JP3994510B2 - Adhesive composition for adhesive bonding of rubber and thermoplastic elastomer and adhesive sheet - Google Patents

Adhesive composition for adhesive bonding of rubber and thermoplastic elastomer and adhesive sheet Download PDF

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Publication number
JP3994510B2
JP3994510B2 JP07182498A JP7182498A JP3994510B2 JP 3994510 B2 JP3994510 B2 JP 3994510B2 JP 07182498 A JP07182498 A JP 07182498A JP 7182498 A JP7182498 A JP 7182498A JP 3994510 B2 JP3994510 B2 JP 3994510B2
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Japan
Prior art keywords
rubber
adhesive
pressure
weight
sensitive adhesive
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JPH11269437A (en
Inventor
伸一 市原
弘介 田辺
昭洋 山田
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DIC Corp
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Dainippon Ink and Chemicals Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、天然ゴム、クロロプレンゴム、EPT(エチレン−プロピレン−ターポリマー)ゴム等のゴム類や、オレフィン系、スチレン系、塩ビ系、ウレタン系等の熱可塑性エラストマー類からなる成形品を接着するために用いる粘着剤及び粘着シート類に関する。
【0002】
【従来の技術】
ゴムや熱可塑性エラストマーの成形品(以下ゴム等の成形品)は、自動車用部材、家電、OA機器用部材の他、各種工業用製品に多く使われている。ところが、ゴム等の成形品は、一般に、各種充填剤、加硫剤、油分、可塑剤等が配合されていたり、成形品を加硫する場合には、プレス金型から容易に型離れさせるためにシリコーンオイル等の離型剤等が成形品の表面に付着しているため、成形品への接着強度が低い。又、ゴム等の成形品をテープ類で曲面に貼り付ける場合などは、成形品の弾性が高いため、接着性の悪さから剥がれ易いという問題があった。
【0003】
従って、これまでは被着体としてのゴム等の成形品の表面をバフ研磨、溶剤洗浄、プライマー塗工の順で処理し、粘着テープ類を貼合せ被着体に貼り付ける方法が取られていた。しかしプライマーや溶剤を使用するため作業環境が悪く、かつ作業工程も複雑であり、バフ研磨のばらつきにより接着性がばらつくといった問題があった。
【0004】
これらの問題を解決するために、特開平5−78634では、ポリイソブチレン等からなる高分子量ゴム質ポリマーに対し、中分子量の液状ないし半液状のゴムと低分子量の粘着付与剤及び/又は軟化剤を加えるとともに、ゲル分率を10から40%に設定した粘着剤及び粘着シートが、EPTゴム等にバフ研磨等の処理をしなくとも充分な接着力を発揮すると開示されている。しかし、この粘着シートは、粘着剤配合時のすねり工程や粘着剤を基材上の塗工した後に、高温で長時間の加硫熟成が必要であり、また加硫剤や加硫促進剤に過酸化物系の化合物やチウラム系化合物を使用するため取扱い及び安全上問題が多い。
【0005】
【発明が解決しようとする課題】
本発明の課題は、上記事情に鑑み、被着体であるゴム等の成形品に対するバフ研磨工程を省略でき、かつ、粘着剤に対するすねり工程、高温加硫工程が不要で安全上問題のある過酸化物等を含まなくとも、充分な凝集力、接着強度を発揮できる粘着剤及び粘着シート類を提供することにある。
【0006】
【課題を解決するための手段】
本発明者らは鋭意検討した結果、特定のジブロック量を持つSISブロックコポリマーと特定の粘着付与樹脂からなる粘着剤が、安全上問題の多い過酸化物等を含まず、すねり工程や高温での長時間加硫の必要がなく、且つ、被着体に対するバフ研磨等の処理を施さなくとも充分な接着強度を得ることを見いだし本発明を完成するに至った。
【0007】
即ち、本発明の第一の構成は、SISブロックコポリマー100重量部と、粘着付与樹脂60〜200重量部を必須成分として含有する粘着剤において、該SISブロックコポリマー中のジブロック量が30〜80重量%であり、該粘着付与樹脂がC5石油系樹脂を含み、且つ、粘着付与樹脂量の10〜30重量%が常温で液状の粘着付与樹脂及び/又は軟化剤であることを特徴とする、ゴム、熱可塑性エラストマー接着用粘着剤である。
【0008】
又、本発明の構成は、前記した粘着付与樹脂が、更に、テルペン系樹脂及び/又は重合ロジンエステル系樹脂を含むものであるゴム、熱可塑性エラストマー接着用粘着剤である。
【0009】
更に、本発明の第二の構成は、支持体の少なくとも片面に前記した粘着剤を設けたことを特徴とするゴム、熱可塑性エラストマー接着用粘着シートである。
【0010】
【発明の実施の形態】
本発明に使用するSISブロックコポリマーは、ジブロック量が30〜80重量%であること以外が特に限定されるものではない。ジブロック量が30重量%未満では、ゴム等の成形品に対し充分な接着強度が得られない。80重量%を越えると粘着剤の凝集力が著しく低下する。SISブロックコポリマーの分子量は、1万〜80万の範囲にあることが好ましく、より好ましくは3万〜50万の範囲にあるのが良い。1万未満では粘着剤の凝集力が著しく低下する。一方、80万を越えるとゴム等の成形品に対し濡れが減少し充分な接着強度が得られない。
【0011】
本発明に使用するC5石油系樹脂は、一般にナフサの分解で得られるC5留分よりイソプレン及びシクロペンタジエンを抽出分離した残りを重合した樹脂であるが、例えば、エスコレッツ1202、1304、1401(トーネックス製)、ウイングタック95(グッドイヤー製)、クイントンK100、R100、F100(日本ゼオン製)、ピコタック95、ピコペール100(理化ハーキュレス製)等が挙げられる。
【0012】
本発明に使用するC5石油系樹脂以外の粘着付与樹脂としては、テルペン系樹脂、ロジン系樹脂、テルペン−フェノール樹脂、スチレン系樹脂、クマロン−インデン樹脂、キシレン樹脂、フェノール樹脂、C5以外の石油樹脂(芳香族系、脂環族系等)が挙げられる。好ましくは、重合ロジンエステル樹脂、テルペン系樹脂が挙げられる。
【0013】
本発明に使用する粘着付与樹脂の総量が60重量部未満の場合は、ゴム等の成形品への接着強度が低下し、耐湿劣化後の接着性も低下する。総量が200重量部を越える場合は、耐熱保持力が悪化する。
【0014】
本発明に使用する液状の粘着付与樹脂及び/又は軟化剤は、例えば、室温で液状の上記粘着付与樹脂や、プロセスオイル、ポリエステル系可塑剤、ポリブテン等の低分子量の液状ゴムが挙げられる。粘着付与樹脂総量に占める液状粘着付与樹脂及び/又は軟化剤の割合は、10〜30重量%である。10重量%未満ではゴム等の成形品への濡れ性が悪くなり接着強度が低下する。30重量%を越えると、耐熱保持力が著しく低下する。
【0015】
本発明においては、他のポリマー成分や、架橋剤が使用出来る。また粘着剤で一般に用いられる各種添加剤、例えば、酸化防止剤、紫外線吸収剤、充填剤、顔料、増粘剤等を、接着強度を低下しない範囲で使用することが出来る。このようにして調整される本発明の合成ゴム系粘着剤は、通常トルエン、ヘキサン等の有機溶剤に希釈され、溶液状で、又は高温で溶融され、ゴム等の成形品の接着用途の粘着剤として使用される。
【0016】
この粘着剤を直接被着体に塗工しても良いが、一般に支持体の少なくとも片面に設けられ、テープ状、シート状で使用されるが、ゴム等の成形品を被着体に接着するという目的から支持体の両面に粘着剤を設けた両面テープ状にすることが望ましい。通常は剥離紙にいったん上記粘着剤を設け(溶液の場合は塗工後乾燥する)支持体の両面に貼り合わせる。支持体としては特に限定されないが、例えば、不織布、布、紙等の多孔質支持体や、ポリエステルフィルム、ポリエチレンフィルム、ポリプロピレンフィルム、ポリ塩化ビニルフィルム等のプラスチックフィルムが挙げられる。厚さは通常5〜200μm程度のものが使用される。又支持体への密着性を向上するために、コロナ処理やプライマー処理を行ってもよい。
【0017】
支持体上に設ける粘着剤の厚みは、通常10〜400μm程度が好ましいが、これに限定されるものではない。又、支持体の片面に上記ゴム等の成形品接着用粘着剤を設けて、他方にアクリル系粘着剤等の異なった粘着剤を設けたディファレンシャルタイプの両面テープ仕様にしてもよい。
【0018】
【実施例】
以下に本発明の実施例について具体的に記すが、これに限定されるものではない。
【0019】
SISブロックコポリマー、粘着付与樹脂、液状粘着付与樹脂/軟化剤及び酸化防止剤を表1に掲げる重量割合で配合し、トルエンに溶解して粘着剤溶液を調整した。この溶液をアプリケータを用いて、乾燥後の厚さが60μmとなるように、セパレータ上に塗布し、80℃で3分間乾燥した。次に、上記セパレータ上に形成された粘着剤の層を2つ用意して、これらを厚さ50μmの不織布の両面に貼り合わせた後、90℃、4kgf/cm2 の加圧にてラミネートを行い、両面粘着シートを作製した。
【0020】
比較例としてSISブロックコポリマー、粘着付与樹脂、液状粘着付与樹脂/軟化剤及び酸化防止剤を表2に掲げる重量割合で配合し、実施例と同様に、粘着剤溶液及び両面粘着シートを作製した。
【0021】
以上の実施例1〜4及び比較例1〜5で得られた両面接着シートについて、接着力、耐熱保持力、耐湿劣化性及び耐反発性の評価を行った。以下、評価結果を表1及び表2に示す。尚、評価は、下記の要領にて行った。
【0022】
〈接着力〉:EPT(エチレン−プロピレン−ターポリマー)ゴム及びクロロプレンゴムに、両面粘着シートを2kg×1往復の加圧にて貼付し、30分後に引張速度300mm/minにて180゜剥離接着力を測定した。
【0023】
〈耐熱保持力〉:JIS−Z0237に規定された鋼板に、貼付面積20mm幅×20mmにて両面粘着シートを貼付し、70℃下にて、荷重500gを掛けた時の落下時間を測定した。
【0024】
〈耐湿劣化性〉:EPTゴムに、両面粘着シートを2kg×1往復の加圧にて貼付し、50℃、95%RHの環境下にて7日間放置後の接着力の低下を評価した。
◎:耐湿劣化後の接着力の低下なし
○:接着力の大幅な低下なし(初期の80%以上)
×:接着力の大幅な低下あり(初期の50%以下)
【0025】
〈耐反発性〉:20mm幅のEPTゴムを、90゜に折曲げたアルミ板に両面粘着シートにてエッジ部が10mmの長さになるように貼付し、50℃、95%RHの環境下にて7日間放置後の剥がれ状態を評価した。
◎:剥がれなし
○:浮き有り
×:全面剥がれ
【0026】
尚、上記の評価において、被着体のEPTゴム、クロロプレンゴムは、厚さ1mm、硬度60゜(クラレ製)のものを使用した。配合及び評価結果を以下の表1、2に示す。
【0027】
【表1】

Figure 0003994510
【0028】
【表2】
Figure 0003994510
【0029】
上記表1、2中の▲1▼〜▲9▼は以下の通りである。
▲1▼重量平均分子量20万、スチレン量14重量%。
▲2▼重量平均分子量17万、スチレン量16重量%
▲3▼重量平均分子量17万、スチレン量15重量%
▲4▼C5石油系樹脂 :数平均分子量 885、軟化点100℃
▲5▼C5石油系樹脂 :数平均分子量1,250、軟化点101℃、
/テルペン系樹脂 :数平均分子量 800、軟化点100℃
▲6▼C5石油系樹脂 :数平均分子量1,100、軟化点 96℃、
/重合ロジンエステル樹脂:数平均分子量1,200、軟化点125℃
▲7▼重合ロジンエステル樹脂 :数平均分子量1,200、軟化点125℃
▲8▼低分子量ポリブテン(液状)
▲9▼ヒンダードフェノール
【0030】
【発明の効果】
以上のように、特定のジブロック量を持つSISブロックコポリマーと特定の粘着付与樹脂からなる本発明の粘着剤は、安全上問題の多い過酸化物等を含まず、すねり工程や高温での長時間加硫工程の必要がない粘着剤であり、ゴム等の成形品に対し従来のようなバフ研磨やプライマー等の処理を施さなくとも充分な接着強度を得ることができる。[0001]
BACKGROUND OF THE INVENTION
The present invention bonds molded products made of rubbers such as natural rubber, chloroprene rubber, EPT (ethylene-propylene-terpolymer) rubber, and thermoplastic elastomers such as olefin, styrene, vinyl chloride and urethane. The present invention relates to an adhesive and an adhesive sheet used for the purpose.
[0002]
[Prior art]
Rubber and thermoplastic elastomer molded products (hereinafter, molded products such as rubber) are widely used in various industrial products in addition to automobile members, home appliances, and OA equipment members. However, molded products such as rubber are generally mixed with various fillers, vulcanizing agents, oils, plasticizers, etc., or when molded products are vulcanized, they are easily removed from the press mold. In addition, since a release agent such as silicone oil adheres to the surface of the molded product, the adhesive strength to the molded product is low. Further, when a molded product such as rubber is attached to a curved surface with tapes, etc., there is a problem that the molded product is highly elastic and therefore easily peeled off due to poor adhesion.
[0003]
Therefore, until now, a method has been adopted in which the surface of a molded article such as rubber as an adherend is processed in the order of buffing, solvent washing, primer coating, and adhesive tape is pasted to the adherend. It was. However, since a primer and a solvent are used, the working environment is poor, the working process is complicated, and the adhesiveness varies due to variations in buffing.
[0004]
In order to solve these problems, Japanese Patent Application Laid-Open No. 5-78634 discloses a medium molecular weight liquid or semi-liquid rubber and a low molecular weight tackifier and / or softener for a high molecular weight rubbery polymer made of polyisobutylene or the like. In addition, it is disclosed that the pressure-sensitive adhesive and pressure-sensitive adhesive sheet having a gel fraction set to 10 to 40% exhibit a sufficient adhesive force even if the EPT rubber or the like is not subjected to treatment such as buffing. However, this pressure-sensitive adhesive sheet requires a vulcanization and aging at a high temperature for a long time after the slicking process and the pressure-sensitive adhesive are coated on the base material. In addition, since peroxide compounds and thiuram compounds are used, there are many problems in handling and safety.
[0005]
[Problems to be solved by the invention]
In view of the above circumstances, the problem of the present invention is that it is possible to omit a buffing process for a molded article such as rubber, which is an adherend, and there is a safety problem because a slipping process and a high-temperature vulcanization process for an adhesive are unnecessary. An object of the present invention is to provide a pressure-sensitive adhesive and pressure-sensitive adhesive sheets that can exhibit sufficient cohesive strength and adhesive strength without containing a peroxide or the like.
[0006]
[Means for Solving the Problems]
As a result of intensive studies, the present inventors have found that a pressure-sensitive adhesive composed of a SIS block copolymer having a specific diblock amount and a specific tackifying resin does not contain a peroxide or the like, which has many safety problems, and is a sludge process or a high temperature. It has been found that sufficient adhesion strength can be obtained without the need for vulcanization for a long period of time and without subjecting the adherend to buffing or the like, and the present invention has been completed.
[0007]
That is, the first configuration of the present invention is a pressure-sensitive adhesive containing 100 parts by weight of a SIS block copolymer and 60 to 200 parts by weight of a tackifier resin as essential components, and the amount of diblock in the SIS block copolymer is 30 to 80. The tackifying resin contains a C5 petroleum resin, and 10 to 30% by weight of the amount of the tackifying resin is a tackifying resin and / or a softening agent that is liquid at room temperature, It is an adhesive for bonding rubber and thermoplastic elastomer.
[0008]
Moreover, the structure of this invention is a rubber | gum and thermoplastic elastomer adhesive pressure-sensitive adhesive in which the above-mentioned tackifying resin further contains a terpene resin and / or a polymerized rosin ester resin.
[0009]
Furthermore, the second configuration of the present invention is a pressure-sensitive adhesive sheet for adhering rubber and thermoplastic elastomer, characterized in that the pressure-sensitive adhesive described above is provided on at least one surface of a support.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The SIS block copolymer used in the present invention is not particularly limited except that the diblock amount is 30 to 80% by weight. If the diblock amount is less than 30% by weight, sufficient adhesive strength cannot be obtained for molded products such as rubber. If it exceeds 80% by weight, the cohesive strength of the pressure-sensitive adhesive is remarkably reduced. The molecular weight of the SIS block copolymer is preferably in the range of 10,000 to 800,000, and more preferably in the range of 30,000 to 500,000. If it is less than 10,000, the cohesive force of the pressure-sensitive adhesive is remarkably reduced. On the other hand, if it exceeds 800,000, wetting with respect to a molded product such as rubber is reduced and sufficient adhesive strength cannot be obtained.
[0011]
The C5 petroleum-based resin used in the present invention is a resin obtained by polymerizing the residue obtained by extracting and separating isoprene and cyclopentadiene from a C5 fraction generally obtained by naphtha decomposition. ), Wing tack 95 (manufactured by Goodyear), quinton K100, R100, F100 (manufactured by Zeon Corporation), pico tack 95, picopale 100 (manufactured by Rika Hercules), and the like.
[0012]
Examples of tackifying resins other than C5 petroleum resins used in the present invention include terpene resins, rosin resins, terpene-phenol resins, styrene resins, coumarone-indene resins, xylene resins, phenol resins, and petroleum resins other than C5. (Aromatic, alicyclic, etc.). Preferably, polymerized rosin ester resin and terpene resin are used.
[0013]
When the total amount of tackifying resin used in the present invention is less than 60 parts by weight, the adhesive strength to a molded article such as rubber is lowered, and the adhesiveness after moisture resistance deterioration is also lowered. When the total amount exceeds 200 parts by weight, the heat resistant holding force deteriorates.
[0014]
Examples of the liquid tackifier resin and / or softener used in the present invention include the above-described tackifier resin that is liquid at room temperature, and low-molecular weight liquid rubber such as process oil, polyester plasticizer, and polybutene. The ratio of the liquid tackifying resin and / or the softening agent in the total amount of the tackifying resin is 10 to 30% by weight. If it is less than 10% by weight, the wettability to a molded article such as rubber is deteriorated and the adhesive strength is lowered. When it exceeds 30% by weight, the heat-resistant holding force is remarkably lowered.
[0015]
In the present invention, other polymer components and crosslinking agents can be used. Further, various additives generally used in pressure-sensitive adhesives, such as antioxidants, ultraviolet absorbers, fillers, pigments, thickeners, and the like, can be used as long as the adhesive strength is not lowered. The synthetic rubber-based pressure-sensitive adhesive of the present invention prepared in this manner is usually diluted with an organic solvent such as toluene and hexane, melted in a solution or at a high temperature, and used for bonding molded products such as rubber. Used as.
[0016]
This pressure-sensitive adhesive may be applied directly to the adherend, but generally it is provided on at least one side of the support and is used in the form of a tape or sheet, but a molded article such as rubber is adhered to the adherend. For this purpose, it is desirable to form a double-sided tape in which an adhesive is provided on both sides of the support. Usually, the pressure-sensitive adhesive is once provided on release paper (in the case of a solution, it is dried after coating) and is bonded to both surfaces of the support. Although it does not specifically limit as a support body, For example, plastic films, such as porous supports, such as a nonwoven fabric, cloth, paper, a polyester film, a polyethylene film, a polypropylene film, a polyvinyl chloride film, are mentioned. A thickness of about 5 to 200 μm is usually used. In order to improve the adhesion to the support, corona treatment or primer treatment may be performed.
[0017]
The thickness of the pressure-sensitive adhesive provided on the support is usually preferably about 10 to 400 μm, but is not limited thereto. Alternatively, a differential type double-sided tape specification in which a pressure-sensitive adhesive for moldings such as rubber is provided on one side of the support and a different pressure-sensitive adhesive such as an acrylic pressure-sensitive adhesive is provided on the other side may be used.
[0018]
【Example】
Although the Example of this invention is described concretely below, it is not limited to this.
[0019]
SIS block copolymer, tackifying resin, liquid tackifying resin / softener and antioxidant were blended in the weight ratios listed in Table 1 and dissolved in toluene to prepare a pressure-sensitive adhesive solution. This solution was applied on a separator using an applicator so that the thickness after drying was 60 μm, and dried at 80 ° C. for 3 minutes. Next, after preparing two layers of the pressure-sensitive adhesive formed on the separator and bonding them to both sides of a nonwoven fabric having a thickness of 50 μm, laminating is performed at 90 ° C. and a pressure of 4 kgf / cm 2. A double-sided PSA sheet was prepared.
[0020]
As comparative examples, a SIS block copolymer, a tackifier resin, a liquid tackifier resin / softener and an antioxidant were blended in the weight ratios listed in Table 2, and an adhesive solution and a double-sided adhesive sheet were prepared in the same manner as in the examples.
[0021]
The double-sided adhesive sheets obtained in Examples 1 to 4 and Comparative Examples 1 to 5 were evaluated for adhesive strength, heat resistance retention, moisture deterioration resistance and resilience resistance. The evaluation results are shown in Tables 1 and 2 below. The evaluation was performed as follows.
[0022]
<Adhesive strength>: A double-sided PSA sheet was affixed to EPT (ethylene-propylene-terpolymer) rubber and chloroprene rubber with a pressure of 2 kg × 1 reciprocating, and 30 minutes later, 180 ° peel adhesion at a tensile speed of 300 mm / min. The force was measured.
[0023]
<Heat resistant holding force>: A double-sided PSA sheet was pasted on a steel sheet specified in JIS-Z0237 at a pasting area of 20 mm width × 20 mm, and the drop time when a load of 500 g was applied at 70 ° C. was measured.
[0024]
<Humidity resistance>: A double-sided pressure-sensitive adhesive sheet was applied to EPT rubber under a reciprocating pressure of 2 kg × 1 and evaluated for a decrease in adhesive strength after standing for 7 days in an environment of 50 ° C. and 95% RH.
◎: No decrease in adhesion after moisture resistance deterioration ○: No significant decrease in adhesion (80% or more of initial value)
X: Adhesive strength significantly decreased (50% or less of initial value)
[0025]
<Repulsion resistance>: EPT rubber with a width of 20 mm is attached to an aluminum plate bent at 90 ° with a double-sided adhesive sheet so that the edge is 10 mm long, and the environment is 50 ° C. and 95% RH. The peeled state after standing for 7 days was evaluated.
◎: No peeling ○: Floating ×: Full peeling
In the above evaluation, the adherent EPT rubber and chloroprene rubber were 1 mm in thickness and 60 ° in hardness (manufactured by Kuraray). The blending and evaluation results are shown in Tables 1 and 2 below.
[0027]
[Table 1]
Figure 0003994510
[0028]
[Table 2]
Figure 0003994510
[0029]
In Tables 1 and 2, (1) to (9) are as follows.
(1) Weight average molecular weight 200,000, styrene content 14% by weight.
(2) Weight average molecular weight 170,000, styrene content 16% by weight
(3) Weight average molecular weight 170,000, styrene content 15% by weight
(4) C5 petroleum resin: number average molecular weight 885, softening point 100 ° C.
(5) C5 petroleum resin: number average molecular weight 1,250, softening point 101 ° C.
/ Terpene resin: Number average molecular weight 800, softening point 100 ° C.
(6) C5 petroleum resin: number average molecular weight 1,100, softening point 96 ° C.
/ Polymerized rosin ester resin: number average molecular weight 1,200, softening point 125 ° C.
(7) Polymerized rosin ester resin: number average molecular weight 1,200, softening point 125 ° C.
(8) Low molecular weight polybutene (liquid)
▲ 9 ▼ hindered phenol [0030]
【The invention's effect】
As described above, the pressure-sensitive adhesive of the present invention comprising a SIS block copolymer having a specific diblock amount and a specific tackifying resin does not contain peroxides or the like that are often problematic in terms of safety, and can be used in a sludge process or at a high temperature. It is a pressure-sensitive adhesive that does not require a vulcanization process for a long time, and a sufficient adhesive strength can be obtained without subjecting a molded article such as rubber to conventional buffing or primer treatment.

Claims (2)

SISブロックコポリマー100重量部と、粘着付与樹脂60〜200重量部を必須成分として含有する粘着剤において、該SISブロックコポリマー中のジブロック量が30〜80重量%であり、該粘着付与樹脂がC5石油系樹脂及び重合ロジンエステル系樹脂を含み、且つ、粘着付与樹脂量の10〜30重量%が常温で液状の粘着付与樹脂及び/又は軟化剤であることを特徴とする、ゴム、熱可塑性エラストマー接着用粘着剤。In a pressure-sensitive adhesive containing 100 parts by weight of a SIS block copolymer and 60 to 200 parts by weight of a tackifying resin as essential components, the diblock amount in the SIS block copolymer is 30 to 80% by weight, and the tackifying resin is C5 A rubber or thermoplastic elastomer comprising a petroleum resin and a polymerized rosin ester resin , wherein 10 to 30% by weight of the amount of the tackifying resin is a tackifying resin and / or a softening agent which is liquid at normal temperature Adhesive for bonding. 支持体の少なくとも片面に請求項に記載の粘着剤が設けられていることを特徴とするゴム、熱可塑性エラストマー接着用粘着シート。A pressure-sensitive adhesive sheet for adhering rubber and thermoplastic elastomer, wherein the pressure-sensitive adhesive according to claim 1 is provided on at least one surface of a support.
JP07182498A 1998-03-20 1998-03-20 Adhesive composition for adhesive bonding of rubber and thermoplastic elastomer and adhesive sheet Expired - Lifetime JP3994510B2 (en)

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CN109306252B (en) * 2017-07-28 2021-05-07 安徽屹珹新材料科技有限公司 Adhesive layer for adhesive tape and preparation method and application thereof
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