In order to obtain light-colored and high-quality C5/C9 copolymer petroleum resin,C5 distillate,dicyclopentadiene(DCPD)and C9 distillate were used as raw materials.The raw material ratio of C5:(DCPD):C9 = 350ml:350ml:200ml.The effects of reaction temperature and reaction time on the yield,softening point and chroma of copolymerized petroleum resin were investigated in detail.The results show that when the reaction temperature is 240-245℃and the reaction time is 7-8 hours,the high quality petroleum resin with chroma of 4#can be obtained,and the yield of petroleum resin is over 60%.
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