Patent ID: 7534924

Claim:
A hydrocarbon mixture obtained from petroleum cuts, which is a complex hydrocarbon mixture comprising polycyclic aromatic compounds (PACs), and other aromatic compounds, in which at least some of the PACs are modified, characterized in that these modified PACs have a chemical structure with an average molar mass of between 150 and 10,000, this chemical structure being represented by formula (I) below: (A) x (PAC) y (I) in which x and y are integers corresponding to the number of A and PAC units, respectively, chosen such that x/y is greater than or equal to 1, wherein the A unit represents a polymerizable monomer or a mixture of monomers, comprising from 2 to 60 carbon atoms, characterized in that the A unit comprises an A monomer of formula (II) below: in which R 1 , R 2 , R 3 and R 4 are identical or different and are chosen from the group consisting of hydrogen, linear or branched alkyl groups comprising from 1 to 10 carbon atoms, which are unsubstituted or substituted with halogen atoms, aromatic or nonaromatic rings and/or alkyloxycarbonyl acetate, acrylate and alkyl acrylate groups, or chosen such that at least two groups R 1 and R 3 , or R 2 and R 4 , are linked to form a ring containing 5 or 6 carbon atoms, and characterized in that the A monomer comprises a compound chosen from alkenyl halides, alkenyl acetates, acrylic derivatives, styrene and its derivatives, and heterocycles comprising at least one oxygen, nitrogen or sulfur heteroatom.