阅读说明：本技术 沥青组合物及其制备方法 (Asphalt composition and preparation method thereof ) 是由 R·Q·克鲁特兹 E·耶乐玛 D·A·都波伊斯 S·普查尔斯基 C·L·威利斯 C·M·卢 于 2018-05-18 设计创作，主要内容包括：提供了偶联的嵌段共聚物组合物,其具有在制备、加工和处理条件下的高粘度、在沥青混合条件下的低粘度以及合适的粘度稳定性的组合。所述组合物包含：(i)二嵌段共聚物,(ii)至少一种线性三嵌段共聚物,其峰值分子量为所述二嵌段共聚物的峰值分子量的1.5-3.0倍,和(iii)至少一个多臂偶联的嵌段共聚物,其峰值分子量为所述二嵌段共聚物的峰值分子量的1.5-9.0倍,及其混合物。所述嵌段共聚物组合物的特征在于在110℃或更低温度下的熔体粘度大于2.0E7泊,并且在180℃下24小时后的偶联效率小于25％。(Coupled block copolymer compositions are provided that have a combination of high viscosity under manufacturing, processing and handling conditions, low viscosity under asphalt mixing conditions, and suitable viscosity stability. The composition comprises: (i) a diblock copolymer, (ii) at least one linear triblock copolymer having a peak molecular weight that is 1.5 to 3.0 times the peak molecular weight of the diblock copolymer, and (iii) at least one multiarm coupled block copolymer having a peak molecular weight that is 1.5 to 9.0 times the peak molecular weight of the diblock copolymer, and mixtures thereof. The block copolymer composition is characterized by a melt viscosity greater than 2.0E7 poise at 110 ℃ or less and a coupling efficiency less than 25% after 24 hours at 180 ℃.)