| 摘要 |
<p>A tackifier composition comprising (a) 100 parts by weight of a block copolymer composed of at least two terminal polymer blocks A and at least one intermediate polymer block B, said block A being a polymer block substantially derived from an aromatic vinyl compound, said block B being a polymer block substantially derived from isobutylene, the content of the aromatic vinyl compound being 5 to 50 % by weight, and the number average molecular weight of the block copolymer being 30,000 to 500,000, (b) 20 to 200 parts by weight of a tackifier resin, and (c) 5 to 150 parts by weight of a softener. 1</p> |
