JPH11256125A - Water-dispersion type pressure sensitive adhesive for re-peeling - Google Patents
Water-dispersion type pressure sensitive adhesive for re-peelingInfo
- Publication number
- JPH11256125A JPH11256125A JP5506698A JP5506698A JPH11256125A JP H11256125 A JPH11256125 A JP H11256125A JP 5506698 A JP5506698 A JP 5506698A JP 5506698 A JP5506698 A JP 5506698A JP H11256125 A JPH11256125 A JP H11256125A
- Authority
- JP
- Japan
- Prior art keywords
- monomer
- sensitive adhesive
- water
- meth
- phase
- 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
Links
Landscapes
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、マスキング用感圧
性接着シ―ト類などに用いられる、再剥離用水分散型感
圧性接着剤に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a removable water-dispersible pressure-sensitive adhesive for use in pressure-sensitive adhesive sheets for masking.
【0002】[0002]
【従来の技術】マスキング用感圧性接着シ―ト類(シ―
ト、テ―プなど)は、加熱により接着力が上昇しないこ
と、剥離後に被着体への糊残り、シ―ト(テ―プ)跡、
被着体の変色などがないことが、重要な要求特性となつ
ている。2. Description of the Related Art Pressure-sensitive adhesive sheets for masking (sheets)
(Tape, tape, etc.) is that the adhesive strength does not increase by heating, glue remains on the adherend after peeling, sheet (tape) marks,
The absence of discoloration of the adherend is an important required characteristic.
【0003】これらの特性を改良するために、たとえ
ば、特開平6−346038号公報では、特定のモノマ
―および乳化剤組成により、低温から高温までの広い温
度範囲において各種の被着体に対して良好な再剥離性を
示す水系再剥離型感圧性接着剤が開示されている。しか
しながら、この公報の実施例に示されている方法では、
加熱直後に剥離すると、凝集破壊するという問題があつ
た。In order to improve these characteristics, for example, Japanese Patent Application Laid-Open No. Hei 6-346038 discloses that a specific monomer and emulsifier composition can be applied to various adherends in a wide temperature range from a low temperature to a high temperature. A water-based re-peelable pressure-sensitive adhesive exhibiting excellent re-peelability is disclosed. However, in the method described in the example of this publication,
When peeled immediately after heating, there was a problem of cohesive failure.
【0004】また、特開平6−322345号公報に
は、特定の酸素濃度条件下でレドツクス系重合開始剤を
用いて重合を行うことにより、各種被着体に対して良好
な再剥離性を示す感圧性接着剤が開示されている。とこ
ろが、この感圧性接着剤では、自背面に対する固定性が
悪いという問題があつた。Japanese Patent Application Laid-Open No. Hei 6-322345 discloses that various types of adherends exhibit good removability by performing polymerization using a redox polymerization initiator under a specific oxygen concentration condition. A pressure-sensitive adhesive is disclosed. However, this pressure-sensitive adhesive has a problem that its fixability to its own back surface is poor.
【0005】マスキング用途において、幅の広いマスキ
ング領域を必要とする場合、複数枚の感圧性接着シ―ト
類を重ねばりし、継ぎ合わせることがある。この場合、
先に被着体に貼り付けた感圧性接着シ―ト類の背面の一
部分に別の感圧性接着シ―ト類を重ねばりするため、こ
の重ねばり領域から塗料の進入などの不具合を防止する
必要があり、この領域における密着性が強く要求され
る。すなわち、先に被着体に貼り付けた感圧性接着シ―
ト類の背面に重ねばりする感圧性接着シ―ト類の固定
性、つまり自背面固定性が高いことが求められる。When a wide masking area is required for masking applications, a plurality of pressure-sensitive adhesive sheets may be overlapped and spliced. in this case,
Since another pressure-sensitive adhesive sheet is stacked on a part of the back surface of the pressure-sensitive adhesive sheet previously attached to the adherend, problems such as intrusion of paint from the overlapping area are prevented. And adhesiveness in this region is strongly required. In other words, the pressure-sensitive adhesive sheet that was previously attached to the adherend
It is required that the pressure-sensitive adhesive sheets to be stacked on the back surface of the papers have high fixability, that is, high self-backing property.
【0006】[0006]
【発明が解決しようとする課題】本発明は、上記の事情
に照らし、自背面固定性にすぐれ、かつ被着体への貼り
付け後高温雰囲気下に晒されたのちでも凝集破壊を起こ
すことなく被着体表面から容易に剥離できるマスキング
用感圧性接着シ―ト類などとして有用な再剥離用水分散
型感圧性接着剤を提供することを目的としている。DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and has excellent self-rear surface fixing properties and does not cause cohesive failure even after being exposed to a high-temperature atmosphere after being attached to an adherend. An object of the present invention is to provide a water-dispersible pressure-sensitive adhesive for re-peeling, which is useful as a pressure-sensitive adhesive sheet for masking that can be easily peeled off from the surface of an adherend.
【0007】[0007]
【課題を解決するための手段】本発明者らは、上記の目
的を達成するために、鋭意検討した結果、アクリル系単
量体の乳化重合に際し、単量体組成の異なる2相構成の
重合体粒子を生成するか、または単量体組成の異なる2
種の重合体粒子を生成してこれをブレンドすることによ
り、とくに上記異なる単量体組成として、一方がカルボ
キシル基含有単量体を含み、他方がカルボキシル基含有
単量体およびカルボキシル基と反応する官能性単量体を
含まない構成とすることにより、自背面固定性にすぐ
れ、かつ耐熱性にもすぐれて、被着体への貼り付け後高
温雰囲気下に晒されたのちでも凝集破壊を起こすことな
く被着体表面から容易に剥離しうるマスキング用感圧性
接着シ―ト類を製造できることを知り、本発明を完成す
るに至つた。Means for Solving the Problems The present inventors have conducted intensive studies in order to achieve the above object, and as a result, have found that when emulsion polymerization of an acrylic monomer is carried out, a two-phase composition having different monomer compositions is used. To form coalesced particles, or 2
By producing and blending seed polymer particles, one containing a carboxyl group-containing monomer and the other reacting with a carboxyl group-containing monomer and a carboxyl group, particularly as the different monomer composition described above. By having a structure that does not contain a functional monomer, it has excellent self-retaining property and heat resistance, and causes cohesive failure even after being exposed to a high-temperature atmosphere after being attached to an adherend. The present inventors have found that pressure-sensitive adhesive sheets for masking that can be easily peeled off from the surface of an adherend can be produced without any need, and have completed the present invention.
【0008】すなわち、本発明は、水中に乳化分散する
重合体粒子が、A)アルキル基の炭素数が4〜12の
(メタ)アクリル酸アルキルエステルを主成分とし、か
つカルボキシル基含有単量体を含む単量体混合物の共重
合体からなる相と、B)アルキル基の炭素数が4〜12
の(メタ)アクリル酸アルキルエステルを主成分とし、
かつカルボキシル基含有単量体およびカルボキシル基と
反応する官能性単量体を含まない単量体の重合体からな
る相との2相構成とされていることを特徴とする再剥離
用水分散型感圧性接着剤(請求項1)、とくに重合体粒
子を構成するA相が50〜90重量%、B相が50〜1
0重量%である上記構成の再剥離用水分散型感圧性接着
剤(請求項2)に係るものである。That is, according to the present invention, the polymer particles emulsified and dispersed in water are: A) a (meth) acrylic acid alkyl ester having an alkyl group having 4 to 12 carbon atoms as a main component, and a carboxyl group-containing monomer; And B) an alkyl group having 4 to 12 carbon atoms.
(Meth) acrylic acid alkyl ester as a main component,
And a two-phase structure comprising a phase of a polymer of a monomer containing a carboxyl group-containing monomer and a functional monomer that does not react with a carboxyl group. The pressure-sensitive adhesive (Claim 1), especially 50 to 90% by weight of the A phase constituting the polymer particles and 50 to 1% by weight of the B phase.
The present invention relates to the water-dispersible pressure-sensitive adhesive for re-peeling having the above constitution, which is 0% by weight (claim 2).
【0009】また、本発明は、水中に乳化分散する重合
体粒子が、a)アルキル基の炭素数が4〜12の(メ
タ)アクリル酸アルキルエステルを主成分とし、かつカ
ルボキシル基含有単量体を含む単量体混合物の共重合体
からなる粒子と、b)アルキル基の炭素数が4〜12の
(メタ)アクリル酸アルキルエステルを主成分とし、か
つカルボキシル基含有単量体およびカルボキシル基と反
応する官能性単量体を含まない単量体の重合体からなる
粒子との2種の重合体粒子で構成されていることを特徴
とする再剥離用水分散型感圧性接着剤(請求項3)、と
くに重合体粒子を構成するa粒子が50〜90重量%、
b粒子が50〜10重量%である上記構成の再剥離用水
分散型感圧性接着剤(請求項4)に係るものである。Further, according to the present invention, there is provided a polymer particle emulsified and dispersed in water comprising: a) a (meth) acrylic acid alkyl ester having an alkyl group having 4 to 12 carbon atoms as a main component; And b) a (meth) acrylic acid alkyl ester having 4 to 12 carbon atoms in the alkyl group as a main component, and a carboxyl group-containing monomer and a carboxyl group. 2. A water-dispersible pressure-sensitive adhesive for re-peeling, comprising two types of polymer particles comprising a polymer particle of a monomer not containing a reactive functional monomer. ), Especially 50 to 90% by weight of the a particles constituting the polymer particles;
The present invention relates to the water-dispersible pressure-sensitive adhesive for re-peeling of the above constitution, wherein the b particles are 50 to 10% by weight (claim 4).
【0010】[0010]
【発明の実施の形態】本発明の再剥離用水分散型感圧性
接着剤のひとつは、水中に乳化分散する重合体粒子が、
A)アルキル基の炭素数が4〜12の(メタ)アクリル
酸アルキルエステルを主成分とし、かつカルボキシル基
含有単量体を含む単量体混合物の共重合体からなる相
と、B)アルキル基の炭素数が4〜12の(メタ)アク
リル酸アルキルエステルを主成分とし、かつカルボキシ
ル基含有単量体およびカルボキシル基と反応する官能性
単量体を含まない単量体の重合体からなる相との2相構
成とされたものである。ここで、良好な再剥離性を得る
ために、重合体粒子を構成するA相は50〜90重量
%、好ましくは60〜80重量%であり、B相は50〜
10重量%、好ましくは40〜20重量%であるのがよ
い。BEST MODE FOR CARRYING OUT THE INVENTION One of the water-dispersible pressure-sensitive adhesives for re-peeling according to the present invention comprises polymer particles emulsified and dispersed in water.
A) a phase comprising a copolymer of a monomer mixture containing (meth) acrylic acid alkyl ester having 4 to 12 carbon atoms as a main component and containing a carboxyl group-containing monomer; and B) an alkyl group. Consisting of a polymer of a monomer having an alkyl (meth) acrylate having 4 to 12 carbon atoms as a main component and not containing a carboxyl group-containing monomer and a functional monomer that reacts with a carboxyl group. In a two-phase configuration. Here, in order to obtain good removability, the phase A constituting the polymer particles is 50 to 90% by weight, preferably 60 to 80% by weight, and the phase B is 50 to 90% by weight.
The content is 10% by weight, preferably 40 to 20% by weight.
【0011】A相を構成する単量体混合物において、ア
ルキル基の炭素数が4〜12の(メタ)アクリル酸アル
キルエステルとしては、たとえば、(メタ)アクリル酸
ブチル、(メタ)アクリル酸2−エチルヘキシル、(メ
タ)アクリル酸イソノニル、(メタ)アクリル酸イソオ
クチル、(メタ)アクリル酸ラウリルなどが挙げられ
る。また、カルボキシル基含有単量体としては、無水マ
レイン酸、(メタ)アクリル酸、イタコン酸などを挙げ
ることができる。In the monomer mixture constituting the phase A, examples of the alkyl (meth) acrylate having an alkyl group of 4 to 12 carbon atoms include butyl (meth) acrylate and 2- (meth) acrylate. Examples include ethylhexyl, isononyl (meth) acrylate, isooctyl (meth) acrylate, and lauryl (meth) acrylate. Examples of the carboxyl group-containing monomer include maleic anhydride, (meth) acrylic acid, and itaconic acid.
【0012】これらの成分のほか、メタクリル酸メチ
ル、アクリル酸エチル、アクリル酸イソプロピルなどの
アルキル基の炭素数が1〜3の(メタ)アクリル酸アル
キルエステル、メタクリル酸トリデシル、(メタ)アク
リル酸ステアリルなどのアルキル基の炭素数が13〜1
8の(メタ)アクリル酸アルキルエステル、(メタ)ア
クリル酸ヒドロキシアルキル、グリセリンジ(メタ)ア
クリレ―トなどの水酸基含有単量体、酢酸ビニル、スチ
レン、(メタ)アクリロニトリル、N−ビニルピロリド
ン、(メタ)アクリロイルモルホリン、シクロヘキシル
マレイミド、イソプロピルマレイミド、(メタ)アクリ
ルアミド、N,N−ジメチル(メタ)アクリルアミド、
(メタ)アクリル酸グリシジルなどを使用してもよい。In addition to these components, alkyl (meth) acrylates having an alkyl group having 1 to 3 carbon atoms, such as methyl methacrylate, ethyl acrylate and isopropyl acrylate, tridecyl methacrylate, stearyl (meth) acrylate Such as an alkyl group having 13 to 1 carbon atoms
8, hydroxyalkyl (meth) acrylates, hydroxyalkyl (meth) acrylates, hydroxyl-containing monomers such as glycerin di (meth) acrylate, vinyl acetate, styrene, (meth) acrylonitrile, N-vinylpyrrolidone, (Meth) acryloylmorpholine, cyclohexylmaleimide, isopropylmaleimide, (meth) acrylamide, N, N-dimethyl (meth) acrylamide,
Glycidyl (meth) acrylate may be used.
【0013】A相を構成する単量体混合物において、ア
ルキル基の炭素数が4〜12の(メタ)アクリル酸アル
キルエステル、カルボキシル基含有単量体およびこれら
以外の前記単量体は、共重合体のガラス転移点が通常−
20℃以下となるように、各使用量が決められる。アル
キル基の炭素数が4〜12の(メタ)アクリル酸アルキ
ルエステルは、主成分として、全単量体の50重量%以
上の割合で用いられ、またカルボキシル基含有単量体
は、全単量体中、0.5〜5重量%の割合で用いられ
る。これらの範囲外となると、感圧接着性、自背面固定
性および再剥離性(耐熱性)などのいずれかの特性に好
結果が得られにくい。In the monomer mixture constituting the phase A, the alkyl (meth) acrylate having 4 to 12 carbon atoms in the alkyl group, the carboxyl group-containing monomer and the other monomers are copolymerized. The glass transition point of the coalescence is usually −
Each usage amount is determined so as to be 20 ° C. or lower. The alkyl (meth) acrylate having 4 to 12 carbon atoms in the alkyl group is used as a main component in a proportion of 50% by weight or more of all monomers, and the carboxyl group-containing monomer is used as a whole monomer. It is used at a ratio of 0.5 to 5% by weight in the body. Outside these ranges, good results are unlikely to be obtained in any of the properties such as pressure-sensitive adhesiveness, self-retaining property and removability (heat resistance).
【0014】また、B相を構成する単量体において、ア
ルキル基の炭素数が4〜12の(メタ)アクリル酸アル
キルエステルとしては、上記A相におけるアルキル基の
炭素数が4〜12の(メタ)アクリル酸アルキルエステ
ルと同様のものを使用でき、主成分として、全単量体の
50重量%以上の割合で用いられる。この主成分ととも
に、他の単量体を併用してもよいが、カルボキシル基含
有単量体およびカルボキシル基と反応する官能性単量体
は併用できない。これらを併用すると、再剥離性(耐熱
性)に問題を生じやすく、また自背面固定性と再剥離性
との両立ができなくなるためである。In the monomer constituting the phase B, the alkyl (meth) acrylate having an alkyl group having 4 to 12 carbon atoms may be an alkyl (meth) acrylate having 4 to 12 carbon atoms in the phase A. The same ones as the alkyl (meth) acrylate can be used, and they are used as a main component in a proportion of 50% by weight or more of all monomers. Other monomers may be used together with this main component, but a carboxyl group-containing monomer and a functional monomer that reacts with a carboxyl group cannot be used together. If these are used together, a problem is likely to occur in removability (heat resistance), and it is impossible to achieve both self-rear surface fixability and removability.
【0015】上記併用できないカルボキシル基含有単量
体としては、無水マレイン酸、(メタ)アクリル酸、イ
タコン酸などがある。また、上記併用できないカルボキ
シル基と反応する官能性単量体としては、(メタ)アク
リル酸ヒドロキシアルキル、グリセリンジメタクリレ―
トなどの水酸基含有単量体、N−ビニルピロリドン、
(メタ)アクリロイルモルホリン、シクロヘキシルマレ
イミド、イソプロピルマレイミド、(メタ)アクリルア
ミド、N,N−ジメチル(メタ)アクリルアミド、(メ
タ)アクリル酸グリシジルなどが挙げられる。Examples of the carboxyl group-containing monomer which cannot be used in combination include maleic anhydride, (meth) acrylic acid, and itaconic acid. Examples of the functional monomer that reacts with a carboxyl group that cannot be used in combination include hydroxyalkyl (meth) acrylate and glycerin dimethacrylate.
Hydroxyl-containing monomers such as N-vinylpyrrolidone,
(Meth) acryloylmorpholine, cyclohexylmaleimide, isopropylmaleimide, (meth) acrylamide, N, N-dimethyl (meth) acrylamide, glycidyl (meth) acrylate, and the like.
【0016】併用可能な単量体には、メタクリル酸メチ
ル、アクリル酸エチル、アクリル酸イソプロピルなどの
アルキル基の炭素数が1〜3の(メタ)アクリル酸アル
キルエステル、メタクリル酸トリデシル、(メタ)アク
リル酸ステアリルなどのアルキル基の炭素数が13〜1
8の(メタ)アクリル酸アルキルエステル、酢酸ビニ
ル、スチレン、(メタ)アクリロニトリルなどがある。
これらは、重合体のガラス転移点が通常−20℃以下と
なるように、その使用量が決められる。The monomers which can be used in combination include alkyl (meth) acrylates having an alkyl group having 1 to 3 carbon atoms, such as methyl methacrylate, ethyl acrylate and isopropyl acrylate, tridecyl methacrylate, and (meth) The alkyl group such as stearyl acrylate has 13 to 1 carbon atoms.
And (8) alkyl (meth) acrylate, vinyl acetate, styrene, (meth) acrylonitrile and the like.
These are used in such an amount that the glass transition point of the polymer is usually -20 ° C or lower.
【0017】本発明においては、通常、まず、上記A相
を構成する単量体混合物を乳化重合し、ついで、その重
合系内に上記B相を構成する単量体を加えて乳化重合す
る、2段階重合法により、水中に上記A相とB相との2
相構成の重合体粒子が乳化分散した水分散液からなる再
剥離用水分散型感圧性接着剤を得る。ここで、上記A相
を構成する単量体混合物と、B相を構成する単量体と
は、A相およびB相の重量比率が前記範囲となるよう
に、上記A相を構成する単量体混合物が50〜90重量
%、好ましくは60〜80重量%、上記B相を構成する
単量体が50〜10重量%、好ましくは40〜20重量
%となる割合で用いられる。In the present invention, usually, first, the monomer mixture constituting the phase A is emulsion-polymerized, and then the monomer constituting the phase B is added to the polymerization system and emulsion-polymerized. By a two-stage polymerization method, two phases of the above-mentioned phase A and phase B
A water-dispersible pressure-sensitive adhesive for re-peeling comprising an aqueous dispersion in which polymer particles having a phase constitution are emulsified and dispersed is obtained. Here, the monomer mixture constituting the A phase and the monomer constituting the B phase are mixed with each other so that the weight ratio of the A phase and the B phase is within the above range. The body mixture is used in a proportion of 50 to 90% by weight, preferably 60 to 80% by weight, and the monomer constituting the B phase is used in a proportion of 50 to 10% by weight, preferably 40 to 20% by weight.
【0018】上記の乳化重合に際し、重合開始剤とし
て、2,2´−アゾビス(2−メチルプロピオンアミジ
ン)二硫酸塩、2,2´−アゾビス(2−アミジノプロ
パン)ジヒドロクロライドなどのアゾ系、過硫酸カリウ
ム、過硫酸アンモニウムなどの過硫酸塩、ベンゾイルパ
―オキサイド、t−ブチルハイドロパ―オキサイド、過
酸化水素などの過酸化物、過硫酸塩と亜硫酸水素ナトリ
ウムとの組み合わせや過酸化物とアスコルビン酸ナトリ
ウムとの組み合わせなどからなるレドツクス開始剤が用
いられる。これらの重合開始剤は、通常は、乳化重合の
各段階ごとに、所定量を添加して、重合反応を行わせる
ようにすればよい。In the above emulsion polymerization, azo-based compounds such as 2,2'-azobis (2-methylpropionamidine) disulfate and 2,2'-azobis (2-amidinopropane) dihydrochloride are used as polymerization initiators. Persulfates such as potassium persulfate and ammonium persulfate; peroxides such as benzoyl peroxide, t-butyl hydroperoxide and hydrogen peroxide; combinations of persulfate and sodium bisulfite; and peroxide and ascorbic acid A redox initiator consisting of a combination with sodium or the like is used. Usually, a predetermined amount of these polymerization initiators may be added at each stage of the emulsion polymerization so as to cause the polymerization reaction.
【0019】また、上記の乳化重合に際し、重合安定性
を確保するため、アニオン系やノニオン系の乳化剤が適
量用いられる。アニオン系としては、ラウリル硫酸ナト
リウム、ラウリル硫酸アンモニウム、ドデシルベンゼン
スルホン酸ナトリウム、ポリオキシエチレンアルキルエ
―テル硫酸ナトリウム、ポリオキシエチレンアルキルフ
エニルエ―テル硫酸ナトリウムなどが、ノニオン系とし
ては、ポリオキシエチレンアルキルエ―テル、ポリオキ
シエチレンアルキルフエニルエ―テルなどが挙げられ
る。また、アニオン系およびノニオン系のいずれにおい
ても、たとえばプロペニル基などを導入したラジカル重
合性の乳化剤を用いてもよい。In the above emulsion polymerization, an appropriate amount of an anionic or nonionic emulsifier is used in order to secure polymerization stability. Examples of the anionic type include sodium lauryl sulfate, ammonium lauryl sulfate, sodium dodecylbenzenesulfonate, sodium polyoxyethylene alkyl ether sulfate, and sodium polyoxyethylene alkyl phenyl ether sulfate. Examples thereof include an alkyl ether and a polyoxyethylene alkylphenyl ether. In both anionic and nonionic types, a radically polymerizable emulsifier having a propenyl group or the like may be used.
【0020】本発明の再剥離用水分散型感圧性接着剤の
もうひとつは、水中に乳化分散する重合体粒子が、a)
アルキル基の炭素数が4〜12の(メタ)アクリル酸ア
ルキルエステルを主成分とし、かつカルボキシル基含有
単量体を含む単量体混合物の共重合体からなる粒子と、
b)アルキル基の炭素数が4〜12の(メタ)アクリル
酸アルキルエステルを主成分とし、かつカルボキシル基
含有単量体およびカルボキシル基と反応する官能性単量
体を含まない単量体の重合体からなる粒子との2種の重
合体粒子で構成されたものである。ここで、良好な再剥
離性を得るために、a粒子は50〜90重量%、好まし
くは60〜80重量%であり、b粒子は50〜10重量
%、好ましくは40〜20重量%であるのがよい。Another one of the water-dispersible pressure-sensitive adhesives for re-peeling according to the present invention comprises a) polymer particles which are emulsified and dispersed in water;
Particles composed of a copolymer of a monomer mixture containing a (meth) acrylic acid alkyl ester having 4 to 12 carbon atoms as a main component and a carboxyl group-containing monomer,
b) The weight of a monomer containing an alkyl (meth) acrylate having 4 to 12 carbon atoms in the alkyl group as a main component and not containing a carboxyl group-containing monomer and a functional monomer that reacts with the carboxyl group. It is composed of two types of polymer particles, namely, particles composed of coalesced particles. Here, in order to obtain good removability, a particles are 50 to 90% by weight, preferably 60 to 80% by weight, and b particles are 50 to 10% by weight, preferably 40 to 20% by weight. Is good.
【0021】この再剥離用水分散型感圧性接着剤は、上
記a粒子を構成する単量体混合物を乳化重合して、水中
に上記a粒子が乳化分散した水分散液を得、これとは別
に、上記b粒子を構成する単量体を乳化重合して、水中
に上記b粒子が乳化分散した水分散液を得、この両水分
散液をa,b両粒子の重量比率が前記範囲となるように
ブレンドすることにより、調製することができる。この
場合に、a粒子を構成する単量体混合物としては、前記
A相を構成する単量体混合物と同様のものが用いられ
る。また、b粒子を構成する単量体としては、前記B相
を構成する単量体と同様のものが用いられる。重合開始
剤および乳化剤についても、前記2段階重合の場合と同
様のものを使用できる。The water-dispersible pressure-sensitive adhesive for re-peeling is obtained by emulsion polymerization of the monomer mixture constituting the above-mentioned a particles to obtain an aqueous dispersion in which the above-mentioned a particles are emulsified and dispersed in water. The monomer constituting the b particles is emulsion-polymerized to obtain an aqueous dispersion in which the b particles are emulsified and dispersed in water, and the weight ratio of both the aqueous dispersions to both the a and b particles is within the above range. Can be prepared by blending as follows. In this case, as the monomer mixture constituting the a particles, the same as the monomer mixture constituting the A phase is used. As the monomer constituting the b particles, the same monomer as the monomer constituting the B phase is used. As for the polymerization initiator and the emulsifier, the same ones as in the case of the two-stage polymerization can be used.
【0022】本発明の再剥離用水分散型感圧性接着剤
は、上記のように調製されるA相とBとの2相構成の重
合体粒子を含む水分散液、あるいはa粒子とb粒子との
2種の重合体粒子を含む水分散液のいずれのタイプにお
いても、その水分散液中に、必要により、各種の添加
剤、たとえば、粘着付与樹脂、架橋剤、可塑剤、軟化
剤、充填剤、顔料、染料、老化防止剤などを配合するこ
とができる。The removable water-dispersible pressure-sensitive adhesive of the present invention comprises an aqueous dispersion containing two-phase polymer particles of A phase and B prepared as described above, or a particle and b particle. In any type of the aqueous dispersion containing the two kinds of polymer particles, various additives such as a tackifying resin, a cross-linking agent, a plasticizer, a softener, and a filler may be added to the aqueous dispersion as necessary. Agents, pigments, dyes, antioxidants, and the like.
【0023】本発明の再剥離用水分散型感圧性接着剤
は、通常の感圧性接着シ―ト類の製造方法にしたがつ
て、プラスチツクフイルム、紙、金属箔などの適宜の支
持体上に直接塗工、乾燥することにより、あるいはセパ
レ―タ上に塗工、乾燥したのち、適宜の支持体上に転写
することにより、シ―ト状やテ―プ状などの形態とされ
た再剥離用感圧性接着シ―ト類とすることができる。The water-dispersible pressure-sensitive adhesive for re-peeling of the present invention can be directly applied to a suitable support such as plastic film, paper, metal foil, etc., according to the usual method for producing pressure-sensitive adhesive sheets. For re-peeling in sheet or tape form by coating and drying, or by coating and drying on a separator and then transferring it to an appropriate support It can be pressure-sensitive adhesive sheets.
【0024】[0024]
【実施例】つぎに、本発明の実施例を記載して、より具
体的に説明する。なお、本発明は以下の実施例にのみ限
定されるものではない。また、以下において、部とある
のは、すべて重量部を意味するものである。Next, an embodiment of the present invention will be described in more detail. Note that the present invention is not limited only to the following examples. In the following, all parts are parts by weight.
【0025】実施例1 温度計、攪拌機、窒素導入管および還流冷却管を備えた
反応器に、アクリル酸2−エチルヘキシル69部、メタ
クリル酸1部、ラウリル硫酸ナトリウム2部を水123
部で乳化したものを入れ、攪拌しながら1時間窒素置換
した。2,2−アゾビス(2−メチルプロピオンアミジ
ン)二硫酸塩0.02部を加えて、重合温度50℃の条
件下で5時間乳化重合した。その後、アクリル酸ブチル
30部を加え、十分攪拌したのち、再び2,2−アゾビ
ス(2−メチルプロピオンアミジン)二硫酸塩0.01
部を加えて、重合温度50℃の条件下でさらに3時間乳
化重合した。10重量%アンモニア水で中和して、2相
構成の重合体粒子を含む水分散液を得た。この水分散液
に、その固形分100部に対して、エポキシ系架橋剤
0.1部、ロジンフエノ―ル系タツキフアイヤ(軟化点
125℃)乳濁液15部を加え、よく混合して、再剥離
用水分散型感圧性接着剤を調製した。Example 1 In a reactor equipped with a thermometer, a stirrer, a nitrogen inlet tube and a reflux condenser, 69 parts of 2-ethylhexyl acrylate, 1 part of methacrylic acid and 2 parts of sodium lauryl sulfate were added to water 123.
The mixture emulsified in the above portion was added, and the atmosphere was replaced with nitrogen for 1 hour while stirring. 0.02 parts of 2,2-azobis (2-methylpropionamidine) disulfate was added, and emulsion polymerization was carried out at a polymerization temperature of 50 ° C. for 5 hours. Thereafter, 30 parts of butyl acrylate was added, and the mixture was sufficiently stirred. Then, 2,2-azobis (2-methylpropionamidine) disulfate 0.01 parts was added again.
Then, emulsion polymerization was carried out at a polymerization temperature of 50 ° C. for 3 hours. It was neutralized with 10% by weight aqueous ammonia to obtain an aqueous dispersion containing polymer particles having a two-phase structure. To this aqueous dispersion, 0.1 part of an epoxy-based crosslinking agent and 15 parts of a rosin phenol-based tackifier (softening point of 125 ° C.) emulsion were added to 100 parts of the solid content, mixed well, and removed again. An aqueous dispersion type pressure-sensitive adhesive for use was prepared.
【0026】つぎに、坪量30g/m2の和紙の片面に、
アクリル系バツクサイズ剤(日本合成ゴム株式会社製の
商品名「AE318」)を塗布し、130℃で3分間乾
燥して、塗布量が10g/m2の目止め層を形成した。こ
の目止め層を形成した和紙の反対面に、上記の再剥離用
水分散型感圧性接着剤を塗布し、150℃で3分間乾燥
処理することにより、厚さが20μmの感圧性接着剤層
を形成して、再剥離用感圧性接着テ―プを作製した。Next, on one side of Japanese paper having a basis weight of 30 g / m 2 ,
An acrylic backsize agent (trade name “AE318” manufactured by Nippon Synthetic Rubber Co., Ltd.) was applied and dried at 130 ° C. for 3 minutes to form a filling layer having an applied amount of 10 g / m 2 . The water-dispersible pressure-sensitive adhesive for re-peeling is applied to the opposite surface of the Japanese paper on which the filling layer is formed, and dried at 150 ° C. for 3 minutes to form a pressure-sensitive adhesive layer having a thickness of 20 μm. After forming, a pressure-sensitive adhesive tape for re-peeling was prepared.
【0027】実施例2 温度計、攪拌機、窒素導入管および還流冷却管を備えた
反応器に、アクリル酸2−エチルヘキシル69部、メタ
クリル酸1部、ラウリル硫酸アンモニウム1.4部を水
74部で乳化したものを入れ、攪拌しながら1時間窒素
置換した。2,2−アゾビス(2−メチルプロピオンア
ミジン)二硫酸塩0.02部を加えて、重合温度50℃
の条件下で5時間乳化重合した。その後、再び2,2−
アゾビス(2−メチルプロピオンアミジン)二硫酸塩
0.01部を加え、アクリル酸ブチル30部、ラウリル
硫酸アンモニウム0.6部を水15部で乳化したものを
重合温度50℃の条件下、1時間かけて滴下した。重合
温度50℃の条件下でさらに2時間乳化重合した。10
重量%アンモニア水で中和して、2相構成の重合体粒子
を含む水分散液を得た。この水分散液に、その固形分1
00部に対して、エポキシ系架橋剤0.1部、ロジンフ
エノ―ル系タツキフアイヤ(軟化点125℃)乳濁液1
5部を加え、よく混合して、再剥離用水分散型感圧性接
着剤を調製した。この再剥離用水分散型感圧性接着剤を
用いた以外は、実施例1と同様にして、再剥離用感圧性
接着テ―プを作製した。Example 2 In a reactor equipped with a thermometer, a stirrer, a nitrogen inlet tube and a reflux condenser, 69 parts of 2-ethylhexyl acrylate, 1 part of methacrylic acid and 1.4 parts of ammonium lauryl sulfate were emulsified with 74 parts of water. The resulting mixture was put in, and replaced with nitrogen for 1 hour while stirring. 0.02 parts of 2,2-azobis (2-methylpropionamidine) disulfate was added, and the polymerization temperature was 50 ° C.
Emulsion polymerization for 5 hours under the conditions described above. Then, again,
Azobis (2-methylpropionamidine) disulfate (0.01 part) was added, and 30 parts of butyl acrylate and 0.6 part of ammonium lauryl sulfate were emulsified with 15 parts of water. And dropped. Emulsion polymerization was carried out for a further 2 hours at a polymerization temperature of 50 ° C. 10
Neutralization was carried out with aqueous ammonia by weight to obtain an aqueous dispersion containing two-phase polymer particles. This aqueous dispersion has a solid content of 1
0.1 part of epoxy cross-linking agent, rosin phenol-based tackifier (softening point 125 ° C) emulsion 1
Five parts were added and mixed well to prepare a water-dispersible pressure-sensitive adhesive for re-peeling. A pressure-sensitive adhesive tape for re-peeling was prepared in the same manner as in Example 1 except that this water-dispersible pressure-sensitive adhesive for re-peeling was used.
【0028】実施例3 温度計、攪拌機、窒素導入管および還流冷却管を備えた
反応器に、アクリル酸2−エチルヘキシル97部、メタ
クリル酸1部、メタクリル酸メチル2部、ポリオキシエ
チレンラウリルフエニルエ―テル硫酸アンモニウム3部
を水160部で乳化したものを入れ、攪拌しながら1時
間窒素置換した。これに過酸化水素0.03部を加え、
アスコルビン酸ナトリウム0.03部を水10部に溶解
したものを滴下しながら、重合温度30℃の条件下で3
時間乳化重合した。10重量%アンモニア水で中和し
て、重合体粒子を含む水分散液Y1を得た。EXAMPLE 3 97 parts of 2-ethylhexyl acrylate, 1 part of methacrylic acid, 2 parts of methyl methacrylate, polyoxyethylene laurylphenyl were placed in a reactor equipped with a thermometer, a stirrer, a nitrogen inlet tube and a reflux condenser. A solution obtained by emulsifying 3 parts of ammonium ether sulfate with 160 parts of water was added, and the mixture was purged with nitrogen for 1 hour while stirring. 0.03 parts of hydrogen peroxide was added to this,
A solution prepared by dissolving 0.03 part of sodium ascorbate in 10 parts of water was added dropwise at a polymerization temperature of 30 ° C.
Emulsion polymerization was carried out for hours. The resultant was neutralized with 10% by weight aqueous ammonia to obtain an aqueous dispersion Y1 containing polymer particles.
【0029】これとは別に、温度計、攪拌機、窒素導入
管および還流冷却管を備えた反応器に、アクリル酸ブチ
ル100部、ポリオキシエチレンラウリルフエニルエ―
テル硫酸アンモニウム3部を水160部で乳化したもの
を入れ、攪拌しながら1時間窒素置換した。これに過酸
化水素0.03部を加えて、アスコルビン酸ナトリウム
0.03部を水10部に溶解したものを滴下しながら、
重合温度10℃の条件下で3時間乳化重合した。10重
量%アンモニア水で中和して、重合体粒子を含む水分散
液Y2を得た。Separately, 100 parts of butyl acrylate, polyoxyethylene laurylphenyl ether were placed in a reactor equipped with a thermometer, a stirrer, a nitrogen inlet tube and a reflux condenser.
A solution obtained by emulsifying 3 parts of ammonium tersulfate with 160 parts of water was added, and the mixture was purged with nitrogen for 1 hour while stirring. To this, 0.03 part of hydrogen peroxide was added, and a solution obtained by dissolving 0.03 part of sodium ascorbate in 10 parts of water was added dropwise.
Emulsion polymerization was carried out for 3 hours at a polymerization temperature of 10 ° C. The resultant was neutralized with 10% by weight aqueous ammonia to obtain an aqueous dispersion Y2 containing polymer particles.
【0030】上記の水分散液Y1に、その重合体粒子8
0部に対して、上記の水分散液Y2を、その重合体粒子
が20部となるように混合した。これにさらにロジンフ
エノ―ル系タツキフアイヤ(軟化点125℃)乳濁液1
5部、エポキシ系架橋剤0.1部を加え、よく混合し
て、再剥離用水分散型感圧性接着剤を調製した。この水
分散型感圧性接着剤を用いた以外は、実施例1と同様に
して、再剥離用感圧性接着テ―プを作製した。The polymer particles 8 are added to the above aqueous dispersion Y1.
The above-mentioned aqueous dispersion Y2 was mixed with 0 parts so that the polymer particles became 20 parts. In addition to this, rosin phenol-based Takifiya (softening point 125 ° C) emulsion 1
Five parts and 0.1 part of an epoxy crosslinking agent were added and mixed well to prepare a water-dispersible pressure-sensitive adhesive for re-peeling. A pressure-sensitive adhesive tape for re-peeling was produced in the same manner as in Example 1 except that this water-dispersed pressure-sensitive adhesive was used.
【0031】実施例4 実施例3で得た水分散液Y1に、その重合体粒子60部
に対して、実施例3で得た水分散液Y2を、その重合体
粒子が40部となるように混合した。これにさらにロジ
ンフエノ―ル系タツキフアイヤ(軟化点125℃)乳濁
液15部、エポキシ系架橋剤0.1部を加え、よく混合
して、再剥離用水分散型感圧性接着剤を調製した。この
水分散型感圧性接着剤を用いた以外は、実施例1と同様
にして、再剥離用感圧性接着テ―プを作製した。Example 4 The aqueous dispersion Y2 obtained in Example 3 was added to the aqueous dispersion Y1 obtained in Example 3 with respect to 60 parts of the polymer particles so that the polymer particles became 40 parts. Was mixed. To this, 15 parts of a rosin phenol-based tackifier (softening point: 125 ° C.) emulsion and 0.1 part of an epoxy-based crosslinking agent were added and mixed well to prepare a water-dispersible pressure-sensitive adhesive for re-peeling. A pressure-sensitive adhesive tape for re-peeling was produced in the same manner as in Example 1 except that this water-dispersed pressure-sensitive adhesive was used.
【0032】実施例5 温度計、攪拌機、窒素導入管および還流冷却管を備えた
反応器に、アクリル酸ブチル100部、ポリオキシエチ
レンラウリルエ―テル硫酸アンモニウム3部を水160
部で乳化したものを入れ、攪拌しながら1時間窒素置換
した。過酸化水素0.03部を加え、アスコルビン酸ナ
トリウム0.03部を水10部に溶解させたものを滴下
しながら、重合温度50℃の条件下で3時間乳化重合し
た。10重量%アンモニア水で中和して、重合体粒子を
含む水分散液Y3を得た。Example 5 100 parts of butyl acrylate and 3 parts of ammonium polyoxyethylene lauryl ether sulfate were placed in a reactor equipped with a thermometer, a stirrer, a nitrogen inlet tube and a reflux condenser, and mixed with 160 parts of water.
The mixture emulsified in the above portion was added, and the atmosphere was replaced with nitrogen for 1 hour while stirring. Emulsion polymerization was carried out for 3 hours at a polymerization temperature of 50 ° C. while adding dropwise 0.03 part of hydrogen peroxide and dissolving 0.03 part of sodium ascorbate in 10 parts of water. The resultant was neutralized with 10% by weight aqueous ammonia to obtain an aqueous dispersion Y3 containing polymer particles.
【0033】実施例3で得た水分散液Y1に、その重合
体粒子60部に対して、上記の水分散液Y3を、その重
合体粒子が40部となるように混合した。これにさらに
エポキシ系架橋剤0.1部を加え、よく混合して、再剥
離用水分散型感圧性接着剤を調製した。この水分散型感
圧性接着剤を用いた以外は、実施例1と同様にして、再
剥離用感圧性接着テ―プを作製した。To the aqueous dispersion Y1 obtained in Example 3, 60 parts of the polymer particles were mixed with 60 parts of the above-mentioned aqueous dispersion Y3 such that the polymer particles became 40 parts. Further, 0.1 part of an epoxy-based crosslinking agent was added thereto and mixed well to prepare a water-dispersible pressure-sensitive adhesive for re-peeling. A pressure-sensitive adhesive tape for re-peeling was produced in the same manner as in Example 1 except that this water-dispersed pressure-sensitive adhesive was used.
【0034】比較例1 実施例3で得た水分散液Y1に、その重合体粒子100
部に対して、ロジンフエノ―ル系タツキフアイヤ(軟化
点125℃)乳濁液15部、エポキシ系架橋剤0.1部
を加え、よく混合して、再剥離用水分散型感圧性接着剤
を調製した。この水分散型感圧性接着剤を用いた以外
は、実施例1と同様にして、再剥離用感圧性接着テ―プ
を作製した。Comparative Example 1 The polymer particles 100 were added to the aqueous dispersion Y1 obtained in Example 3.
To each part, 15 parts of a rosin phenol-based tackifier (softening point: 125 ° C.) emulsion and 0.1 part of an epoxy crosslinking agent were added and mixed well to prepare a water-dispersible pressure-sensitive adhesive for re-peeling. . A pressure-sensitive adhesive tape for re-peeling was produced in the same manner as in Example 1 except that this water-dispersed pressure-sensitive adhesive was used.
【0035】比較例2 実施例3で得た水分散液Y2に、その重合体粒子100
部に対して、ロジンフエノ―ル系タツキフアイヤ(軟化
点125℃)乳濁液15部、エポキシ系架橋剤0.1部
を加え、よく混合して、再剥離用水分散型感圧性接着剤
を調製した。この水分散型感圧性接着剤を用いた以外
は、実施例1と同様にして、再剥離用感圧性接着テ―プ
を作製した。Comparative Example 2 The polymer particles 100 were added to the aqueous dispersion Y2 obtained in Example 3.
To each part, 15 parts of a rosin phenol-based tackifier (softening point: 125 ° C.) emulsion and 0.1 part of an epoxy crosslinking agent were added and mixed well to prepare a water-dispersible pressure-sensitive adhesive for re-peeling. . A pressure-sensitive adhesive tape for re-peeling was produced in the same manner as in Example 1 except that this water-dispersed pressure-sensitive adhesive was used.
【0036】以上の実施例1〜5および比較例1,2で
調製した各再剥離用感圧性接着テ―プについて、下記の
方法により、自背面固定性および再剥離性を調べた。こ
れらの結果は、後記の表1に示されるとおりであつた。With respect to the pressure-sensitive adhesive tapes for re-peeling prepared in Examples 1 to 5 and Comparative Examples 1 and 2, the self-backing property and the re-peeling property were examined by the following methods. These results were as shown in Table 1 below.
【0037】<自背面固定性>ステンレス板に再剥離用
感圧性接着テ―プ(幅18mm)を貼り付け、この感圧性
接着テ―プの背面(目止め層形成面)に同種の感圧性接
着テ―プ(幅18mm)の感圧性接着剤層側を重ね合わ
せ、500gのロ―ラで1往復圧着したのち、室温(2
3℃)で30分間放置する。その後、80℃の条件下で
10分間放置し、引き続き80℃の雰囲気下で、テ―プ
の貼り付け面から引き剥がし角度が90°になるよう3
0gの荷重をかけ、1時間後の剥離距離(cm)を測定し
た。<Self-backside fixing property> A pressure-sensitive adhesive tape (width: 18 mm) for re-peeling was attached to a stainless steel plate, and the same type of pressure-sensitive adhesive was applied to the back surface (the surface on which the sealing layer was formed) of the pressure-sensitive adhesive tape. The pressure-sensitive adhesive layer side of the adhesive tape (18 mm in width) is overlaid and pressed back and forth with a 500 g roller, and then room temperature (2 mm).
(3 ° C.) for 30 minutes. Thereafter, the tape is left to stand at 80 ° C. for 10 minutes, and then, under an atmosphere of 80 ° C., so that the peeling angle is 90 ° from the tape application surface.
A load of 0 g was applied and the peel distance (cm) after 1 hour was measured.
【0038】<再剥離性>感圧性接着テ―プ(幅18m
m)をメラミン塗装板に貼り合わせ、その上からラツカ
―塗料を吹き付け、80℃の熱風オ―ブンに1時間投入
して乾燥した。熱風オ―ブンから取り出したのち、直ち
に感圧性接着テ―プをメラミン塗装板から剥離し、メラ
ミン塗装板上の糊残りの状態を、目視にて以下の基準で
判定した。 ○:糊残りがない △:糊残りが部分的にある ×:全面に糊残りがある<Removability> Pressure-sensitive adhesive tape (width 18 m)
m) was adhered to a melamine coated plate, and a lacquer coating was sprayed thereon, and the mixture was put into a hot air oven at 80 ° C. for 1 hour and dried. Immediately after being removed from the hot air oven, the pressure-sensitive adhesive tape was peeled off from the melamine coated plate, and the state of the adhesive residue on the melamine coated plate was visually judged according to the following criteria. :: no adhesive residue △: partial adhesive residue ×: adhesive residue on the entire surface
【0039】 [0039]
【0040】上記の表1の結果から明らかなように、本
発明の実施例1〜5の各再剥離用感圧性接着テ―プは、
自背面固定性を満足し、しかも、比較例1,2のものに
比べて、被着体への貼り付け後高温に晒されたのちでも
凝集破壊による糊残りなどを起こすことなく容易に再剥
離できるものであることがわかる。As is clear from the results in Table 1 above, each of the pressure-sensitive adhesive tapes for peeling of Examples 1 to 5 of the present invention was
Satisfies the self-backside fixing property, and more easily peels off without sticking residue due to cohesive failure even after being exposed to high temperature after being attached to the adherend, as compared with those of Comparative Examples 1 and 2. It turns out that it can be done.
【0041】なお、実施例4において、水分散液Y1と
Y2との混合に際して、水分散液Y2の混合比率をさら
に高くする、たとえば水分散液Y1の重合体粒子を30
部、水分散液Y2の重合体粒子を70部にすると、再剥
離性が低下してくる傾向がみられた。この結果から、両
分散液Y1,Y2の混合に際して、前者の重合体粒子が
50〜90重量%、後者の重合体粒子が50〜10重量
%となるように、混合するのが好ましいことが確認され
た。In Example 4, when mixing the aqueous dispersions Y1 and Y2, the mixing ratio of the aqueous dispersion Y2 was further increased, for example, the polymer particles of the aqueous dispersion Y1 were reduced by 30%.
When the polymer particles of the aqueous dispersion Y2 were 70 parts by mass, the removability tended to decrease. From these results, it was confirmed that it is preferable to mix both dispersions Y1 and Y2 such that the former polymer particles are 50 to 90% by weight and the latter polymer particles are 50 to 10% by weight. Was done.
【0042】[0042]
【発明の効果】以上のように、本発明は、単量体組成の
異なる2相構成の重合体粒子を生成するか、または単量
体組成の異なる2種の重合体粒子を生成してこれをブレ
ンドすることにより、とくに上記異なる単量体組成とし
て、一方がカルボキシル基含有単量体を含み、他方がカ
ルボキシル基含有単量体およびカルボキシル基と反応す
る官能性単量体を含まない構成としたことにより、自背
面固定性にすぐれ、かつ被着体への貼り付け後高温雰囲
気下に晒されたのちでも凝集破壊を起こすことなく被着
体表面から容易に剥離できるマスキング用感圧性接着シ
―ト類などとして有用なアクリル系の再剥離用感圧性接
着剤を提供することができる。As described above, according to the present invention, two-phase polymer particles having different monomer compositions are produced, or two types of polymer particles having different monomer compositions are produced. By blending, in particular, as the different monomer composition, one contains a carboxyl group-containing monomer, and the other does not contain a carboxyl group-containing monomer and a functional monomer that reacts with a carboxyl group. As a result, the pressure-sensitive adhesive sheet for masking has excellent self-backing properties and can be easily peeled off from the surface of the adherend without causing cohesive failure even after being exposed to a high temperature atmosphere after pasting to the adherend. The present invention can provide an acrylic pressure-sensitive adhesive for re-peeling, which is useful as, for example, adhesives.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 吉田 良徳 大阪府茨木市下穂積1丁目1番2号 日東 電工株式会社内 ──────────────────────────────────────────────────の Continued from the front page (72) Yoshinori Yoshida, Inventor 1-1-2 Shimohozumi, Ibaraki-shi, Osaka Nitto Denko Corporation
Claims (4)
アルキル基の炭素数が4〜12の(メタ)アクリル酸ア
ルキルエステルを主成分とし、かつカルボキシル基含有
単量体を含む単量体混合物の共重合体からなる相と、
B)アルキル基の炭素数が4〜12の(メタ)アクリル
酸アルキルエステルを主成分とし、かつカルボキシル基
含有単量体およびカルボキシル基と反応する官能性単量
体を含まない単量体の重合体からなる相との2相構成と
されていることを特徴とする再剥離用水分散型感圧性接
着剤。The polymer particles emulsified and dispersed in water are as follows: A)
A phase comprising a copolymer of a monomer mixture containing a (meth) acrylic acid alkyl ester having 4 to 12 carbon atoms as a main component and a carboxyl group-containing monomer;
B) The weight of a monomer mainly containing an alkyl (meth) acrylate having an alkyl group of 4 to 12 carbon atoms and not containing a carboxyl group-containing monomer and a functional monomer that reacts with the carboxyl group. A water-dispersible pressure-sensitive adhesive for re-peeling, which has a two-phase configuration including a phase comprising a united body.
重量%、B相が50〜10重量%である請求項1に記載
の再剥離用水分散型感圧性接着剤。2. The composition according to claim 1, wherein the phase A constituting the polymer particles is 50 to 90.
The water-dispersible pressure-sensitive adhesive for re-peeling according to claim 1, wherein the content of the B-phase is 50 to 10% by weight.
アルキル基の炭素数が4〜12の(メタ)アクリル酸ア
ルキルエステルを主成分とし、かつカルボキシル基含有
単量体を含む単量体混合物の共重合体からなる粒子と、
b)アルキル基の炭素数が4〜12の(メタ)アクリル
酸アルキルエステルを主成分とし、かつカルボキシル基
含有単量体およびカルボキシル基と反応する官能性単量
体を含まない単量体の重合体からなる粒子との2種の重
合体粒子で構成されていることを特徴とする再剥離用水
分散型感圧性接着剤。3. The polymer particles emulsified and dispersed in water, comprising: a)
Particles composed of a copolymer of a monomer mixture containing a (meth) acrylic acid alkyl ester having 4 to 12 carbon atoms as a main component and a carboxyl group-containing monomer,
b) The weight of a monomer containing an alkyl (meth) acrylate having 4 to 12 carbon atoms in the alkyl group as a main component and not containing a carboxyl group-containing monomer and a functional monomer that reacts with the carboxyl group. A water-dispersible pressure-sensitive adhesive for re-peeling, which comprises two kinds of polymer particles including particles of coalescing.
0重量%、b粒子が50〜10重量%である請求項3に
記載の再剥離用水分散型感圧性接着剤。4. The method according to claim 1, wherein the a particles constituting the polymer particles are 50 to 9
The removable water-dispersible pressure-sensitive adhesive according to claim 3, wherein 0% by weight and b particles are 50 to 10% by weight.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5506698A JPH11256125A (en) | 1998-03-06 | 1998-03-06 | Water-dispersion type pressure sensitive adhesive for re-peeling |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5506698A JPH11256125A (en) | 1998-03-06 | 1998-03-06 | Water-dispersion type pressure sensitive adhesive for re-peeling |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11256125A true JPH11256125A (en) | 1999-09-21 |
Family
ID=12988330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5506698A Pending JPH11256125A (en) | 1998-03-06 | 1998-03-06 | Water-dispersion type pressure sensitive adhesive for re-peeling |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH11256125A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007002147A (en) * | 2005-06-27 | 2007-01-11 | Toyo Ink Mfg Co Ltd | Aqueous adhesive composition and method for producing the same |
WO2008000742A1 (en) * | 2006-06-30 | 2008-01-03 | Basf Se | Adhesive film with at least two continuous phases |
-
1998
- 1998-03-06 JP JP5506698A patent/JPH11256125A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007002147A (en) * | 2005-06-27 | 2007-01-11 | Toyo Ink Mfg Co Ltd | Aqueous adhesive composition and method for producing the same |
WO2008000742A1 (en) * | 2006-06-30 | 2008-01-03 | Basf Se | Adhesive film with at least two continuous phases |
US8268390B2 (en) * | 2006-06-30 | 2012-09-18 | Basf Aktiengesellschaft | Adhesive film having at least two continuous phases |
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