Patent ID: 8735500

Claim:
A hydrocarbon polymer modifier, comprising: an interpolymer of (i) a piperylene component; (ii) an aromatic component; and (iii) a cyclic pentadiene component comprising a dicyclopentadiene fraction (DCPD fraction) and a dimethylcyclopentadiene fraction (MCPD fraction), wherein a weight ratio of the MCPD fraction to the DCPD fraction is from 0.8:1 to 100:1, wherein the MCPD fraction is at least 20 wt % of the cyclic pentadiene component; and wherein the interpolymer comprises (a) a softening point from 40° C. to 160° C., (b) Mn greater than 400, (c) Mz less than 15,000, and (d) at least 8 mole percent aromatic hydrogen, based on the total moles of hydrogen in the interpolymer.