ASPHALT MODIFIER ENHANCING VISCOSITY FOR DRAINAGE PAVEMENT AND ITS PREPARATION METHOD

摘要

Provided are a draining asphalt modifier which is improved in the viscosity at 60 deg.C and is lowered in cost by reducing the using amount when an asphalt mixture is prepared, and its preparation method. The asphalt modifier comprises 100 parts by weight of a radial styrene-butadiene-styrene mixture base resin; 10-60 parts by weight of an adhesion imparting resin; and 5-70 parts by weight of a processing aid selected from a mineral process oil, a liquid resin and a liquid butadiene rubber, a polybutene, a polyisobutylene, an oil substituted with a polar functional group, and a fatty oil. The radial styrene-butadiene-styrene mixture base resin comprises 40-100 wt% of a radial styrene-butadiene-styrene mixture base resin having 2-6 branches, 0-40 wt% of a linear styrene-butadiene-styrene resin, 0-30 wt% of a multi-block styrene-butadiene-styrene resin, and 0-10 wt% of a styrene-butadiene di-block copolymer resin, contains 15-50 wt% of styrene, and has a molecular weight of 50,000-300,000.