| 摘要 |
<p>Bituminous compositions comprising: a. 92-75%w of a bituminous component Q whose aromaticity expressed as a fraction of aromatic carbon of the n-heptane maltene phase (fa) is higher than 0.004xP+0.280, in which P represents the n-heptane asphaltene content of the bituminous component, b. 4-15%w of a block copolymer M1 with the general formula A-B-A, in which the two A's represent the same or different thermoplastic non-elastomeric polymer blocks prepared by polymerization of one or more monovinyl aromatics and in which B represents an elastomeric polymer block prepared either by polymerization of one or more conjugated alkadienes, or by copolymerization of one or more conjugated alkadienes with one or more monovinyl aromatics, polymer block B, mentioned above, being completely or partly hydrogenated, if desired, and c. 4-15%w of a thermoplastic polymer M2 differing from component M1 and having a molecular weight higher than 10 000, a solubility parameter between 7.8 and 8.8 and a crystallinity of less than 60% at 25.degree.C.</p> |
