Title: Method for preparing bitumen/polymer compositions, use thereof in surfacing materials
Application Number: 98800700 Application Date: 1998.04.17
Publication Number: 1226910 Publication Date: 1999.08.25
Approval Pub. Date: 2003.09.03 Granted Pub. Date: 2003.09.03
International Classifi-cation: C08K3/06;C08K5/00;C08K5/372;C08L95/00;C10C3/02
Applicant(s) Name: Elf Antar France Address:
Inventor(s) Name: J. -P. Planche;A. Zins;C. Lacour
Attorney & Agent: wang jie
Abstract:
    The invention provides a method for producing bitumen/polymer compositions which consists of contacting, between 100 DEG C. and 230 DEG C. and under agitation, a bitumen or a mixture of bitumens 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 functionalizing agent. The bitumen/polymer compositions are usable, directly or after dilution, for forming bitumen/polymer binders for surfacing materials.
Time: 4