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通过对乙烯副产C5、C9混合馏份的研究，合成出色相（Fe－Co）≤5＃．软化点≥90℃的共聚石油树脂。为乙烯副产C5、C9馏份的利用再找出一条出路。
Through the research on the mixed by-product C5 and C9 of ethylene, the color phase (Fe-Co) ≤5 # was synthesized. Softening point ≥ 90 ℃ copolymer petroleum resin. For ethylene byproduct C5, C9 fraction of the use and then find a way out.