Thermoreversibly crosslinked elastic bituminous composition

A method for preparing thermoreversibly crosslinked elastic bituminous compositions comprising combining at least one organogelling molecule of general formula (I) taken alone or in a mixture, with a bitumen, wherein general formula (I) is

• where:
• A represents an acyclic, cyclic or polycyclic, saturated or unsaturated, linear or branched hydrocarbon group of 3 to 92 carbon atoms, resulting from the polymerization of the side chains of at least one unsaturated fatty acid;
• X represents an NH group or an oxygen atom O;
• R1 represents a group chosen from:
• a linear or branched hydrocarbon group of 2 to 40 carbon atoms, optionally comprising one or more heteroatoms and optionally comprising one or more unsaturations, or a substituted or unsubstituted aromatic group;
• R2 represents a group chosen from:
• a hydrogen atom, a linear or branched hydrocarbon group of 1 to 40 carbon atoms, comprising one or more heteroatoms and optionally comprising one or more unsaturations, or a substituted or unsubstituted aromatic group;
• m and n represent independently of each other an integer that varies from 1 to 4;
• p represents an integer that varies from 0 to 4;
• q represents an integer that varies from 1 to 4 or a combination of these values;
• and
• Y represents a group comprising a hydrogen bond donor and a hydrogen bond acceptor.

A process for obtaining a bituminous composition comprising an organogelling molecule of general formula (I) taken alone or in a mixture, being introduced hot, at temperatures between 70 and 220° C., into bitumen alone, into polymeric bitumen, into an anhydrous or emulsified bituminous binder, or into a mix, wherein general formula (I) is

• where:
• A represents an acyclic, cyclic or polycyclic, saturated or unsaturated, linear or branched hydrocarbon group of 3 to 92 carbon atoms, resulting from the polymerization of the side chains of at least one unsaturated fatty acid;
• X represents an NH group or an oxygen atom O;
• R1 represents a group chosen from:
• a linear or branched hydrocarbon group of 2 to 40 carbon atoms, optionally comprising one or more heteroatoms and optionally comprising one or more unsaturations, or a substituted or unsubstituted aromatic group;
• R2 represents a group chosen from:
• a hydrogen atom, a linear or branched hydrocarbon group of 1 to 40 carbon atoms, comprising one or more heteroatoms and optionally comprising one or more unsaturations, or a substituted or unsubstituted aromatic group;
• m and n represent independently of each other an integer that varies from 1 to 4;
• p represents an integer that varies from 0 to 4;
• q represents an integer that varies from 1 to 4 or a combination of these values;
• and
• Y represents a group comprising a hydrogen bond donor and a hydrogen bond acceptor.