Utilization of high boiling fractions in preparing petroleum resins

Claim 1

AN IMPROVED PROCESS FOR THE PREPARATION OF A HYDROCARBON-SOLUBLE PETROLEUM RESIN WHICH COMPRISES STEAM CRACKING AT ABOUT 540* TO 815*C. A PETROLEUM FRACTION BOILING BETWEEN ABOUT 85* AND 500*C. SELECTED FROM A GROUP CONSISTING OF NAPHTHA, KEROSENE, AND GAS OIL, REMOVING FROM THE RESULTING STEAM CRACKED PRODUCT A SECOND FRACTION BOILING BETWEEN ABOUT 85* AND 275*C. CONTAINING 10 TO 20WT. PERCENT DIOLEFINS, 18 TO 60 WT. PERCENT AROMATIC HYDROCARBONS, 20-60 WT. PERCENT MONOOLEFINS AND 0 TO 30 WT. PERCENT PARAFFINS AND NAPTHENES WHEREIN AT LEAST 70 WT. PERCENT OF SUCH SECOND FRACTION BOILS ABOVE ABOUT 130* AND WHEREIN 5 TO 20 WT. PERCENT OF SAID SECOND FRACTION IS MADE UP OF REACTIVE AROMATIC HYDROCARBONS SELECTED FROM A GROUP CONSISTING OF C8 TO C14 VINYL AROMATIC HYDROCARBONS AND INDENES, POLYMERIZING SAID SECOND FRACTION BY CONTACTING IT WITH A FRIEDEL-CRAFTS POLYMERIZATION CATALYST AT ABOUT -10*C. TO ABOUT +70* C. AND RECOVERING THE RESULTING HYDROCARBON-SOLUBLE RESIN.