METHOD FOR REMOVING METAL CATALYST FROM HYDROGENATED POLYMER SELECTIVELY HYDROGENATED BY ORGANOTITANIUM COMPOUND

PROBLEM TO BE SOLVED: To remove a residual catalyst material in a polymer solution after the selective hydrogenation of an unsaturated double bond in a conjugated diene polymer using an organotitanium compound of homogeneous phase as a catalyst. SOLUTION: A step for selectively hydrogenating an olef...

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Hauptverfasser:	SO MYOUNGSEUP, ROW KYUNGHO, KIM JAE YUN, KIM HOOCHAE, KO YUN-FUUN
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To remove a residual catalyst material in a polymer solution after the selective hydrogenation of an unsaturated double bond in a conjugated diene polymer using an organotitanium compound of homogeneous phase as a catalyst. SOLUTION: A step for selectively hydrogenating an olefin double bond in a homopolymer of conjugated diene monomer or a copolymer of the monomer and an aromatic vinylmonomer by the catalyst comprising the organotitanium compound or the combination of the compound with a reducing agent and a step for removing the residual metal catalyst in a hydrogenated polymer using an inorganic acid-containing alcohol and water after the hydrogenation step are provided.