Bitumen compositions

C - Chemistry – Metallurgy – 08 – L

Patent

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C08L 95/00 (2006.01)

Patent

CA 2186787

Improved bitumen compositions containing (A) 100 parts of bitumen, (B) 0.1-10 parts of an alpha-olefin copolymer, an unsaturated epoxy and an unsaturated carboxylic acid ester, (C) 0.1-10 parts of an alpha-olefin copolymer and an unsaturated carboxylic acid ester, (D) 0-10 parts of a thermoplastic elastomer, (E) 0-10 parts of a polymer reactive with (B), and (F) 0-10 parts of an ethylene/vinyl acetate copolymer. Such bitumens are storage-stable and rut-resistant.

L'invention concerne des compositions améliorées de bitumes comprenant: (A) 100 parties de bitume, (B) 0,1 à 10 parties d'un copolymère d'une alpha oléfine, d'un epoxyde insaturé et d'un ester d'acide carboxylique insaturé; (C) 0,1 à 10 parties d'un copolymère d'une alpha oléfine et d'un ester d'acide carboxylique insaturé; (D) 0 à 10 parties d'un élastomère thermoplastique; (E) 0 à 10 parties d'un polymère réactif avec (B); (F) 0 à 10 parties d'un copolymère éthylène/acétate de vinyle. Ces bitumes sont stables au stockage et résistent à l'orniérage.

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