applications. It was

更に触媒を前もって添加しておく触媒前添加法では、硬
化は促進されるが可使時間が短くなり、塗料のロスが多
くなり取扱いが困難であるなどの欠点を有していた。
Further, the catalyst pre-addition method in which the catalyst is added in advance has drawbacks such as hardening being promoted, but the pot life is shortened, the paint loss is increased, and the handling is difficult.

したがって、本発明の目的は、厚膜塗装が可能でかつ適
当な乾燥硬化速度を有し、しかも高度の塗膜状態が得ら
れ、かつ塗着効率の優れた静電塗装に用いられる新規な
ウレタン系樹脂塗料の塗装時に形成される塗膜の乾燥硬
化特性の優れた塗装方法を提供することにある。
Therefore, an object of the present invention is to provide a novel urethane which is capable of thick film coating, has an appropriate dry curing rate, can obtain a high degree of coating state, and is used for electrostatic coating having excellent coating efficiency. It is an object of the present invention to provide a coating method in which a coating film formed at the time of coating a resin-based resin coating material has excellent dry curing characteristics.

(課題を解決するための手段) したがって、本発明はポリオールとポリイソシネートと
の反応を利用したウレタン系樹脂塗料を硬化促進させる
方法において、塗料霧化用空気中に沸点が150℃以下
の希釈溶剤にて1〜40wt%に希釈された液状硬化触媒
を霧状にして飛散させ、塗料の霧化とほぼ同時に塗料と
硬化触媒とを接触させながら塗装する時に液状硬化触媒
を必要に応じて前もって電気抵抗値の高い有機溶剤に溶
解することにより、静電塗装を行い、形成された塗膜を
乾燥硬化することを特徴とするウレタン系樹脂塗料の塗
装方法により、前記問題点を解決したものである。
(Means for Solving the Problems) Accordingly, the present invention is a method for promoting curing of a urethane resin coating material utilizing the reaction of a polyol and a polyisocyanate, in which a boiling point of 150 ° C. or less is added to a diluent solvent in the paint atomizing air. The liquid curing catalyst diluted to 1 to 40 wt% is atomized and scattered, and at the same time as the paint is atomized, the liquid curing catalyst is applied with electric resistance in advance in advance while contacting the coating with the curing catalyst. The above-mentioned problems are solved by a method for coating a urethane-based resin coating material, which comprises performing electrostatic coating by dissolving in a high-value organic solvent and drying and curing the formed coating film.

一般的にスプレー塗装では塗着効率が悪い場合が多く、
特に被塗物の形状が複雑になることにより塗着効率が悪
くなるものであり、これを解決する手段として静電塗装
が用いられる。
Generally, spray coating often has poor coating efficiency,
Particularly, since the shape of the article to be coated becomes complicated, the coating efficiency is deteriorated, and electrostatic coating is used as a means for solving this.

静電塗装を用いる時、当該液状硬化触媒が導電性の場
合、静電気がリークし、静電塗装が行えない為、当該液
状硬化触媒を前もって非導電性にしておく必要があり、
この場合非極性溶媒を使用することが適切である。
When using electrostatic coating, if the liquid curing catalyst is conductive, static electricity leaks and electrostatic coating cannot be performed, so it is necessary to make the liquid curing catalyst non-conductive in advance,
In this case it is appropriate to use non-polar solvents.

(作用) 以下本発明を図面を参照しながら説明する。第1図に示
すように硬化触媒タンクによあり供給された非極性溶媒
に希釈された液状硬化触媒は塗装ブース6において、流
量計11および調整バルブで適量に制御され、硬化触媒
供給ホース14によりミキサー10に送られる。ミキサ
ー10においては塗料霧化エアー供給ホース2より供給
された例えば0.5kg/cm2以上、好ましくは1.0〜
6.0kg/cm2の液状硬化触媒(非極性溶媒で希釈され
た)霧化圧に設定された空気中に液状硬化触媒を霧状に
分散させたのち塗装ガン1に供給される。一方塗料供給
ホース3により供給されたウレタン系樹脂塗料は塗装ガ
ン1において例えば2.0kg/cm2以上好ましくは3.
5〜6.0kg/cm2の塗料霧化圧に設定された霧状硬化
触媒含有空気により霧化されて霧状硬化触媒と共に塗装
ガン1より霧状で吐出される。一方高圧発生装置19に
て得られた静電気は塗装ガン1の先端に設けられた電極
20より直流高電圧が霧化塗料粒子に付与される。
(Operation) The present invention will be described below with reference to the drawings. As shown in FIG. 1, the liquid curing catalyst diluted by the non-polar solvent supplied by the curing catalyst tank is controlled to an appropriate amount by the flow meter 11 and the adjusting valve in the coating booth 6, and the curing catalyst supply hose 14 is used. It is sent to the mixer 10. In the mixer 10, for example, 0.5 kg / cm 2 or more supplied from the paint atomizing air supply hose 2, preferably 1.0 to
A liquid curing catalyst (diluted with a non-polar solvent) of 6.0 kg / cm 2 is atomized and dispersed in air set to an atomization pressure, and then supplied to a coating gun 1. On the other hand, the urethane resin paint supplied by the paint supply hose 3 is, for example, 2.0 kg / cm 2 or more, preferably 3.
It is atomized by the air containing the atomization curing catalyst set to a paint atomization pressure of 5 to 6.0 kg / cm 2 , and is atomized from the coating gun 1 together with the atomization curing catalyst. On the other hand, with respect to the static electricity obtained by the high voltage generator 19, a high DC voltage is applied to the atomized paint particles by the electrode 20 provided at the tip of the coating gun 1.

なお電極20は第2図で示される如く、ガン19内部に
設ける場合もあり、どちらでも良い。
The electrode 20 may be provided inside the gun 19 as shown in FIG.

例えば第4図に示すような構造を有する外部混合式の塗
装ガン1を用いた場合、空気供給口14から塗装ガン1
内に導入された非極性溶媒希釈液状硬化触媒含有空気を
上記のごとき所定の圧力に圧縮して空気キャップ15の
空気ノズル16から吹き出すことにより塗料ノズル17
の先端部に低圧部が生じる。塗料供給口18より塗装ガ
ン1内に供給された塗料ノズル17へと導かれた塗料は
上記の如く生じた低圧部の力によって吸引された塗料ノ
ズル17より吐出される。この時先端にある電極20に
よって直接高電圧を付与される吸引された塗料はさらに
続いて来る高圧空気の力(速度)によってちぎられ霧化
される。霧化された塗料14は被塗物5の表面に付着し
て塗膜を形成する。この様にして塗膜を形成した被塗物
5はポストキュア室に搬送され、例えば15〜80℃好
ましくは20〜50℃更に好ましくは室温付近に所定時
間放置される。これにより塗膜は硬化が行なわれる。
For example, when the external mixing type coating gun 1 having the structure shown in FIG. 4 is used, the coating gun 1 is supplied from the air supply port 14.
The non-polar solvent-diluted liquid curing catalyst-containing air introduced into the interior is compressed to a predetermined pressure as described above and blown out from the air nozzle 16 of the air cap 15 so that the paint nozzle 17
A low pressure part occurs at the tip of the. The paint, which is supplied from the paint supply port 18 to the paint nozzle 17 and is guided to the paint nozzle 17, is discharged from the paint nozzle 17 that is sucked by the force of the low pressure portion generated as described above. At this time, the attracted coating material, to which a high voltage is directly applied by the electrode 20 at the tip, is torn and atomized by the force (speed) of the high pressure air that follows. The atomized paint 14 adheres to the surface of the article 5 to be coated to form a coating film. The coated object 5 thus formed with a coating film is conveyed to a post-cure chamber and left at, for example, 15 to 80 ° C., preferably 20 to 50 ° C., and more preferably around room temperature for a predetermined time. Thereby, the coating film is cured.

本発明による塗装方法にいおて使用されるウレタン系樹
脂塗料としては従来の加熱または常温乾燥方法、蒸気ア
ミン浸透法、蒸気アミン触媒噴霧方法などに用いられ
る、いかなるウレタン系樹脂塗料でもよい。
The urethane-based resin coating used in the coating method according to the present invention may be any urethane-based resin coating used in the conventional heating or room temperature drying method, steam amine infiltration method, steam amine catalyst spraying method and the like.

例えばアクリルポリオール、アルキドポリオール、ポリ
エステルポリオール、ポリエーテルポリオールおよびそ
の変性品、あるいはこれらポリオール類の混合品よりな
るポリオール類と、トリレンジイソシアネート(TD
I)、キシリレンジイソシアネート(XDI)イソポン
ジイソシアネート(IPDI)、ジフェニルメタンジイ
ソシアネート(MDI)、及びこれらの水素添加物、ヘ
キサメチレンジイソシアネート、リジンジイソシアネー
ト、及びこれらの混合物などのポリイソシアネート類と
からなる二液型ポリウレタン樹脂塗料、ポリエチレング
リコール、ポリプロピレングリコール、などのポリアル
キレングリコール類のポリイソシアネート付加物で代表
される一液湿気硬化型ポリウレタン樹脂塗料がある。
For example, acrylic polyols, alkyd polyols, polyester polyols, polyether polyols and modified products thereof, or polyols composed of a mixture of these polyols, and tolylene diisocyanate (TD).
I), xylylene diisocyanate (XDI) isopone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), and a two-part polyisocyanate such as hydrogenated products thereof, hexamethylene diisocyanate, lysine diisocyanate, and mixtures thereof. There is a one-component moisture-curable polyurethane resin coating material represented by polyisocyanate adducts of polyalkylene glycols such as type polyurethane resin coating material, polyethylene glycol and polypropylene glycol.

これらのウレタン系樹脂塗料に対して一般に塗料に使用
される無機顔料、有機顔料、有機溶剤、消泡剤、レベリ
ング剤、色別れ防止剤、粘度調整剤などの塗料添加剤、
あるいはセルロースアセテート、塩化ビニル樹脂などの
ポリオール以外の変性用樹脂、可撓剤などが全て使用で
きる。
Paint additives such as inorganic pigments, organic pigments, organic solvents, defoamers, leveling agents, color separation inhibitors, and viscosity modifiers that are generally used for these urethane resin paints.
Alternatively, modification resins other than polyols such as cellulose acetate and vinyl chloride resins, and flexibilizers can all be used.

次に本発明において、使用できる触媒としては、従来の
蒸気アミン浸透方法および蒸気アミン触媒噴霧方法が常
温において気化できる第3級アミンを含む霧化可能な液
状アミン類はいずれも使用できる。このような液状アミ
ン類としては第3アミン類が好ましく、例えば、トリメ
チルアミン、トリエチルアミン、トリイソプロピルアミ
ン、トリ−n−プロピルアミン、トリ−n−ブチルアミ
ン、トリイソブチルアミン、トリ−sec−ブチルアミン
などの第3級アルキルアミン、ジメチルアニリン、ジエ
チルアニリン、トリベンジルアミンなどの芳香族アミ
ン、N−メチルモルホリン、N−エチルモルホリンなど
のモルホリン類、トリエタノールアミン、メチルジエタ
ノールアミン、ジメチルエタノールアミン、ジエチルエ
タノールアミン、ジエチルエタノールアミン、ジブチル
エタノールアミン、ジ(2−エチルヘキシル)エタノー
ルアミン、エチルジエタノールアミン、トリイソプロパ
ノールアミン、ジブチルイソプロパノールアミンなどの
アルカノールアミン、テトラメチルエチレンジアミン、
テトラメチルヘナキサメチレンジアミン、テトラメチル
プロピレンジアミン、ペンタメチルジエチレントリアミ
ンなどのジアミン類およびトリアミン類が使用できる。
Next, in the present invention, as a catalyst that can be used, any atomizable liquid amine containing a tertiary amine that can be vaporized at room temperature by the conventional vapor amine infiltration method and vapor amine catalyst spraying method can be used. As such liquid amines, tertiary amines are preferable, and examples thereof include trimethylamine, triethylamine, triisopropylamine, tri-n-propylamine, tri-n-butylamine, triisobutylamine, tri-sec-butylamine, and the like. Aromatic amines such as tertiary alkylamines, dimethylaniline, diethylaniline and tribenzylamine, morpholines such as N-methylmorpholine and N-ethylmorpholine, triethanolamine, methyldiethanolamine, dimethylethanolamine, diethylethanolamine, diethyl Ethanolamine, dibutylethanolamine, di (2-ethylhexyl) ethanolamine, ethyldiethanolamine, triisopropanolamine, dibutylisopropanolamine, etc. Kanoruamin, tetramethylethylenediamine,
Diamines and triamines such as tetramethylhenaxamethylenediamine, tetramethylpropylenediamine, pentamethyldiethylenetriamine and the like can be used.

一方本発明において使用される液状硬化触媒希釈用の有
機溶剤の種類は非極性有機溶剤であれば良いが、霧化時
飛散し塗膜に残らないほうが乾燥性の点より望ましく沸
点が150℃以下が好ましく、キシロール、ヘキサン、
ベンゾールなどが望ましい。一方希釈濃度については使
用される触媒アミンの種類によって異なるが概ね1〜4
0%アミン量/対希釈溶剤が適切であり好ましくは5〜
20%である。アミン濃度が1%より少ない場合は使用
希釈溶剤量が大となり経済的ロスが大であり、又40%
より多い場合は電導度が高くなり、静電性効果がなくな
ることがある。さらに本発明の塗装方法においては上記
のごときウレタン系樹脂塗料と液状硬化触媒との塗布時
における混合比は液状硬化触媒100%有効換算にて重
量比で100:0.1〜100:50好ましくは10
0:0.5〜100:30である。100:0.1より
触媒量が少ない場合は硬化触媒による硬化促進が不充分
であり、一方100:50より触媒量が多い場合は、塗
料のフロー性が悪くなりユズ肌仕上りとなる。
On the other hand, the type of the organic solvent for diluting the liquid curing catalyst used in the present invention may be a non-polar organic solvent, but it is desirable that it is scattered at the time of atomization and does not remain in the coating film from the viewpoint of drying property, and the boiling point is 150 ° C or less Is preferred, xylol, hexane,
Benzol is preferable. On the other hand, the dilution concentration varies depending on the type of catalytic amine used, but is generally 1 to 4
An amount of 0% amine / diluting solvent is suitable, preferably 5 to
20%. When the amine concentration is less than 1%, the amount of diluting solvent used is large and the economic loss is large.
If it is more, the conductivity will be higher and the electrostatic effect may disappear. Further, in the coating method of the present invention, the mixing ratio of the urethane resin coating composition and the liquid curing catalyst as described above at the time of application is 100: 0.1 to 100: 50, preferably 100: 0.1 to 100: 50 by weight in terms of 100% effective conversion of the liquid curing catalyst. 10
It is 0: 0.5 to 100: 30. When the amount of the catalyst is less than 100: 0.1, the curing acceleration by the curing catalyst is insufficient. On the other hand, when the amount of the catalyst is more than 100: 50, the flowability of the coating material is deteriorated, resulting in a rough finish.

又、塗布時におけるウレタン系樹脂塗料と空気との配合
比は体積比で1:100〜1:600、好ましくは1:
225〜1:375とされる。1:100より空気量が
少ないと、ウレタン系樹脂塗料の微粒化が不良となり、
肌不良となりやすく、1:600より空気量が多いと霧
化された塗料粒子のはね返りが多く発生し、塗着率が下
がることがある。
Further, the compounding ratio of the urethane resin coating material and air at the time of application is 1: 100 to 1: 600 by volume, preferably 1 :.
225 to 1: 375. If the amount of air is less than 1: 100, atomization of the urethane-based resin paint will be poor,
If the amount of air is larger than 1: 600, the sprayed particles of the atomized paint particles often repel and the coating rate may decrease.

一方、静電塗装として用いられる印加電圧は通常用いら
れる範囲であるが具体的には直流電圧として−40Kv〜
140Kvが好ましい。
On the other hand, the applied voltage used for electrostatic coating is within the range normally used, but specifically, the DC voltage is -40 Kv-
140 Kv is preferred.

(実施例) 以下、本発明を実施例によりさらに具体的に説明する。(Examples) Hereinafter, the present invention will be described more specifically with reference to Examples.

実施例1 2液型ポリウレタン樹脂塗料ベポン#10TH白(神東
塗料製)を塗装粘度は15秒/25℃に調整した後塗料
供給口へ送り、一方硬化触媒としてジメチルエタノール
アミンを10%濃度(wt)になる様にトリオールで希釈
した液状希釈済アミンを用いて、当該アミンを分散させ
た空気を霧化用空気として空気供給口より供給し塗装ガ
ンとしてモデル85(ビンクスジャパン製)を用いて塗
料をアミン混入空気にて霧化し静電塗装を行った。塗料
霧化圧4.0kg/cm2、塗料吐出量350cc/min、アミ
ン送り量(100%ジメチルエタノールアミン量とし
て)2%重量部対吐出塗料量、印加電圧−60kvであっ
た。
Example 1 Two-component polyurethane resin paint Bepon # 10TH white (manufactured by Shinto Paint Co., Ltd.) was adjusted to a coating viscosity of 15 seconds / 25 ° C. and then sent to the paint supply port, while dimethylethanolamine as a curing catalyst was added at a concentration of 10% ( wt) and liquid amine diluted with triol so that the air in which the amine is dispersed is supplied from the air supply port as atomizing air, and a model 85 (made by Binks Japan) is used as a coating gun. The paint was atomized with air mixed with amine and electrostatically coated. The paint atomization pressure was 4.0 kg / cm 2 , the paint discharge amount was 350 cc / min, the amine feed amount (as 100% dimethylethanolamine amount) was 2% by weight, and the discharge paint amount was -60 kv.

被塗物として200×300m/mのミガキ鋼板(常法
にて脱脂済み)と200m/m×300m/m長さ×
板厚0.8m/mのミガキ鋼板パイプ(常法にて脱脂済
み)を用いた。
200 x 300 m / m polished steel plate (degreased by conventional method) and 200 m / m x 300 m / m length x
A polished steel plate having a plate thickness of 0.8 m / m (degreased by a conventional method) was used.

膜厚25μの塗膜を得、ポストキュア30℃×10分に
て良好な硬化膜となりパイプでは表面20μ、裏面12
μの良好な塗膜を得た。
A coating film with a film thickness of 25μ was obtained, and a good cured film was obtained by post-cure 30 ° C x 10 minutes.
A good coating film of μ was obtained.

実施例2〜5 使用する希釈アミン濃度および送りアミン量(対塗料吐
出量)が表−1に示す以外は実施例1と同様な手法で塗
膜を形成した。いずれも硬化性つきまわり性共に良好で
あった。
Examples 2 to 5 Coating films were formed in the same manner as in Example 1 except that the concentration of diluted amine and the amount of fed amine (relative to the amount of paint discharged) shown in Table 1 were used. All of them had good curability and throwing power.

比較例1 直流電圧を印加しない以外は実施例1と同様な手法で塗
膜を形成した。硬化性は良好であったが、つきまわり性
は表面25μ裏面0μと不良であった。
Comparative Example 1 A coating film was formed in the same manner as in Example 1 except that no DC voltage was applied. The curability was good, but the throwing power was poor with the front surface 25 μ and the back surface 0 μ.

比較例2〜4 使用する希釈アミン濃度及び送りアミン量(対塗料吐出
量)が表−1に示す以外は実施例1と同様な手法で塗膜
を形成した。いずれも硬化性か、つきまわり性のいずれ
かか、あるいは両方共不良の塗膜であった。
Comparative Examples 2 to 4 A coating film was formed in the same manner as in Example 1 except that the concentration of diluted amine and the amount of fed amine (relative to the amount of paint discharged) shown in Table 1 were used. Either of them was a curable film, a throwing power, or both were defective.

(発明の効果) 以上述べたように本発明の方法に従うと室温で速硬化を
行い又厚膜塗装できると共に、つきまわり性が優れてい
るのでアミンチャンバーあるいはアミン気化装置が不要
であるうえに種々の硬化触媒が使用でき、塗着効率が高
くなる為にコストも安く、かつ生産性が良い塗装を行い
得るものである。
(Effects of the Invention) As described above, according to the method of the present invention, fast curing can be performed at room temperature and thick film coating can be performed, and since the throwing power is excellent, an amine chamber or an amine vaporizer is not necessary and various The curing catalyst can be used, and the coating efficiency can be increased, so that the cost can be reduced and the coating can be performed with good productivity.

【図面の簡単な説明】[Brief description of drawings]

第1図は、第2図は本発明に係わる塗装工程を示す模式
図、第3図は従来法による塗装工程を示す模式図、第4
図は本発明において用いられ得る塗装がこの一例の構造
を示す断面図である。 1…塗装ガン、2…塗料霧化エアー供給ホース、3…塗
料供給ホース、4…霧化塗料、5…被塗物、6…塗装ブ
ース、8…硬化塗膜、10…ミキサー、11…流量計、
12…希釈済硬化触媒タンク、13…ポストキュア室、
14…希釈硬化触媒供給ホース、19…高圧発生装置、
20…電極。
FIG. 1 is a schematic diagram showing a coating process according to the present invention, FIG. 3 is a schematic diagram showing a coating process by a conventional method, and FIG.
The drawing is a cross-sectional view showing the structure of this example of the coating that can be used in the present invention. DESCRIPTION OF SYMBOLS 1 ... Painting gun, 2 ... Paint atomization air supply hose, 3 ... Paint supply hose, 4 ... Atomization paint, 5 ... Coating object, 6 ... Painting booth, 8 ... Cured coating film, 10 ... Mixer, 11 ... Flow rate Total,
12 ... Diluted curing catalyst tank, 13 ... Post cure chamber,
14 ... Dilution curing catalyst supply hose, 19 ... High pressure generator,
20 ... Electrode.

フロントページの続き (72)発明者 中山 文孝 兵庫県宝塚市逆瀬台2丁目7―30―1004 (72)発明者 河合 正幸 兵庫県川西市久代4丁目4番18号 (56)参考文献 特開 昭59−170153(JP,A) 特開 昭60−199070(JP,A)Front Page Continuation (72) Inventor Fumitaka Nakayama 2-7-30-1004 Sakasedai, Takarazuka-shi, Hyogo Prefecture (72) Masayuki Kawai 4-4-1-18 Kushiro, Kawanishi-shi, Hyogo (56) References JP-A-59 -170153 (JP, A) JP-A-60-199070 (JP, A)

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】ポリイソシアネートの反応を利用したウレ
タン系樹脂塗料を硬化触媒を用いて塗装後の乾燥硬化を
促進させる方法において、塗料霧化用空気中に沸点が1
50℃以下の非極性溶媒にて1〜40wt%に希釈された
液状硬化触媒を霧状にして飛散させ、塗料の霧化とほぼ
同時に塗料と硬化触媒とを接触させながら塗装する時、
静電塗装法を用いて当該方法で塗装し、形成された塗膜
を乾燥硬化することを特徴とするウレタン系樹脂塗料の
塗装方法。
1. A method of accelerating dry curing after coating of a urethane resin coating material utilizing a reaction of polyisocyanate by using a curing catalyst, wherein a boiling point in the paint atomizing air is 1
When a liquid curing catalyst diluted to 1 to 40 wt% with a non-polar solvent at 50 ° C. or less is atomized and scattered, and at the same time when the paint is atomized and the coating and the curing catalyst are contacted,
A method for coating a urethane-based resin coating material, which comprises applying an electrostatic coating method in accordance with the method and then drying and curing the formed coating film.
JP63097826A 1988-04-20 1988-04-20 How to apply urethane resin paint Expired - Lifetime JPH0638946B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63097826A JPH0638946B2 (en) 1988-04-20 1988-04-20 How to apply urethane resin paint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63097826A JPH0638946B2 (en) 1988-04-20 1988-04-20 How to apply urethane resin paint

Publications (2)

Publication Number Publication Date
JPH01270980A JPH01270980A (en) 1989-10-30
JPH0638946B2 true JPH0638946B2 (en) 1994-05-25

Family

ID=14202531

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63097826A Expired - Lifetime JPH0638946B2 (en) 1988-04-20 1988-04-20 How to apply urethane resin paint

Country Status (1)

Country Link
JP (1) JPH0638946B2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136441B (en) * 1983-03-10 1986-06-18 Ashland Oil Inc Vaporous amine catalyst spray method
JPS60199070A (en) * 1984-03-23 1985-10-08 Asahi Chem Ind Co Ltd Method of formation of film

Also Published As

Publication number Publication date
JPH01270980A (en) 1989-10-30

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