| 摘要 |
[Problem] To provide: an acrylic block copolymer with which it is possible to present exceptional adhesive strength, cohesive strength, holding power, tack, and-hot melt coating properties when used in a pressure-sensitive adhesive composition; and a pressure-sensitive adhesive composition containing this block copolymer. [Solution] An acrylic block copolymer (I) having at least two polymer blocks (A) comprising methacrylic acid ester units and at least one polymer block (B) comprising an acrylic acid ester unit, the acrylic block copolymer (I) having an (A)-(B)-(A) block structure, a weight-average molecular weight (Mw) of 30,000-100,000, and a melt viscosity at 100°C of 100,000 mPa・s or less as measured by a type-B viscometer. |
