Process for the preparation of petroleum resins

Claim 1

A PROCESS FOR THE PREPARATION OF PETROLEUM RESINS FROM HYDROCARBON FRACTIONS CONTAINING OLEFIN AND DIOLEFINS HAVING A BOILING RANGE OF FROM ABOUT 120* TO 220*C WHICH COMPRISES A. SUBJECTING SAID HYDROCARBON FRACTION TO PREPOLYMERIZATION IN THE PRESENCE OF 2-10 PARTS BY WEIGHT ACTIVATED CLAYS/100 PARTS OF THE FRACTION ITSELF AT 25* - 35*C FOR 20-40 MINUTES WITH TRANSFORMATION INTO HIGGH-BOILING PRODUCTS IN QUANTITIES EQUAL TO ABOUT 1-10 PERCENT BY WEIGHT WITH RESPECT TO THE FRACTION ITSELF B. SEPARATING THE PREPOLYMERIZATION PRODUCT FROM THE ACTIVATED CLAYS TO OBTAIN A HYDROCARBON SOLUTION TO THEPOLYMER, C. DISTILLING SAID HYDROCARBON SOLUTION TO OBTAIN A RESIDUAL HYDROCARBON FRACTON HAVING A MAXIMUM BOILING POINT OF 210* - 230*C, D. SUBJECTING THE RESIDUAL HYDROCARBN FRACTION TO POLYMERIZATION IN THE PRESENCE OF 0.1 - 1.0 PARTS BY WEIGHT TO 100 PARTS BY WEIGHT OF THE FRACTION OF FRIECEL-CRAFTS CATALYST AT 25* - 70*C FOR 20-90 MINUTES WITH CONVERSATION INTO POLYMER OF A QUALITY EQUAL TO OR SMALLER THAN ABOUT 40 PERCENT BY WEIGHT WITH RESPECT TO THE HYDROCARBON FRACTION FED TO THE PREPOLYMERIZATION, E. TREATING THE PRODUCT FROM STEP (D) WITH ACTIVE EARTHS IN A QUALITY OF 2-10 PARTS OF SAID PRODUCT FOR 1-60 MINUTES AT 10* -60, F. SEPARATING SAID PRODUUCT FROM THE ACTIVE EARTHS AND G. DISTILLING SAIDD PRODUCT TO REMOVE LOW-BOILING CONSTITUENTS THEREFROM AND RECOVERING PETROLEUM RESIN FROM THEPOLYMERIZATION PRODUCT HAVING AT 125* - 130*C.