JPS6021547B2 - Polyolefin coated metal products - Google Patents

Polyolefin coated metal products

Info

Publication number
JPS6021547B2
JPS6021547B2 JP1904680A JP1904680A JPS6021547B2 JP S6021547 B2 JPS6021547 B2 JP S6021547B2 JP 1904680 A JP1904680 A JP 1904680A JP 1904680 A JP1904680 A JP 1904680A JP S6021547 B2 JPS6021547 B2 JP S6021547B2
Authority
JP
Japan
Prior art keywords
coating
polyolefin
epoxy resin
film
coated
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
Application number
JP1904680A
Other languages
Japanese (ja)
Other versions
JPS56117642A (en
Inventor
裕 石田
好弘 宮下
幸悦 遠藤
光夫 久世
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.)
Nippon Paint Co Ltd
Original Assignee
Nippon 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 Nippon Paint Co Ltd filed Critical Nippon Paint Co Ltd
Priority to JP1904680A priority Critical patent/JPS6021547B2/en
Publication of JPS56117642A publication Critical patent/JPS56117642A/en
Publication of JPS6021547B2 publication Critical patent/JPS6021547B2/en
Expired legal-status Critical Current

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Description

【発明の詳細な説明】 本発明はポリオレフィン被膜金属製品に関し、更に詳し
くは金属ポリオレフィン被覆との間の接着強度を高めか
つ金属の防蝕性を改良したポリオレフィン被覆金属製品
に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polyolefin-coated metal product, and more particularly to a polyolefin-coated metal product that has increased adhesive strength with a metal polyolefin coating and improved metal corrosion resistance.

鉄鋼、亜鉛、アルミニウムなどの金属製の管、板状体、
成型体などの表面にポIJエチレン、ポリプロピレンな
どのポリオレフィンを被覆して上記金属製品の防蝕性を
高めることは工業的に既に実施されている。
Metal pipes, plates, etc. made of steel, zinc, aluminum, etc.
It has already been industrially practiced to coat the surface of a molded body with a polyolefin such as polyethylene or polypropylene to improve the corrosion resistance of the metal products.

しかしながら、ポリオレフィンは一般に無極性の結晶性
樹脂で通常の薬品や溶剤などに溶解みなし、耐薬品性、
耐溶剤性の良好な極めて安定な樹脂であるや、ポリオレ
フィンを他の素材、例えば金属に接着させることは非常
に困難であった。従来、金属製品をポリオレフィンで被
覆するには、例えば金属表面をリン酸塩処理する方法、
金属表面に変性ポリオレフィソを主体とする接着剤を加
熱融着せしめる方法などが知られている。
However, polyolefins are generally non-polar crystalline resins that do not dissolve in ordinary chemicals or solvents, and have poor chemical resistance.
Since polyolefin is an extremely stable resin with good solvent resistance, it has been extremely difficult to bond polyolefin to other materials, such as metal. Conventionally, in order to coat metal products with polyolefin, methods such as phosphate treatment of the metal surface,
A known method is to heat-fuse an adhesive mainly made of modified polyolefin to a metal surface.

しかしながら、これらの方法では十分な密着力又は接着
強度と十分な耐員虫性をもったポリオレフィン被覆金属
製品が得られないという欠点があった。特に近年鋼管の
内外面などへポリオレフィンを被覆して成るポリオレフ
ィン被覆金属製品が多用されるようになり、品質面への
要求も厳しくなりすぐれた密着力と耐員虫・性を兼備し
たポリオレフィン被覆金属製品の開発が強く望まれてい
る。本発明者らは、かかる現状に鑑み、前記した従来の
ポリオレフィン被覆金属製品の欠点を排除し、すぐれた
密着力と耐蝕性を備えたポリオレフィン被覆金属製品を
開発することを目的として鋭意研究を進めた結果、本発
明をなすに至った。
However, these methods have the disadvantage that polyolefin-coated metal products with sufficient adhesion or adhesive strength and sufficient insect resistance cannot be obtained. Particularly in recent years, polyolefin-coated metal products made by coating the inner and outer surfaces of steel pipes with polyolefin have come into widespread use, and quality requirements have also become stricter. Polyolefin-coated metal products have excellent adhesion and insect resistance. Product development is strongly desired. In view of the current situation, the present inventors have conducted extensive research with the aim of eliminating the drawbacks of the conventional polyolefin-coated metal products described above and developing polyolefin-coated metal products with excellent adhesion and corrosion resistance. As a result, the present invention was completed.

本発明の要旨は、表面に、抗張力700蛇si以上、伸
び率2〜8%および熱変形温度40〜10yoの硬化膜
特性をもつヱポキシ樹脂を塗布し硬化せしめた第一の被
膜と、変性ポリオレフィン接着剤を加熱融着せしめた第
二の被膜と、ポリオレフィンを加熱勘着せしめた第三の
被膜とをこの順に配して成るポリオレフィン被覆金属製
品にある。本発明において金属製品の表面の第一の被膜
構成するのに使用されるェポキシ樹脂は、前述如く、抗
張力7000psi以上、好ましくは7500〜100
00psi、伸び率2〜8%、好ましくは3〜7%およ
び熱変形温度40〜10500、好ましくは60〜8℃
の硬化膜特性を有するェポキシ樹脂で硬化剤と共に常法
に従って金属製品の表面に塗布し硬化せしめる。第一の
被膜の膜厚には特に限定はないが、一般には10〜10
0ミクロン程度とする。上誌ェポキシ樹脂としては例え
ばビスフェノールA型又はその変性物(例えばウレタン
樹脂あるいはフェノール樹脂の骨格をェポキシ樹脂骨格
中に一部含有する)ウレタン変性ェポキシ樹脂あるいは
フェノール変性ェポキシ樹脂を用いることができ、ェポ
キシ当量が150〜2100の範囲のものが好ましい。
これはェポキシ当量15正未満は一官性樹脂成分が多く
なり、また2100を超えると反応性が低くなるのでい
ずれも実用上あまり好ましくないからである。一方、硬
化剤としては上記ェポキシ樹脂と反応してヱポキシ樹脂
を硬化せしめることのできる任意の硬化剤を使用するこ
とができる。そのような硬化剤としては例えば脂肪族ポ
リアミン、脂環族ポリアミン及びこれらの変性物やポリ
アミド樹脂などがあげられる。ェポキシ樹脂に対する硬
化剤の使用量比も前記硬化膜特性を満足する限りにおい
て従来の一般的な値と何等変ることはない。これらのェ
ポキシ樹脂及び硬化剤は一般的な塗布方法によって金属
表面に適用することができ、塗布作業を容易にするため
の溶剤を添加したり、また顔料を添加したりして行うこ
とができる。本発明においては、前述の如くェポキシ樹
脂の硬化膜の抗張力が700蛇si以上、伸び率が2〜
8%で、かつ熱変形温度が40〜105qoであること
が肝要であり、抗張力が700のsi未満の場合には金
属とポリオレフィン被覆との密着力が経時的に低下する
ので好ましくなく、伸び率が2%未満では低温での密着
力が低く、逆に8%を超えると高温での密着力が低くな
るので好ましくない。
The gist of the present invention is to provide a first coating coated with an epoxy resin having cured film characteristics of a tensile strength of 700 mm or more, an elongation rate of 2 to 8%, and a heat distortion temperature of 40 to 10 yo, and a modified polyolefin. A polyolefin-coated metal product is comprised of a second coating coated with an adhesive and a third coating coated with a polyolefin heat-fused in this order. As mentioned above, the epoxy resin used to form the first coating on the surface of the metal product in the present invention has a tensile strength of 7000 psi or more, preferably 7500 to 100 psi.
00psi, elongation rate 2-8%, preferably 3-7% and heat distortion temperature 40-10500, preferably 60-8℃
An epoxy resin having the properties of a cured film is applied together with a curing agent to the surface of a metal product according to a conventional method and cured. The thickness of the first coating is not particularly limited, but is generally 10 to 10
It should be about 0 micron. As the above-mentioned epoxy resin, for example, bisphenol A type or its modified product (for example, urethane-modified epoxy resin or phenol-modified epoxy resin containing a part of the skeleton of urethane resin or phenol resin in the epoxy resin skeleton) can be used. Preferably, the equivalent weight is in the range of 150 to 2,100.
This is because if the epoxy equivalent is less than 15, the monofunctional resin component will increase, and if it exceeds 2,100, the reactivity will be low, so both are not very preferred in practice. On the other hand, as the curing agent, any curing agent that can react with the epoxy resin and cure the epoxy resin can be used. Examples of such curing agents include aliphatic polyamines, alicyclic polyamines, modified products thereof, and polyamide resins. The ratio of the amount of curing agent to the epoxy resin to be used does not differ in any way from the conventional general value as long as the above-mentioned properties of the cured film are satisfied. These epoxy resins and curing agents can be applied to metal surfaces by common coating methods, and can be done by adding a solvent or a pigment to facilitate the coating process. In the present invention, as mentioned above, the tensile strength of the cured film of the epoxy resin is 700 SI or more, and the elongation rate is 2 to 2.
It is important that the tensile strength is 8% and the heat distortion temperature is 40 to 105 qo. If the tensile strength is less than 700 si, the adhesion between the metal and the polyolefin coating will decrease over time, which is undesirable, and the elongation rate will be lower. If it is less than 2%, the adhesion at low temperatures will be low, and if it exceeds 8%, the adhesion at high temperatures will be undesirable.

一方、ェポキシ樹脂硬化膜の熱変形温度が40℃未満で
は高温での密着力が不良となり、逆に105℃を超える
と常温での密着力が低下して好ましくない。本発明にお
いて金属製品の表面の第二の被膜を構成するのに使用さ
れる変性ポリオレフィン接着剤は、従来鋼管などの金属
製品の表面にポリオレフインを被覆するに当たり、金属
表面とポリオレフィン被覆との間に介在させて金属とポ
リオレフィンの密着性を高めるのに使用されていたもの
で常法に従って前記ェポキシ樹脂被膜上に加熱融着せし
める。このような変性ポリオレフィン接着剤としては、
例えば、エチレンとアクリル酸との共重合物、エチレン
と無水マレィン酸との共重合物エチレンと酢酸ビニルと
の共重合物などの変性ポリオレフインがあげられ、ベレ
ット形状、粉末状などの任意の形状のものを使用できる
。本発明において金属製品の表面の第三の被膜を構成す
るのに使用されるボリオレフィンには、従来金属製品の
被覆用に一般的に使用されていた、例えばポリエチレン
、ポリプロピレンなどの各種オレフィンの単一重合体を
主体とし、これに必要に応じて顔料添加剤、増量剤など
が包含され、シート状、ベレット状、粉末状などの任意
の形状のものを使用できる。
On the other hand, if the heat deformation temperature of the cured epoxy resin film is less than 40°C, the adhesion at high temperatures will be poor, and if it exceeds 105°C, the adhesion at room temperature will decrease, which is undesirable. In the present invention, the modified polyolefin adhesive used to form the second coating on the surface of a metal product is used between the metal surface and the polyolefin coating when coating the surface of a metal product such as a steel pipe with polyolefin. It has been used to enhance the adhesion between metal and polyolefin by interposing it therein, and it is heat-fused onto the epoxy resin film according to a conventional method. Such modified polyolefin adhesives include:
Examples include modified polyolefins such as copolymers of ethylene and acrylic acid, copolymers of ethylene and maleic anhydride, and copolymers of ethylene and vinyl acetate. can use things. The polyolefin used to form the third coating on the surface of metal products in the present invention includes various olefin monomers such as polyethylene and polypropylene, which have been commonly used for coating metal products in the past. It is mainly composed of a monopolymer, and contains pigment additives, fillers, etc. as necessary, and can be in any shape such as sheet, pellet, or powder.

本発明に金属製品は、鉄、アルミニウム、亜鉛、銅、ニ
ッケル、ステンレススチール、真ちゆつ、ブリキ、トタ
ンなどの金属製の管状体、板状体、構造体などである。
The metal products used in the present invention include tubular bodies, plate-shaped bodies, structures, etc. made of metals such as iron, aluminum, zinc, copper, nickel, stainless steel, brass, tinplate, and galvanized iron.

本発明に従って金属製品をポリオレフィンで被覆する方
法について説明すると、先ず金属表面の酸化被膜などを
サンドブラスト、ショットプラストなどの方法によって
除去した後、前記ェポキシ樹脂を金属表面に塗布する。
ェポキシ樹脂は、例えばエアースプレー、ェアレススプ
レ−、刷毛塗り、しごき塗り、静電塗装などの通常の塗
装方法で10〜100ム厚(乾燥時厚)に塗布し、自然
乾燥又は温度60〜250qoで5〜30分間程度加熱
して被膜を形成させる。このェポキシ樹脂被膜上に、例
えば粉末状の変性ポリ/オレフィンを主成分とした接着
剤を静電塗装方法によって付着させ約160〜220℃
の温度で5〜60分間程度加熱して融着させ、その上に
ポリオレフィンの被膜を加熱融着させる。
To explain the method of coating a metal product with polyolefin according to the present invention, first, the oxide film on the metal surface is removed by a method such as sandblasting or shot blasting, and then the epoxy resin is applied to the metal surface.
The epoxy resin is applied to a thickness of 10 to 100 µm (dry thickness) using a normal coating method such as air spray, airless spray, brush coating, ironing coating, or electrostatic coating, and then dried naturally or at a temperature of 60 to 250 qo. Heat for about 30 minutes to form a film. An adhesive mainly composed of, for example, powdered modified poly/olefin is applied onto this epoxy resin film by electrostatic coating at a temperature of approximately 160 to 220°C.
The polyolefin coating is heated and fused thereon for about 5 to 60 minutes at a temperature of .

ポリオレフィン被膜はポリオレフィンベレットを使用す
る場合には通常の押出被覆方法によって被覆でき(上記
変性ポリオレフィンもべレット状の場合には押出被覆方
法によることをができる)、フィルム又はシ−ト状の場
合には例えば約140〜200qoの温度及び約0.1
〜1.0k9/洲の圧力下に20〜180秒程度圧着加
熱すればよい。なお変性ポリオレフィン接着剤被膜及び
ポリオレフィン被膜の膜厚については従来のものと何等
変るところはなく、例えば、それぞれ、200〜500
仏及び2〜5脚程度とするこができる。このようにして
、広い温度環境条件下において、しかも経時的に悪化す
ることのない充分な接着強度又は密着力を有するポリオ
レフィン被覆金属製品を得ることができ、金属製品の防
蝕性の信頼性を一層高めることができた。
When polyolefin pellets are used, the polyolefin coating can be coated by a normal extrusion coating method (the above-mentioned modified polyolefin can also be coated by an extrusion coating method when it is in the form of a pellet), and when it is in the form of a film or sheet, For example, at a temperature of about 140 to 200 qo and about 0.1
It is sufficient to press and heat for about 20 to 180 seconds under a pressure of ~1.0 k9/s. The thicknesses of the modified polyolefin adhesive film and the polyolefin film are the same as those of conventional ones, for example, 200 to 500% respectively.
It can be made into a Buddha or about 2 to 5 legs. In this way, it is possible to obtain polyolefin-coated metal products that have sufficient adhesive strength or adhesion that does not deteriorate over time under a wide range of temperature and environmental conditions, further increasing the reliability of the corrosion resistance of metal products. I was able to increase it.

以下、本発明を実施例に基づいて更に具体的に説明する
Hereinafter, the present invention will be explained in more detail based on Examples.

なお、例中r部」および「%」は、それぞれ、「重量部
」および「重量%」を意味する。実施例1〜4および比
較例1〜6 第1表に示した組成のェポキシ樹脂と硬化剤との配合物
を、表面をサンドプラストした鉄板(寸法3.2×70
×15仇蚊)上に塗布し、第1表に示す乾燥条件で硬化
せしめた。
In the examples, "r part" and "%" mean "part by weight" and "% by weight," respectively. Examples 1 to 4 and Comparative Examples 1 to 6 Iron plates (dimensions 3.2 x 70
x 15 mosquitoes) and cured under the drying conditions shown in Table 1.

硬化膜の特性を第1表に示す。第 1表 〔第1表脚注〕 夫1 :ェポキシ当量450のピスフェノールA型ェポ
キシ樹脂75部にメチルィソブチグトン10部キンロ−
ル15部を加え7 5%溶液とした。
Table 1 shows the properties of the cured film. Table 1 [Footnotes to Table 1] Husband 1: 75 parts of pisphenol A type epoxy resin with an epoxy equivalent of 450 and 10 parts of methylisobutigtone.
15 parts of the solution was added to make a 75% solution.

失2 :ェボキシ当量1100のビスフヱノールA型ェ
ポキシ樹脂60部にメチルィソブチルケトン20部キン
ロール20部を加え40〜50℃K加溢して溶解し60
%溶液とした。失3 :ェポキン当量320のウレタン
変性ビスフェノ−ルA型の液状ェポキン樹脂夫4 :ェ
ボキソ当量2400のフェノ−ル変性(変性度20%)
(変性度15%)ピスフェノールA型ェボキ・久樹脂5
0%液(溶剤トルェン30部シクロヘキサノン10部メ
チルィソブチルケトン10部セルソルブアセテ・ト10
部)×5 :ェボキシ当量1000のビスフェノールA
型ェボキシ樹脂粉末とテトラヒドロフタル酸無水物粉末
(失12参照)を混合粉砕したものを、100〜110
℃にて加熱溶融せしめ、冷却後粉砕した。失6 :ェポ
キン当量190のビスフェノールA型液状樹脂失7 :
ェポキシ当量1900のビスフェノールA型ェポキシ樹
脂40部Kメチルィソプチルヶトン20部、キシロール
20部、セルソブアセテート20部を加え、40〜50
0CK加温して40%溶液とした。
Loss 2: 20 parts of methyl isobutyl ketone and 20 parts of Kinrole were added to 60 parts of bisphenol A type epoxy resin with an eboxy equivalent of 1100, and dissolved by overflowing at 40 to 50°C.
% solution. Loss 3: Urethane-modified bisphenol A-type liquid epoquine resin with an epoquine equivalent of 320.4: Phenol-modified resin with an epoquine equivalent of 2400 (degree of modification 20%).
(Modification degree 15%) Pisphenol A type Eboki Kuresin 5
0% solution (solvent 30 parts toluene 10 parts cyclohexanone 10 parts methyl isobutyl ketone 10 parts cell solve acetate)
part) x 5: Bisphenol A with eboxy equivalent of 1000
A mixture of eboxy resin powder and tetrahydrophthalic anhydride powder (see Loss 12) is mixed and pulverized to a powder of 100 to 110
The mixture was melted by heating at ℃, and after cooling, it was crushed. Loss 6: Bisphenol A liquid resin with epoquine equivalent of 190 Loss 7:
Add 40 parts of bisphenol A type epoxy resin with an epoxy equivalent of 1900, 20 parts of K-methylisobutyl, 20 parts of xylol, and 20 parts of celsobu acetate,
It was heated to 0CK to make a 40% solution.

失8 :アミ価140の脂肪族ァミン(無溶剤)失9
:アミン価130のボリァミド樹脂(70%溶液、トル
ォール25孫、ィソブタ5%)失10:ァミン価270
の脂環族ポリァミン(無溶剤)×11:アミン価250
のァミンアダクト樹脂(50孫溶液、メチルィソブチル
ケトン10部、エチルセルソルプ10部、キンレン20
部、ジアセトンアルコール10部)失12:テトラヒド
ロフタル酸無水物夫13:ァミン価300の芳香族ァミ
ン(無溶剤)×14:(膜厚測定法)電磁式敏厚計(ヶ
ット科学研究所製)にて測定した。
Loss 8: Aliphatic amine with amine value of 140 (solventless) Loss 9
: Boryamide resin with amine value 130 (70% solution, toluol 25%, isobuta 5%) loss 10: amine value 270
Alicyclic polyamine (solvent-free) x 11: Amine value 250
Amin adduct resin (50 Son's solution, 10 parts of methyl isobutyl ketone, 10 parts of ethyl cellol, 20 parts of Kinren)
part, diacetone alcohol 10 parts) Loss 12: Tetrahydrophthalic anhydride 13: Aromatic amine with an amine value of 300 (solvent-free) ).

失15:(抗張力測定法)ェポキン樹脂をブリキ板の上
に塗布し、各実施例及び比較例の条件下で硬化せしめた
後、水銀を用いてェポキシフィルムをブリキ板よりはが
しとる。
Loss 15: (Tensile Strength Measuring Method) Epoquine resin is applied onto a tin plate and cured under the conditions of each Example and Comparative Example, and then the epoxy film is peeled off from the tin plate using mercury.

このフィルムをJIS−K−6723K従って抗張力を
求めた。失16:(伸び率測定法) 上記抗張力測定時にフィルムの伸びをl可時に測定しフ
ィルム伸びた距離/フィルムのもとの長さ×100%K
て伸び率を求めた。
The tensile strength of this film was determined according to JIS-K-6723K. Loss 16: (Elongation rate measurement method) During the above tensile strength measurement, the elongation of the film was measured at the same time, and the distance the film was elongated/original length of the film x 100%K
The elongation rate was determined.

夫17:(熱変形温度測定法)上記抗張力測定と同様に
フリ−フィルムを作成し、島津製作所製TMA−30に
て熱変形温度を測定した。
Husband 17: (Method for measuring heat distortion temperature) A free film was prepared in the same manner as in the above tensile strength measurement, and the heat distortion temperature was measured using TMA-30 manufactured by Shimadzu Corporation.

上記の如くして得られたェポキシ樹脂の被膜上にシート
状の変性ポリエチレン(三井石油化学製、商品名アドマ
ー NE050)を17び0にて加熱融着して300〜
400ム陣の被膜を形成し、更にその上に予じめ加熱し
たポリエチレンフィルム(MI値1.ふ密度0.925
の低密度ポリエチレンフィルム厚3〜4胸)を温度17
0qo及び圧力0.1k9/地で2分間圧着せしめ、ポ
リエチレン−鉄板の積層体を得た。
On the epoxy resin film obtained as above, a sheet of modified polyethylene (manufactured by Mitsui Petrochemicals, trade name Admer NE050) was heat-fused at a temperature of 17 to 0.
A film of 400 μm was formed, and a preheated polyethylene film (MI value 1, density 0.925
low-density polyethylene film (thickness 3-4 cm) at temperature 17
Pressure bonding was carried out for 2 minutes at 0 qo and a pressure of 0.1 k9/ground to obtain a polyethylene-iron plate laminate.

なお、比較例6ではェポキシ樹脂被膜を施すことなく、
鉄板表面をサンドブラスト処理を行い170oCに子熱
した後、上記変性ポリエチレン及びポリエチレンフィル
ムを被覆した。このようにして得た積層体の接着強度お
よび耐蝕性を下記方法で試験した。
In addition, in Comparative Example 6, without applying an epoxy resin coating,
After sandblasting the surface of the iron plate and heating it to 170oC, the above-mentioned modified polyethylene and polyethylene film were coated. The adhesive strength and corrosion resistance of the thus obtained laminate were tested by the following method.

結果を第2表に示す。〔接着強度〕:積層体にIQ松中
で鉄面に達するまでのキズを入れた後、その一部を剥離
し、鉄面とポリエチレン被膜の18o剥離強度(接着強
度)をテンシロン型引張り試験器(東洋ボールドウィン
社製)にて十60こ0,十2びC及び−20qCにて測
定した。
The results are shown in Table 2. [Adhesive strength]: After scratching the laminate until it reaches the steel surface in IQ Matsunaka, part of it is peeled off and the 18o peel strength (adhesive strength) between the steel surface and the polyethylene coating is measured using a Tensilon type tensile tester ( (manufactured by Toyo Baldwin Co., Ltd.) at 160°C, 12°C, and -20qC.

また積層体接着強度の経時変化を試験するために、サン
シヤインウエザオメーターにて300時間促進耐候曝露
後、その後肴強度を上記方法にて十20qoで測定した
。〔耐蝕性〕:積層体に鉄面素地が露出するまで5肋中
の穴をあげ、これに常温で3%食塩水に浸薄し、積層体
に−1.5Vの電圧を印加し1ケ月放置後、鉄−積層被
覆間の界面の侵され具合ナィィフの刃で侵入距離で測定
した。
Further, in order to test the change in adhesive strength of the laminate over time, the laminate was exposed to accelerated weathering for 300 hours using a Sunshine Weather-Ometer, and then the plate strength was measured at 120 qo using the above method. [Corrosion resistance]: Holes in the 5 ribs were drilled in the laminate until the iron surface base was exposed, diluted with 3% saline solution at room temperature, and a voltage of -1.5V was applied to the laminate for 1 month. After standing, the degree of erosion of the interface between the iron and the laminated coating was measured by the penetration distance with a knife blade.

第2表の結果から〆らかなように、硬化膜の抗張力が7
00蛇si以上、伸び率が2〜8%および熱変形温度が
40〜105qoのェポキシ樹脂被膜を第一層として有
する積層体(実施例1〜4)は、ェポキシ樹脂被膜を有
しない積層体(比較例6)に比較して接着強度が高く、
また耐蝕性も著しくすぐれている。
From the results in Table 2, it is clear that the tensile strength of the cured film is 7.
The laminates (Examples 1 to 4) having an epoxy resin coating as the first layer with an elongation rate of 2 to 8% and a heat deformation temperature of 40 to 105 qo are different from the laminates having no epoxy resin coating ( Adhesive strength is higher than that of Comparative Example 6),
It also has excellent corrosion resistance.

また、硬化膜特性が上記特定の範囲を満足しないェポキ
シ樹脂被膜を有する積層体(比較例1〜5)に比較して
広い温度範囲にわたって接着強度が接し〈大きく、しか
も鰹時接着強度および耐蝕性も著しくすぐれている。第
2 表 上で得られた実施例1〜4及び比較例1〜5の積層体の
密着性をJIS−K−5400の方法に従ってゴバソ目
試験にて試験した。
In addition, compared to laminates with epoxy resin coatings whose cured film properties do not satisfy the above specific range (Comparative Examples 1 to 5), the adhesive strength is close to that over a wide temperature range, and the adhesive strength and corrosion resistance are also high. is also significantly superior. The adhesion of the laminates of Examples 1 to 4 and Comparative Examples 1 to 5 obtained in Table 2 was tested by a rubbish test according to the method of JIS-K-5400.

結果は第3表に示す通りである。第3表 *:「剥離せず残存したゴバン目の数/試験したゴバン
目の総数」で表示第3表の結果から明らかなように、硬
化膜の抗張力が700倣si以上、伸び率が2〜8℃お
よび熱変形温度が140〜105qoのェポキシ樹脂被
膜を第一層として有する積層体(実施例1〜4)は、硬
化膜特性が上記特定の範囲を満足しないヱポキシ樹脂被
膜を有する積層体(比較例1〜5)に比較して密着性に
著しく鰻れている。
The results are shown in Table 3. Table 3*: Displayed as "Number of stitches remaining without peeling/total number of stitches tested" As is clear from the results in Table 3, the tensile strength of the cured film is 700 si or more, and the elongation rate is 2. The laminates (Examples 1 to 4) having an epoxy resin coating as a first layer with a temperature of ~8°C and a heat distortion temperature of 140 to 105 qo are laminates having an epoxy resin coating whose cured film properties do not satisfy the above specific range. Compared to (Comparative Examples 1 to 5), the adhesion was significantly improved.

Claims (1)

【特許請求の範囲】 1 表面に、抗張力7000psi以上、伸び率2〜8
%および熱変形温度40〜105℃の硬化膜特性をもつ
エポキシ樹脂を塗布し硬化せしめた第一の被膜と、変性
ポリオレフイン接着剤を加熱融着せしめた第二の被膜と
、ポリオレフインを加熱融着せしめた第三の被膜とをこ
の順に配して成るポリオレフイン被膜金属製品。 2 前記金属製品が鋼管である特許請求の範囲第1項記
載の金属製品。
[Claims] 1. On the surface, the tensile strength is 7000 psi or more, and the elongation rate is 2 to 8.
% and a heat distortion temperature of 40 to 105°C, the first coating is coated and cured with an epoxy resin, the second coating is coated with a modified polyolefin adhesive, and the polyolefin is heat fused. A polyolefin-coated metal product comprising a third coating and a third coating in this order. 2. The metal product according to claim 1, wherein the metal product is a steel pipe.
JP1904680A 1980-02-20 1980-02-20 Polyolefin coated metal products Expired JPS6021547B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1904680A JPS6021547B2 (en) 1980-02-20 1980-02-20 Polyolefin coated metal products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1904680A JPS6021547B2 (en) 1980-02-20 1980-02-20 Polyolefin coated metal products

Publications (2)

Publication Number Publication Date
JPS56117642A JPS56117642A (en) 1981-09-16
JPS6021547B2 true JPS6021547B2 (en) 1985-05-28

Family

ID=11988469

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1904680A Expired JPS6021547B2 (en) 1980-02-20 1980-02-20 Polyolefin coated metal products

Country Status (1)

Country Link
JP (1) JPS6021547B2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58168628A (en) * 1982-03-30 1983-10-05 Mitsui Petrochem Ind Ltd Production of metallic material coated with polyethylene composition
JPS59150575A (en) * 1983-02-17 1984-08-28 Ube Ind Ltd Coating method for metal surface
JPS59224719A (en) * 1983-06-06 1984-12-17 Nippon Steel Corp Highly corrosion-resistant covered steel sheet pile
JPS6085938A (en) * 1984-09-12 1985-05-15 新日本製鐵株式会社 Corrosion-protective coated steel sheet pile
JPS6172127A (en) * 1984-09-17 1986-04-14 Nippon Steel Corp Corrosionproof covered steel sheet pile
JPS61148046A (en) * 1984-12-24 1986-07-05 大洋製鋼株式会社 Surface-treated metallic plate and manufacture thereof
JPS62194041A (en) * 1986-02-19 1987-08-26 Nippon Petrochem Co Ltd Spring covered by synthetic resin
JPH028043A (en) * 1988-03-31 1990-01-11 Kubota Ltd Polyethylene-coated steel material
MX9604003A (en) 1994-03-11 1997-12-31 Raychem Corp Curable polymeric composition and use in protecting a substrate.

Also Published As

Publication number Publication date
JPS56117642A (en) 1981-09-16

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