PROCEDE DE PREPARATION DE COMPOSITIONS BITUME/ELASTOMERE FONCTIONNALISE A LARGE INTERVALLE DE PLASTICITE, APPLICATION DES COMPOSITIONS OBTENUES A LA REALISATION DE REVETEMENTS ET SOLUTION MERE POUR CETTE PREPARATION

摘要

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.