... mainly use c9 petroleum resins, dcpd resins and c5 / c9 copolymerized resins with high softening points, petroleum resins are added to paints can ... . 2) rubbers: Mainly use c5 petroleum resins, c5 / c9 copolymerized resins and dcpd resins with low softening points, these kinds of ... . 4) printing inks: Usually, the c9 petroleum resins and dcpd resins which hare high softening point are used for printing ...