Bituminous composition with reduced gelation tendency

Details Bituminous composition with reduced gelation tendency Bituminous composition with reduced gelation tendency

C - Chemistry, Metallurgy

08

L

C08L 95/00 (2006.01) C08L 53/02 (2006.01)

Patent

CA 2432529

The present invention concerns a bituminous composition which comprises a bituminous component (I), a block copolymer (II), comprising at least two terminal blocks of a poly(monovinylaromatic hydrocarbon) and at least one block of a poly(conjugated diene), and optionally a filler (III), wherein (II) is a partially hydrogenated block polymer, comprising butadiene as the conjugated diene, wherein the poly(conjugated diene) block upon partial hydrogenation comprises less than 3 mol% 1,2-dine recurring units (A) and less than 20 mol% preferably less than 3 mol% ethylene recurring units (D), calculated on the total content mol/mol of conjugated diene recurring units.

L'invention concerne une composition bitumineuse comprenant un composant bitumineux (I), un copolymère séquencé (II), contenant au moins deux séquences terminales d'un poly(hydrocarbure monovinylaromatique) et au moins une séquence d'un poly(diène conjugué), et éventuellement une charge (III). Dans cette composition, (II) est un copolymère partiellement hydrogéné, comprenant du butadiène comme diène conjugué, la séquence de poly(diène conjugué) après hydrogénation partielle comprenant moins de 3 mole % d'unités périodiques 1,2-diène (A) et moins de 20 mole %, de préférence moins de 3 mole %, d'unités périodique éthylène (D), calculées sur le contenu total en mole/mole des unités périodiques diène conjugué.

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