JPH0543855A - Releasable self-adhesive composition - Google Patents

Releasable self-adhesive composition

Info

Publication number
JPH0543855A
JPH0543855A JP22876591A JP22876591A JPH0543855A JP H0543855 A JPH0543855 A JP H0543855A JP 22876591 A JP22876591 A JP 22876591A JP 22876591 A JP22876591 A JP 22876591A JP H0543855 A JPH0543855 A JP H0543855A
Authority
JP
Japan
Prior art keywords
weight
adhesive
adhesive composition
sensitive adhesive
pressure
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
JP22876591A
Other languages
Japanese (ja)
Inventor
Mamoru Akiyama
山 護 秋
Kiyohisa Ashizawa
澤 清 久 芦
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.)
MODERN PLAST KOGYO KK
Nippon Synthetic Chemical Industry Co Ltd
Original Assignee
MODERN PLAST KOGYO KK
Nippon Synthetic Chemical Industry 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 MODERN PLAST KOGYO KK, Nippon Synthetic Chemical Industry Co Ltd filed Critical MODERN PLAST KOGYO KK
Priority to JP22876591A priority Critical patent/JPH0543855A/en
Publication of JPH0543855A publication Critical patent/JPH0543855A/en
Pending legal-status Critical Current

Links

Landscapes

  • Adhesives Or Adhesive Processes (AREA)

Abstract

PURPOSE:To provide a self-adhesive compsn. excellent in releasability. CONSTITUTION:A releasable self-adhesive compsn. which comprises an epoxidized acrylic copolymer, an acrylic resin having at least one kind of group selected from the group consisting of carboxyl, amino, and amino groups, and a cure catalyst. The adhesive exhibits little increase in adhesive strength with time after sticking, leaves no residue even when released after left stuck for a long time, has a sticking power hardly influenced by the state of an adherend surface, and therefore is very useful industrially.

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、剥離性の良好な粘着剤
組成物に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive composition having good releasability.

【0002】[0002]

【従来の技術】一般にステンレスやアルミニウムなどの
金属板、アクリル板やスチレン板等のプラスチック板、
木板、化粧板等は、輸送、保管、加工時に表面の傷や変
色等を防ぐために、粘着シート、粘着フィルム、粘着テ
ープ等の表面保護材を貼り付け、上記の目的を果たした
後に剥ぎ取られる。しかし、長期間これらの表面保護材
を貼り合わせたままにしておくと、被着体への粘着力が
経時的に増大し、剥ぎ取った後被着体表面に粘着剤が残
存する、いわゆる糊残りという現象がみられ、被着体の
美観を著しく損なうので、従来種々の改良が試みられて
きた。
2. Description of the Related Art Generally, metal plates such as stainless steel and aluminum, plastic plates such as acrylic plate and styrene plate,
Wooden boards, decorative boards, etc. are peeled off after the surface protection material such as an adhesive sheet, an adhesive film or an adhesive tape is attached to prevent scratches or discoloration on the surface during transportation, storage or processing, and after achieving the above purpose. .. However, if these surface protective materials are left stuck to each other for a long period of time, the adhesive force to the adherend increases with time, and the adhesive remains on the surface of the adherend after peeling, so-called glue. Since the phenomenon of the remaining is observed and the aesthetics of the adherend is remarkably impaired, various improvements have hitherto been attempted.

【0003】例えば特開昭61−47772号公報には
粘着樹脂の組成を考慮する方法や、特開昭59−580
72号公報、特開昭61−108685号公報等には、
粘着剤に界面活性剤を添加する方法、更には特開昭60
−197780号公報にはアクリル系感圧接着剤にシリ
コーン感圧接着剤を混合すること等が提案されている。
For example, JP-A-61-47772 discloses a method of considering the composition of an adhesive resin, and JP-A-59-580.
No. 72, JP-A-61-108685, etc.
A method of adding a surfactant to the pressure-sensitive adhesive, and further, JP-A-60
No. 1977780 proposes mixing an acrylic pressure-sensitive adhesive with a silicone pressure-sensitive adhesive.

【0004】[0004]

【発明が解決しようとする課題】しかし、従来の方法で
は、主として粘着力の経時安定性を良くすると凝集力が
低下する現象がみられ、糊残りを防ぎきることは困難で
あり、更に被着体の表面が粗面、曲面、球面等の複雑な
状態であると粘着力が低下するので、被着体により粘着
剤を変更する必要が生じたりする等、種々の問題を有
し、更なる改善が望まれているのが実情である。
However, in the conventional method, there is a phenomenon in which cohesive force is lowered mainly when the stability of the adhesive force with time is improved, and it is difficult to completely prevent the adhesive residue, and further, it is difficult to adhere. If the surface of the body is in a complicated state such as a rough surface, a curved surface, or a spherical surface, the adhesive strength will decrease, so there are various problems such as the need to change the adhesive depending on the adherend. The reality is that improvement is desired.

【0005】[0005]

【発明が解決するための手段】そこで本発明者らは、上
述の問題点を解決するため鋭意研究を行った結果、共重
合成分として特定の官能基をもつアクリル系共重合体を
2種組合せた粘着剤組成物がその目的を達成し得ること
を見出し、本発明を完成するに至った。即ち、本発明
は、「(A)エポキシ基を含有するアクリル系共重合
体、(B)カルボキシル基、アミド基、アミノ基の少なく
とも一種を含有するアクリル系共重合体及び(C)硬化触
媒からなる剥離性粘着剤組成物。」である。
Therefore, as a result of intensive studies to solve the above-mentioned problems, the present inventors have combined two kinds of acrylic copolymers having a specific functional group as a copolymerization component. The present inventors have found that the pressure-sensitive adhesive composition can achieve the object, and completed the present invention. That is, the present invention comprises: (A) an acrylic copolymer containing an epoxy group, (B) an acrylic copolymer containing at least one of a carboxyl group, an amide group and an amino group, and (C) a curing catalyst. A peelable pressure-sensitive adhesive composition.

【0006】本発明の剥離性粘着剤の特徴点は、上述の
如くアクリル系共重合体の成分として、官能基の異なる
2種のアクリル系共重合体を使用する点にある。このこ
とにより粘着力の経時増加が妨げられ、かつ長期間粘着
放置された後剥離しても糊残りがみられない等、剥離性
に優れ、更に粗面、曲面接着力も向上し、つまり柔軟性
にとみ、被着体の面の状態による影響を受けにくいアク
リル系剥離性粘着剤組成物が得られる。エポキシ基、カ
ルボキシル基、アミド基、アミノ基を1つのアクリル系
樹脂に導入することは反応時にゲル化等がおこり易く実
用的に不可能である。
A feature of the peelable pressure-sensitive adhesive of the present invention is that two kinds of acrylic copolymers having different functional groups are used as components of the acrylic copolymer as described above. This prevents the adhesive strength from increasing over time, has no adhesive residue even after peeling after being left for a long time, and has excellent releasability, and also improves the rough surface and curved surface adhesive strength. It is possible to obtain an acrylic releasable pressure-sensitive adhesive composition that is hardly affected by the state of the surface of the adherend due to its excellent properties. It is practically impossible to introduce an epoxy group, a carboxyl group, an amide group, and an amino group into one acrylic resin because gelation or the like is likely to occur during the reaction.

【0007】まず本発明で使用する(A)のアクリル系共
重合体はエポキシ基をもつ単量体、例えばグリシジルア
クリレート、グリシジルメタクリレート、アリルグリシ
ジルエーテル等とアクリル酸アルキルエステルとを共重
合させて得られる。エポキシ基の含有量は0.5〜15
重量%、好ましくは1.0〜10重量%が有利である。
0.5重量%以下では架橋反応が不充分となり、15重
量%以上ではタックの低下が大きくなっていずれも実用
上問題となる。又ガラス転移温度が−20℃以下重量平
均分子量が30万以上のものが好適に使用される。共重
合させられるアクリル酸アルキルエステルとしてはアク
リル酸又はメタクリル酸のメチルエステル、エチルエス
テル、プロピルエステル、イソプロピルエステル、ブチ
ルエステル、ペンチルエステル、ヘキシルエステル、ヘ
プチルエステル、オクチルエステル、2−エチルヘキシ
ルエステル等が例示される。
First, the acrylic copolymer (A) used in the present invention is obtained by copolymerizing a monomer having an epoxy group, such as glycidyl acrylate, glycidyl methacrylate, allyl glycidyl ether, etc., with an alkyl acrylate. Be done. Epoxy group content is 0.5-15
%, Preferably 1.0 to 10% by weight is advantageous.
If it is less than 0.5% by weight, the crosslinking reaction will be insufficient, and if it is more than 15% by weight, the decrease in tack will be large, which is a practical problem. Further, those having a glass transition temperature of -20 ° C or lower and a weight average molecular weight of 300,000 or higher are preferably used. Examples of acrylic acid alkyl ester to be copolymerized include acrylic acid or methacrylic acid methyl ester, ethyl ester, propyl ester, isopropyl ester, butyl ester, pentyl ester, hexyl ester, heptyl ester, octyl ester, and 2-ethylhexyl ester. To be done.

【0008】一方、(B)のアクリル系共重合体はカル
ボキシル基含有単量体、アミド基含有単量体、アミノ基
含有単量体の少なくとも1種とアクリル酸アルキルエス
テルとを共重合させることによって製造される。カルボ
キシル基含有単量体としてはアクリル酸、メタクリル
酸、クロトン酸等のモノカルボン酸、マレイン酸、フマ
ール酸、シトラコン酸、グルタコン酸、イタコン酸等の
多価カルボン酸及びこれらの無水物が示される。アミド
基含有単量体としてはアクリルアミド、メタクリルアミ
ド、N−メチロールアクリルアミドかつアミノ基含有単
量体としてはアクリル酸ジメチルアミノエチル、メタク
リル酸ジメチルアミノエチル、アクリル酸ジエチルアミ
ノエチル、メタクリル酸ジエチルアミノエチル等が代表
的である。
On the other hand, the acrylic copolymer (B) is obtained by copolymerizing at least one of a carboxyl group-containing monomer, an amide group-containing monomer and an amino group-containing monomer with an acrylic acid alkyl ester. Manufactured by. Examples of the carboxyl group-containing monomer include monocarboxylic acids such as acrylic acid, methacrylic acid and crotonic acid, polycarboxylic acids such as maleic acid, fumaric acid, citraconic acid, glutaconic acid and itaconic acid, and anhydrides thereof. .. Typical examples of the amide group-containing monomer are acrylamide, methacrylamide, and N-methylol acrylamide, and typical examples of the amino group-containing monomer are dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl acrylate, diethylaminoethyl methacrylate, and the like. Target.

【0009】これらの官能基の含有量は0.5〜15重
量%、好ましくは1.0〜10重量%である。0.5重量
%以下では架橋が不充分となり、15重量%以上ではタ
ックの低下が大きくなって実用性に乏しい。又(B)の
うちでガラス転移温度が−20℃以下、数平均分子量が
30万以上のものが実用的である。 (A)、(B)の共重合体においては前記した単量体以
外に必要に応じて、これらと共重合可能なビニル系単量
体、例えば2−ヒドロキシエチル(メタ)アクリレー
ト、2−ヒドロキシプロピル(メタ)アクリレート、3
−クロロ−2−ヒドロキシプロピル(メタ)アクリレー
ト、ジエチレングリコールモノ(メタ)アクリレート、
スチレン、酢酸ビニル、(メタ)アクリロニトリル等が
併用され得る。
The content of these functional groups is 0.5 to 15% by weight, preferably 1.0 to 10% by weight. If it is less than 0.5% by weight, crosslinking will be insufficient, and if it is more than 15% by weight, the tack will be greatly reduced and the practicality will be poor. Further, among (B), those having a glass transition temperature of −20 ° C. or lower and a number average molecular weight of 300,000 or more are practical. In the copolymers of (A) and (B), other than the above-mentioned monomers, vinyl monomers copolymerizable with them, such as 2-hydroxyethyl (meth) acrylate and 2-hydroxy, may be used, if necessary. Propyl (meth) acrylate, 3
-Chloro-2-hydroxypropyl (meth) acrylate, diethylene glycol mono (meth) acrylate,
Styrene, vinyl acetate, (meth) acrylonitrile, etc. may be used in combination.

【0010】本発明中のアクリル系共重合体は、適当な
溶媒に、前述の様な単量体を溶解し、重合開始剤を加え
て昇温し、反応させるか、場合によっては反応熱除去の
ためにこれらのモノマー又は重合開始剤を滴下仕込みす
る等して反応させる。重合形式としては溶液重合、乳化
重合、懸濁重合等の任意の方法が実施可能であるが、溶
液重合、乳化重合が実用的である。
The acrylic copolymer in the present invention is prepared by dissolving the above-mentioned monomer in a suitable solvent, adding a polymerization initiator and heating the mixture to cause a reaction, or in some cases, removing reaction heat. For this purpose, these monomers or polymerization initiators are added dropwise and reacted. As the polymerization method, any method such as solution polymerization, emulsion polymerization and suspension polymerization can be carried out, but solution polymerization and emulsion polymerization are practical.

【0011】溶液重合にあたって溶媒としては、一般に
酢酸メチル、酢酸エチル等のエステル類、ベンゼン、ト
ルエン、キシレン等の芳香族炭化水素、シクロヘキサン
等の脂環族炭化水素、及びアセトン、メチルエチルケト
ン等のケトン類等が単独又は混合して使用されるが、こ
れらに限定されない。溶媒の決定には、溶媒の沸点、得
られた共重合体の溶解性や分子量、更に作業性などを考
慮に入れることが必要で、例えば、酢酸エチルや酢酸エ
チルとトルエンの混合溶媒等が特に好ましい。乳化重合
にあたっては、乳化剤としてグリセリンモノステアレー
ト、ポリオキシエチレンフェニルエーテル、ラウリル硫
酸ソーダ等が使用できる。
Solvents for solution polymerization are generally esters such as methyl acetate and ethyl acetate, aromatic hydrocarbons such as benzene, toluene and xylene, alicyclic hydrocarbons such as cyclohexane, and ketones such as acetone and methyl ethyl ketone. Etc. are used alone or as a mixture, but are not limited thereto. To determine the solvent, it is necessary to take into consideration the boiling point of the solvent, the solubility and molecular weight of the obtained copolymer, and further workability.For example, ethyl acetate or a mixed solvent of ethyl acetate and toluene is particularly preferable. preferable. In emulsion polymerization, glycerin monostearate, polyoxyethylene phenyl ether, sodium lauryl sulfate, etc. can be used as an emulsifier.

【0012】又、重合開始剤としては、ベンゾイルパー
オキサイド、ラウリルパーオキサイド等の各種過酸化
物、アゾビスイソブチロニトリル等のアゾ化合物等の公
知の重合開始剤が単独又は併用して使用される。これら
は通常、モノマー100重量部に対して0.01−0.5
重量部の割合で使用される。
As the polymerization initiator, known polymerization initiators such as various peroxides such as benzoyl peroxide and lauryl peroxide, and azo compounds such as azobisisobutyronitrile are used alone or in combination. It These are usually 0.01-0.5 per 100 parts by weight of monomer.
Used in parts by weight.

【0013】粘着剤組成物において(A)と(B)との
混合割合は重量基準で(A)/(B)=10/90〜9
0/10、好ましくは20/80〜80/20が実用的
である。混合割合が10/90以下及び90/10以上
では架橋が不充分となり支障となる。粘着剤組成物には
(C)硬化触媒の添加が必須である。かかる触媒の作用
により(A)と(B)との官能基の架橋反応が円滑に進
行し、実用性のある粘着物性が発揮される。代表的な触
媒はベンジルジメチルアミン、トリスジメチルアミノメ
チルフェノール、トリエチレンジアミン、トリブチルア
ミン等の第3級アミン、トリエチルベンジルアンモニウ
ムクロライド、テトラメチルアンモニウムクロライド等
の第4級アミン、2−メチルイミダゾール、2−エチル
−4−メチルイミダゾール、2−フェニルイミダゾール
等のイミダゾール類、及びトリフェニルフォスフィン、
トリフェニルアンチモン、酢酸亜鉛等の有機酸の金属化
合物が挙げられる。 (C)の配合量は(A)と(B)との合計量に対して
0.2〜3重量%が好ましい。
In the adhesive composition, the mixing ratio of (A) and (B) is (A) / (B) = 10/90 to 9 on a weight basis.
0/10, preferably 20/80 to 80/20 is practical. If the mixing ratio is 10/90 or less and 90/10 or more, the crosslinking becomes insufficient, which is an obstacle. It is essential to add the curing catalyst (C) to the pressure-sensitive adhesive composition. By the action of such a catalyst, the crosslinking reaction of the functional groups of (A) and (B) proceeds smoothly, and a practical adhesive property is exhibited. Typical catalysts are tertiary amines such as benzyldimethylamine, trisdimethylaminomethylphenol, triethylenediamine and tributylamine, quaternary amines such as triethylbenzylammonium chloride and tetramethylammonium chloride, 2-methylimidazole, 2- Imidazoles such as ethyl-4-methylimidazole and 2-phenylimidazole, and triphenylphosphine,
Examples thereof include metal compounds of organic acids such as triphenyl antimony and zinc acetate. The compounding amount of (C) is preferably 0.2 to 3% by weight based on the total amount of (A) and (B).

【0014】本発明の粘着剤組成物は、各種の粘着加工
品に使用しても充分な粘着力、保持力、タックを示すも
のであるが、特に表面保護粘着テープ等の剥離性を必要
とする製品への使用に適し、極めて実用性の高いもので
ある。本発明の粘着剤組成物は、他にロジン、ロジンエ
ステル、水添ロジンエステル、フェノール樹脂、芳香族
変性テルペン樹脂、脂肪族系石油樹脂、脂環族系石油樹
脂、スチレン系樹脂、キシレン系樹脂等の粘着付与剤、
フタル酸系、リン酸エステル、アジピン酸エステル、セ
バチン酸エステル、リシノール酸エステル、ポリエステ
ル型、エポキシ系、塩化パラフィン等の可塑剤、動・植
物油、鉱物油、シリコーン油などの油脂類、酸化チタ
ン、亜鉛華、炭酸カルシウム等の着色剤、ベンゾフェノ
ン系、サルチレート系、ベンゾトリアゾール系、置換ア
クリロニトリル系等の紫外線防止剤、亜ヒ酸、亜酸化
銅、酸化水銀など無機化合物と有機水銀化合物、有機硫
黄化合物、フェノール系化合物、有機銅系化合物など有
機化合物の防カビ剤、シリコーンエマルジョン、アルコ
ール類等の消泡剤、ポリビニルアルコール、ポリアクリ
ル酸ソーダ、カルボキシメチルセルロース、メチルセル
ロース等の増粘剤等、公知の添加剤が添加できる。
The pressure-sensitive adhesive composition of the present invention exhibits sufficient pressure-sensitive adhesive force, holding power and tack even when used in various types of pressure-sensitive adhesive products, but particularly requires releasability of a surface protective pressure-sensitive adhesive tape or the like. It is suitable for use in products that meet the requirements and is extremely practical. The pressure-sensitive adhesive composition of the present invention also includes rosin, rosin ester, hydrogenated rosin ester, phenol resin, aromatic modified terpene resin, aliphatic petroleum resin, alicyclic petroleum resin, styrene resin, xylene resin. Tackifier such as
Phthalic acid type, phosphoric acid ester, adipic acid ester, sebacic acid ester, ricinoleic acid ester, polyester type, epoxy type, plasticizers such as chlorinated paraffin, oils and fats such as animal / vegetable oils, mineral oils and silicone oils, titanium oxide, Coloring agents such as zinc white, calcium carbonate, benzophenone-based, salicylate-based, benzotriazole-based, and acrylonitrile-based UV protection agents, arsenous acid, cuprous oxide, mercury oxide and other inorganic compounds and organic mercury compounds, organic sulfur compounds Known additives such as antifungal agents for organic compounds such as phenolic compounds and organic copper compounds, antifoaming agents for silicone emulsions, alcohols, thickeners for polyvinyl alcohol, sodium polyacrylate, carboxymethyl cellulose, methyl cellulose, etc. Agents can be added.

【0015】本発明の粘着剤組成物は基材に塗布するこ
とによって製品化されるが、塗布方法としては、該組成
物を有機溶剤、例えばトルエン、酢酸エチル、メチルセ
ロソルブ、エチルセルソルブ等の単独又は混合液に樹脂
固形分として10〜50重量%程度溶解した溶液を基材
上にドクターブレード、ロールコート、刷毛塗り等によ
って塗布し、乾燥後の膜厚が5〜50μ程度となるよう
に調節する。乾燥は常温、加温のいずれで行っても良
い。又、他の塗布方法としては、溶液を離型紙上に同様
の方法で塗工し、乾燥し、その後、対象基材に転写塗工
し粘着シートを得る方法等がある。
The pressure-sensitive adhesive composition of the present invention is made into a product by coating it on a substrate. As a coating method, an organic solvent such as toluene, ethyl acetate, methyl cellosolve or ethyl cellosolve is used. A solution in which about 10 to 50% by weight as a resin solid content is dissolved alone or in a mixed solution is applied on a substrate by doctor blade, roll coating, brush coating, etc. so that the film thickness after drying is about 5 to 50 μm. Adjust. Drying may be carried out at room temperature or heating. Further, as another coating method, there is a method in which a solution is coated on a release paper in the same manner, dried, and then transfer-coated on a target substrate to obtain an adhesive sheet.

【0016】本発明の粘着剤組成物を塗布する基材とし
ては特に制限はなく、例えばポリエチレン、ポリプロピ
レン、ポリエステル(ポリエチレンテレフタレート)、
軟質ポリ塩化ビニル、アクリルートアセチルセルロース
等の各種プラスック、若しくは紙、布、金属箔あるいは
これらを材料とする複合成形物が挙げられる。これらの
基材の形状はフイルム、シート状等、必ずしも均一な形
態をしている必要はなく、発泡体や織布、不織布等の任
意のものであって良い。得られる粘着シートを貼り付け
る対象被着体は特に限定されないが、ステンレス板、ア
ルミニウム板、鋼板、銅板等をはじめとするあらゆる材
質の金属板、メラミン板、フェノール板等の合成樹脂化
粧板、合板、単板、ガラス板などのいわゆる板状物の
他、棒状物、陶器や各種成形物の表面に貼り付けること
ができる。
The substrate to which the pressure-sensitive adhesive composition of the present invention is applied is not particularly limited, and examples thereof include polyethylene, polypropylene, polyester (polyethylene terephthalate),
Examples include various plastics such as soft polyvinyl chloride and acrylate acetyl cellulose, paper, cloth, metal foil, or composite molded products made of these materials. The shape of these base materials does not necessarily have to be a uniform shape such as a film or a sheet shape, and may be any shape such as foam, woven cloth or nonwoven cloth. The target adherend to which the obtained adhesive sheet is attached is not particularly limited, but is a metal plate of any material such as a stainless plate, an aluminum plate, a steel plate, and a copper plate, a synthetic resin decorative plate such as a melamine plate, a phenol plate, and a plywood plate. In addition to so-called plate-shaped products such as a single plate and a glass plate, it can be attached to the surface of rod-shaped products, pottery and various molded products.

【0017】[0017]

【作 用】本発明のアクリル系剥離性粘着剤組成物は、
異なった官能基をもつ2種のアクリル系共重合体の混合
物の架橋体であり、低分子量物が含まれないために、貼
付け後の粘着力の経時上昇が少なくなり、長期間粘着放
置された後剥離しても糊残りが見られず、更に柔軟性に
すぐれるため粗面、曲面への接着力が向上する等の長所
を有する。
[Working] The acrylic releasable pressure-sensitive adhesive composition of the present invention comprises
It is a cross-linked product of a mixture of two acrylic copolymers with different functional groups, and since it does not contain low molecular weight substances, the increase in the adhesive strength with time after application is small, and the adhesive was left for a long time. No adhesive residue is observed even after peeling off, and since it has excellent flexibility, it has advantages such as improved adhesion to rough surfaces and curved surfaces.

【0018】[0018]

【実施例】以下、実施例を挙げて本発明を更に具体的に
説明する。 実施例1 撹拌機付フラスコに、酢酸エチルを60重量部、トルエ
ンを12重量部、重合開始剤としてアゾビスイソブチロ
ニトリル(AIBN)0.05重量部、2−エチルヘキ
シルアクリレート84重量部、酢酸ビニル10重量部、
及びグリシジルメタクリレート6重量部を仕込み、撹拌
しながら昇温し、86℃にて反応した。更にトルエン溶
剤10重量部に溶解したAIBN0.07重量部を3時
間目及び5時間目に仕込んで、沸点にて7時間反応を行
い共重合体を得た。
EXAMPLES The present invention will be described in more detail below with reference to examples. Example 1 In a flask equipped with a stirrer, 60 parts by weight of ethyl acetate, 12 parts by weight of toluene, 0.05 part by weight of azobisisobutyronitrile (AIBN) as a polymerization initiator, 84 parts by weight of 2-ethylhexyl acrylate, acetic acid 10 parts by weight of vinyl,
And 6 parts by weight of glycidyl methacrylate were charged, the temperature was raised with stirring, and the reaction was carried out at 86 ° C. Further, 0.07 parts by weight of AIBN dissolved in 10 parts by weight of a toluene solvent was charged at the 3rd hour and the 5th hour and reacted at the boiling point for 7 hours to obtain a copolymer.

【0019】希釈剤としてトルエンを加えて樹脂分40
重量%、粘度5000cps/25℃の樹脂溶液を得
た。重合率は98%で、得られた共重合体の組成は2−
エチルヘキシルアクリレート84重量%、酢酸ビニル1
0重量%、グリシジルメタクリレート6重量%、ガラス
転移温度−61℃、重量平均分子量30万であった。
Toluene was added as a diluent to obtain a resin content of 40
A resin solution having a weight% and a viscosity of 5000 cps / 25 ° C. was obtained. The polymerization rate was 98%, and the composition of the obtained copolymer was 2-
Ethylhexyl acrylate 84% by weight, vinyl acetate 1
It was 0% by weight, glycidyl methacrylate 6% by weight, glass transition temperature -61 ° C, and weight average molecular weight 300,000.

【0020】同様の方法により2−エチルヘキシルアク
リレート87重量%、酢酸ビニル10重量%、アクリル
酸3重量%の組成の共重合体(B)を得た。(B)のガ
ラス転移温度は−60℃、重量平均分子量は75万であ
った。次に共重合体(A)50重量部、(B)50重量
部(いずれも固形分40重量%のトルエン溶液)と触媒
としてトリフェニルフォスフィンを混和して、粘着剤組
成物を製造した。
By the same method, a copolymer (B) having a composition of 87% by weight of 2-ethylhexyl acrylate, 10% by weight of vinyl acetate and 3% by weight of acrylic acid was obtained. The glass transition temperature of (B) was −60 ° C., and the weight average molecular weight was 750,000. Next, 50 parts by weight of the copolymer (A) and 50 parts by weight of (B) (each of which was a toluene solution having a solid content of 40% by weight) were mixed with triphenylphosphine as a catalyst to produce a pressure-sensitive adhesive composition.

【0021】実施例2〜7、対照例1〜3 実施例1に準じて粘着剤組成物を製造した。これらをま
とめて表1に示す。
Examples 2 to 7 and Controls 1 to 3 According to Example 1, pressure sensitive adhesive compositions were produced. These are summarized in Table 1.

【表1】 略語の説明 Tg:ガラス転移温度(℃) MW:重量平均分子量(万) 2−EHA:2−エチルヘキシルアクリレート VAc:酢酸ビニル GMA:グリシジルメタクリレート AAc:アクリル酸 AAM:アクリルアミド DE:アクリル酸ジエチルアミノエチル[Table 1] Explanation of abbreviations Tg: glass transition temperature (° C) MW: weight average molecular weight (10,000) 2-EHA: 2-ethylhexyl acrylate VAc: vinyl acetate GMA: glycidyl methacrylate AAc: acrylic acid AAM: acrylamide DE: diethylaminoethyl acrylate

【0022】得られた粘着剤組成物を厚さ50μmのポ
リエステルフイルム上に転写法にて乾燥(110〜12
0℃、2分間)塗布厚が23μmになるようにテープを
作成した。得られたテープを23℃×5日間熟成し、各
種粘着物性を測定した。試験方法は以下の通りである。 粘着力:JIS Z0237に準じてSUS−304に
テープを25mm幅で貼り合せ、20分後及び20時間後
の180℃剥離強度を測定した。引っ張り速度は300
mm/minとした。又60℃×7日間貼付け放置した後で
剥離を行い剥離強度測定と被着体表面を目視観察した。 保持力:JIS Z0237に準じてSUS−304に
テープを25×25mmで貼り合せ、80℃及び120℃
の恒温槽内に放置した状態で1キロの荷重をかけ、1時
間後のテープのずれ(もしくは落下時間)を測定した。 粘着性:J.DOW法に準じて測定し(23℃)、χ/
32インチで表示した。この結果を表2に示す。
The pressure-sensitive adhesive composition thus obtained was dried (110 to 12) on a polyester film having a thickness of 50 μm by a transfer method.
A tape was prepared so that the coating thickness was 23 μm (0 ° C., 2 minutes). The obtained tape was aged at 23 ° C. for 5 days, and various adhesive physical properties were measured. The test method is as follows. Adhesiveness: A tape was adhered to SUS-304 with a width of 25 mm according to JIS Z0237, and the peeling strength at 180 ° C. was measured after 20 minutes and 20 hours. Pulling speed is 300
mm / min. Further, after being left at 60 ° C. for 7 days, it was peeled off, and peeling strength was measured and the surface of the adherend was visually observed. Holding power: According to JIS Z0237, tape is attached to SUS-304 with 25 × 25 mm, 80 ° C. and 120 ° C.
A load of 1 kg was applied in a state where the tape was left in the constant temperature bath, and the shift (or drop time) of the tape after 1 hour was measured. Adhesiveness: J. Measured according to the DOW method (23 ° C), χ /
Displayed at 32 inches. The results are shown in Table 2.

【0023】[0023]

【表2】 [Table 2]

【0024】[0024]

【発明の効果】本発明の粘着剤組成物は、長期間粘着し
て放置された後粘着力の上昇が抑制されることもさるこ
とながら、剥離しても糊残りがみられない点や、被着体
の表面状態によって影響を受けにくいので被着体の種類
により粘着剤を変更しなくてよい点等で、表面保護粘着
テープ等の剥離性を必要とする製品への使用に適し、産
業上極めて有用である。
EFFECTS OF THE INVENTION The pressure-sensitive adhesive composition of the present invention suppresses an increase in adhesive strength after being left adhered for a long period of time and, at the same time, has no adhesive residue even after peeling. It is not affected by the surface condition of the adherend, so it is not necessary to change the adhesive depending on the type of adherend.It is suitable for use in products requiring peelability such as surface protection adhesive tape, Above all very useful.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】(A)エポキシ基を含有するアクリル系共
重合体、(B)カルボキシル基、アミド基、アミノ基の
少なくとも一種を含有するアクリル系共重合体及び
(C)硬化触媒からなる剥離性粘着剤組成物。
1. A peeling comprising (A) an acrylic copolymer containing an epoxy group, (B) an acrylic copolymer containing at least one of a carboxyl group, an amide group and an amino group, and (C) a curing catalyst. Adhesive composition.
【請求項2】(A)/(B)が重量基準で10/90〜
90/10であり、かつ(A)+(B)に対する(C)
の割合が重量基準で0.2〜3%である請求項1記載の
粘着剤組成物。
2. (A) / (B) is from 10/90 by weight.
90/10 and (C) with respect to (A) + (B)
The pressure-sensitive adhesive composition according to claim 1, wherein the ratio is 0.2 to 3% by weight.
【請求項3】(A)としてエポキシ基の含有量が0.5
〜15重量%のアクリル系共重合体を用いる請求項1記
載の粘着剤。
3. The epoxy group content of (A) is 0.5.
The pressure-sensitive adhesive according to claim 1, wherein the acrylic copolymer is used in an amount of -15% by weight.
【請求項4】(B)としてカルボキシル基、アミド基、
アミノ基の少なくとも一種の含有量が0.5〜15重量
%のアクリル系共重合体を用いる請求項1記載の粘着剤
組成物。
4. A (B) carboxyl group, an amide group,
The pressure-sensitive adhesive composition according to claim 1, wherein an acrylic copolymer having a content of at least one amino group of 0.5 to 15% by weight is used.
JP22876591A 1991-08-13 1991-08-13 Releasable self-adhesive composition Pending JPH0543855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22876591A JPH0543855A (en) 1991-08-13 1991-08-13 Releasable self-adhesive composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22876591A JPH0543855A (en) 1991-08-13 1991-08-13 Releasable self-adhesive composition

Publications (1)

Publication Number Publication Date
JPH0543855A true JPH0543855A (en) 1993-02-23

Family

ID=16881489

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22876591A Pending JPH0543855A (en) 1991-08-13 1991-08-13 Releasable self-adhesive composition

Country Status (1)

Country Link
JP (1) JPH0543855A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003066771A1 (en) * 2002-02-07 2003-08-14 Sumitomo Chemical Company, Limited Adhesive resin composition and use thereof
JP2005325250A (en) * 2004-05-14 2005-11-24 Nitto Denko Corp Pressure-sensitive adhesive sheet or the like for sticking to metallic surface and article having metallic surface
KR100582633B1 (en) * 1997-09-02 2006-08-30 바스프 악티엔게젤샤프트 The Use of Aqueous Polyacrylate Dispersions as Laminating Adhesives
JP2011137181A (en) * 2011-04-11 2011-07-14 Nitto Denko Corp Pressure-sensitive adhesive sheet for sticking to metallic surface and article having metallic surface
JP2012180510A (en) * 2011-02-09 2012-09-20 Nippon Synthetic Chem Ind Co Ltd:The Pressure-sensitive adhesive composition, pressure-sensitive adhesive, and pressure-sensitive adhesive sheet
EP3781622B1 (en) * 2018-04-20 2022-10-12 Basf Se Adhesive compositions with a gelcontent from crosslinking of keto- or aldehyde groups

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100582633B1 (en) * 1997-09-02 2006-08-30 바스프 악티엔게젤샤프트 The Use of Aqueous Polyacrylate Dispersions as Laminating Adhesives
WO2003066771A1 (en) * 2002-02-07 2003-08-14 Sumitomo Chemical Company, Limited Adhesive resin composition and use thereof
JP2005325250A (en) * 2004-05-14 2005-11-24 Nitto Denko Corp Pressure-sensitive adhesive sheet or the like for sticking to metallic surface and article having metallic surface
JP2012180510A (en) * 2011-02-09 2012-09-20 Nippon Synthetic Chem Ind Co Ltd:The Pressure-sensitive adhesive composition, pressure-sensitive adhesive, and pressure-sensitive adhesive sheet
JP2011137181A (en) * 2011-04-11 2011-07-14 Nitto Denko Corp Pressure-sensitive adhesive sheet for sticking to metallic surface and article having metallic surface
EP3781622B1 (en) * 2018-04-20 2022-10-12 Basf Se Adhesive compositions with a gelcontent from crosslinking of keto- or aldehyde groups

Similar Documents

Publication Publication Date Title
US6147165A (en) Pressure-sensitive adhesives for marking films
JPH01234485A (en) Water-based pressure-sensitive adhesive
WO1998003602A1 (en) Heat-sensitive and pressure-sensitive adhesive sheet
JP2006524741A (en) Peelable pressure sensitive adhesive with plasticizer resistance
JP3670049B2 (en) Delayed tack type pressure-sensitive adhesive composition
JP3809314B2 (en) Aqueous pressure-sensitive adhesive composition, production method thereof, and pressure-sensitive adhesive tape or pressure-sensitive adhesive label
JP4763379B2 (en) Pressure-sensitive adhesive resin composition
JPH0543855A (en) Releasable self-adhesive composition
JP2003313528A (en) Aqueous pressure-sensitive adhesive composition
JP6929218B2 (en) Method for Producing Aqueous Adhesive Composition, Aqueous Adhesive Composition and Adhesive Sheet
JPH07157741A (en) Repeelable type aqueous pressure-sensitive composition
JP2001200227A (en) Heat-sensitive, pressure-sensitive adhesive composition; and heat-sensitive, pressure-sensitive adhesive sheet or label
JP3849889B2 (en) Acrylic adhesive composition
JPH1112553A (en) Adhesive composition and transparent tacky film utilizing the same
JP2001089730A (en) Pressure-sensitive adhesive composition and pressure- sensitiive adhesive sheet made thereof
JPS5948047B2 (en) Copolymer emulsion and pressure-sensitive adhesive containing it as an active ingredient
JP3006646B2 (en) Acrylic pressure-sensitive adhesive
JP4161649B2 (en) Heat-sensitive adhesive composition and heat-sensitive adhesive sheet or label
JPS5933602B2 (en) Method of manufacturing pressure sensitive adhesive
JPH0575034B2 (en)
JPH08165464A (en) Water-base pressure-sensitive adhesive
JP2007197694A (en) Emulsion type adhesive and adhesive sheet
JPH04298585A (en) Re-releasing pressure-sensitive adhesive composition capable of transfer coating
JPH07188621A (en) Releasable pressure-sensitive adhesive composition
JPH07150125A (en) Water-based pressure-sensitive adhesive composition