Bitumen compositions and a process for their preparation

Details Bitumen compositions and a process for their preparation Bitumen compositions and a process for their preparation

C - Chemistry, Metallurgy

08

L

C08L 95/00 (2006.01)

Patent

CA 2252556

The present invention provides a bitumen composition comprising a bitumen component, a thermoplastic rubber in an amount of less than 8 wt.% and an ethylene-vinyl acetate copolymer in an amount of less than 5 wt.%, both based on total bitumen composition, wherein the ethylene-vinyl acetate copolymer has a vinyl content in the range of from 20 to 35 wt.%, based on copolymer; a process for preparing such bitumen composition; and the use of such bitumen compositions in asphalt mixtures for road applications.

L'invention concerne une composition de bitume comprenant un composant de bitume, un caoutchouc thermoplastique en une quantité inférieure à 8 % en poids, et un copolymère éthylène-vinyl acétate en une quantité inférieure à 5 % en poids, toutes deux sur la base de la composition totale. Le copolymère éthylène-vinyl acétate a une teneur en vinyle comprise entre 20 et 35 % en poids, sur la base du copolymère. L'invention concerne également un procédé permettant de préparer ladite composition de bitume, ainsi que l'utilisation de cette dernière dans des mélanges d'asphalte destinés à des routes.

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