Patent ID: 7670420

Claim:
A binder for the production of a layer and/or a coating containing aggregates for road works and/or civil engineering, consisting essentially of, based on the total weight of (a) and (b): (a) 60 to 80% in weight of at least one natural or modified natural resin, of vegetable origin, having a softening point measured according to the standard EN 1427 of 100° C. to 200° C.; (b) 20 to 40% in weight of at least one oil of vegetable origin having a viscosity at 25° C. of 50 mPa·s to 1000 Pa·s, (c) optionally one or several coloring agents, and (d) the vegetable oil(s) are used (i) without a catalyst or (ii) in the presence of a catalyst selected from the group consisting of cobalt octanoates or naphtenates, zirconium octanoates or naphtenates and manganese octanoates or naphtenates, wherein said binder has: (e) a penetrability of 25° C., measured according to the standard NF EN 1426, of 20 to 300 1/10 mm and a softening point of 30 to 75° C., measured according to the standard NF EN 1427; wherein said binder is exempt of any natural or synthetic elastomer and of any thermoplastic polymer.