PRESSURE-SENSITIVE ADHESIVE

PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive which quickly wets a surface of metal and plastic such as PP, PE and polycarbonate, and a surface of an automotive paint or the like, and forms strong adhesion.SOLUTION: There are provided a pressure-sensitive adhesive which contains a) at least one polymer containing the following monomers, in a ratio of at least 50 wt.% with respect to the total weight of the pressure-sensitive adhesive: a1) at least one (meth)acrylate containing branched primary alcohol having a glass transition temperature of a homopolymer of -60°C at the maximum and one isoindex as a base; a2) at least one (meth)acrylate containing linear C1-18 alcohol as a base; and a3) an acrylic acid, b) at least one synthetic rubber in a ratio of at least 5 wt.% with respect to the total weight of the pressure-sensitive adhesive, and c) at least one adhesive force-reinforcing resin in a ratio of at least 10 wt.% with respect to the total weight of the pressure-sensitive adhesive; and an adhesive tape containing the pressure-sensitive adhesive and a foamed carrier.SELECTED DRAWING: Figure 1 【課題】金属、ＰＰ、ＰＥ、ポリカーボネート等のプラスチック表面、並びに自動車塗料等の表面を素早く湿潤し、強い接着を形成する感圧接着剤の提供。【解決手段】ａ）感圧接着剤の総重量を基準に少なくとも５０重量％の、以下のモノマーを含む少なくとも一種のポリマーと、ａ１）ホモポリマーのガラス転移温度が最大−６０℃、１のイソインデックスを有する分岐状第一級アルコールをベースとする少なくとも一種の（メタ）アクリル酸エステル、ａ２）線状Ｃ１〜１８のアルコールをベースとする少なくとも一種の（メタ）アクリル酸エステル、ａ３）アクリル酸、ｂ）感圧接着剤の総重量を基準に少なくとも５重量％の少なくとも一種の合成ゴムと、ｃ）感圧接着剤の総重量を基準に少なくとも１０重量％の割合の少なくとも一種の接着力増強樹脂と、を含む感圧接着剤及び発泡キャリアを含む接着テープ。【選択図】図１