Asphalt compositions, method of preparation, and use
AssigneeTotal Raffinage Distribution S.A.
InventorsDidier Jamois, Yannick Jolivet, Pierre Le Perchec, Bernard Fixari
Life of this patent
Estimating the term…
Abstract
A modified or bridged asphalt composition. The composition can be obtained by treating at least one asphalt base with an acid-derived compound having at least two functional groups capable, respectively, of being grafted onto one or more sites located on two or more different aromatic entities of the asphalt base, so as to link said entities by bridging.
Claims19
A modified asphalt composition, said composition having been obtained by a process consisting essentially of treating at least one asphalt base with an acid-derived compound containing at least two functional groups capable of being grafted, respectively, onto one or more sites located on two or more different aromatic entities of the asphalt base, so as to effect grafting of such functional groups at such sites and thereby to link said entities by bridging through said acid-derived compound and thus modify the asphalt base and obtain the modified asphalt composition, wherein the acid-derived compound is selected from the group consisting of a dianhydride and an acid dihalide.
A process for preparing a modified asphalt composition consisting essentially of treating an asphalt base having at least two aromatic entities with at least one acid-derived compound having at least two functional groups, each group being capable of being grafted onto a site of the two aromatic entities of the asphalt base, the treatment being carried out under conditions suitable for attaining bridging of the two aromatic entities by said acid-derived compound, whereby the asphalt base is modified and the modified asphalt base is obtained, wherein the acid-derived compound is selected from the group consisting of a dianhydride and an acid dihalide.
A modified asphalt composition consisting essentially of an asphalt base having two or more different aromatic entities;
- wherein the two or more different aromatic entities are linked by bridging from an acid-derived compound having at least two functional groups grafted onto one or several sites located on the two or more different aromatic entities thereby modifying the asphalt base and providing the modified asphalt composition;
- and, wherein the acid-derived compound is selected from the group consisting of a dianhydride and an acid dihalide.
A process for preparing a modified asphalt composition from an asphalt base consisting essentially of grafting an acid-derived compound having at least two functional groups capable of being so grafted onto one or several sites located on two or more different aromatic entities of the asphalt base, so as to link the entities by bridging and thereby modify the asphalt base and provide the modified asphalt composition, wherein the acid-derived compound is selected from the group consisting of a dianhydride and an acid dihalide.
Dependencies are inferred from the claim text.