Synthetic resin and method of producing the same

Claim 1

THE PROCESS FOR PREPARING AN OIL-MODIFIED RESINOUS COMPOSITION, WITH COMPRISES: (1) REACTING A POLYOLEFINIC PETROLEUM RESIN WITH AN ALIPHATIC POLYBASIC ACIDIC DIENOPHILE AT A TEMPERATURE BETWEEN ABOUT 300*F. AND ABOUT 450*F., THE QUANTITY OF SAID DIENOPHILE BEING FROM ABOUT 5 TO ABOUT 12 PERCENT BY WEIGHT OF SAID PETROLEUM RESIN, WHEREUPON AN ADDUCT OF SAID REACTANTS IS FORMED, (2), REACTING SAID ADDUCT WITH AN OIL HAVING AN IODINE NUMBER UP TO ABOUT 200, THE QUANTITY OF OIL SO REACTED BEING SUCH THAT THE FINAL PRODUCT HAS AN OIL LENGTH BETWEEN ABOUT 5 AND 18, IN THE PRESENCE OF AN ACIDOLYSIS CATALYST AT A TEMPERATURE BETWEEN ABOUT 400*F. AND ABOUT 500*F. FOR ABOUT 1 TO ABOUT 2 HOURS, TO FORM AN ACIDIC PRODUCT, AND (3) REACTING SAID ACIDIC PRODUCT WITH A POLYHYDRIC MATERIAL HAVING UP TO FOUR HYDROXYL GROUPS PER MOLECULE AND BEING SELECTED FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOL AND A POLYHYDRIC PHENOL AT A TEMPERATURE FROM ABOUT 400*F. TO ABOUT 450*F., THE QUANTITY OF POLYHYDRIC MATERIAL SO REACTED BEING AT LEAST SUFFICIENT FOR COMPLETE ESTERIFICATION OF THE CARBOXYLIC ACID GROUPS PRESENT IN SAID ACIDIC PRODUCT, WHEREUPON THE DESIRED OILMODIFIED RESINOUS COMPOSITION IS FORMED, SAID POLYOLEFINIC PETROLEUM RESIN BEING DERIVED FROM TAR BOTTOMS OBTAINED BY CRACKING OF PETROLEUM, AND HAVING FOLLOWING CHARACTERISTICS: RANGE IODINE NUMBER ---------------- 90-225. SPECIFIC GRAVITY ------------- 1.00-1.10. ACID NUMBER ------------------ 0-2. SAPONIFICATION NUMBER -------- 0-2. VISCOSITY (S.U.S. AT 210*F) ---- 120-190 TO SOLID.