Stabilized bitumen compositions

Details Stabilized bitumen compositions Stabilized bitumen compositions

C - Chemistry, Metallurgy

08

L

C08L 95/00 (2006.01)

Patent

CA 2158928

Two or more different polymeric materials are stably incorporated into bitumen by effecting steric stabilization of a polyolefin such as polyethylene, and by dispersing the other polymer, such as a styrene-butadiene-styrene copolymer, an ethylene-vinyl acetate copolymer or an EPDM copolymer in the stabilized polyethylene-bitumen composition. The ability to incorporate different polymeric materials in bitumen permits desirable modifications to the properties of the composition to be effected. In addition, different properties can be attained by modifying processing parameters.

On incorpore d'une manière stable deux matériaux polymères différents ou davantage dans un bitume en procédant à une stabilisation stérique d'une polyoléfine telle qu'un polyéthylène et en dispersant l'autre polymère, tel qu'un copolymère bloc styrène-butadiène-styrène, un copolymère éthylène-acétate de vinyle ou un terpolymère éthylène-propylène-diène dans la composition stabilisée polyéthylène-bitume. La possibilité d'incorporer différents matériaux polymères dans le bitume permet d'obtenir des modifications souhaitables des propriétés des compositions. En plus, on peut obtenir différentes propriétés en modifiant les paramètres de fabrication.

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