... 9-11& 18,softening point 90--140 deg.C Petroleum resin is a kind of thermal plasticizing resin produced by ... C5, C9 fraction, by-products of petroleum cracking, through pretreatment, polymerization and distillation. It isn't ... and alkaline, viscosity adjusting and thermal stabilizing, Generally, the petroleum resins are not used independently, but have to be used together ...