| 摘要 |
Fast-breaking bituminous emulsions are prepared by using a liquid emulsifying agent obtained by condensation at a temperature of 160 DEG -180 DEG C. of diethylenetriamine and a C12-18 fatty acid having an iodine value of at least 25, followed by at least partial cyclization of the condensation product at a temperature between approximately 190 DEG and 240 DEG C., the initial molar ratio between the diethylenetriamine and the fatty acid being at least 5 to 1, and the end product having a total amine index of at least 5.6 and optionally containing up to 10% free diethylenetriamine. |
