METHOD FOR PREPARING BITUMEN/POLYMER COMPOSITIONS, USE THEREOF IN SURFACING MATERIALS

摘要

The invention concerns a method for producing bitumen/polymer compositions which consists in contacting, between 100 DEG C and 230 DEG C and under agitation, a bitumen or a mixture of bitumen's with at least one styrene and butadiene copolymer, having a global butadiene content ranging between 50 % and 95 wt. % and a content of butadiene 1,2 double-bond structural units ranging between 12 % and 50 wt. % of the copolymer, and, preferably also a sulphuring coupling agent or a functionalising agent. Said bitumen/polymer compositions are usable, directly or after dilution, for forming bitumen/polymer binders for surfacing materials.