Method for preparing a bitumen/elastomer composition, and...

Details Method for preparing a bitumen/elastomer composition, and... Method for preparing a bitumen/elastomer composition, and...

C - Chemistry, Metallurgy

08

L

C08L 95/00 (2006.01) C08G 81/02 (2006.01) C08K 5/36 (2006.01) C08L 53/02 (2006.01) C10C 3/02 (2006.01)

Patent

CA 2208587

Functionalised elastomer/bitumen compositions with a broad plasticity range are produced by contacting a bitumen or bitumen mixture with an elastomer, a functionalising agent and optionally a peroxide compound at 100-230 DEG C under stirring conditions. The functionalising agent is a thiolcarboxylic acid having 3 or more carbon atoms, a thiolcarboxylic acid ester and specifically a disulphide having carboxylic groupings or carboxylic esters. Said compositions may be used either directly or in diluted form to produce bituminous binders for making road surfacings, coated materials and sealing coatings.

Des compositions bitume/élastomère fonctionnalisées, à large intervalle de plasticité, sont produites en mettant en contact, entre 100 ° C et 230 ° C et sous agitation, un bitume ou mélange de bitumes, un élastomère, un agent de fonctionnalisation et éventuellement un composé peroxydé, l'agent de fonctionnalisation étant un acide thiolcarboxylique en C3 et plus, un ester d'acide thiolcarboxylique et plus particulièrement un disulfure à groupements carboxyliques ou esters carboxyliques. Ces compositions sont utilisables, directement ou après dilution, pour former des liants bitumineux pour la réalisation de revêtements routiers, d'enrobés et de revêtements d'étanchéité.

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