| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot-melt sticky adhesive easy in coating at a relatively low temperature, long in open time and excellent in retentivity and tackiness. SOLUTION: This hot-melt sticky adhesive comprises a block copolymer composition comprising a block copolymer A represented by general formula (A): Ar1<SP>a</SP>-D<SP>a</SP>-Ar2<SP>a</SP>and a block copolymer B represented by general formula (B): (Ar<SP>b</SP>-D<SP>b</SP>)<SB>n</SB>-X, and a resin giving adhesiveness and containing 1-70 wt.% aromatic monomer unit (in the formula (A) and formula (B), Ar1<SP>a</SP>and Ar<SP>b</SP>are each an aromatic vinyl polymer block having a weight average molecular weight of 6,000-20,000, Ar2<SP>a</SP>is an aromatic vinyl polymer block having a weight average molecular weight of 22,000-400,000, D<SP>a</SP>and D<SP>b</SP>are each a conjugated diene polymer block having a vinyl bond content of 1-20 mol%, X is a single bond or a residue of a coupling agent and n is an integer of not smaller than 2). COPYRIGHT: (C)2011,JPO&INPIT |
