| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing polymer-modified bituminous binder compositions for road/paving applications that has high ductility without the necessity of adding crosslinking agents. <P>SOLUTION: The method includes: heating a bitumen component in a stirred tank to a temperature from 160 to 221°C; adding a block copolymer composition to the bitumen component while the bitumen component is being stirred to form a homogeneous mixture; and continuing to stir the homogeneous mixture while maintaining the temperature, at a temperature from 180 to 221°C for a total period of time from 2 to 30 hours, thereby forming a cured polymer-modified bituminous binder composition. The block copolymer composition comprises one or more block copolymers having at least one monovinylaromatic block, at least one polybutadiene block having a vinyl content of less than 15 mol percent, and at least one polybutadiene block having a vinyl content of greater than 25 mol percent. <P>COPYRIGHT: (C)2013,JPO&INPIT |
