Aqueous asphalt emulsions containing liquefied or...

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 3/00 (2006.01) C08K 3/20 (2006.01) C08L 95/00 (2006.01) C08L 19/00 (2006.01)

Patent

CA 2448437

Nonthixotropic, aqueous emulsions prepared from rubber modified asphalt cement (RMAC). The RMAC is prepared by a method whereby recycled tire rubber is liquified or otherwise consumed by or incorporated into asphalt such that no more than 2% by weight of solid particulate rubber remains. The RMAC may be emulsified in an aqueous or partially aqueous emulsification solution using a one-step or multi-step emulsification process. These aqueous RMAC emulsions are useable in many applications including paving, seal coat, roofing and slurry seal applications.

La présente invention concerne des émulsions aqueuses non thixotropes préparées à partir de ciment bitumineux modifié au caoutchouc. Ce ciment bitumineux est préparé selon un procédé au cours duquel du caoutchouc de pneumatique recyclé est liquéfié ou encore absorbé par du bitume ou incorporé dans du bitume, de telle sorte qu'il ne reste pas plus de 2 % en poids de particules de caoutchouc solides. Le ciment bitumineux modifié au caoutchouc peut être émulsionné dans une solution d'émulsification aqueuse ou partiellement aqueuse en un processus d'émulsification à une ou à plusieurs étapes. Ces émulsions aqueuses de ciment bitumineux modifié au caoutchouc peuvent être utilisées dans plusieurs applications, y compris, les applications de pavage, de couche de scellement, de toiture et de coulis bitumineux.

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