| abstract |
(57) [Summary] [Purpose] The impact absorption of this block copolymer is improved by blending a block copolymer having a specific structure with a softening agent and a tackifying resin, resulting in low hardness and impact absorption. Get excellent materials. [Structure] A vinyl aromatic monomer and isoprene, butadiene, or isoprene-butadiene blocks made of isoprene, butadiene, or isoprene-butadiene blocks having a vinyl bond content of 30% or more, and a tan 100 parts by weight of a block copolymer having a peak temperature of δ of -20 ° C or higher and a peak value of tan δ of 0.3 or more, and 10 to 2000 parts by weight of a softening agent, A composition comprising 10 to 2000 parts by weight of a tackifying resin. |