Abstract: An adhesive composition which comprises an admixture of at least one of natural rubber and synthetic rubbers with a tackifying resin containing carbon-to-carbon unsaturation therein prepared by reacting in the presence of an aliphatic solvent and a catalyst selected from aluminum chloride and ethyl aluminum dichloride a monomer mixture comprised of about 88 to about 98 weight percent of a selected diolefin/olefin mixture and, correspondingly, about 12 to about 2 weight percent .alpha.-methyl styrene. Said adhesive composition has particular utility for use as a pressure sensitive adhesive.

Abstract: An adhesive composite which comprises an admixture of at least one of natural rubber and synthetic rubbers with a tackifying resin containing carbon-to-carbon unsaturation therein prepared by reacting in the presence of an aliphatic solvent and a catalyst selected from aluminum chloride and ethyl aluminum dichloride a monomer mixture comprised of about 60 to about 75 weight percent of a selected diolefin/olefin mixture and correspondingly about 40 to about 25 weight percent .alpha.-methyl styrene. Said adhesive composite has particular utility for use as a pressure sensitive adhesive.