| http://www.w3.org/ns/prov#value | - A hydrocarbon resin comprising 45 to 85% by weight of a unit derived from 1,3-pentadiene (a), 10 to 45% by weight of a unit derived from ??-methylstyrene (b), 3 to 20% by weight of a unit derived from cyclopentene (c), and 2 to 15% by weight of a unit derived from 1,3-butadiene (d), and having a softening point of from 60??? C. to 120??? C. is especially preferred as the tackifying resin.
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