Patent ID: 9023944
Filing Date: 2015-05-05
Classification: C08F

Abstract:
1. A method for producing a hydrogenated petroleum resin, comprising: thermally polymerizing a cyclopentadiene compound and a vinyl aromatic compound to obtain a copolymer; adding hydrogen to the copolymer to obtain a hydrogenated product; separating a hydrogenation solvent from the hydrogenated product using a first evaporator; separating, using a second evaporator, a remaining amount of the hydrogenation solvent and a low molecular weight component from the hydrogenated product from which the hydrogenated solvent is separated by the first evaporator; providing an analytical curve database that stores analytical curve data and a calculating portion that measures physical properties based on the analytical curve data; measuring a near-infrared absorption spectrum of a molten resin from which the hydrogenation solvent and the low molecular weight component are separated; calculating the physical properties of the molten resin based on a measurement result of the near-infrared absorption spectrum and the analytical curve data, thereby calculating a difference between the calculated physical properties and preset target physical properties of the hydrogenated petroleum resin to be produced; and controlling a reaction condition for hydrogenating the molten resin comprising at least one of a temperature, pressure, reaction time and amount of the hydrogen to reduce the difference between the calculated physical properties of the molten resin and the preset target physical properties of the hydrogenated petroleum resin.