| 摘要 |
<p>1. Method for preparing bitumen-polymer compositions wherein a butadiene-styrene block copolymer based mother solution is mixed with a bitumen, characterized in that the mother solution is obtained by stirring at a temperature between 120 to 180 degrees C a butadiene-styrene copolymer in a medium consisting of a heavy essentially aromatic cut resulting from the cracking of a petroleum cut, the product being then added with from 0,2 to 2% sulphur whereas stirring is continued, the temperature being kept within the above mentioned range.</p> |
