JPH06322346A - Production of synthetic resin-lining pipe and hot-melt adhesive - Google Patents

Production of synthetic resin-lining pipe and hot-melt adhesive

Info

Publication number
JPH06322346A
JPH06322346A JP10921493A JP10921493A JPH06322346A JP H06322346 A JPH06322346 A JP H06322346A JP 10921493 A JP10921493 A JP 10921493A JP 10921493 A JP10921493 A JP 10921493A JP H06322346 A JPH06322346 A JP H06322346A
Authority
JP
Japan
Prior art keywords
pipe
synthetic resin
weight
parts
peripheral surface
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
Application number
JP10921493A
Other languages
Japanese (ja)
Inventor
Yasuo Iketani
保男 池谷
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP10921493A priority Critical patent/JPH06322346A/en
Publication of JPH06322346A publication Critical patent/JPH06322346A/en
Pending legal-status Critical Current

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  • Adhesives Or Adhesive Processes (AREA)

Abstract

PURPOSE:To obtain a synthetic resin lining pipe excellent in durable adhesion under a good working environment by placing a specific hot-melt adhesive between the outer peripheral surface of a synthetic pipe and the inner peripheral surface of a metal pipe. CONSTITUTION:A method for producing a synthetic resin lining pipe comprises placing a hot-melt adhesive comprising (A) 100 pts.wt. of a hydrogenated butadiene-styrene block copolymer elastomer containing carboxyl groups and acid anhydride groups in the molecule, (B) 5-50 pts.wt. of a rubber phase- compatibilizing tackifying resin having a softening point of 70150 deg.C, (C) 10-50 pts.wt. of a terpene-phenol resin having a softening point of 120-160 deg.C, and (D) 1-50 pts.wt. of anhydrous silica between the outer peripheral surface of a synthetic resin pipe and the inner peripheral surface of a metal pipe, and subsequently heating and pressing the synthetic pipe so that the synthetic pipe expands to press and adhere to the metal pipe, or allowing the metal pipe to contract so that the metal pipe is pressed and made to adhere to the outer peripheral surface of the synthetic resin pipe.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、金属管の内周面に合成
樹脂管を接着する際に、特に接着剤を選択することによ
り、合成樹脂管と金属管との間の耐久接着性が高められ
た合成樹脂ライニング管を製造する方法、及びその接着
剤としてのホットメルト接着剤に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a durable adhesive property between a synthetic resin pipe and a metal pipe when the synthetic resin pipe is bonded to the inner peripheral surface of the metal pipe by selecting an adhesive. The present invention relates to a method for manufacturing an enhanced synthetic resin lining pipe and a hot melt adhesive as an adhesive thereof.

【0002】[0002]

【従来の技術】従来、合成樹脂ライニング管は、膨径法
あるいは縮径法と称されている方法により製造されてい
る。膨径法では、合成樹脂の外周面と金属管の内周面と
の間に接着剤を介在させた状態にて、合成樹脂管を加熱
加圧により膨径させることにより金属管に圧着させて、
合成樹脂管の外周面と金属管の内周面との間を接着させ
る(例えば、特開昭56─55227号公報、特開昭5
8─12720号公報、特開昭59─59418号公
報)。
2. Description of the Related Art Conventionally, a synthetic resin lining pipe has been manufactured by a method called an expansion method or a contraction method. In the swelling method, the synthetic resin tube is heated and pressurized to expand the diameter of the synthetic resin tube with an adhesive interposed between the outer peripheral surface of the synthetic resin and the inner peripheral surface of the metal tube, thereby crimping the metal tube. ,
The outer peripheral surface of the synthetic resin pipe and the inner peripheral surface of the metal pipe are adhered to each other (see, for example, JP-A-56-55227 and JP-A-5-55227).
8-12720, JP-A-59-59418).

【0003】他方、縮径法では、合成樹脂管の外周面と
金属管の内周面との間に接着剤を介在させた状態にて、
金属管をロール等により縮径させ、それによって合成樹
脂管の外周面と金属管の内周面とを圧着して接着させ
る。
On the other hand, in the diameter reduction method, an adhesive is interposed between the outer peripheral surface of the synthetic resin pipe and the inner peripheral surface of the metal pipe,
The diameter of the metal tube is reduced by a roll or the like, whereby the outer peripheral surface of the synthetic resin tube and the inner peripheral surface of the metal tube are pressure-bonded to each other.

【0004】上記のような従来の合成樹脂ライニング管
の製造方法では、接着剤として、ポリアミド系又はポリ
エステル系接着剤(特開昭55─55227号公報)、
ブタジエン−スチレンブロック共重合体エラストマー系
ホットメルト接着剤(特開昭58─12720号公
報)、あるいは不飽和脂肪族カルボン酸又はその無水物
を共重合したポリオレフィンを含む接着剤等が用いられ
ていた。
In the conventional method for producing a synthetic resin lining pipe as described above, a polyamide-based or polyester-based adhesive (Japanese Patent Laid-Open No. 55-55227) is used as an adhesive.
Butadiene-styrene block copolymer elastomer hot melt adhesives (Japanese Patent Laid-Open No. 58-12720), adhesives containing a polyolefin obtained by copolymerizing an unsaturated aliphatic carboxylic acid or its anhydride, and the like have been used. .

【0005】[0005]

【発明が解決しようとする課題】しかしながら、上記の
如き従来の製造方法により得られた合成樹脂ライニング
管では、合成樹脂管と金属管との間の耐久接着性が十分
でない。即ち、得られた合成樹脂ライニング管につい
て、冷熱サイクルテストを繰り返すと、合成樹脂管と金
属管との間の接着部分が剥離し易いという問題点があっ
た。又、従来の合成樹脂ライニング管の製造方法のう
ち、接着剤として溶剤型接着剤を用いる方法では、有機
溶剤により作業環境が汚染されたり、溶剤乾燥のために
多くの作業スペース及び工程が必要であるという問題点
もあった。
However, in the synthetic resin lining pipe obtained by the conventional manufacturing method as described above, the durable adhesion between the synthetic resin pipe and the metal pipe is not sufficient. That is, when the cold cycle test is repeated for the obtained synthetic resin lining pipe, there is a problem that the bonded portion between the synthetic resin pipe and the metal pipe is easily peeled off. Further, among the conventional synthetic resin lining pipe manufacturing methods, the method of using a solvent-type adhesive as the adhesive requires a lot of work space and steps for contaminating the working environment with an organic solvent and drying the solvent. There was also the problem that there was.

【0006】本発明の目的は、上記の如き従来の問題点
を解決し、膨径法又は縮径法により、合成樹脂管と金属
管との間の耐久接着性が高められた合成樹脂ライニング
管を製造する方法、及びその接着剤としてのホットメル
ト接着剤を提供することにある。
An object of the present invention is to solve the above-mentioned conventional problems and to improve the durability and adhesion between a synthetic resin pipe and a metal pipe by a swelling method or a diameter reducing method. To provide a hot melt adhesive as an adhesive thereof.

【0007】[0007]

【課題を解決するための手段】本願の請求項1の発明
(以下、本発明1という)は、合成樹脂管の外周面と金
属管の内周面との間に接着剤を介在させた状態にて、加
熱加圧により合成樹脂管を膨径させ金属管に圧着させて
接着するか、又は、金属管を縮径させ合成樹脂管の外周
面に圧着させて接着する合成樹脂ライニング管の製造方
法において、接着剤として、カルボン酸基もしくは酸無
水物基を分子中に含有する水添ブタジエン−スチレンの
ブロック共重合体エラストマー100重量部、軟化点7
0〜150℃のゴム相相溶粘着付与樹脂5〜50重量
部、軟化点120〜160℃のテルペン−フェノール樹
脂10〜50重量部、無水シリカ1〜50重量部を含有
するホットメルト接着剤を用いる合成樹脂ライニング管
の製造方法である。
According to the invention of claim 1 of the present application (hereinafter referred to as the present invention 1), an adhesive is interposed between the outer peripheral surface of the synthetic resin pipe and the inner peripheral surface of the metal pipe. Manufacturing of synthetic resin lining pipe in which the diameter of the synthetic resin pipe is expanded by heating and pressurizing and then pressure-bonded to the metal pipe, or the diameter of the metal pipe is reduced and pressure-bonded to the outer peripheral surface of the synthetic resin pipe. In the method, 100 parts by weight of a hydrogenated butadiene-styrene block copolymer elastomer containing a carboxylic acid group or an acid anhydride group in the molecule as an adhesive and a softening point of 7 are used.
A hot melt adhesive containing 5 to 50 parts by weight of a rubber compatible tackifying resin at 0 to 150 ° C., 10 to 50 parts by weight of a terpene-phenol resin having a softening point of 120 to 160 ° C., and 1 to 50 parts by weight of anhydrous silica. It is a manufacturing method of a synthetic resin lining pipe to be used.

【0008】本願の請求項2の発明(以下、本発明2と
いう)は、カルボン酸基もしくは酸無水物基を分子中に
含有する水添ブタジエン−スチレンのブロック共重合体
エラストマー100重量部、軟化点70〜150℃のゴ
ム相相溶粘着付与樹脂5〜50重量部、軟化点120〜
160℃のテルペン−フェノール樹脂10〜50重量
部、無水シリカ1〜50重量部を含有するホットメルト
接着剤である。
The invention of claim 2 of the present application (hereinafter referred to as the present invention 2) is 100 parts by weight of a hydrogenated butadiene-styrene block copolymer elastomer containing a carboxylic acid group or an acid anhydride group in the molecule, and softened. 5 to 50 parts by weight of a rubber compatible tackifying resin having a point of 70 to 150 ° C. and a softening point of 120 to
It is a hot melt adhesive containing 10 to 50 parts by weight of a terpene-phenol resin at 160 ° C. and 1 to 50 parts by weight of anhydrous silica.

【0009】本発明1において、合成樹脂管の外周面と
金属管の内周面との間に接着剤を介在させた状態とする
には、金属管の内周面又は合成樹脂管の外周面の少なく
とも一方に接着剤を塗布し、金属管内に合成樹脂管を挿
入する方法が採用される。ライニング方法としては、加
熱加圧により合成樹脂管を膨径させ金属管に圧着させて
接着する方法を採用してもよいし、又、金属管を縮径さ
せ合成樹脂管の外周面に圧着させて接着する方法を採用
してもよい。
According to the first aspect of the present invention, the inner peripheral surface of the metal tube or the outer peripheral surface of the synthetic resin tube is set in order that the adhesive is interposed between the outer peripheral surface of the synthetic resin tube and the inner peripheral surface of the metal tube. A method of applying an adhesive to at least one of the above and inserting a synthetic resin pipe into the metal pipe is adopted. As the lining method, a method of expanding the diameter of the synthetic resin tube by heating and pressurizing and adhering it to the metal tube by pressure bonding may be adopted. Alternatively, the diameter of the metal tube may be reduced and pressure bonding to the outer peripheral surface of the synthetic resin tube. Alternatively, a method of bonding may be adopted.

【0010】本発明1,2において、接着剤中には、カ
ルボン酸基もしくは酸無水物基を分子中に含有する水添
ブタジエン−スチレンブロック共重合体エラストマーを
含有する。水添ブタジエン−スチレンブロック共重合体
エラストマーとしては、例えば、ブタジエンポリマーブ
ロックの両端にスチレンポリマーブロックが結合された
構造を有するスチレン−ブタジエン−スチレンブロック
共重合体のブタジエンポリマー部分を水素添加したもの
を挙げることができ、これは硬質ブロックとしてのスチ
レン相と弾性ブロックとしてのエチレン−ブチレン相と
の2相構造を有している。
In the first and second inventions, the adhesive contains a hydrogenated butadiene-styrene block copolymer elastomer containing a carboxylic acid group or an acid anhydride group in the molecule. Examples of the hydrogenated butadiene-styrene block copolymer elastomer include those obtained by hydrogenating a butadiene polymer portion of a styrene-butadiene-styrene block copolymer having a structure in which styrene polymer blocks are bonded to both ends of a butadiene polymer block. It may be mentioned that it has a two-phase structure with a styrene phase as the hard block and an ethylene-butylene phase as the elastic block.

【0011】水添ブタジエン−スチレンブロック共重合
体エラストマーのスチレン含有率は、10〜50重量%
が好ましく、15〜35重量%が更に好ましい。スチレ
ン含有率が10重量%未満の場合には、樹脂の弾性率や
凝集力が低くなって接着剤に用いられた場合に接着強度
や耐熱性に問題が生じ易く、逆に50重量%を超える場
合には、弾性率が高くなりすぎて柔軟性を失い、いわゆ
る固い接着剤となって加熱時の流動性や剥離強度が低下
し易い傾向がある。又、水添ブタジエン−スチレンブロ
ック共重合体エラストマーは、合成樹脂ライニング管の
製造に用いるには、重量平均分子量が4万〜12万の範
囲にあるものが好適である。
The styrene content of the hydrogenated butadiene-styrene block copolymer elastomer is 10 to 50% by weight.
Is preferred and 15 to 35% by weight is more preferred. If the styrene content is less than 10% by weight, the elastic modulus and cohesive force of the resin will be low, and problems will occur in the adhesive strength and heat resistance when used in an adhesive. Conversely, if it exceeds 50% by weight. In this case, the elastic modulus tends to be too high and loses flexibility, resulting in a so-called hard adhesive, which tends to cause deterioration in fluidity and peel strength during heating. Further, the hydrogenated butadiene-styrene block copolymer elastomer preferably has a weight average molecular weight in the range of 40,000 to 120,000 for use in the production of synthetic resin lining pipes.

【0012】カルボン酸基又は酸無水物を分子中に含有
する水添ブタジエン−スチレンブロック共重合体エラス
トマー(以下、水添ブタジエン─スチレンブロック共重
合体エラストマーという)の製造方法は、特に限定され
ないが、得られる水添ブタジエン−スチレンブロック共
重合体エラストマーが、ゲル等の好ましくない成分を含
有したり、その溶融粘度が大きく低下して加工性が悪化
したりするような製造方法は好ましくない。製造方法と
しては、例えば、スチレン─エチレン─ブチレン─スチ
レン共重合体(SEBS)と不飽和カルボン酸又はその
無水物とを、溶融状態又は溶液状態において、グラフト
重合させる方法が挙げられる。
The method for producing a hydrogenated butadiene-styrene block copolymer elastomer containing a carboxylic acid group or an acid anhydride in the molecule (hereinafter referred to as hydrogenated butadiene-styrene block copolymer elastomer) is not particularly limited. It is not preferable that the resulting hydrogenated butadiene-styrene block copolymer elastomer contains an unfavorable component such as a gel, or that its melt viscosity is greatly reduced to deteriorate the processability. Examples of the production method include a method in which a styrene-ethylene-butylene-styrene copolymer (SEBS) and an unsaturated carboxylic acid or an anhydride thereof are graft-polymerized in a molten state or a solution state.

【0013】グラフトするカルボン酸又は酸無水物の例
としては、マレイン酸、フマル酸、イタコン酸、アクリ
ル酸、メタクリル酸、クロトン酸等があり、酸無水物と
しては、不飽和カルボン酸の酸無水物等が挙げられる
が、これらの中で、不飽和ジカルボン酸無水物が好まし
く、特に無水マレイン酸が好ましい。
Examples of the carboxylic acid or acid anhydride to be grafted include maleic acid, fumaric acid, itaconic acid, acrylic acid, methacrylic acid, crotonic acid, and the like. As the acid anhydride, an unsaturated carboxylic acid anhydride is used. Among these, unsaturated dicarboxylic acid anhydrides are preferable, and maleic anhydride is particularly preferable.

【0014】カルボン酸又は酸無水物のグラフト率は、
通常、0.01〜30重量%であり、好ましくは、0.
05〜10重量%である。グラフト率が0.01重量%
未満ではグラフトによる接着力向上が殆ど見られず、十
分な接着力を得にくい傾向がある。他方、30重量%を
超えても、カルボン酸基又は酸無水物基を含有する効果
がそれ以上大きくならない傾向がある。
The graft ratio of carboxylic acid or acid anhydride is
Usually, it is 0.01 to 30% by weight, and preferably 0.
It is from 05 to 10% by weight. Graft ratio is 0.01% by weight
If it is less than the above range, there is almost no improvement in adhesive strength due to grafting, and it tends to be difficult to obtain sufficient adhesive strength. On the other hand, even if it exceeds 30% by weight, the effect of containing a carboxylic acid group or an acid anhydride group tends not to increase further.

【0015】本発明1,2において、接着剤中には、水
添ブタジエン−スチレンブロック共重合体エラストマー
100重量部に対して、軟化点70〜150℃のゴム相
相溶粘着付与樹脂5〜50重量部を含有する。軟化点7
0〜150℃のゴム相相溶粘着付与樹脂は、水添ブタジ
エン−スチレンブロック共重合体エラストマーのエチレ
ン─ブチレン相に相溶し、その粘着性を増大させる作用
を有する。
In the first and second inventions, in the adhesive, a rubber compatible tackifying resin having a softening point of 70 to 150 ° C. is added to 50 to 50 parts by weight of a hydrogenated butadiene-styrene block copolymer elastomer. Contains parts by weight. Softening point 7
The rubber-compatible tackifier resin at 0 to 150 ° C. is compatible with the ethylene-butylene phase of the hydrogenated butadiene-styrene block copolymer elastomer and has the function of increasing its tackiness.

【0016】ゴム相相溶粘粘着付与樹脂の軟化点が70
℃より低いと、接着剤の耐熱性が低下し易く、逆に、1
50℃より高くなると粘着性あるいは接着性が発現しに
くくなる傾向がある。ゴム相相溶粘粘着付与樹脂の配合
量が5重量部より少ない場合には、接着力が十分でな
く、逆に、50重量部より多い場合には、水添ブタジエ
ン−スチレンブロック共重合体エラストマーのエチレン
─ブチレン相溶域が増大し、接着剤の凝集力が低下して
しまう。
The softening point of the rubber compatible tackifying resin is 70.
If the temperature is lower than ℃, the heat resistance of the adhesive tends to decrease, and conversely 1
If the temperature is higher than 50 ° C, tackiness or adhesiveness tends to be difficult to be exhibited. When the compounding amount of the rubber-compatible tackifier resin is less than 5 parts by weight, the adhesive force is not sufficient, and conversely, when it is more than 50 parts by weight, a hydrogenated butadiene-styrene block copolymer elastomer is used. The ethylene-butylene compatible region of the above increases, and the cohesive force of the adhesive decreases.

【0017】ゴム相相溶粘着付与樹脂の具体例として
は、例えば、脂環族系石油樹脂、脂肪族系石油樹脂、テ
ルペン樹脂等が挙げられるが、これらに限定されるもの
ではない。
Specific examples of the rubber-compatible tackifying resin include, but are not limited to, alicyclic petroleum resin, aliphatic petroleum resin, and terpene resin.

【0018】本発明1,2において、接着剤中には、水
添ブタジエン−スチレンブロック共重合体エラストマー
100重量部に対して、軟化点120〜160℃のテル
ペン−フェノール樹脂10〜50重量部を含有する。テ
ルペン−フェノール樹脂の軟化点が120℃より低い
と、接着剤の耐熱性が低下し、逆に、160℃より高く
なると、粘着性あるいは接着性が発現し難い。テルペン
−フェノール樹脂の配合量が10重量部よりも少ない場
合には、接着力が十分でなく、逆に、50重量部よりも
多い場合には、相分離構造が不明瞭化し、耐熱性に問題
が生じる。
In the first and second inventions, the adhesive contains 10 to 50 parts by weight of a terpene-phenol resin having a softening point of 120 to 160 ° C. with respect to 100 parts by weight of a hydrogenated butadiene-styrene block copolymer elastomer. contains. When the softening point of the terpene-phenol resin is lower than 120 ° C, the heat resistance of the adhesive is lowered, and conversely, when the softening point is higher than 160 ° C, the tackiness or the adhesiveness is difficult to develop. When the compounding amount of the terpene-phenol resin is less than 10 parts by weight, the adhesive force is not sufficient, and conversely, when it is more than 50 parts by weight, the phase separation structure becomes unclear and heat resistance becomes a problem. Occurs.

【0019】本発明1,2において、接着剤中には、水
添ブタジエン−スチレンブロック共重合体エラストマー
100重量部に対して、無水シリカ(SiO2 )を1〜
50重量部を含有する。無水シリカは、四塩化ケイ素を
酸水素焔中で高温加水分解して得られる高分散性のもの
であり、その一次粒子径が7〜40nm、比表面積が50
〜380m2 /gを有するものである。又、粒子分散性
向上等のため表面処理を施してもよい。無水シリカの配
合量が、1重量部より少ない場合には、効果発現に難が
あり、逆に、50重量部より多い場合には、接着性に問
題がある。
In the present invention 1 and 2, in the adhesive, 1 to 100 parts by weight of hydrogenated butadiene-styrene block copolymer elastomer is used and 1 to 1 parts of anhydrous silica (SiO 2 ).
It contains 50 parts by weight. Anhydrous silica is a highly dispersible product obtained by hydrolyzing silicon tetrachloride in oxyhydrogen flame at high temperature, and has a primary particle size of 7 to 40 nm and a specific surface area of 50.
˜380 m 2 / g. In addition, surface treatment may be performed to improve particle dispersibility. When the compounding amount of anhydrous silica is less than 1 part by weight, it is difficult to realize the effect, and when it is more than 50 parts by weight, there is a problem in adhesion.

【0020】又、本発明1,2において、接着剤中に
は、炭酸カルシウム、燐酸バリウム、クレー、タルク又
は酸化チタン等の充填剤、例えば、ナフテン系、アロマ
系、パラフィン系オイル等の流動性調整剤、ジオクチル
フタレート(DOP)やジブチルフタレート(DBP)
等の可塑剤、酸化防止剤等も必要に応じて添加すること
ができる。
Further, in the present inventions 1 and 2, fillers such as calcium carbonate, barium phosphate, clay, talc or titanium oxide are contained in the adhesive, for example, fluidity of naphthene-based, aroma-based, paraffin-based oil and the like. Regulator, dioctyl phthalate (DOP) and dibutyl phthalate (DBP)
Plasticizers such as the above, antioxidants and the like can be added as required.

【0021】本発明1において、金属管としては、例え
ば、鋼管、アルミニウム管等が挙げられる。本発明1に
おいて、合成樹脂管としては、例えば、塩化ビニル樹脂
管、塩素化塩化ビニル樹脂管、ポリエチレン、ポリプロ
ピレン等からなるのポリオレフィン系樹脂管等が使用さ
れる。
In the present invention 1, examples of the metal tube include a steel tube and an aluminum tube. In the present invention 1, as the synthetic resin pipe, for example, a vinyl chloride resin pipe, a chlorinated vinyl chloride resin pipe, a polyolefin resin pipe made of polyethylene, polypropylene or the like is used.

【0022】[0022]

【作用】本発明1の合成樹脂ライニング管の製造方法、
及び、本発明2のホットメルト接着剤は、カルボン酸基
もしくは酸無水物基を分子中に含有する水添ブタジエン
−スチレンのブロック共重合体エラストマー100重量
部、軟化点70〜150℃のゴム相相溶粘着付与樹脂5
〜50重量部、軟化点120〜160℃のテルペン−フ
ェノール樹脂10〜50重量部、無水シリカ1〜50重
量部を含有するホットメルト接着剤を用いることによ
り、合成樹脂管と金属管との間に両者の膨張率の違いに
よるひずみ力が作用した場合に、接着剤が合成樹脂管の
外周面に対しても金属管の内周面に対してもほぼ均等な
接着力にて強固に接着するので、熱水浸漬時の水の浸透
が少なくて耐熱水性に優れており、耐久接着性が高めら
れた合成樹脂ライニング管を得ることができる。
The method of manufacturing the synthetic resin lining pipe of the present invention 1,
And, the hot melt adhesive of the present invention 2 is 100 parts by weight of a hydrogenated butadiene-styrene block copolymer elastomer containing a carboxylic acid group or an acid anhydride group in the molecule, and a rubber phase having a softening point of 70 to 150 ° C. Compatible tackifier resin 5
Between a synthetic resin pipe and a metal pipe by using a hot melt adhesive containing -50 parts by weight, 10-50 parts by weight of a terpene-phenol resin having a softening point of 120-160 ° C, and 1-50 parts by weight of anhydrous silica. When a strain force due to the difference in expansion coefficient between them acts on the adhesive, the adhesive firmly adheres to the outer peripheral surface of the synthetic resin pipe and the inner peripheral surface of the metal pipe with almost uniform adhesive force. Therefore, it is possible to obtain a synthetic resin lining pipe that has less water penetration when immersed in hot water, has excellent hot water resistance, and has improved durable adhesion.

【0023】[0023]

【実施例】以下、本発明の実施例及び比較例を挙げるこ
とにより、本発明を明らかにする。実施例1 2重量%無水マレイン酸変性SEBS(旭化成社製、商
品名「タフテックM1913」、スチレン含有量約30
%、分子量:約5万)100重量部に、脂環族飽和炭化
水素樹脂(荒川化学社製、商品名「アルコンP─10
0」、軟化点100℃)30重量部と、テルペンフェノ
ール樹脂(ヤスハラケミカル社製、商品名「YSポリス
ターS−145」、軟化点145℃)30重量部と、一
次粒子径16nm、BET比表面積130m2 /gの無
水シリカ(日本アエロジル社製、商品名「アエロジル1
30」)10重量部とを配合し、160℃で10分間熱
溶融混練して、ホットメルト接着剤を得た。
EXAMPLES The present invention will be clarified by giving Examples and Comparative Examples of the present invention. Example 1 2 wt% maleic anhydride-modified SEBS (manufactured by Asahi Kasei Corp., trade name "Tuftec M1913", styrene content about 30)
%, Molecular weight: about 50,000) 100 parts by weight of alicyclic saturated hydrocarbon resin (manufactured by Arakawa Chemical Co., Ltd., trade name "ALCON P-10"
0 ", softening point 100 ° C) 30 parts by weight, terpene phenol resin (manufactured by Yasuhara Chemical Co., trade name" YS Polystar S-145 ", softening point 145 ° C) 30 parts by weight, primary particle diameter 16 nm, BET specific surface area 130 m. 2 / g anhydrous silica (Nippon Aerosil Co., Ltd., trade name "Aerosil 1
30 ") and 10 parts by weight, and melt-kneaded at 160 ° C. for 10 minutes to obtain a hot-melt adhesive.

【0024】実施例2 無水シリカとして、一次粒子径12nm、BET比表面
積200m2 /gの無水シリカ(日本アエロジル社製、
商品名「アエロジル200」)10重量部とを配合した
こと以外は実施例1と同様にして、ホットメルト接着剤
を得た。
Example 2 As anhydrous silica, anhydrous silica having a primary particle diameter of 12 nm and a BET specific surface area of 200 m 2 / g (manufactured by Nippon Aerosil Co., Ltd.,
A hot melt adhesive was obtained in the same manner as in Example 1 except that 10 parts by weight of the product name "Aerosil 200") was blended.

【0025】実施例3 無水シリカとして、一次粒子径14nm、BET比表面
積100m2 /gの無水シリカ(日本アエロジル社製、
商品名「アエロジルR202」、シリコーンオイル表面
処理品)5重量部とを配合したこと以外は実施例1と同
様にして、ホットメルト接着剤を得た。
Example 3 As anhydrous silica, anhydrous silica having a primary particle diameter of 14 nm and a BET specific surface area of 100 m 2 / g (manufactured by Nippon Aerosil Co., Ltd.,
A hot melt adhesive was obtained in the same manner as in Example 1 except that 5 parts by weight of the product name "Aerosil R202" and a silicone oil surface-treated product were blended.

【0026】実施例4 無水シリカとして、一次粒子径14nm、BET比表面
積100m2 /gの無水シリカ(日本アエロジル社製、
商品名「アエロジルR202」、シリコーンオイル表面
処理品)10重量部とを配合したこと以外は実施例1と
同様にして、ホットメルト接着剤を得た。
Example 4 As anhydrous silica, anhydrous silica having a primary particle diameter of 14 nm and a BET specific surface area of 100 m 2 / g (manufactured by Nippon Aerosil Co., Ltd.,
A hot melt adhesive was obtained in the same manner as in Example 1 except that 10 parts by weight of the product name "Aerosil R202" and a silicone oil surface-treated product were mixed.

【0027】実施例5 無水シリカとして、一次粒子径14nm、BET比表面
積100m2 /gの無水シリカ(日本アエロジル社製、
商品名「アエロジルR202」、シリコーンオイル表面
処理品)30重量部とを配合したこと以外は実施例1と
同様にして、ホットメルト接着剤を得た。
Example 5 As anhydrous silica, anhydrous silica having a primary particle diameter of 14 nm and a BET specific surface area of 100 m 2 / g (manufactured by Nippon Aerosil Co., Ltd.,
A hot melt adhesive was obtained in the same manner as in Example 1 except that 30 parts by weight of the product name "Aerosil R202" and a silicone oil surface-treated product were blended.

【0028】比較例1 無水シリカを配合しなかったこと以外は実施例1と同様
にして、ホットメルト接着剤を得た。
Comparative Example 1 A hot melt adhesive was obtained in the same manner as in Example 1 except that anhydrous silica was not added.

【0029】比較例2 無水シリカの代わりに、重質炭酸カルシウム(白石カル
シウム社製、商品名「ホワイトンSB」、平均粒子径
1.8μm、比表面積120m2 /g)10重量部を配
合したこと以外は実施例1と同様にして、ホットメルト
接着剤を得た。
Comparative Example 2 10 parts by weight of heavy calcium carbonate (manufactured by Shiraishi Calcium Co., trade name “Whiten SB”, average particle diameter 1.8 μm, specific surface area 120 m 2 / g) was blended in place of anhydrous silica. A hot melt adhesive was obtained in the same manner as in Example 1 except for the above.

【0030】比較例3 無水シリカの代わりに、重質炭酸カルシウム(白石カル
シウム社製、商品名「ホワイトンSB」、平均粒子径
1.8μm、比表面積120m2 /g)30重量部を配
合したこと以外は実施例1と同様にして、ホットメルト
接着剤を得た。
Comparative Example 3 In place of anhydrous silica, 30 parts by weight of heavy calcium carbonate (manufactured by Shiraishi Calcium Co., trade name “Whiten SB”, average particle diameter 1.8 μm, specific surface area 120 m 2 / g) was blended. A hot melt adhesive was obtained in the same manner as in Example 1 except for the above.

【0031】比較例4 無水シリカの代わりに、コロイド状炭酸カルシウム(丸
尾カルシウム社製、商品名「カルファイン─200
M」、平均粒子径0.05μm、比表面積23m2
g、脂肪酸表面処理)10重量部を配合したこと以外は
実施例1と同様にして、ホットメルト接着剤を得た。
Comparative Example 4 Instead of anhydrous silica, colloidal calcium carbonate (manufactured by Maruo Calcium Co., trade name "Calfine 200"
M ”, average particle diameter 0.05 μm, specific surface area 23 m 2 /
g, fatty acid surface treatment), and a hot melt adhesive was obtained in the same manner as in Example 1 except that 10 parts by weight were blended.

【0032】比較例5 無水シリカの代わりに、コロイド状炭酸カルシウム(丸
尾カルシウム社製、商品名「カルファイン─200
M」、平均粒子径0.05μm、比表面積23m2
g、脂肪酸表面処理)30重量部を配合したこと以外は
実施例1と同様にして、ホットメルト接着剤を得た。
Comparative Example 5 Instead of anhydrous silica, colloidal calcium carbonate (manufactured by Maruo Calcium Co., trade name "Calfine 200"
M ”, average particle diameter 0.05 μm, specific surface area 23 m 2 /
g, fatty acid surface treatment). A hot melt adhesive was obtained in the same manner as in Example 1 except that 30 parts by weight was added.

【0033】実施例1〜5、比較例1〜5の各ホットメ
ルト接着剤の配合組成を表1に示す。
Table 1 shows the composition of each hot melt adhesive of Examples 1 to 5 and Comparative Examples 1 to 5.

【0034】[0034]

【表1】 [Table 1]

【0035】上記のようにして用意した実施例1〜5、
比較例1〜5の各ホットメルト接着剤を用いて、下記の
(1)小試験片接着性評価及び(2)ライニング管試験
の2種類の試験方法により、接着性能評価を行った。そ
の結果を表2及び表3に示す。
Examples 1 to 5 prepared as described above,
Using each of the hot melt adhesives of Comparative Examples 1 to 5, the adhesive performance was evaluated by the following two test methods (1) small test piece adhesiveness evaluation and (2) lining tube test. The results are shown in Tables 2 and 3.

【0036】(1)小試験片接着性評価(90°剥離試
験) 被着体として、25mm×125mm×厚さ1.6
mmのJIS G3141に規定された冷間圧延鋼板
と、25mm×125mm×厚さ1.6mmの帆布(9
号)とを用意し、接着剤(厚み:約100〜150μ)
で両者を貼り合わせ、温度150℃×加圧2Kg/cm
2 の条件で接着させた。それらの初期常態接着性、並び
に、85℃の熱水に3日間浸漬した後、50℃×6時間
減圧乾燥し、90°剥離試験(測定温度:23℃、引張
り速度:50mm/min)を行い熱水浸漬後接着性を
評価した。
(1) Evaluation of Small Test Piece Adhesion (90 ° Peeling Test) As an adherend, 25 mm × 125 mm × thickness 1.6
mm cold-rolled steel sheet specified in JIS G3141 and 25 mm x 125 mm x 1.6 mm thick canvas (9
No.) and an adhesive (thickness: about 100 to 150 μ)
Both are stuck together at a temperature of 150 ° C and a pressure of 2 Kg / cm.
Bonded under the condition of 2 . After their initial normal-state adhesiveness and immersion in hot water of 85 ° C. for 3 days, they were dried under reduced pressure at 50 ° C. for 6 hours and subjected to a 90 ° peel test (measurement temperature: 23 ° C., pulling speed: 50 mm / min). After immersion in hot water, the adhesiveness was evaluated.

【0037】 被着体として、25mm×125mm
×厚さ4mmの塩素化塩化ビニル樹脂板板と、25mm
×125mm×厚さ1.6mmの帆布(9号)とを用意
し、接着剤(厚み:約100〜150μ)で両者を貼り
合わせ、温度150℃×加圧2Kg/cm2 の条件で接
着させた。それらの初期常態接着性、並びに、85℃の
熱水に3日間浸漬した後、50℃×6時間減圧乾燥し、
90°剥離試験(測定温度:23℃、引張り速度:50
mm/min)を行い熱水浸漬後接着性を評価した。
As an adherend, 25 mm × 125 mm
× Chlorinated vinyl chloride resin plate with a thickness of 4 mm and 25 mm
X 125 mm x 1.6 mm thick canvas (No. 9) was prepared, and the two were pasted together with an adhesive (thickness: about 100 to 150 µ) and bonded under the conditions of a temperature of 150 ° C and a pressure of 2 Kg / cm 2. It was After their initial normal-state adhesiveness and immersion in hot water of 85 ° C. for 3 days, they are dried under reduced pressure at 50 ° C. for 6 hours,
90 ° peel test (measurement temperature: 23 ° C, pulling speed: 50
mm / min) and the adhesiveness was evaluated after immersion in hot water.

【0038】(2)ライニング管試験(縮径法によるラ
イニング管作製方法及びその評価) 塩素化塩化ビニル樹脂管(外径:52mm)の外周面に
接着剤(厚み:約100〜150μ)を塗布し、内径5
3mmの鋼管内に挿入し、ロールにより鋼管を縮径後、
100℃×2時間養生してライニング鋼管を製造した。
しかる後、得られた合成樹脂ライニング管について、初
期接着性評価を打診法により評価した。又、冷熱サイク
ルテスト後の接着状態評価を、作製された合成樹脂ライ
ニング管を23℃の冷水浸漬(5分)と85℃の熱水浸
漬(5分)への繰り返し試験を500サイクル行った
後、打診法により行った。尚、表3中の接着性評価にお
いて、○:接着部分に剥れなし、△:接着部分に一部剥
れあり、×:接着部分のほぼ全体に剥れありをそれぞれ
示す。
(2) Lining pipe test (a method for producing a lining pipe by the diameter reduction method and its evaluation) An adhesive (thickness: about 100 to 150 μm) was applied to the outer peripheral surface of a chlorinated vinyl chloride resin pipe (outer diameter: 52 mm). And inside diameter 5
Insert into a 3 mm steel pipe, reduce the diameter of the steel pipe with a roll,
A lining steel pipe was manufactured by curing at 100 ° C for 2 hours.
Thereafter, the obtained synthetic resin lining tube was evaluated for initial adhesiveness by a percussion method. In addition, after evaluating the adhesion state after the cold / heat cycle test, after repeating the synthetic resin lining pipe thus prepared, it was repeatedly immersed in cold water at 23 ° C. (5 minutes) and hot water at 85 ° C. (5 minutes) for 500 cycles. , Percussion method. In the adhesiveness evaluation in Table 3, ∘: no peeling at the bonded portion, Δ: partial peeling at the bonded portion, x: peeling at almost the entire bonded portion, respectively.

【0039】[0039]

【表2】 [Table 2]

【0040】[0040]

【表3】 [Table 3]

【0041】以上の結果から明らかなように、本発明の
実施例1〜5の場合は、実施例1〜5の場合は、比較例
1〜5と比較して、小試験片接着強度に優れており、
又、合成樹脂ライニング管を作製し冷熱サイクルを繰り
返した後においても、金属管と合成樹脂管との間に剥離
が発生せず、耐熱水接着性が優れている。
As is clear from the above results, in the case of Examples 1 to 5 of the present invention, in the case of Examples 1 to 5, the small test piece has excellent adhesive strength as compared with Comparative Examples 1 to 5. And
Further, even after the synthetic resin lining pipe is manufactured and the cooling / heating cycle is repeated, peeling does not occur between the metal pipe and the synthetic resin pipe, and the hot water adhesive property is excellent.

【0042】[0042]

【発明の効果】本発明1の合成樹脂ライニング管の製造
方法、及び、本発明2のホットメルト接着剤、及びは、
それぞれ、上記の如き構成とされているので、耐久接着
性が高められた合成樹脂ライニング管を得ることができ
る。
The method for producing a synthetic resin lining pipe of the present invention 1 and the hot melt adhesive of the present invention 2, and
Since each of them is configured as described above, it is possible to obtain a synthetic resin lining pipe having enhanced durable adhesion.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 合成樹脂管の外周面と金属管の内周面と
の間に接着剤を介在させた状態にて、加熱加圧により合
成樹脂管を膨径させ金属管に圧着させて接着するか、又
は、金属管を縮径させ合成樹脂管の外周面に圧着させて
接着する合成樹脂ライニング管の製造方法において、接
着剤として、カルボン酸基もしくは酸無水物基を分子中
に含有する水添ブタジエン−スチレンのブロック共重合
体エラストマー100重量部、軟化点70〜150℃の
ゴム相相溶粘着付与樹脂5〜50重量部、軟化点120
〜160℃のテルペン−フェノール樹脂10〜50重量
部、無水シリカ1〜50重量部を含有するホットメルト
接着剤を用いることを特徴とする合成樹脂ライニング管
の製造方法。
1. A synthetic resin pipe is expanded by heat and pressure with an adhesive agent interposed between the outer peripheral surface of the synthetic resin pipe and the inner peripheral surface of the metal pipe, and is bonded to the metal pipe by pressure bonding. Or, in the method for producing a synthetic resin lining tube in which a metal tube is reduced in diameter and pressure-bonded to the outer peripheral surface of the synthetic resin tube to be bonded, a carboxylic acid group or an acid anhydride group is contained in the molecule as an adhesive. 100 parts by weight of hydrogenated butadiene-styrene block copolymer elastomer, 5 to 50 parts by weight of a rubber compatible tackifying resin having a softening point of 70 to 150 ° C., and a softening point of 120
A method for producing a synthetic resin lining pipe, which comprises using a hot melt adhesive containing 10 to 50 parts by weight of a terpene-phenol resin at 1 to 160 ° C and 1 to 50 parts by weight of anhydrous silica.
【請求項2】 カルボン酸基もしくは酸無水物基を分子
中に含有する水添ブタジエン−スチレンのブロック共重
合体エラストマー100重量部、軟化点70〜150℃
のゴム相相溶粘着付与樹脂5〜50重量部、軟化点12
0〜160℃のテルペン−フェノール樹脂10〜50重
量部、無水シリカ1〜50重量部を含有することを特徴
とするホットメルト接着剤。
2. 100 parts by weight of a hydrogenated butadiene-styrene block copolymer elastomer containing a carboxylic acid group or an acid anhydride group in the molecule, and a softening point of 70 to 150 ° C.
5 to 50 parts by weight of rubber-compatible tackifying resin, softening point 12
A hot-melt adhesive containing 10 to 50 parts by weight of a terpene-phenol resin at 0 to 160 ° C. and 1 to 50 parts by weight of anhydrous silica.
JP10921493A 1993-05-11 1993-05-11 Production of synthetic resin-lining pipe and hot-melt adhesive Pending JPH06322346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10921493A JPH06322346A (en) 1993-05-11 1993-05-11 Production of synthetic resin-lining pipe and hot-melt adhesive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10921493A JPH06322346A (en) 1993-05-11 1993-05-11 Production of synthetic resin-lining pipe and hot-melt adhesive

Publications (1)

Publication Number Publication Date
JPH06322346A true JPH06322346A (en) 1994-11-22

Family

ID=14504495

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10921493A Pending JPH06322346A (en) 1993-05-11 1993-05-11 Production of synthetic resin-lining pipe and hot-melt adhesive

Country Status (1)

Country Link
JP (1) JPH06322346A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10279774A (en) * 1997-02-10 1998-10-20 Mitsubishi Chem Corp Resin composition for adhesion, laminate and drawn film
JPH11131037A (en) * 1997-10-29 1999-05-18 Mitsubishi Chemical Corp Resin composition for adhesion, laminate and oriented film
US20130245208A1 (en) * 2012-03-16 2013-09-19 Nitto Denko Corporation Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet
EP3477176A1 (en) 2017-10-25 2019-05-01 Evonik Degussa GmbH Method for manufacturing a tube clad with an inner liner

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10279774A (en) * 1997-02-10 1998-10-20 Mitsubishi Chem Corp Resin composition for adhesion, laminate and drawn film
JPH11131037A (en) * 1997-10-29 1999-05-18 Mitsubishi Chemical Corp Resin composition for adhesion, laminate and oriented film
US20130245208A1 (en) * 2012-03-16 2013-09-19 Nitto Denko Corporation Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet
EP3477176A1 (en) 2017-10-25 2019-05-01 Evonik Degussa GmbH Method for manufacturing a tube clad with an inner liner
WO2019081572A1 (en) 2017-10-25 2019-05-02 Evonik Degussa Gmbh Method for producing a pipe lined with an inner liner
US11204111B2 (en) 2017-10-25 2021-12-21 Evonik Operations Gmbh Method for producing a pipe lined with an inner liner

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