| 摘要 |
<p>A composition for asphalt modification which comprises (i) a block (co) polymer represented by the general formula (S-B)m-S' n (I) (wherein S and S' each is a polymer block consisting mainly of an aromatic vinyl compound; B is a polymer block consisting mainly of a conjugated diene; and m and n each is 0 or 1, provided that m+ n is 1 or larger) and having a content of all combined aromatic vinyl compounds of 10 to 100 wt.%, excluding 10 wt.%, and (ii) at least one ingredient represented by the general formula S-B-S (II), the general formula S-B-S' (III), and/or the general formula (S-B)2-X (IV) (in the formulae (II) to (IV), S, S', and B have the same meanings as in the general formula (I) and X is a residue of a coupling agent), the (i)/(ii) weight ratio being (10-40)/(90-60); and an asphalt composition comprising asphalt and the modifying composition added thereto. The composition for asphalt modification is excellent in solubility in asphalt and storage stability at high temperatures, has a low melt viscosity, and gives excellent asphalt properties. The asphalt composition is usable for road pavement or as a waterproof sheet.</p> |
