C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 95/00 (2006.01)
Patent
CA 2242016
This invention involves mixtures of bitumen, rubber crumb and at least one copolymer of an alpha-olefin and at least one unsaturated epoxide, such that the Brookfield viscosity at 180 degrees Celsius, in accordance with NFT standard 76102, using a No. 27 spindle, is less than 1,150 mPa.s, and the absolute value difference between softening points, in accordance with NFT standard 66008, between the upper and lower fractions of a mixture stored for 3 days at 180 degrees Celsius in a vertical tube, is less than or equal to 5 degrees Celsius. These mixtures are useful as asphalt binders and remain very stable during storage.
La présente invention concerne des mélanges de bitume, de poudrette de caoutchouc et d'au moins un copolymère d'une alpha-oléfine et d'au moins un époxyde insaturé, tels que la viscosité Brookfield à 180°C selon la norme NFT 76102 avec une aiguille 27 est inférieure à 1150 m.Pa.s, et la différence en valeur absolue des points de ramollissement selon la norme NFT 66008 entre les fractions haute et basse d'un mélange conservé 3 jours à 180°C dans un tube vertical est inférieure ou égale à 5°C. Ces mélanges sont utiles comme liants routiers et sont très stables au stockage.
Lebez Jean
Montignac Guillaume
Perret Patrice
Elf Atochem S.a.
Ogilvy Renault
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