| 摘要 |
PURPOSE:To produce a petroleum resin having stable physical properties in high productivity, by preparing a fraction containing unsaturated hydrocarbon by the thermal cracking of petroleum, polymerizing the fraction in the presence of a Friedel-Crafts catalyst, and contacting the product with water, etc. in the presence of a specific surfactant, thereby removing impurities from the product. CONSTITUTION:A fraction containing unsaturated hydrocarbons and prepared by the thermal cracking of petroleum is polymerized in the presence of a Friedel-Crafts catalyst, and the oily fraction containing the polymerization product is made to contact with water on an alkaline aqueous solution in the presence of a surfactant of formula (R1-R4 are H or alkyl; c, d, f, g and h are numbers to give a polyoxyalkylene copolymer having an average molecular weight of >=1,000 and an ethylene oxide unit content of 40-100%, e is 2-4) or formula I and formula II (R is alkyl group of a fatty acid; R5 and R6 are H or alkyl; a and b are numbers to give a polyoxyalkylene copolymer having an average molecular weight of >=1,000 and an ethylene oxide unit content of 40-100%). The objective polymer is separated from the oil-phase fraction.
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