| abstract |
(57) [Summary] [Object] To provide a hydrocarbon resin having good solubility in an aliphatic solvent such as hexane and having high reactivity with other monomers. [Structure] (A) A fraction containing an aliphatic unsaturated hydrocarbon having a boiling point of -20 to 100 ° C., which is produced during the decomposition and refining of petroleum, and (B) dicyclopentadiene − Polymerized in the presence of a Del Crafts-type catalyst, and relative to 95 to 50 parts by weight of the aliphatic unsaturated hydrocarbon (A), (B) Including 5 to 50 parts by weight, the iodine value is 100 (g / Hydrocarbon resin of 100 g) or more. |