JPH11116927A - Acrylic pressure-sensitive adhesive composition, pressure-sensitive adhesive tape, and formation of pressure-sensitive adhesive layer - Google Patents
Acrylic pressure-sensitive adhesive composition, pressure-sensitive adhesive tape, and formation of pressure-sensitive adhesive layerInfo
- Publication number
- JPH11116927A JPH11116927A JP10209560A JP20956098A JPH11116927A JP H11116927 A JPH11116927 A JP H11116927A JP 10209560 A JP10209560 A JP 10209560A JP 20956098 A JP20956098 A JP 20956098A JP H11116927 A JPH11116927 A JP H11116927A
- Authority
- JP
- Japan
- Prior art keywords
- sensitive adhesive
- pressure
- weight
- meth
- adhesive layer
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、アクリル系粘着剤
組成物、粘着テープ及び粘着剤層の形成方法に関する。
更に詳しくは、本発明は、従来より透湿度の改善された
粘着剤層を与えるアクリル系粘着剤組成物、粘着テープ
及び粘着剤層の形成方法に関する。本発明のアクリル系
粘着剤組成物は、医療用テープ、絶縁用テープ、包装用
テープ、マスキングテープ等の粘着剤層を形成するのに
好適に使用することができる。TECHNICAL FIELD The present invention relates to an acrylic pressure-sensitive adhesive composition, a pressure-sensitive adhesive tape, and a method for forming a pressure-sensitive adhesive layer.
More specifically, the present invention relates to an acrylic pressure-sensitive adhesive composition, a pressure-sensitive adhesive tape, and a method for forming a pressure-sensitive adhesive layer, which provide a pressure-sensitive adhesive layer having improved moisture permeability. The acrylic pressure-sensitive adhesive composition of the present invention can be suitably used for forming a pressure-sensitive adhesive layer such as a medical tape, an insulating tape, a packaging tape, and a masking tape.
【０００２】[0002]
【従来の技術】粘着剤としては、現在天然又は合成ゴ
ム、或いは（メタ）アクリル系ポリマー等の粘着成分
（固形分）を主成分とする粘着剤が知られている。粘着
剤は、溶液型、水性エマルジョン型、ホットメルト型等
が知られている。この内、溶液型粘着剤は、一般に、有
機溶剤とこの有機溶媒に溶解又は分散しうる固形の粘着
成分から構成されている。2. Description of the Related Art As an adhesive, an adhesive mainly comprising an adhesive component (solid content) such as a natural or synthetic rubber or a (meth) acrylic polymer is known. As the pressure-sensitive adhesive, a solution type, an aqueous emulsion type, a hot melt type and the like are known. Among them, the solution-type adhesive is generally composed of an organic solvent and a solid adhesive component that can be dissolved or dispersed in the organic solvent.
【０００３】また、粘着テープは、フィルム等の基材と
粘着剤層の少なくとも２層からなるが、この粘着剤層の
形成方法として、粘着剤を、剥離紙上に塗布・乾燥させ
て粘着剤層を形成し、これをフィルム等の基材上に転写
する方法、粘着剤を基材上に塗布・乾燥させて粘着剤層
を形成させる方法が知られている。[0003] The pressure-sensitive adhesive tape comprises at least two layers of a base material such as a film and a pressure-sensitive adhesive layer. As a method for forming the pressure-sensitive adhesive layer, a pressure-sensitive adhesive is applied to release paper and dried to form a pressure-sensitive adhesive layer. And a method of transferring this onto a substrate such as a film, and a method of applying and drying an adhesive on a substrate to form an adhesive layer.
【０００４】アクリル系粘着剤として、例えば、特公昭
６３−２８１１４号公報では、ポリビニルラクタムと、
（メタ）アクリル酸エステル／エチレン系不飽和酸コポ
リマーとの混合物からなる粘着剤が報告されている。ま
た、特開平２−１１３０８０号公報では、ポリ（メタ）
アクリル酸エステルと酢酸ビニル／ビニルラクタムコポ
リマーとの混合物からなる粘着剤が報告されている。As an acrylic pressure-sensitive adhesive, for example, in Japanese Patent Publication No. 28114/1988, polyvinyl lactam and
An adhesive comprising a mixture of (meth) acrylate / ethylenically unsaturated acid copolymer has been reported. In Japanese Patent Application Laid-Open No. Hei 2-113080, poly (meth)
Adhesives comprising mixtures of acrylic esters and vinyl acetate / vinyl lactam copolymers have been reported.
【０００５】[0005]
【発明が解決しようとする課題】ここで、アクリル系粘
着剤を医療用テープに使用した場合、該テープは皮膚
（被着体）への粘着状態を保持できるよう十分な粘着性
が必要とされる。そのためには、通常２５〜３５μｍ程
度の粘着剤層とされる。ところが、長期間の粘着の際
に、皮膚にかぶれを生じる恐れがあり、このかぶれを避
けるため、粘着剤層が、十分な透湿性を有することが望
まれている。即ち、医療用テープの使用時に、十分な粘
着性と透湿性を満足しうる粘着剤が望まれていた。When an acrylic pressure-sensitive adhesive is used for a medical tape, the tape needs to have sufficient adhesiveness so as to maintain the state of adhesion to the skin (adherend). You. For this purpose, the pressure-sensitive adhesive layer is usually about 25 to 35 μm. However, there is a possibility that the skin will be rash during long-term adhesion, and it is desired that the pressure-sensitive adhesive layer has sufficient moisture permeability in order to avoid this rash. That is, there has been a demand for a pressure-sensitive adhesive that can satisfy sufficient adhesiveness and moisture permeability when a medical tape is used.
【０００６】[0006]
【課題を解決するための手段】本発明の発明者等は、各
種の粘着剤の中で特にアクリル系粘着剤（感圧接着剤）
について研究を重ねたところ、アクリル系粘着剤にポリ
プロピレングリコールを添加すると形成される粘着剤層
の透湿性が著しく向上することを見いだした。液状のポ
リプロピレングリコールは、各種の有機溶剤との相溶性
を有することから、通常医薬のバインダー、医薬用軟膏
基剤、抽出溶剤、樹脂溶剤等に用いられている。しかし
ながら、上記のような粘着剤層の透湿性の向上がどのよ
うな作用機序によるものか現在のところ分からず、全く
意外な結果と考えられる。更に、アクリル系粘着剤の粘
着成分の構成成分として、Ｎ−ビニルピロリドンを用い
ると、粘着剤層の透湿性が更に向上することも見いだし
た。Means for Solving the Problems The present inventors have found that among various pressure-sensitive adhesives, acrylic pressure-sensitive adhesives (pressure-sensitive adhesives) are particularly preferred.
As a result of repeated studies, it was found that the addition of polypropylene glycol to the acrylic pressure-sensitive adhesive significantly improved the moisture permeability of the pressure-sensitive adhesive layer formed. Liquid polypropylene glycol is generally used as a pharmaceutical binder, a pharmaceutical ointment base, an extraction solvent, a resin solvent, and the like because of its compatibility with various organic solvents. However, it is not known at present what mechanism the improvement of the moisture permeability of the pressure-sensitive adhesive layer is due to, and it is considered to be a completely unexpected result. Furthermore, it has been found that when N-vinylpyrrolidone is used as a component of the adhesive component of the acrylic adhesive, the moisture permeability of the adhesive layer is further improved.
【０００７】かくして本発明によれば、（メタ）アクリ
ル系ポリマー５〜６０重量％、（メタ）アクリル系ポリ
マー１００重量部に対して、ポリプロピレングリコール
５〜３５重量部、任意成分としての添加物とを含み、溶
媒により全体が１００重量％に調整されてなるアクリル
系粘着剤組成物が提供される。Thus, according to the present invention, 5 to 60 parts by weight of the (meth) acrylic polymer and 5 to 35 parts by weight of the polypropylene glycol based on 100 parts by weight of the (meth) acrylic polymer, And an acrylic pressure-sensitive adhesive composition adjusted to 100% by weight with a solvent.
【０００８】更に、本発明によれば、基材上に上記アク
リル系粘着剤組成物からなる粘着剤層が形成されてなる
粘着テープが提供される。また、本発明によれば、（メ
タ）アクリル系ポリマー１００重量部に対して、ポリプ
ロピレングリコールを５〜３５重量部添加することによ
り、形成される粘着剤層の透湿度を実質的に上昇させる
ことからなる改良された透湿度を有する粘着剤層の形成
方法が提供される。Further, according to the present invention, there is provided a pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer comprising the above-mentioned acrylic pressure-sensitive adhesive composition formed on a substrate. According to the present invention, the moisture permeability of the formed pressure-sensitive adhesive layer is substantially increased by adding 5 to 35 parts by weight of polypropylene glycol to 100 parts by weight of the (meth) acrylic polymer. And a method for forming a pressure-sensitive adhesive layer having improved moisture permeability comprising:
【０００９】[0009]
【発明の実施の形態】本発明のアクリル系粘着剤組成物
は、基材上に透湿性を有する粘着剤層を形成するために
好適に使用することができる。BEST MODE FOR CARRYING OUT THE INVENTION The acrylic pressure-sensitive adhesive composition of the present invention can be suitably used for forming a pressure-sensitive adhesive layer having moisture permeability on a substrate.
【００１０】本発明の粘着成分である（メタ）アクリル
系ポリマーとしては、当該分野で使用されているポリマ
ーをいずれも使用することができる。例えば、（メタ）
アクリル酸、アルキル（メタ）アクリレート〔メチル
（メタ）アクリレート、エチル（メタ）アクリレート、
ブチル（メタ）アクリレート、２−エチルヘキシル（メ
タ）アクリレート、イソオクチル（メタ）アクリレート
等〕、２−ヒドロキシエチル（メタ）アクリレート等の
モノ（メタ）アクリレート、ジエチレングリコールジ
（メタ）アクリレート、ヘキサンジオールジ（メタ）ア
クリレート等のジ（メタ）アクリレート、ペンタエリス
リトールトリ（メタ）アクリレート等のトリ（メタ）ア
クリレート、（メタ）アクリルアミド、Ｎ，Ｎ−ジメチ
ル（メタ）アクリルアミド等の（メタ）アクリルアミド
等の（メタ）アクリル系モノマーから選択されたモノマ
ーのホモポリマー、並びに２種以上選択するコポリマ
ー、ターポリマー等の多元ポリマーがある。更に、前記
（メタ）アクリル系モノマーと酢酸ビニル、Ｎ−ビニル
ピロリドン、Ｎ−ビニルピペリドン、Ｎ−ビニルカプロ
ラクタム、スチレン等の（メタ）アクリル系モノマー以
外のビニル化合物とのコポリマーが挙げられる。[0010] As the (meth) acrylic polymer which is the adhesive component of the present invention, any polymer used in the art can be used. For example, (meta)
Acrylic acid, alkyl (meth) acrylate [methyl (meth) acrylate, ethyl (meth) acrylate,
Butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, etc.], mono (meth) acrylates such as 2-hydroxyethyl (meth) acrylate, diethylene glycol di (meth) acrylate, hexanediol di (meth) acrylate. ) Di (meth) acrylate such as acrylate, tri (meth) acrylate such as pentaerythritol tri (meth) acrylate, (meth) acrylamide, (meth) acrylamide such as N, N-dimethyl (meth) acrylamide, etc. There are homopolymers of monomers selected from acrylic monomers, and multipolymers such as copolymers and terpolymers selected from two or more. Further, a copolymer of the above (meth) acrylic monomer and a vinyl compound other than the (meth) acrylic monomer such as vinyl acetate, N-vinylpyrrolidone, N-vinylpiperidone, N-vinylcaprolactam, and styrene can be used.
【００１１】また、（メタ）アクリル系ポリマーとし
て、「粘着技術ハンドブック」（発行所：日刊工業新聞
社、１９９７年３月３１日発行）の「アクリル系粘着
剤」の章第４３５〜４９４頁に記載された粘着剤、こと
に第４８８〜４９４頁に記載のモノマー類から得られる
ポリマーをいずれも使用することができる。更に、上記
コポリマーに他のポリマー又はコポリマーを複数種混合
してもよい。他のポリマー又はコポリマーとしては、例
えば上記コポリマー、上記モノマーから得られるポリマ
ーが挙げられる。[0011] As a (meth) acrylic polymer, see “Adhesive Technique Handbook” (published by Nikkan Kogyo Shimbun, published on March 31, 1997), chapter “Acrylic Adhesives”, pp. 435-494. Any of the pressure-sensitive adhesives described, especially polymers obtained from the monomers described on pages 488 to 494, can be used. Further, a plurality of other polymers or copolymers may be mixed with the above copolymer. Other polymers or copolymers include, for example, the above copolymers and polymers obtained from the above monomers.
【００１２】上記の（メタ）アクリル系ポリマーの内、
Ｎ−ビニルピロリドン由来の成分が含まれているポリマ
ーがより好ましい。Ｎ−ビニルピロリドン由来の成分
は、（メタ）アクリル系ポリマー１００重量部中に、１
〜１０重量部存在させることが好ましく、３〜８重量部
存在させることがより好ましい。なお、（メタ）アクリ
ル系ポリマーは、ブロック型、ランダム型のいずれの構
造を有していてもよい。Among the above (meth) acrylic polymers,
Polymers containing components derived from N-vinylpyrrolidone are more preferred. The component derived from N-vinylpyrrolidone is contained in 100 parts by weight of the (meth) acrylic polymer.
Preferably, it is present in an amount of 10 to 10 parts by weight, more preferably 3 to 8 parts by weight. The (meth) acrylic polymer may have any of a block type and a random type.
【００１３】ここで、上記（メタ）アクリル系ポリマー
の内、Ｎ−ビニルピロリドンと（メタ）アクリル系モノ
マーとのコポリマーが特に好ましい。また、Ｎ−ビニル
ピロリドン／（メタ）アクリル系モノマーとのコポリマ
ーをＮ−ビニルピロリドン由来の成分を含まない（メ
タ）アクリル系ポリマーに混合した混合物も好適に使用
することができる。Here, among the above (meth) acrylic polymers, a copolymer of N-vinylpyrrolidone and a (meth) acrylic monomer is particularly preferred. Further, a mixture obtained by mixing a copolymer with N-vinylpyrrolidone / (meth) acrylic monomer with a (meth) acrylic polymer containing no component derived from N-vinylpyrrolidone can also be suitably used.
【００１４】本発明のアクリル系粘着剤組成物は、ポリ
プロピレングリコールが含まれている。ポリプロピレン
グリコールを含むことにより、後の粘着剤層の形成時
に、粘着剤層に十分な透湿度を与えるアクリル系粘着剤
組成物を得ることができる。ポリプロピレングリコール
は、その重合度により種々の数平均分子量のものが得ら
れるが、本発明では、４００〜６０００、好ましくは４
００〜４０００、具体的には４００、１０００、２００
０、３０００及び４０００のものを使用することができ
る。特に、２０００以上の数平均分子量のものを使用す
ることが好ましく、２０００〜４０００の数平均分子量
のものを使用することがより好ましい。数平均分子量が
２０００より小さいポリプロピレングリコールを使用す
ると、後に形成される粘着剤層を剥がした時に、被着体
の表面に粘着剤層が残る場合がある。しかしながら、粘
着剤層を剥がす必要のない用途、残っても問題を生じな
い用途では、２０００より小さい数平均分子量のポリプ
ロピレングリコールを使用しても差し支えない。なお、
ポリプロピレングリコールとしては、例えば、三洋化成
社製のニューポールシリーズＰＰ−４０００，ＰＰ−３
０００，ＰＰ−２０００，ＰＰ−１０００，ＰＰ−４０
０（いずれも商品名）を使用することができる。The acrylic pressure-sensitive adhesive composition of the present invention contains polypropylene glycol. By containing the polypropylene glycol, an acrylic pressure-sensitive adhesive composition that gives sufficient pressure to the pressure-sensitive adhesive layer when forming the pressure-sensitive adhesive layer later can be obtained. Polypropylene glycols having various number average molecular weights can be obtained depending on the degree of polymerization, but in the present invention, 400-6000, preferably 4
00 to 4000, specifically 400, 1000, 200
0, 3000 and 4000 can be used. In particular, those having a number average molecular weight of 2000 or more are preferably used, and those having a number average molecular weight of 2000 to 4000 are more preferably used. When a polypropylene glycol having a number average molecular weight of less than 2,000 is used, the pressure-sensitive adhesive layer may remain on the surface of the adherend when the pressure-sensitive adhesive layer formed later is peeled off. However, in applications where it is not necessary to peel off the pressure-sensitive adhesive layer, or in applications where there is no problem if the adhesive layer remains, polypropylene glycol having a number average molecular weight of less than 2,000 may be used. In addition,
Examples of the polypropylene glycol include, for example, New Pole Series PP-4000 and PP-3 manufactured by Sanyo Chemical Industries, Ltd.
000, PP-2000, PP-1000, PP-40
0 (all trade names) can be used.
【００１５】次に、ポリプロピレングリコールは、（メ
タ）アクリル系ポリマー１００重量部に対して５〜３５
重量部の割合で添加することが好ましい。添加量が５重
量部より少ない場合、後の粘着剤層の形成時に、粘着剤
層に所望の透湿度を与えることができないため好ましく
ない。一方、３５重量部より多い場合、正常な粘着剤層
の形成が困難であるため好ましくない。特に好ましいポ
リプロピレングリコールの添加量は１０〜２５重量部で
ある。この範囲の添加量であれば、被着体に粘着剤層が
残る場合が少ないからである。但し、上記でも説明した
ように、粘着剤層が残っても問題のない用途であれば、
この範囲以外の添加量でも差し支えない。Next, the polypropylene glycol is added in an amount of 5 to 35 parts per 100 parts by weight of the (meth) acrylic polymer.
It is preferable to add in parts by weight. If the addition amount is less than 5 parts by weight, a desired moisture permeability cannot be given to the pressure-sensitive adhesive layer at the time of forming the pressure-sensitive adhesive layer later, which is not preferable. On the other hand, when the amount is more than 35 parts by weight, it is difficult to form a normal pressure-sensitive adhesive layer, which is not preferable. A particularly preferred addition amount of polypropylene glycol is 10 to 25 parts by weight. If the amount is within this range, the pressure-sensitive adhesive layer is less likely to remain on the adherend. However, as described above, if there is no problem even if the pressure-sensitive adhesive layer remains,
Addition amounts outside this range may be used.
【００１６】本発明のアクリル系粘着剤組成物には、
（メタ）アクリル系ポリマーを有機溶媒中に溶解又は分
散した溶液型、水中に分散させた水分散型等の形態が含
まれる。なお、（メタ）アクリル系ポリマーは、アクリ
ル系粘着剤組成物中に５重量％以上含まれている。な
お、上限は特に限定されないが、濃度が高い場合、取り
扱いが困難になるため６０重量％以下が好ましい。The acrylic pressure-sensitive adhesive composition of the present invention includes:
Examples include a solution type in which the (meth) acrylic polymer is dissolved or dispersed in an organic solvent, and an aqueous dispersion type in which the (meth) acrylic polymer is dispersed in water. The (meth) acrylic polymer is contained in the acrylic pressure-sensitive adhesive composition in an amount of 5% by weight or more. The upper limit is not particularly limited, but when the concentration is high, handling becomes difficult, so that the content is preferably 60% by weight or less.
【００１７】より具体的には、粘着剤組成物が、マスキ
ングテープの粘着剤層の形成に使用される場合、（メ
タ）アクリル系ポリマーを好ましくは５〜２０重量％、
更に好ましくは５〜１５重量％含む。粘着剤組成物が両
面テープの粘着剤層の形成に使用される場合、（メタ）
アクリル系ポリマーを好ましくは４０〜６０重量％、更
に好ましくは４５〜５５重量％含む。粘着剤組成物が医
療用テープの粘着剤層の形成に使用される場合、（メ
タ）アクリル系ポリマーを好ましくは３０〜６０重量
％、更に好ましくは３５〜５０重量％含む。溶液型のア
クリル系粘着剤組成物における有機溶媒としては、当該
分野で公知のものをいずれも使用することができ、例え
ば、トルエン、キシレン、ヘキサン、酢酸エチル等が挙
げられる。More specifically, when the pressure-sensitive adhesive composition is used for forming a pressure-sensitive adhesive layer of a masking tape, the content of the (meth) acrylic polymer is preferably 5 to 20% by weight,
More preferably, the content is 5 to 15% by weight. When the pressure-sensitive adhesive composition is used for forming a pressure-sensitive adhesive layer of a double-sided tape, (meth)
The acrylic polymer is preferably contained in an amount of 40 to 60% by weight, more preferably 45 to 55% by weight. When the pressure-sensitive adhesive composition is used for forming a pressure-sensitive adhesive layer of a medical tape, it preferably contains 30 to 60% by weight, more preferably 35 to 50% by weight of a (meth) acrylic polymer. As the organic solvent in the solution-type acrylic pressure-sensitive adhesive composition, any of those known in the art can be used, and examples thereof include toluene, xylene, hexane, and ethyl acetate.
【００１８】ここで、アクリル系粘着剤組成物に、凝集
力を高めかつ被着体への粘着性を向上させるために架橋
剤（任意成分）を添加してもよい。架橋剤には、イソシ
アネート系架橋剤を使用することが好ましい。具体的に
は、トリレンジイソシアネート（ＴＤＩ）、ジフェニル
メタンジイソシアネート（ＭＤＩ）、トルイジンジイソ
シアネート（ＴＯＤＩ）、キシリレンジイソシアネート
（ＸＤＩ）、ヘキサメチレンジイソシアネート（ＨＭＤ
Ｉ）、トリメチロールプロパン（ＴＭＰ）−ＴＤＩ付加
物、多官能性芳香族ポリイソシアネート（ＴＤＩ重合
体）、ポリメチレンポリフェニルイソシアネート、及び
これらの部分変性体等が挙げられる。架橋剤は、溶液型
のアクリル系粘着剤組成物の場合、（メタ）アクリル系
ポリマー１００重量部に対して０．０５〜５重量部含ま
れていることが好ましい。他の架橋剤として、（メタ）
アクリル系ポリマーの架橋に使用し得るものが挙げら
れ、例えば、アジリジン系、エポキシ系、金属キレート
系等、メラミン系及び特公平６−９９６７１号公報に記
載された変性イソシアネート系も使用できる。Here, a crosslinking agent (optional component) may be added to the acrylic pressure-sensitive adhesive composition in order to increase the cohesive force and improve the adhesion to the adherend. It is preferable to use an isocyanate-based crosslinking agent as the crosslinking agent. Specifically, tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), toluidine diisocyanate (TODI), xylylene diisocyanate (XDI), hexamethylene diisocyanate (HMD)
I), trimethylolpropane (TMP) -TDI adduct, polyfunctional aromatic polyisocyanate (TDI polymer), polymethylene polyphenylisocyanate, and partially modified products thereof. In the case of a solution type acrylic pressure-sensitive adhesive composition, the crosslinking agent is preferably contained in an amount of 0.05 to 5 parts by weight based on 100 parts by weight of the (meth) acrylic polymer. As other crosslinking agents, (meth)
Examples thereof include those which can be used for crosslinking an acrylic polymer, and for example, aziridine-based, epoxy-based, metal chelate-based, melamine-based and modified isocyanate-based compounds described in JP-B-6-99671 can also be used.
【００１９】また、本発明のアクリル系粘着剤組成物に
は、任意成分として、当該分野で通常使用される安定
剤、着色剤、充填剤、可塑剤、タッキファイヤー樹脂を
添加してもよい。更に、本発明によれば、基材上に上記
アクリル系粘着剤組成物からなる粘着剤層が形成されて
なる粘着テープが提供される。粘着剤層の形成方法とし
ては、当該分野で公知の方法をいずれも使用することが
できる。例えば、アクリル系粘着剤組成物を、剥離紙上
に塗布・乾燥させて接着剤層を形成し、これをフィルム
等の基材上に転写する方法、アクリル系粘着剤組成物を
基材上に塗布・乾燥させて粘着剤層を形成させる方法が
挙げられる。The acrylic pressure-sensitive adhesive composition of the present invention may contain, as optional components, stabilizers, coloring agents, fillers, plasticizers, and tackifier resins commonly used in the art. Further, according to the present invention, there is provided a pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer formed of the acrylic pressure-sensitive adhesive composition formed on a substrate. As a method for forming the pressure-sensitive adhesive layer, any method known in the art can be used. For example, a method in which an acrylic pressure-sensitive adhesive composition is applied to a release paper and dried to form an adhesive layer, and this is transferred to a substrate such as a film, and the acrylic pressure-sensitive adhesive composition is applied to the substrate. -A method of forming an adhesive layer by drying.
【００２０】ここで、基材としては、紙、織布、不織
布、更には透湿性が付与されたプラスチックフィルムや
金属箔等が挙げられる。なお、溶液型のアクリル系粘着
剤組成物の場合、このアクリル系粘着剤組成物をそのま
ま塗布することが困難である場合は、トルエン、キシレ
ン、ヘキサン、酢酸エチル等の溶剤を加えて粘度を低下
させて使用することが好ましい。Here, examples of the substrate include paper, woven fabric, non-woven fabric, and plastic film or metal foil imparted with moisture permeability. In the case of a solution-type acrylic pressure-sensitive adhesive composition, if it is difficult to apply the acrylic pressure-sensitive adhesive composition as it is, a solvent such as toluene, xylene, hexane, or ethyl acetate is added to lower the viscosity. It is preferable to use them.
【００２１】塗工方法としては、例えば、リバースロー
ル、ナイフオーバーロール、ロールオーバーロール等の
方法が挙げられる。また、乾燥は、一段乾燥でも多段乾
燥でもよい。乾燥温度は、アクリル系粘着剤組成物を構
成する成分が変質しない程度、例えば４０〜１２０℃の
間で行うことが好ましい。上記方法により形成された粘
着剤層は、１〜７０μｍの厚さを有することが好まし
い。１μｍより薄い場合、粘着力が不足する場合がある
ため好ましくない。一方、７０μｍより厚い場合、透湿
度が低下すると共に粘着剤層を剥がした時に、被着体の
表面に粘着剤層が残る場合があるため好ましくない。特
に、医療用粘着テープの分野では、粘着剤層の厚さは、
１０〜６０μｍであることが好ましく、１０〜４０μｍ
が更に好ましく、特に２５〜３５μｍが好ましい。The coating method includes, for example, reverse roll, knife over roll, roll over roll and the like. The drying may be single-stage drying or multi-stage drying. The drying temperature is preferably such that the components constituting the acrylic pressure-sensitive adhesive composition do not deteriorate, for example, between 40 and 120 ° C. The pressure-sensitive adhesive layer formed by the above method preferably has a thickness of 1 to 70 μm. When the thickness is less than 1 μm, the adhesive strength may be insufficient, which is not preferable. On the other hand, when the thickness is larger than 70 μm, the moisture permeability is reduced and the adhesive layer may remain on the surface of the adherend when the adhesive layer is peeled off, which is not preferable. In particular, in the field of medical adhesive tape, the thickness of the adhesive layer,
10 to 60 μm, preferably 10 to 40 μm
Is more preferable, and particularly preferably 25 to 35 μm.
【００２２】本発明のアクリル系粘着剤組成物により得
られる粘着剤層は、粘着剤層の厚さにより異なるが、１
０００ｇ／ｍ2 ・２４時間以上の透湿度を有することが
好ましい。本発明のアクリル系粘着剤組成物は、医療用
テープ、絶縁用テープ、包装用テープ、マスキングテー
プ等の粘着剤層の形成の用途に使用できる。更に、本発
明によれば、（メタ）アクリル系ポリマー１００重量部
に対して、ポリプロピレングリコールを５〜３５重量部
添加することにより、形成される粘着剤層の透湿度を実
質的に上昇させることからなる改良された透湿度を有す
る粘着剤層の形成方法も提供される。The pressure-sensitive adhesive layer obtained from the acrylic pressure-sensitive adhesive composition of the present invention varies depending on the thickness of the pressure-sensitive adhesive layer.
It preferably has a moisture permeability of 000 g / m 2 · 24 hours or more. The acrylic pressure-sensitive adhesive composition of the present invention can be used for forming a pressure-sensitive adhesive layer such as a medical tape, an insulating tape, a packaging tape, and a masking tape. Further, according to the present invention, by adding 5-35 parts by weight of polypropylene glycol to 100 parts by weight of the (meth) acrylic polymer, the moisture permeability of the formed pressure-sensitive adhesive layer is substantially increased. A method for forming a pressure-sensitive adhesive layer having improved moisture permeability comprising the steps of:
【００２３】[0023]
【実施例】以下、実施例及び比較例により更に詳細に本
発明を説明する。なお、実施例及び比較例において、透
湿度及び粘着力は以下の方法により測定した。The present invention will be described below in more detail with reference to Examples and Comparative Examples. In Examples and Comparative Examples, the moisture permeability and the adhesive strength were measured by the following methods.
【００２４】（１）透湿度 気体を透過しうる性質は透気性と言われている。気体の
一種である水蒸気を透過しうる性質が透湿性である。透
湿性の程度が透湿度であり、この透湿度を以下の実施例
では、ＪＩＳ Ｌ １０９９のＡ−２法に準じて測定し
た値で表している。(1) Moisture permeability The property of allowing gas to pass through is called air permeability. The property of transmitting water vapor, which is a kind of gas, is moisture permeability. The degree of moisture permeability is moisture permeability. In the following examples, the moisture permeability is represented by a value measured according to the A-2 method of JIS L1099.
【００２５】（２）粘着力 アクリル系粘着剤組成物を剥離紙上に塗布・乾燥後、基
材に転写して養生（４０℃、３日間）させて粘着剤層を
形成した。この粘着剤層を厚さ３ｍｍのスリガラス（被
着体）上に２ｋｇのゴムローラーを１往復させることに
より貼着した。直ちに、２３℃、６５％ＲＨの環境下
で、３００ｍｍ／分で１８０°の角度で剥がす（１８０
°ピール）のに要した力（ｇ数）を測定した。得られた
値を粘着力（ｇ／２５ｍｍ幅）と称する。なお、粘着剤
層を転写する基材は、厚さ２５μｍ、透湿度２０８０ｇ
／ｍ2 ・２４時間の押出ポリウレタンフィルム（大倉工
業社製）を使用した。(2) Adhesive Strength The acrylic pressure-sensitive adhesive composition was applied to release paper, dried, transferred to a substrate, and cured (40 ° C., 3 days) to form a pressure-sensitive adhesive layer. This pressure-sensitive adhesive layer was stuck on a 3 mm-thick ground glass (adherend) by reciprocating a 2 kg rubber roller once. Immediately, peel off at an angle of 180 ° at 300 mm / min under an environment of 23 ° C. and 65% RH (180 °).
° peel) was measured. The value obtained is called the adhesive strength (g / 25 mm width). The substrate on which the pressure-sensitive adhesive layer is transferred has a thickness of 25 μm and a moisture permeability of 2080 g.
/ M 2 · 24 hours extruded polyurethane film (manufactured by Okura Industries Co., Ltd.).
【００２６】実施例１ ２−エチルヘキシルアクリレート５６．８重量部、ブチ
ルアクリレート３５重量部、アクリル酸３重量部、２−
ヒドロキシエチルメタクリレート０．２重量部、ビニル
ピロリドン５重量部、重合開始剤（アゾビスイソブチロ
ニトリル、ＡＩＢＮ）０．２重量部、溶剤としてトルエ
ン３６重量部、酢酸エチル８６重量部を含む混合物を常
法に従って重合反応させた。反応の結果、（メタ）アク
リル系ポリマー（固形分）約４５重量％、粘度約５００
０ｃｐｓのアクリル系粘着剤が得られた。なお、このア
クリル系粘着剤を以下ではＡ−５と称し、共重合体中に
５重量部のＮ−ビニルピロリドンを含んでいる。Example 1 56.8 parts by weight of 2-ethylhexyl acrylate, 35 parts by weight of butyl acrylate, 3 parts by weight of acrylic acid,
A mixture containing 0.2 parts by weight of hydroxyethyl methacrylate, 5 parts by weight of vinylpyrrolidone, 0.2 parts by weight of a polymerization initiator (azobisisobutyronitrile, AIBN), 36 parts by weight of toluene as a solvent, and 86 parts by weight of ethyl acetate. The polymerization reaction was carried out according to a conventional method. As a result of the reaction, a (meth) acrylic polymer (solid content) was about 45% by weight, and a viscosity was about 500.
An acrylic adhesive of 0 cps was obtained. The acrylic pressure-sensitive adhesive is hereinafter referred to as A-5, and the copolymer contains 5 parts by weight of N-vinylpyrrolidone.
【００２７】アクリル系粘着剤Ａ−５（固形分換算）１
００重量部に、イソシアネート系の架橋剤としてコロネ
ートＬ−５５Ｅ（日本ポリウレタン社製）を３．７重量
部（固形分換算）とポリプロピレングリコールとしてニ
ューポールＰＰ４０００（三洋化成社製、数平均分子量
４０００）を２２重量部とを添加し、攪拌後、静置脱泡
して、アクリル系粘着剤組成物を得た。Acrylic adhesive A-5 (solid content conversion) 1
To 00 parts by weight, 3.7 parts by weight (in terms of solid content) of Coronate L-55E (manufactured by Nippon Polyurethane) as an isocyanate-based cross-linking agent and Newpol PP4000 (manufactured by Sanyo Chemical Industries, number average molecular weight 4000) as polypropylene glycol. Was added, and the mixture was stirred and defoamed by standing to obtain an acrylic pressure-sensitive adhesive composition.
【００２８】このアクリル系粘着剤組成物を剥離紙Ｋ−
８０ＨＳ（サンエー化研社製）上に塗布し、１００℃で
２分間乾燥させた。乾燥後の粘着剤層の厚さは約２５μ
ｍであった。この粘着剤層を、基材に転写し、４０℃で
３日間養生させることにより粘着テープを製造した。次
いで、剥離紙を剥がし、上記方法により透湿度及び粘着
力を測定した。測定結果を、目視による剥離状況、アク
リル系粘着剤組成物の配合割合及び粘着剤層の厚さと併
せて表１に記載した。This acrylic pressure-sensitive adhesive composition was coated on release paper K-
It was applied on 80HS (manufactured by San-A Kaken) and dried at 100 ° C. for 2 minutes. The thickness of the adhesive layer after drying is about 25μ
m. This pressure-sensitive adhesive layer was transferred to a substrate and cured at 40 ° C. for 3 days to produce a pressure-sensitive adhesive tape. Next, the release paper was peeled off, and the moisture permeability and adhesive strength were measured by the above-described methods. The measurement results are shown in Table 1 together with the visual peeling state, the mixing ratio of the acrylic pressure-sensitive adhesive composition, and the thickness of the pressure-sensitive adhesive layer.
【００２９】比較例１ ポリプロピレングリコールを添加しないこと以外は、上
記実施例１と同様にして粘着テープを製造し、透湿度及
び粘着力を測定した。測定結果を、目視による剥離状
況、アクリル系粘着剤組成物の配合割合及び粘着剤層の
厚さと併せて表１に記載した。Comparative Example 1 An adhesive tape was produced in the same manner as in Example 1 except that polypropylene glycol was not added, and the moisture permeability and adhesive strength were measured. The measurement results are shown in Table 1 together with the visual peeling state, the mixing ratio of the acrylic pressure-sensitive adhesive composition, and the thickness of the pressure-sensitive adhesive layer.
【００３０】実施例２及び３ Ａ−５の２−エチルヘキシルアクリレートとＮ−ビニル
ピロリドンの含有量を、それぞれ５８．８重量部及び３
重量部、５４．８重量部及び７重量部とすること以外は
実施例１と同様にして粘着テープを製造し、透湿度及び
粘着力を測定した。測定結果を、目視による剥離状況、
アクリル系粘着剤組成物の配合割合及び粘着剤層の厚さ
と併せて表１に記載した。Ｎ−ビニルピロリドン含有比
率が３重量部及び７重量部のものを、Ａ−３（実施例
２）及びＡ−７（実施例３）と称する。Examples 2 and 3 The content of 2-ethylhexyl acrylate and N-vinylpyrrolidone in A-5 was 58.8 parts by weight and 3
A pressure-sensitive adhesive tape was manufactured in the same manner as in Example 1 except that the weight parts, 54.8 parts by weight, and 7 parts by weight were used, and the moisture permeability and the adhesive strength were measured. The measurement result, the visual peeling situation,
The results are shown in Table 1 together with the mixing ratio of the acrylic pressure-sensitive adhesive composition and the thickness of the pressure-sensitive adhesive layer. Those having an N-vinylpyrrolidone content ratio of 3 parts by weight and 7 parts by weight are referred to as A-3 (Example 2) and A-7 (Example 3).
【００３１】比較例２及び３ ポリプロピレングリコールを添加しないこと以外は実施
例２（比較例２）及び実施例３（比較例３）と同様にし
て粘着テープを製造し、透湿度及び粘着力を測定した。
測定結果を、目視による剥離状況、アクリル系粘着剤組
成物の配合割合及び粘着剤層の厚さと併せて表１に記載
した。Comparative Examples 2 and 3 An adhesive tape was produced in the same manner as in Example 2 (Comparative Example 2) and Example 3 (Comparative Example 3) except that polypropylene glycol was not added, and the moisture permeability and adhesive strength were measured. did.
The measurement results are shown in Table 1 together with the visual peeling state, the mixing ratio of the acrylic pressure-sensitive adhesive composition, and the thickness of the pressure-sensitive adhesive layer.
【００３２】実施例４〜７ 数平均分子量が３０００（実施例４）、２０００（実施
例５）、１０００（実施例６）及び４００（実施例７）
（それぞれニューポールＰＰ３０００、ＰＰ２０００、
ＰＰ１０００及びＰＰ４００、いずれも三洋化成社製）
のポリプロピレングリコールを使用すること以外は実施
例１と同様にして粘着テープを製造し、透湿度及び粘着
力を測定した。測定結果を、目視による剥離状況、アク
リル系粘着剤組成物の配合割合及び粘着剤層の厚さと併
せて表１に記載した。Examples 4 to 7 The number average molecular weight was 3000 (Example 4), 2000 (Example 5), 1000 (Example 6) and 400 (Example 7).
(Newpole PP3000, PP2000, respectively
(PP1000 and PP400, both manufactured by Sanyo Chemical Co., Ltd.)
A pressure-sensitive adhesive tape was produced in the same manner as in Example 1 except that polypropylene glycol was used, and the moisture permeability and the adhesive strength were measured. The measurement results are shown in Table 1 together with the visual peeling state, the mixing ratio of the acrylic pressure-sensitive adhesive composition, and the thickness of the pressure-sensitive adhesive layer.
【００３３】実施例８及び９ ポリプロピレングリコールの添加量を３３重量部に増や
すこと（実施例８）及び１１重量部に減らすこと（実施
例９）以外は実施例１と同様にして粘着テープを製造
し、透湿度及び粘着力を測定した。測定結果を、目視に
よる剥離状況、アクリル系粘着剤組成物の配合割合及び
粘着剤層の厚さと併せて表１に記載した。Examples 8 and 9 A pressure-sensitive adhesive tape was produced in the same manner as in Example 1 except that the amount of polypropylene glycol added was increased to 33 parts by weight (Example 8) and reduced to 11 parts by weight (Example 9). Then, the moisture permeability and the adhesive strength were measured. The measurement results are shown in Table 1 together with the visual peeling state, the mixing ratio of the acrylic pressure-sensitive adhesive composition, and the thickness of the pressure-sensitive adhesive layer.
【００３４】実施例１０〜１５ 乾燥後の粘着剤層の厚さを１０μｍ（実施例１０）、２
０μｍ（実施例１１）、２５μｍ（実施例１２）、３０
μｍ（実施例１３）、４０μｍ（実施例１４）、５０μ
ｍ（実施例１５）とし、ポリプロピレングリコール及び
架橋剤の添加量をそれぞれ１１重量部及び１．８重量部
すること以外は実施例１と同様にして粘着テープを製造
し、透湿度及び粘着力を測定した。測定結果を、目視に
よる剥離状況、アクリル系粘着剤組成物の配合割合及び
粘着剤層の厚さと併せて表１に記載した。Examples 10 to 15 The thickness of the adhesive layer after drying was 10 μm (Example 10),
0 μm (Example 11), 25 μm (Example 12), 30 μm
μm (Example 13), 40 μm (Example 14), 50 μm
m (Example 15), an adhesive tape was produced in the same manner as in Example 1 except that the addition amounts of the polypropylene glycol and the crosslinking agent were 11 parts by weight and 1.8 parts by weight, respectively. It was measured. The measurement results are shown in Table 1 together with the visual peeling state, the mixing ratio of the acrylic pressure-sensitive adhesive composition, and the thickness of the pressure-sensitive adhesive layer.
【００３５】実施例１６ ２−エチルヘキシルアクリレート７０重量部、酢酸ビニ
ル２６．８重量部、アクリル酸３重量部、２−ヒドロキ
シエチルメタクリレート０．２重量部、重合開始剤（Ａ
ＩＢＮ）０．２重量部、溶剤としてトルエン７３重量
部、酢酸エチル４９重量部を含む混合物を常法に従って
重合反応させた。反応の結果、固形分約４５重量％、粘
度約８０００ｃｐｓのアクリル系粘着剤が得られた。こ
のアクリル系粘着剤を以下ではＢ−０と称する。Example 16 70 parts by weight of 2-ethylhexyl acrylate, 26.8 parts by weight of vinyl acetate, 3 parts by weight of acrylic acid, 0.2 parts by weight of 2-hydroxyethyl methacrylate, a polymerization initiator (A
A mixture containing 0.2 parts by weight of IBN), 73 parts by weight of toluene as a solvent, and 49 parts by weight of ethyl acetate was subjected to a polymerization reaction according to a conventional method. As a result of the reaction, an acrylic pressure-sensitive adhesive having a solid content of about 45% by weight and a viscosity of about 8000 cps was obtained. This acrylic pressure-sensitive adhesive is hereinafter referred to as B-0.
【００３６】アクリル系粘着剤として、Ｂ−０を使用す
ること以外は、実施例１と同様にして粘着テープを製造
し、透湿度及び粘着力を測定した。測定結果を、目視に
よる剥離状況、アクリル系粘着剤組成物の配合割合及び
粘着剤層の厚さと併せて表２に記載した。A pressure-sensitive adhesive tape was produced in the same manner as in Example 1 except that B-0 was used as the acrylic pressure-sensitive adhesive, and the moisture permeability and the adhesive strength were measured. The measurement results are shown in Table 2 together with the visual peeling state, the mixing ratio of the acrylic pressure-sensitive adhesive composition, and the thickness of the pressure-sensitive adhesive layer.
【００３７】比較例４ ポリプロピレングリコールを添加しないこと以外は上記
実施例１６と同様にして粘着テープを製造し、透湿度及
び粘着力を測定した。測定結果を、目視による剥離状
況、アクリル系粘着剤組成物の配合割合及び粘着剤層の
厚さと併せて表２に記載した。Comparative Example 4 An adhesive tape was produced in the same manner as in Example 16 except that polypropylene glycol was not added, and the moisture permeability and adhesive strength were measured. The measurement results are shown in Table 2 together with the visual peeling state, the mixing ratio of the acrylic pressure-sensitive adhesive composition, and the thickness of the pressure-sensitive adhesive layer.
【００３８】実施例１７〜１９ アクリル酸メチル７０重量部、Ｎ−ビニルピロリドン３
０重量部、重合開始剤（ＡＩＢＮ）０．２重量部、酢酸
エチル６１重量部及びトルエン６１重量部を用いて、常
法で重合反応させた。反応の結果、固形分約４５．０重
量％、粘度約５５００ｃｐｓのＮ−ビニルピロリドン／
アクリル酸メチルコポリマー（以下、このコポリマーを
ＶＰ／ＭＡと称する）が得られた。Examples 17 to 19 70 parts by weight of methyl acrylate, N-vinylpyrrolidone 3
Using 0 parts by weight, 0.2 parts by weight of a polymerization initiator (AIBN), 61 parts by weight of ethyl acetate, and 61 parts by weight of toluene, a polymerization reaction was carried out in a conventional manner. As a result of the reaction, N-vinylpyrrolidone having a solid content of about 45.0% by weight and a viscosity of about 5500 cps /
A methyl acrylate copolymer (hereinafter, this copolymer is referred to as VP / MA) was obtained.
【００３９】このＶＰ／ＭＡを１０重量部（実施例１
７）、１６．５重量部（実施例１８）及び２３重量部
（実施例１９）添加すること以外は実施例１６と同様に
して粘着テープを製造し、透湿度及び粘着力を測定し
た。測定結果を、目視による剥離状況、アクリル系粘着
剤組成物の配合割合及び粘着剤層の厚さと併せて表２に
記載した。10 parts by weight of this VP / MA (Example 1)
7) An adhesive tape was produced in the same manner as in Example 16 except that 16.5 parts by weight (Example 18) and 23 parts by weight (Example 19) were added, and the moisture permeability and adhesive strength were measured. The measurement results are shown in Table 2 together with the visual peeling state, the mixing ratio of the acrylic pressure-sensitive adhesive composition, and the thickness of the pressure-sensitive adhesive layer.
【００４０】比較例５〜７ ポリプロピレングリコールを添加しないこと以外は実施
例１７（比較例５）、実施例１８（比較例６）及び実施
例１９（比較例７）と同様にして粘着テープを製造し、
透湿度及び粘着力を測定した。測定結果を、目視による
剥離状況、アクリル系粘着剤組成物の配合割合及び粘着
剤層の厚さと併せて表２に記載した。Comparative Examples 5 to 7 Except that no polypropylene glycol was added, an adhesive tape was produced in the same manner as in Example 17 (Comparative Example 5), Example 18 (Comparative Example 6) and Example 19 (Comparative Example 7). And
The moisture permeability and adhesive strength were measured. The measurement results are shown in Table 2 together with the visual peeling state, the mixing ratio of the acrylic pressure-sensitive adhesive composition, and the thickness of the pressure-sensitive adhesive layer.
【００４１】[0041]
【表１】 [Table 1]
【００４２】[0042]
【表２】 [Table 2]
【００４３】実施例２０〜２２ 実施例１、９及び１２（それぞれ実施例２０、２１及び
２２に対応する）の粘着テープを貼り付け後、圧力８０
ｇ／ｃｍ2 で、４０℃・１０日間加圧した。加圧後の粘
着テープの透湿度、粘着力及び目視による剥離状況を表
３に示した。Examples 20 to 22 After the adhesive tapes of Examples 1, 9 and 12 (corresponding to Examples 20, 21 and 22, respectively) were applied, a pressure of 80
It was pressurized at 40 ° C. for 10 days at g / cm 2 . Table 3 shows the moisture permeability, adhesive strength, and visual peeling state of the pressure-sensitive adhesive tape.
【００４４】[0044]
【表３】 [Table 3]
【００４５】表１〜表３中、ＡＦは被着体の界面から粘
着剤層が剥離したことを示している。ＣＦは、粘着剤層
が凝集破壊され、被着体の表面上に粘着剤層が残存して
いることを示している。なお、実施例１〜１９のアクリ
ル系粘着剤組成物の各成分の割合を表４にまとめる。In Tables 1 to 3, AF indicates that the pressure-sensitive adhesive layer was separated from the interface of the adherend. CF indicates that the pressure-sensitive adhesive layer is cohesively broken and the pressure-sensitive adhesive layer remains on the surface of the adherend. Table 4 summarizes the proportions of the components of the acrylic pressure-sensitive adhesive compositions of Examples 1 to 19.
【００４６】[0046]
【表４】 [Table 4]
【００４７】表１〜表３より以下の事項が明らかとなっ
た。まず、実施例１と比較例１及び実施例１６と比較例
４によれば、Ｎ−ビニルピロリドンを共重合させたアク
リル系粘着剤組成物でも、Ｎ−ビニルピロリドンを含ま
ないアクリル系粘着剤組成物でも、ポリプロピレングリ
コールを添加することにより透湿度が両方とも向上する
ことがわかった。The following items became clear from Tables 1 to 3. First, according to Example 1 and Comparative Example 1, and Example 16 and Comparative Example 4, even the acrylic pressure-sensitive adhesive composition obtained by copolymerizing N-vinylpyrrolidone, the acrylic pressure-sensitive adhesive composition containing no N-vinylpyrrolidone It was also found that the addition of polypropylene glycol improved the moisture permeability of both products.
【００４８】また、Ｎ−ビニルピロリドンを共重合させ
たアクリル系粘着剤組成物は、Ｎ−ビニルピロリドンを
含まないアクリル系粘着剤組成物より高い透湿度を有し
ている（比較例１と４参照）。このアクリル系粘着剤組
成物に更にポリプロピレングリコールを添加することに
より、極めて大きな透湿度（１０００ｇ／ｍ2 ・２４時
以上）が得られることがわかった（実施例１参照）。The acrylic pressure-sensitive adhesive composition obtained by copolymerizing N-vinylpyrrolidone has a higher moisture permeability than the acrylic pressure-sensitive adhesive composition containing no N-vinylpyrrolidone (Comparative Examples 1 and 4). reference). It was found that by adding polypropylene glycol to the acrylic pressure-sensitive adhesive composition, an extremely high moisture permeability (1000 g / m 2 · 24 hours or more) was obtained (see Example 1).
【００４９】比較例４と６によれば、Ｎ−ビニルピロリ
ドンを共重合させたアクリル系粘着剤組成物でなくて
も、Ｎ−ビニルピロリドンを含まないアクリル系粘着剤
とＮ−ビニルピロリドンを成分とした共重合体とを混合
することで透湿度をある程度向上させることができる
が、実施例１８によれば、更にポリプロピレングリコー
ルを添加することにより極めて大きな透湿度が得られる
ことがわかった。According to Comparative Examples 4 and 6, even if it is not an acrylic pressure-sensitive adhesive composition obtained by copolymerizing N-vinylpyrrolidone, an acrylic pressure-sensitive adhesive containing no N-vinylpyrrolidone and N-vinylpyrrolidone are used as components. Although the moisture permeability can be improved to some extent by mixing with the above copolymer, according to Example 18, it was found that an extremely large moisture permeability can be obtained by further adding polypropylene glycol.
【００５０】実施例１、４〜７によれば、ポリプロピレ
ングリコールの数平均分子量が１０００以下となると、
粘着剤層を剥がした時に、被着体の表面に粘着剤層が残
存している。従って、粘着剤層の残存が望ましくない分
野では、数平均分子量が２０００以上であることが好ま
しい。また、数平均分子量が４０００のポリプロピレン
グリコールを使用することにより最も好ましいアクリル
系粘着剤組成物を得ることができることがわかった。According to Examples 1, 4 to 7, when the number average molecular weight of the polypropylene glycol was 1,000 or less,
When the pressure-sensitive adhesive layer is peeled off, the pressure-sensitive adhesive layer remains on the surface of the adherend. Therefore, in a field where it is not desirable that the pressure-sensitive adhesive layer remains, the number average molecular weight is preferably 2,000 or more. It was also found that the most preferable acrylic pressure-sensitive adhesive composition can be obtained by using polypropylene glycol having a number average molecular weight of 4000.
【００５１】実施例１０〜１５によれば、粘着剤層の厚
さが１０〜４０μｍの場合が、透湿性及び剥離状況の観
点から好ましいことがわかった。実施例１〜３、比較例
１〜３によれば、コポリマーに含まれるＮ−ビニルピロ
リドン由来の成分が（メタ）アクリレート系ポリマー１
００重量部中に３〜７重量部の範囲でありかつポリプロ
ピレングリコールを含むことで、透湿性の観点において
優れた効果が得られることがわかった。According to Examples 10 to 15, it was found that the case where the thickness of the pressure-sensitive adhesive layer was 10 to 40 μm was preferable from the viewpoint of the moisture permeability and the peeling condition. According to Examples 1 to 3 and Comparative Examples 1 to 3, the component derived from N-vinylpyrrolidone contained in the copolymer is (meth) acrylate-based polymer 1
It was found that when the content was in the range of 3 to 7 parts by weight and the polypropylene glycol was contained in 00 parts by weight, an excellent effect in terms of moisture permeability was obtained.
【００５２】実施例１７〜１９、比較例５〜７によれ
ば、Ｎ−ビニルピロリドンをコポリマーとして含む場合
と比較しても、透湿性の観点においてほぼ同等の効果が
得られることがわかった。実施例２０〜２２より、加温
・加圧経日後の透湿度、粘着力及び目視による剥離状況
に実用上の問題は生じなかった。According to Examples 17 to 19 and Comparative Examples 5 to 7, it was found that almost the same effect was obtained in terms of moisture permeability as compared with the case where N-vinylpyrrolidone was contained as a copolymer. From Examples 20 to 22, practical problems did not occur in the moisture permeability, the adhesive strength, and the visual peeling state after the passage of the heating and pressurizing days.
【００５３】実施例２３ 実施例１のアクリル系粘着剤組成物に、酢酸エチル１７
５２．３重量部を加えて希釈することにより、（メタ）
アクリル系ポリマーを５重量％含む粘着剤組成物を得る
ことができた。Example 23 Ethyl acetate 17 was added to the acrylic pressure-sensitive adhesive composition of Example 1.
By adding and diluting 52.3 parts by weight, (meth)
A pressure-sensitive adhesive composition containing 5% by weight of an acrylic polymer was obtained.
【００５４】実施例２４ 実施例１のアクリル系粘着剤組成物のトルエンを１９．
７重量部に、酢酸エチルを４７．０重量部に減らすこと
以外は、実施例１と同様にして、アクリル系粘着剤組成
物を得た。このアクリル系粘着剤組成物は、（メタ）ア
クリル系ポリマーを６０重量％含んでいた。Example 24 Toluene of the acrylic pressure-sensitive adhesive composition of Example 1 was used for 19.
An acrylic pressure-sensitive adhesive composition was obtained in the same manner as in Example 1 except that ethyl acetate was reduced to 47.0 parts by weight to 7 parts by weight. The acrylic pressure-sensitive adhesive composition contained 60% by weight of the (meth) acrylic polymer.
【００５５】[0055]
【発明の効果】本発明のアクリル系粘着剤組成物によれ
ば、該アクリル系粘着剤組成物により得られる粘着剤層
の透湿度の向上させることが可能となり、例えば、医療
用テープ、絶縁用テープ、包装用テープ、マスキングテ
ープ等の用途に好適である。According to the acrylic pressure-sensitive adhesive composition of the present invention, it is possible to improve the moisture permeability of the pressure-sensitive adhesive layer obtained from the acrylic pressure-sensitive adhesive composition. It is suitable for applications such as tapes, packaging tapes and masking tapes.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ // Ｃ０８Ｆ 220/00 Ａ６１Ｌ 15/06 (Ｃ０８Ｆ 220/00 226:10） ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI // C08F 220/00 A61L 15/06 (C08F 220/00 226: 10)
Claims (16)
量％、（メタ）アクリル系ポリマー１００重量部に対し
て、ポリプロピレングリコール５〜３５重量部、任意成
分としての添加物とを含み、溶媒により全体が１００重
量％に調整されてなるアクリル系粘着剤組成物。1. A method comprising the steps of: (1) 5 to 60% by weight of a (meth) acrylic polymer, 5 to 35 parts by weight of polypropylene glycol with respect to 100 parts by weight of a (meth) acrylic polymer, and an optional additive; An acrylic pressure-sensitive adhesive composition whose total content is adjusted to 100% by weight.
ニルピロリドン由来の成分を含む請求項１の粘着剤組成
物。2. The pressure-sensitive adhesive composition according to claim 1, wherein the (meth) acrylic polymer contains a component derived from N-vinylpyrrolidone.
６０００の数平均分子量を有する請求項１又は２の粘着
剤組成物。3. The method according to claim 1, wherein the polypropylene glycol is 400 to
3. The pressure-sensitive adhesive composition according to claim 1, having a number average molecular weight of 6,000.
〜４０００の数平均分子量を有する請求項３の粘着剤組
成物。4. The method according to claim 1, wherein the polypropylene glycol is 2,000.
The pressure-sensitive adhesive composition according to claim 3, which has a number average molecular weight of 4,000 to 4,000.
アクリル系ポリマー１００重量部に対して、１０〜２５
重量部含まれる請求項１〜４いずれか１つの粘着剤組成
物。5. The method according to claim 1, wherein the polypropylene glycol is (meth)
10 to 25 with respect to 100 parts by weight of the acrylic polymer
The pressure-sensitive adhesive composition according to any one of claims 1 to 4, which is contained in parts by weight.
（メタ）アクリル系ポリマー１００重量部中に１〜１０
重量部含まれる請求項２の粘着剤組成物。6. The component derived from N-vinylpyrrolidone,
1 to 10 in 100 parts by weight of the (meth) acrylic polymer
The pressure-sensitive adhesive composition according to claim 2, which is contained in parts by weight.
（メタ）アクリル系ポリマー１００重量部中に３〜８重
量部含まれる請求項６の粘着剤組成物。7. A component derived from N-vinylpyrrolidone,
The pressure-sensitive adhesive composition according to claim 6, which is contained in an amount of 3 to 8 parts by weight based on 100 parts by weight of the (meth) acrylic polymer.
剤層の形成に使用され、（メタ）アクリル系ポリマーが
５〜２０重量％含まれる請求項１〜７いずれか１つの粘
着剤組成物。8. The pressure-sensitive adhesive composition according to claim 1, wherein the pressure-sensitive adhesive composition is used for forming a pressure-sensitive adhesive layer of a masking tape, and contains a (meth) acrylic polymer in an amount of 5 to 20% by weight.
形成に使用され、（メタ）アクリル系ポリマーが４０〜
６０重量％含まれる請求項１〜７いずれか１つの粘着剤
組成物。9. The pressure-sensitive adhesive composition is used for forming a pressure-sensitive adhesive layer of a double-sided tape, and the (meth) acrylic polymer is 40 to 90%.
The pressure-sensitive adhesive composition according to any one of claims 1 to 7, which is contained in an amount of 60% by weight.
層の形成に使用され、（メタ）アクリル系ポリマーが３
０〜６０重量％含まれる請求項１〜７いずれか１つの粘
着剤組成物。10. The pressure-sensitive adhesive composition is used for forming a pressure-sensitive adhesive layer of a medical tape, and the (meth) acryl-based polymer contains 3
The pressure-sensitive adhesive composition according to any one of claims 1 to 7, which is contained in an amount of 0 to 60% by weight.
のアクリル系粘着剤組成物からなる粘着剤層が形成され
てなる粘着テープ。11. A pressure-sensitive adhesive tape comprising a substrate and a pressure-sensitive adhesive layer comprising the acrylic pressure-sensitive adhesive composition according to any one of claims 1 to 10 formed thereon.
する請求項１１のテープ。12. The tape according to claim 11, wherein the pressure-sensitive adhesive layer has a thickness of 10 to 40 μm.
着剤層が２５〜３５μｍの厚さを有する請求項１２のテ
ープ。13. The tape according to claim 12, wherein the adhesive tape is a medical tape, and the adhesive layer has a thickness of 25 to 35 μm.
間以上の透湿度を有する請求項１１〜１３いずれか１つ
のテープ。14. The tape according to claim 11, wherein the pressure-sensitive adhesive layer has a moisture permeability of 1000 g / m 2 · 24 hours or more.
量部に対して、ポリプロピレングリコールを５〜３５重
量部添加することにより、形成される粘着剤層の透湿度
を実質的に上昇させることからなる改良された透湿度を
有する粘着剤層の形成方法。15. An improvement comprising substantially increasing the moisture permeability of the formed pressure-sensitive adhesive layer by adding 5-35 parts by weight of polypropylene glycol to 100 parts by weight of the (meth) acrylic polymer. For forming a pressure-sensitive adhesive layer having reduced moisture permeability.
ビニルピロリドン由来の成分を含む請求項１５の形成方
法。16. The method according to claim 16, wherein the (meth) acrylic polymer is N-
16. The method of claim 15, comprising a component derived from vinylpyrrolidone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20956098A JP3935619B2 (en) | 1997-08-08 | 1998-07-24 | Adhesive tape |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9-214825 | 1997-08-08 | ||
| JP21482597 | 1997-08-08 | ||
| JP20956098A JP3935619B2 (en) | 1997-08-08 | 1998-07-24 | Adhesive tape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11116927A true JPH11116927A (en) | 1999-04-27 |
| JP3935619B2 JP3935619B2 (en) | 2007-06-27 |
Family
ID=26517530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20956098A Expired - Fee Related JP3935619B2 (en) | 1997-08-08 | 1998-07-24 | Adhesive tape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3935619B2 (en) |
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| JP2004160211A (en) * | 2002-10-21 | 2004-06-10 | Sekisui Chem Co Ltd | Air-permeable pressure sensitive self-adhesive tape |
| JP2006055411A (en) * | 2004-08-20 | 2006-03-02 | Nichiban Co Ltd | Rubber adhesive composition to be stuck to skin, and adhesive tape or sheet |
| JP2006096776A (en) * | 2003-09-10 | 2006-04-13 | Sumitomo Chemical Co Ltd | Acrylic resin composition |
| WO2010098291A1 (en) | 2009-02-26 | 2010-09-02 | 日東電工株式会社 | Adhesive composition for use in surface protective film and use thereof |
| WO2011132566A1 (en) * | 2010-04-20 | 2011-10-27 | 日東電工株式会社 | Removable water-dispersing acrylic adhesive composition and adhesive sheet |
| JP2011225732A (en) * | 2010-04-20 | 2011-11-10 | Nitto Denko Corp | Removable water-dispersing acrylic adhesive composition and adhesive sheet |
| JP2012525474A (en) * | 2009-04-28 | 2012-10-22 | スリーエム イノベイティブ プロパティズ カンパニー | Water-soluble pressure sensitive adhesive |
| US8685535B2 (en) | 2010-02-22 | 2014-04-01 | Nitto Denko Corporation | Surface protective film |
| KR20150009927A (en) | 2013-07-17 | 2015-01-27 | 닛토덴코 가부시키가이샤 | Removable water-dispersible pressure-sensitive adhesive composition, pressure-sensitive adhesive sheet and optical component |
| WO2015167132A1 (en) * | 2014-04-30 | 2015-11-05 | 동우화인켐 주식회사 | Antistatic adhesive composition and polarizing plate manufactured using same |
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| JP2006055411A (en) * | 2004-08-20 | 2006-03-02 | Nichiban Co Ltd | Rubber adhesive composition to be stuck to skin, and adhesive tape or sheet |
| WO2010098291A1 (en) | 2009-02-26 | 2010-09-02 | 日東電工株式会社 | Adhesive composition for use in surface protective film and use thereof |
| JP2012525474A (en) * | 2009-04-28 | 2012-10-22 | スリーエム イノベイティブ プロパティズ カンパニー | Water-soluble pressure sensitive adhesive |
| US8685535B2 (en) | 2010-02-22 | 2014-04-01 | Nitto Denko Corporation | Surface protective film |
| WO2011132566A1 (en) * | 2010-04-20 | 2011-10-27 | 日東電工株式会社 | Removable water-dispersing acrylic adhesive composition and adhesive sheet |
| JP2011225732A (en) * | 2010-04-20 | 2011-11-10 | Nitto Denko Corp | Removable water-dispersing acrylic adhesive composition and adhesive sheet |
| KR20150009927A (en) | 2013-07-17 | 2015-01-27 | 닛토덴코 가부시키가이샤 | Removable water-dispersible pressure-sensitive adhesive composition, pressure-sensitive adhesive sheet and optical component |
| WO2015167132A1 (en) * | 2014-04-30 | 2015-11-05 | 동우화인켐 주식회사 | Antistatic adhesive composition and polarizing plate manufactured using same |
| WO2016105101A1 (en) * | 2014-12-24 | 2016-06-30 | (주)엘지하우시스 | Acrylic adhesive sheet, medical adhesive tape, and method for manufacturing same |
| US11136478B2 (en) | 2014-12-24 | 2021-10-05 | Lg Chem, Ltd. | Acrylic adhesive sheet, medical adhesive tape, and method for manufacturing the same |
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|---|---|
| JP3935619B2 (en) | 2007-06-27 |
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