... 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 ... acid and alkaline, viscosity adjusting and thermal stabilizing, Generally, the petroleum resins are not used independently, but have to be used ... .0MAX.ASH CONTENT, % 0.1MAX.APPEARANCE yellow flake or granule petroleum resin C5,C9