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    • 6. 发明专利
    • CONTINUOUS SULFONATION OF POLYSTYRENE
    • JPS63172703A
    • 1988-07-16
    • JP286087
    • 1987-01-09
    • LION CORP
    • NAGANO KATSUMASAMIKUCHI FUMIHIROTERAO TOSHIMIKITANO KYOZO
    • C08F8/36
    • PURPOSE:To produce a high-purity water-soluble polystyrenesulfonate easily with a high yield and good efficiency of use of a solvent, by supplying a raw material solution in which PS has been dissolved and a sulfonating agent to a sulfonation reactor separately at a rate which satisfies specific conditions, and reacting them. CONSTITUTION:A raw material solution (a) made up of 1-100pts.wt. PS having an average m.w. of 200-50,000 dissolved in 100pts.wt. 1-2C aliphatic hydrocarbon solvent (e.g., 1,2-dichloroethane), and a sulfonating agent (b) comprising SO3 in an amount of 0.7-2.0 (molar ratio) per constituent monomer unit of the PS are separately and continuously supplied to a sulfonation reactor with a stirrer having a shearing force of 0.05N/cm or more at a rate which satisfies a conditions stipulated by the formula [wherein V1 is the linear velocity (Cm/s) of introduction of the component (b) into the reactor; V2 is the linear velocity of introduction of the component (a) into the reactor; and A is the amount of the solvent (weight ratio) per pt.wt. PS contained in the component (a)], and the sulfonating reaction is effect at 10-80 deg.C for a residence time of 1-60min.