JP2011219582A5 - - Google Patents

Claims (6)

アルキル基の炭素数が１〜１２の（メタ）アクリル酸アルキルエステルおよびカルボキシル基含有単量体を含有するモノマー成分を重合させてなる（メタ）アクリル系共重合体を幹ポリマーとし、（メタ）アクリル系マクロモノマーを枝ポリマーとする（メタ）アクリル系グラフト共重合体と架橋剤と充填剤とを含有することを特徴とする感圧接着剤。 A (meth) acrylic copolymer obtained by polymerizing a monomer component containing a (meth) acrylic acid alkyl ester having a C 1-12 alkyl group and a carboxyl group-containing monomer is used as a backbone polymer, and (meth) A pressure-sensitive adhesive comprising a (meth) acrylic graft copolymer having an acrylic macromonomer as a branch polymer, a crosslinking agent, and a filler. （メタ）アクリル系マクロモノマーの重量平均分子量が、１万以上である請求項１に記載の感圧接着剤。The pressure-sensitive adhesive according to claim 1, wherein the (meth) acrylic macromonomer has a weight average molecular weight of 10,000 or more. モノマー成分が、アルキル基の炭素数が１〜１２の（メタ）アクリル酸アルキルエステル８５〜９９質量％およびカルボキシル基含有単量体１〜１５質量％を含有する請求項１または２に記載の感圧接着剤。The feeling of Claim 1 or 2 in which a monomer component contains 85-99 mass% of (meth) acrylic acid alkyl ester whose carbon number of an alkyl group is 1-12, and 1-15 mass% of carboxyl group-containing monomers. Pressure adhesive. （メタ）アクリル系マクロモノマーのガラス転移温度が、２０℃以下である請求項１〜３のいずれかに記載の感圧接着剤。The pressure-sensitive adhesive according to any one of claims 1 to 3, wherein the glass transition temperature of the (meth) acrylic macromonomer is 20 ° C or lower. （メタ）アクリル系マクロモノマーの量が、モノマー成分１００質量部あたり、１〜２０質量部である請求項１〜４のいずれかに記載の感圧接着剤。The pressure-sensitive adhesive according to any one of claims 1 to 4, wherein the amount of the (meth) acrylic macromonomer is 1 to 20 parts by mass per 100 parts by mass of the monomer component. さらに（メタ）アクリル系グラフト共重合体１００質量部あたり５〜１０００質量部の割合で充填剤を含有してなる請求項１〜５のいずれかに記載の感圧接着剤。The pressure-sensitive adhesive according to any one of claims 1 to 5, further comprising a filler at a ratio of 5 to 1000 parts by mass per 100 parts by mass of the (meth) acrylic graft copolymer.