PROCESS FOR THE PREPARATION IN AQUEOUS EMULSION OF A BITUMEN / POLYMER BINDER WITH CONTINUOUS THREE-DIMENSIONAL POLYMERIC STRUCTURE AND APPLICATION OF THIS BINDER TO THE PRODUCTION OF COATINGS OR COATINGS.

摘要

P A bitumen / polymer component crosslinkable with sulfur is brought to an emulsion formation zone (i), which is in the form of a melt having a temperature between 100degree C and 230degree C and a viscosity of at most 2 Pa.s at said temperature, (ii) an aqueous phase containing an emulsifying system and having a temperature between 10degree C and 90degree C and (iii) a crosslinking system donating sulfur in an appropriate amount, the weight ratio of the bitumen / polymer component in the aqueous phase ranging from 30:70 to 85:15, and the reaction medium thus formed is maintained, in the emulsion formation zone, at a temperature between 50degree C and 160degree C up to obtaining a bitumen / polymer binder emulsion in which the polymer of said binder is crosslinked in a three-dimensional structure. The emulsion obtained can be used for the production of road surfaces, asphalt or waterproofing coatings. /P