JPS5870867A - Undercoating method for fluororesin coating - Google Patents
Undercoating method for fluororesin coatingInfo
- Publication number
- JPS5870867A JPS5870867A JP17054481A JP17054481A JPS5870867A JP S5870867 A JPS5870867 A JP S5870867A JP 17054481 A JP17054481 A JP 17054481A JP 17054481 A JP17054481 A JP 17054481A JP S5870867 A JPS5870867 A JP S5870867A
- Authority
- JP
- Japan
- Prior art keywords
- frit
- fluororesin
- glass
- coating
- composition
- 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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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はフッ素樹脂被覆のための下地処理方法、詳しく
は金属質基材の腐食等のおそれを回避して、該基材表面
に良好な接着性をもってフッ素樹脂を被覆塗装するため
の新しい改良された下地処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for preparing a surface for coating with a fluororesin, and more specifically, a method for coating a fluororesin on the surface of a metal base material with good adhesion while avoiding the risk of corrosion of the base material. Concerning a new and improved method of preparing a surface for painting.
鉄、アルミニウム、ステンレス等の金属基材表面にフッ
素樹脂被覆を行なうに際し、予め金属基材表面を琺瑯処
理したのち、フッ素樹脂被覆を行なうことによって、塗
膜の密着性や耐蝕性等総合的な寿命を改善できることは
知られている(特公昭47−17635号、特公昭47
−”17635号、特公昭55−46 、J号)。この
ような琺瑯処理した表面にフッ素樹脂被覆を施す場合、
通常フッ素樹脂用づライマーを施工後フッ素樹脂上塗り
用塗料を施す所謂プライマー法が用いられている。しか
しながら、前記づライマーは、元来金属基材ヘフッ素樹
脂を被覆するための接着補強剤として開発されたもので
あるため、琺瑯等の無機質基材との接着性は必ずしも良
好でなく、得られるフッ素樹脂被膜は、熱水中への浸漬
や水蒸気に暴露される場合に剥離しやすいという問題点
がある。When applying fluororesin coating to the surface of metal substrates such as iron, aluminum, and stainless steel, the surface of the metal substrate is enameled in advance, and then the fluororesin coating is applied to improve overall adhesion and corrosion resistance of the coating film. It is known that lifespan can be improved (Special Publication No. 47-17635, Special Publication No. 17635,
-"17635, Special Publication No. 55-46, J). When applying a fluororesin coating to such an enameled surface,
Usually, a so-called primer method is used in which a fluororesin primer is applied and then a fluororesin topcoat is applied. However, since the above-mentioned primer was originally developed as an adhesive reinforcing agent for coating metal substrates with fluororesin, its adhesion to inorganic substrates such as enamel is not necessarily good, and Fluororesin coatings have a problem in that they tend to peel off when immersed in hot water or exposed to water vapor.
本発明は、上記従来公知の下地処理法に見られる欠点及
び問題点をすべて解消した新しい下地処理方法を提供す
るものであり、その要旨は、ガラス、琺瑯釉及び陶磁器
釉からなる群から選ばれた少なくとも1種のフリットに
、該フリットの融点よりも低い温度で分解してガスを発
生する発泡剤を混合した混合物を、基材表面に塗付乾燥
後焼成して、上記発泡剤の分解により表面に凹凸の形成
された多孔質下地層を上記基材表面に形成させることを
特徴とするフッ素樹脂被覆のための下地処理方法にある
。The present invention provides a new surface treatment method that eliminates all the drawbacks and problems found in the conventionally known surface treatment methods, and its gist is to provide a new surface treatment method that eliminates all of the drawbacks and problems found in the conventionally known surface treatment methods. A mixture of at least one kind of frit and a blowing agent that decomposes at a temperature lower than the melting point of the frit to generate gas is applied to the surface of the substrate, dried, and then baked, whereby the blowing agent decomposes. A method for treating a base for coating with a fluororesin, comprising forming a porous base layer having an uneven surface on the surface of the base material.
本発明によれば、単にフッ素樹脂の分散体を含浸、焼成
するのみで、容易に顕著に優れた密着力をもって所望の
フッ素樹脂被覆を特徴とする特有の性能を具備する下地
処理層を形成させることができると共に、かくして得ら
れるフッ素樹脂被覆製品は、その耐水及び耐水蒸気性も
保証されている。According to the present invention, by simply impregnating and baking a fluororesin dispersion, it is possible to easily form a base treatment layer having a unique performance characterized by a desired fluororesin coating with significantly superior adhesion. In addition, the fluororesin-coated product thus obtained has guaranteed water resistance and water vapor resistance.
、本発明においては特定のフリット及び発泡剤の混合物
を用いることを必須とする。ここで該混合物を構成する
主成分とするフリットは、従来よりこの種下地処理に所
謂耐酸上ぐすシとして利用されることの知ら゛れている
通常のガラス、琺瑯釉及び陶磁器釉から適宜選択される
。好ましいフリット(!: シテu 例工ばSiO2−
At203 又h s”2− ”203− B2O3を
主成分とし、これにM”−0(M”= Nα、K、Li
)、M”0 (M” = Ea、Ca、ZrL%Co
、 Ni )、M”02Ct”=ri、Kn ) e
t適宜配合Lり40ヲ使用できる。その具体例としては
、以下の組成のものを例示できる。, the present invention requires the use of a specific frit and blowing agent mixture. The frit, which is the main component of the mixture, is appropriately selected from ordinary glass, enamel glaze, and ceramic glaze, which have been known to be used as so-called acid-resistant top glazes in this type of surface treatment. Ru. Preferred frit (!: Shiteu For example, SiO2-
At203 also has h s”2- ”203- B2O3 as the main component, and M”-0 (M”= Nα, K, Li
), M”0 (M” = Ea, Ca, ZrL%Co
, Ni), M"02Ct"=ri, Kn) e
You can use 40% of the mixture as appropriate. Specific examples thereof include those having the following compositions.
St O246〜55 66.9 60.0 5l−I
At2035〜10 3−0 2.0 2.6B
20312〜15 − 7.0 9.4Z *
20− 3 、□ −一7” t ()2
− 5.0 −BaO−2,0−
CaOO〜2 7.3 2−5 6.5ZnO
−1,111,8
0αF2 2〜7 − − −Coo
0=0−5 − 2.0 −M
nO20〜O−751,5−
Ni0 0〜0.75 − −
−また上記フリットに混合される発泡剤は、該フ
リットの融点よりも低い温度で分解してガスを発生する
物質よシ選択される必要がある。これは各種の無機化合
物例えば各種金属の硫酸塩、炭酸塩、硝酸塩、塩素化物
、水素化物等及び有機化合物例えばフェノール樹脂、シ
リコシ樹脂、アクリル樹脂、ポリスチレシ、ボリア三ド
、ポリエステル等より適宜選択される。無機化合物の代
表例と分解温度を示せば次の過多である。St O246~55 66.9 60.0 5l-I
At2035~10 3-0 2.0 2.6B
20312~15-7.0 9.4Z *
20-3, □-17”t ()2
- 5.0 -BaO-2,0- CaOO~2 7.3 2-5 6.5ZnO
-1,111,8 0αF2 2~7 - - -Coo
0=0-5-2.0-M
nO20~O-751,5- Ni0 0~0.75 - -
- Furthermore, the blowing agent mixed in the frit must be selected from a substance that decomposes to generate gas at a temperature lower than the melting point of the frit. This is appropriately selected from various inorganic compounds such as sulfates, carbonates, nitrates, chlorides, hydrides, etc. of various metals, and organic compounds such as phenol resins, silicone resins, acrylic resins, polystyrene, boriatrido, polyesters, etc. . The following are typical examples of inorganic compounds and their decomposition temperatures:
〈硫酸塩〉
分解開始温度(℃)
At2(SO4)3770
P a (SOa )3485
Cd 50. 700Z
ル504740
CO5O4700
Cu S□ a 65
0B龜、(SO,)3>400
MrLSO4850
〈炭酸塩〉
ZnCd 300、 3
CdCO357
CcLCO3825
Cd2 (:’03 600pbc
O,315
(’aMg (C03)2 730〜
760〈硫酸塩〉
AgN0. 444pbNo3>
470
L L NO3600
〈過塩素酸塩〉
KClO3400
AgCIo、 270Na(’Z
()3300
pd C12600
〈水素化物〉
BaH2675
KBH4>30O
NaBHu ) 400L
z BN2> 275
上記発泡剤のフリットに対する混合割合は、用いる各成
分の種類や引き続き得られる混合物の施工条件、基材の
種類等に応じて限定的ではないが、通常フリットに対し
て発泡剤を約2〜100重量%、好ましくは約5〜50
重量%の割合とするのが適当である。<Sulfate> Decomposition start temperature (℃) At2 (SO4) 3770 Pa (SOa) 3485 Cd 50. 700Z
Le 504740 CO5O4700 Cu S□ a 65
0B, (SO,)3>400 MrLSO4850 <Carbonate> ZnCd 300, 3 CdCO357 CcLCO3825 Cd2 (:'03 600pbc
O, 315 ('aMg (C03)2 730~
760〈Sulfate〉 AgN0. 444pbNo3>
470 L L NO3600 <Perchlorate> KClO3400 AgCIo, 270Na('Z
()3300 pd C12600 <Hydride> BaH2675 KBH4>30O NaBHu) 400L
z BN2> 275 The mixing ratio of the blowing agent to the frit is not limited depending on the type of each component used, the construction conditions of the subsequently obtained mixture, the type of base material, etc., but the mixing ratio of the blowing agent to the frit is usually about 2-100% by weight, preferably about 5-50%
It is appropriate to express the proportion in % by weight.
本発明においては、まず上記フリットと発泡剤との混合
物を基材表面に塗付し乾燥する。ここで基材としては例
えば琺瑯鋼板、アルミニウム琺瑯、ガラスライニンク鋼
板等を有利に用い得る。上記混合物の塗布は、通常の塗
装方法例えば吹付塗装法、流延法、浸漬法等に従い、上
記混合物を水等に希釈した液状形態で行なわれる。塗布
量は特に限定されないが、通常引き続く乾燥及び焼成後
の塗膜厚さが約5〜50μmとなる程度とするのが適当
である。引き続く乾燥は、常法に従い水等を蒸発させ得
る条件下に実施される。これは自然風乾によってもよい
が通常適当な乾燥器を用いて行なうのが好ましい。In the present invention, first, a mixture of the above-mentioned frit and a foaming agent is applied to the surface of a substrate and dried. Here, as the base material, for example, an enameled steel plate, an aluminum enameled steel plate, a glass-lined steel plate, etc. can be advantageously used. The above-mentioned mixture is applied in a liquid form by diluting the above-mentioned mixture with water or the like according to a conventional coating method such as a spray coating method, a casting method, or a dipping method. The amount of coating is not particularly limited, but it is usually appropriate to set the coating amount to an extent such that the thickness of the coating after subsequent drying and baking is about 5 to 50 μm. The subsequent drying is carried out according to a conventional method under conditions that allow water and the like to evaporate. This may be done by natural air drying, but it is usually preferable to use a suitable dryer.
本発明では次いで上記により塗布乾燥された混合物塗膜
を焼成して、該混合物中の発泡剤の分解により表面に凹
凸の形成された多孔質下地層を上記基材表面に形成させ
る。この焼成は一般に約520〜800℃の炉内で士数
分乃至数十分間で行なわれる。かくして本発明の下地処
理を完了する。In the present invention, the mixture coating film coated and dried as described above is then baked to form a porous base layer with irregularities on the surface due to the decomposition of the blowing agent in the mixture on the surface of the substrate. This firing is generally carried out in a furnace at about 520 to 800°C for several minutes to several tens of minutes. In this way, the base treatment of the present invention is completed.
また本発明では、上記により形成された多孔質下地層の
凹凸表面を更に例えばサンドづラスト等を用いて軽く研
削し、表層部を取り去り、内部に包含されている気泡の
隔壁を一部破壊して、より複雑な表面凹凸°を形成させ
ることもできる。かかる研削処理をも含む本発明方法に
よれば、よシ一層優れた密着力をもって、弗素樹脂被覆
が可能である利点がある。In addition, in the present invention, the uneven surface of the porous base layer formed as described above is further lightly ground using, for example, sand blasting to remove the surface layer and partially destroy the partition walls of the air bubbles contained inside. It is also possible to form more complex surface irregularities. According to the method of the present invention, which also includes such grinding treatment, there is an advantage that fluororesin coating can be performed with even better adhesion.
本発明方法によシ下地処理された基材へのフッ素樹脂塗
装は、公知の各種方法により行ない得る。The fluororesin coating on the base material treated by the method of the present invention can be carried out by various known methods.
その代表的な例を挙げれば、下塗り塗料と上塗シ塗料と
の二重塗装が行なわれる。上塗り塗料は通常顔料を除け
ばほぼフッ素樹脂のみの組成であり、下塗り塗料は基材
並びに上塗り塗膜の両者とも接着性の良い塗料が使用さ
れ、基材との接着性の良い成分である接着助剤と上塗り
のフッ素樹脂との接着性の良い成分即ちフッ素樹脂その
ものから成る塗料が使用される。A typical example is double coating with an undercoat and a topcoat. Topcoat paints are usually composed of almost only fluororesin except for pigments, and undercoat paints are made of paints that have good adhesion to both the base material and the topcoat film. A paint consisting of a component that has good adhesion between the auxiliary agent and the top coat fluororesin, that is, the fluororesin itself, is used.
本発明法によシ処理した基材に常法に従ってフッ素樹脂
を塗装したものは、後記実施例で示す通りその接着力は
極めて強く、また耐水及び耐水蒸気性も優れている。When a substrate treated by the method of the present invention is coated with a fluororesin according to a conventional method, its adhesive strength is extremely strong as shown in the examples below, and the water resistance and water vapor resistance are also excellent.
以下に実施例を示して本発明法により具体的に説明する
。The method of the present invention will be specifically explained below with reference to Examples.
実施例 1
下記組成の黒子ぐすシの上に、耐酸上ぐすりを、琺瑯加
工法に従い焼付加工して、琺瑯鋼板を準備する。Example 1 An enameled steel plate is prepared by baking an acid-resistant top glaze on a Kuroko gusushi having the following composition according to the enamel processing method.
組 成 黒子ぐすシ 耐酸上ぐすシ5
io2+ At20349.0 54.6B20
. +7.5 12.
OL z 2() + Nα20+に20 18
.1 13.8CaO+ZnO+Ba0
2.2 9.5Ca F2
5 、4 −Ha3A
tF6+Na2SiF62.5Coo +NiO+Mr
LO27,8−rio27.6
次いで、上記耐酸上ぐすシに下記第1表に示す各種発泡
剤の所定量を混合した混合物を水で練りミルを調製し、
これを上記琺瑯鋼板の表面に約40μ罵(焼成後の厚み
)の厚みに吹付塗装し、その後乾燥器を用いす水分を充
分に蒸発させる。Composition Kurokogusushi Acid-resistant Jogusushi 5
io2+ At20349.0 54.6B20
.. +7.5 12.
OL z 2() + 20 to Nα20+ 18
.. 1 13.8CaO+ZnO+Ba0
2.2 9.5Ca F2
5,4-Ha3A
tF6+Na2SiF62.5Coo+NiO+Mr
LO27,8-rio27.6 Next, prepare a mill by mixing a mixture of the acid-resistant top sieve with predetermined amounts of various blowing agents shown in Table 1 below with water,
This is spray-coated onto the surface of the above-mentioned enameled steel plate to a thickness of about 40 μm (thickness after firing), and then water is sufficiently evaporated using a dryer.
この塗装物を750℃に保持した電気炉中に入れ、約1
0分間焼成する。電気炉より取り出した琺瑯表面は、発
泡剤の分解により凹凸の非常に多いものであった。This coated product was placed in an electric furnace maintained at 750°C, and
Bake for 0 minutes. The surface of the enamel removed from the electric furnace was extremely uneven due to the decomposition of the blowing agent.
上記で下地処理後の処理済基材表面に、フッ素樹脂下塗
り塗料[ボリフ0ンzx−1809BxJ(タイ+シ工
業■製)を、焼成後の膜厚が8〜12μmになるように
塗布した。次いで赤外線乾燥器によシ加温し揮発性物質
を充分除去し更に380℃に保持された電気加熱炉中で
15分間焼成融着し、炉から取シ出し室温で放冷した。A fluororesin undercoating paint [BORIFUON ZX-1809BxJ (manufactured by Tai + Shi Kogyo ■) was applied to the surface of the treated base material after the above-mentioned surface treatment so that the film thickness after firing was 8 to 12 μm. Next, it was heated in an infrared dryer to sufficiently remove volatile substances, and then fired and fused in an electric heating furnace maintained at 380° C. for 15 minutes, and then taken out from the furnace and allowed to cool at room temperature.
かくして得られた下塗シ塗膜上にフッ素樹脂上塗り塗料
「ポリフロンエナメルES−5109BK」(タイ+シ
工業■製)を、焼成後の膜厚が25〜30μmになるよ
うに塗布した。次いで前述下塗りと同様にして乾燥、焼
成を行った。得られた塗膜について、90〜95℃の熱
水中に3時間浸漬した後の諸持性を測定した。この結果
を第1表に示した。尚第1表中の各物性の測定方法は夫
々次の通り。A fluororesin top coat "Polyflon Enamel ES-5109BK" (manufactured by Tai + Shi Kogyo ■) was applied onto the thus obtained undercoat film so that the film thickness after firing was 25 to 30 μm. Next, drying and baking were performed in the same manner as the undercoating described above. The durability of the obtained coating film after being immersed in hot water at 90 to 95° C. for 3 hours was measured. The results are shown in Table 1. The methods for measuring each physical property in Table 1 are as follows.
鉛筆硬度:JIS−に−6894
描画特性二 同 上
第 1 表
実施例 2
実施例1の試験番号本発明l及び2と同様にして下地処
理された凹凸表面を有する琺瑯鋼板を得る。Pencil hardness: JIS-6894 Drawing characteristics 2 Same as above Table 1 Example 2 Test number of Example 1 An enameled steel plate having an uneven surface which has been subjected to surface treatment is obtained in the same manner as in Inventions 1 and 2.
次いでこの処理表面をアルミナを研削材とじて用いてサ
ンドづラスト処理する。これによシ発泡した上ぐすシ層
(下地処理層)の表面が削られ、上ぐすり層中に内存す
る気泡の破壊によシ、一層凹凸の多い表面が形成される
。This treated surface is then sand blasted using alumina as an abrasive. As a result, the surface of the foamed top layer (base treatment layer) is scraped, and the bubbles existing in the top layer are destroyed, resulting in an even more uneven surface.
上記サンドづラスト処理後、この処理表面に、上ぬり用
フッ素樹脂塗料「ポリフロンエナメルES−5109B
K」を、焼成後の膜厚が25〜30μ簿になるように塗
布した。次いでこれを赤外線乾燥器により加温し揮発性
物質を除去し、更に380℃に保持された電気加熱炉中
で15分間焼成融着し、炉から取シ出し室温で放冷した
。After the above-mentioned sand blast treatment, the treated surface is coated with fluororesin paint “Polyflon Enamel ES-5109B”.
K" was applied so that the film thickness after firing was 25 to 30 μm. Next, this was heated with an infrared dryer to remove volatile substances, and further baked and fused in an electric heating furnace maintained at 380° C. for 15 minutes, taken out from the furnace, and allowed to cool at room temperature.
また比較のため、実施例!において準備した琺瑯鋼板(
本発明の混合物による下地処理を行なわない基材)につ
き、これを上記と同様にしてサンドづラスト処理して粗
面化後回様にフッ素樹脂被覆を行なう。Also, for comparison, an example! The enameled steel plate prepared in
A substrate (not subjected to surface treatment with the mixture of the present invention) is subjected to sand blast treatment in the same manner as described above to roughen the surface, and then coated with a fluororesin.
得られた塗膜について、実施例Iと同一の熱水浸漬試験
を行なった結果を下記第2表に示す。The obtained coating film was subjected to the same hot water immersion test as in Example I, and the results are shown in Table 2 below.
Claims (1)
た少なくとも1種のフリットに、該フリットの融点より
も低い温度で分解してガスを発生する発泡剤を混合した
混合物を、基材表面に塗付乾燥後焼成して、上記発泡剤
の分解により表面に凹凸の形成された多孔質下地層を上
記基材表面に形成させることを特徴とするフッ素樹脂被
覆の喪めの下地処理方法。 ■ 発泡剤がフリットに対し約2〜100重量%混合使
用される特許請求の範囲第1項に記載の方法。 ■ 下地層表面が更にサンドづ5スト処理される特許請
求の範囲第1項に記載の方法。[Claims] ■ A mixture of at least one kind of frit selected from the group consisting of glass, enamel shaft, and ceramic shaft, mixed with a blowing agent that decomposes at a temperature lower than the melting point of the frit to generate gas. is coated onto the surface of the substrate, dried, and then baked to form a porous base layer with irregularities on the surface due to the decomposition of the foaming agent, on the surface of the substrate. Ground treatment method. (2) The method according to claim 1, wherein the blowing agent is used in an amount of about 2 to 100% by weight based on the frit. (2) The method according to claim 1, wherein the surface of the base layer is further sand-struck treated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17054481A JPS5870867A (en) | 1981-10-23 | 1981-10-23 | Undercoating method for fluororesin coating |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17054481A JPS5870867A (en) | 1981-10-23 | 1981-10-23 | Undercoating method for fluororesin coating |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5870867A true JPS5870867A (en) | 1983-04-27 |
Family
ID=15906855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17054481A Pending JPS5870867A (en) | 1981-10-23 | 1981-10-23 | Undercoating method for fluororesin coating |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5870867A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63119881A (en) * | 1986-11-07 | 1988-05-24 | F C Design:Kk | Production of sheet material having enamel surface and fluoroplastic surface |
WO1997027149A1 (en) * | 1996-01-29 | 1997-07-31 | E.I. Du Pont De Nemours And Company | Method of coating organic polymer onto glass surface, and organic polymer-coated glass |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57137145A (en) * | 1980-12-29 | 1982-08-24 | Du Pont | Coating article |
-
1981
- 1981-10-23 JP JP17054481A patent/JPS5870867A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57137145A (en) * | 1980-12-29 | 1982-08-24 | Du Pont | Coating article |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63119881A (en) * | 1986-11-07 | 1988-05-24 | F C Design:Kk | Production of sheet material having enamel surface and fluoroplastic surface |
WO1997027149A1 (en) * | 1996-01-29 | 1997-07-31 | E.I. Du Pont De Nemours And Company | Method of coating organic polymer onto glass surface, and organic polymer-coated glass |
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