METHOD FOR PRODUCING PETROLEUM RESIN AND HYDROGENATED PETROLEUM RESIN

摘要

A method for producing a petroleum resin, which comprises carrying out a copolymerization reaction in the presence of a cyclopentadiene type compound, a vinyl-substituted aromatic compound containing substantially no high molecular weight polymeric material and a solvent. The method allows the production of a petroleum resin and a hydrogenated petroleum resin which is reduced in the content of a high molecular weight polymeric material and has a narrow molecular weight distribution.