Method for preparing bitumen/polymer compositions,...

Details Method for preparing bitumen/polymer compositions,... Method for preparing bitumen/polymer compositions,...

C - Chemistry, Metallurgy

08

L

C08L 95/00 (2006.01) C08K 3/06 (2006.01) C08K 5/00 (2006.01) C08K 5/372 (2006.01) C08L 9/06 (2006.01) C10C 3/02 (2006.01)

Patent

CA 2258795

The invention concerns a method for producing bitumen/polymer compositions which consists in contacting, between 100 ·C and 230 ·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.

Ces compositions bitume/polymère sont produites en mettant en contact, entre 100 °C et 230 °C et sous agitation, un bitume ou mélange de bitumes avec au moins un copolymère de styrène et de butadiène, qui a une teneur globale en butadiène allant de 50 % à 95 % en poids et une teneur en motifs butadiène à double liaison 1,2 comprise entre 12 % et 50 % en poids du copolymère, et, de préférence, également avec un agent de couplage donneur de soufre ou un agent de fonctionnalisation. Lesdites compositions bitume/polymère sont utilisables, directement ou après dilution, pour former des liants bitume/polymère pour revêtements.

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