Asphalt compositions and methods of preparation thereof

Details Asphalt compositions and methods of preparation thereof Asphalt compositions and methods of preparation thereof

C - Chemistry, Metallurgy

08

L

C08L 95/00 (2006.01) C08K 3/32 (2006.01)

Patent

CA 2285387

Systems and methods for combining a mineral acid and a polymer additive in an asphalt composition are described. Methods of preparing a polymer modified asphalt include providing a source of a neat asphalt; heating the neat asphalt (10); providing a source of a polymer, adding (50) the polymer to the neat asphalt to form a blend; providing a source of a dilution asphalt; and adding (60) the blend to the dilution asphalt to form a diluted product. The systems and methods provide advantages in that the addition of the mineral acid widens the temperature range in which satisfactory performance from a given polymer asphalt composition can be achieved or, as a corollary, reduces the amount of polymer additive that would otherwise be needed to achieve satisfactory performance within a given temperature range.

L'invention porte sur un système et des procédés de combinaison d'un acide minéral et d'un polymère d'addition à une composition d'asphalte. Les procédés de préparation de l'asphalte modifiée par un polymère consistent: à se procurer de l'asphalte pure (10); à la chauffer; à se procurer du polymère; à l'ajouter à l'asphalte pure pour former un mélange; à se procurer un diluant de l'asphalte; à l'ajouter (50) au mélange pour former un produit dilué. Les systèmes et procédés s'appuient sur le fait que l'adjonction d'un acide minéral élargit la plage des températures où l'on obtient des performances satisfaisantes d'une composition donnée polymère/asphalte ou, corollairement, réduit la quantité d'additif autrement nécessaire pour atteindre des performances satisfaisantes à l'intérieur d'une plage donnée de températures.

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